7637b6cc |
1 | /* |
2 | * ia32rtools |
2c10ea1f |
3 | * (C) notaz, 2013-2015 |
7637b6cc |
4 | * |
5 | * This work is licensed under the terms of 3-clause BSD license. |
6 | * See COPYING file in the top-level directory. |
ea43585b |
7 | * |
8 | * recognized asm hint comments: |
9 | * sctattr - function attributes (see code) |
10 | * sctend - force end of function/chunk |
11 | * sctpatch: <p> - replace current asm line with <p> |
12 | * sctproto: <p> - prototype of ref'd function or struct |
13 | * sctref - variable is referenced, make global |
14 | * sctskip_start - start of skipped code chunk (inclusive) |
15 | * sctskip_end - end of skipped code chunk (inclusive) |
7637b6cc |
16 | */ |
17 | |
33c35af6 |
18 | #define _GNU_SOURCE |
c36e914d |
19 | #include <stdio.h> |
20 | #include <stdlib.h> |
21 | #include <string.h> |
b62264bc |
22 | #include <math.h> |
e27467d0 |
23 | #include <errno.h> |
c36e914d |
24 | |
25 | #include "my_assert.h" |
26 | #include "my_str.h" |
9ea60b8d |
27 | #include "common.h" |
c36e914d |
28 | |
c36e914d |
29 | #include "protoparse.h" |
30 | |
06c5d854 |
31 | static const char *asmfn; |
c36e914d |
32 | static int asmln; |
06c5d854 |
33 | static FILE *g_fhdr; |
c36e914d |
34 | |
940e8e66 |
35 | #define anote(fmt, ...) \ |
36 | printf("%s:%d: note: " fmt, asmfn, asmln, ##__VA_ARGS__) |
c36e914d |
37 | #define awarn(fmt, ...) \ |
940e8e66 |
38 | printf("%s:%d: warning: " fmt, asmfn, asmln, ##__VA_ARGS__) |
c36e914d |
39 | #define aerr(fmt, ...) do { \ |
940e8e66 |
40 | printf("%s:%d: error: " fmt, asmfn, asmln, ##__VA_ARGS__); \ |
33c35af6 |
41 | fcloseall(); \ |
c36e914d |
42 | exit(1); \ |
43 | } while (0) |
44 | |
054f95b2 |
45 | #include "masm_tools.h" |
46 | |
69a3cdfc |
47 | enum op_flags { |
5e49b270 |
48 | OPF_RMD = (1 << 0), /* removed from code generation */ |
87bf6cec |
49 | OPF_DATA = (1 << 1), /* data processing - writes to dst opr */ |
50 | OPF_FLAGS = (1 << 2), /* sets flags */ |
5c024ef7 |
51 | OPF_JMP = (1 << 3), /* branch, call */ |
04abc5d6 |
52 | OPF_CJMP = (1 << 4), /* cond. branch (cc or jecxz/loop) */ |
5c024ef7 |
53 | OPF_CC = (1 << 5), /* uses flags */ |
54 | OPF_TAIL = (1 << 6), /* ret or tail call */ |
55 | OPF_RSAVE = (1 << 7), /* push/pop is local reg save/load */ |
56 | OPF_REP = (1 << 8), /* prefixed by rep */ |
57 | OPF_REPZ = (1 << 9), /* rep is repe/repz */ |
58 | OPF_REPNZ = (1 << 10), /* rep is repne/repnz */ |
9af2d373 |
59 | OPF_FARG = (1 << 11), /* push collected as func arg */ |
60 | OPF_FARGNR = (1 << 12), /* push collected as func arg (no reuse) */ |
61 | OPF_EBP_S = (1 << 13), /* ebp used as scratch here, not BP */ |
62 | OPF_DF = (1 << 14), /* DF flag set */ |
63 | OPF_ATAIL = (1 << 15), /* tail call with reused arg frame */ |
087ced53 |
64 | OPF_32BIT = (1 << 16), /* enough to do 32bit for this op */ |
9af2d373 |
65 | OPF_LOCK = (1 << 17), /* op has lock prefix */ |
66 | OPF_VAPUSH = (1 << 18), /* vararg ptr push (as call arg) */ |
26677139 |
67 | OPF_DONE = (1 << 19), /* already fully handled by analysis */ |
25a330eb |
68 | OPF_PPUSH = (1 << 20), /* part of complex push-pop graph */ |
b2bd20c0 |
69 | OPF_NOREGS = (1 << 21), /* don't track regs of this op */ |
d4a985bd |
70 | OPF_FPUSH = (1 << 22), /* pushes x87 stack */ |
71 | OPF_FPOP = (1 << 23), /* pops x87 stack */ |
88eed95d |
72 | OPF_FPOPP = (1 << 24), /* pops x87 stack twice */ |
73 | OPF_FSHIFT = (1 << 25), /* x87 stack shift is actually needed */ |
74 | OPF_FINT = (1 << 26), /* integer float op arg */ |
c36e914d |
75 | }; |
76 | |
77 | enum op_op { |
78 | OP_INVAL, |
33c35af6 |
79 | OP_NOP, |
c36e914d |
80 | OP_PUSH, |
81 | OP_POP, |
16057ce1 |
82 | OP_PUSHA, |
83 | OP_POPA, |
591721d7 |
84 | OP_LEAVE, |
c36e914d |
85 | OP_MOV, |
850c9265 |
86 | OP_LEA, |
87 | OP_MOVZX, |
88 | OP_MOVSX, |
108e9fe3 |
89 | OP_XCHG, |
850c9265 |
90 | OP_NOT, |
04abc5d6 |
91 | OP_XLAT, |
5101a5f9 |
92 | OP_CDQ, |
622eb2ef |
93 | OP_BSWAP, |
092f64e1 |
94 | OP_LODS, |
33c35af6 |
95 | OP_STOS, |
d4e3b5db |
96 | OP_MOVS, |
7ba45c34 |
97 | OP_CMPS, |
591721d7 |
98 | OP_SCAS, |
193c11bf |
99 | OP_RDTSC, |
100 | OP_CPUID, |
591721d7 |
101 | OP_STD, |
102 | OP_CLD, |
c36e914d |
103 | OP_RET, |
104 | OP_ADD, |
91977a1c |
105 | OP_SUB, |
850c9265 |
106 | OP_AND, |
107 | OP_OR, |
108 | OP_XOR, |
109 | OP_SHL, |
110 | OP_SHR, |
111 | OP_SAR, |
04abc5d6 |
112 | OP_SHLD, |
3b2f4044 |
113 | OP_SHRD, |
d4e3b5db |
114 | OP_ROL, |
115 | OP_ROR, |
cb090db0 |
116 | OP_RCL, |
117 | OP_RCR, |
69a3cdfc |
118 | OP_ADC, |
850c9265 |
119 | OP_SBB, |
1f84f6b3 |
120 | OP_BSF, |
f9327ad4 |
121 | OP_BSR, |
850c9265 |
122 | OP_INC, |
123 | OP_DEC, |
5101a5f9 |
124 | OP_NEG, |
850c9265 |
125 | OP_MUL, |
126 | OP_IMUL, |
5101a5f9 |
127 | OP_DIV, |
128 | OP_IDIV, |
c36e914d |
129 | OP_TEST, |
130 | OP_CMP, |
131 | OP_CALL, |
132 | OP_JMP, |
5c024ef7 |
133 | OP_JECXZ, |
04abc5d6 |
134 | OP_LOOP, |
092f64e1 |
135 | OP_JCC, |
136 | OP_SCC, |
d4a985bd |
137 | // x87 |
138 | OP_FLD, |
139 | OP_FILD, |
140 | OP_FLDc, |
141 | OP_FST, |
16057ce1 |
142 | OP_FIST, |
d4a985bd |
143 | OP_FADD, |
144 | OP_FDIV, |
145 | OP_FMUL, |
146 | OP_FSUB, |
147 | OP_FDIVR, |
148 | OP_FSUBR, |
149 | OP_FIADD, |
150 | OP_FIDIV, |
151 | OP_FIMUL, |
152 | OP_FISUB, |
153 | OP_FIDIVR, |
154 | OP_FISUBR, |
16057ce1 |
155 | OP_FCOM, |
156 | OP_FNSTSW, |
fe18df39 |
157 | OP_FCHS, |
497a6d6b |
158 | OP_FCOS, |
159 | OP_FPATAN, |
160 | OP_FPTAN, |
161 | OP_FSIN, |
162 | OP_FSQRT, |
fe18df39 |
163 | OP_FXCH, |
164 | OP_FYL2X, |
d4a985bd |
165 | // mmx |
166 | OP_EMMS, |
167 | // pseudo-ops for lib calls |
622eb2ef |
168 | OPP_ALLSHL, |
169 | OPP_ALLSHR, |
d4a985bd |
170 | OPP_FTOL, |
8c83cc48 |
171 | OPP_CIPOW, |
11437ea1 |
172 | OPP_ABORT, |
d4a985bd |
173 | // undefined |
174 | OP_UD2, |
c36e914d |
175 | }; |
176 | |
177 | enum opr_type { |
87bf6cec |
178 | OPT_UNSPEC, |
179 | OPT_REG, |
180 | OPT_REGMEM, |
181 | OPT_LABEL, |
850c9265 |
182 | OPT_OFFSET, |
87bf6cec |
183 | OPT_CONST, |
c36e914d |
184 | }; |
185 | |
2b43685d |
186 | // must be sorted (larger len must be further in enum) |
c36e914d |
187 | enum opr_lenmod { |
91977a1c |
188 | OPLM_UNSPEC, |
189 | OPLM_BYTE, |
190 | OPLM_WORD, |
191 | OPLM_DWORD, |
90307a99 |
192 | OPLM_QWORD, |
c36e914d |
193 | }; |
194 | |
e83ea7ed |
195 | #define MAX_EXITS 128 |
196 | |
850c9265 |
197 | #define MAX_OPERANDS 3 |
92d715b6 |
198 | #define NAMELEN 112 |
c36e914d |
199 | |
b2bd20c0 |
200 | #define OPR_INIT(type_, lmod_, reg_) \ |
201 | { type_, lmod_, reg_, } |
202 | |
c36e914d |
203 | struct parsed_opr { |
91977a1c |
204 | enum opr_type type; |
205 | enum opr_lenmod lmod; |
b2bd20c0 |
206 | int reg; |
7ba45c34 |
207 | unsigned int is_ptr:1; // pointer in C |
208 | unsigned int is_array:1; // array in C |
a3684be1 |
209 | unsigned int type_from_var:1; // .. in header, sometimes wrong |
2b43685d |
210 | unsigned int size_mismatch:1; // type override differs from C |
211 | unsigned int size_lt:1; // type override is larger than C |
ba93cc12 |
212 | unsigned int segment:7; // had segment override (enum segment) |
c7ed83dd |
213 | const struct parsed_proto *pp; // for OPT_LABEL |
91977a1c |
214 | unsigned int val; |
92d715b6 |
215 | char name[NAMELEN]; |
c36e914d |
216 | }; |
217 | |
218 | struct parsed_op { |
91977a1c |
219 | enum op_op op; |
220 | struct parsed_opr operand[MAX_OPERANDS]; |
69a3cdfc |
221 | unsigned int flags; |
092f64e1 |
222 | unsigned char pfo; |
223 | unsigned char pfo_inv; |
224 | unsigned char operand_cnt; |
3a5101d7 |
225 | unsigned char p_argnum; // arg push: altered before call arg # |
226 | unsigned char p_arggrp; // arg push: arg group # for above |
227 | unsigned char p_argpass;// arg push: arg of host func |
228 | short p_argnext;// arg push: same arg pushed elsewhere or -1 |
69a3cdfc |
229 | int regmask_src; // all referensed regs |
230 | int regmask_dst; |
940e8e66 |
231 | int pfomask; // flagop: parsed_flag_op that can't be delayed |
940e8e66 |
232 | int cc_scratch; // scratch storage during analysis |
4c45fa73 |
233 | int bt_i; // branch target for branches |
234 | struct parsed_data *btj;// branch targets for jumptables |
c7ed83dd |
235 | struct parsed_proto *pp;// parsed_proto for OP_CALL |
91977a1c |
236 | void *datap; |
8eb12e72 |
237 | int asmln; |
91977a1c |
238 | }; |
239 | |
69a3cdfc |
240 | // datap: |
865f1aca |
241 | // on start: function/data type hint (sctproto) |
242 | // after analysis: |
2c10ea1f |
243 | // (OPF_CC) - points to one of (OPF_FLAGS) that affects cc op |
25a330eb |
244 | // OP_PUSH - points to OP_POP in complex push/pop graph |
245 | // OP_POP - points to OP_PUSH in simple push/pop pair |
16057ce1 |
246 | // OP_FCOM - needed_status_word_bits | (is_z_check << 16) |
69a3cdfc |
247 | |
91977a1c |
248 | struct parsed_equ { |
249 | char name[64]; |
250 | enum opr_lenmod lmod; |
251 | int offset; |
c36e914d |
252 | }; |
253 | |
4c45fa73 |
254 | struct parsed_data { |
255 | char label[256]; |
256 | enum opr_type type; |
257 | enum opr_lenmod lmod; |
258 | int count; |
259 | int count_alloc; |
260 | struct { |
261 | union { |
262 | char *label; |
63df67be |
263 | unsigned int val; |
4c45fa73 |
264 | } u; |
265 | int bt_i; |
266 | } *d; |
267 | }; |
268 | |
269 | struct label_ref { |
270 | int i; |
271 | struct label_ref *next; |
272 | }; |
273 | |
1bafb621 |
274 | enum ida_func_attr { |
275 | IDAFA_BP_FRAME = (1 << 0), |
276 | IDAFA_LIB_FUNC = (1 << 1), |
277 | IDAFA_STATIC = (1 << 2), |
278 | IDAFA_NORETURN = (1 << 3), |
279 | IDAFA_THUNK = (1 << 4), |
280 | IDAFA_FPD = (1 << 5), |
281 | }; |
282 | |
427da1c9 |
283 | // sctattr |
7e08c224 |
284 | enum sct_func_attr { |
226e8df1 |
285 | SCTFA_CLEAR_SF = (1 << 0), // clear stack frame |
286 | SCTFA_CLEAR_REGS = (1 << 1), // clear registers (mask) |
193c11bf |
287 | SCTFA_RM_REGS = (1 << 2), // don't emit regs (mask) |
427da1c9 |
288 | SCTFA_NOWARN = (1 << 3), // don't try to detect problems |
193c11bf |
289 | SCTFA_ARGFRAME = (1 << 4), // copy all args to a struct, in order |
7e08c224 |
290 | }; |
291 | |
d4a985bd |
292 | enum x87_const { |
293 | X87_CONST_1 = 1, |
b62264bc |
294 | X87_CONST_L2T, |
295 | X87_CONST_L2E, |
d4a985bd |
296 | X87_CONST_PI, |
297 | X87_CONST_LG2, |
298 | X87_CONST_LN2, |
299 | X87_CONST_Z, |
300 | }; |
301 | |
ba93cc12 |
302 | enum segment { |
303 | SEG_CS = 1, |
304 | SEG_DS, |
305 | SEG_SS, |
306 | SEG_ES, |
307 | SEG_FS, |
308 | SEG_GS, |
309 | }; |
310 | |
3a5101d7 |
311 | // note: limited to 32k due to p_argnext |
312 | #define MAX_OPS 4096 |
313 | #define MAX_ARG_GRP 2 |
c36e914d |
314 | |
315 | static struct parsed_op ops[MAX_OPS]; |
91977a1c |
316 | static struct parsed_equ *g_eqs; |
317 | static int g_eqcnt; |
d7857c3a |
318 | static char *g_labels[MAX_OPS]; |
4c45fa73 |
319 | static struct label_ref g_label_refs[MAX_OPS]; |
bd96f656 |
320 | static const struct parsed_proto *g_func_pp; |
4c45fa73 |
321 | static struct parsed_data *g_func_pd; |
322 | static int g_func_pd_cnt; |
d4a985bd |
323 | static int g_func_lmods; |
91977a1c |
324 | static char g_func[256]; |
325 | static char g_comment[256]; |
326 | static int g_bp_frame; |
1bafb621 |
327 | static int g_sp_frame; |
a2c1d768 |
328 | static int g_stack_frame_used; |
1bafb621 |
329 | static int g_stack_fsz; |
ba93cc12 |
330 | static int g_seh_found; |
331 | static int g_seh_size; |
4c45fa73 |
332 | static int g_ida_func_attr; |
7e08c224 |
333 | static int g_sct_func_attr; |
334 | static int g_stack_clear_start; // in dwords |
335 | static int g_stack_clear_len; |
226e8df1 |
336 | static int g_regmask_init; |
383dff16 |
337 | static int g_regmask_rm; |
30c8c549 |
338 | static int g_skip_func; |
89ff3147 |
339 | static int g_allow_regfunc; |
8c83cc48 |
340 | static int g_allow_user_icall; |
615dbae1 |
341 | static int g_nowarn_reguse; |
92d715b6 |
342 | static int g_quiet_pp; |
9af2d373 |
343 | static int g_header_mode; |
92d715b6 |
344 | |
91977a1c |
345 | #define ferr(op_, fmt, ...) do { \ |
bfacdc83 |
346 | printf("%s:%d: error %u: [%s] '%s': " fmt, asmfn, (op_)->asmln, \ |
347 | __LINE__, g_func, dump_op(op_), ##__VA_ARGS__); \ |
33c35af6 |
348 | fcloseall(); \ |
91977a1c |
349 | exit(1); \ |
350 | } while (0) |
de50b98b |
351 | #define fnote(op_, fmt, ...) \ |
8eb12e72 |
352 | printf("%s:%d: note: [%s] '%s': " fmt, asmfn, (op_)->asmln, g_func, \ |
de50b98b |
353 | dump_op(op_), ##__VA_ARGS__) |
91977a1c |
354 | |
26677139 |
355 | #define ferr_assert(op_, cond) do { \ |
2b70f6d3 |
356 | if (!(cond)) ferr(op_, "assertion '%s' failed\n", #cond); \ |
26677139 |
357 | } while (0) |
358 | |
427da1c9 |
359 | #define IS_OP_INDIRECT_CALL(op_) \ |
360 | ((op_)->op == OP_CALL && (op_)->operand[0].type != OPT_LABEL) |
361 | |
90307a99 |
362 | const char *regs_r32[] = { |
363 | "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp", |
364 | // not r32, but list here for easy parsing and printing |
365 | "mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7", |
d4a985bd |
366 | "st", "st(1)", "st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)" |
90307a99 |
367 | }; |
91977a1c |
368 | const char *regs_r16[] = { "ax", "bx", "cx", "dx", "si", "di", "bp", "sp" }; |
369 | const char *regs_r8l[] = { "al", "bl", "cl", "dl" }; |
370 | const char *regs_r8h[] = { "ah", "bh", "ch", "dh" }; |
371 | |
d4a985bd |
372 | enum x86_regs { |
373 | xUNSPEC = -1, |
374 | xAX, xBX, xCX, xDX, |
375 | xSI, xDI, xBP, xSP, |
376 | xMM0, xMM1, xMM2, xMM3, // mmx |
377 | xMM4, xMM5, xMM6, xMM7, |
378 | xST0, xST1, xST2, xST3, // x87 |
379 | xST4, xST5, xST6, xST7, |
380 | }; |
381 | |
382 | #define mxAX (1 << xAX) |
193c11bf |
383 | #define mxBX (1 << xBX) |
226e8df1 |
384 | #define mxCX (1 << xCX) |
d4a985bd |
385 | #define mxDX (1 << xDX) |
f9327ad4 |
386 | #define mxSP (1 << xSP) |
d4a985bd |
387 | #define mxST0 (1 << xST0) |
388 | #define mxST1 (1 << xST1) |
fe18df39 |
389 | #define mxST1_0 (mxST1 | mxST0) |
390 | #define mxST7_2 (0xfc << xST0) |
391 | #define mxSTa (0xff << xST0) |
91977a1c |
392 | |
69a3cdfc |
393 | // possible basic comparison types (without inversion) |
394 | enum parsed_flag_op { |
395 | PFO_O, // 0 OF=1 |
396 | PFO_C, // 2 CF=1 |
397 | PFO_Z, // 4 ZF=1 |
398 | PFO_BE, // 6 CF=1||ZF=1 |
399 | PFO_S, // 8 SF=1 |
400 | PFO_P, // a PF=1 |
401 | PFO_L, // c SF!=OF |
402 | PFO_LE, // e ZF=1||SF!=OF |
403 | }; |
404 | |
90307a99 |
405 | #define PFOB_O (1 << PFO_O) |
406 | #define PFOB_C (1 << PFO_C) |
407 | #define PFOB_Z (1 << PFO_Z) |
408 | #define PFOB_S (1 << PFO_S) |
409 | |
69a3cdfc |
410 | static const char *parsed_flag_op_names[] = { |
411 | "o", "c", "z", "be", "s", "p", "l", "le" |
412 | }; |
413 | |
91977a1c |
414 | static int char_array_i(const char *array[], size_t len, const char *s) |
415 | { |
416 | int i; |
c36e914d |
417 | |
91977a1c |
418 | for (i = 0; i < len; i++) |
419 | if (IS(s, array[i])) |
420 | return i; |
c36e914d |
421 | |
91977a1c |
422 | return -1; |
423 | } |
424 | |
63df67be |
425 | static void printf_number(char *buf, size_t buf_size, |
426 | unsigned long number) |
91977a1c |
427 | { |
5101a5f9 |
428 | // output in C-friendly form |
429 | snprintf(buf, buf_size, number < 10 ? "%lu" : "0x%02lx", number); |
430 | } |
91977a1c |
431 | |
fdd5548a |
432 | static int check_segment_prefix(const char *s) |
433 | { |
434 | if (s[0] == 0 || s[1] != 's' || s[2] != ':') |
435 | return 0; |
436 | |
437 | switch (s[0]) { |
ba93cc12 |
438 | case 'c': return SEG_CS; |
439 | case 'd': return SEG_DS; |
440 | case 's': return SEG_SS; |
441 | case 'e': return SEG_ES; |
442 | case 'f': return SEG_FS; |
443 | case 'g': return SEG_GS; |
fdd5548a |
444 | default: return 0; |
445 | } |
446 | } |
447 | |
5101a5f9 |
448 | static int parse_reg(enum opr_lenmod *reg_lmod, const char *s) |
449 | { |
450 | int reg; |
91977a1c |
451 | |
5101a5f9 |
452 | reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s); |
90307a99 |
453 | if (reg >= 8) { |
454 | *reg_lmod = OPLM_QWORD; |
455 | return reg; |
456 | } |
5101a5f9 |
457 | if (reg >= 0) { |
458 | *reg_lmod = OPLM_DWORD; |
459 | return reg; |
91977a1c |
460 | } |
5101a5f9 |
461 | reg = char_array_i(regs_r16, ARRAY_SIZE(regs_r16), s); |
462 | if (reg >= 0) { |
463 | *reg_lmod = OPLM_WORD; |
464 | return reg; |
465 | } |
466 | reg = char_array_i(regs_r8h, ARRAY_SIZE(regs_r8h), s); |
467 | if (reg >= 0) { |
468 | *reg_lmod = OPLM_BYTE; |
469 | return reg; |
470 | } |
471 | reg = char_array_i(regs_r8l, ARRAY_SIZE(regs_r8l), s); |
472 | if (reg >= 0) { |
473 | *reg_lmod = OPLM_BYTE; |
474 | return reg; |
850c9265 |
475 | } |
476 | |
477 | return -1; |
91977a1c |
478 | } |
479 | |
5101a5f9 |
480 | static int parse_indmode(char *name, int *regmask, int need_c_cvt) |
481 | { |
482 | enum opr_lenmod lmod; |
483 | char cvtbuf[256]; |
484 | char *d = cvtbuf; |
485 | char *s = name; |
486 | char w[64]; |
487 | long number; |
488 | int reg; |
489 | int c = 0; |
490 | |
491 | *d = 0; |
492 | |
493 | while (*s != 0) { |
494 | d += strlen(d); |
495 | while (my_isblank(*s)) |
496 | s++; |
497 | for (; my_issep(*s); d++, s++) |
498 | *d = *s; |
499 | while (my_isblank(*s)) |
500 | s++; |
501 | *d = 0; |
502 | |
fdd5548a |
503 | // skip '?s:' prefixes |
504 | if (check_segment_prefix(s)) |
87bf6cec |
505 | s += 3; |
506 | |
5101a5f9 |
507 | s = next_idt(w, sizeof(w), s); |
508 | if (w[0] == 0) |
509 | break; |
510 | c++; |
511 | |
512 | reg = parse_reg(&lmod, w); |
513 | if (reg >= 0) { |
514 | *regmask |= 1 << reg; |
515 | goto pass; |
516 | } |
517 | |
518 | if ('0' <= w[0] && w[0] <= '9') { |
e27467d0 |
519 | number = parse_number(w, 0); |
5101a5f9 |
520 | printf_number(d, sizeof(cvtbuf) - (d - cvtbuf), number); |
521 | continue; |
522 | } |
523 | |
524 | // probably some label/identifier - pass |
525 | |
526 | pass: |
527 | snprintf(d, sizeof(cvtbuf) - (d - cvtbuf), "%s", w); |
528 | } |
529 | |
530 | if (need_c_cvt) |
531 | strcpy(name, cvtbuf); |
532 | |
533 | return c; |
534 | } |
535 | |
4c45fa73 |
536 | static int is_reg_in_str(const char *s) |
537 | { |
538 | int i; |
539 | |
540 | if (strlen(s) < 3 || (s[3] && !my_issep(s[3]) && !my_isblank(s[3]))) |
541 | return 0; |
542 | |
543 | for (i = 0; i < ARRAY_SIZE(regs_r32); i++) |
544 | if (!strncmp(s, regs_r32[i], 3)) |
545 | return 1; |
546 | |
547 | return 0; |
548 | } |
549 | |
09bc6fd5 |
550 | static const char *parse_stack_el(const char *name, char *extra_reg, |
30620174 |
551 | int *base_val, int early_try) |
d4e3b5db |
552 | { |
4c45fa73 |
553 | const char *p, *p2, *s; |
1bafb621 |
554 | char *endp = NULL; |
d4e3b5db |
555 | char buf[32]; |
30620174 |
556 | long val = -1; |
d4e3b5db |
557 | int len; |
558 | |
09bc6fd5 |
559 | if (g_bp_frame || early_try) |
560 | { |
561 | p = name; |
562 | if (IS_START(p + 3, "+ebp+") && is_reg_in_str(p)) { |
563 | p += 4; |
564 | if (extra_reg != NULL) { |
565 | strncpy(extra_reg, name, 3); |
566 | extra_reg[4] = 0; |
567 | } |
4c45fa73 |
568 | } |
4c45fa73 |
569 | |
09bc6fd5 |
570 | if (IS_START(p, "ebp+")) { |
571 | p += 4; |
4c45fa73 |
572 | |
09bc6fd5 |
573 | p2 = strchr(p, '+'); |
574 | if (p2 != NULL && is_reg_in_str(p)) { |
575 | if (extra_reg != NULL) { |
576 | strncpy(extra_reg, p, p2 - p); |
577 | extra_reg[p2 - p] = 0; |
578 | } |
579 | p = p2 + 1; |
4c45fa73 |
580 | } |
4c45fa73 |
581 | |
09bc6fd5 |
582 | if (!('0' <= *p && *p <= '9')) |
583 | return p; |
4c45fa73 |
584 | |
09bc6fd5 |
585 | return NULL; |
586 | } |
4c45fa73 |
587 | } |
588 | |
39b168b8 |
589 | if (!IS_START(name, "esp+")) |
d4e3b5db |
590 | return NULL; |
591 | |
037f4971 |
592 | s = name + 4; |
593 | p = strchr(s, '+'); |
d4e3b5db |
594 | if (p) { |
037f4971 |
595 | if (is_reg_in_str(s)) { |
596 | if (extra_reg != NULL) { |
597 | strncpy(extra_reg, s, p - s); |
598 | extra_reg[p - s] = 0; |
599 | } |
600 | s = p + 1; |
601 | p = strchr(s, '+'); |
602 | if (p == NULL) |
603 | aerr("%s IDA stackvar not set?\n", __func__); |
604 | } |
354f5504 |
605 | if ('0' <= *s && *s <= '9') { |
606 | if (s[0] == '0' && s[1] == 'x') |
607 | s += 2; |
608 | len = p - s; |
609 | if (len < sizeof(buf) - 1) { |
610 | strncpy(buf, s, len); |
611 | buf[len] = 0; |
612 | errno = 0; |
613 | val = strtol(buf, &endp, 16); |
614 | if (val == 0 || *endp != 0 || errno != 0) { |
615 | aerr("%s num parse fail for '%s'\n", __func__, buf); |
616 | return NULL; |
617 | } |
1bafb621 |
618 | } |
354f5504 |
619 | p++; |
620 | } |
621 | else { |
622 | // probably something like [esp+arg_4+2] |
623 | p = s; |
624 | val = 0; |
d4e3b5db |
625 | } |
d4e3b5db |
626 | } |
627 | else |
628 | p = name + 4; |
629 | |
630 | if ('0' <= *p && *p <= '9') |
631 | return NULL; |
632 | |
30620174 |
633 | if (base_val != NULL) |
634 | *base_val = val; |
d4e3b5db |
635 | return p; |
636 | } |
637 | |
850c9265 |
638 | static int guess_lmod_from_name(struct parsed_opr *opr) |
639 | { |
04abc5d6 |
640 | if (IS_START(opr->name, "dword_") || IS_START(opr->name, "off_")) { |
850c9265 |
641 | opr->lmod = OPLM_DWORD; |
642 | return 1; |
643 | } |
04abc5d6 |
644 | if (IS_START(opr->name, "word_")) { |
850c9265 |
645 | opr->lmod = OPLM_WORD; |
646 | return 1; |
647 | } |
04abc5d6 |
648 | if (IS_START(opr->name, "byte_")) { |
850c9265 |
649 | opr->lmod = OPLM_BYTE; |
650 | return 1; |
651 | } |
04abc5d6 |
652 | if (IS_START(opr->name, "qword_")) { |
90307a99 |
653 | opr->lmod = OPLM_QWORD; |
654 | return 1; |
655 | } |
850c9265 |
656 | return 0; |
657 | } |
658 | |
3ebea2cf |
659 | static int guess_lmod_from_c_type(enum opr_lenmod *lmod, |
660 | const struct parsed_type *c_type) |
06c5d854 |
661 | { |
11437ea1 |
662 | static const char *qword_types[] = { |
663 | "uint64_t", "int64_t", "__int64", |
664 | }; |
06c5d854 |
665 | static const char *dword_types[] = { |
c0de9015 |
666 | "uint32_t", "int", "_DWORD", "UINT_PTR", "DWORD", |
4741fdfe |
667 | "WPARAM", "LPARAM", "UINT", "__int32", |
09bc6fd5 |
668 | "LONG", "HIMC", "BOOL", "size_t", |
feb0ee5d |
669 | "float", |
06c5d854 |
670 | }; |
671 | static const char *word_types[] = { |
fe18709a |
672 | "uint16_t", "int16_t", "_WORD", "WORD", |
2b43685d |
673 | "unsigned __int16", "__int16", |
06c5d854 |
674 | }; |
675 | static const char *byte_types[] = { |
2b43685d |
676 | "uint8_t", "int8_t", "char", |
89ff3147 |
677 | "unsigned __int8", "__int8", "BYTE", "_BYTE", |
4741fdfe |
678 | "CHAR", "_UNKNOWN", |
b4878d2b |
679 | // structures.. deal the same as with _UNKNOWN for now |
680 | "CRITICAL_SECTION", |
06c5d854 |
681 | }; |
3ebea2cf |
682 | const char *n; |
06c5d854 |
683 | int i; |
684 | |
3ebea2cf |
685 | if (c_type->is_ptr) { |
686 | *lmod = OPLM_DWORD; |
06c5d854 |
687 | return 1; |
688 | } |
689 | |
3ebea2cf |
690 | n = skip_type_mod(c_type->name); |
06c5d854 |
691 | |
3ebea2cf |
692 | for (i = 0; i < ARRAY_SIZE(dword_types); i++) { |
693 | if (IS(n, dword_types[i])) { |
694 | *lmod = OPLM_DWORD; |
06c5d854 |
695 | return 1; |
696 | } |
697 | } |
698 | |
699 | for (i = 0; i < ARRAY_SIZE(word_types); i++) { |
3ebea2cf |
700 | if (IS(n, word_types[i])) { |
701 | *lmod = OPLM_WORD; |
06c5d854 |
702 | return 1; |
703 | } |
704 | } |
705 | |
706 | for (i = 0; i < ARRAY_SIZE(byte_types); i++) { |
3ebea2cf |
707 | if (IS(n, byte_types[i])) { |
708 | *lmod = OPLM_BYTE; |
06c5d854 |
709 | return 1; |
710 | } |
711 | } |
712 | |
11437ea1 |
713 | for (i = 0; i < ARRAY_SIZE(qword_types); i++) { |
714 | if (IS(n, qword_types[i])) { |
715 | *lmod = OPLM_QWORD; |
716 | return 1; |
717 | } |
718 | } |
719 | |
06c5d854 |
720 | return 0; |
721 | } |
722 | |
c7ed83dd |
723 | static char *default_cast_to(char *buf, size_t buf_size, |
724 | struct parsed_opr *opr) |
725 | { |
726 | buf[0] = 0; |
727 | |
865f1aca |
728 | if (!opr->is_ptr || strchr(opr->name, '[')) |
c7ed83dd |
729 | return buf; |
730 | if (opr->pp == NULL || opr->pp->type.name == NULL |
731 | || opr->pp->is_fptr) |
732 | { |
733 | snprintf(buf, buf_size, "%s", "(void *)"); |
734 | return buf; |
735 | } |
736 | |
737 | snprintf(buf, buf_size, "(%s)", opr->pp->type.name); |
738 | return buf; |
739 | } |
740 | |
4c45fa73 |
741 | static enum opr_type lmod_from_directive(const char *d) |
742 | { |
743 | if (IS(d, "dd")) |
744 | return OPLM_DWORD; |
745 | else if (IS(d, "dw")) |
746 | return OPLM_WORD; |
747 | else if (IS(d, "db")) |
748 | return OPLM_BYTE; |
749 | |
750 | aerr("unhandled directive: '%s'\n", d); |
751 | return OPLM_UNSPEC; |
752 | } |
753 | |
5101a5f9 |
754 | static void setup_reg_opr(struct parsed_opr *opr, int reg, enum opr_lenmod lmod, |
755 | int *regmask) |
756 | { |
757 | opr->type = OPT_REG; |
758 | opr->reg = reg; |
759 | opr->lmod = lmod; |
760 | *regmask |= 1 << reg; |
761 | } |
762 | |
39b168b8 |
763 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
764 | int *extra_offs); |
87bf6cec |
765 | |
69a3cdfc |
766 | static int parse_operand(struct parsed_opr *opr, |
767 | int *regmask, int *regmask_indirect, |
1bafb621 |
768 | char words[16][256], int wordc, int w, unsigned int op_flags) |
c36e914d |
769 | { |
92d715b6 |
770 | const struct parsed_proto *pp = NULL; |
850c9265 |
771 | enum opr_lenmod tmplmod; |
63df67be |
772 | unsigned long number; |
89ff3147 |
773 | char buf[256]; |
850c9265 |
774 | int ret, len; |
1bafb621 |
775 | int wordc_in; |
89ff3147 |
776 | char *p; |
850c9265 |
777 | int i; |
c36e914d |
778 | |
1bafb621 |
779 | if (w >= wordc) |
780 | aerr("parse_operand w %d, wordc %d\n", w, wordc); |
c36e914d |
781 | |
1bafb621 |
782 | opr->reg = xUNSPEC; |
91977a1c |
783 | |
1bafb621 |
784 | for (i = w; i < wordc; i++) { |
785 | len = strlen(words[i]); |
786 | if (words[i][len - 1] == ',') { |
787 | words[i][len - 1] = 0; |
788 | wordc = i + 1; |
789 | break; |
790 | } |
791 | } |
c36e914d |
792 | |
1bafb621 |
793 | wordc_in = wordc - w; |
c36e914d |
794 | |
1bafb621 |
795 | if ((op_flags & OPF_JMP) && wordc_in > 0 |
796 | && !('0' <= words[w][0] && words[w][0] <= '9')) |
797 | { |
798 | const char *label = NULL; |
799 | |
800 | if (wordc_in == 3 && !strncmp(words[w], "near", 4) |
801 | && IS(words[w + 1], "ptr")) |
802 | label = words[w + 2]; |
803 | else if (wordc_in == 2 && IS(words[w], "short")) |
804 | label = words[w + 1]; |
805 | else if (wordc_in == 1 |
806 | && strchr(words[w], '[') == NULL |
807 | && parse_reg(&tmplmod, words[w]) < 0) |
808 | label = words[w]; |
809 | |
810 | if (label != NULL) { |
811 | opr->type = OPT_LABEL; |
fdd5548a |
812 | ret = check_segment_prefix(label); |
813 | if (ret != 0) { |
ba93cc12 |
814 | opr->segment = ret; |
39b168b8 |
815 | label += 3; |
ddaf8bd7 |
816 | } |
1bafb621 |
817 | strcpy(opr->name, label); |
818 | return wordc; |
819 | } |
820 | } |
c36e914d |
821 | |
1bafb621 |
822 | if (wordc_in >= 3) { |
823 | if (IS(words[w + 1], "ptr")) { |
824 | if (IS(words[w], "dword")) |
825 | opr->lmod = OPLM_DWORD; |
826 | else if (IS(words[w], "word")) |
827 | opr->lmod = OPLM_WORD; |
828 | else if (IS(words[w], "byte")) |
829 | opr->lmod = OPLM_BYTE; |
90307a99 |
830 | else if (IS(words[w], "qword")) |
831 | opr->lmod = OPLM_QWORD; |
1bafb621 |
832 | else |
833 | aerr("type parsing failed\n"); |
834 | w += 2; |
835 | wordc_in = wordc - w; |
836 | } |
837 | } |
838 | |
39b168b8 |
839 | if (wordc_in == 2) { |
840 | if (IS(words[w], "offset")) { |
841 | opr->type = OPT_OFFSET; |
27ebfaed |
842 | opr->lmod = OPLM_DWORD; |
39b168b8 |
843 | strcpy(opr->name, words[w + 1]); |
27ebfaed |
844 | pp = proto_parse(g_fhdr, opr->name, 1); |
845 | goto do_label; |
39b168b8 |
846 | } |
847 | if (IS(words[w], "(offset")) { |
89ff3147 |
848 | p = strchr(words[w + 1], ')'); |
39b168b8 |
849 | if (p == NULL) |
850 | aerr("parse of bracketed offset failed\n"); |
851 | *p = 0; |
852 | opr->type = OPT_OFFSET; |
853 | strcpy(opr->name, words[w + 1]); |
854 | return wordc; |
855 | } |
1bafb621 |
856 | } |
c36e914d |
857 | |
1bafb621 |
858 | if (wordc_in != 1) |
850c9265 |
859 | aerr("parse_operand 1 word expected\n"); |
c36e914d |
860 | |
fdd5548a |
861 | ret = check_segment_prefix(words[w]); |
862 | if (ret != 0) { |
ba93cc12 |
863 | opr->segment = ret; |
89ff3147 |
864 | memmove(words[w], words[w] + 3, strlen(words[w]) - 2); |
ba93cc12 |
865 | if (ret == SEG_FS && IS(words[w], "0")) |
866 | g_seh_found = 1; |
ddaf8bd7 |
867 | } |
89ff3147 |
868 | strcpy(opr->name, words[w]); |
c36e914d |
869 | |
850c9265 |
870 | if (words[w][0] == '[') { |
871 | opr->type = OPT_REGMEM; |
872 | ret = sscanf(words[w], "[%[^]]]", opr->name); |
873 | if (ret != 1) |
874 | aerr("[] parse failure\n"); |
87bf6cec |
875 | |
5101a5f9 |
876 | parse_indmode(opr->name, regmask_indirect, 1); |
30620174 |
877 | if (opr->lmod == OPLM_UNSPEC |
878 | && parse_stack_el(opr->name, NULL, NULL, 1)) |
09bc6fd5 |
879 | { |
87bf6cec |
880 | // might be an equ |
d4e3b5db |
881 | struct parsed_equ *eq = |
30620174 |
882 | equ_find(NULL, parse_stack_el(opr->name, NULL, NULL, 1), &i); |
87bf6cec |
883 | if (eq) |
884 | opr->lmod = eq->lmod; |
d4a985bd |
885 | |
886 | // might be unaligned access |
887 | g_func_lmods |= 1 << OPLM_BYTE; |
87bf6cec |
888 | } |
850c9265 |
889 | return wordc; |
890 | } |
891 | else if (strchr(words[w], '[')) { |
892 | // label[reg] form |
89ff3147 |
893 | p = strchr(words[w], '['); |
850c9265 |
894 | opr->type = OPT_REGMEM; |
89ff3147 |
895 | parse_indmode(p, regmask_indirect, 0); |
896 | strncpy(buf, words[w], p - words[w]); |
897 | buf[p - words[w]] = 0; |
898 | pp = proto_parse(g_fhdr, buf, 1); |
899 | goto do_label; |
850c9265 |
900 | } |
901 | else if (('0' <= words[w][0] && words[w][0] <= '9') |
902 | || words[w][0] == '-') |
903 | { |
e27467d0 |
904 | number = parse_number(words[w], 0); |
91977a1c |
905 | opr->type = OPT_CONST; |
5101a5f9 |
906 | opr->val = number; |
907 | printf_number(opr->name, sizeof(opr->name), number); |
91977a1c |
908 | return wordc; |
850c9265 |
909 | } |
c36e914d |
910 | |
5101a5f9 |
911 | ret = parse_reg(&tmplmod, opr->name); |
912 | if (ret >= 0) { |
913 | setup_reg_opr(opr, ret, tmplmod, regmask); |
850c9265 |
914 | return wordc; |
915 | } |
916 | |
917 | // most likely var in data segment |
918 | opr->type = OPT_LABEL; |
92d715b6 |
919 | pp = proto_parse(g_fhdr, opr->name, g_quiet_pp); |
89ff3147 |
920 | |
921 | do_label: |
bd96f656 |
922 | if (pp != NULL) { |
1cd4a663 |
923 | if (pp->is_fptr || pp->is_func) { |
06c5d854 |
924 | opr->lmod = OPLM_DWORD; |
925 | opr->is_ptr = 1; |
926 | } |
2b43685d |
927 | else { |
840257f6 |
928 | tmplmod = OPLM_UNSPEC; |
bd96f656 |
929 | if (!guess_lmod_from_c_type(&tmplmod, &pp->type)) |
2b43685d |
930 | anote("unhandled C type '%s' for '%s'\n", |
bd96f656 |
931 | pp->type.name, opr->name); |
2b43685d |
932 | |
a3684be1 |
933 | if (opr->lmod == OPLM_UNSPEC) { |
2b43685d |
934 | opr->lmod = tmplmod; |
a3684be1 |
935 | opr->type_from_var = 1; |
936 | } |
2b43685d |
937 | else if (opr->lmod != tmplmod) { |
938 | opr->size_mismatch = 1; |
939 | if (tmplmod < opr->lmod) |
940 | opr->size_lt = 1; |
941 | } |
a652aa9f |
942 | opr->is_ptr = pp->type.is_ptr; |
3ebea2cf |
943 | } |
bd96f656 |
944 | opr->is_array = pp->type.is_array; |
06c5d854 |
945 | } |
c7ed83dd |
946 | opr->pp = pp; |
06c5d854 |
947 | |
850c9265 |
948 | if (opr->lmod == OPLM_UNSPEC) |
949 | guess_lmod_from_name(opr); |
850c9265 |
950 | return wordc; |
c36e914d |
951 | } |
952 | |
33c35af6 |
953 | static const struct { |
954 | const char *name; |
955 | unsigned int flags; |
956 | } pref_table[] = { |
957 | { "rep", OPF_REP }, |
7ba45c34 |
958 | { "repe", OPF_REP|OPF_REPZ }, |
959 | { "repz", OPF_REP|OPF_REPZ }, |
960 | { "repne", OPF_REP|OPF_REPNZ }, |
961 | { "repnz", OPF_REP|OPF_REPNZ }, |
193c11bf |
962 | { "lock", OPF_LOCK }, |
33c35af6 |
963 | }; |
964 | |
5c024ef7 |
965 | #define OPF_CJMP_CC (OPF_JMP|OPF_CJMP|OPF_CC) |
966 | |
c36e914d |
967 | static const struct { |
850c9265 |
968 | const char *name; |
969 | enum op_op op; |
092f64e1 |
970 | unsigned short minopr; |
971 | unsigned short maxopr; |
69a3cdfc |
972 | unsigned int flags; |
092f64e1 |
973 | unsigned char pfo; |
974 | unsigned char pfo_inv; |
c36e914d |
975 | } op_table[] = { |
33c35af6 |
976 | { "nop", OP_NOP, 0, 0, 0 }, |
69a3cdfc |
977 | { "push", OP_PUSH, 1, 1, 0 }, |
978 | { "pop", OP_POP, 1, 1, OPF_DATA }, |
16057ce1 |
979 | { "pusha",OP_PUSHA, 0, 0, 0 }, |
980 | { "popa", OP_POPA, 0, 0, OPF_DATA }, |
591721d7 |
981 | { "leave",OP_LEAVE, 0, 0, OPF_DATA }, |
69a3cdfc |
982 | { "mov" , OP_MOV, 2, 2, OPF_DATA }, |
983 | { "lea", OP_LEA, 2, 2, OPF_DATA }, |
984 | { "movzx",OP_MOVZX, 2, 2, OPF_DATA }, |
985 | { "movsx",OP_MOVSX, 2, 2, OPF_DATA }, |
108e9fe3 |
986 | { "xchg", OP_XCHG, 2, 2, OPF_DATA }, |
69a3cdfc |
987 | { "not", OP_NOT, 1, 1, OPF_DATA }, |
04abc5d6 |
988 | { "xlat", OP_XLAT, 0, 0, OPF_DATA }, |
5101a5f9 |
989 | { "cdq", OP_CDQ, 0, 0, OPF_DATA }, |
622eb2ef |
990 | { "bswap",OP_BSWAP, 1, 1, OPF_DATA }, |
092f64e1 |
991 | { "lodsb",OP_LODS, 0, 0, OPF_DATA }, |
992 | { "lodsw",OP_LODS, 0, 0, OPF_DATA }, |
993 | { "lodsd",OP_LODS, 0, 0, OPF_DATA }, |
33c35af6 |
994 | { "stosb",OP_STOS, 0, 0, OPF_DATA }, |
995 | { "stosw",OP_STOS, 0, 0, OPF_DATA }, |
996 | { "stosd",OP_STOS, 0, 0, OPF_DATA }, |
d4e3b5db |
997 | { "movsb",OP_MOVS, 0, 0, OPF_DATA }, |
998 | { "movsw",OP_MOVS, 0, 0, OPF_DATA }, |
999 | { "movsd",OP_MOVS, 0, 0, OPF_DATA }, |
7ba45c34 |
1000 | { "cmpsb",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
1001 | { "cmpsw",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
1002 | { "cmpsd",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
591721d7 |
1003 | { "scasb",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
1004 | { "scasw",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
1005 | { "scasd",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
193c11bf |
1006 | { "rdtsc",OP_RDTSC, 0, 0, OPF_DATA }, |
1007 | { "cpuid",OP_CPUID, 0, 0, OPF_DATA }, |
591721d7 |
1008 | { "std", OP_STD, 0, 0, OPF_DATA }, // special flag |
1009 | { "cld", OP_CLD, 0, 0, OPF_DATA }, |
69a3cdfc |
1010 | { "add", OP_ADD, 2, 2, OPF_DATA|OPF_FLAGS }, |
1011 | { "sub", OP_SUB, 2, 2, OPF_DATA|OPF_FLAGS }, |
1012 | { "and", OP_AND, 2, 2, OPF_DATA|OPF_FLAGS }, |
1013 | { "or", OP_OR, 2, 2, OPF_DATA|OPF_FLAGS }, |
1014 | { "xor", OP_XOR, 2, 2, OPF_DATA|OPF_FLAGS }, |
1015 | { "shl", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
1016 | { "shr", OP_SHR, 2, 2, OPF_DATA|OPF_FLAGS }, |
1017 | { "sal", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
1018 | { "sar", OP_SAR, 2, 2, OPF_DATA|OPF_FLAGS }, |
04abc5d6 |
1019 | { "shld", OP_SHLD, 3, 3, OPF_DATA|OPF_FLAGS }, |
3b2f4044 |
1020 | { "shrd", OP_SHRD, 3, 3, OPF_DATA|OPF_FLAGS }, |
d4e3b5db |
1021 | { "rol", OP_ROL, 2, 2, OPF_DATA|OPF_FLAGS }, |
1022 | { "ror", OP_ROR, 2, 2, OPF_DATA|OPF_FLAGS }, |
092f64e1 |
1023 | { "rcl", OP_RCL, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
1024 | { "rcr", OP_RCR, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
1025 | { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
1026 | { "sbb", OP_SBB, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
1f84f6b3 |
1027 | { "bsf", OP_BSF, 2, 2, OPF_DATA|OPF_FLAGS }, |
f9327ad4 |
1028 | { "bsr", OP_BSR, 2, 2, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
1029 | { "inc", OP_INC, 1, 1, OPF_DATA|OPF_FLAGS }, |
1030 | { "dec", OP_DEC, 1, 1, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
1031 | { "neg", OP_NEG, 1, 1, OPF_DATA|OPF_FLAGS }, |
1032 | { "mul", OP_MUL, 1, 1, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
1033 | { "imul", OP_IMUL, 1, 3, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
1034 | { "div", OP_DIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
1035 | { "idiv", OP_IDIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
1036 | { "test", OP_TEST, 2, 2, OPF_FLAGS }, |
1037 | { "cmp", OP_CMP, 2, 2, OPF_FLAGS }, |
a3684be1 |
1038 | { "retn", OP_RET, 0, 1, OPF_TAIL }, |
de50b98b |
1039 | { "call", OP_CALL, 1, 1, OPF_JMP|OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
1040 | { "jmp", OP_JMP, 1, 1, OPF_JMP }, |
5c024ef7 |
1041 | { "jecxz",OP_JECXZ, 1, 1, OPF_JMP|OPF_CJMP }, |
04abc5d6 |
1042 | { "loop", OP_LOOP, 1, 1, OPF_JMP|OPF_CJMP|OPF_DATA }, |
092f64e1 |
1043 | { "jo", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_O, 0 }, // 70 OF=1 |
1044 | { "jno", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_O, 1 }, // 71 OF=0 |
1045 | { "jc", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 0 }, // 72 CF=1 |
1046 | { "jb", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 0 }, // 72 |
1047 | { "jnc", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 CF=0 |
1048 | { "jnb", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 |
1049 | { "jae", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 |
1050 | { "jz", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 0 }, // 74 ZF=1 |
1051 | { "je", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 0 }, // 74 |
1052 | { "jnz", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 1 }, // 75 ZF=0 |
1053 | { "jne", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 1 }, // 75 |
1054 | { "jbe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 0 }, // 76 CF=1||ZF=1 |
1055 | { "jna", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 0 }, // 76 |
1056 | { "ja", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 1 }, // 77 CF=0&&ZF=0 |
1057 | { "jnbe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 1 }, // 77 |
1058 | { "js", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_S, 0 }, // 78 SF=1 |
1059 | { "jns", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_S, 1 }, // 79 SF=0 |
1060 | { "jp", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 0 }, // 7a PF=1 |
1061 | { "jpe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 0 }, // 7a |
1062 | { "jnp", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 1 }, // 7b PF=0 |
1063 | { "jpo", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 1 }, // 7b |
1064 | { "jl", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 0 }, // 7c SF!=OF |
1065 | { "jnge", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 0 }, // 7c |
1066 | { "jge", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 1 }, // 7d SF=OF |
1067 | { "jnl", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 1 }, // 7d |
1068 | { "jle", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 0 }, // 7e ZF=1||SF!=OF |
1069 | { "jng", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 0 }, // 7e |
1070 | { "jg", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 1 }, // 7f ZF=0&&SF=OF |
1071 | { "jnle", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 1 }, // 7f |
1072 | { "seto", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_O, 0 }, |
1073 | { "setno", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_O, 1 }, |
1074 | { "setc", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 0 }, |
1075 | { "setb", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 0 }, |
1076 | { "setnc", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
1077 | { "setae", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
1078 | { "setnb", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
1079 | { "setz", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 0 }, |
1080 | { "sete", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 0 }, |
1081 | { "setnz", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 1 }, |
1082 | { "setne", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 1 }, |
1083 | { "setbe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 0 }, |
1084 | { "setna", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 0 }, |
1085 | { "seta", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 1 }, |
1086 | { "setnbe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 1 }, |
1087 | { "sets", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_S, 0 }, |
1088 | { "setns", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_S, 1 }, |
1089 | { "setp", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 0 }, |
1090 | { "setpe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 0 }, |
1091 | { "setnp", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 1 }, |
1092 | { "setpo", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 1 }, |
1093 | { "setl", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 0 }, |
1094 | { "setnge", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 0 }, |
1095 | { "setge", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 1 }, |
1096 | { "setnl", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 1 }, |
1097 | { "setle", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 0 }, |
1098 | { "setng", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 0 }, |
1099 | { "setg", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 }, |
1100 | { "setnle", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 }, |
90307a99 |
1101 | // x87 |
d4a985bd |
1102 | { "fld", OP_FLD, 1, 1, OPF_FPUSH }, |
2c31fb4c |
1103 | { "fild", OP_FILD, 1, 1, OPF_FPUSH|OPF_FINT }, |
d4a985bd |
1104 | { "fld1", OP_FLDc, 0, 0, OPF_FPUSH }, |
b62264bc |
1105 | { "fldl2t", OP_FLDc, 0, 0, OPF_FPUSH }, |
1106 | { "fldl2e", OP_FLDc, 0, 0, OPF_FPUSH }, |
1107 | { "fldpi", OP_FLDc, 0, 0, OPF_FPUSH }, |
1108 | { "fldlg2", OP_FLDc, 0, 0, OPF_FPUSH }, |
fe18df39 |
1109 | { "fldln2", OP_FLDc, 0, 0, OPF_FPUSH }, |
d4a985bd |
1110 | { "fldz", OP_FLDc, 0, 0, OPF_FPUSH }, |
d4a985bd |
1111 | { "fst", OP_FST, 1, 1, 0 }, |
16057ce1 |
1112 | { "fstp", OP_FST, 1, 1, OPF_FPOP }, |
2c31fb4c |
1113 | { "fist", OP_FIST, 1, 1, OPF_FINT }, |
1114 | { "fistp", OP_FIST, 1, 1, OPF_FPOP|OPF_FINT }, |
d4a985bd |
1115 | { "fadd", OP_FADD, 0, 2, 0 }, |
1116 | { "faddp", OP_FADD, 0, 2, OPF_FPOP }, |
1117 | { "fdiv", OP_FDIV, 0, 2, 0 }, |
1118 | { "fdivp", OP_FDIV, 0, 2, OPF_FPOP }, |
1119 | { "fmul", OP_FMUL, 0, 2, 0 }, |
1120 | { "fmulp", OP_FMUL, 0, 2, OPF_FPOP }, |
1121 | { "fsub", OP_FSUB, 0, 2, 0 }, |
1122 | { "fsubp", OP_FSUB, 0, 2, OPF_FPOP }, |
1123 | { "fdivr", OP_FDIVR, 0, 2, 0 }, |
1124 | { "fdivrp", OP_FDIVR, 0, 2, OPF_FPOP }, |
1125 | { "fsubr", OP_FSUBR, 0, 2, 0 }, |
1126 | { "fsubrp", OP_FSUBR, 0, 2, OPF_FPOP }, |
2c31fb4c |
1127 | { "fiadd", OP_FIADD, 1, 1, OPF_FINT }, |
1128 | { "fidiv", OP_FIDIV, 1, 1, OPF_FINT }, |
1129 | { "fimul", OP_FIMUL, 1, 1, OPF_FINT }, |
1130 | { "fisub", OP_FISUB, 1, 1, OPF_FINT }, |
1131 | { "fidivr", OP_FIDIVR, 1, 1, OPF_FINT }, |
1132 | { "fisubr", OP_FISUBR, 1, 1, OPF_FINT }, |
16057ce1 |
1133 | { "fcom", OP_FCOM, 0, 1, 0 }, |
1134 | { "fcomp", OP_FCOM, 0, 1, OPF_FPOP }, |
88eed95d |
1135 | { "fcompp", OP_FCOM, 0, 0, OPF_FPOPP }, |
1136 | { "fucom", OP_FCOM, 0, 1, 0 }, |
1137 | { "fucomp", OP_FCOM, 0, 1, OPF_FPOP }, |
1138 | { "fucompp",OP_FCOM, 0, 0, OPF_FPOPP }, |
16057ce1 |
1139 | { "fnstsw", OP_FNSTSW, 1, 1, OPF_DATA }, |
fe18df39 |
1140 | { "fchs", OP_FCHS, 0, 0, 0 }, |
497a6d6b |
1141 | { "fcos", OP_FCOS, 0, 0, 0 }, |
1142 | { "fpatan", OP_FPATAN, 0, 0, OPF_FPOP }, |
1143 | { "fptan", OP_FPTAN, 0, 0, OPF_FPUSH }, |
1144 | { "fsin", OP_FSIN, 0, 0, 0 }, |
1145 | { "fsqrt", OP_FSQRT, 0, 0, 0 }, |
fe18df39 |
1146 | { "fxch", OP_FXCH, 1, 1, 0 }, |
1147 | { "fyl2x", OP_FYL2X, 0, 0, OPF_FPOP }, |
90307a99 |
1148 | // mmx |
d4a985bd |
1149 | { "emms", OP_EMMS, 0, 0, OPF_DATA }, |
1150 | { "movq", OP_MOV, 2, 2, OPF_DATA }, |
1151 | // pseudo-ops for lib calls |
622eb2ef |
1152 | { "_allshl",OPP_ALLSHL }, |
1153 | { "_allshr",OPP_ALLSHR }, |
d4a985bd |
1154 | { "_ftol", OPP_FTOL }, |
8c83cc48 |
1155 | { "_CIpow", OPP_CIPOW }, |
2c31fb4c |
1156 | { "abort", OPP_ABORT }, |
2c10ea1f |
1157 | // must be last |
1158 | { "ud2", OP_UD2 }, |
69a3cdfc |
1159 | }; |
c36e914d |
1160 | |
1161 | static void parse_op(struct parsed_op *op, char words[16][256], int wordc) |
1162 | { |
bfa4a6ee |
1163 | enum opr_lenmod lmod = OPLM_UNSPEC; |
33c35af6 |
1164 | int prefix_flags = 0; |
69a3cdfc |
1165 | int regmask_ind; |
1166 | int regmask; |
33c35af6 |
1167 | int op_w = 0; |
91977a1c |
1168 | int opr = 0; |
33c35af6 |
1169 | int w = 0; |
acd03176 |
1170 | int i, j; |
c36e914d |
1171 | |
33c35af6 |
1172 | for (i = 0; i < ARRAY_SIZE(pref_table); i++) { |
1173 | if (IS(words[w], pref_table[i].name)) { |
1174 | prefix_flags = pref_table[i].flags; |
1175 | break; |
1176 | } |
1177 | } |
1178 | |
1179 | if (prefix_flags) { |
1180 | if (wordc <= 1) |
1181 | aerr("lone prefix: '%s'\n", words[0]); |
1182 | w++; |
1183 | } |
1184 | |
1185 | op_w = w; |
91977a1c |
1186 | for (i = 0; i < ARRAY_SIZE(op_table); i++) { |
33c35af6 |
1187 | if (IS(words[w], op_table[i].name)) |
69a3cdfc |
1188 | break; |
1189 | } |
c36e914d |
1190 | |
2c10ea1f |
1191 | if (i == ARRAY_SIZE(op_table)) { |
30c8c549 |
1192 | if (!g_skip_func) |
1193 | aerr("unhandled op: '%s'\n", words[0]); |
2c10ea1f |
1194 | i--; // OP_UD2 |
1195 | } |
33c35af6 |
1196 | w++; |
c36e914d |
1197 | |
69a3cdfc |
1198 | op->op = op_table[i].op; |
33c35af6 |
1199 | op->flags = op_table[i].flags | prefix_flags; |
092f64e1 |
1200 | op->pfo = op_table[i].pfo; |
1201 | op->pfo_inv = op_table[i].pfo_inv; |
69a3cdfc |
1202 | op->regmask_src = op->regmask_dst = 0; |
8eb12e72 |
1203 | op->asmln = asmln; |
69a3cdfc |
1204 | |
2c10ea1f |
1205 | if (op->op == OP_UD2) |
1206 | return; |
1207 | |
92d715b6 |
1208 | for (opr = 0; opr < op_table[i].maxopr; opr++) { |
1209 | if (opr >= op_table[i].minopr && w >= wordc) |
1210 | break; |
1211 | |
69a3cdfc |
1212 | regmask = regmask_ind = 0; |
1213 | w = parse_operand(&op->operand[opr], ®mask, ®mask_ind, |
1214 | words, wordc, w, op->flags); |
1215 | |
1216 | if (opr == 0 && (op->flags & OPF_DATA)) |
1217 | op->regmask_dst = regmask; |
92d715b6 |
1218 | else |
1219 | op->regmask_src |= regmask; |
1220 | op->regmask_src |= regmask_ind; |
d4a985bd |
1221 | |
1222 | if (op->operand[opr].lmod != OPLM_UNSPEC) |
1223 | g_func_lmods |= 1 << op->operand[opr].lmod; |
91977a1c |
1224 | } |
c36e914d |
1225 | |
91977a1c |
1226 | if (w < wordc) |
1227 | aerr("parse_op %s incomplete: %d/%d\n", |
1228 | words[0], w, wordc); |
5101a5f9 |
1229 | |
1230 | // special cases |
1231 | op->operand_cnt = opr; |
1232 | if (!strncmp(op_table[i].name, "set", 3)) |
1233 | op->operand[0].lmod = OPLM_BYTE; |
1234 | |
5101a5f9 |
1235 | switch (op->op) { |
92d715b6 |
1236 | // first operand is not dst |
1237 | case OP_CMP: |
1238 | case OP_TEST: |
1239 | op->regmask_src |= op->regmask_dst; |
1240 | op->regmask_dst = 0; |
1241 | break; |
1242 | |
1243 | // first operand is src too |
1244 | case OP_NOT: |
1245 | case OP_ADD: |
1246 | case OP_AND: |
1247 | case OP_OR: |
1248 | case OP_RCL: |
1249 | case OP_RCR: |
1250 | case OP_ADC: |
1251 | case OP_INC: |
1252 | case OP_DEC: |
1253 | case OP_NEG: |
622eb2ef |
1254 | case OP_BSWAP: |
92d715b6 |
1255 | // more below.. |
1256 | op->regmask_src |= op->regmask_dst; |
1257 | break; |
1258 | |
1259 | // special |
1260 | case OP_XCHG: |
1261 | op->regmask_src |= op->regmask_dst; |
1262 | op->regmask_dst |= op->regmask_src; |
1263 | goto check_align; |
1264 | |
1265 | case OP_SUB: |
1266 | case OP_SBB: |
1267 | case OP_XOR: |
1268 | if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG |
1269 | && op->operand[0].lmod == op->operand[1].lmod |
1270 | && op->operand[0].reg == op->operand[1].reg |
1271 | && IS(op->operand[0].name, op->operand[1].name)) // ! ah, al.. |
1272 | { |
1273 | op->regmask_src = 0; |
1274 | } |
1275 | else |
1276 | op->regmask_src |= op->regmask_dst; |
1277 | break; |
1278 | |
1279 | // ops with implicit argumets |
04abc5d6 |
1280 | case OP_XLAT: |
1281 | op->operand_cnt = 2; |
1282 | setup_reg_opr(&op->operand[0], xAX, OPLM_BYTE, &op->regmask_src); |
1283 | op->regmask_dst = op->regmask_src; |
3947cf24 |
1284 | setup_reg_opr(&op->operand[1], xBX, OPLM_DWORD, &op->regmask_src); |
04abc5d6 |
1285 | break; |
1286 | |
5101a5f9 |
1287 | case OP_CDQ: |
1288 | op->operand_cnt = 2; |
1289 | setup_reg_opr(&op->operand[0], xDX, OPLM_DWORD, &op->regmask_dst); |
1290 | setup_reg_opr(&op->operand[1], xAX, OPLM_DWORD, &op->regmask_src); |
1291 | break; |
1292 | |
092f64e1 |
1293 | case OP_LODS: |
33c35af6 |
1294 | case OP_STOS: |
591721d7 |
1295 | case OP_SCAS: |
591721d7 |
1296 | if (words[op_w][4] == 'b') |
33c35af6 |
1297 | lmod = OPLM_BYTE; |
591721d7 |
1298 | else if (words[op_w][4] == 'w') |
33c35af6 |
1299 | lmod = OPLM_WORD; |
591721d7 |
1300 | else if (words[op_w][4] == 'd') |
33c35af6 |
1301 | lmod = OPLM_DWORD; |
acd03176 |
1302 | j = 0; |
3947cf24 |
1303 | op->regmask_src = 0; |
acd03176 |
1304 | setup_reg_opr(&op->operand[j++], op->op == OP_LODS ? xSI : xDI, |
3947cf24 |
1305 | OPLM_DWORD, &op->regmask_src); |
d4e3b5db |
1306 | op->regmask_dst = op->regmask_src; |
3947cf24 |
1307 | setup_reg_opr(&op->operand[j++], xAX, lmod, |
092f64e1 |
1308 | op->op == OP_LODS ? &op->regmask_dst : &op->regmask_src); |
3947cf24 |
1309 | if (op->flags & OPF_REP) { |
1310 | setup_reg_opr(&op->operand[j++], xCX, OPLM_DWORD, &op->regmask_src); |
1311 | op->regmask_dst |= 1 << xCX; |
1312 | } |
acd03176 |
1313 | op->operand_cnt = j; |
33c35af6 |
1314 | break; |
1315 | |
d4e3b5db |
1316 | case OP_MOVS: |
7ba45c34 |
1317 | case OP_CMPS: |
7ba45c34 |
1318 | if (words[op_w][4] == 'b') |
d4e3b5db |
1319 | lmod = OPLM_BYTE; |
7ba45c34 |
1320 | else if (words[op_w][4] == 'w') |
d4e3b5db |
1321 | lmod = OPLM_WORD; |
7ba45c34 |
1322 | else if (words[op_w][4] == 'd') |
d4e3b5db |
1323 | lmod = OPLM_DWORD; |
acd03176 |
1324 | j = 0; |
3947cf24 |
1325 | op->regmask_src = 0; |
1326 | // note: lmod is not correct, don't have where to place it |
acd03176 |
1327 | setup_reg_opr(&op->operand[j++], xDI, lmod, &op->regmask_src); |
1328 | setup_reg_opr(&op->operand[j++], xSI, OPLM_DWORD, &op->regmask_src); |
1329 | if (op->flags & OPF_REP) |
1330 | setup_reg_opr(&op->operand[j++], xCX, OPLM_DWORD, &op->regmask_src); |
1331 | op->operand_cnt = j; |
d4e3b5db |
1332 | op->regmask_dst = op->regmask_src; |
1333 | break; |
1334 | |
193c11bf |
1335 | case OP_RDTSC: |
1336 | op->regmask_dst = mxAX | mxDX; |
1337 | break; |
1338 | |
1339 | case OP_CPUID: |
1340 | // for now, ignore ecx dep for eax={4,7,b,d} |
1341 | op->regmask_src = mxAX; |
1342 | op->regmask_dst = mxAX | mxBX | mxCX | mxDX; |
1343 | break; |
1344 | |
04abc5d6 |
1345 | case OP_LOOP: |
1346 | op->regmask_dst = 1 << xCX; |
1347 | // fallthrough |
5c024ef7 |
1348 | case OP_JECXZ: |
04abc5d6 |
1349 | op->operand_cnt = 2; |
5c024ef7 |
1350 | op->regmask_src = 1 << xCX; |
04abc5d6 |
1351 | op->operand[1].type = OPT_REG; |
1352 | op->operand[1].reg = xCX; |
1353 | op->operand[1].lmod = OPLM_DWORD; |
5c024ef7 |
1354 | break; |
1355 | |
5101a5f9 |
1356 | case OP_IMUL: |
b2bd20c0 |
1357 | if (op->operand_cnt == 2) { |
1358 | if (op->operand[0].type != OPT_REG) |
1359 | aerr("reg expected\n"); |
1360 | op->regmask_src |= 1 << op->operand[0].reg; |
1361 | } |
5101a5f9 |
1362 | if (op->operand_cnt != 1) |
1363 | break; |
1364 | // fallthrough |
1365 | case OP_MUL: |
1366 | // singleop mul |
5101a5f9 |
1367 | if (op->operand[0].lmod == OPLM_UNSPEC) |
1368 | op->operand[0].lmod = OPLM_DWORD; |
087ced53 |
1369 | op->regmask_src = mxAX | op->regmask_dst; |
1370 | op->regmask_dst = mxAX; |
1371 | if (op->operand[0].lmod != OPLM_BYTE) |
1372 | op->regmask_dst |= mxDX; |
5101a5f9 |
1373 | break; |
1374 | |
1375 | case OP_DIV: |
1376 | case OP_IDIV: |
1377 | // we could set up operands for edx:eax, but there is no real need to |
1378 | // (see is_opr_modified()) |
5101a5f9 |
1379 | if (op->operand[0].lmod == OPLM_UNSPEC) |
1380 | op->operand[0].lmod = OPLM_DWORD; |
087ced53 |
1381 | op->regmask_src = mxAX | op->regmask_dst; |
1382 | op->regmask_dst = mxAX; |
1383 | if (op->operand[0].lmod != OPLM_BYTE) { |
1384 | op->regmask_src |= mxDX; |
1385 | op->regmask_dst |= mxDX; |
1386 | } |
5101a5f9 |
1387 | break; |
1388 | |
1389 | case OP_SHL: |
1390 | case OP_SHR: |
1391 | case OP_SAR: |
d4e3b5db |
1392 | case OP_ROL: |
1393 | case OP_ROR: |
92d715b6 |
1394 | op->regmask_src |= op->regmask_dst; |
5101a5f9 |
1395 | if (op->operand[1].lmod == OPLM_UNSPEC) |
1396 | op->operand[1].lmod = OPLM_BYTE; |
1397 | break; |
1398 | |
acd03176 |
1399 | case OP_SHLD: |
3b2f4044 |
1400 | case OP_SHRD: |
92d715b6 |
1401 | op->regmask_src |= op->regmask_dst; |
3b2f4044 |
1402 | if (op->operand[2].lmod == OPLM_UNSPEC) |
1403 | op->operand[2].lmod = OPLM_BYTE; |
1404 | break; |
1405 | |
7ba45c34 |
1406 | case OP_PUSH: |
92d715b6 |
1407 | op->regmask_src |= op->regmask_dst; |
1408 | op->regmask_dst = 0; |
7ba45c34 |
1409 | if (op->operand[0].lmod == OPLM_UNSPEC |
1410 | && (op->operand[0].type == OPT_CONST |
1411 | || op->operand[0].type == OPT_OFFSET |
1412 | || op->operand[0].type == OPT_LABEL)) |
1413 | op->operand[0].lmod = OPLM_DWORD; |
1414 | break; |
1415 | |
3ebea2cf |
1416 | // alignment |
1417 | case OP_MOV: |
092f64e1 |
1418 | check_align: |
3ebea2cf |
1419 | if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG |
092f64e1 |
1420 | && op->operand[0].lmod == op->operand[1].lmod |
1421 | && op->operand[0].reg == op->operand[1].reg |
92d715b6 |
1422 | && IS(op->operand[0].name, op->operand[1].name)) // ! ah, al.. |
3ebea2cf |
1423 | { |
b2bd20c0 |
1424 | op->flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
092f64e1 |
1425 | op->regmask_src = op->regmask_dst = 0; |
3ebea2cf |
1426 | } |
1427 | break; |
1428 | |
de50b98b |
1429 | case OP_LEA: |
1430 | if (op->operand[0].type == OPT_REG |
1431 | && op->operand[1].type == OPT_REGMEM) |
1432 | { |
1433 | char buf[16]; |
1434 | snprintf(buf, sizeof(buf), "%s+0", op->operand[0].name); |
1435 | if (IS(buf, op->operand[1].name)) |
b2bd20c0 |
1436 | op->flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
de50b98b |
1437 | } |
1438 | break; |
1439 | |
89ff3147 |
1440 | case OP_CALL: |
087ced53 |
1441 | // needed because of OPF_DATA |
354f5504 |
1442 | op->regmask_src |= op->regmask_dst; |
89ff3147 |
1443 | // trashed regs must be explicitly detected later |
1444 | op->regmask_dst = 0; |
1445 | break; |
1446 | |
92d715b6 |
1447 | case OP_LEAVE: |
1448 | op->regmask_dst = (1 << xBP) | (1 << xSP); |
1449 | op->regmask_src = 1 << xBP; |
1450 | break; |
1451 | |
d4a985bd |
1452 | case OP_FLD: |
1453 | case OP_FILD: |
1454 | op->regmask_dst |= mxST0; |
1455 | break; |
1456 | |
1457 | case OP_FLDc: |
1458 | op->regmask_dst |= mxST0; |
1459 | if (IS(words[op_w] + 3, "1")) |
1460 | op->operand[0].val = X87_CONST_1; |
b62264bc |
1461 | else if (IS(words[op_w] + 3, "l2t")) |
1462 | op->operand[0].val = X87_CONST_L2T; |
1463 | else if (IS(words[op_w] + 3, "l2e")) |
1464 | op->operand[0].val = X87_CONST_L2E; |
1465 | else if (IS(words[op_w] + 3, "pi")) |
1466 | op->operand[0].val = X87_CONST_PI; |
1467 | else if (IS(words[op_w] + 3, "lg2")) |
1468 | op->operand[0].val = X87_CONST_LG2; |
fe18df39 |
1469 | else if (IS(words[op_w] + 3, "ln2")) |
1470 | op->operand[0].val = X87_CONST_LN2; |
d4a985bd |
1471 | else if (IS(words[op_w] + 3, "z")) |
1472 | op->operand[0].val = X87_CONST_Z; |
1473 | else |
b62264bc |
1474 | aerr("fld what?\n"); |
d4a985bd |
1475 | break; |
1476 | |
1477 | case OP_FST: |
16057ce1 |
1478 | case OP_FIST: |
d4a985bd |
1479 | op->regmask_src |= mxST0; |
1480 | break; |
1481 | |
1482 | case OP_FADD: |
1483 | case OP_FDIV: |
1484 | case OP_FMUL: |
1485 | case OP_FSUB: |
1486 | case OP_FDIVR: |
1487 | case OP_FSUBR: |
1488 | op->regmask_src |= mxST0; |
1489 | if (op->operand_cnt == 2) |
1490 | op->regmask_src |= op->regmask_dst; |
1491 | else if (op->operand_cnt == 1) { |
1492 | memcpy(&op->operand[1], &op->operand[0], sizeof(op->operand[1])); |
1493 | op->operand[0].type = OPT_REG; |
1494 | op->operand[0].lmod = OPLM_QWORD; |
1495 | op->operand[0].reg = xST0; |
1496 | op->regmask_dst |= mxST0; |
1497 | } |
1498 | else |
1499 | // IDA doesn't use this |
1500 | aerr("no operands?\n"); |
1501 | break; |
1502 | |
1503 | case OP_FIADD: |
1504 | case OP_FIDIV: |
1505 | case OP_FIMUL: |
1506 | case OP_FISUB: |
1507 | case OP_FIDIVR: |
1508 | case OP_FISUBR: |
fe18df39 |
1509 | case OP_FCHS: |
497a6d6b |
1510 | case OP_FCOS: |
1511 | case OP_FSIN: |
1512 | case OP_FSQRT: |
fe18df39 |
1513 | case OP_FXCH: |
d4a985bd |
1514 | op->regmask_src |= mxST0; |
1515 | op->regmask_dst |= mxST0; |
1516 | break; |
1517 | |
497a6d6b |
1518 | case OP_FPATAN: |
fe18df39 |
1519 | case OP_FYL2X: |
497a6d6b |
1520 | op->regmask_src |= mxST0 | mxST1; |
1521 | op->regmask_dst |= mxST0; |
1522 | break; |
1523 | |
1524 | case OP_FPTAN: |
1525 | aerr("TODO\n"); |
1526 | break; |
1527 | |
16057ce1 |
1528 | case OP_FCOM: |
1529 | op->regmask_src |= mxST0; |
88eed95d |
1530 | if (op->operand_cnt == 0) { |
1531 | op->operand_cnt = 1; |
1532 | op->operand[0].type = OPT_REG; |
1533 | op->operand[0].lmod = OPLM_QWORD; |
1534 | op->operand[0].reg = xST1; |
1535 | op->regmask_src |= mxST1; |
1536 | } |
16057ce1 |
1537 | break; |
1538 | |
5101a5f9 |
1539 | default: |
1540 | break; |
1541 | } |
2b70f6d3 |
1542 | |
1543 | if (op->operand[0].type == OPT_REG |
2b70f6d3 |
1544 | && op->operand[1].type == OPT_CONST) |
1545 | { |
acd03176 |
1546 | struct parsed_opr *op1 = &op->operand[1]; |
1547 | if ((op->op == OP_AND && op1->val == 0) |
1548 | || (op->op == OP_OR |
1549 | && (op1->val == ~0 |
1550 | || (op->operand[0].lmod == OPLM_WORD && op1->val == 0xffff) |
1551 | || (op->operand[0].lmod == OPLM_BYTE && op1->val == 0xff)))) |
2b70f6d3 |
1552 | { |
1553 | op->regmask_src = 0; |
1554 | } |
1555 | } |
c36e914d |
1556 | } |
1557 | |
092f64e1 |
1558 | static const char *op_name(struct parsed_op *po) |
850c9265 |
1559 | { |
092f64e1 |
1560 | static char buf[16]; |
1561 | char *p; |
850c9265 |
1562 | int i; |
1563 | |
092f64e1 |
1564 | if (po->op == OP_JCC || po->op == OP_SCC) { |
1565 | p = buf; |
1566 | *p++ = (po->op == OP_JCC) ? 'j' : 's'; |
1567 | if (po->pfo_inv) |
1568 | *p++ = 'n'; |
1569 | strcpy(p, parsed_flag_op_names[po->pfo]); |
1570 | return buf; |
1571 | } |
1572 | |
850c9265 |
1573 | for (i = 0; i < ARRAY_SIZE(op_table); i++) |
092f64e1 |
1574 | if (op_table[i].op == po->op) |
850c9265 |
1575 | return op_table[i].name; |
1576 | |
1577 | return "???"; |
1578 | } |
1579 | |
1580 | // debug |
1581 | static const char *dump_op(struct parsed_op *po) |
1582 | { |
1583 | static char out[128]; |
1584 | char *p = out; |
1585 | int i; |
1586 | |
4c45fa73 |
1587 | if (po == NULL) |
1588 | return "???"; |
1589 | |
092f64e1 |
1590 | snprintf(out, sizeof(out), "%s", op_name(po)); |
850c9265 |
1591 | for (i = 0; i < po->operand_cnt; i++) { |
1592 | p += strlen(p); |
1593 | if (i > 0) |
1594 | *p++ = ','; |
1595 | snprintf(p, sizeof(out) - (p - out), |
1596 | po->operand[i].type == OPT_REGMEM ? " [%s]" : " %s", |
1597 | po->operand[i].name); |
1598 | } |
1599 | |
1600 | return out; |
1601 | } |
1602 | |
4c45fa73 |
1603 | static const char *lmod_type_u(struct parsed_op *po, |
1604 | enum opr_lenmod lmod) |
1605 | { |
1606 | switch (lmod) { |
90307a99 |
1607 | case OPLM_QWORD: |
1608 | return "u64"; |
4c45fa73 |
1609 | case OPLM_DWORD: |
1610 | return "u32"; |
1611 | case OPLM_WORD: |
1612 | return "u16"; |
1613 | case OPLM_BYTE: |
1614 | return "u8"; |
1615 | default: |
1616 | ferr(po, "invalid lmod: %d\n", lmod); |
1617 | return "(_invalid_)"; |
1618 | } |
1619 | } |
1620 | |
d4e3b5db |
1621 | static const char *lmod_cast_u(struct parsed_op *po, |
1622 | enum opr_lenmod lmod) |
1623 | { |
1624 | switch (lmod) { |
90307a99 |
1625 | case OPLM_QWORD: |
1626 | return ""; |
d4e3b5db |
1627 | case OPLM_DWORD: |
1628 | return ""; |
1629 | case OPLM_WORD: |
1630 | return "(u16)"; |
1631 | case OPLM_BYTE: |
1632 | return "(u8)"; |
1633 | default: |
1634 | ferr(po, "invalid lmod: %d\n", lmod); |
1635 | return "(_invalid_)"; |
1636 | } |
1637 | } |
1638 | |
1639 | static const char *lmod_cast_u_ptr(struct parsed_op *po, |
1640 | enum opr_lenmod lmod) |
1641 | { |
1642 | switch (lmod) { |
90307a99 |
1643 | case OPLM_QWORD: |
1644 | return "*(u64 *)"; |
d4e3b5db |
1645 | case OPLM_DWORD: |
1646 | return "*(u32 *)"; |
1647 | case OPLM_WORD: |
1648 | return "*(u16 *)"; |
1649 | case OPLM_BYTE: |
1650 | return "*(u8 *)"; |
1651 | default: |
1652 | ferr(po, "invalid lmod: %d\n", lmod); |
1653 | return "(_invalid_)"; |
1654 | } |
1655 | } |
1656 | |
1657 | static const char *lmod_cast_s(struct parsed_op *po, |
1658 | enum opr_lenmod lmod) |
1659 | { |
1660 | switch (lmod) { |
90307a99 |
1661 | case OPLM_QWORD: |
1662 | return "(s64)"; |
d4e3b5db |
1663 | case OPLM_DWORD: |
1664 | return "(s32)"; |
1665 | case OPLM_WORD: |
1666 | return "(s16)"; |
1667 | case OPLM_BYTE: |
1668 | return "(s8)"; |
1669 | default: |
1670 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
1671 | return "(_invalid_)"; |
1672 | } |
1673 | } |
1674 | |
1675 | static const char *lmod_cast(struct parsed_op *po, |
1676 | enum opr_lenmod lmod, int is_signed) |
1677 | { |
1678 | return is_signed ? |
1679 | lmod_cast_s(po, lmod) : |
1680 | lmod_cast_u(po, lmod); |
1681 | } |
1682 | |
1683 | static int lmod_bytes(struct parsed_op *po, enum opr_lenmod lmod) |
1684 | { |
1685 | switch (lmod) { |
90307a99 |
1686 | case OPLM_QWORD: |
1687 | return 8; |
d4e3b5db |
1688 | case OPLM_DWORD: |
1689 | return 4; |
1690 | case OPLM_WORD: |
1691 | return 2; |
1692 | case OPLM_BYTE: |
1693 | return 1; |
1694 | default: |
1695 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
1696 | return 0; |
1697 | } |
1698 | } |
1699 | |
91977a1c |
1700 | static const char *opr_name(struct parsed_op *po, int opr_num) |
c36e914d |
1701 | { |
91977a1c |
1702 | if (opr_num >= po->operand_cnt) |
1703 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
1704 | return po->operand[opr_num].name; |
c36e914d |
1705 | } |
1706 | |
91977a1c |
1707 | static unsigned int opr_const(struct parsed_op *po, int opr_num) |
c36e914d |
1708 | { |
91977a1c |
1709 | if (opr_num >= po->operand_cnt) |
1710 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
1711 | if (po->operand[opr_num].type != OPT_CONST) |
1712 | ferr(po, "opr %d: const expected\n", opr_num); |
1713 | return po->operand[opr_num].val; |
1714 | } |
c36e914d |
1715 | |
91977a1c |
1716 | static const char *opr_reg_p(struct parsed_op *po, struct parsed_opr *popr) |
1717 | { |
90307a99 |
1718 | if ((unsigned int)popr->reg >= ARRAY_SIZE(regs_r32)) |
91977a1c |
1719 | ferr(po, "invalid reg: %d\n", popr->reg); |
1720 | return regs_r32[popr->reg]; |
1721 | } |
c36e914d |
1722 | |
e7f5bc39 |
1723 | static int check_simple_cast(const char *cast, int *bits, int *is_signed) |
1724 | { |
1725 | if (IS_START(cast, "(s8)") || IS_START(cast, "(u8)")) |
1726 | *bits = 8; |
1727 | else if (IS_START(cast, "(s16)") || IS_START(cast, "(u16)")) |
1728 | *bits = 16; |
1729 | else if (IS_START(cast, "(s32)") || IS_START(cast, "(u32)")) |
1730 | *bits = 32; |
1731 | else if (IS_START(cast, "(s64)") || IS_START(cast, "(u64)")) |
1732 | *bits = 64; |
1733 | else |
1734 | return -1; |
1735 | |
1736 | *is_signed = cast[1] == 's' ? 1 : 0; |
1737 | return 0; |
1738 | } |
1739 | |
1740 | static int check_deref_cast(const char *cast, int *bits) |
1741 | { |
1742 | if (IS_START(cast, "*(u8 *)")) |
1743 | *bits = 8; |
1744 | else if (IS_START(cast, "*(u16 *)")) |
1745 | *bits = 16; |
1746 | else if (IS_START(cast, "*(u32 *)")) |
1747 | *bits = 32; |
1748 | else if (IS_START(cast, "*(u64 *)")) |
1749 | *bits = 64; |
1750 | else |
1751 | return -1; |
1752 | |
1753 | return 0; |
1754 | } |
1755 | |
a2c1d768 |
1756 | // cast1 is the "final" cast |
1757 | static const char *simplify_cast(const char *cast1, const char *cast2) |
1758 | { |
1759 | static char buf[256]; |
e7f5bc39 |
1760 | int bits1, bits2; |
1761 | int s1, s2; |
a2c1d768 |
1762 | |
1763 | if (cast1[0] == 0) |
1764 | return cast2; |
1765 | if (cast2[0] == 0) |
1766 | return cast1; |
1767 | if (IS(cast1, cast2)) |
1768 | return cast1; |
e7f5bc39 |
1769 | |
1770 | if (check_simple_cast(cast1, &bits1, &s1) == 0 |
1771 | && check_simple_cast(cast2, &bits2, &s2) == 0) |
1772 | { |
1773 | if (bits1 <= bits2) |
1774 | return cast1; |
1775 | } |
1776 | if (check_simple_cast(cast1, &bits1, &s1) == 0 |
1777 | && check_deref_cast(cast2, &bits2) == 0) |
1778 | { |
1779 | if (bits1 == bits2) { |
1780 | snprintf(buf, sizeof(buf), "*(%c%d *)", s1 ? 's' : 'u', bits1); |
1781 | return buf; |
1782 | } |
1783 | } |
1784 | |
1cd4a663 |
1785 | if (strchr(cast1, '*') && IS_START(cast2, "(u32)")) |
1786 | return cast1; |
a2c1d768 |
1787 | |
1788 | snprintf(buf, sizeof(buf), "%s%s", cast1, cast2); |
1789 | return buf; |
1790 | } |
1791 | |
1792 | static const char *simplify_cast_num(const char *cast, unsigned int val) |
1793 | { |
1794 | if (IS(cast, "(u8)") && val < 0x100) |
1795 | return ""; |
1796 | if (IS(cast, "(s8)") && val < 0x80) |
1797 | return ""; |
1798 | if (IS(cast, "(u16)") && val < 0x10000) |
1799 | return ""; |
1800 | if (IS(cast, "(s16)") && val < 0x8000) |
1801 | return ""; |
1802 | if (IS(cast, "(s32)") && val < 0x80000000) |
1803 | return ""; |
1804 | |
1805 | return cast; |
1806 | } |
1807 | |
39b168b8 |
1808 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
1809 | int *extra_offs) |
91977a1c |
1810 | { |
39b168b8 |
1811 | const char *p; |
1812 | char *endp; |
1813 | int namelen; |
850c9265 |
1814 | int i; |
1815 | |
39b168b8 |
1816 | *extra_offs = 0; |
1817 | namelen = strlen(name); |
1818 | |
c8fb3694 |
1819 | p = strpbrk(name, "+-"); |
39b168b8 |
1820 | if (p != NULL) { |
1821 | namelen = p - name; |
1822 | if (namelen <= 0) |
1823 | ferr(po, "equ parse failed for '%s'\n", name); |
1824 | |
e27467d0 |
1825 | errno = 0; |
39b168b8 |
1826 | *extra_offs = strtol(p, &endp, 16); |
e27467d0 |
1827 | if (*endp != 0 || errno != 0) |
39b168b8 |
1828 | ferr(po, "equ parse failed for '%s'\n", name); |
1829 | } |
1830 | |
850c9265 |
1831 | for (i = 0; i < g_eqcnt; i++) |
39b168b8 |
1832 | if (strncmp(g_eqs[i].name, name, namelen) == 0 |
1833 | && g_eqs[i].name[namelen] == 0) |
850c9265 |
1834 | break; |
87bf6cec |
1835 | if (i >= g_eqcnt) { |
1836 | if (po != NULL) |
1837 | ferr(po, "unresolved equ name: '%s'\n", name); |
1838 | return NULL; |
1839 | } |
850c9265 |
1840 | |
1841 | return &g_eqs[i]; |
1842 | } |
1843 | |
1cd4a663 |
1844 | static int is_stack_access(struct parsed_op *po, |
1845 | const struct parsed_opr *popr) |
850c9265 |
1846 | { |
30620174 |
1847 | return (parse_stack_el(popr->name, NULL, NULL, 0) |
1cd4a663 |
1848 | || (g_bp_frame && !(po->flags & OPF_EBP_S) |
1849 | && IS_START(popr->name, "ebp"))); |
1850 | } |
1851 | |
1852 | static void parse_stack_access(struct parsed_op *po, |
1853 | const char *name, char *ofs_reg, int *offset_out, |
037f4971 |
1854 | int *stack_ra_out, const char **bp_arg_out, int is_lea) |
1cd4a663 |
1855 | { |
1856 | const char *bp_arg = ""; |
1857 | const char *p = NULL; |
91977a1c |
1858 | struct parsed_equ *eq; |
4f12f671 |
1859 | char *endp = NULL; |
d4e3b5db |
1860 | int stack_ra = 0; |
39b168b8 |
1861 | int offset = 0; |
91977a1c |
1862 | |
1cd4a663 |
1863 | ofs_reg[0] = 0; |
a3684be1 |
1864 | |
1865 | if (IS_START(name, "ebp-") |
1866 | || (IS_START(name, "ebp+") && '0' <= name[4] && name[4] <= '9')) |
1867 | { |
1868 | p = name + 4; |
1869 | if (IS_START(p, "0x")) |
1870 | p += 2; |
e27467d0 |
1871 | errno = 0; |
a3684be1 |
1872 | offset = strtoul(p, &endp, 16); |
1873 | if (name[3] == '-') |
1874 | offset = -offset; |
e27467d0 |
1875 | if (*endp != 0 || errno != 0) |
a3684be1 |
1876 | ferr(po, "ebp- parse of '%s' failed\n", name); |
1877 | } |
1878 | else { |
30620174 |
1879 | bp_arg = parse_stack_el(name, ofs_reg, NULL, 0); |
4f12f671 |
1880 | eq = equ_find(po, bp_arg, &offset); |
1881 | if (eq == NULL) |
1882 | ferr(po, "detected but missing eq\n"); |
1883 | offset += eq->offset; |
1884 | } |
39b168b8 |
1885 | |
d4e3b5db |
1886 | if (!strncmp(name, "ebp", 3)) |
1887 | stack_ra = 4; |
1888 | |
037f4971 |
1889 | // yes it sometimes LEAs ra for compares.. |
1890 | if (!is_lea && ofs_reg[0] == 0 |
1891 | && stack_ra <= offset && offset < stack_ra + 4) |
1892 | { |
39b168b8 |
1893 | ferr(po, "reference to ra? %d %d\n", offset, stack_ra); |
037f4971 |
1894 | } |
d4e3b5db |
1895 | |
1cd4a663 |
1896 | *offset_out = offset; |
30620174 |
1897 | if (stack_ra_out) |
1898 | *stack_ra_out = stack_ra; |
1cd4a663 |
1899 | if (bp_arg_out) |
1900 | *bp_arg_out = bp_arg; |
1901 | } |
1902 | |
30620174 |
1903 | static int parse_stack_esp_offset(struct parsed_op *po, |
1904 | const char *name, int *offset_out) |
1905 | { |
1906 | char ofs_reg[16] = { 0, }; |
1907 | struct parsed_equ *eq; |
1908 | const char *bp_arg; |
1909 | char *endp = NULL; |
1910 | int base_val = 0; |
1911 | int offset = 0; |
1912 | |
1913 | if (strstr(name, "esp") == NULL) |
1914 | return -1; |
1915 | bp_arg = parse_stack_el(name, ofs_reg, &base_val, 0); |
1916 | if (bp_arg == NULL) { |
1917 | // just plain offset? |
1918 | if (!IS_START(name, "esp+")) |
1919 | return -1; |
e27467d0 |
1920 | errno = 0; |
30620174 |
1921 | offset = strtol(name + 4, &endp, 0); |
e27467d0 |
1922 | if (endp == NULL || *endp != 0 || errno != 0) |
30620174 |
1923 | return -1; |
1924 | *offset_out = offset; |
1925 | return 0; |
1926 | } |
1927 | |
1928 | if (ofs_reg[0] != 0) |
1929 | return -1; |
1930 | eq = equ_find(po, bp_arg, &offset); |
1931 | if (eq == NULL) |
1932 | ferr(po, "detected but missing eq\n"); |
1933 | offset += eq->offset; |
1934 | *offset_out = base_val + offset; |
1935 | return 0; |
1936 | } |
1937 | |
5f70a34f |
1938 | static int stack_frame_access(struct parsed_op *po, |
1cd4a663 |
1939 | struct parsed_opr *popr, char *buf, size_t buf_size, |
1940 | const char *name, const char *cast, int is_src, int is_lea) |
1941 | { |
1942 | enum opr_lenmod tmp_lmod = OPLM_UNSPEC; |
1943 | const char *prefix = ""; |
1944 | const char *bp_arg = NULL; |
1945 | char ofs_reg[16] = { 0, }; |
193c11bf |
1946 | char argname[8]; |
1cd4a663 |
1947 | int i, arg_i, arg_s; |
1948 | int unaligned = 0; |
1949 | int stack_ra = 0; |
1950 | int offset = 0; |
5f70a34f |
1951 | int retval = -1; |
1cd4a663 |
1952 | int sf_ofs; |
1cd4a663 |
1953 | |
f9327ad4 |
1954 | if (g_bp_frame && (po->flags & OPF_EBP_S) |
1955 | && !(po->regmask_src & mxSP)) |
1cd4a663 |
1956 | ferr(po, "stack_frame_access while ebp is scratch\n"); |
1957 | |
037f4971 |
1958 | parse_stack_access(po, name, ofs_reg, &offset, |
1959 | &stack_ra, &bp_arg, is_lea); |
1cd4a663 |
1960 | |
93b5bd18 |
1961 | snprintf(g_comment, sizeof(g_comment), "%s", bp_arg); |
1962 | |
4f12f671 |
1963 | if (offset > stack_ra) |
1964 | { |
39b168b8 |
1965 | arg_i = (offset - stack_ra - 4) / 4; |
bd96f656 |
1966 | if (arg_i < 0 || arg_i >= g_func_pp->argc_stack) |
4f12f671 |
1967 | { |
bd96f656 |
1968 | if (g_func_pp->is_vararg |
1969 | && arg_i == g_func_pp->argc_stack && is_lea) |
1970 | { |
4f12f671 |
1971 | // should be va_list |
1972 | if (cast[0] == 0) |
1973 | cast = "(u32)"; |
1974 | snprintf(buf, buf_size, "%sap", cast); |
5f70a34f |
1975 | return -1; |
4f12f671 |
1976 | } |
f9d7b461 |
1977 | ferr(po, "offset 0x%x (%s,%d) doesn't map to any arg\n", |
4f12f671 |
1978 | offset, bp_arg, arg_i); |
1979 | } |
4c45fa73 |
1980 | if (ofs_reg[0] != 0) |
7ba45c34 |
1981 | ferr(po, "offset reg on arg access?\n"); |
91977a1c |
1982 | |
bd96f656 |
1983 | for (i = arg_s = 0; i < g_func_pp->argc; i++) { |
1984 | if (g_func_pp->arg[i].reg != NULL) |
91977a1c |
1985 | continue; |
1986 | if (arg_s == arg_i) |
1987 | break; |
1988 | arg_s++; |
1989 | } |
bd96f656 |
1990 | if (i == g_func_pp->argc) |
91977a1c |
1991 | ferr(po, "arg %d not in prototype?\n", arg_i); |
850c9265 |
1992 | |
bd96f656 |
1993 | popr->is_ptr = g_func_pp->arg[i].type.is_ptr; |
5f70a34f |
1994 | retval = i; |
de50b98b |
1995 | |
193c11bf |
1996 | snprintf(argname, sizeof(argname), "%sa%d", |
1997 | g_sct_func_attr & SCTFA_ARGFRAME ? "af." : "", i + 1); |
1998 | |
de50b98b |
1999 | switch (popr->lmod) |
7ba45c34 |
2000 | { |
2001 | case OPLM_BYTE: |
4f12f671 |
2002 | if (is_lea) |
2003 | ferr(po, "lea/byte to arg?\n"); |
7ba45c34 |
2004 | if (is_src && (offset & 3) == 0) |
193c11bf |
2005 | snprintf(buf, buf_size, "%s%s", |
2006 | simplify_cast(cast, "(u8)"), argname); |
7ba45c34 |
2007 | else |
193c11bf |
2008 | snprintf(buf, buf_size, "%sBYTE%d(%s)", |
2009 | cast, offset & 3, argname); |
7ba45c34 |
2010 | break; |
2011 | |
2012 | case OPLM_WORD: |
4f12f671 |
2013 | if (is_lea) |
2014 | ferr(po, "lea/word to arg?\n"); |
a3684be1 |
2015 | if (offset & 1) { |
2016 | unaligned = 1; |
2017 | if (!is_src) { |
2018 | if (offset & 2) |
2019 | ferr(po, "problematic arg store\n"); |
193c11bf |
2020 | snprintf(buf, buf_size, "%s((char *)&%s + 1)", |
2021 | simplify_cast(cast, "*(u16 *)"), argname); |
a3684be1 |
2022 | } |
2023 | else |
2024 | ferr(po, "unaligned arg word load\n"); |
2025 | } |
2026 | else if (is_src && (offset & 2) == 0) |
193c11bf |
2027 | snprintf(buf, buf_size, "%s%s", |
2028 | simplify_cast(cast, "(u16)"), argname); |
7ba45c34 |
2029 | else |
193c11bf |
2030 | snprintf(buf, buf_size, "%s%sWORD(%s)", |
2031 | cast, (offset & 2) ? "HI" : "LO", argname); |
7ba45c34 |
2032 | break; |
2033 | |
2034 | case OPLM_DWORD: |
3ebea2cf |
2035 | if (cast[0]) |
2036 | prefix = cast; |
2037 | else if (is_src) |
2038 | prefix = "(u32)"; |
a3684be1 |
2039 | |
de50b98b |
2040 | if (offset & 3) { |
a3684be1 |
2041 | unaligned = 1; |
2b43685d |
2042 | if (is_lea) |
193c11bf |
2043 | snprintf(buf, buf_size, "(u32)&%s + %d", |
2044 | argname, offset & 3); |
a3684be1 |
2045 | else if (!is_src) |
2046 | ferr(po, "unaligned arg store\n"); |
2047 | else { |
2048 | // mov edx, [ebp+arg_4+2]; movsx ecx, dx |
193c11bf |
2049 | snprintf(buf, buf_size, "%s(%s >> %d)", |
2050 | prefix, argname, (offset & 3) * 8); |
a3684be1 |
2051 | } |
de50b98b |
2052 | } |
2053 | else { |
193c11bf |
2054 | snprintf(buf, buf_size, "%s%s%s", |
2055 | prefix, is_lea ? "&" : "", argname); |
de50b98b |
2056 | } |
7ba45c34 |
2057 | break; |
2058 | |
2c31fb4c |
2059 | case OPLM_QWORD: |
2060 | ferr_assert(po, !(offset & 7)); |
2061 | if (cast[0]) |
2062 | prefix = cast; |
193c11bf |
2063 | snprintf(buf, buf_size, "%s%s%s", |
2064 | prefix, is_lea ? "&" : "", argname); |
2c31fb4c |
2065 | break; |
2066 | |
7ba45c34 |
2067 | default: |
de50b98b |
2068 | ferr(po, "bp_arg bad lmod: %d\n", popr->lmod); |
7ba45c34 |
2069 | } |
2070 | |
a3684be1 |
2071 | if (unaligned) |
93b5bd18 |
2072 | strcat(g_comment, " unaligned"); |
a3684be1 |
2073 | |
7ba45c34 |
2074 | // common problem |
bd96f656 |
2075 | guess_lmod_from_c_type(&tmp_lmod, &g_func_pp->arg[i].type); |
a2c1d768 |
2076 | if (tmp_lmod != OPLM_DWORD |
de041e5b |
2077 | && (unaligned || (!is_src && lmod_bytes(po, tmp_lmod) |
2078 | < lmod_bytes(po, popr->lmod) + (offset & 3)))) |
a2c1d768 |
2079 | { |
2080 | ferr(po, "bp_arg arg%d/w offset %d and type '%s' is too small\n", |
2081 | i + 1, offset, g_func_pp->arg[i].type.name); |
2082 | } |
4741fdfe |
2083 | // can't check this because msvc likes to reuse |
2084 | // arg space for scratch.. |
2085 | //if (popr->is_ptr && popr->lmod != OPLM_DWORD) |
2086 | // ferr(po, "bp_arg arg%d: non-dword ptr access\n", i + 1); |
91977a1c |
2087 | } |
4f12f671 |
2088 | else |
2089 | { |
1bafb621 |
2090 | if (g_stack_fsz == 0) |
2091 | ferr(po, "stack var access without stackframe\n"); |
a2c1d768 |
2092 | g_stack_frame_used = 1; |
850c9265 |
2093 | |
39b168b8 |
2094 | sf_ofs = g_stack_fsz + offset; |
c8fb3694 |
2095 | if (ofs_reg[0] == 0 && (offset > 0 || sf_ofs < 0)) |
39b168b8 |
2096 | ferr(po, "bp_stack offset %d/%d\n", offset, g_stack_fsz); |
850c9265 |
2097 | |
2098 | if (is_lea) |
33c35af6 |
2099 | prefix = "(u32)&"; |
3ebea2cf |
2100 | else |
2101 | prefix = cast; |
850c9265 |
2102 | |
de50b98b |
2103 | switch (popr->lmod) |
850c9265 |
2104 | { |
2105 | case OPLM_BYTE: |
7ba45c34 |
2106 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
2107 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
850c9265 |
2108 | break; |
7ba45c34 |
2109 | |
850c9265 |
2110 | case OPLM_WORD: |
7ba45c34 |
2111 | if ((sf_ofs & 1) || ofs_reg[0] != 0) { |
2112 | // known unaligned or possibly unaligned |
2113 | strcat(g_comment, " unaligned"); |
2114 | if (prefix[0] == 0) |
2115 | prefix = "*(u16 *)&"; |
2116 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
2117 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
2118 | break; |
2119 | } |
2120 | snprintf(buf, buf_size, "%ssf.w[%d]", prefix, sf_ofs / 2); |
850c9265 |
2121 | break; |
7ba45c34 |
2122 | |
850c9265 |
2123 | case OPLM_DWORD: |
7ba45c34 |
2124 | if ((sf_ofs & 3) || ofs_reg[0] != 0) { |
2125 | // known unaligned or possibly unaligned |
2126 | strcat(g_comment, " unaligned"); |
2127 | if (prefix[0] == 0) |
2128 | prefix = "*(u32 *)&"; |
2129 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
2130 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
2131 | break; |
2132 | } |
2133 | snprintf(buf, buf_size, "%ssf.d[%d]", prefix, sf_ofs / 4); |
850c9265 |
2134 | break; |
7ba45c34 |
2135 | |
d4a985bd |
2136 | case OPLM_QWORD: |
2137 | ferr_assert(po, !(sf_ofs & 7)); |
2138 | ferr_assert(po, ofs_reg[0] == 0); |
8c83cc48 |
2139 | // only used for x87 int64/float, float sets is_lea |
2c31fb4c |
2140 | if (!is_lea && (po->flags & OPF_FINT)) |
2141 | prefix = "*(s64 *)&"; |
2142 | snprintf(buf, buf_size, "%ssf.q[%d]", prefix, sf_ofs / 8); |
d4a985bd |
2143 | break; |
2144 | |
850c9265 |
2145 | default: |
de50b98b |
2146 | ferr(po, "bp_stack bad lmod: %d\n", popr->lmod); |
850c9265 |
2147 | } |
91977a1c |
2148 | } |
5f70a34f |
2149 | |
2150 | return retval; |
91977a1c |
2151 | } |
c36e914d |
2152 | |
89ff3147 |
2153 | static void check_func_pp(struct parsed_op *po, |
2154 | const struct parsed_proto *pp, const char *pfx) |
2155 | { |
179b79a9 |
2156 | enum opr_lenmod tmp_lmod; |
b74c31e3 |
2157 | char buf[256]; |
179b79a9 |
2158 | int ret, i; |
b74c31e3 |
2159 | |
89ff3147 |
2160 | if (pp->argc_reg != 0) { |
8c83cc48 |
2161 | if (!g_allow_user_icall && !pp->is_fastcall) { |
b74c31e3 |
2162 | pp_print(buf, sizeof(buf), pp); |
2163 | ferr(po, "%s: unexpected reg arg in icall: %s\n", pfx, buf); |
2164 | } |
89ff3147 |
2165 | if (pp->argc_stack > 0 && pp->argc_reg != 2) |
2166 | ferr(po, "%s: %d reg arg(s) with %d stack arg(s)\n", |
2167 | pfx, pp->argc_reg, pp->argc_stack); |
2168 | } |
179b79a9 |
2169 | |
2170 | // fptrs must use 32bit args, callsite might have no information and |
2171 | // lack a cast to smaller types, which results in incorrectly masked |
2172 | // args passed (callee may assume masked args, it does on ARM) |
61e29183 |
2173 | if (!pp->is_osinc) { |
179b79a9 |
2174 | for (i = 0; i < pp->argc; i++) { |
2175 | ret = guess_lmod_from_c_type(&tmp_lmod, &pp->arg[i].type); |
2176 | if (ret && tmp_lmod != OPLM_DWORD) |
2177 | ferr(po, "reference to %s with arg%d '%s'\n", pp->name, |
2178 | i + 1, pp->arg[i].type.name); |
2179 | } |
2180 | } |
89ff3147 |
2181 | } |
2182 | |
7aca4698 |
2183 | static const char *check_label_read_ref(struct parsed_op *po, |
1fe8d40e |
2184 | const char *name, int *is_import) |
3ebea2cf |
2185 | { |
840257f6 |
2186 | const struct parsed_proto *pp; |
2187 | |
36595fd2 |
2188 | pp = proto_parse(g_fhdr, name, 0); |
840257f6 |
2189 | if (pp == NULL) |
2190 | ferr(po, "proto_parse failed for ref '%s'\n", name); |
2191 | |
89ff3147 |
2192 | if (pp->is_func) |
2193 | check_func_pp(po, pp, "ref"); |
7aca4698 |
2194 | |
1fe8d40e |
2195 | if (is_import != NULL) |
2196 | *is_import = pp->is_import; |
2197 | |
7aca4698 |
2198 | return pp->name; |
3ebea2cf |
2199 | } |
2200 | |
ba93cc12 |
2201 | static void check_opr(struct parsed_op *po, struct parsed_opr *popr) |
2202 | { |
2203 | if (popr->segment == SEG_FS) |
2204 | ferr(po, "fs: used\n"); |
2205 | if (popr->segment == SEG_GS) |
2206 | ferr(po, "gs: used\n"); |
2207 | } |
2208 | |
91977a1c |
2209 | static char *out_src_opr(char *buf, size_t buf_size, |
591721d7 |
2210 | struct parsed_op *po, struct parsed_opr *popr, const char *cast, |
3ebea2cf |
2211 | int is_lea) |
91977a1c |
2212 | { |
850c9265 |
2213 | char tmp1[256], tmp2[256]; |
2214 | char expr[256]; |
7aca4698 |
2215 | const char *name; |
1fe8d40e |
2216 | int is_import = 0; |
a2c1d768 |
2217 | char *p; |
850c9265 |
2218 | int ret; |
2219 | |
ba93cc12 |
2220 | check_opr(po, popr); |
2221 | |
3ebea2cf |
2222 | if (cast == NULL) |
2223 | cast = ""; |
2224 | |
91977a1c |
2225 | switch (popr->type) { |
2226 | case OPT_REG: |
850c9265 |
2227 | if (is_lea) |
2228 | ferr(po, "lea from reg?\n"); |
2229 | |
91977a1c |
2230 | switch (popr->lmod) { |
90307a99 |
2231 | case OPLM_QWORD: |
2232 | snprintf(buf, buf_size, "%s%s.q", cast, opr_reg_p(po, popr)); |
2233 | break; |
91977a1c |
2234 | case OPLM_DWORD: |
3ebea2cf |
2235 | snprintf(buf, buf_size, "%s%s", cast, opr_reg_p(po, popr)); |
91977a1c |
2236 | break; |
850c9265 |
2237 | case OPLM_WORD: |
a2c1d768 |
2238 | snprintf(buf, buf_size, "%s%s", |
2239 | simplify_cast(cast, "(u16)"), opr_reg_p(po, popr)); |
850c9265 |
2240 | break; |
2241 | case OPLM_BYTE: |
5101a5f9 |
2242 | if (popr->name[1] == 'h') // XXX.. |
a2c1d768 |
2243 | snprintf(buf, buf_size, "%s(%s >> 8)", |
2244 | simplify_cast(cast, "(u8)"), opr_reg_p(po, popr)); |
5101a5f9 |
2245 | else |
a2c1d768 |
2246 | snprintf(buf, buf_size, "%s%s", |
2247 | simplify_cast(cast, "(u8)"), opr_reg_p(po, popr)); |
850c9265 |
2248 | break; |
91977a1c |
2249 | default: |
2250 | ferr(po, "invalid src lmod: %d\n", popr->lmod); |
2251 | } |
2252 | break; |
850c9265 |
2253 | |
91977a1c |
2254 | case OPT_REGMEM: |
1cd4a663 |
2255 | if (is_stack_access(po, popr)) { |
de50b98b |
2256 | stack_frame_access(po, popr, buf, buf_size, |
3ebea2cf |
2257 | popr->name, cast, 1, is_lea); |
91977a1c |
2258 | break; |
2259 | } |
850c9265 |
2260 | |
2261 | strcpy(expr, popr->name); |
2262 | if (strchr(expr, '[')) { |
2263 | // special case: '[' can only be left for label[reg] form |
2264 | ret = sscanf(expr, "%[^[][%[^]]]", tmp1, tmp2); |
2265 | if (ret != 2) |
2266 | ferr(po, "parse failure for '%s'\n", expr); |
a2c1d768 |
2267 | if (tmp1[0] == '(') { |
2268 | // (off_4FFF50+3)[eax] |
2269 | p = strchr(tmp1 + 1, ')'); |
2270 | if (p == NULL || p[1] != 0) |
2271 | ferr(po, "parse failure (2) for '%s'\n", expr); |
2272 | *p = 0; |
2273 | memmove(tmp1, tmp1 + 1, strlen(tmp1)); |
2274 | } |
33c35af6 |
2275 | snprintf(expr, sizeof(expr), "(u32)&%s + %s", tmp1, tmp2); |
850c9265 |
2276 | } |
2277 | |
2278 | // XXX: do we need more parsing? |
2279 | if (is_lea) { |
2280 | snprintf(buf, buf_size, "%s", expr); |
2281 | break; |
2282 | } |
2283 | |
a2c1d768 |
2284 | snprintf(buf, buf_size, "%s(%s)", |
2285 | simplify_cast(cast, lmod_cast_u_ptr(po, popr->lmod)), expr); |
91977a1c |
2286 | break; |
850c9265 |
2287 | |
91977a1c |
2288 | case OPT_LABEL: |
1fe8d40e |
2289 | name = check_label_read_ref(po, popr->name, &is_import); |
2290 | if (is_import) |
2291 | // for imported data, asm is loading the offset |
2292 | goto do_offset; |
2293 | |
3ebea2cf |
2294 | if (cast[0] == 0 && popr->is_ptr) |
2295 | cast = "(u32)"; |
2b43685d |
2296 | |
850c9265 |
2297 | if (is_lea) |
7aca4698 |
2298 | snprintf(buf, buf_size, "(u32)&%s", name); |
2b43685d |
2299 | else if (popr->size_lt) |
2300 | snprintf(buf, buf_size, "%s%s%s%s", cast, |
2301 | lmod_cast_u_ptr(po, popr->lmod), |
7aca4698 |
2302 | popr->is_array ? "" : "&", name); |
850c9265 |
2303 | else |
7aca4698 |
2304 | snprintf(buf, buf_size, "%s%s%s", cast, name, |
7ba45c34 |
2305 | popr->is_array ? "[0]" : ""); |
850c9265 |
2306 | break; |
2307 | |
2308 | case OPT_OFFSET: |
1fe8d40e |
2309 | do_offset: |
2310 | name = check_label_read_ref(po, popr->name, NULL); |
3ebea2cf |
2311 | if (cast[0] == 0) |
2312 | cast = "(u32)"; |
850c9265 |
2313 | if (is_lea) |
2314 | ferr(po, "lea an offset?\n"); |
7aca4698 |
2315 | snprintf(buf, buf_size, "%s&%s", cast, name); |
91977a1c |
2316 | break; |
850c9265 |
2317 | |
91977a1c |
2318 | case OPT_CONST: |
850c9265 |
2319 | if (is_lea) |
2320 | ferr(po, "lea from const?\n"); |
2321 | |
a2c1d768 |
2322 | printf_number(tmp1, sizeof(tmp1), popr->val); |
ddaf8bd7 |
2323 | if (popr->val == 0 && strchr(cast, '*')) |
2324 | snprintf(buf, buf_size, "NULL"); |
2325 | else |
2326 | snprintf(buf, buf_size, "%s%s", |
2327 | simplify_cast_num(cast, popr->val), tmp1); |
91977a1c |
2328 | break; |
850c9265 |
2329 | |
91977a1c |
2330 | default: |
2331 | ferr(po, "invalid src type: %d\n", popr->type); |
2332 | } |
2333 | |
2334 | return buf; |
2335 | } |
c36e914d |
2336 | |
de50b98b |
2337 | // note: may set is_ptr (we find that out late for ebp frame..) |
91977a1c |
2338 | static char *out_dst_opr(char *buf, size_t buf_size, |
2339 | struct parsed_op *po, struct parsed_opr *popr) |
2340 | { |
ba93cc12 |
2341 | check_opr(po, popr); |
2342 | |
91977a1c |
2343 | switch (popr->type) { |
2344 | case OPT_REG: |
2345 | switch (popr->lmod) { |
90307a99 |
2346 | case OPLM_QWORD: |
2347 | snprintf(buf, buf_size, "%s.q", opr_reg_p(po, popr)); |
2348 | break; |
91977a1c |
2349 | case OPLM_DWORD: |
2350 | snprintf(buf, buf_size, "%s", opr_reg_p(po, popr)); |
2351 | break; |
850c9265 |
2352 | case OPLM_WORD: |
2353 | // ugh.. |
2354 | snprintf(buf, buf_size, "LOWORD(%s)", opr_reg_p(po, popr)); |
2355 | break; |
2356 | case OPLM_BYTE: |
2357 | // ugh.. |
5101a5f9 |
2358 | if (popr->name[1] == 'h') // XXX.. |
2359 | snprintf(buf, buf_size, "BYTE1(%s)", opr_reg_p(po, popr)); |
2360 | else |
2361 | snprintf(buf, buf_size, "LOBYTE(%s)", opr_reg_p(po, popr)); |
850c9265 |
2362 | break; |
91977a1c |
2363 | default: |
2364 | ferr(po, "invalid dst lmod: %d\n", popr->lmod); |
2365 | } |
2366 | break; |
850c9265 |
2367 | |
2368 | case OPT_REGMEM: |
1cd4a663 |
2369 | if (is_stack_access(po, popr)) { |
de50b98b |
2370 | stack_frame_access(po, popr, buf, buf_size, |
3ebea2cf |
2371 | popr->name, "", 0, 0); |
850c9265 |
2372 | break; |
2373 | } |
2374 | |
3ebea2cf |
2375 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
850c9265 |
2376 | |
bfa4a6ee |
2377 | case OPT_LABEL: |
2b43685d |
2378 | if (popr->size_mismatch) |
2379 | snprintf(buf, buf_size, "%s%s%s", |
2380 | lmod_cast_u_ptr(po, popr->lmod), |
2381 | popr->is_array ? "" : "&", popr->name); |
2382 | else |
2383 | snprintf(buf, buf_size, "%s%s", popr->name, |
2384 | popr->is_array ? "[0]" : ""); |
bfa4a6ee |
2385 | break; |
2386 | |
91977a1c |
2387 | default: |
2388 | ferr(po, "invalid dst type: %d\n", popr->type); |
2389 | } |
2390 | |
2391 | return buf; |
2392 | } |
c36e914d |
2393 | |
3ebea2cf |
2394 | static char *out_src_opr_u32(char *buf, size_t buf_size, |
2395 | struct parsed_op *po, struct parsed_opr *popr) |
2396 | { |
2397 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
2398 | } |
2399 | |
2c31fb4c |
2400 | static char *out_opr_float(char *buf, size_t buf_size, |
2401 | struct parsed_op *po, struct parsed_opr *popr, int is_src, |
2402 | int need_float_stack) |
d4a985bd |
2403 | { |
2404 | const char *cast = NULL; |
2405 | char tmp[256]; |
b62264bc |
2406 | union { |
2407 | float f; |
2408 | int i; |
2409 | } u; |
d4a985bd |
2410 | |
2411 | switch (popr->type) { |
2412 | case OPT_REG: |
b62264bc |
2413 | if (popr->reg < xST0 || popr->reg > xST7) { |
2414 | // func arg |
2415 | ferr_assert(po, po->op == OP_PUSH); |
2416 | ferr_assert(po, popr->lmod == OPLM_DWORD); |
2417 | snprintf(buf, buf_size, "*(float *)&%s", opr_reg_p(po, popr)); |
2418 | break; |
2419 | } |
d4a985bd |
2420 | |
fe18df39 |
2421 | if (need_float_stack) { |
2422 | if (popr->reg == xST0) |
2423 | snprintf(buf, buf_size, "f_st[f_stp & 7]"); |
2424 | else |
2425 | snprintf(buf, buf_size, "f_st[(f_stp + %d) & 7]", |
2426 | popr->reg - xST0); |
2427 | } |
2428 | else |
2429 | snprintf(buf, buf_size, "f_st%d", popr->reg - xST0); |
d4a985bd |
2430 | break; |
2431 | |
2432 | case OPT_REGMEM: |
2c31fb4c |
2433 | if (popr->lmod == OPLM_QWORD && is_stack_access(po, popr)) { |
2434 | stack_frame_access(po, popr, buf, buf_size, |
2435 | popr->name, "", is_src, 0); |
2436 | break; |
2437 | } |
2438 | // fallthrough |
d4a985bd |
2439 | case OPT_LABEL: |
2440 | case OPT_OFFSET: |
2441 | switch (popr->lmod) { |
2442 | case OPLM_QWORD: |
2443 | cast = "double"; |
2444 | break; |
2445 | case OPLM_DWORD: |
2446 | cast = "float"; |
2447 | break; |
2448 | default: |
2449 | ferr(po, "unhandled lmod: %d\n", popr->lmod); |
2450 | break; |
2451 | } |
2452 | out_src_opr(tmp, sizeof(tmp), po, popr, "", 1); |
11437ea1 |
2453 | snprintf(buf, buf_size, "*(%s *)(%s)", cast, tmp); |
d4a985bd |
2454 | break; |
2455 | |
b62264bc |
2456 | case OPT_CONST: |
2457 | // only for func float args pushes |
2458 | ferr_assert(po, po->op == OP_PUSH); |
2459 | u.i = po->operand[0].val; |
2460 | if (ceilf(u.f) == u.f) |
2461 | snprintf(buf, buf_size, "%.1ff", u.f); |
2462 | else |
2463 | snprintf(buf, buf_size, "%.8ff", u.f); |
2464 | break; |
2465 | |
d4a985bd |
2466 | default: |
2467 | ferr(po, "invalid float type: %d\n", popr->type); |
2468 | } |
2469 | |
2470 | return buf; |
2471 | } |
2472 | |
2c31fb4c |
2473 | static char *out_src_opr_float(char *buf, size_t buf_size, |
2474 | struct parsed_op *po, struct parsed_opr *popr, int need_float_stack) |
2475 | { |
2476 | return out_opr_float(buf, buf_size, po, popr, 1, need_float_stack); |
2477 | } |
2478 | |
d4a985bd |
2479 | static char *out_dst_opr_float(char *buf, size_t buf_size, |
fe18df39 |
2480 | struct parsed_op *po, struct parsed_opr *popr, int need_float_stack) |
d4a985bd |
2481 | { |
2c31fb4c |
2482 | return out_opr_float(buf, buf_size, po, popr, 0, need_float_stack); |
d4a985bd |
2483 | } |
2484 | |
91977a1c |
2485 | static void out_test_for_cc(char *buf, size_t buf_size, |
940e8e66 |
2486 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv, |
69a3cdfc |
2487 | enum opr_lenmod lmod, const char *expr) |
91977a1c |
2488 | { |
69a3cdfc |
2489 | const char *cast, *scast; |
91977a1c |
2490 | |
69a3cdfc |
2491 | cast = lmod_cast_u(po, lmod); |
2492 | scast = lmod_cast_s(po, lmod); |
2493 | |
2494 | switch (pfo) { |
2495 | case PFO_Z: |
8c83cc48 |
2496 | case PFO_BE: // CF==1||ZF==1; CF=0 |
850c9265 |
2497 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
2498 | cast, expr, is_inv ? "!=" : "=="); |
91977a1c |
2499 | break; |
850c9265 |
2500 | |
5101a5f9 |
2501 | case PFO_S: |
2502 | case PFO_L: // SF!=OF; OF=0 |
2503 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
2504 | scast, expr, is_inv ? ">=" : "<"); |
5101a5f9 |
2505 | break; |
2506 | |
8c83cc48 |
2507 | case PFO_LE: // ZF==1||SF!=OF; OF=0 |
69a3cdfc |
2508 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
2509 | scast, expr, is_inv ? ">" : "<="); |
850c9265 |
2510 | break; |
2511 | |
8c83cc48 |
2512 | case PFO_C: // CF=0 |
2513 | case PFO_O: // OF=0 |
2514 | snprintf(buf, buf_size, "(%d)", !!is_inv); |
2515 | break; |
2516 | |
2c31fb4c |
2517 | case PFO_P: // PF==1 |
2518 | snprintf(buf, buf_size, "(%sdo_parity(%s))", |
2519 | is_inv ? "!" : "", expr); |
2520 | break; |
2521 | |
91977a1c |
2522 | default: |
69a3cdfc |
2523 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
91977a1c |
2524 | } |
2525 | } |
c36e914d |
2526 | |
850c9265 |
2527 | static void out_cmp_for_cc(char *buf, size_t buf_size, |
16057ce1 |
2528 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv, |
2529 | int is_neg) |
850c9265 |
2530 | { |
a2c1d768 |
2531 | const char *cast, *scast, *cast_use; |
2532 | char buf1[256], buf2[256]; |
2533 | enum opr_lenmod lmod; |
2534 | |
90307a99 |
2535 | if (po->op != OP_DEC && po->operand[0].lmod != po->operand[1].lmod) |
a2c1d768 |
2536 | ferr(po, "%s: lmod mismatch: %d %d\n", __func__, |
2537 | po->operand[0].lmod, po->operand[1].lmod); |
2538 | lmod = po->operand[0].lmod; |
850c9265 |
2539 | |
69a3cdfc |
2540 | cast = lmod_cast_u(po, lmod); |
2541 | scast = lmod_cast_s(po, lmod); |
850c9265 |
2542 | |
a2c1d768 |
2543 | switch (pfo) { |
2544 | case PFO_C: |
2545 | case PFO_Z: |
2546 | case PFO_BE: // !a |
2547 | cast_use = cast; |
2548 | break; |
2549 | |
2550 | case PFO_S: |
2551 | case PFO_L: // !ge |
2552 | case PFO_LE: |
2553 | cast_use = scast; |
2554 | break; |
2555 | |
2556 | default: |
2557 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
2558 | } |
2559 | |
2560 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], cast_use, 0); |
90307a99 |
2561 | if (po->op == OP_DEC) |
2562 | snprintf(buf2, sizeof(buf2), "1"); |
16057ce1 |
2563 | else { |
2564 | char cast_op2[64]; |
2565 | snprintf(cast_op2, sizeof(cast_op2) - 1, "%s", cast_use); |
2566 | if (is_neg) |
2567 | strcat(cast_op2, "-"); |
2568 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], cast_op2, 0); |
2569 | } |
a2c1d768 |
2570 | |
69a3cdfc |
2571 | switch (pfo) { |
5101a5f9 |
2572 | case PFO_C: |
2573 | // note: must be unsigned compare |
a2c1d768 |
2574 | snprintf(buf, buf_size, "(%s %s %s)", |
2575 | buf1, is_inv ? ">=" : "<", buf2); |
5101a5f9 |
2576 | break; |
2577 | |
69a3cdfc |
2578 | case PFO_Z: |
a2c1d768 |
2579 | snprintf(buf, buf_size, "(%s %s %s)", |
2580 | buf1, is_inv ? "!=" : "==", buf2); |
850c9265 |
2581 | break; |
2582 | |
5101a5f9 |
2583 | case PFO_BE: // !a |
850c9265 |
2584 | // note: must be unsigned compare |
a2c1d768 |
2585 | snprintf(buf, buf_size, "(%s %s %s)", |
2586 | buf1, is_inv ? ">" : "<=", buf2); |
2587 | |
2588 | // annoying case |
2589 | if (is_inv && lmod == OPLM_BYTE |
2590 | && po->operand[1].type == OPT_CONST |
2591 | && po->operand[1].val == 0xff) |
2592 | { |
2593 | snprintf(g_comment, sizeof(g_comment), "if %s", buf); |
2594 | snprintf(buf, buf_size, "(0)"); |
2595 | } |
5101a5f9 |
2596 | break; |
2597 | |
2598 | // note: must be signed compare |
2599 | case PFO_S: |
2600 | snprintf(buf, buf_size, "(%s(%s - %s) %s 0)", |
a2c1d768 |
2601 | scast, buf1, buf2, is_inv ? ">=" : "<"); |
850c9265 |
2602 | break; |
2603 | |
5101a5f9 |
2604 | case PFO_L: // !ge |
a2c1d768 |
2605 | snprintf(buf, buf_size, "(%s %s %s)", |
2606 | buf1, is_inv ? ">=" : "<", buf2); |
850c9265 |
2607 | break; |
2608 | |
90307a99 |
2609 | case PFO_LE: // !g |
a2c1d768 |
2610 | snprintf(buf, buf_size, "(%s %s %s)", |
2611 | buf1, is_inv ? ">" : "<=", buf2); |
5101a5f9 |
2612 | break; |
2613 | |
850c9265 |
2614 | default: |
a2c1d768 |
2615 | break; |
850c9265 |
2616 | } |
2617 | } |
2618 | |
69a3cdfc |
2619 | static void out_cmp_test(char *buf, size_t buf_size, |
940e8e66 |
2620 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv) |
69a3cdfc |
2621 | { |
2622 | char buf1[256], buf2[256], buf3[256]; |
2623 | |
2624 | if (po->op == OP_TEST) { |
2625 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
3ebea2cf |
2626 | out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[0]); |
69a3cdfc |
2627 | } |
2628 | else { |
3ebea2cf |
2629 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
2630 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
69a3cdfc |
2631 | snprintf(buf3, sizeof(buf3), "(%s & %s)", buf1, buf2); |
2632 | } |
940e8e66 |
2633 | out_test_for_cc(buf, buf_size, po, pfo, is_inv, |
69a3cdfc |
2634 | po->operand[0].lmod, buf3); |
2635 | } |
2636 | else if (po->op == OP_CMP) { |
16057ce1 |
2637 | out_cmp_for_cc(buf, buf_size, po, pfo, is_inv, 0); |
69a3cdfc |
2638 | } |
2639 | else |
2640 | ferr(po, "%s: unhandled op: %d\n", __func__, po->op); |
2641 | } |
2642 | |
850c9265 |
2643 | static void propagate_lmod(struct parsed_op *po, struct parsed_opr *popr1, |
91977a1c |
2644 | struct parsed_opr *popr2) |
2645 | { |
2646 | if (popr1->lmod == OPLM_UNSPEC && popr2->lmod == OPLM_UNSPEC) |
2647 | ferr(po, "missing lmod for both operands\n"); |
2648 | |
2649 | if (popr1->lmod == OPLM_UNSPEC) |
2650 | popr1->lmod = popr2->lmod; |
2651 | else if (popr2->lmod == OPLM_UNSPEC) |
2652 | popr2->lmod = popr1->lmod; |
a3684be1 |
2653 | else if (popr1->lmod != popr2->lmod) { |
2654 | if (popr1->type_from_var) { |
2655 | popr1->size_mismatch = 1; |
2656 | if (popr1->lmod < popr2->lmod) |
2657 | popr1->size_lt = 1; |
2658 | popr1->lmod = popr2->lmod; |
2659 | } |
2660 | else if (popr2->type_from_var) { |
2661 | popr2->size_mismatch = 1; |
2662 | if (popr2->lmod < popr1->lmod) |
2663 | popr2->size_lt = 1; |
2664 | popr2->lmod = popr1->lmod; |
2665 | } |
2666 | else |
2667 | ferr(po, "conflicting lmods: %d vs %d\n", |
2668 | popr1->lmod, popr2->lmod); |
2669 | } |
91977a1c |
2670 | } |
c36e914d |
2671 | |
850c9265 |
2672 | static const char *op_to_c(struct parsed_op *po) |
2673 | { |
2674 | switch (po->op) |
2675 | { |
2676 | case OP_ADD: |
5101a5f9 |
2677 | case OP_ADC: |
850c9265 |
2678 | return "+"; |
2679 | case OP_SUB: |
5101a5f9 |
2680 | case OP_SBB: |
850c9265 |
2681 | return "-"; |
2682 | case OP_AND: |
2683 | return "&"; |
2684 | case OP_OR: |
2685 | return "|"; |
2686 | case OP_XOR: |
2687 | return "^"; |
2688 | case OP_SHL: |
2689 | return "<<"; |
2690 | case OP_SHR: |
2691 | return ">>"; |
2692 | case OP_MUL: |
2693 | case OP_IMUL: |
2694 | return "*"; |
2695 | default: |
2696 | ferr(po, "op_to_c was supplied with %d\n", po->op); |
2697 | } |
2698 | } |
2699 | |
de50b98b |
2700 | // last op in stream - unconditional branch or ret |
2701 | #define LAST_OP(_i) ((ops[_i].flags & OPF_TAIL) \ |
092f64e1 |
2702 | || ((ops[_i].flags & (OPF_JMP|OPF_CJMP|OPF_RMD)) == OPF_JMP \ |
037f4971 |
2703 | && ops[_i].op != OP_CALL)) |
de50b98b |
2704 | |
db63af51 |
2705 | #define check_i(po, i) \ |
2706 | if ((i) < 0) \ |
2707 | ferr(po, "bad " #i ": %d\n", i) |
2708 | |
e83ea7ed |
2709 | // note: this skips over calls and rm'd stuff assuming they're handled |
2710 | // so it's intended to use at one of final passes |
7a3c5555 |
2711 | // exception: doesn't skip OPF_RSAVE stuff |
e83ea7ed |
2712 | static int scan_for_pop(int i, int opcnt, int magic, int reg, |
7a3c5555 |
2713 | int depth, int seen_noreturn, int save_level, int flags_set) |
850c9265 |
2714 | { |
87bf6cec |
2715 | struct parsed_op *po; |
e83ea7ed |
2716 | int relevant; |
87bf6cec |
2717 | int ret = 0; |
4c45fa73 |
2718 | int j; |
87bf6cec |
2719 | |
850c9265 |
2720 | for (; i < opcnt; i++) { |
87bf6cec |
2721 | po = &ops[i]; |
2722 | if (po->cc_scratch == magic) |
b2bd20c0 |
2723 | return ret; // already checked |
87bf6cec |
2724 | po->cc_scratch = magic; |
2725 | |
89ff3147 |
2726 | if (po->flags & OPF_TAIL) { |
7a3c5555 |
2727 | if (po->op == OP_CALL && po->pp != NULL && po->pp->is_noreturn) { |
2728 | // msvc sometimes generates stack cleanup code after |
2729 | // noreturn, set a flag and continue |
2730 | seen_noreturn = 1; |
2731 | |
2732 | // ... but stop if there is another path to next insn - |
2733 | // if msvc skipped something stack tracking may mess up |
2734 | if (i + 1 < opcnt && g_labels[i + 1] != NULL) |
0ea6430c |
2735 | goto out; |
89ff3147 |
2736 | } |
93b5bd18 |
2737 | else |
0ea6430c |
2738 | goto out; |
89ff3147 |
2739 | } |
87bf6cec |
2740 | |
7a3c5555 |
2741 | if (po->flags & OPF_FARG) |
850c9265 |
2742 | continue; |
7a3c5555 |
2743 | if (po->flags & (OPF_RMD|OPF_DONE)) { |
2744 | if (!(po->flags & OPF_RSAVE)) |
2745 | continue; |
2746 | // reprocess, there might be another push in some "parallel" |
2747 | // path that took a pop what we should also take |
2748 | } |
850c9265 |
2749 | |
87bf6cec |
2750 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
4c45fa73 |
2751 | if (po->btj != NULL) { |
2752 | // jumptable |
da87ae38 |
2753 | for (j = 0; j < po->btj->count; j++) { |
db63af51 |
2754 | check_i(po, po->btj->d[j].bt_i); |
e83ea7ed |
2755 | ret |= scan_for_pop(po->btj->d[j].bt_i, opcnt, magic, reg, |
7a3c5555 |
2756 | depth, seen_noreturn, save_level, flags_set); |
4c45fa73 |
2757 | if (ret < 0) |
2758 | return ret; // dead end |
2759 | } |
da87ae38 |
2760 | return ret; |
4c45fa73 |
2761 | } |
2762 | |
db63af51 |
2763 | check_i(po, po->bt_i); |
5c024ef7 |
2764 | if (po->flags & OPF_CJMP) { |
e83ea7ed |
2765 | ret |= scan_for_pop(po->bt_i, opcnt, magic, reg, |
7a3c5555 |
2766 | depth, seen_noreturn, save_level, flags_set); |
87bf6cec |
2767 | if (ret < 0) |
2768 | return ret; // dead end |
2769 | } |
2770 | else { |
2771 | i = po->bt_i - 1; |
2772 | } |
2773 | continue; |
2774 | } |
2775 | |
e83ea7ed |
2776 | relevant = 0; |
d4e3b5db |
2777 | if ((po->op == OP_POP || po->op == OP_PUSH) |
e83ea7ed |
2778 | && po->operand[0].type == OPT_REG && po->operand[0].reg == reg) |
87bf6cec |
2779 | { |
e83ea7ed |
2780 | relevant = 1; |
2781 | } |
2782 | |
2783 | if (po->op == OP_PUSH) { |
2784 | depth++; |
e83ea7ed |
2785 | } |
2786 | else if (po->op == OP_POP) { |
b2bd20c0 |
2787 | if (relevant && depth == 0) { |
7a3c5555 |
2788 | if (flags_set == 0 && save_level > 0) { |
2789 | ret = scan_for_pop(i + 1, opcnt, magic, reg, |
2790 | depth, seen_noreturn, save_level - 1, flags_set); |
2791 | if (ret != 1) |
2792 | // no pop for other levels, current one must be false |
2793 | return -1; |
2794 | } |
b2bd20c0 |
2795 | po->flags |= flags_set; |
e83ea7ed |
2796 | return 1; |
2797 | } |
b2bd20c0 |
2798 | depth--; |
87bf6cec |
2799 | } |
850c9265 |
2800 | } |
2801 | |
0ea6430c |
2802 | out: |
93b5bd18 |
2803 | // for noreturn, assume msvc skipped stack cleanup |
2804 | return seen_noreturn ? 1 : -1; |
850c9265 |
2805 | } |
2806 | |
e83ea7ed |
2807 | // scan for 'reg' pop backwards starting from i |
2808 | // intended to use for register restore search, so other reg |
2809 | // references are considered an error |
2810 | static int scan_for_rsave_pop_reg(int i, int magic, int reg, int set_flags) |
850c9265 |
2811 | { |
e83ea7ed |
2812 | struct parsed_op *po; |
2813 | struct label_ref *lr; |
2814 | int ret = 0; |
2815 | |
2816 | ops[i].cc_scratch = magic; |
2817 | |
2818 | while (1) |
2819 | { |
2820 | if (g_labels[i] != NULL) { |
2821 | lr = &g_label_refs[i]; |
2822 | for (; lr != NULL; lr = lr->next) { |
2823 | check_i(&ops[i], lr->i); |
2824 | ret |= scan_for_rsave_pop_reg(lr->i, magic, reg, set_flags); |
2825 | if (ret < 0) |
2826 | return ret; |
2827 | } |
2828 | if (i > 0 && LAST_OP(i - 1)) |
2829 | return ret; |
2830 | } |
2831 | |
2832 | i--; |
2833 | if (i < 0) |
2834 | break; |
2835 | |
2836 | if (ops[i].cc_scratch == magic) |
2837 | return ret; |
2838 | ops[i].cc_scratch = magic; |
2839 | |
2840 | po = &ops[i]; |
2841 | if (po->op == OP_POP && po->operand[0].reg == reg) { |
2842 | if (po->flags & (OPF_RMD|OPF_DONE)) |
2843 | return -1; |
2844 | |
2845 | po->flags |= set_flags; |
2846 | return 1; |
2847 | } |
2848 | |
2849 | // this also covers the case where we reach corresponding push |
2850 | if ((po->regmask_dst | po->regmask_src) & (1 << reg)) |
2851 | return -1; |
2852 | } |
2853 | |
56b49358 |
2854 | // nothing interesting on this path, |
2855 | // still return ret for something recursive calls could find |
2856 | return ret; |
e83ea7ed |
2857 | } |
2858 | |
2859 | static void find_reachable_exits(int i, int opcnt, int magic, |
2860 | int *exits, int *exit_count) |
2861 | { |
2862 | struct parsed_op *po; |
850c9265 |
2863 | int j; |
2864 | |
e83ea7ed |
2865 | for (; i < opcnt; i++) |
2866 | { |
2867 | po = &ops[i]; |
2868 | if (po->cc_scratch == magic) |
2869 | return; |
2870 | po->cc_scratch = magic; |
2871 | |
2872 | if (po->flags & OPF_TAIL) { |
2873 | ferr_assert(po, *exit_count < MAX_EXITS); |
2874 | exits[*exit_count] = i; |
2875 | (*exit_count)++; |
2876 | return; |
2877 | } |
850c9265 |
2878 | |
e83ea7ed |
2879 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
2880 | if (po->flags & OPF_RMD) |
69a3cdfc |
2881 | continue; |
850c9265 |
2882 | |
e83ea7ed |
2883 | if (po->btj != NULL) { |
2884 | for (j = 0; j < po->btj->count; j++) { |
2885 | check_i(po, po->btj->d[j].bt_i); |
2886 | find_reachable_exits(po->btj->d[j].bt_i, opcnt, magic, |
2887 | exits, exit_count); |
2888 | } |
2889 | return; |
850c9265 |
2890 | } |
2891 | |
e83ea7ed |
2892 | check_i(po, po->bt_i); |
2893 | if (po->flags & OPF_CJMP) |
2894 | find_reachable_exits(po->bt_i, opcnt, magic, exits, exit_count); |
2895 | else |
2896 | i = po->bt_i - 1; |
2897 | continue; |
850c9265 |
2898 | } |
2899 | } |
e83ea7ed |
2900 | } |
2901 | |
2902 | // scan for 'reg' pop backwards starting from exits (all paths) |
2903 | static int scan_for_pop_ret(int i, int opcnt, int reg, int set_flags) |
2904 | { |
2905 | static int exits[MAX_EXITS]; |
2906 | static int exit_count; |
56b49358 |
2907 | int found = 0; |
2908 | int e, j, ret; |
850c9265 |
2909 | |
e83ea7ed |
2910 | if (!set_flags) { |
2911 | exit_count = 0; |
2912 | find_reachable_exits(i, opcnt, i + opcnt * 15, exits, |
2913 | &exit_count); |
2914 | ferr_assert(&ops[i], exit_count > 0); |
2915 | } |
2916 | |
2917 | for (j = 0; j < exit_count; j++) { |
56b49358 |
2918 | e = exits[j]; |
2919 | ret = scan_for_rsave_pop_reg(e, i + opcnt * 16 + set_flags, |
e83ea7ed |
2920 | reg, set_flags); |
56b49358 |
2921 | if (ret != -1) { |
2922 | found |= ret; |
2923 | continue; |
2924 | } |
2925 | if (ops[e].op == OP_CALL && ops[e].pp != NULL |
2926 | && ops[e].pp->is_noreturn) |
2927 | { |
2928 | // assume stack cleanup was skipped |
2929 | continue; |
2930 | } |
2931 | return -1; |
e83ea7ed |
2932 | } |
2933 | |
56b49358 |
2934 | return found; |
850c9265 |
2935 | } |
2936 | |
e83ea7ed |
2937 | // scan for one or more pop of push <const> |
2938 | static int scan_for_pop_const_r(int i, int opcnt, int magic, |
2939 | int push_i, int is_probe) |
9af2d373 |
2940 | { |
25a330eb |
2941 | struct parsed_op *po; |
e83ea7ed |
2942 | struct label_ref *lr; |
2943 | int ret = 0; |
9af2d373 |
2944 | int j; |
2945 | |
e83ea7ed |
2946 | for (; i < opcnt; i++) |
2947 | { |
2948 | po = &ops[i]; |
2949 | if (po->cc_scratch == magic) |
2950 | return ret; // already checked |
2951 | po->cc_scratch = magic; |
2952 | |
2953 | if (po->flags & OPF_JMP) { |
2954 | if (po->flags & OPF_RMD) |
2955 | continue; |
2956 | if (po->op == OP_CALL) |
2957 | return -1; |
2958 | |
2959 | if (po->btj != NULL) { |
2960 | for (j = 0; j < po->btj->count; j++) { |
2961 | check_i(po, po->btj->d[j].bt_i); |
2962 | ret |= scan_for_pop_const_r(po->btj->d[j].bt_i, opcnt, magic, |
2963 | push_i, is_probe); |
2964 | if (ret < 0) |
2965 | return ret; |
2966 | } |
2967 | return ret; |
2968 | } |
25a330eb |
2969 | |
e83ea7ed |
2970 | check_i(po, po->bt_i); |
2971 | if (po->flags & OPF_CJMP) { |
2972 | ret |= scan_for_pop_const_r(po->bt_i, opcnt, magic, push_i, |
2973 | is_probe); |
2974 | if (ret < 0) |
2975 | return ret; |
2976 | } |
2977 | else { |
2978 | i = po->bt_i - 1; |
2979 | } |
25a330eb |
2980 | continue; |
2981 | } |
2982 | |
e83ea7ed |
2983 | if ((po->flags & (OPF_TAIL|OPF_RSAVE)) || po->op == OP_PUSH) |
2984 | return -1; |
2985 | |
2986 | if (g_labels[i] != NULL) { |
2987 | // all refs must be visited |
2988 | lr = &g_label_refs[i]; |
2989 | for (; lr != NULL; lr = lr->next) { |
2990 | check_i(po, lr->i); |
2991 | if (ops[lr->i].cc_scratch != magic) |
2992 | return -1; |
2993 | } |
2994 | if (i > 0 && !LAST_OP(i - 1) && ops[i - 1].cc_scratch != magic) |
2995 | return -1; |
2996 | } |
2997 | |
2998 | if (po->op == OP_POP) |
9af2d373 |
2999 | { |
e83ea7ed |
3000 | if (po->flags & (OPF_RMD|OPF_DONE)) |
3001 | return -1; |
3002 | |
3003 | if (!is_probe) { |
3004 | po->flags |= OPF_DONE; |
3005 | po->datap = &ops[push_i]; |
3006 | } |
3007 | return 1; |
9af2d373 |
3008 | } |
e83ea7ed |
3009 | } |
9af2d373 |
3010 | |
e83ea7ed |
3011 | return -1; |
3012 | } |
25a330eb |
3013 | |
e83ea7ed |
3014 | static void scan_for_pop_const(int i, int opcnt, int magic) |
3015 | { |
3016 | int ret; |
3017 | |
3018 | ret = scan_for_pop_const_r(i + 1, opcnt, magic, i, 1); |
3019 | if (ret == 1) { |
3020 | ops[i].flags |= OPF_RMD | OPF_DONE; |
3021 | scan_for_pop_const_r(i + 1, opcnt, magic + 1, i, 0); |
3022 | } |
3023 | } |
3024 | |
3025 | // check if all branch targets within a marked path are also marked |
3026 | // note: the path checked must not be empty or end with a branch |
3027 | static int check_path_branches(int opcnt, int magic) |
3028 | { |
3029 | struct parsed_op *po; |
3030 | int i, j; |
3031 | |
3032 | for (i = 0; i < opcnt; i++) { |
3033 | po = &ops[i]; |
3034 | if (po->cc_scratch != magic) |
3035 | continue; |
3036 | |
3037 | if (po->flags & OPF_JMP) { |
3038 | if ((po->flags & OPF_RMD) || po->op == OP_CALL) |
3039 | continue; |
3040 | |
3041 | if (po->btj != NULL) { |
3042 | for (j = 0; j < po->btj->count; j++) { |
3043 | check_i(po, po->btj->d[j].bt_i); |
3044 | if (ops[po->btj->d[j].bt_i].cc_scratch != magic) |
3045 | return 0; |
3046 | } |
25a330eb |
3047 | } |
e83ea7ed |
3048 | |
3049 | check_i(po, po->bt_i); |
3050 | if (ops[po->bt_i].cc_scratch != magic) |
3051 | return 0; |
3052 | if ((po->flags & OPF_CJMP) && ops[i + 1].cc_scratch != magic) |
3053 | return 0; |
3054 | } |
3055 | } |
3056 | |
3057 | return 1; |
3058 | } |
3059 | |
3060 | // scan for multiple pushes for given pop |
3061 | static int scan_pushes_for_pop_r(int i, int magic, int pop_i, |
3062 | int is_probe) |
3063 | { |
3064 | int reg = ops[pop_i].operand[0].reg; |
3065 | struct parsed_op *po; |
3066 | struct label_ref *lr; |
3067 | int ret = 0; |
3068 | |
3069 | ops[i].cc_scratch = magic; |
3070 | |
3071 | while (1) |
3072 | { |
3073 | if (g_labels[i] != NULL) { |
3074 | lr = &g_label_refs[i]; |
3075 | for (; lr != NULL; lr = lr->next) { |
3076 | check_i(&ops[i], lr->i); |
3077 | ret |= scan_pushes_for_pop_r(lr->i, magic, pop_i, is_probe); |
3078 | if (ret < 0) |
3079 | return ret; |
25a330eb |
3080 | } |
e83ea7ed |
3081 | if (i > 0 && LAST_OP(i - 1)) |
3082 | return ret; |
3083 | } |
3084 | |
3085 | i--; |
3086 | if (i < 0) |
9af2d373 |
3087 | break; |
e83ea7ed |
3088 | |
3089 | if (ops[i].cc_scratch == magic) |
3090 | return ret; |
3091 | ops[i].cc_scratch = magic; |
3092 | |
3093 | po = &ops[i]; |
3094 | if (po->op == OP_CALL) |
3095 | return -1; |
3096 | if ((po->flags & (OPF_TAIL|OPF_RSAVE)) || po->op == OP_POP) |
3097 | return -1; |
3098 | |
3099 | if (po->op == OP_PUSH) |
3100 | { |
3101 | if (po->datap != NULL) |
3102 | return -1; |
3103 | if (po->operand[0].type == OPT_REG && po->operand[0].reg == reg) |
3104 | // leave this case for reg save/restore handlers |
3105 | return -1; |
3106 | |
3107 | if (!is_probe) { |
3108 | po->flags |= OPF_PPUSH | OPF_DONE; |
3109 | po->datap = &ops[pop_i]; |
3110 | } |
3111 | return 1; |
3112 | } |
3113 | } |
3114 | |
3115 | return -1; |
3116 | } |
3117 | |
3118 | static void scan_pushes_for_pop(int i, int opcnt, int *regmask_pp) |
3119 | { |
3120 | int magic = i + opcnt * 14; |
3121 | int ret; |
3122 | |
3123 | ret = scan_pushes_for_pop_r(i, magic, i, 1); |
3124 | if (ret == 1) { |
3125 | ret = check_path_branches(opcnt, magic); |
3126 | if (ret == 1) { |
3127 | ops[i].flags |= OPF_PPUSH | OPF_DONE; |
3128 | *regmask_pp |= 1 << ops[i].operand[0].reg; |
3129 | scan_pushes_for_pop_r(i, magic + 1, i, 0); |
9af2d373 |
3130 | } |
3131 | } |
3132 | } |
3133 | |
591721d7 |
3134 | static void scan_propagate_df(int i, int opcnt) |
3135 | { |
3136 | struct parsed_op *po = &ops[i]; |
3137 | int j; |
3138 | |
3139 | for (; i < opcnt; i++) { |
3140 | po = &ops[i]; |
3141 | if (po->flags & OPF_DF) |
3142 | return; // already resolved |
3143 | po->flags |= OPF_DF; |
3144 | |
3145 | if (po->op == OP_CALL) |
3146 | ferr(po, "call with DF set?\n"); |
3147 | |
3148 | if (po->flags & OPF_JMP) { |
3149 | if (po->btj != NULL) { |
3150 | // jumptable |
db63af51 |
3151 | for (j = 0; j < po->btj->count; j++) { |
3152 | check_i(po, po->btj->d[j].bt_i); |
591721d7 |
3153 | scan_propagate_df(po->btj->d[j].bt_i, opcnt); |
db63af51 |
3154 | } |
591721d7 |
3155 | return; |
3156 | } |
3157 | |
b2bd20c0 |
3158 | if (po->flags & OPF_RMD) |
3159 | continue; |
db63af51 |
3160 | check_i(po, po->bt_i); |
5c024ef7 |
3161 | if (po->flags & OPF_CJMP) |
591721d7 |
3162 | scan_propagate_df(po->bt_i, opcnt); |
3163 | else |
3164 | i = po->bt_i - 1; |
3165 | continue; |
3166 | } |
3167 | |
3168 | if (po->flags & OPF_TAIL) |
3169 | break; |
3170 | |
3171 | if (po->op == OP_CLD) { |
5e49b270 |
3172 | po->flags |= OPF_RMD | OPF_DONE; |
591721d7 |
3173 | return; |
3174 | } |
3175 | } |
3176 | |
3177 | ferr(po, "missing DF clear?\n"); |
3178 | } |
3179 | |
db63af51 |
3180 | // is operand 'opr' referenced by parsed_op 'po'? |
3181 | static int is_opr_referenced(const struct parsed_opr *opr, |
3182 | const struct parsed_op *po) |
3183 | { |
3184 | int i, mask; |
3185 | |
3186 | if (opr->type == OPT_REG) { |
3187 | mask = po->regmask_dst | po->regmask_src; |
3188 | if (po->op == OP_CALL) |
3189 | mask |= (1 << xAX) | (1 << xCX) | (1 << xDX); |
3190 | if ((1 << opr->reg) & mask) |
3191 | return 1; |
3192 | else |
3193 | return 0; |
3194 | } |
3195 | |
3196 | for (i = 0; i < po->operand_cnt; i++) |
3197 | if (IS(po->operand[0].name, opr->name)) |
3198 | return 1; |
3199 | |
3200 | return 0; |
3201 | } |
3202 | |
3203 | // is operand 'opr' read by parsed_op 'po'? |
3204 | static int is_opr_read(const struct parsed_opr *opr, |
3205 | const struct parsed_op *po) |
3206 | { |
db63af51 |
3207 | if (opr->type == OPT_REG) { |
b2bd20c0 |
3208 | if (po->regmask_src & (1 << opr->reg)) |
db63af51 |
3209 | return 1; |
3210 | else |
3211 | return 0; |
3212 | } |
3213 | |
3214 | // yes I'm lazy |
3215 | return 0; |
3216 | } |
3217 | |
1cd4a663 |
3218 | // is operand 'opr' modified by parsed_op 'po'? |
5101a5f9 |
3219 | static int is_opr_modified(const struct parsed_opr *opr, |
69a3cdfc |
3220 | const struct parsed_op *po) |
3221 | { |
89ff3147 |
3222 | int mask; |
3223 | |
89ff3147 |
3224 | if (opr->type == OPT_REG) { |
3225 | if (po->op == OP_CALL) { |
b2bd20c0 |
3226 | mask = po->regmask_dst; |
3227 | mask |= (1 << xAX) | (1 << xCX) | (1 << xDX); // ? |
3228 | if (mask & (1 << opr->reg)) |
89ff3147 |
3229 | return 1; |
3230 | else |
3231 | return 0; |
3232 | } |
3233 | |
b2bd20c0 |
3234 | if (po->regmask_dst & (1 << opr->reg)) |
3235 | return 1; |
3236 | else |
3237 | return 0; |
69a3cdfc |
3238 | } |
3239 | |
3240 | return IS(po->operand[0].name, opr->name); |
3241 | } |
3242 | |
5101a5f9 |
3243 | // is any operand of parsed_op 'po_test' modified by parsed_op 'po'? |
3244 | static int is_any_opr_modified(const struct parsed_op *po_test, |
89ff3147 |
3245 | const struct parsed_op *po, int c_mode) |
5101a5f9 |
3246 | { |
89ff3147 |
3247 | int mask; |
5101a5f9 |
3248 | int i; |
3249 | |
3250 | if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA)) |
3251 | return 0; |
3252 | |
de50b98b |
3253 | if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST) |
3254 | return 0; |
3255 | |
3256 | if ((po_test->regmask_src | po_test->regmask_dst) & po->regmask_dst) |
3257 | return 1; |
3258 | |
3259 | // in reality, it can wreck any register, but in decompiled C |
2b43685d |
3260 | // version it can only overwrite eax or edx:eax |
89ff3147 |
3261 | mask = (1 << xAX) | (1 << xDX); |
3262 | if (!c_mode) |
3263 | mask |= 1 << xCX; |
3264 | |
de50b98b |
3265 | if (po->op == OP_CALL |
89ff3147 |
3266 | && ((po_test->regmask_src | po_test->regmask_dst) & mask)) |
5101a5f9 |
3267 | return 1; |
3268 | |
3269 | for (i = 0; i < po_test->operand_cnt; i++) |
3270 | if (IS(po_test->operand[i].name, po->operand[0].name)) |
3271 | return 1; |
3272 | |
3273 | return 0; |
3274 | } |
3275 | |
940e8e66 |
3276 | // scan for any po_test operand modification in range given |
89ff3147 |
3277 | static int scan_for_mod(struct parsed_op *po_test, int i, int opcnt, |
3278 | int c_mode) |
69a3cdfc |
3279 | { |
2b43685d |
3280 | if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST) |
3281 | return -1; |
3282 | |
69a3cdfc |
3283 | for (; i < opcnt; i++) { |
89ff3147 |
3284 | if (is_any_opr_modified(po_test, &ops[i], c_mode)) |
69a3cdfc |
3285 | return i; |
3286 | } |
3287 | |
3288 | return -1; |
3289 | } |
3290 | |
940e8e66 |
3291 | // scan for po_test operand[0] modification in range given |
3292 | static int scan_for_mod_opr0(struct parsed_op *po_test, |
3293 | int i, int opcnt) |
3294 | { |
3295 | for (; i < opcnt; i++) { |
3296 | if (is_opr_modified(&po_test->operand[0], &ops[i])) |
3297 | return i; |
3298 | } |
3299 | |
3300 | return -1; |
3301 | } |
3302 | |
7f20f633 |
3303 | static int try_resolve_const(int i, const struct parsed_opr *opr, |
3304 | int magic, unsigned int *val); |
3305 | |
3306 | static int scan_for_flag_set(int i, int opcnt, int magic, |
3307 | int *branched, int *setters, int *setter_cnt) |
69a3cdfc |
3308 | { |
04f8a628 |
3309 | struct label_ref *lr; |
2b43685d |
3310 | int ret; |
de50b98b |
3311 | |
3312 | while (i >= 0) { |
04f8a628 |
3313 | if (ops[i].cc_scratch == magic) { |
04abc5d6 |
3314 | // is this a problem? |
3315 | //ferr(&ops[i], "%s looped\n", __func__); |
3316 | return 0; |
04f8a628 |
3317 | } |
3318 | ops[i].cc_scratch = magic; |
3319 | |
d7857c3a |
3320 | if (g_labels[i] != NULL) { |
2b43685d |
3321 | *branched = 1; |
04f8a628 |
3322 | |
3323 | lr = &g_label_refs[i]; |
3324 | for (; lr->next; lr = lr->next) { |
92d715b6 |
3325 | check_i(&ops[i], lr->i); |
7f20f633 |
3326 | ret = scan_for_flag_set(lr->i, opcnt, magic, |
04f8a628 |
3327 | branched, setters, setter_cnt); |
3328 | if (ret < 0) |
3329 | return ret; |
3330 | } |
3331 | |
92d715b6 |
3332 | check_i(&ops[i], lr->i); |
de50b98b |
3333 | if (i > 0 && LAST_OP(i - 1)) { |
94d447fb |
3334 | i = lr->i; |
de50b98b |
3335 | continue; |
3336 | } |
7f20f633 |
3337 | ret = scan_for_flag_set(lr->i, opcnt, magic, |
04f8a628 |
3338 | branched, setters, setter_cnt); |
2b43685d |
3339 | if (ret < 0) |
3340 | return ret; |
de50b98b |
3341 | } |
3342 | i--; |
3343 | |
2b43685d |
3344 | if (ops[i].flags & OPF_FLAGS) { |
3345 | setters[*setter_cnt] = i; |
3346 | (*setter_cnt)++; |
7f20f633 |
3347 | |
3348 | if (ops[i].flags & OPF_REP) { |
3349 | struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, xCX); |
3350 | unsigned int uval; |
3351 | |
3352 | ret = try_resolve_const(i, &opr, i + opcnt * 7, &uval); |
3353 | if (ret != 1 || uval == 0) { |
3354 | // can't treat it as full setter because of ecx=0 case, |
3355 | // also disallow delayed compare |
3356 | *branched = 1; |
3357 | continue; |
3358 | } |
3359 | } |
3360 | |
2b43685d |
3361 | return 0; |
3362 | } |
69a3cdfc |
3363 | |
5c024ef7 |
3364 | if ((ops[i].flags & (OPF_JMP|OPF_CJMP)) == OPF_JMP) |
69a3cdfc |
3365 | return -1; |
69a3cdfc |
3366 | } |
3367 | |
3368 | return -1; |
3369 | } |
3370 | |
5101a5f9 |
3371 | // scan back for cdq, if anything modifies edx, fail |
3372 | static int scan_for_cdq_edx(int i) |
3373 | { |
cdfaeed7 |
3374 | while (i >= 0) { |
d7857c3a |
3375 | if (g_labels[i] != NULL) { |
cdfaeed7 |
3376 | if (g_label_refs[i].next != NULL) |
3377 | return -1; |
3378 | if (i > 0 && LAST_OP(i - 1)) { |
3379 | i = g_label_refs[i].i; |
3380 | continue; |
3381 | } |
3382 | return -1; |
3383 | } |
3384 | i--; |
3385 | |
5101a5f9 |
3386 | if (ops[i].op == OP_CDQ) |
3387 | return i; |
3388 | |
3389 | if (ops[i].regmask_dst & (1 << xDX)) |
3390 | return -1; |
5101a5f9 |
3391 | } |
3392 | |
3393 | return -1; |
3394 | } |
3395 | |
64c59faf |
3396 | static int scan_for_reg_clear(int i, int reg) |
3397 | { |
cdfaeed7 |
3398 | while (i >= 0) { |
d7857c3a |
3399 | if (g_labels[i] != NULL) { |
cdfaeed7 |
3400 | if (g_label_refs[i].next != NULL) |
3401 | return -1; |
3402 | if (i > 0 && LAST_OP(i - 1)) { |
3403 | i = g_label_refs[i].i; |
3404 | continue; |
3405 | } |
3406 | return -1; |
3407 | } |
3408 | i--; |
3409 | |
64c59faf |
3410 | if (ops[i].op == OP_XOR |
3411 | && ops[i].operand[0].lmod == OPLM_DWORD |
3412 | && ops[i].operand[0].reg == ops[i].operand[1].reg |
3413 | && ops[i].operand[0].reg == reg) |
3414 | return i; |
3415 | |
3416 | if (ops[i].regmask_dst & (1 << reg)) |
3417 | return -1; |
64c59faf |
3418 | } |
3419 | |
3420 | return -1; |
3421 | } |
3422 | |
ee2361b9 |
3423 | static void patch_esp_adjust(struct parsed_op *po, int adj) |
3424 | { |
3425 | ferr_assert(po, po->op == OP_ADD); |
3426 | ferr_assert(po, IS(opr_name(po, 0), "esp")); |
3427 | ferr_assert(po, po->operand[1].type == OPT_CONST); |
3428 | |
3429 | // this is a bit of a hack, but deals with use of |
3430 | // single adj for multiple calls |
3431 | po->operand[1].val -= adj; |
3432 | po->flags |= OPF_RMD; |
3433 | if (po->operand[1].val == 0) |
3434 | po->flags |= OPF_DONE; |
3435 | ferr_assert(po, (int)po->operand[1].val >= 0); |
3436 | } |
3437 | |
1bafb621 |
3438 | // scan for positive, constant esp adjust |
ee2361b9 |
3439 | // multipath case is preliminary |
9af2d373 |
3440 | static int scan_for_esp_adjust(int i, int opcnt, |
ee2361b9 |
3441 | int adj_expect, int *adj, int *is_multipath, int do_update) |
1bafb621 |
3442 | { |
bfacdc83 |
3443 | int adj_expect_unknown = 0; |
7ba45c34 |
3444 | struct parsed_op *po; |
46411e6c |
3445 | int first_pop = -1; |
bfacdc83 |
3446 | int adj_best = 0; |
4741fdfe |
3447 | |
ee2361b9 |
3448 | *adj = *is_multipath = 0; |
bfacdc83 |
3449 | if (adj_expect < 0) { |
3450 | adj_expect_unknown = 1; |
3451 | adj_expect = 32 * 4; // enough? |
3452 | } |
7ba45c34 |
3453 | |
9af2d373 |
3454 | for (; i < opcnt && *adj < adj_expect; i++) { |
d7857c3a |
3455 | if (g_labels[i] != NULL) |
ee2361b9 |
3456 | *is_multipath = 1; |
a2c1d768 |
3457 | |
5e49b270 |
3458 | po = &ops[i]; |
3459 | if (po->flags & OPF_DONE) |
3460 | continue; |
3461 | |
7ba45c34 |
3462 | if (po->op == OP_ADD && po->operand[0].reg == xSP) { |
3463 | if (po->operand[1].type != OPT_CONST) |
1bafb621 |
3464 | ferr(&ops[i], "non-const esp adjust?\n"); |
7ba45c34 |
3465 | *adj += po->operand[1].val; |
1bafb621 |
3466 | if (*adj & 3) |
3467 | ferr(&ops[i], "unaligned esp adjust: %x\n", *adj); |
ee2361b9 |
3468 | if (do_update) { |
3469 | if (!*is_multipath) |
3470 | patch_esp_adjust(po, adj_expect); |
3471 | else |
3472 | po->flags |= OPF_RMD; |
3473 | } |
1bafb621 |
3474 | return i; |
3475 | } |
5e49b270 |
3476 | else if (po->op == OP_PUSH) { |
5c024ef7 |
3477 | //if (first_pop == -1) |
3478 | // first_pop = -2; // none |
7ba45c34 |
3479 | *adj -= lmod_bytes(po, po->operand[0].lmod); |
46411e6c |
3480 | } |
5e49b270 |
3481 | else if (po->op == OP_POP) { |
91ca764a |
3482 | if (!(po->flags & OPF_DONE)) { |
3483 | // seems like msvc only uses 'pop ecx' for stack realignment.. |
3484 | if (po->operand[0].type != OPT_REG || po->operand[0].reg != xCX) |
3485 | break; |
3486 | if (first_pop == -1 && *adj >= 0) |
3487 | first_pop = i; |
3488 | } |
ee2361b9 |
3489 | if (do_update && *adj >= 0) { |
3490 | po->flags |= OPF_RMD; |
3491 | if (!*is_multipath) |
b2bd20c0 |
3492 | po->flags |= OPF_DONE | OPF_NOREGS; |
ee2361b9 |
3493 | } |
3494 | |
7ba45c34 |
3495 | *adj += lmod_bytes(po, po->operand[0].lmod); |
bfacdc83 |
3496 | if (*adj > adj_best) |
3497 | adj_best = *adj; |
46411e6c |
3498 | } |
e56ab892 |
3499 | else if (po->flags & (OPF_JMP|OPF_TAIL)) { |
4741fdfe |
3500 | if (po->op == OP_JMP && po->btj == NULL) { |
5e49b270 |
3501 | if (po->bt_i <= i) |
3502 | break; |
4741fdfe |
3503 | i = po->bt_i - 1; |
3504 | continue; |
3505 | } |
e56ab892 |
3506 | if (po->op != OP_CALL) |
a2c1d768 |
3507 | break; |
e56ab892 |
3508 | if (po->operand[0].type != OPT_LABEL) |
a2c1d768 |
3509 | break; |
91ca764a |
3510 | if (po->pp != NULL && po->pp->is_stdcall) |
89ff3147 |
3511 | break; |
bfacdc83 |
3512 | if (adj_expect_unknown && first_pop >= 0) |
3513 | break; |
91ca764a |
3514 | // assume it's another cdecl call |
e56ab892 |
3515 | } |
a2c1d768 |
3516 | } |
7ba45c34 |
3517 | |
108e9fe3 |
3518 | if (first_pop >= 0) { |
bfacdc83 |
3519 | // probably only 'pop ecx' was used |
3520 | *adj = adj_best; |
46411e6c |
3521 | return first_pop; |
1bafb621 |
3522 | } |
3523 | |
3524 | return -1; |
3525 | } |
3526 | |
a3684be1 |
3527 | static void scan_fwd_set_flags(int i, int opcnt, int magic, int flags) |
3528 | { |
3529 | struct parsed_op *po; |
3530 | int j; |
3531 | |
3532 | if (i < 0) |
3533 | ferr(ops, "%s: followed bad branch?\n", __func__); |
3534 | |
3535 | for (; i < opcnt; i++) { |
3536 | po = &ops[i]; |
3537 | if (po->cc_scratch == magic) |
3538 | return; |
3539 | po->cc_scratch = magic; |
3540 | po->flags |= flags; |
3541 | |
3542 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
3543 | if (po->btj != NULL) { |
3544 | // jumptable |
3545 | for (j = 0; j < po->btj->count; j++) |
3546 | scan_fwd_set_flags(po->btj->d[j].bt_i, opcnt, magic, flags); |
3547 | return; |
3548 | } |
3549 | |
3550 | scan_fwd_set_flags(po->bt_i, opcnt, magic, flags); |
5c024ef7 |
3551 | if (!(po->flags & OPF_CJMP)) |
a3684be1 |
3552 | return; |
3553 | } |
3554 | if (po->flags & OPF_TAIL) |
3555 | return; |
3556 | } |
3557 | } |
3558 | |
1cd4a663 |
3559 | static const struct parsed_proto *try_recover_pp( |
93b5bd18 |
3560 | struct parsed_op *po, const struct parsed_opr *opr, |
3561 | int is_call, int *search_instead) |
1cd4a663 |
3562 | { |
3563 | const struct parsed_proto *pp = NULL; |
89ff3147 |
3564 | char buf[256]; |
3565 | char *p; |
1cd4a663 |
3566 | |
193c11bf |
3567 | if (po->pp != NULL && (po->flags & OPF_DATA)) { |
3568 | // hint given in asm |
3569 | return po->pp; |
3570 | } |
3571 | |
1cd4a663 |
3572 | // maybe an arg of g_func? |
3573 | if (opr->type == OPT_REGMEM && is_stack_access(po, opr)) |
3574 | { |
3575 | char ofs_reg[16] = { 0, }; |
3576 | int arg, arg_s, arg_i; |
3577 | int stack_ra = 0; |
3578 | int offset = 0; |
3579 | |
9af2d373 |
3580 | if (g_header_mode) |
3581 | return NULL; |
3582 | |
1cd4a663 |
3583 | parse_stack_access(po, opr->name, ofs_reg, |
037f4971 |
3584 | &offset, &stack_ra, NULL, 0); |
1cd4a663 |
3585 | if (ofs_reg[0] != 0) |
3586 | ferr(po, "offset reg on arg access?\n"); |
da87ae38 |
3587 | if (offset <= stack_ra) { |
3588 | // search who set the stack var instead |
3589 | if (search_instead != NULL) |
3590 | *search_instead = 1; |
3591 | return NULL; |
3592 | } |
1cd4a663 |
3593 | |
3594 | arg_i = (offset - stack_ra - 4) / 4; |
3595 | for (arg = arg_s = 0; arg < g_func_pp->argc; arg++) { |
3596 | if (g_func_pp->arg[arg].reg != NULL) |
3597 | continue; |
3598 | if (arg_s == arg_i) |
3599 | break; |
3600 | arg_s++; |
3601 | } |
3602 | if (arg == g_func_pp->argc) |
3603 | ferr(po, "stack arg %d not in prototype?\n", arg_i); |
3604 | |
93b5bd18 |
3605 | pp = g_func_pp->arg[arg].pp; |
3606 | if (is_call) { |
3607 | if (pp == NULL) |
3608 | ferr(po, "icall arg: arg%d has no pp\n", arg + 1); |
3609 | check_func_pp(po, pp, "icall arg"); |
3610 | } |
89ff3147 |
3611 | } |
3612 | else if (opr->type == OPT_REGMEM && strchr(opr->name + 1, '[')) { |
3613 | // label[index] |
3614 | p = strchr(opr->name + 1, '['); |
3615 | memcpy(buf, opr->name, p - opr->name); |
3616 | buf[p - opr->name] = 0; |
92d715b6 |
3617 | pp = proto_parse(g_fhdr, buf, g_quiet_pp); |
1cd4a663 |
3618 | } |
3619 | else if (opr->type == OPT_OFFSET || opr->type == OPT_LABEL) { |
9af2d373 |
3620 | pp = proto_parse(g_fhdr, opr->name, g_quiet_pp); |
3621 | if (pp == NULL) { |
3622 | if (!g_header_mode) |
3623 | ferr(po, "proto_parse failed for icall to '%s'\n", opr->name); |
3624 | } |
3625 | else |
3626 | check_func_pp(po, pp, "reg-fptr ref"); |
1cd4a663 |
3627 | } |
3628 | |
3629 | return pp; |
3630 | } |
3631 | |
da87ae38 |
3632 | static void scan_for_call_type(int i, const struct parsed_opr *opr, |
db63af51 |
3633 | int magic, const struct parsed_proto **pp_found, int *pp_i, |
3634 | int *multi) |
1cd4a663 |
3635 | { |
3636 | const struct parsed_proto *pp = NULL; |
3637 | struct parsed_op *po; |
3638 | struct label_ref *lr; |
3639 | |
037f4971 |
3640 | ops[i].cc_scratch = magic; |
1cd4a663 |
3641 | |
037f4971 |
3642 | while (1) { |
d7857c3a |
3643 | if (g_labels[i] != NULL) { |
1cd4a663 |
3644 | lr = &g_label_refs[i]; |
92d715b6 |
3645 | for (; lr != NULL; lr = lr->next) { |
3646 | check_i(&ops[i], lr->i); |
db63af51 |
3647 | scan_for_call_type(lr->i, opr, magic, pp_found, pp_i, multi); |
92d715b6 |
3648 | } |
46411e6c |
3649 | if (i > 0 && LAST_OP(i - 1)) |
3650 | return; |
1cd4a663 |
3651 | } |
037f4971 |
3652 | |
1cd4a663 |
3653 | i--; |
037f4971 |
3654 | if (i < 0) |
3655 | break; |
3656 | |
3657 | if (ops[i].cc_scratch == magic) |
3658 | return; |
3659 | ops[i].cc_scratch = magic; |
1cd4a663 |
3660 | |
3661 | if (!(ops[i].flags & OPF_DATA)) |
3662 | continue; |
3663 | if (!is_opr_modified(opr, &ops[i])) |
3664 | continue; |
3665 | if (ops[i].op != OP_MOV && ops[i].op != OP_LEA) { |
3666 | // most probably trashed by some processing |
3667 | *pp_found = NULL; |
3668 | return; |
3669 | } |
3670 | |
3671 | opr = &ops[i].operand[1]; |
3672 | if (opr->type != OPT_REG) |
3673 | break; |
3674 | } |
3675 | |
3676 | po = (i >= 0) ? &ops[i] : ops; |
3677 | |
3678 | if (i < 0) { |
3679 | // reached the top - can only be an arg-reg |
04abc5d6 |
3680 | if (opr->type != OPT_REG || g_func_pp == NULL) |
1cd4a663 |
3681 | return; |
3682 | |
3683 | for (i = 0; i < g_func_pp->argc; i++) { |
3684 | if (g_func_pp->arg[i].reg == NULL) |
3685 | continue; |
3686 | if (IS(opr->name, g_func_pp->arg[i].reg)) |
3687 | break; |
3688 | } |
3689 | if (i == g_func_pp->argc) |
3690 | return; |
93b5bd18 |
3691 | pp = g_func_pp->arg[i].pp; |
1cd4a663 |
3692 | if (pp == NULL) |
46411e6c |
3693 | ferr(po, "icall: arg%d (%s) is not a fptr?\n", |
3694 | i + 1, g_func_pp->arg[i].reg); |
89ff3147 |
3695 | check_func_pp(po, pp, "icall reg-arg"); |
1cd4a663 |
3696 | } |
3697 | else |
93b5bd18 |
3698 | pp = try_recover_pp(po, opr, 1, NULL); |
1cd4a663 |
3699 | |
89ff3147 |
3700 | if (*pp_found != NULL && pp != NULL && *pp_found != pp) { |
1cd4a663 |
3701 | if (!IS((*pp_found)->ret_type.name, pp->ret_type.name) |
3702 | || (*pp_found)->is_stdcall != pp->is_stdcall |
f9327ad4 |
3703 | //|| (*pp_found)->is_fptr != pp->is_fptr |
1cd4a663 |
3704 | || (*pp_found)->argc != pp->argc |
3705 | || (*pp_found)->argc_reg != pp->argc_reg |
3706 | || (*pp_found)->argc_stack != pp->argc_stack) |
3707 | { |
3708 | ferr(po, "icall: parsed_proto mismatch\n"); |
3709 | } |
89ff3147 |
3710 | *multi = 1; |
1cd4a663 |
3711 | } |
db63af51 |
3712 | if (pp != NULL) { |
1cd4a663 |
3713 | *pp_found = pp; |
db63af51 |
3714 | *pp_i = po - ops; |
3715 | } |
1cd4a663 |
3716 | } |
3717 | |
66bdb2b0 |
3718 | static void add_label_ref(struct label_ref *lr, int op_i) |
9af2d373 |
3719 | { |
66bdb2b0 |
3720 | struct label_ref *lr_new; |
9af2d373 |
3721 | |
66bdb2b0 |
3722 | if (lr->i == -1) { |
3723 | lr->i = op_i; |
3724 | return; |
3725 | } |
9af2d373 |
3726 | |
66bdb2b0 |
3727 | lr_new = calloc(1, sizeof(*lr_new)); |
3728 | lr_new->i = op_i; |
3729 | lr_new->next = lr->next; |
3730 | lr->next = lr_new; |
3731 | } |
3732 | |
3733 | static struct parsed_data *try_resolve_jumptab(int i, int opcnt) |
3734 | { |
3735 | struct parsed_op *po = &ops[i]; |
3736 | struct parsed_data *pd; |
3737 | char label[NAMELEN], *p; |
3738 | int len, j, l; |
3739 | |
3740 | p = strchr(po->operand[0].name, '['); |
3741 | if (p == NULL) |
3742 | return NULL; |
3743 | |
3744 | len = p - po->operand[0].name; |
3745 | strncpy(label, po->operand[0].name, len); |
3746 | label[len] = 0; |
3747 | |
3748 | for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) { |
3749 | if (IS(g_func_pd[j].label, label)) { |
3750 | pd = &g_func_pd[j]; |
3751 | break; |
3752 | } |
3753 | } |
3754 | if (pd == NULL) |
3755 | //ferr(po, "label '%s' not parsed?\n", label); |
3756 | return NULL; |
3757 | |
3758 | if (pd->type != OPT_OFFSET) |
3759 | ferr(po, "label '%s' with non-offset data?\n", label); |
3760 | |
3761 | // find all labels, link |
3762 | for (j = 0; j < pd->count; j++) { |
3763 | for (l = 0; l < opcnt; l++) { |
3764 | if (g_labels[l] != NULL && IS(g_labels[l], pd->d[j].u.label)) { |
3765 | add_label_ref(&g_label_refs[l], i); |
3766 | pd->d[j].bt_i = l; |
3767 | break; |
3768 | } |
3769 | } |
3770 | } |
3771 | |
3772 | return pd; |
3773 | } |
3774 | |
3775 | static void clear_labels(int count) |
3776 | { |
3777 | int i; |
3778 | |
3779 | for (i = 0; i < count; i++) { |
3780 | if (g_labels[i] != NULL) { |
3781 | free(g_labels[i]); |
3782 | g_labels[i] = NULL; |
3783 | } |
3784 | } |
3785 | } |
3786 | |
b2bd20c0 |
3787 | static int get_pp_arg_regmask_src(const struct parsed_proto *pp) |
3788 | { |
3789 | int regmask = 0; |
3790 | int i, reg; |
3791 | |
3792 | for (i = 0; i < pp->argc; i++) { |
3793 | if (pp->arg[i].reg != NULL) { |
3794 | reg = char_array_i(regs_r32, |
3795 | ARRAY_SIZE(regs_r32), pp->arg[i].reg); |
3796 | if (reg < 0) |
3797 | ferr(ops, "arg '%s' of func '%s' is not a reg?\n", |
3798 | pp->arg[i].reg, pp->name); |
3799 | regmask |= 1 << reg; |
3800 | } |
3801 | } |
3802 | |
3803 | return regmask; |
3804 | } |
3805 | |
3806 | static int get_pp_arg_regmask_dst(const struct parsed_proto *pp) |
3807 | { |
4d247254 |
3808 | int regmask = 0; |
3809 | int i, reg; |
3810 | |
3811 | if (pp->has_retreg) { |
3812 | for (i = 0; i < pp->argc; i++) { |
3813 | if (pp->arg[i].type.is_retreg) { |
3814 | reg = char_array_i(regs_r32, |
3815 | ARRAY_SIZE(regs_r32), pp->arg[i].reg); |
3816 | ferr_assert(ops, reg >= 0); |
3817 | regmask |= 1 << reg; |
3818 | } |
3819 | } |
3820 | } |
3821 | |
b2bd20c0 |
3822 | if (strstr(pp->ret_type.name, "int64")) |
4d247254 |
3823 | return regmask | (1 << xAX) | (1 << xDX); |
d4a985bd |
3824 | if (IS(pp->ret_type.name, "float") |
3825 | || IS(pp->ret_type.name, "double")) |
3826 | { |
4d247254 |
3827 | return regmask | mxST0; |
d4a985bd |
3828 | } |
b2bd20c0 |
3829 | if (strcasecmp(pp->ret_type.name, "void") == 0) |
4d247254 |
3830 | return regmask; |
b2bd20c0 |
3831 | |
4d247254 |
3832 | return regmask | mxAX; |
b2bd20c0 |
3833 | } |
3834 | |
93b5bd18 |
3835 | static int are_ops_same(struct parsed_op *po1, struct parsed_op *po2) |
3836 | { |
3837 | return po1->op == po2->op && po1->operand_cnt == po2->operand_cnt |
3838 | && memcmp(po1->operand, po2->operand, |
3839 | sizeof(po1->operand[0]) * po1->operand_cnt) == 0; |
3840 | } |
3841 | |
66bdb2b0 |
3842 | static void resolve_branches_parse_calls(int opcnt) |
3843 | { |
d4a985bd |
3844 | static const struct { |
3845 | const char *name; |
3846 | enum op_op op; |
3847 | unsigned int flags; |
3848 | unsigned int regmask_src; |
3849 | unsigned int regmask_dst; |
3850 | } pseudo_ops[] = { |
622eb2ef |
3851 | { "__allshl", OPP_ALLSHL, OPF_DATA, mxAX|mxDX|mxCX, mxAX|mxDX }, |
3852 | { "__allshr", OPP_ALLSHR, OPF_DATA, mxAX|mxDX|mxCX, mxAX|mxDX }, |
3853 | { "__ftol", OPP_FTOL, OPF_FPOP, mxST0, mxAX | mxDX }, |
f9327ad4 |
3854 | // more precise? Wine gets away with just __ftol handler |
3855 | { "__ftol2", OPP_FTOL, OPF_FPOP, mxST0, mxAX | mxDX }, |
8c83cc48 |
3856 | { "__CIpow", OPP_CIPOW, OPF_FPOP, mxST0|mxST1, mxST0 }, |
d4a985bd |
3857 | }; |
66bdb2b0 |
3858 | const struct parsed_proto *pp_c; |
3859 | struct parsed_proto *pp; |
3860 | struct parsed_data *pd; |
3861 | struct parsed_op *po; |
3862 | const char *tmpname; |
56b49358 |
3863 | enum op_op prev_op; |
b2bd20c0 |
3864 | int i, l; |
3865 | int ret; |
66bdb2b0 |
3866 | |
3867 | for (i = 0; i < opcnt; i++) |
3868 | { |
3869 | po = &ops[i]; |
3870 | po->bt_i = -1; |
3871 | po->btj = NULL; |
3872 | |
865f1aca |
3873 | if (po->datap != NULL) { |
3874 | pp = calloc(1, sizeof(*pp)); |
3875 | my_assert_not(pp, NULL); |
3876 | |
3877 | ret = parse_protostr(po->datap, pp); |
3878 | if (ret < 0) |
3879 | ferr(po, "bad protostr supplied: %s\n", (char *)po->datap); |
3880 | free(po->datap); |
3881 | po->datap = NULL; |
3882 | po->pp = pp; |
3883 | } |
3884 | |
66bdb2b0 |
3885 | if (po->op == OP_CALL) { |
3886 | pp = NULL; |
3887 | |
865f1aca |
3888 | if (po->pp != NULL) |
3889 | pp = po->pp; |
3890 | else if (po->operand[0].type == OPT_LABEL) |
3891 | { |
66bdb2b0 |
3892 | tmpname = opr_name(po, 0); |
0a2c6da1 |
3893 | if (IS_START(tmpname, "loc_")) { |
3894 | if (!g_seh_found) |
3895 | ferr(po, "call to loc_*\n"); |
3896 | // eliminate_seh() must take care of it |
3897 | continue; |
3898 | } |
16057ce1 |
3899 | if (IS(tmpname, "__alloca_probe")) |
3900 | continue; |
2eae9f23 |
3901 | if (IS(tmpname, "__SEH_prolog")) { |
3902 | ferr_assert(po, g_seh_found == 0); |
3903 | g_seh_found = 2; |
3904 | continue; |
3905 | } |
3906 | if (IS(tmpname, "__SEH_epilog")) |
3907 | continue; |
d4a985bd |
3908 | |
3909 | // convert some calls to pseudo-ops |
3910 | for (l = 0; l < ARRAY_SIZE(pseudo_ops); l++) { |
3911 | if (!IS(tmpname, pseudo_ops[l].name)) |
3912 | continue; |
3913 | |
3914 | po->op = pseudo_ops[l].op; |
3915 | po->operand_cnt = 0; |
3916 | po->regmask_src = pseudo_ops[l].regmask_src; |
3917 | po->regmask_dst = pseudo_ops[l].regmask_dst; |
3918 | po->flags = pseudo_ops[l].flags; |
3919 | po->flags |= po->regmask_dst ? OPF_DATA : 0; |
3920 | break; |
3921 | } |
3922 | if (l < ARRAY_SIZE(pseudo_ops)) |
3923 | continue; |
3924 | |
66bdb2b0 |
3925 | pp_c = proto_parse(g_fhdr, tmpname, g_header_mode); |
3926 | if (!g_header_mode && pp_c == NULL) |
3927 | ferr(po, "proto_parse failed for call '%s'\n", tmpname); |
3928 | |
3929 | if (pp_c != NULL) { |
3930 | pp = proto_clone(pp_c); |
3931 | my_assert_not(pp, NULL); |
3932 | } |
3933 | } |
66bdb2b0 |
3934 | |
3935 | if (pp != NULL) { |
3936 | if (pp->is_fptr) |
3937 | check_func_pp(po, pp, "fptr var call"); |
56b49358 |
3938 | if (pp->is_noreturn) { |
66bdb2b0 |
3939 | po->flags |= OPF_TAIL; |
56b49358 |
3940 | po->flags &= ~OPF_ATAIL; // most likely... |
3941 | } |
66bdb2b0 |
3942 | } |
3943 | po->pp = pp; |
3944 | continue; |
3945 | } |
3946 | |
3947 | if (!(po->flags & OPF_JMP) || po->op == OP_RET) |
3948 | continue; |
3949 | |
3950 | if (po->operand[0].type == OPT_REGMEM) { |
3951 | pd = try_resolve_jumptab(i, opcnt); |
3952 | if (pd == NULL) |
3953 | goto tailcall; |
3954 | |
3955 | po->btj = pd; |
3956 | continue; |
3957 | } |
3958 | |
3959 | for (l = 0; l < opcnt; l++) { |
3960 | if (g_labels[l] != NULL |
3961 | && IS(po->operand[0].name, g_labels[l])) |
3962 | { |
3963 | if (l == i + 1 && po->op == OP_JMP) { |
9bbecbfb |
3964 | // yet another alignment type... |
3965 | po->flags |= OPF_RMD | OPF_DONE; |
3966 | po->flags &= ~OPF_JMP; |
3967 | po->op = OP_NOP; |
66bdb2b0 |
3968 | break; |
3969 | } |
3970 | add_label_ref(&g_label_refs[l], i); |
3971 | po->bt_i = l; |
3972 | break; |
3973 | } |
3974 | } |
3975 | |
3976 | if (po->bt_i != -1 || (po->flags & OPF_RMD)) |
3977 | continue; |
3978 | |
3979 | if (po->operand[0].type == OPT_LABEL) |
3980 | // assume tail call |
3981 | goto tailcall; |
3982 | |
3983 | ferr(po, "unhandled branch\n"); |
3984 | |
3985 | tailcall: |
3986 | po->op = OP_CALL; |
3987 | po->flags |= OPF_TAIL; |
56b49358 |
3988 | prev_op = i > 0 ? ops[i - 1].op : OP_UD2; |
3989 | if (prev_op == OP_POP) |
66bdb2b0 |
3990 | po->flags |= OPF_ATAIL; |
56b49358 |
3991 | if (g_stack_fsz + g_bp_frame == 0 && prev_op != OP_PUSH |
3992 | && (g_func_pp == NULL || g_func_pp->argc_stack > 0)) |
3993 | { |
3994 | po->flags |= OPF_ATAIL; |
3995 | } |
66bdb2b0 |
3996 | i--; // reprocess |
3997 | } |
9af2d373 |
3998 | } |
3999 | |
ba93cc12 |
4000 | static int resolve_origin(int i, const struct parsed_opr *opr, |
4001 | int magic, int *op_i, int *is_caller); |
0a2c6da1 |
4002 | static void set_label(int i, const char *name); |
ba93cc12 |
4003 | |
2eae9f23 |
4004 | static void eliminate_seh_writes(int opcnt) |
4005 | { |
4006 | const struct parsed_opr *opr; |
4007 | char ofs_reg[16]; |
4008 | int offset; |
4009 | int i; |
4010 | |
4011 | // assume all sf writes above g_seh_size to be seh related |
4012 | // (probably unsafe but oh well) |
4013 | for (i = 0; i < opcnt; i++) { |
4014 | if (ops[i].op != OP_MOV) |
4015 | continue; |
4016 | opr = &ops[i].operand[0]; |
4017 | if (opr->type != OPT_REGMEM) |
4018 | continue; |
4019 | if (!is_stack_access(&ops[i], opr)) |
4020 | continue; |
4021 | |
4022 | offset = 0; |
4023 | parse_stack_access(&ops[i], opr->name, ofs_reg, &offset, |
4024 | NULL, NULL, 0); |
4025 | if (offset < 0 && offset >= -g_seh_size) |
4026 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4027 | } |
4028 | } |
4029 | |
0a2c6da1 |
4030 | static void eliminate_seh_finally(int opcnt) |
4031 | { |
4032 | const char *target_name = NULL; |
4033 | const char *return_name = NULL; |
4034 | int exits[MAX_EXITS]; |
4035 | int exit_count = 0; |
4036 | int call_i = -1; |
4037 | int target_i = -1; |
4038 | int return_i = -1; |
4039 | int tgend_i = -1; |
4040 | int i; |
4041 | |
4042 | for (i = 0; i < opcnt; i++) { |
4043 | if (ops[i].op != OP_CALL) |
4044 | continue; |
4045 | if (!IS_START(opr_name(&ops[i], 0), "loc_")) |
4046 | continue; |
4047 | if (target_name != NULL) |
4048 | ferr(&ops[i], "multiple finally calls? (last was %s)\n", |
4049 | target_name); |
4050 | target_name = opr_name(&ops[i], 0); |
4051 | call_i = i; |
4052 | |
4053 | if (g_labels[i + 1] == NULL) |
4054 | set_label(i + 1, "seh_fin_done"); |
4055 | return_name = g_labels[i + 1]; |
4056 | return_i = i + 1; |
4057 | } |
4058 | |
4059 | if (call_i == -1) |
4060 | // no finally block |
4061 | return; |
4062 | |
4063 | // find finally code (bt_i is not set because it's call) |
4064 | for (i = 0; i < opcnt; i++) { |
4065 | if (g_labels[i] == NULL) |
4066 | continue; |
4067 | if (!IS(g_labels[i], target_name)) |
4068 | continue; |
4069 | |
4070 | ferr_assert(&ops[i], target_i == -1); |
4071 | target_i = i; |
4072 | } |
4073 | ferr_assert(&ops[0], target_i != -1); |
4074 | |
4075 | find_reachable_exits(target_i, opcnt, target_i + opcnt * 24, |
4076 | exits, &exit_count); |
4077 | ferr_assert(&ops[target_i], exit_count == 1); |
4078 | ferr_assert(&ops[target_i], ops[exits[0]].op == OP_RET); |
4079 | tgend_i = exits[0]; |
4080 | |
4081 | // convert to jumps, link |
4082 | ops[call_i].op = OP_JMP; |
4083 | ops[call_i].bt_i = target_i; |
4084 | add_label_ref(&g_label_refs[target_i], call_i); |
4085 | |
4086 | ops[tgend_i].op = OP_JMP; |
4087 | ops[tgend_i].flags &= ~OPF_TAIL; |
4088 | ops[tgend_i].flags |= OPF_JMP; |
4089 | ops[tgend_i].bt_i = return_i; |
4090 | ops[tgend_i].operand_cnt = 1; |
4091 | ops[tgend_i].operand[0].type = OPT_LABEL; |
4092 | snprintf(ops[tgend_i].operand[0].name, NAMELEN, "%s", return_name); |
4093 | add_label_ref(&g_label_refs[return_i], tgend_i); |
4094 | |
4095 | // rm seh finally entry code |
4096 | for (i = target_i - 1; i >= 0; i--) { |
4097 | if (g_labels[i] != NULL && g_label_refs[i].i != -1) |
4098 | return; |
4099 | if (ops[i].flags & OPF_CJMP) |
4100 | return; |
4101 | if (ops[i].flags & (OPF_JMP | OPF_TAIL)) |
4102 | break; |
4103 | } |
4104 | for (i = target_i - 1; i >= 0; i--) { |
4105 | if (ops[i].flags & (OPF_JMP | OPF_TAIL)) |
4106 | break; |
4107 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4108 | } |
4109 | } |
4110 | |
ba93cc12 |
4111 | static void eliminate_seh(int opcnt) |
4112 | { |
4113 | int i, j, k, ret; |
4114 | |
4115 | for (i = 0; i < opcnt; i++) { |
4116 | if (ops[i].op != OP_MOV) |
4117 | continue; |
4118 | if (ops[i].operand[0].segment != SEG_FS) |
4119 | continue; |
4120 | if (!IS(opr_name(&ops[i], 0), "0")) |
4121 | continue; |
4122 | |
4123 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4124 | if (ops[i].operand[1].reg == xSP) { |
4125 | for (j = i - 1; j >= 0; j--) { |
4126 | if (ops[j].op != OP_PUSH) |
4127 | continue; |
4128 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4129 | g_seh_size += 4; |
4130 | if (ops[j].operand[0].val == ~0) |
4131 | break; |
4132 | if (ops[j].operand[0].type == OPT_REG) { |
4133 | k = -1; |
4134 | ret = resolve_origin(j, &ops[j].operand[0], |
4135 | j + opcnt * 22, &k, NULL); |
4136 | if (ret == 1) |
4137 | ops[k].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4138 | } |
4139 | } |
4140 | if (j < 0) |
4141 | ferr(ops, "missing seh terminator\n"); |
4142 | } |
4143 | else { |
4144 | k = -1; |
4145 | ret = resolve_origin(i, &ops[i].operand[1], |
4146 | i + opcnt * 23, &k, NULL); |
4147 | if (ret == 1) |
4148 | ops[k].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4149 | } |
4150 | } |
4151 | |
2eae9f23 |
4152 | eliminate_seh_writes(opcnt); |
0a2c6da1 |
4153 | eliminate_seh_finally(opcnt); |
2eae9f23 |
4154 | } |
ba93cc12 |
4155 | |
2eae9f23 |
4156 | static void eliminate_seh_calls(int opcnt) |
4157 | { |
4158 | int epilog_found = 0; |
4159 | int i; |
4160 | |
4161 | g_bp_frame = 1; |
4162 | g_seh_size = 0x10; |
4163 | |
4164 | i = 0; |
4165 | ferr_assert(&ops[i], ops[i].op == OP_PUSH |
4166 | && ops[i].operand[0].type == OPT_CONST); |
4167 | g_stack_fsz = g_seh_size + ops[i].operand[0].val; |
4168 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4169 | |
4170 | i++; |
4171 | ferr_assert(&ops[i], ops[i].op == OP_PUSH |
4172 | && ops[i].operand[0].type == OPT_OFFSET); |
4173 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4174 | |
4175 | i++; |
4176 | ferr_assert(&ops[i], ops[i].op == OP_CALL |
4177 | && IS(opr_name(&ops[i], 0), "__SEH_prolog")); |
4178 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4179 | |
4180 | for (i++; i < opcnt; i++) { |
4181 | if (ops[i].op != OP_CALL) |
ba93cc12 |
4182 | continue; |
2eae9f23 |
4183 | if (!IS(opr_name(&ops[i], 0), "__SEH_epilog")) |
ba93cc12 |
4184 | continue; |
4185 | |
2eae9f23 |
4186 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4187 | epilog_found = 1; |
4188 | } |
4189 | ferr_assert(ops, epilog_found); |
4190 | |
4191 | eliminate_seh_writes(opcnt); |
0a2c6da1 |
4192 | eliminate_seh_finally(opcnt); |
2eae9f23 |
4193 | } |
4194 | |
f9d7b461 |
4195 | // check for prologue of many pushes and epilogue with pops |
4196 | static void check_simple_sequence(int opcnt, int *fsz) |
4197 | { |
4198 | int found = 0; |
4199 | int seq_len; |
4200 | int seq_p; |
4201 | int seq[4]; |
4202 | int reg; |
4203 | int i, j; |
4204 | |
4205 | for (i = 0; i < opcnt && i < ARRAY_SIZE(seq); i++) { |
4206 | if (ops[i].op != OP_PUSH || ops[i].operand[0].type != OPT_REG) |
4207 | break; |
4208 | reg = ops[i].operand[0].reg; |
4209 | if (reg != xBX && reg != xSI && reg != xDI && reg != xBP) |
4210 | break; |
4211 | for (j = 0; j < i; j++) |
4212 | if (seq[j] == reg) |
4213 | break; |
4214 | if (j != i) |
4215 | // probably something else is going on here |
4216 | break; |
4217 | seq[i] = reg; |
4218 | } |
4219 | seq_len = i; |
4220 | if (seq_len == 0) |
4221 | return; |
4222 | |
4223 | for (; i < opcnt && seq_len > 0; i++) { |
4224 | if (!(ops[i].flags & OPF_TAIL)) |
4225 | continue; |
4226 | |
4227 | for (j = i - 1, seq_p = 0; j >= 0 && seq_p < seq_len; j--) { |
4228 | if (ops[j].op != OP_POP || ops[j].operand[0].type != OPT_REG) |
4229 | break; |
4230 | if (ops[j].operand[0].reg != seq[seq_p]) |
4231 | break; |
4232 | seq_p++; |
4233 | } |
4234 | found = seq_len = seq_p; |
4235 | } |
4236 | if (!found) |
4237 | return; |
4238 | |
4239 | for (i = 0; i < seq_len; i++) |
4240 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4241 | |
4242 | for (; i < opcnt && seq_len > 0; i++) { |
4243 | if (!(ops[i].flags & OPF_TAIL)) |
4244 | continue; |
4245 | |
4246 | for (j = i - 1, seq_p = 0; j >= 0 && seq_p < seq_len; j--) { |
4247 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4248 | seq_p++; |
4249 | } |
4250 | } |
4251 | |
4252 | // unlike pushes after sub esp, |
57b1b785 |
4253 | // IDA treats pushes like this as part of var area |
f9d7b461 |
4254 | *fsz += seq_len * 4; |
4255 | } |
4256 | |
2eae9f23 |
4257 | static int scan_prologue(int i, int opcnt, int *ecx_push, int *esp_sub) |
4258 | { |
f9d7b461 |
4259 | const char *name; |
4260 | int j, len, ret; |
2eae9f23 |
4261 | |
4262 | for (; i < opcnt; i++) |
4263 | if (!(ops[i].flags & OPF_DONE)) |
4264 | break; |
4265 | |
4266 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
4267 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4268 | g_stack_fsz += 4; |
4269 | (*ecx_push)++; |
4270 | i++; |
4271 | } |
4272 | |
4273 | for (; i < opcnt; i++) { |
4274 | if (i > 0 && g_labels[i] != NULL) |
4275 | break; |
57b1b785 |
4276 | if (ops[i].flags & (OPF_JMP|OPF_TAIL)) |
4277 | break; |
4278 | if (ops[i].flags & OPF_DONE) |
4279 | continue; |
4280 | if (ops[i].op == OP_PUSH) |
2eae9f23 |
4281 | break; |
4282 | if (ops[i].op == OP_SUB && ops[i].operand[0].reg == xSP |
4283 | && ops[i].operand[1].type == OPT_CONST) |
4284 | { |
4285 | g_stack_fsz += opr_const(&ops[i], 1); |
ba93cc12 |
4286 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
2eae9f23 |
4287 | i++; |
4288 | *esp_sub = 1; |
4289 | break; |
4290 | } |
f9d7b461 |
4291 | if (ops[i].op == OP_LEA && ops[i].operand[0].reg == xSP |
4292 | && ops[i].operand[1].type == OPT_REGMEM |
4293 | && IS_START(ops[i].operand[1].name, "esp-")) |
4294 | { |
4295 | name = ops[i].operand[1].name; |
4296 | ret = sscanf(name, "esp-%x%n", &j, &len); |
4297 | ferr_assert(&ops[i], ret == 1 && len == strlen(name)); |
4298 | g_stack_fsz += j; |
4299 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4300 | i++; |
4301 | *esp_sub = 1; |
4302 | break; |
4303 | } |
2eae9f23 |
4304 | if (ops[i].op == OP_MOV && ops[i].operand[0].reg == xAX |
4305 | && ops[i].operand[1].type == OPT_CONST) |
4306 | { |
4307 | for (j = i + 1; j < opcnt; j++) |
4308 | if (!(ops[j].flags & OPF_DONE)) |
4309 | break; |
4310 | if (ops[j].op == OP_CALL |
4311 | && IS(opr_name(&ops[j], 0), "__alloca_probe")) |
4312 | { |
4313 | g_stack_fsz += opr_const(&ops[i], 1); |
4314 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4315 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4316 | i = j + 1; |
4317 | *esp_sub = 1; |
57b1b785 |
4318 | break; |
2eae9f23 |
4319 | } |
2eae9f23 |
4320 | } |
ba93cc12 |
4321 | } |
2eae9f23 |
4322 | |
4323 | return i; |
ba93cc12 |
4324 | } |
4325 | |
f9327ad4 |
4326 | static void scan_prologue_epilogue(int opcnt, int *stack_align) |
9af2d373 |
4327 | { |
16057ce1 |
4328 | int ecx_push = 0, esp_sub = 0, pusha = 0; |
4329 | int sandard_epilogue; |
f9d7b461 |
4330 | int found, ret, len; |
4331 | int push_fsz = 0; |
9af2d373 |
4332 | int i, j, l; |
4333 | |
2eae9f23 |
4334 | if (g_seh_found == 2) { |
4335 | eliminate_seh_calls(opcnt); |
4336 | return; |
4337 | } |
ba93cc12 |
4338 | if (g_seh_found) { |
4339 | eliminate_seh(opcnt); |
4340 | // ida treats seh as part of sf |
4341 | g_stack_fsz = g_seh_size; |
4342 | esp_sub = 1; |
4343 | } |
4344 | |
9af2d373 |
4345 | if (ops[0].op == OP_PUSH && IS(opr_name(&ops[0], 0), "ebp") |
4346 | && ops[1].op == OP_MOV |
4347 | && IS(opr_name(&ops[1], 0), "ebp") |
4348 | && IS(opr_name(&ops[1], 1), "esp")) |
4349 | { |
4350 | g_bp_frame = 1; |
b2bd20c0 |
4351 | ops[0].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4352 | ops[1].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
ba93cc12 |
4353 | |
4354 | for (i = 2; i < opcnt; i++) |
4355 | if (!(ops[i].flags & OPF_DONE)) |
4356 | break; |
9af2d373 |
4357 | |
16057ce1 |
4358 | if (ops[i].op == OP_PUSHA) { |
4359 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4360 | pusha = 1; |
4361 | i++; |
4362 | } |
4363 | |
f9327ad4 |
4364 | if (ops[i].op == OP_AND && ops[i].operand[0].reg == xSP |
4365 | && ops[i].operand[1].type == OPT_CONST) |
4366 | { |
4367 | l = ops[i].operand[1].val; |
4368 | j = ffs(l) - 1; |
4369 | if (j == -1 || (l >> j) != -1) |
4370 | ferr(&ops[i], "unhandled esp align: %x\n", l); |
4371 | if (stack_align != NULL) |
4372 | *stack_align = 1 << j; |
4373 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4374 | i++; |
4375 | } |
4376 | |
2eae9f23 |
4377 | i = scan_prologue(i, opcnt, &ecx_push, &esp_sub); |
9af2d373 |
4378 | |
4379 | found = 0; |
4380 | do { |
4381 | for (; i < opcnt; i++) |
66bdb2b0 |
4382 | if (ops[i].flags & OPF_TAIL) |
9af2d373 |
4383 | break; |
4384 | j = i - 1; |
4385 | if (i == opcnt && (ops[j].flags & OPF_JMP)) { |
66bdb2b0 |
4386 | if (ops[j].bt_i != -1 || ops[j].btj != NULL) |
4387 | break; |
4388 | i--; |
9af2d373 |
4389 | j--; |
4390 | } |
4391 | |
16057ce1 |
4392 | sandard_epilogue = 0; |
4393 | if (ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ebp")) |
4394 | { |
4395 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4396 | // the standard epilogue is sometimes even used without a sf |
4397 | if (ops[j - 1].op == OP_MOV |
4398 | && IS(opr_name(&ops[j - 1], 0), "esp") |
4399 | && IS(opr_name(&ops[j - 1], 1), "ebp")) |
4400 | sandard_epilogue = 1; |
4401 | } |
4402 | else if (ops[j].op == OP_LEAVE) |
9af2d373 |
4403 | { |
b2bd20c0 |
4404 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
16057ce1 |
4405 | sandard_epilogue = 1; |
9af2d373 |
4406 | } |
66bdb2b0 |
4407 | else if (ops[i].op == OP_CALL && ops[i].pp != NULL |
4408 | && ops[i].pp->is_noreturn) |
4409 | { |
4410 | // on noreturn, msvc sometimes cleans stack, sometimes not |
4411 | i++; |
4412 | found = 1; |
4413 | continue; |
4414 | } |
9af2d373 |
4415 | else if (!(g_ida_func_attr & IDAFA_NORETURN)) |
4416 | ferr(&ops[j], "'pop ebp' expected\n"); |
4417 | |
16057ce1 |
4418 | if (g_stack_fsz != 0 || sandard_epilogue) { |
bfacdc83 |
4419 | if (ops[j].op == OP_LEAVE) |
4420 | j--; |
16057ce1 |
4421 | else if (sandard_epilogue) // mov esp, ebp |
9af2d373 |
4422 | { |
b2bd20c0 |
4423 | ops[j - 1].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
bfacdc83 |
4424 | j -= 2; |
9af2d373 |
4425 | } |
bfacdc83 |
4426 | else if (!(g_ida_func_attr & IDAFA_NORETURN)) |
9af2d373 |
4427 | { |
bfacdc83 |
4428 | ferr(&ops[j], "esp restore expected\n"); |
9af2d373 |
4429 | } |
4430 | |
bfacdc83 |
4431 | if (ecx_push && j >= 0 && ops[j].op == OP_POP |
4432 | && IS(opr_name(&ops[j], 0), "ecx")) |
9af2d373 |
4433 | { |
bfacdc83 |
4434 | ferr(&ops[j], "unexpected ecx pop\n"); |
9af2d373 |
4435 | } |
4436 | } |
4437 | |
16057ce1 |
4438 | if (pusha) { |
4439 | if (ops[j].op == OP_POPA) |
4440 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4441 | else |
4442 | ferr(&ops[j], "popa expected\n"); |
4443 | } |
4444 | |
9af2d373 |
4445 | found = 1; |
4446 | i++; |
4447 | } while (i < opcnt); |
4448 | |
66bdb2b0 |
4449 | if (!found) |
4450 | ferr(ops, "missing ebp epilogue\n"); |
9af2d373 |
4451 | return; |
4452 | } |
4453 | |
4454 | // non-bp frame |
f9d7b461 |
4455 | check_simple_sequence(opcnt, &push_fsz); |
2eae9f23 |
4456 | i = scan_prologue(0, opcnt, &ecx_push, &esp_sub); |
9af2d373 |
4457 | |
4458 | if (ecx_push && !esp_sub) { |
4459 | // could actually be args for a call.. |
4460 | for (; i < opcnt; i++) |
4461 | if (ops[i].op != OP_PUSH) |
4462 | break; |
4463 | |
4464 | if (ops[i].op == OP_CALL && ops[i].operand[0].type == OPT_LABEL) { |
4465 | const struct parsed_proto *pp; |
4466 | pp = proto_parse(g_fhdr, opr_name(&ops[i], 0), 1); |
4467 | j = pp ? pp->argc_stack : 0; |
4468 | while (i > 0 && j > 0) { |
4469 | i--; |
4470 | if (ops[i].op == OP_PUSH) { |
b2bd20c0 |
4471 | ops[i].flags &= ~(OPF_RMD | OPF_DONE | OPF_NOREGS); |
9af2d373 |
4472 | j--; |
4473 | } |
4474 | } |
4475 | if (j != 0) |
4476 | ferr(&ops[i], "unhandled prologue\n"); |
4477 | |
4478 | // recheck |
ba93cc12 |
4479 | i = ecx_push = 0; |
4480 | g_stack_fsz = g_seh_size; |
9af2d373 |
4481 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
4482 | if (!(ops[i].flags & OPF_RMD)) |
4483 | break; |
4484 | g_stack_fsz += 4; |
4485 | ecx_push++; |
4486 | i++; |
4487 | } |
4488 | } |
4489 | } |
4490 | |
4491 | found = 0; |
4492 | if (ecx_push || esp_sub) |
4493 | { |
4494 | g_sp_frame = 1; |
4495 | |
9af2d373 |
4496 | do { |
4497 | for (; i < opcnt; i++) |
66bdb2b0 |
4498 | if (ops[i].flags & OPF_TAIL) |
9af2d373 |
4499 | break; |
fe18df39 |
4500 | |
9af2d373 |
4501 | j = i - 1; |
4502 | if (i == opcnt && (ops[j].flags & OPF_JMP)) { |
66bdb2b0 |
4503 | if (ops[j].bt_i != -1 || ops[j].btj != NULL) |
4504 | break; |
4505 | i--; |
9af2d373 |
4506 | j--; |
4507 | } |
2eae9f23 |
4508 | else if (i < opcnt && (ops[i].flags & OPF_ATAIL)) { |
4509 | // skip arg updates for arg-reuse tailcall |
4510 | for (; j >= 0; j--) { |
4511 | if (ops[j].op != OP_MOV) |
4512 | break; |
57b1b785 |
4513 | if (ops[j].operand[0].type == OPT_REGMEM |
4514 | && strstr(ops[j].operand[0].name, "arg_") != NULL) |
4515 | continue; |
4516 | if (ops[j].operand[0].type == OPT_REG) |
4517 | continue; // assume arg-reg mov |
4518 | break; |
2eae9f23 |
4519 | } |
4520 | } |
9af2d373 |
4521 | |
f9d7b461 |
4522 | for (; j >= 0; j--) { |
4523 | if ((ops[j].flags & (OPF_RMD | OPF_DONE | OPF_NOREGS)) != |
4524 | (OPF_RMD | OPF_DONE | OPF_NOREGS)) |
4525 | break; |
4526 | } |
4527 | |
ba93cc12 |
4528 | if (ecx_push > 0 && !esp_sub) { |
2eae9f23 |
4529 | for (l = 0; l < ecx_push && j >= 0; l++) { |
9af2d373 |
4530 | if (ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ecx")) |
4531 | /* pop ecx */; |
4532 | else if (ops[j].op == OP_ADD |
4533 | && IS(opr_name(&ops[j], 0), "esp") |
4534 | && ops[j].operand[1].type == OPT_CONST) |
4535 | { |
4536 | /* add esp, N */ |
5e49b270 |
4537 | l += ops[j].operand[1].val / 4 - 1; |
9af2d373 |
4538 | } |
4539 | else |
56b49358 |
4540 | break; |
9af2d373 |
4541 | |
b2bd20c0 |
4542 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
9af2d373 |
4543 | j--; |
4544 | } |
56b49358 |
4545 | if (l != ecx_push) { |
4546 | if (i < opcnt && ops[i].op == OP_CALL |
4547 | && ops[i].pp != NULL && ops[i].pp->is_noreturn) |
4548 | { |
4549 | // noreturn tailcall with no epilogue |
4550 | i++; |
4551 | found = 1; |
4552 | continue; |
4553 | } |
9af2d373 |
4554 | ferr(&ops[j], "epilogue scan failed\n"); |
56b49358 |
4555 | } |
9af2d373 |
4556 | |
4557 | found = 1; |
4558 | } |
4559 | |
4560 | if (esp_sub) { |
f9d7b461 |
4561 | if (ops[j].op == OP_ADD |
4562 | && IS(opr_name(&ops[j], 0), "esp") |
4563 | && ops[j].operand[1].type == OPT_CONST) |
622eb2ef |
4564 | { |
f9d7b461 |
4565 | if (ops[j].operand[1].val < g_stack_fsz) |
4566 | ferr(&ops[j], "esp adj is too low (need %d)\n", g_stack_fsz); |
71d50aa7 |
4567 | |
f9d7b461 |
4568 | ops[j].operand[1].val -= g_stack_fsz; // for stack arg scanner |
4569 | if (ops[j].operand[1].val == 0) |
4570 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
4571 | found = 1; |
4572 | } |
4573 | else if (ops[j].op == OP_LEA && ops[j].operand[0].reg == xSP |
4574 | && ops[j].operand[1].type == OPT_REGMEM |
4575 | && IS_START(ops[j].operand[1].name, "esp+")) |
4576 | { |
4577 | const char *name = ops[j].operand[1].name; |
4578 | ret = sscanf(name, "esp+%x%n", &l, &len); |
4579 | ferr_assert(&ops[j], ret == 1 && len == strlen(name)); |
4580 | ferr_assert(&ops[j], l <= g_stack_fsz); |
71d50aa7 |
4581 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
f9d7b461 |
4582 | found = 1; |
4583 | } |
4584 | else if (i < opcnt && ops[i].op == OP_CALL |
4585 | && ops[i].pp != NULL && ops[i].pp->is_noreturn) |
4586 | { |
4587 | // noreturn tailcall with no epilogue |
4588 | found = 1; |
4589 | } |
4590 | else |
4591 | ferr(&ops[j], "'add esp' expected\n"); |
9af2d373 |
4592 | } |
4593 | |
4594 | i++; |
4595 | } while (i < opcnt); |
66bdb2b0 |
4596 | |
4597 | if (!found) |
4598 | ferr(ops, "missing esp epilogue\n"); |
9af2d373 |
4599 | } |
f9d7b461 |
4600 | |
4601 | if (g_stack_fsz != 0) |
4602 | // see check_simple_sequence |
4603 | g_stack_fsz += push_fsz; |
9af2d373 |
4604 | } |
4605 | |
23fd0b11 |
4606 | // find an instruction that changed opr before i op |
db63af51 |
4607 | // *op_i must be set to -1 by the caller |
865f1aca |
4608 | // *is_caller is set to 1 if one source is determined to be g_func arg |
92d715b6 |
4609 | // returns 1 if found, *op_i is then set to origin |
865f1aca |
4610 | // returns -1 if multiple origins are found |
23fd0b11 |
4611 | static int resolve_origin(int i, const struct parsed_opr *opr, |
92d715b6 |
4612 | int magic, int *op_i, int *is_caller) |
1f84f6b3 |
4613 | { |
4614 | struct label_ref *lr; |
4615 | int ret = 0; |
4616 | |
1f84f6b3 |
4617 | while (1) { |
d7857c3a |
4618 | if (g_labels[i] != NULL) { |
1f84f6b3 |
4619 | lr = &g_label_refs[i]; |
92d715b6 |
4620 | for (; lr != NULL; lr = lr->next) { |
4621 | check_i(&ops[i], lr->i); |
4622 | ret |= resolve_origin(lr->i, opr, magic, op_i, is_caller); |
4623 | } |
1f84f6b3 |
4624 | if (i > 0 && LAST_OP(i - 1)) |
4625 | return ret; |
4626 | } |
4627 | |
4628 | i--; |
92d715b6 |
4629 | if (i < 0) { |
4630 | if (is_caller != NULL) |
4631 | *is_caller = 1; |
1f84f6b3 |
4632 | return -1; |
92d715b6 |
4633 | } |
1f84f6b3 |
4634 | |
4635 | if (ops[i].cc_scratch == magic) |
ebc4dc43 |
4636 | return ret; |
1f84f6b3 |
4637 | ops[i].cc_scratch = magic; |
4638 | |
4639 | if (!(ops[i].flags & OPF_DATA)) |
4640 | continue; |
4641 | if (!is_opr_modified(opr, &ops[i])) |
4642 | continue; |
23fd0b11 |
4643 | |
4644 | if (*op_i >= 0) { |
93b5bd18 |
4645 | if (*op_i == i || are_ops_same(&ops[*op_i], &ops[i])) |
ebc4dc43 |
4646 | return ret | 1; |
4647 | |
23fd0b11 |
4648 | return -1; |
4649 | } |
4650 | |
4651 | *op_i = i; |
ebc4dc43 |
4652 | return ret | 1; |
23fd0b11 |
4653 | } |
4654 | } |
4655 | |
db63af51 |
4656 | // find an instruction that previously referenced opr |
4657 | // if multiple results are found - fail |
4658 | // *op_i must be set to -1 by the caller |
4659 | // returns 1 if found, *op_i is then set to referencer insn |
4660 | static int resolve_last_ref(int i, const struct parsed_opr *opr, |
4661 | int magic, int *op_i) |
4662 | { |
4663 | struct label_ref *lr; |
4664 | int ret = 0; |
4665 | |
db63af51 |
4666 | while (1) { |
4667 | if (g_labels[i] != NULL) { |
4668 | lr = &g_label_refs[i]; |
4669 | for (; lr != NULL; lr = lr->next) { |
4670 | check_i(&ops[i], lr->i); |
4671 | ret |= resolve_last_ref(lr->i, opr, magic, op_i); |
4672 | } |
4673 | if (i > 0 && LAST_OP(i - 1)) |
4674 | return ret; |
4675 | } |
4676 | |
4677 | i--; |
4678 | if (i < 0) |
4679 | return -1; |
4680 | |
4681 | if (ops[i].cc_scratch == magic) |
4682 | return 0; |
4683 | ops[i].cc_scratch = magic; |
4684 | |
4685 | if (!is_opr_referenced(opr, &ops[i])) |
4686 | continue; |
4687 | |
4688 | if (*op_i >= 0) |
4689 | return -1; |
4690 | |
4691 | *op_i = i; |
4692 | return 1; |
4693 | } |
4694 | } |
4695 | |
16057ce1 |
4696 | // adjust datap of all reachable 'op' insns when moving back |
4697 | // returns 1 if at least 1 op was found |
4698 | // returns -1 if path without an op was found |
4699 | static int adjust_prev_op(int i, enum op_op op, int magic, void *datap) |
4700 | { |
4701 | struct label_ref *lr; |
4702 | int ret = 0; |
4703 | |
4704 | if (ops[i].cc_scratch == magic) |
4705 | return 0; |
4706 | ops[i].cc_scratch = magic; |
4707 | |
4708 | while (1) { |
4709 | if (g_labels[i] != NULL) { |
4710 | lr = &g_label_refs[i]; |
4711 | for (; lr != NULL; lr = lr->next) { |
4712 | check_i(&ops[i], lr->i); |
4713 | ret |= adjust_prev_op(lr->i, op, magic, datap); |
4714 | } |
4715 | if (i > 0 && LAST_OP(i - 1)) |
4716 | return ret; |
4717 | } |
4718 | |
4719 | i--; |
4720 | if (i < 0) |
4721 | return -1; |
4722 | |
4723 | if (ops[i].cc_scratch == magic) |
4724 | return 0; |
4725 | ops[i].cc_scratch = magic; |
4726 | |
4727 | if (ops[i].op != op) |
4728 | continue; |
4729 | |
4730 | ops[i].datap = datap; |
4731 | return 1; |
4732 | } |
4733 | } |
4734 | |
db63af51 |
4735 | // find next instruction that reads opr |
db63af51 |
4736 | // *op_i must be set to -1 by the caller |
b2bd20c0 |
4737 | // on return, *op_i is set to first referencer insn |
4738 | // returns 1 if exactly 1 referencer is found |
db63af51 |
4739 | static int find_next_read(int i, int opcnt, |
4740 | const struct parsed_opr *opr, int magic, int *op_i) |
4741 | { |
4742 | struct parsed_op *po; |
4743 | int j, ret = 0; |
4744 | |
4745 | for (; i < opcnt; i++) |
4746 | { |
4747 | if (ops[i].cc_scratch == magic) |
b2bd20c0 |
4748 | return ret; |
db63af51 |
4749 | ops[i].cc_scratch = magic; |
4750 | |
4751 | po = &ops[i]; |
4752 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
4753 | if (po->btj != NULL) { |
4754 | // jumptable |
4755 | for (j = 0; j < po->btj->count; j++) { |
4756 | check_i(po, po->btj->d[j].bt_i); |
4757 | ret |= find_next_read(po->btj->d[j].bt_i, opcnt, opr, |
4758 | magic, op_i); |
4759 | } |
4760 | return ret; |
4761 | } |
4762 | |
4763 | if (po->flags & OPF_RMD) |
4764 | continue; |
4765 | check_i(po, po->bt_i); |
4766 | if (po->flags & OPF_CJMP) { |
b2bd20c0 |
4767 | ret |= find_next_read(po->bt_i, opcnt, opr, magic, op_i); |
db63af51 |
4768 | if (ret < 0) |
4769 | return ret; |
4770 | } |
b2bd20c0 |
4771 | else |
4772 | i = po->bt_i - 1; |
db63af51 |
4773 | continue; |
4774 | } |
4775 | |
4776 | if (!is_opr_read(opr, po)) { |
16057ce1 |
4777 | int full_opr = 1; |
4778 | if (opr->type == OPT_REG && po->operand[0].type == OPT_REG |
4779 | && opr->reg == po->operand[0].reg && (po->flags & OPF_DATA)) |
acd03176 |
4780 | { |
16057ce1 |
4781 | full_opr = po->operand[0].lmod >= opr->lmod; |
4782 | } |
4783 | if (is_opr_modified(opr, po) && full_opr) { |
db63af51 |
4784 | // it's overwritten |
b2bd20c0 |
4785 | return ret; |
acd03176 |
4786 | } |
db63af51 |
4787 | if (po->flags & OPF_TAIL) |
b2bd20c0 |
4788 | return ret; |
db63af51 |
4789 | continue; |
4790 | } |
4791 | |
4792 | if (*op_i >= 0) |
4793 | return -1; |
4794 | |
4795 | *op_i = i; |
4796 | return 1; |
4797 | } |
4798 | |
4799 | return 0; |
4800 | } |
4801 | |
427da1c9 |
4802 | static int find_next_read_reg(int i, int opcnt, int reg, |
4803 | enum opr_lenmod lmod, int magic, int *op_i) |
4804 | { |
4805 | struct parsed_opr opr = OPR_INIT(OPT_REG, lmod, reg); |
4806 | |
4807 | *op_i = -1; |
4808 | return find_next_read(i, opcnt, &opr, magic, op_i); |
4809 | } |
4810 | |
16057ce1 |
4811 | // find next instruction that reads opr |
4812 | // *op_i must be set to -1 by the caller |
4813 | // on return, *op_i is set to first flag user insn |
4814 | // returns 1 if exactly 1 flag user is found |
4815 | static int find_next_flag_use(int i, int opcnt, int magic, int *op_i) |
4816 | { |
4817 | struct parsed_op *po; |
4818 | int j, ret = 0; |
4819 | |
4820 | for (; i < opcnt; i++) |
4821 | { |
4822 | if (ops[i].cc_scratch == magic) |
4823 | return ret; |
4824 | ops[i].cc_scratch = magic; |
4825 | |
4826 | po = &ops[i]; |
4827 | if (po->op == OP_CALL) |
4828 | return -1; |
4829 | if (po->flags & OPF_JMP) { |
4830 | if (po->btj != NULL) { |
4831 | // jumptable |
4832 | for (j = 0; j < po->btj->count; j++) { |
4833 | check_i(po, po->btj->d[j].bt_i); |
4834 | ret |= find_next_flag_use(po->btj->d[j].bt_i, opcnt, |
4835 | magic, op_i); |
4836 | } |
4837 | return ret; |
4838 | } |
4839 | |
4840 | if (po->flags & OPF_RMD) |
4841 | continue; |
4842 | check_i(po, po->bt_i); |
4843 | if (po->flags & OPF_CJMP) |
4844 | goto found; |
4845 | else |
4846 | i = po->bt_i - 1; |
4847 | continue; |
4848 | } |
4849 | |
4850 | if (!(po->flags & OPF_CC)) { |
4851 | if (po->flags & OPF_FLAGS) |
4852 | // flags changed |
4853 | return ret; |
4854 | if (po->flags & OPF_TAIL) |
4855 | return ret; |
4856 | continue; |
4857 | } |
4858 | |
4859 | found: |
4860 | if (*op_i >= 0) |
4861 | return -1; |
4862 | |
4863 | *op_i = i; |
4864 | return 1; |
4865 | } |
4866 | |
4867 | return 0; |
4868 | } |
4869 | |
23fd0b11 |
4870 | static int try_resolve_const(int i, const struct parsed_opr *opr, |
4871 | int magic, unsigned int *val) |
4872 | { |
4873 | int s_i = -1; |
92d715b6 |
4874 | int ret; |
23fd0b11 |
4875 | |
92d715b6 |
4876 | ret = resolve_origin(i, opr, magic, &s_i, NULL); |
23fd0b11 |
4877 | if (ret == 1) { |
4878 | i = s_i; |
1f84f6b3 |
4879 | if (ops[i].op != OP_MOV && ops[i].operand[1].type != OPT_CONST) |
4880 | return -1; |
4881 | |
4882 | *val = ops[i].operand[1].val; |
4883 | return 1; |
4884 | } |
23fd0b11 |
4885 | |
4886 | return -1; |
1f84f6b3 |
4887 | } |
4888 | |
16057ce1 |
4889 | static int resolve_used_bits(int i, int opcnt, int reg, |
4890 | int *mask, int *is_z_check) |
4891 | { |
4892 | struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_WORD, reg); |
4893 | int j = -1, k = -1; |
4894 | int ret; |
4895 | |
4896 | ret = find_next_read(i, opcnt, &opr, i + opcnt * 20, &j); |
4897 | if (ret != 1) |
4898 | return -1; |
4899 | |
4900 | find_next_read(j + 1, opcnt, &opr, i + opcnt * 20 + 1, &k); |
4901 | if (k != -1) { |
4902 | fnote(&ops[j], "(first read)\n"); |
4903 | ferr(&ops[k], "TODO: bit resolve: multiple readers\n"); |
4904 | } |
4905 | |
4906 | if (ops[j].op != OP_TEST || ops[j].operand[1].type != OPT_CONST) |
4907 | ferr(&ops[j], "TODO: bit resolve: not a const test\n"); |
4908 | |
4909 | ferr_assert(&ops[j], ops[j].operand[0].type == OPT_REG); |
4910 | ferr_assert(&ops[j], ops[j].operand[0].reg == reg); |
4911 | |
4912 | *mask = ops[j].operand[1].val; |
4913 | if (ops[j].operand[0].lmod == OPLM_BYTE |
4914 | && ops[j].operand[0].name[1] == 'h') |
4915 | { |
4916 | *mask <<= 8; |
4917 | } |
4918 | ferr_assert(&ops[j], (*mask & ~0xffff) == 0); |
4919 | |
4920 | *is_z_check = 0; |
4921 | ret = find_next_flag_use(j + 1, opcnt, i + opcnt * 20 + 2, &k); |
4922 | if (ret == 1) |
4923 | *is_z_check = ops[k].pfo == PFO_Z; |
4924 | |
4925 | return 0; |
4926 | } |
4927 | |
93b5bd18 |
4928 | static const struct parsed_proto *resolve_deref(int i, int magic, |
4929 | struct parsed_opr *opr, int level) |
4930 | { |
4931 | struct parsed_opr opr_s = OPR_INIT(OPT_REG, OPLM_DWORD, 0); |
4932 | const struct parsed_proto *pp = NULL; |
4933 | int from_caller = 0; |
4934 | char s_reg[4]; |
4935 | int offset = 0; |
4936 | int len = 0; |
4937 | int j = -1; |
4938 | int k = -1; |
4939 | int reg; |
4940 | int ret; |
4941 | |
4942 | ret = sscanf(opr->name, "%3s+%x%n", s_reg, &offset, &len); |
4943 | if (ret != 2 || len != strlen(opr->name)) { |
4944 | ret = sscanf(opr->name, "%3s%n", s_reg, &len); |
4945 | if (ret != 1 || len != strlen(opr->name)) |
4946 | return NULL; |
4947 | } |
4948 | |
4949 | reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s_reg); |
4950 | if (reg < 0) |
4951 | return NULL; |
4952 | |
4953 | opr_s.reg = reg; |
4954 | ret = resolve_origin(i, &opr_s, i + magic, &j, NULL); |
4955 | if (ret != 1) |
4956 | return NULL; |
4957 | |
4958 | if (ops[j].op == OP_MOV && ops[j].operand[1].type == OPT_REGMEM |
4959 | && strlen(ops[j].operand[1].name) == 3 |
4960 | && ops[j].operand[0].lmod == OPLM_DWORD |
4961 | && ops[j].pp == NULL // no hint |
4962 | && level == 0) |
4963 | { |
4964 | // allow one simple dereference (com/directx) |
4965 | reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), |
4966 | ops[j].operand[1].name); |
4967 | if (reg < 0) |
4968 | return NULL; |
4969 | opr_s.reg = reg; |
4970 | ret = resolve_origin(j, &opr_s, j + magic, &k, NULL); |
4971 | if (ret != 1) |
4972 | return NULL; |
4973 | j = k; |
4974 | } |
4975 | if (ops[j].op != OP_MOV || ops[j].operand[0].lmod != OPLM_DWORD) |
4976 | return NULL; |
4977 | |
4978 | if (ops[j].pp != NULL) { |
4979 | // type hint in asm |
4980 | pp = ops[j].pp; |
4981 | } |
4982 | else if (ops[j].operand[1].type == OPT_REGMEM) { |
4983 | pp = try_recover_pp(&ops[j], &ops[j].operand[1], 0, NULL); |
4984 | if (pp == NULL) { |
4985 | // maybe structure ptr in structure |
4986 | pp = resolve_deref(j, magic, &ops[j].operand[1], level + 1); |
4987 | } |
4988 | } |
4989 | else if (ops[j].operand[1].type == OPT_LABEL) |
4990 | pp = proto_parse(g_fhdr, ops[j].operand[1].name, g_quiet_pp); |
4991 | else if (ops[j].operand[1].type == OPT_REG) { |
4992 | // maybe arg reg? |
4993 | k = -1; |
4994 | ret = resolve_origin(j, &ops[j].operand[1], i + magic, |
4995 | &k, &from_caller); |
4996 | if (ret != 1 && from_caller && k == -1 && g_func_pp != NULL) { |
4997 | for (k = 0; k < g_func_pp->argc; k++) { |
4998 | if (g_func_pp->arg[k].reg == NULL) |
4999 | continue; |
5000 | if (IS(g_func_pp->arg[k].reg, ops[j].operand[1].name)) { |
5001 | pp = g_func_pp->arg[k].pp; |
5002 | break; |
5003 | } |
5004 | } |
5005 | } |
5006 | } |
5007 | |
5008 | if (pp == NULL) |
5009 | return NULL; |
5010 | if (pp->is_func || pp->is_fptr || !pp->type.is_struct) { |
5011 | if (offset != 0) |
5012 | ferr(&ops[j], "expected struct, got '%s %s'\n", |
5013 | pp->type.name, pp->name); |
5014 | return NULL; |
5015 | } |
5016 | |
5017 | return proto_lookup_struct(g_fhdr, pp->type.name, offset); |
5018 | } |
5019 | |
865f1aca |
5020 | static const struct parsed_proto *resolve_icall(int i, int opcnt, |
5021 | int *pp_i, int *multi_src) |
5022 | { |
5023 | const struct parsed_proto *pp = NULL; |
5024 | int search_advice = 0; |
865f1aca |
5025 | |
5026 | *multi_src = 0; |
5027 | *pp_i = -1; |
5028 | |
5029 | switch (ops[i].operand[0].type) { |
5030 | case OPT_REGMEM: |
5031 | // try to resolve struct member calls |
93b5bd18 |
5032 | pp = resolve_deref(i, i + opcnt * 19, &ops[i].operand[0], 0); |
5033 | if (pp != NULL) |
865f1aca |
5034 | break; |
865f1aca |
5035 | // fallthrough |
5036 | case OPT_LABEL: |
5037 | case OPT_OFFSET: |
93b5bd18 |
5038 | pp = try_recover_pp(&ops[i], &ops[i].operand[0], |
5039 | 1, &search_advice); |
865f1aca |
5040 | if (!search_advice) |
5041 | break; |
5042 | // fallthrough |
5043 | default: |
5044 | scan_for_call_type(i, &ops[i].operand[0], i + opcnt * 9, &pp, |
5045 | pp_i, multi_src); |
5046 | break; |
5047 | } |
5048 | |
5049 | return pp; |
5050 | } |
5051 | |
26677139 |
5052 | static struct parsed_proto *process_call_early(int i, int opcnt, |
5053 | int *adj_i) |
5054 | { |
5055 | struct parsed_op *po = &ops[i]; |
5056 | struct parsed_proto *pp; |
5057 | int multipath = 0; |
5058 | int adj = 0; |
bfacdc83 |
5059 | int j, ret; |
26677139 |
5060 | |
5061 | pp = po->pp; |
5062 | if (pp == NULL || pp->is_vararg || pp->argc_reg != 0) |
5063 | // leave for later |
5064 | return NULL; |
5065 | |
5066 | // look for and make use of esp adjust |
5067 | *adj_i = ret = -1; |
5068 | if (!pp->is_stdcall && pp->argc_stack > 0) |
5069 | ret = scan_for_esp_adjust(i + 1, opcnt, |
ee2361b9 |
5070 | pp->argc_stack * 4, &adj, &multipath, 0); |
26677139 |
5071 | if (ret >= 0) { |
5072 | if (pp->argc_stack > adj / 4) |
5073 | return NULL; |
5074 | if (multipath) |
5075 | return NULL; |
bfacdc83 |
5076 | if (ops[ret].op == OP_POP) { |
5077 | for (j = 1; j < adj / 4; j++) { |
5078 | if (ops[ret + j].op != OP_POP |
5079 | || ops[ret + j].operand[0].reg != xCX) |
5080 | { |
5081 | return NULL; |
5082 | } |
5083 | } |
5084 | } |
26677139 |
5085 | } |
5086 | |
5087 | *adj_i = ret; |
5088 | return pp; |
5089 | } |
5090 | |
9af2d373 |
5091 | static struct parsed_proto *process_call(int i, int opcnt) |
5092 | { |
5093 | struct parsed_op *po = &ops[i]; |
5094 | const struct parsed_proto *pp_c; |
5095 | struct parsed_proto *pp; |
5096 | const char *tmpname; |
db63af51 |
5097 | int call_i = -1, ref_i = -1; |
26677139 |
5098 | int adj = 0, multipath = 0; |
9af2d373 |
5099 | int ret, arg; |
5100 | |
5101 | tmpname = opr_name(po, 0); |
5102 | pp = po->pp; |
5103 | if (pp == NULL) |
5104 | { |
5105 | // indirect call |
db63af51 |
5106 | pp_c = resolve_icall(i, opcnt, &call_i, &multipath); |
9af2d373 |
5107 | if (pp_c != NULL) { |
5108 | if (!pp_c->is_func && !pp_c->is_fptr) |
5109 | ferr(po, "call to non-func: %s\n", pp_c->name); |
5110 | pp = proto_clone(pp_c); |
5111 | my_assert_not(pp, NULL); |
26677139 |
5112 | if (multipath) |
9af2d373 |
5113 | // not resolved just to single func |
5114 | pp->is_fptr = 1; |
5115 | |
5116 | switch (po->operand[0].type) { |
5117 | case OPT_REG: |
5118 | // we resolved this call and no longer need the register |
5119 | po->regmask_src &= ~(1 << po->operand[0].reg); |
db63af51 |
5120 | |
5121 | if (!multipath && i != call_i && ops[call_i].op == OP_MOV |
5122 | && ops[call_i].operand[1].type == OPT_LABEL) |
5123 | { |
5124 | // no other source users? |
e83ea7ed |
5125 | ret = resolve_last_ref(i, &po->operand[0], i + opcnt * 10, |
db63af51 |
5126 | &ref_i); |
5127 | if (ret == 1 && call_i == ref_i) { |
5128 | // and nothing uses it after us? |
5129 | ref_i = -1; |
b2bd20c0 |
5130 | find_next_read(i + 1, opcnt, &po->operand[0], |
5131 | i + opcnt * 11, &ref_i); |
5132 | if (ref_i == -1) |
db63af51 |
5133 | // then also don't need the source mov |
b2bd20c0 |
5134 | ops[call_i].flags |= OPF_RMD | OPF_NOREGS; |
db63af51 |
5135 | } |
5136 | } |
9af2d373 |
5137 | break; |
5138 | case OPT_REGMEM: |
5139 | pp->is_fptr = 1; |
5140 | break; |
5141 | default: |
5142 | break; |
5143 | } |
5144 | } |
5145 | if (pp == NULL) { |
5146 | pp = calloc(1, sizeof(*pp)); |
5147 | my_assert_not(pp, NULL); |
5148 | |
5149 | pp->is_fptr = 1; |
ee2361b9 |
5150 | ret = scan_for_esp_adjust(i + 1, opcnt, |
bfacdc83 |
5151 | -1, &adj, &multipath, 0); |
26677139 |
5152 | if (ret < 0 || adj < 0) { |
9af2d373 |
5153 | if (!g_allow_regfunc) |
5154 | ferr(po, "non-__cdecl indirect call unhandled yet\n"); |
5155 | pp->is_unresolved = 1; |
26677139 |
5156 | adj = 0; |
9af2d373 |
5157 | } |
26677139 |
5158 | adj /= 4; |
5159 | if (adj > ARRAY_SIZE(pp->arg)) |
5160 | ferr(po, "esp adjust too large: %d\n", adj); |
9af2d373 |
5161 | pp->ret_type.name = strdup("int"); |
26677139 |
5162 | pp->argc = pp->argc_stack = adj; |
9af2d373 |
5163 | for (arg = 0; arg < pp->argc; arg++) |
5164 | pp->arg[arg].type.name = strdup("int"); |
5165 | } |
5166 | po->pp = pp; |
5167 | } |
5168 | |
5169 | // look for and make use of esp adjust |
91ca764a |
5170 | multipath = 0; |
9af2d373 |
5171 | ret = -1; |
bfacdc83 |
5172 | if (!pp->is_stdcall && pp->argc_stack > 0) { |
5173 | int adj_expect = pp->is_vararg ? -1 : pp->argc_stack * 4; |
9af2d373 |
5174 | ret = scan_for_esp_adjust(i + 1, opcnt, |
bfacdc83 |
5175 | adj_expect, &adj, &multipath, 0); |
5176 | } |
9af2d373 |
5177 | if (ret >= 0) { |
5178 | if (pp->is_vararg) { |
26677139 |
5179 | if (adj / 4 < pp->argc_stack) { |
5180 | fnote(po, "(this call)\n"); |
5181 | ferr(&ops[ret], "esp adjust is too small: %x < %x\n", |
5182 | adj, pp->argc_stack * 4); |
5183 | } |
9af2d373 |
5184 | // modify pp to make it have varargs as normal args |
5185 | arg = pp->argc; |
26677139 |
5186 | pp->argc += adj / 4 - pp->argc_stack; |
9af2d373 |
5187 | for (; arg < pp->argc; arg++) { |
5188 | pp->arg[arg].type.name = strdup("int"); |
5189 | pp->argc_stack++; |
5190 | } |
5191 | if (pp->argc > ARRAY_SIZE(pp->arg)) |
5192 | ferr(po, "too many args for '%s'\n", tmpname); |
5193 | } |
26677139 |
5194 | if (pp->argc_stack > adj / 4) { |
56b49358 |
5195 | if (pp->is_noreturn) |
5196 | // assume no stack adjust was emited |
5197 | goto out; |
9af2d373 |
5198 | fnote(po, "(this call)\n"); |
5199 | ferr(&ops[ret], "stack tracking failed for '%s': %x %x\n", |
26677139 |
5200 | tmpname, pp->argc_stack * 4, adj); |
9af2d373 |
5201 | } |
5202 | |
ee2361b9 |
5203 | scan_for_esp_adjust(i + 1, opcnt, |
5204 | pp->argc_stack * 4, &adj, &multipath, 1); |
9af2d373 |
5205 | } |
5206 | else if (pp->is_vararg) |
5207 | ferr(po, "missing esp_adjust for vararg func '%s'\n", |
5208 | pp->name); |
5209 | |
56b49358 |
5210 | out: |
9af2d373 |
5211 | return pp; |
5212 | } |
5213 | |
b62264bc |
5214 | static void mark_float_arg(struct parsed_op *po, |
5215 | struct parsed_proto *pp, int arg, int *regmask_ffca) |
5216 | { |
5217 | po->p_argnext = -1; |
5218 | po->p_argnum = arg + 1; |
5219 | ferr_assert(po, pp->arg[arg].datap == NULL); |
5220 | pp->arg[arg].datap = po; |
5221 | po->flags |= OPF_DONE | OPF_FARGNR | OPF_FARG; |
5222 | if (regmask_ffca != NULL) |
5223 | *regmask_ffca |= 1 << arg; |
5224 | } |
5225 | |
5226 | static int check_for_stp(int i, int i_to) |
5227 | { |
5228 | struct parsed_op *po; |
5229 | |
5230 | for (; i < i_to; i++) { |
5231 | po = &ops[i]; |
5232 | if (po->op == OP_FST) |
5233 | return i; |
5234 | if (g_labels[i] != NULL || (po->flags & OPF_JMP)) |
5235 | return -1; |
5236 | if (po->op == OP_CALL || po->op == OP_PUSH || po->op == OP_POP) |
5237 | return -1; |
5238 | if (po->op == OP_ADD && po->operand[0].reg == xSP) |
5239 | return -1; |
5240 | } |
5241 | |
5242 | return -1; |
5243 | } |
5244 | |
30620174 |
5245 | static int collect_call_args_no_push(int i, struct parsed_proto *pp, |
5246 | int *regmask_ffca) |
5247 | { |
5248 | struct parsed_op *po; |
5249 | int offset = 0; |
5250 | int base_arg; |
5251 | int j, arg; |
5252 | int ret; |
5253 | |
5254 | for (base_arg = 0; base_arg < pp->argc; base_arg++) |
5255 | if (pp->arg[base_arg].reg == NULL) |
5256 | break; |
5257 | |
5258 | for (j = i; j > 0; ) |
5259 | { |
5260 | ferr_assert(&ops[j], g_labels[j] == NULL); |
5261 | j--; |
5262 | |
5263 | po = &ops[j]; |
5264 | ferr_assert(po, po->op != OP_PUSH); |
5265 | if (po->op == OP_FST) |
5266 | { |
5267 | if (po->operand[0].type != OPT_REGMEM) |
5268 | continue; |
5269 | ret = parse_stack_esp_offset(po, po->operand[0].name, &offset); |
5270 | if (ret != 0) |
5271 | continue; |
71d50aa7 |
5272 | if (offset < 0 || offset >= pp->argc_stack * 4 || (offset & 3)) { |
5273 | //ferr(po, "offset %d, %d args\n", offset, pp->argc_stack); |
5274 | continue; |
5275 | } |
30620174 |
5276 | |
5277 | arg = base_arg + offset / 4; |
b62264bc |
5278 | mark_float_arg(po, pp, arg, regmask_ffca); |
30620174 |
5279 | } |
5280 | else if (po->op == OP_SUB && po->operand[0].reg == xSP |
5281 | && po->operand[1].type == OPT_CONST) |
5282 | { |
5283 | po->flags |= OPF_RMD | OPF_DONE | OPF_FARGNR | OPF_FARG; |
5284 | break; |
5285 | } |
5286 | } |
5287 | |
5288 | for (arg = base_arg; arg < pp->argc; arg++) { |
5289 | ferr_assert(&ops[i], pp->arg[arg].reg == NULL); |
5290 | po = pp->arg[arg].datap; |
5291 | if (po == NULL) |
5292 | ferr(&ops[i], "arg %d/%d not found\n", arg, pp->argc); |
5293 | if (po->operand[0].lmod == OPLM_QWORD) |
5294 | arg++; |
5295 | } |
5296 | |
5297 | return 0; |
5298 | } |
5299 | |
5300 | static int collect_call_args_early(int i, struct parsed_proto *pp, |
5301 | int *regmask, int *regmask_ffca) |
26677139 |
5302 | { |
30620174 |
5303 | struct parsed_op *po; |
26677139 |
5304 | int arg, ret; |
b62264bc |
5305 | int offset; |
5306 | int j, k; |
26677139 |
5307 | |
5308 | for (arg = 0; arg < pp->argc; arg++) |
5309 | if (pp->arg[arg].reg == NULL) |
5310 | break; |
5311 | |
5312 | // first see if it can be easily done |
5313 | for (j = i; j > 0 && arg < pp->argc; ) |
5314 | { |
5315 | if (g_labels[j] != NULL) |
5316 | return -1; |
5317 | j--; |
5318 | |
30620174 |
5319 | po = &ops[j]; |
5320 | if (po->op == OP_CALL) |
26677139 |
5321 | return -1; |
30620174 |
5322 | else if (po->op == OP_ADD && po->operand[0].reg == xSP) |
26677139 |
5323 | return -1; |
30620174 |
5324 | else if (po->op == OP_POP) |
26677139 |
5325 | return -1; |
30620174 |
5326 | else if (po->flags & OPF_CJMP) |
26677139 |
5327 | return -1; |
30620174 |
5328 | else if (po->op == OP_PUSH) { |
5329 | if (po->flags & (OPF_FARG|OPF_FARGNR)) |
26677139 |
5330 | return -1; |
622eb2ef |
5331 | if (!g_header_mode) { |
30620174 |
5332 | ret = scan_for_mod(po, j + 1, i, 1); |
622eb2ef |
5333 | if (ret >= 0) |
5334 | return -1; |
5335 | } |
26677139 |
5336 | |
5337 | if (pp->arg[arg].type.is_va_list) |
5338 | return -1; |
5339 | |
5340 | // next arg |
5341 | for (arg++; arg < pp->argc; arg++) |
5342 | if (pp->arg[arg].reg == NULL) |
5343 | break; |
5344 | } |
30620174 |
5345 | else if (po->op == OP_SUB && po->operand[0].reg == xSP |
5346 | && po->operand[1].type == OPT_CONST) |
5347 | { |
5348 | if (po->flags & (OPF_RMD|OPF_DONE)) |
5349 | return -1; |
5350 | if (po->operand[1].val != pp->argc_stack * 4) |
5351 | ferr(po, "unexpected esp adjust: %d\n", |
5352 | po->operand[1].val * 4); |
5353 | ferr_assert(po, pp->argc - arg == pp->argc_stack); |
5354 | return collect_call_args_no_push(i, pp, regmask_ffca); |
5355 | } |
26677139 |
5356 | } |
5357 | |
5358 | if (arg < pp->argc) |
5359 | return -1; |
5360 | |
5361 | // now do it |
5362 | for (arg = 0; arg < pp->argc; arg++) |
5363 | if (pp->arg[arg].reg == NULL) |
5364 | break; |
5365 | |
5366 | for (j = i; j > 0 && arg < pp->argc; ) |
5367 | { |
5368 | j--; |
5369 | |
5370 | if (ops[j].op == OP_PUSH) |
5371 | { |
5372 | ops[j].p_argnext = -1; |
5373 | ferr_assert(&ops[j], pp->arg[arg].datap == NULL); |
26677139 |
5374 | |
b62264bc |
5375 | k = check_for_stp(j + 1, i); |
5376 | if (k != -1) { |
5377 | // push ecx; fstp dword ptr [esp] |
5378 | ret = parse_stack_esp_offset(&ops[k], |
5379 | ops[k].operand[0].name, &offset); |
5380 | if (ret == 0 && offset == 0) { |
5381 | if (!pp->arg[arg].type.is_float) |
5382 | ferr(&ops[i], "arg %d should be float\n", arg + 1); |
5383 | mark_float_arg(&ops[k], pp, arg, regmask_ffca); |
5384 | } |
5385 | } |
5386 | |
5387 | if (pp->arg[arg].datap == NULL) { |
5388 | pp->arg[arg].datap = &ops[j]; |
5389 | if (regmask != NULL && ops[j].operand[0].type == OPT_REG) |
5390 | *regmask |= 1 << ops[j].operand[0].reg; |
5391 | } |
26677139 |
5392 | |
5e49b270 |
5393 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_FARGNR | OPF_FARG; |
26677139 |
5394 | ops[j].flags &= ~OPF_RSAVE; |
5395 | |
5396 | // next arg |
5397 | for (arg++; arg < pp->argc; arg++) |
5398 | if (pp->arg[arg].reg == NULL) |
5399 | break; |
5400 | } |
5401 | } |
5402 | |
5403 | return 0; |
5404 | } |
5405 | |
8c83cc48 |
5406 | static int sync_argnum(struct parsed_op *po, int argnum) |
5407 | { |
5408 | struct parsed_op *po_tmp; |
5409 | |
5410 | // see if other branches don't have higher argnum |
5411 | for (po_tmp = po; po_tmp != NULL; ) { |
5412 | if (argnum < po_tmp->p_argnum) |
5413 | argnum = po_tmp->p_argnum; |
5414 | // note: p_argnext is active on current collect_call_args only |
5415 | po_tmp = po_tmp->p_argnext >= 0 ? &ops[po_tmp->p_argnext] : NULL; |
5416 | } |
5417 | |
5418 | // make all argnums consistent |
5419 | for (po_tmp = po; po_tmp != NULL; ) { |
5420 | if (po_tmp->p_argnum != 0) |
5421 | po_tmp->p_argnum = argnum; |
5422 | po_tmp = po_tmp->p_argnext >= 0 ? &ops[po_tmp->p_argnext] : NULL; |
5423 | } |
5424 | |
5425 | return argnum; |
5426 | } |
5427 | |
89ff3147 |
5428 | static int collect_call_args_r(struct parsed_op *po, int i, |
8c83cc48 |
5429 | struct parsed_proto *pp, int *regmask, int *arg_grp, |
5430 | int arg, int argnum, int magic, int need_op_saving, int may_reuse) |
e56ab892 |
5431 | { |
5432 | struct parsed_proto *pp_tmp; |
3a5101d7 |
5433 | struct parsed_op *po_tmp; |
e56ab892 |
5434 | struct label_ref *lr; |
2b43685d |
5435 | int need_to_save_current; |
3a5101d7 |
5436 | int arg_grp_current = 0; |
5437 | int save_args_seen = 0; |
e56ab892 |
5438 | int ret = 0; |
5f70a34f |
5439 | int reg; |
23fd0b11 |
5440 | char buf[32]; |
5441 | int j, k; |
e56ab892 |
5442 | |
a3684be1 |
5443 | if (i < 0) { |
a2c1d768 |
5444 | ferr(po, "dead label encountered\n"); |
a3684be1 |
5445 | return -1; |
5446 | } |
e56ab892 |
5447 | |
8c83cc48 |
5448 | for (; arg < pp->argc; arg++, argnum++) |
e56ab892 |
5449 | if (pp->arg[arg].reg == NULL) |
5450 | break; |
a3684be1 |
5451 | magic = (magic & 0xffffff) | (arg << 24); |
e56ab892 |
5452 | |
89ff3147 |
5453 | for (j = i; j >= 0 && (arg < pp->argc || pp->is_unresolved); ) |
e56ab892 |
5454 | { |
a3684be1 |
5455 | if (((ops[j].cc_scratch ^ magic) & 0xffffff) == 0) { |
5456 | if (ops[j].cc_scratch != magic) { |
5457 | ferr(&ops[j], "arg collect hit same path with diff args for %s\n", |
5458 | pp->name); |
5459 | return -1; |
5460 | } |
5461 | // ok: have already been here |
5462 | return 0; |
5463 | } |
5464 | ops[j].cc_scratch = magic; |
5465 | |
d7857c3a |
5466 | if (g_labels[j] != NULL && g_label_refs[j].i != -1) { |
e56ab892 |
5467 | lr = &g_label_refs[j]; |
5468 | if (lr->next != NULL) |
5469 | need_op_saving = 1; |
a652aa9f |
5470 | for (; lr->next; lr = lr->next) { |
92d715b6 |
5471 | check_i(&ops[j], lr->i); |
5c024ef7 |
5472 | if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP) |
a652aa9f |
5473 | may_reuse = 1; |
8c83cc48 |
5474 | ret = collect_call_args_r(po, lr->i, pp, regmask, arg_grp, |
5475 | arg, argnum, magic, need_op_saving, may_reuse); |
a3684be1 |
5476 | if (ret < 0) |
5477 | return ret; |
a652aa9f |
5478 | } |
e56ab892 |
5479 | |
92d715b6 |
5480 | check_i(&ops[j], lr->i); |
5c024ef7 |
5481 | if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP) |
a652aa9f |
5482 | may_reuse = 1; |
de50b98b |
5483 | if (j > 0 && LAST_OP(j - 1)) { |
e56ab892 |
5484 | // follow last branch in reverse |
5485 | j = lr->i; |
5486 | continue; |
5487 | } |
5488 | need_op_saving = 1; |
8c83cc48 |
5489 | ret = collect_call_args_r(po, lr->i, pp, regmask, arg_grp, |
5490 | arg, argnum, magic, need_op_saving, may_reuse); |
a3684be1 |
5491 | if (ret < 0) |
5492 | return ret; |
e56ab892 |
5493 | } |
5494 | j--; |
5495 | |
5496 | if (ops[j].op == OP_CALL) |
5497 | { |
89ff3147 |
5498 | if (pp->is_unresolved) |
5499 | break; |
5500 | |
092f64e1 |
5501 | pp_tmp = ops[j].pp; |
e56ab892 |
5502 | if (pp_tmp == NULL) |
56b49358 |
5503 | ferr(po, "arg collect %d/%d hit unparsed call '%s'\n", |
5504 | arg, pp->argc, ops[j].operand[0].name); |
a652aa9f |
5505 | if (may_reuse && pp_tmp->argc_stack > 0) |
de50b98b |
5506 | ferr(po, "arg collect %d/%d hit '%s' with %d stack args\n", |
5507 | arg, pp->argc, opr_name(&ops[j], 0), pp_tmp->argc_stack); |
e56ab892 |
5508 | } |
fdd5548a |
5509 | // esp adjust of 0 means we collected it before |
5510 | else if (ops[j].op == OP_ADD && ops[j].operand[0].reg == xSP |
5511 | && (ops[j].operand[1].type != OPT_CONST |
5512 | || ops[j].operand[1].val != 0)) |
5513 | { |
89ff3147 |
5514 | if (pp->is_unresolved) |
5515 | break; |
5516 | |
2b70f6d3 |
5517 | fnote(po, "(this call)\n"); |
5518 | ferr(&ops[j], "arg collect %d/%d hit esp adjust of %d\n", |
fdd5548a |
5519 | arg, pp->argc, ops[j].operand[1].val); |
de50b98b |
5520 | } |
5e49b270 |
5521 | else if (ops[j].op == OP_POP && !(ops[j].flags & OPF_DONE)) |
9af2d373 |
5522 | { |
89ff3147 |
5523 | if (pp->is_unresolved) |
5524 | break; |
5525 | |
2b70f6d3 |
5526 | fnote(po, "(this call)\n"); |
5527 | ferr(&ops[j], "arg collect %d/%d hit pop\n", arg, pp->argc); |
de50b98b |
5528 | } |
5c024ef7 |
5529 | else if (ops[j].flags & OPF_CJMP) |
de50b98b |
5530 | { |
89ff3147 |
5531 | if (pp->is_unresolved) |
5532 | break; |
5533 | |
a652aa9f |
5534 | may_reuse = 1; |
de50b98b |
5535 | } |
91ca764a |
5536 | else if (ops[j].op == OP_PUSH |
5537 | && !(ops[j].flags & (OPF_FARGNR|OPF_DONE))) |
e56ab892 |
5538 | { |
89ff3147 |
5539 | if (pp->is_unresolved && (ops[j].flags & OPF_RMD)) |
5540 | break; |
5541 | |
3a5101d7 |
5542 | ops[j].p_argnext = -1; |
5543 | po_tmp = pp->arg[arg].datap; |
5544 | if (po_tmp != NULL) |
5545 | ops[j].p_argnext = po_tmp - ops; |
e56ab892 |
5546 | pp->arg[arg].datap = &ops[j]; |
3a5101d7 |
5547 | |
8c83cc48 |
5548 | argnum = sync_argnum(&ops[j], argnum); |
5549 | |
2b43685d |
5550 | need_to_save_current = 0; |
5f70a34f |
5551 | reg = -1; |
5552 | if (ops[j].operand[0].type == OPT_REG) |
5553 | reg = ops[j].operand[0].reg; |
5554 | |
e56ab892 |
5555 | if (!need_op_saving) { |
89ff3147 |
5556 | ret = scan_for_mod(&ops[j], j + 1, i, 1); |
2b43685d |
5557 | need_to_save_current = (ret >= 0); |
e56ab892 |
5558 | } |
2b43685d |
5559 | if (need_op_saving || need_to_save_current) { |
8c83cc48 |
5560 | // mark this arg as one that needs operand saving |
5561 | pp->arg[arg].is_saved = 1; |
3a5101d7 |
5562 | |
8c83cc48 |
5563 | if (save_args_seen & (1 << (argnum - 1))) { |
3a5101d7 |
5564 | save_args_seen = 0; |
5565 | arg_grp_current++; |
5566 | if (arg_grp_current >= MAX_ARG_GRP) |
5567 | ferr(&ops[j], "out of arg groups (arg%d), f %s\n", |
8c83cc48 |
5568 | argnum, pp->name); |
3a5101d7 |
5569 | } |
e56ab892 |
5570 | } |
5f70a34f |
5571 | else if (ops[j].p_argnum == 0) |
e56ab892 |
5572 | ops[j].flags |= OPF_RMD; |
5573 | |
a652aa9f |
5574 | // some PUSHes are reused by different calls on other branches, |
de50b98b |
5575 | // but that can't happen if we didn't branch, so they |
5576 | // can be removed from future searches (handles nested calls) |
a652aa9f |
5577 | if (!may_reuse) |
9af2d373 |
5578 | ops[j].flags |= OPF_FARGNR; |
de50b98b |
5579 | |
9af2d373 |
5580 | ops[j].flags |= OPF_FARG; |
da87ae38 |
5581 | ops[j].flags &= ~OPF_RSAVE; |
5582 | |
23fd0b11 |
5583 | // check for __VALIST |
04abc5d6 |
5584 | if (!pp->is_unresolved && g_func_pp != NULL |
5585 | && pp->arg[arg].type.is_va_list) |
5586 | { |
23fd0b11 |
5587 | k = -1; |
92d715b6 |
5588 | ret = resolve_origin(j, &ops[j].operand[0], |
5589 | magic + 1, &k, NULL); |
5f70a34f |
5590 | if (ret == 1 && k >= 0) |
23fd0b11 |
5591 | { |
5f70a34f |
5592 | if (ops[k].op == OP_LEA) { |
acd03176 |
5593 | if (!g_func_pp->is_vararg) |
5594 | ferr(&ops[k], "lea <arg> used, but %s is not vararg?\n", |
5595 | g_func_pp->name); |
5596 | |
5f70a34f |
5597 | snprintf(buf, sizeof(buf), "arg_%X", |
5598 | g_func_pp->argc_stack * 4); |
acd03176 |
5599 | if (strstr(ops[k].operand[1].name, buf) |
5600 | || strstr(ops[k].operand[1].name, "arglist")) |
5f70a34f |
5601 | { |
b2bd20c0 |
5602 | ops[k].flags |= OPF_RMD | OPF_NOREGS | OPF_DONE; |
5603 | ops[j].flags |= OPF_RMD | OPF_NOREGS | OPF_VAPUSH; |
8c83cc48 |
5604 | pp->arg[arg].is_saved = 0; |
5f70a34f |
5605 | reg = -1; |
5606 | } |
5607 | else |
acd03176 |
5608 | ferr(&ops[k], "va_list arg detection failed\n"); |
5f70a34f |
5609 | } |
5610 | // check for va_list from g_func_pp arg too |
5611 | else if (ops[k].op == OP_MOV |
5612 | && is_stack_access(&ops[k], &ops[k].operand[1])) |
5613 | { |
5614 | ret = stack_frame_access(&ops[k], &ops[k].operand[1], |
5615 | buf, sizeof(buf), ops[k].operand[1].name, "", 1, 0); |
5616 | if (ret >= 0) { |
5e49b270 |
5617 | ops[k].flags |= OPF_RMD | OPF_DONE; |
5f70a34f |
5618 | ops[j].flags |= OPF_RMD; |
5619 | ops[j].p_argpass = ret + 1; |
8c83cc48 |
5620 | pp->arg[arg].is_saved = 0; |
5f70a34f |
5621 | reg = -1; |
5622 | } |
5623 | } |
23fd0b11 |
5624 | } |
5625 | } |
5626 | |
8c83cc48 |
5627 | if (pp->arg[arg].is_saved) { |
5628 | ops[j].flags &= ~OPF_RMD; |
5629 | ops[j].p_argnum = argnum; |
5630 | } |
23fd0b11 |
5631 | |
5632 | // tracking reg usage |
5f70a34f |
5633 | if (reg >= 0) |
5634 | *regmask |= 1 << reg; |
23fd0b11 |
5635 | |
89ff3147 |
5636 | arg++; |
8c83cc48 |
5637 | argnum++; |
89ff3147 |
5638 | if (!pp->is_unresolved) { |
5639 | // next arg |
8c83cc48 |
5640 | for (; arg < pp->argc; arg++, argnum++) |
89ff3147 |
5641 | if (pp->arg[arg].reg == NULL) |
5642 | break; |
5643 | } |
a3684be1 |
5644 | magic = (magic & 0xffffff) | (arg << 24); |
e56ab892 |
5645 | } |
3a5101d7 |
5646 | |
5647 | if (ops[j].p_arggrp > arg_grp_current) { |
5648 | save_args_seen = 0; |
5649 | arg_grp_current = ops[j].p_arggrp; |
5650 | } |
5651 | if (ops[j].p_argnum > 0) |
5652 | save_args_seen |= 1 << (ops[j].p_argnum - 1); |
e56ab892 |
5653 | } |
5654 | |
5655 | if (arg < pp->argc) { |
5656 | ferr(po, "arg collect failed for '%s': %d/%d\n", |
5657 | pp->name, arg, pp->argc); |
89ff3147 |
5658 | return -1; |
e56ab892 |
5659 | } |
89ff3147 |
5660 | |
3a5101d7 |
5661 | if (arg_grp_current > *arg_grp) |
5662 | *arg_grp = arg_grp_current; |
5663 | |
89ff3147 |
5664 | return arg; |
5665 | } |
5666 | |
5667 | static int collect_call_args(struct parsed_op *po, int i, |
8c83cc48 |
5668 | struct parsed_proto *pp, int *regmask, int magic) |
89ff3147 |
5669 | { |
3a5101d7 |
5670 | // arg group is for cases when pushes for |
5671 | // multiple funcs are going on |
5672 | struct parsed_op *po_tmp; |
3a5101d7 |
5673 | int arg_grp = 0; |
89ff3147 |
5674 | int ret; |
5675 | int a; |
5676 | |
8c83cc48 |
5677 | ret = collect_call_args_r(po, i, pp, regmask, &arg_grp, |
5678 | 0, 1, magic, 0, 0); |
89ff3147 |
5679 | if (ret < 0) |
5680 | return ret; |
5681 | |
57b1b785 |
5682 | if (pp->is_unresolved) { |
5683 | pp->argc += ret; |
5684 | pp->argc_stack += ret; |
5685 | for (a = 0; a < pp->argc; a++) |
5686 | if (pp->arg[a].type.name == NULL) |
5687 | pp->arg[a].type.name = strdup("int"); |
5688 | } |
5689 | |
3a5101d7 |
5690 | if (arg_grp != 0) { |
5691 | // propagate arg_grp |
5692 | for (a = 0; a < pp->argc; a++) { |
5693 | if (pp->arg[a].reg != NULL) |
5694 | continue; |
5695 | |
5696 | po_tmp = pp->arg[a].datap; |
5697 | while (po_tmp != NULL) { |
5698 | po_tmp->p_arggrp = arg_grp; |
8c83cc48 |
5699 | po_tmp = po_tmp->p_argnext >= 0 ? &ops[po_tmp->p_argnext] : NULL; |
3a5101d7 |
5700 | } |
5701 | } |
5702 | } |
3a5101d7 |
5703 | |
e56ab892 |
5704 | return ret; |
5705 | } |
5706 | |
b2bd20c0 |
5707 | static void reg_use_pass(int i, int opcnt, unsigned char *cbits, |
5708 | int regmask_now, int *regmask, |
5709 | int regmask_save_now, int *regmask_save, |
5710 | int *regmask_init, int regmask_arg) |
5711 | { |
5712 | struct parsed_op *po; |
5713 | int already_saved; |
5714 | int regmask_new; |
5715 | int regmask_op; |
5716 | int flags_set; |
5717 | int ret, reg; |
5718 | int j; |
5719 | |
5720 | for (; i < opcnt; i++) |
5721 | { |
5722 | po = &ops[i]; |
5723 | if (cbits[i >> 3] & (1 << (i & 7))) |
5724 | return; |
5725 | cbits[i >> 3] |= (1 << (i & 7)); |
5726 | |
5727 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
5728 | if (po->flags & (OPF_RMD|OPF_DONE)) |
5729 | continue; |
5730 | if (po->btj != NULL) { |
5731 | for (j = 0; j < po->btj->count; j++) { |
5732 | check_i(po, po->btj->d[j].bt_i); |
5733 | reg_use_pass(po->btj->d[j].bt_i, opcnt, cbits, |
5734 | regmask_now, regmask, regmask_save_now, regmask_save, |
5735 | regmask_init, regmask_arg); |
5736 | } |
5737 | return; |
5738 | } |
5739 | |
5740 | check_i(po, po->bt_i); |
5741 | if (po->flags & OPF_CJMP) |
5742 | reg_use_pass(po->bt_i, opcnt, cbits, |
5743 | regmask_now, regmask, regmask_save_now, regmask_save, |
5744 | regmask_init, regmask_arg); |
5745 | else |
5746 | i = po->bt_i - 1; |
5747 | continue; |
5748 | } |
5749 | |
5750 | if (po->op == OP_PUSH && !(po->flags & (OPF_FARG|OPF_DONE)) |
5751 | && !g_func_pp->is_userstack |
5752 | && po->operand[0].type == OPT_REG) |
5753 | { |
7a3c5555 |
5754 | int save_level = 0; |
5755 | |
b2bd20c0 |
5756 | reg = po->operand[0].reg; |
5757 | ferr_assert(po, reg >= 0); |
5758 | |
5759 | already_saved = 0; |
5760 | flags_set = OPF_RSAVE | OPF_RMD | OPF_DONE; |
5761 | if (regmask_now & (1 << reg)) { |
5762 | already_saved = regmask_save_now & (1 << reg); |
5763 | flags_set = OPF_RSAVE | OPF_DONE; |
7a3c5555 |
5764 | save_level++; |
b2bd20c0 |
5765 | } |
5766 | |
7a3c5555 |
5767 | ret = scan_for_pop(i + 1, opcnt, i + opcnt * 3, |
5768 | reg, 0, 0, save_level, 0); |
b2bd20c0 |
5769 | if (ret == 1) { |
93b5bd18 |
5770 | scan_for_pop(i + 1, opcnt, i + opcnt * 4, |
7a3c5555 |
5771 | reg, 0, 0, save_level, flags_set); |
b2bd20c0 |
5772 | } |
5773 | else { |
5774 | ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, 0); |
5775 | if (ret == 1) { |
5776 | scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, |
5777 | flags_set); |
5778 | } |
5779 | } |
5780 | if (ret == 1) { |
5781 | ferr_assert(po, !already_saved); |
5782 | po->flags |= flags_set; |
5783 | |
5784 | if (regmask_now & (1 << reg)) { |
5785 | regmask_save_now |= (1 << reg); |
5786 | *regmask_save |= regmask_save_now; |
5787 | } |
5788 | continue; |
5789 | } |
5790 | } |
5791 | else if (po->op == OP_POP && (po->flags & OPF_RSAVE)) { |
5792 | reg = po->operand[0].reg; |
5793 | ferr_assert(po, reg >= 0); |
5794 | |
5795 | if (regmask_save_now & (1 << reg)) |
5796 | regmask_save_now &= ~(1 << reg); |
5797 | else |
5798 | regmask_now &= ~(1 << reg); |
5799 | continue; |
5800 | } |
5801 | else if (po->op == OP_CALL) { |
5802 | if ((po->regmask_dst & (1 << xAX)) |
5803 | && !(po->regmask_dst & (1 << xDX))) |
5804 | { |
5805 | if (po->flags & OPF_TAIL) |
5806 | // don't need eax, will do "return f();" or "f(); return;" |
5807 | po->regmask_dst &= ~(1 << xAX); |
5808 | else { |
427da1c9 |
5809 | find_next_read_reg(i + 1, opcnt, xAX, OPLM_DWORD, |
5810 | i + opcnt * 17, &j); |
b2bd20c0 |
5811 | if (j == -1) |
5812 | // not used |
5813 | po->regmask_dst &= ~(1 << xAX); |
5814 | } |
5815 | } |
fe18df39 |
5816 | |
5817 | // not "full stack" mode and have something in stack |
5818 | if (!(regmask_now & mxST7_2) && (regmask_now & mxST1_0)) |
5819 | ferr(po, "float stack is not empty on func call\n"); |
b2bd20c0 |
5820 | } |
5821 | |
5822 | if (po->flags & OPF_NOREGS) |
5823 | continue; |
5824 | |
acd03176 |
5825 | // if incomplete register is used, clear it on init to avoid |
5826 | // later use of uninitialized upper part in some situations |
5827 | if ((po->flags & OPF_DATA) && po->operand[0].type == OPT_REG |
5828 | && po->operand[0].lmod != OPLM_DWORD) |
5829 | { |
5830 | reg = po->operand[0].reg; |
5831 | ferr_assert(po, reg >= 0); |
5832 | |
5833 | if (!(regmask_now & (1 << reg))) |
5834 | *regmask_init |= 1 << reg; |
5835 | } |
5836 | |
b2bd20c0 |
5837 | regmask_op = po->regmask_src | po->regmask_dst; |
5838 | |
5839 | regmask_new = po->regmask_src & ~regmask_now & ~regmask_arg; |
5840 | regmask_new &= ~(1 << xSP); |
5841 | if (g_bp_frame && !(po->flags & OPF_EBP_S)) |
5842 | regmask_new &= ~(1 << xBP); |
5843 | |
b2bd20c0 |
5844 | if (regmask_new != 0) |
5845 | fnote(po, "uninitialized reg mask: %x\n", regmask_new); |
5846 | |
5847 | if (regmask_op & (1 << xBP)) { |
5848 | if (g_bp_frame && !(po->flags & OPF_EBP_S)) { |
5849 | if (po->regmask_dst & (1 << xBP)) |
5850 | // compiler decided to drop bp frame and use ebp as scratch |
5851 | scan_fwd_set_flags(i + 1, opcnt, i + opcnt * 5, OPF_EBP_S); |
5852 | else |
5853 | regmask_op &= ~(1 << xBP); |
5854 | } |
5855 | } |
5856 | |
622eb2ef |
5857 | if (po->flags & OPF_FPUSH) { |
5858 | if (regmask_now & mxST1) |
5859 | regmask_now |= mxSTa; // switch to "full stack" mode |
5860 | if (regmask_now & mxSTa) |
5861 | po->flags |= OPF_FSHIFT; |
5862 | if (!(regmask_now & mxST7_2)) { |
5863 | regmask_now = |
5864 | (regmask_now & ~mxST1_0) | ((regmask_now & mxST0) << 1); |
5865 | } |
5866 | } |
5867 | |
b2bd20c0 |
5868 | regmask_now |= regmask_op; |
5869 | *regmask |= regmask_now; |
5870 | |
d4a985bd |
5871 | // released regs |
88eed95d |
5872 | if (po->flags & OPF_FPOPP) { |
5873 | if ((regmask_now & mxSTa) == 0) |
5874 | ferr(po, "float pop on empty stack?\n"); |
5875 | if (regmask_now & mxST7_2) |
5876 | po->flags |= OPF_FSHIFT; |
5877 | if (!(regmask_now & mxST7_2)) |
5878 | regmask_now &= ~mxST1_0; |
5879 | } |
5880 | else if (po->flags & OPF_FPOP) { |
fe18df39 |
5881 | if ((regmask_now & mxSTa) == 0) |
d4a985bd |
5882 | ferr(po, "float pop on empty stack?\n"); |
fe18df39 |
5883 | if (regmask_now & (mxST7_2 | mxST1)) |
d4a985bd |
5884 | po->flags |= OPF_FSHIFT; |
fe18df39 |
5885 | if (!(regmask_now & mxST7_2)) { |
5886 | regmask_now = |
5887 | (regmask_now & ~mxST1_0) | ((regmask_now & mxST1) >> 1); |
5888 | } |
d4a985bd |
5889 | } |
5890 | |
5891 | if (po->flags & OPF_TAIL) { |
16057ce1 |
5892 | if (!(regmask_now & mxST7_2)) { |
5893 | if (get_pp_arg_regmask_dst(g_func_pp) & mxST0) { |
5894 | if (!(regmask_now & mxST0)) |
5895 | ferr(po, "no st0 on float return, mask: %x\n", |
5896 | regmask_now); |
5897 | } |
5898 | else if (regmask_now & mxST1_0) |
5899 | ferr(po, "float regs on tail: %x\n", regmask_now); |
5900 | } |
4d247254 |
5901 | |
5902 | // there is support for "conditional tailcall", sort of |
5903 | if (!(po->flags & OPF_CC)) |
5904 | return; |
d4a985bd |
5905 | } |
b2bd20c0 |
5906 | } |
5907 | } |
5908 | |
89ff3147 |
5909 | static void pp_insert_reg_arg(struct parsed_proto *pp, const char *reg) |
5910 | { |
5911 | int i; |
5912 | |
5913 | for (i = 0; i < pp->argc; i++) |
5914 | if (pp->arg[i].reg == NULL) |
5915 | break; |
5916 | |
5917 | if (pp->argc_stack) |
5918 | memmove(&pp->arg[i + 1], &pp->arg[i], |
5919 | sizeof(pp->arg[0]) * pp->argc_stack); |
5920 | memset(&pp->arg[i], 0, sizeof(pp->arg[i])); |
5921 | pp->arg[i].reg = strdup(reg); |
5922 | pp->arg[i].type.name = strdup("int"); |
5923 | pp->argc++; |
5924 | pp->argc_reg++; |
5925 | } |
5926 | |
f9327ad4 |
5927 | static void output_std_flag_z(FILE *fout, struct parsed_op *po, |
04f8a628 |
5928 | int *pfomask, const char *dst_opr_text) |
5929 | { |
5930 | if (*pfomask & (1 << PFO_Z)) { |
5931 | fprintf(fout, "\n cond_z = (%s%s == 0);", |
5932 | lmod_cast_u(po, po->operand[0].lmod), dst_opr_text); |
5933 | *pfomask &= ~(1 << PFO_Z); |
5934 | } |
f9327ad4 |
5935 | } |
5936 | |
5937 | static void output_std_flag_s(FILE *fout, struct parsed_op *po, |
5938 | int *pfomask, const char *dst_opr_text) |
5939 | { |
04f8a628 |
5940 | if (*pfomask & (1 << PFO_S)) { |
5941 | fprintf(fout, "\n cond_s = (%s%s < 0);", |
5942 | lmod_cast_s(po, po->operand[0].lmod), dst_opr_text); |
5943 | *pfomask &= ~(1 << PFO_S); |
5944 | } |
5945 | } |
5946 | |
f9327ad4 |
5947 | static void output_std_flags(FILE *fout, struct parsed_op *po, |
5948 | int *pfomask, const char *dst_opr_text) |
5949 | { |
5950 | output_std_flag_z(fout, po, pfomask, dst_opr_text); |
5951 | output_std_flag_s(fout, po, pfomask, dst_opr_text); |
5952 | } |
5953 | |
c0de9015 |
5954 | enum { |
5955 | OPP_FORCE_NORETURN = (1 << 0), |
5956 | OPP_SIMPLE_ARGS = (1 << 1), |
5957 | OPP_ALIGN = (1 << 2), |
5958 | }; |
5959 | |
c0050df6 |
5960 | static void output_pp_attrs(FILE *fout, const struct parsed_proto *pp, |
c0de9015 |
5961 | int flags) |
c0050df6 |
5962 | { |
c0de9015 |
5963 | const char *cconv = ""; |
5964 | |
c0050df6 |
5965 | if (pp->is_fastcall) |
c0de9015 |
5966 | cconv = "__fastcall "; |
c0050df6 |
5967 | else if (pp->is_stdcall && pp->argc_reg == 0) |
c0de9015 |
5968 | cconv = "__stdcall "; |
5969 | |
5970 | fprintf(fout, (flags & OPP_ALIGN) ? "%-16s" : "%s", cconv); |
5971 | |
5972 | if (pp->is_noreturn || (flags & OPP_FORCE_NORETURN)) |
c0050df6 |
5973 | fprintf(fout, "noreturn "); |
5974 | } |
5975 | |
c0de9015 |
5976 | static void output_pp(FILE *fout, const struct parsed_proto *pp, |
5977 | int flags) |
5978 | { |
5979 | int i; |
5980 | |
5981 | fprintf(fout, (flags & OPP_ALIGN) ? "%-5s" : "%s ", |
5982 | pp->ret_type.name); |
5983 | if (pp->is_fptr) |
5984 | fprintf(fout, "("); |
5985 | output_pp_attrs(fout, pp, flags); |
5986 | if (pp->is_fptr) |
5987 | fprintf(fout, "*"); |
5988 | fprintf(fout, "%s", pp->name); |
5989 | if (pp->is_fptr) |
5990 | fprintf(fout, ")"); |
5991 | |
5992 | fprintf(fout, "("); |
5993 | for (i = 0; i < pp->argc; i++) { |
5994 | if (i > 0) |
5995 | fprintf(fout, ", "); |
93b5bd18 |
5996 | if (pp->arg[i].pp != NULL && pp->arg[i].pp->is_func |
5997 | && !(flags & OPP_SIMPLE_ARGS)) |
5998 | { |
c0de9015 |
5999 | // func pointer |
93b5bd18 |
6000 | output_pp(fout, pp->arg[i].pp, 0); |
c0de9015 |
6001 | } |
6002 | else if (pp->arg[i].type.is_retreg) { |
6003 | fprintf(fout, "u32 *r_%s", pp->arg[i].reg); |
6004 | } |
6005 | else { |
6006 | fprintf(fout, "%s", pp->arg[i].type.name); |
6007 | if (!pp->is_fptr) |
6008 | fprintf(fout, " a%d", i + 1); |
6009 | } |
2c31fb4c |
6010 | |
6011 | if (pp->arg[i].type.is_64bit) |
6012 | i++; |
c0de9015 |
6013 | } |
6014 | if (pp->is_vararg) { |
6015 | if (i > 0) |
6016 | fprintf(fout, ", "); |
6017 | fprintf(fout, "..."); |
6018 | } |
6019 | fprintf(fout, ")"); |
6020 | } |
6021 | |
3a5101d7 |
6022 | static char *saved_arg_name(char *buf, size_t buf_size, int grp, int num) |
6023 | { |
6024 | char buf1[16]; |
6025 | |
6026 | buf1[0] = 0; |
6027 | if (grp > 0) |
6028 | snprintf(buf1, sizeof(buf1), "%d", grp); |
6029 | snprintf(buf, buf_size, "s%s_a%d", buf1, num); |
6030 | |
6031 | return buf; |
6032 | } |
6033 | |
9af2d373 |
6034 | static void gen_x_cleanup(int opcnt); |
6035 | |
91977a1c |
6036 | static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) |
6037 | { |
69a3cdfc |
6038 | struct parsed_op *po, *delayed_flag_op = NULL, *tmp_op; |
850c9265 |
6039 | struct parsed_opr *last_arith_dst = NULL; |
3ebea2cf |
6040 | char buf1[256], buf2[256], buf3[256], cast[64]; |
ddaf8bd7 |
6041 | struct parsed_proto *pp, *pp_tmp; |
4c45fa73 |
6042 | struct parsed_data *pd; |
3a5101d7 |
6043 | int save_arg_vars[MAX_ARG_GRP] = { 0, }; |
b2bd20c0 |
6044 | unsigned char cbits[MAX_OPS / 8]; |
497a6d6b |
6045 | const char *float_type; |
fe18df39 |
6046 | const char *float_st0; |
6047 | const char *float_st1; |
6048 | int need_float_stack = 0; |
16057ce1 |
6049 | int need_float_sw = 0; // status word |
108e9fe3 |
6050 | int need_tmp_var = 0; |
2fe80fdb |
6051 | int need_tmp64 = 0; |
fe18df39 |
6052 | int cond_vars = 0; |
91977a1c |
6053 | int had_decl = 0; |
3ebea2cf |
6054 | int label_pending = 0; |
497a6d6b |
6055 | int need_double = 0; |
f9327ad4 |
6056 | int stack_align = 0; |
2c31fb4c |
6057 | int stack_fsz_adj = 0; |
193c11bf |
6058 | int lock_handled = 0; |
16057ce1 |
6059 | int regmask_save = 0; // used regs saved/restored in this func |
b2bd20c0 |
6060 | int regmask_arg; // regs from this function args (fastcall, etc) |
6061 | int regmask_ret; // regs needed on ret |
25a330eb |
6062 | int regmask_now; // temp |
6063 | int regmask_init = 0; // regs that need zero initialization |
6064 | int regmask_pp = 0; // regs used in complex push-pop graph |
30620174 |
6065 | int regmask_ffca = 0; // float function call args |
25a330eb |
6066 | int regmask = 0; // used regs |
940e8e66 |
6067 | int pfomask = 0; |
64c59faf |
6068 | int found = 0; |
fe18df39 |
6069 | int dead_dst; |
91977a1c |
6070 | int no_output; |
4c45fa73 |
6071 | int i, j, l; |
91977a1c |
6072 | int arg; |
91977a1c |
6073 | int reg; |
6074 | int ret; |
6075 | |
1bafb621 |
6076 | g_bp_frame = g_sp_frame = g_stack_fsz = 0; |
a2c1d768 |
6077 | g_stack_frame_used = 0; |
ba93cc12 |
6078 | g_seh_size = 0; |
226e8df1 |
6079 | if (g_sct_func_attr & SCTFA_CLEAR_REGS) |
6080 | regmask_init = g_regmask_init; |
91977a1c |
6081 | |
36595fd2 |
6082 | g_func_pp = proto_parse(fhdr, funcn, 0); |
bd96f656 |
6083 | if (g_func_pp == NULL) |
91977a1c |
6084 | ferr(ops, "proto_parse failed for '%s'\n", funcn); |
6085 | |
b2bd20c0 |
6086 | regmask_arg = get_pp_arg_regmask_src(g_func_pp); |
6087 | regmask_ret = get_pp_arg_regmask_dst(g_func_pp); |
6088 | |
91977a1c |
6089 | // pass1: |
87bf6cec |
6090 | // - resolve all branches |
66bdb2b0 |
6091 | // - parse calls with labels |
6092 | resolve_branches_parse_calls(opcnt); |
840257f6 |
6093 | |
66bdb2b0 |
6094 | // pass2: |
6095 | // - handle ebp/esp frame, remove ops related to it |
f9327ad4 |
6096 | scan_prologue_epilogue(opcnt, &stack_align); |
87bf6cec |
6097 | |
2c31fb4c |
6098 | // handle a case where sf size is unalignment, but is |
6099 | // placed in a way that elements are still aligned |
6100 | if (g_stack_fsz & 4) { |
6101 | for (i = 0; i < g_eqcnt; i++) { |
6102 | if (g_eqs[i].lmod != OPLM_QWORD) |
6103 | continue; |
6104 | if (!(g_eqs[i].offset & 4)) { |
6105 | g_stack_fsz += 4; |
6106 | stack_fsz_adj = 4; |
6107 | } |
6108 | break; |
6109 | } |
6110 | } |
6111 | |
87bf6cec |
6112 | // pass3: |
a2c1d768 |
6113 | // - remove dead labels |
b2bd20c0 |
6114 | // - set regs needed at ret |
1bafb621 |
6115 | for (i = 0; i < opcnt; i++) |
6116 | { |
d7857c3a |
6117 | if (g_labels[i] != NULL && g_label_refs[i].i == -1) { |
6118 | free(g_labels[i]); |
6119 | g_labels[i] = NULL; |
6120 | } |
b2bd20c0 |
6121 | |
6122 | if (ops[i].op == OP_RET) |
6123 | ops[i].regmask_src |= regmask_ret; |
66bdb2b0 |
6124 | } |
a2c1d768 |
6125 | |
66bdb2b0 |
6126 | // pass4: |
6127 | // - process trivial calls |
6128 | for (i = 0; i < opcnt; i++) |
6129 | { |
69a3cdfc |
6130 | po = &ops[i]; |
5e49b270 |
6131 | if (po->flags & (OPF_RMD|OPF_DONE)) |
91977a1c |
6132 | continue; |
850c9265 |
6133 | |
d4e3b5db |
6134 | if (po->op == OP_CALL) |
26677139 |
6135 | { |
6136 | pp = process_call_early(i, opcnt, &j); |
6137 | if (pp != NULL) { |
30620174 |
6138 | if (!(po->flags & OPF_ATAIL)) { |
26677139 |
6139 | // since we know the args, try to collect them |
30620174 |
6140 | ret = collect_call_args_early(i, pp, ®mask, ®mask_ffca); |
6141 | if (ret != 0) |
26677139 |
6142 | pp = NULL; |
30620174 |
6143 | } |
26677139 |
6144 | } |
6145 | |
6146 | if (pp != NULL) { |
6147 | if (j >= 0) { |
6148 | // commit esp adjust |
5e49b270 |
6149 | if (ops[j].op != OP_POP) |
6150 | patch_esp_adjust(&ops[j], pp->argc_stack * 4); |
bfacdc83 |
6151 | else { |
6152 | for (l = 0; l < pp->argc_stack; l++) |
b2bd20c0 |
6153 | ops[j + l].flags |= OPF_DONE | OPF_RMD | OPF_NOREGS; |
bfacdc83 |
6154 | } |
26677139 |
6155 | } |
6156 | |
6157 | if (strstr(pp->ret_type.name, "int64")) |
6158 | need_tmp64 = 1; |
6159 | |
6160 | po->flags |= OPF_DONE; |
6161 | } |
6162 | } |
6163 | } |
6164 | |
66bdb2b0 |
6165 | // pass5: |
b2bd20c0 |
6166 | // - process calls, stage 2 |
6167 | // - handle some push/pop pairs |
6168 | // - scan for STD/CLD, propagate DF |
16057ce1 |
6169 | // - try to resolve needed x87 status word bits |
26677139 |
6170 | for (i = 0; i < opcnt; i++) |
6171 | { |
16057ce1 |
6172 | int mask, z_check; |
6173 | |
26677139 |
6174 | po = &ops[i]; |
b2bd20c0 |
6175 | if (po->flags & OPF_RMD) |
26677139 |
6176 | continue; |
6177 | |
b2bd20c0 |
6178 | if (po->op == OP_CALL) |
69a3cdfc |
6179 | { |
b2bd20c0 |
6180 | if (!(po->flags & OPF_DONE)) { |
6181 | pp = process_call(i, opcnt); |
91977a1c |
6182 | |
b2bd20c0 |
6183 | if (!pp->is_unresolved && !(po->flags & OPF_ATAIL)) { |
6184 | // since we know the args, collect them |
8c83cc48 |
6185 | collect_call_args(po, i, pp, ®mask, i + opcnt * 2); |
b2bd20c0 |
6186 | } |
6187 | // for unresolved, collect after other passes |
89ff3147 |
6188 | } |
2b43685d |
6189 | |
b2bd20c0 |
6190 | pp = po->pp; |
6191 | ferr_assert(po, pp != NULL); |
6192 | |
6193 | po->regmask_src |= get_pp_arg_regmask_src(pp); |
6194 | po->regmask_dst |= get_pp_arg_regmask_dst(pp); |
6195 | |
d4a985bd |
6196 | if (po->regmask_dst & mxST0) |
6197 | po->flags |= OPF_FPUSH; |
6198 | |
2b43685d |
6199 | if (strstr(pp->ret_type.name, "int64")) |
2fe80fdb |
6200 | need_tmp64 = 1; |
b2bd20c0 |
6201 | |
6202 | continue; |
91977a1c |
6203 | } |
b2bd20c0 |
6204 | |
6205 | if (po->flags & OPF_DONE) |
6206 | continue; |
6207 | |
16057ce1 |
6208 | switch (po->op) { |
6209 | case OP_PUSH: |
6210 | if (!(po->flags & OPF_FARG) && !(po->flags & OPF_RSAVE) |
6211 | && po->operand[0].type == OPT_CONST) |
6212 | { |
6213 | scan_for_pop_const(i, opcnt, i + opcnt * 12); |
6214 | } |
6215 | break; |
6216 | |
6217 | case OP_POP: |
e83ea7ed |
6218 | scan_pushes_for_pop(i, opcnt, ®mask_pp); |
16057ce1 |
6219 | break; |
6220 | |
6221 | case OP_STD: |
b2bd20c0 |
6222 | po->flags |= OPF_DF | OPF_RMD | OPF_DONE; |
6223 | scan_propagate_df(i + 1, opcnt); |
16057ce1 |
6224 | break; |
6225 | |
6226 | case OP_FNSTSW: |
6227 | need_float_sw = 1; |
6228 | if (po->operand[0].type != OPT_REG || po->operand[0].reg != xAX) |
6229 | ferr(po, "TODO: fnstsw to mem\n"); |
6230 | ret = resolve_used_bits(i + 1, opcnt, xAX, &mask, &z_check); |
6231 | if (ret != 0) |
6232 | ferr(po, "fnstsw resolve failed\n"); |
6233 | ret = adjust_prev_op(i, OP_FCOM, i + opcnt * 21, |
6234 | (void *)(long)(mask | (z_check << 16))); |
6235 | if (ret != 1) |
6236 | ferr(po, "failed to find fcom: %d\n", ret); |
6237 | break; |
6238 | |
6239 | default: |
6240 | break; |
b2bd20c0 |
6241 | } |
d4e3b5db |
6242 | } |
6243 | |
66bdb2b0 |
6244 | // pass6: |
d4e3b5db |
6245 | // - find POPs for PUSHes, rm both |
6246 | // - scan for all used registers |
b2bd20c0 |
6247 | memset(cbits, 0, sizeof(cbits)); |
226e8df1 |
6248 | reg_use_pass(0, opcnt, cbits, regmask_init, ®mask, |
b2bd20c0 |
6249 | 0, ®mask_save, ®mask_init, regmask_arg); |
6250 | |
11437ea1 |
6251 | need_float_stack = !!(regmask & mxST7_2); |
6252 | |
b2bd20c0 |
6253 | // pass7: |
d4e3b5db |
6254 | // - find flag set ops for their users |
b2bd20c0 |
6255 | // - do unresolved calls |
1bafb621 |
6256 | // - declare indirect functions |
16057ce1 |
6257 | // - other op specific processing |
26677139 |
6258 | for (i = 0; i < opcnt; i++) |
6259 | { |
d4e3b5db |
6260 | po = &ops[i]; |
5e49b270 |
6261 | if (po->flags & (OPF_RMD|OPF_DONE)) |
d4e3b5db |
6262 | continue; |
6263 | |
d4e3b5db |
6264 | if (po->flags & OPF_CC) |
6265 | { |
2b43685d |
6266 | int setters[16], cnt = 0, branched = 0; |
6267 | |
7f20f633 |
6268 | ret = scan_for_flag_set(i, opcnt, i + opcnt * 6, |
04f8a628 |
6269 | &branched, setters, &cnt); |
2b43685d |
6270 | if (ret < 0 || cnt <= 0) |
6271 | ferr(po, "unable to trace flag setter(s)\n"); |
6272 | if (cnt > ARRAY_SIZE(setters)) |
6273 | ferr(po, "too many flag setters\n"); |
d4e3b5db |
6274 | |
2b43685d |
6275 | for (j = 0; j < cnt; j++) |
6276 | { |
6277 | tmp_op = &ops[setters[j]]; // flag setter |
6278 | pfomask = 0; |
6279 | |
6280 | // to get nicer code, we try to delay test and cmp; |
6281 | // if we can't because of operand modification, or if we |
591721d7 |
6282 | // have arith op, or branch, make it calculate flags explicitly |
6283 | if (tmp_op->op == OP_TEST || tmp_op->op == OP_CMP) |
6284 | { |
89ff3147 |
6285 | if (branched || scan_for_mod(tmp_op, setters[j] + 1, i, 0) >= 0) |
092f64e1 |
6286 | pfomask = 1 << po->pfo; |
2b43685d |
6287 | } |
4741fdfe |
6288 | else if (tmp_op->op == OP_CMPS || tmp_op->op == OP_SCAS) { |
092f64e1 |
6289 | pfomask = 1 << po->pfo; |
591721d7 |
6290 | } |
2b43685d |
6291 | else { |
04f8a628 |
6292 | // see if we'll be able to handle based on op result |
6293 | if ((tmp_op->op != OP_AND && tmp_op->op != OP_OR |
092f64e1 |
6294 | && po->pfo != PFO_Z && po->pfo != PFO_S |
6295 | && po->pfo != PFO_P) |
04f8a628 |
6296 | || branched |
2b43685d |
6297 | || scan_for_mod_opr0(tmp_op, setters[j] + 1, i) >= 0) |
092f64e1 |
6298 | { |
6299 | pfomask = 1 << po->pfo; |
6300 | } |
2fe80fdb |
6301 | |
c8dbc5be |
6302 | if (tmp_op->op == OP_ADD && po->pfo == PFO_C) { |
6303 | propagate_lmod(tmp_op, &tmp_op->operand[0], |
6304 | &tmp_op->operand[1]); |
6305 | if (tmp_op->operand[0].lmod == OPLM_DWORD) |
6306 | need_tmp64 = 1; |
6307 | } |
2b43685d |
6308 | } |
6309 | if (pfomask) { |
6310 | tmp_op->pfomask |= pfomask; |
cb090db0 |
6311 | cond_vars |= pfomask; |
2b43685d |
6312 | } |
04f8a628 |
6313 | // note: may overwrite, currently not a problem |
6314 | po->datap = tmp_op; |
d4e3b5db |
6315 | } |
6316 | |
cb090db0 |
6317 | if (po->op == OP_RCL || po->op == OP_RCR |
6318 | || po->op == OP_ADC || po->op == OP_SBB) |
6319 | cond_vars |= 1 << PFO_C; |
d4e3b5db |
6320 | } |
092f64e1 |
6321 | |
622eb2ef |
6322 | switch (po->op) { |
6323 | case OP_CMPS: |
6324 | case OP_SCAS: |
cb090db0 |
6325 | cond_vars |= 1 << PFO_Z; |
622eb2ef |
6326 | break; |
6327 | |
6328 | case OP_MUL: |
c8dbc5be |
6329 | if (po->operand[0].lmod == OPLM_DWORD) |
6330 | need_tmp64 = 1; |
622eb2ef |
6331 | break; |
6332 | |
6333 | case OP_IMUL: |
6334 | if (po->operand_cnt == 1 && po->operand[0].lmod == OPLM_DWORD) |
6335 | need_tmp64 = 1; |
6336 | break; |
6337 | |
6338 | case OP_CALL: |
26677139 |
6339 | // note: resolved non-reg calls are OPF_DONE already |
092f64e1 |
6340 | pp = po->pp; |
b2bd20c0 |
6341 | ferr_assert(po, pp != NULL); |
89ff3147 |
6342 | |
6343 | if (pp->is_unresolved) { |
ddaf8bd7 |
6344 | int regmask_stack = 0; |
8c83cc48 |
6345 | collect_call_args(po, i, pp, ®mask, i + opcnt * 2); |
89ff3147 |
6346 | |
b74c31e3 |
6347 | // this is pretty rough guess: |
6348 | // see ecx and edx were pushed (and not their saved versions) |
6349 | for (arg = 0; arg < pp->argc; arg++) { |
8c83cc48 |
6350 | if (pp->arg[arg].reg != NULL && !pp->arg[arg].is_saved) |
b74c31e3 |
6351 | continue; |
6352 | |
6353 | tmp_op = pp->arg[arg].datap; |
6354 | if (tmp_op == NULL) |
6355 | ferr(po, "parsed_op missing for arg%d\n", arg); |
8c83cc48 |
6356 | if (tmp_op->operand[0].type == OPT_REG) |
b74c31e3 |
6357 | regmask_stack |= 1 << tmp_op->operand[0].reg; |
6358 | } |
6359 | |
57b1b785 |
6360 | // quick dumb check for potential reg-args |
6361 | for (j = i - 1; j >= 0 && ops[j].op == OP_MOV; j--) |
6362 | if (ops[j].operand[0].type == OPT_REG) |
6363 | regmask_stack &= ~(1 << ops[j].operand[0].reg); |
6364 | |
6365 | if ((regmask_stack & (mxCX|mxDX)) != (mxCX|mxDX) |
6366 | && ((regmask | regmask_arg) & (mxCX|mxDX))) |
89ff3147 |
6367 | { |
6368 | if (pp->argc_stack != 0 |
57b1b785 |
6369 | || ((regmask | regmask_arg) & (mxCX|mxDX))) |
89ff3147 |
6370 | { |
6371 | pp_insert_reg_arg(pp, "ecx"); |
c0050df6 |
6372 | pp->is_fastcall = 1; |
ddaf8bd7 |
6373 | regmask_init |= 1 << xCX; |
89ff3147 |
6374 | regmask |= 1 << xCX; |
6375 | } |
6376 | if (pp->argc_stack != 0 |
57b1b785 |
6377 | || ((regmask | regmask_arg) & mxDX)) |
89ff3147 |
6378 | { |
6379 | pp_insert_reg_arg(pp, "edx"); |
ddaf8bd7 |
6380 | regmask_init |= 1 << xDX; |
89ff3147 |
6381 | regmask |= 1 << xDX; |
6382 | } |
6383 | } |
c0050df6 |
6384 | |
6385 | // note: __cdecl doesn't fall into is_unresolved category |
6386 | if (pp->argc_stack > 0) |
6387 | pp->is_stdcall = 1; |
ddaf8bd7 |
6388 | } |
427da1c9 |
6389 | if (!(po->flags & OPF_TAIL) |
615dbae1 |
6390 | && !(g_sct_func_attr & SCTFA_NOWARN) && !g_nowarn_reguse) |
427da1c9 |
6391 | { |
6392 | // treat al write as overwrite to avoid many false positives |
6393 | if (IS(pp->ret_type.name, "void") || pp->ret_type.is_float) { |
6394 | find_next_read_reg(i + 1, opcnt, xAX, OPLM_BYTE, |
6395 | i + opcnt * 25, &j); |
6396 | if (j != -1) { |
6397 | fnote(po, "eax used after void/float ret call\n"); |
6398 | fnote(&ops[j], "(used here)\n"); |
6399 | } |
6400 | } |
6401 | if (!strstr(pp->ret_type.name, "int64")) { |
6402 | find_next_read_reg(i + 1, opcnt, xDX, OPLM_BYTE, |
6403 | i + opcnt * 26, &j); |
6404 | // indirect calls are often guessed, don't warn |
6405 | if (j != -1 && !IS_OP_INDIRECT_CALL(&ops[j])) { |
6406 | fnote(po, "edx used after 32bit ret call\n"); |
6407 | fnote(&ops[j], "(used here)\n"); |
6408 | } |
6409 | } |
6410 | j = 1; |
6411 | // msvc often relies on callee not modifying 'this' |
6412 | for (arg = 0; arg < pp->argc; arg++) { |
6413 | if (pp->arg[arg].reg && IS(pp->arg[arg].reg, "ecx")) { |
6414 | j = 0; |
6415 | break; |
6416 | } |
6417 | } |
6418 | if (j != 0) { |
6419 | find_next_read_reg(i + 1, opcnt, xCX, OPLM_BYTE, |
6420 | i + opcnt * 27, &j); |
6421 | if (j != -1 && !IS_OP_INDIRECT_CALL(&ops[j])) { |
6422 | fnote(po, "ecx used after call\n"); |
6423 | fnote(&ops[j], "(used here)\n"); |
6424 | } |
6425 | } |
6426 | } |
622eb2ef |
6427 | break; |
6428 | |
6429 | case OP_MOV: |
6430 | if (po->operand[0].pp != NULL && po->operand[1].pp != NULL) |
27ebfaed |
6431 | { |
622eb2ef |
6432 | // <var> = offset <something> |
6433 | if ((po->operand[1].pp->is_func || po->operand[1].pp->is_fptr) |
6434 | && !IS_START(po->operand[1].name, "off_")) |
6435 | { |
6436 | if (!po->operand[0].pp->is_fptr) |
6437 | ferr(po, "%s not declared as fptr when it should be\n", |
6438 | po->operand[0].name); |
6439 | if (pp_cmp_func(po->operand[0].pp, po->operand[1].pp)) { |
6440 | pp_print(buf1, sizeof(buf1), po->operand[0].pp); |
6441 | pp_print(buf2, sizeof(buf2), po->operand[1].pp); |
6442 | fnote(po, "var: %s\n", buf1); |
6443 | fnote(po, "func: %s\n", buf2); |
6444 | ferr(po, "^ mismatch\n"); |
6445 | } |
27ebfaed |
6446 | } |
6447 | } |
622eb2ef |
6448 | break; |
6449 | |
6450 | case OP_DIV: |
6451 | case OP_IDIV: |
acd03176 |
6452 | if (po->operand[0].lmod == OPLM_DWORD) { |
6453 | // 32bit division is common, look for it |
6454 | if (po->op == OP_DIV) |
6455 | ret = scan_for_reg_clear(i, xDX); |
6456 | else |
6457 | ret = scan_for_cdq_edx(i); |
6458 | if (ret >= 0) |
6459 | po->flags |= OPF_32BIT; |
6460 | else |
6461 | need_tmp64 = 1; |
6462 | } |
cb090db0 |
6463 | else |
acd03176 |
6464 | need_tmp_var = 1; |
622eb2ef |
6465 | break; |
6466 | |
6467 | case OP_CLD: |
5e49b270 |
6468 | po->flags |= OPF_RMD | OPF_DONE; |
622eb2ef |
6469 | break; |
6470 | |
6471 | case OP_RCL: |
6472 | case OP_RCR: |
6473 | case OP_XCHG: |
6474 | need_tmp_var = 1; |
6475 | break; |
6476 | |
6477 | case OP_FLD: |
6478 | if (po->operand[0].lmod == OPLM_QWORD) |
6479 | need_double = 1; |
6480 | break; |
6481 | |
193c11bf |
6482 | case OP_RDTSC: |
622eb2ef |
6483 | case OPP_ALLSHL: |
6484 | case OPP_ALLSHR: |
6485 | need_tmp64 = 1; |
6486 | break; |
6487 | |
427da1c9 |
6488 | case OPP_FTOL: |
6489 | find_next_read_reg(i + 1, opcnt, xDX, OPLM_DWORD, |
6490 | i + opcnt * 18, &j); |
d4a985bd |
6491 | if (j == -1) |
6492 | po->flags |= OPF_32BIT; |
622eb2ef |
6493 | break; |
cb090db0 |
6494 | |
622eb2ef |
6495 | default: |
6496 | break; |
6497 | } |
57b1b785 |
6498 | } |
6499 | |
6500 | // pass8: final adjustments |
6501 | for (i = 0; i < opcnt; i++) |
6502 | { |
6503 | po = &ops[i]; |
6504 | if (po->flags & (OPF_RMD|OPF_DONE)) |
6505 | continue; |
8c83cc48 |
6506 | |
8c83cc48 |
6507 | if (po->op != OP_FST && po->p_argnum > 0) |
6508 | save_arg_vars[po->p_arggrp] |= 1 << (po->p_argnum - 1); |
11437ea1 |
6509 | |
6510 | // correct for "full stack" mode late enable |
88eed95d |
6511 | if ((po->flags & (OPF_PPUSH|OPF_FPOP|OPF_FPOPP)) |
6512 | && need_float_stack) |
11437ea1 |
6513 | po->flags |= OPF_FSHIFT; |
91977a1c |
6514 | } |
6515 | |
497a6d6b |
6516 | float_type = need_double ? "double" : "float"; |
fe18df39 |
6517 | float_st0 = need_float_stack ? "f_st[f_stp & 7]" : "f_st0"; |
6518 | float_st1 = need_float_stack ? "f_st[(f_stp + 1) & 7]" : "f_st1"; |
497a6d6b |
6519 | |
60fe410c |
6520 | // output starts here |
6521 | |
ba93cc12 |
6522 | if (g_seh_found) |
6523 | fprintf(fout, "// had SEH\n"); |
6524 | |
60fe410c |
6525 | // define userstack size |
6526 | if (g_func_pp->is_userstack) { |
6527 | fprintf(fout, "#ifndef US_SZ_%s\n", g_func_pp->name); |
6528 | fprintf(fout, "#define US_SZ_%s USERSTACK_SIZE\n", g_func_pp->name); |
6529 | fprintf(fout, "#endif\n"); |
6530 | } |
6531 | |
6532 | // the function itself |
c0de9015 |
6533 | ferr_assert(ops, !g_func_pp->is_fptr); |
6534 | output_pp(fout, g_func_pp, |
6535 | (g_ida_func_attr & IDAFA_NORETURN) ? OPP_FORCE_NORETURN : 0); |
6536 | fprintf(fout, "\n{\n"); |
60fe410c |
6537 | |
6538 | // declare indirect functions |
6539 | for (i = 0; i < opcnt; i++) { |
6540 | po = &ops[i]; |
6541 | if (po->flags & OPF_RMD) |
6542 | continue; |
6543 | |
6544 | if (po->op == OP_CALL) { |
6545 | pp = po->pp; |
6546 | if (pp == NULL) |
6547 | ferr(po, "NULL pp\n"); |
6548 | |
6549 | if (pp->is_fptr && !(pp->name[0] != 0 && pp->is_arg)) { |
6550 | if (pp->name[0] != 0) { |
1fe8d40e |
6551 | if (IS_START(pp->name, "guess")) |
6552 | pp->is_guessed = 1; |
6553 | |
60fe410c |
6554 | memmove(pp->name + 2, pp->name, strlen(pp->name) + 1); |
6555 | memcpy(pp->name, "i_", 2); |
6556 | |
6557 | // might be declared already |
6558 | found = 0; |
6559 | for (j = 0; j < i; j++) { |
6560 | if (ops[j].op == OP_CALL && (pp_tmp = ops[j].pp)) { |
6561 | if (pp_tmp->is_fptr && IS(pp->name, pp_tmp->name)) { |
6562 | found = 1; |
6563 | break; |
6564 | } |
6565 | } |
6566 | } |
6567 | if (found) |
6568 | continue; |
6569 | } |
6570 | else |
6571 | snprintf(pp->name, sizeof(pp->name), "icall%d", i); |
6572 | |
c0de9015 |
6573 | fprintf(fout, " "); |
6574 | output_pp(fout, pp, OPP_SIMPLE_ARGS); |
6575 | fprintf(fout, ";\n"); |
60fe410c |
6576 | } |
6577 | } |
6578 | } |
da87ae38 |
6579 | |
4c45fa73 |
6580 | // output LUTs/jumptables |
6581 | for (i = 0; i < g_func_pd_cnt; i++) { |
6582 | pd = &g_func_pd[i]; |
6583 | fprintf(fout, " static const "); |
6584 | if (pd->type == OPT_OFFSET) { |
6585 | fprintf(fout, "void *jt_%s[] =\n { ", pd->label); |
6586 | |
6587 | for (j = 0; j < pd->count; j++) { |
6588 | if (j > 0) |
6589 | fprintf(fout, ", "); |
6590 | fprintf(fout, "&&%s", pd->d[j].u.label); |
6591 | } |
6592 | } |
6593 | else { |
6594 | fprintf(fout, "%s %s[] =\n { ", |
6595 | lmod_type_u(ops, pd->lmod), pd->label); |
6596 | |
6597 | for (j = 0; j < pd->count; j++) { |
6598 | if (j > 0) |
6599 | fprintf(fout, ", "); |
6600 | fprintf(fout, "%u", pd->d[j].u.val); |
6601 | } |
6602 | } |
6603 | fprintf(fout, " };\n"); |
1f84f6b3 |
6604 | had_decl = 1; |
4c45fa73 |
6605 | } |
6606 | |
4f12f671 |
6607 | // declare stack frame, va_arg |
1f84f6b3 |
6608 | if (g_stack_fsz) { |
2c31fb4c |
6609 | if (stack_fsz_adj) |
6610 | fprintf(fout, " // stack_fsz_adj %d\n", stack_fsz_adj); |
6611 | |
d4a985bd |
6612 | fprintf(fout, " union { u32 d[%d];", (g_stack_fsz + 3) / 4); |
6613 | if (g_func_lmods & (1 << OPLM_WORD)) |
6614 | fprintf(fout, " u16 w[%d];", (g_stack_fsz + 1) / 2); |
6615 | if (g_func_lmods & (1 << OPLM_BYTE)) |
6616 | fprintf(fout, " u8 b[%d];", g_stack_fsz); |
6617 | if (g_func_lmods & (1 << OPLM_QWORD)) |
6618 | fprintf(fout, " double q[%d];", (g_stack_fsz + 7) / 8); |
2c31fb4c |
6619 | |
f9327ad4 |
6620 | if (stack_align > 8) |
6621 | ferr(ops, "unhandled stack align of %d\n", stack_align); |
6622 | else if (stack_align == 8) |
6623 | fprintf(fout, " u64 align;"); |
d4a985bd |
6624 | fprintf(fout, " } sf;\n"); |
1f84f6b3 |
6625 | had_decl = 1; |
6626 | } |
6627 | |
193c11bf |
6628 | if ((g_sct_func_attr & SCTFA_ARGFRAME) && g_func_pp->argc_stack) { |
6629 | fprintf(fout, " struct { u32 "); |
6630 | for (i = j = 0; i < g_func_pp->argc; i++) { |
6631 | if (g_func_pp->arg[i].reg != NULL) |
6632 | continue; |
6633 | if (j++ != 0) |
6634 | fprintf(fout, ", "); |
6635 | fprintf(fout, "a%d", i + 1); |
6636 | } |
6637 | fprintf(fout, "; } af = {\n "); |
6638 | for (i = j = 0; i < g_func_pp->argc; i++) { |
6639 | if (g_func_pp->arg[i].reg != NULL) |
6640 | continue; |
6641 | if (j++ != 0) |
6642 | fprintf(fout, ", "); |
6643 | if (g_func_pp->arg[i].type.is_ptr) |
6644 | fprintf(fout, "(u32)"); |
6645 | fprintf(fout, "a%d", i + 1); |
6646 | } |
6647 | fprintf(fout, "\n };\n"); |
6648 | } |
6649 | |
1f84f6b3 |
6650 | if (g_func_pp->is_userstack) { |
60fe410c |
6651 | fprintf(fout, " u32 fake_sf[US_SZ_%s / 4];\n", g_func_pp->name); |
6652 | fprintf(fout, " u32 *esp = &fake_sf[sizeof(fake_sf) / 4];\n"); |
1f84f6b3 |
6653 | had_decl = 1; |
6654 | } |
850c9265 |
6655 | |
1f84f6b3 |
6656 | if (g_func_pp->is_vararg) { |
4f12f671 |
6657 | fprintf(fout, " va_list ap;\n"); |
1f84f6b3 |
6658 | had_decl = 1; |
6659 | } |
4f12f671 |
6660 | |
940e8e66 |
6661 | // declare arg-registers |
bd96f656 |
6662 | for (i = 0; i < g_func_pp->argc; i++) { |
6663 | if (g_func_pp->arg[i].reg != NULL) { |
91977a1c |
6664 | reg = char_array_i(regs_r32, |
bd96f656 |
6665 | ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg); |
75ad0378 |
6666 | if (regmask & (1 << reg)) { |
1f84f6b3 |
6667 | if (g_func_pp->arg[i].type.is_retreg) |
6668 | fprintf(fout, " u32 %s = *r_%s;\n", |
6669 | g_func_pp->arg[i].reg, g_func_pp->arg[i].reg); |
6670 | else |
6671 | fprintf(fout, " u32 %s = (u32)a%d;\n", |
6672 | g_func_pp->arg[i].reg, i + 1); |
75ad0378 |
6673 | } |
1f84f6b3 |
6674 | else { |
6675 | if (g_func_pp->arg[i].type.is_retreg) |
6676 | ferr(ops, "retreg '%s' is unused?\n", |
6677 | g_func_pp->arg[i].reg); |
75ad0378 |
6678 | fprintf(fout, " // %s = a%d; // unused\n", |
6679 | g_func_pp->arg[i].reg, i + 1); |
1f84f6b3 |
6680 | } |
91977a1c |
6681 | had_decl = 1; |
6682 | } |
6683 | } |
6684 | |
25a330eb |
6685 | // declare normal registers |
383dff16 |
6686 | regmask_now = regmask & ~regmask_arg & ~g_regmask_rm; |
75ad0378 |
6687 | regmask_now &= ~(1 << xSP); |
90307a99 |
6688 | if (regmask_now & 0x00ff) { |
91977a1c |
6689 | for (reg = 0; reg < 8; reg++) { |
75ad0378 |
6690 | if (regmask_now & (1 << reg)) { |
ddaf8bd7 |
6691 | fprintf(fout, " u32 %s", regs_r32[reg]); |
6692 | if (regmask_init & (1 << reg)) |
6693 | fprintf(fout, " = 0"); |
6694 | fprintf(fout, ";\n"); |
91977a1c |
6695 | had_decl = 1; |
6696 | } |
6697 | } |
6698 | } |
d4a985bd |
6699 | // ... mmx |
90307a99 |
6700 | if (regmask_now & 0xff00) { |
6701 | for (reg = 8; reg < 16; reg++) { |
6702 | if (regmask_now & (1 << reg)) { |
6703 | fprintf(fout, " mmxr %s", regs_r32[reg]); |
6704 | if (regmask_init & (1 << reg)) |
6705 | fprintf(fout, " = { 0, }"); |
6706 | fprintf(fout, ";\n"); |
6707 | had_decl = 1; |
6708 | } |
6709 | } |
6710 | } |
d4a985bd |
6711 | // ... x87 |
fe18df39 |
6712 | if (need_float_stack) { |
6713 | fprintf(fout, " %s f_st[8];\n", float_type); |
6714 | fprintf(fout, " int f_stp = 0;\n"); |
6715 | had_decl = 1; |
6716 | } |
6717 | else { |
6718 | if (regmask_now & 0xff0000) { |
6719 | for (reg = 16; reg < 24; reg++) { |
6720 | if (regmask_now & (1 << reg)) { |
6721 | fprintf(fout, " %s f_st%d", float_type, reg - 16); |
6722 | if (regmask_init & (1 << reg)) |
6723 | fprintf(fout, " = 0"); |
6724 | fprintf(fout, ";\n"); |
6725 | had_decl = 1; |
6726 | } |
d4a985bd |
6727 | } |
6728 | } |
6729 | } |
91977a1c |
6730 | |
16057ce1 |
6731 | if (need_float_sw) { |
6732 | fprintf(fout, " u16 f_sw;\n"); |
6733 | had_decl = 1; |
6734 | } |
6735 | |
d4e3b5db |
6736 | if (regmask_save) { |
6737 | for (reg = 0; reg < 8; reg++) { |
6738 | if (regmask_save & (1 << reg)) { |
6739 | fprintf(fout, " u32 s_%s;\n", regs_r32[reg]); |
6740 | had_decl = 1; |
6741 | } |
6742 | } |
6743 | } |
6744 | |
3a5101d7 |
6745 | for (i = 0; i < ARRAY_SIZE(save_arg_vars); i++) { |
6746 | if (save_arg_vars[i] == 0) |
6747 | continue; |
69a3cdfc |
6748 | for (reg = 0; reg < 32; reg++) { |
3a5101d7 |
6749 | if (save_arg_vars[i] & (1 << reg)) { |
6750 | fprintf(fout, " u32 %s;\n", |
6751 | saved_arg_name(buf1, sizeof(buf1), i, reg + 1)); |
69a3cdfc |
6752 | had_decl = 1; |
6753 | } |
6754 | } |
6755 | } |
6756 | |
30620174 |
6757 | if (regmask_ffca) { |
6758 | for (reg = 0; reg < 32; reg++) { |
6759 | if (regmask_ffca & (1 << reg)) { |
6760 | fprintf(fout, " %s fs_%d;\n", float_type, reg + 1); |
6761 | had_decl = 1; |
6762 | } |
6763 | } |
6764 | } |
6765 | |
25a330eb |
6766 | // declare push-pop temporaries |
6767 | if (regmask_pp) { |
6768 | for (reg = 0; reg < 8; reg++) { |
6769 | if (regmask_pp & (1 << reg)) { |
6770 | fprintf(fout, " u32 pp_%s;\n", regs_r32[reg]); |
6771 | had_decl = 1; |
6772 | } |
6773 | } |
6774 | } |
6775 | |
cb090db0 |
6776 | if (cond_vars) { |
69a3cdfc |
6777 | for (i = 0; i < 8; i++) { |
cb090db0 |
6778 | if (cond_vars & (1 << i)) { |
69a3cdfc |
6779 | fprintf(fout, " u32 cond_%s;\n", parsed_flag_op_names[i]); |
6780 | had_decl = 1; |
6781 | } |
6782 | } |
6783 | } |
6784 | |
108e9fe3 |
6785 | if (need_tmp_var) { |
6786 | fprintf(fout, " u32 tmp;\n"); |
6787 | had_decl = 1; |
6788 | } |
6789 | |
2fe80fdb |
6790 | if (need_tmp64) { |
6791 | fprintf(fout, " u64 tmp64;\n"); |
87bf6cec |
6792 | had_decl = 1; |
6793 | } |
6794 | |
91977a1c |
6795 | if (had_decl) |
6796 | fprintf(fout, "\n"); |
6797 | |
7e08c224 |
6798 | // do stack clear, if needed |
6799 | if (g_sct_func_attr & SCTFA_CLEAR_SF) { |
6800 | fprintf(fout, " "); |
6801 | if (g_stack_clear_len != 0) { |
6802 | if (g_stack_clear_len <= 4) { |
6803 | for (i = 0; i < g_stack_clear_len; i++) |
6804 | fprintf(fout, "sf.d[%d] = ", g_stack_clear_start + i); |
6805 | fprintf(fout, "0;\n"); |
6806 | } |
6807 | else { |
6808 | fprintf(fout, "memset(&sf[%d], 0, %d);\n", |
6809 | g_stack_clear_start, g_stack_clear_len * 4); |
6810 | } |
6811 | } |
6812 | else |
6813 | fprintf(fout, "memset(&sf, 0, sizeof(sf));\n"); |
6814 | } |
6815 | |
bd96f656 |
6816 | if (g_func_pp->is_vararg) { |
6817 | if (g_func_pp->argc_stack == 0) |
4f12f671 |
6818 | ferr(ops, "vararg func without stack args?\n"); |
bd96f656 |
6819 | fprintf(fout, " va_start(ap, a%d);\n", g_func_pp->argc); |
4f12f671 |
6820 | } |
6821 | |
91977a1c |
6822 | // output ops |
69a3cdfc |
6823 | for (i = 0; i < opcnt; i++) |
6824 | { |
d7857c3a |
6825 | if (g_labels[i] != NULL) { |
91977a1c |
6826 | fprintf(fout, "\n%s:\n", g_labels[i]); |
3ebea2cf |
6827 | label_pending = 1; |
2b43685d |
6828 | |
6829 | delayed_flag_op = NULL; |
6830 | last_arith_dst = NULL; |
3ebea2cf |
6831 | } |
91977a1c |
6832 | |
69a3cdfc |
6833 | po = &ops[i]; |
6834 | if (po->flags & OPF_RMD) |
91977a1c |
6835 | continue; |
6836 | |
193c11bf |
6837 | lock_handled = 0; |
91977a1c |
6838 | no_output = 0; |
6839 | |
91977a1c |
6840 | #define assert_operand_cnt(n_) \ |
850c9265 |
6841 | if (po->operand_cnt != n_) \ |
6842 | ferr(po, "operand_cnt is %d/%d\n", po->operand_cnt, n_) |
6843 | |
69a3cdfc |
6844 | // conditional/flag using op? |
6845 | if (po->flags & OPF_CC) |
850c9265 |
6846 | { |
940e8e66 |
6847 | int is_delayed = 0; |
69a3cdfc |
6848 | |
04f8a628 |
6849 | tmp_op = po->datap; |
850c9265 |
6850 | |
69a3cdfc |
6851 | // we go through all this trouble to avoid using parsed_flag_op, |
6852 | // which makes generated code much nicer |
6853 | if (delayed_flag_op != NULL) |
850c9265 |
6854 | { |
092f64e1 |
6855 | out_cmp_test(buf1, sizeof(buf1), delayed_flag_op, |
6856 | po->pfo, po->pfo_inv); |
940e8e66 |
6857 | is_delayed = 1; |
91977a1c |
6858 | } |
850c9265 |
6859 | else if (last_arith_dst != NULL |
092f64e1 |
6860 | && (po->pfo == PFO_Z || po->pfo == PFO_S || po->pfo == PFO_P |
04f8a628 |
6861 | || (tmp_op && (tmp_op->op == OP_AND || tmp_op->op == OP_OR)) |
6862 | )) |
850c9265 |
6863 | { |
3ebea2cf |
6864 | out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst); |
092f64e1 |
6865 | out_test_for_cc(buf1, sizeof(buf1), po, po->pfo, po->pfo_inv, |
850c9265 |
6866 | last_arith_dst->lmod, buf3); |
940e8e66 |
6867 | is_delayed = 1; |
850c9265 |
6868 | } |
04f8a628 |
6869 | else if (tmp_op != NULL) { |
7ba45c34 |
6870 | // use preprocessed flag calc results |
092f64e1 |
6871 | if (!(tmp_op->pfomask & (1 << po->pfo))) |
6872 | ferr(po, "not prepared for pfo %d\n", po->pfo); |
69a3cdfc |
6873 | |
092f64e1 |
6874 | // note: pfo_inv was not yet applied |
69a3cdfc |
6875 | snprintf(buf1, sizeof(buf1), "(%scond_%s)", |
092f64e1 |
6876 | po->pfo_inv ? "!" : "", parsed_flag_op_names[po->pfo]); |
69a3cdfc |
6877 | } |
6878 | else { |
6879 | ferr(po, "all methods of finding comparison failed\n"); |
6880 | } |
850c9265 |
6881 | |
69a3cdfc |
6882 | if (po->flags & OPF_JMP) { |
092f64e1 |
6883 | fprintf(fout, " if %s", buf1); |
850c9265 |
6884 | } |
cb090db0 |
6885 | else if (po->op == OP_RCL || po->op == OP_RCR |
6886 | || po->op == OP_ADC || po->op == OP_SBB) |
6887 | { |
940e8e66 |
6888 | if (is_delayed) |
6889 | fprintf(fout, " cond_%s = %s;\n", |
092f64e1 |
6890 | parsed_flag_op_names[po->pfo], buf1); |
850c9265 |
6891 | } |
5101a5f9 |
6892 | else if (po->flags & OPF_DATA) { // SETcc |
850c9265 |
6893 | out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]); |
6894 | fprintf(fout, " %s = %s;", buf2, buf1); |
91977a1c |
6895 | } |
69a3cdfc |
6896 | else { |
6897 | ferr(po, "unhandled conditional op\n"); |
6898 | } |
91977a1c |
6899 | } |
6900 | |
940e8e66 |
6901 | pfomask = po->pfomask; |
6902 | |
850c9265 |
6903 | switch (po->op) |
91977a1c |
6904 | { |
6905 | case OP_MOV: |
6906 | assert_operand_cnt(2); |
850c9265 |
6907 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
de50b98b |
6908 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
c7ed83dd |
6909 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]); |
de50b98b |
6910 | fprintf(fout, " %s = %s;", buf1, |
3ebea2cf |
6911 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
c7ed83dd |
6912 | buf3, 0)); |
850c9265 |
6913 | break; |
6914 | |
6915 | case OP_LEA: |
6916 | assert_operand_cnt(2); |
87bf6cec |
6917 | po->operand[1].lmod = OPLM_DWORD; // always |
850c9265 |
6918 | fprintf(fout, " %s = %s;", |
6919 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
6920 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
6921 | NULL, 1)); |
850c9265 |
6922 | break; |
6923 | |
6924 | case OP_MOVZX: |
6925 | assert_operand_cnt(2); |
91977a1c |
6926 | fprintf(fout, " %s = %s;", |
850c9265 |
6927 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
6928 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
850c9265 |
6929 | break; |
6930 | |
6931 | case OP_MOVSX: |
6932 | assert_operand_cnt(2); |
6933 | switch (po->operand[1].lmod) { |
6934 | case OPLM_BYTE: |
6935 | strcpy(buf3, "(s8)"); |
6936 | break; |
6937 | case OPLM_WORD: |
6938 | strcpy(buf3, "(s16)"); |
6939 | break; |
6940 | default: |
6941 | ferr(po, "invalid src lmod: %d\n", po->operand[1].lmod); |
6942 | } |
a2c1d768 |
6943 | fprintf(fout, " %s = %s;", |
850c9265 |
6944 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
a2c1d768 |
6945 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
6946 | buf3, 0)); |
850c9265 |
6947 | break; |
6948 | |
108e9fe3 |
6949 | case OP_XCHG: |
6950 | assert_operand_cnt(2); |
6951 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
6952 | fprintf(fout, " tmp = %s;", |
6953 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], "", 0)); |
6954 | fprintf(fout, " %s = %s;", |
6955 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
c7ed83dd |
6956 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
6957 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0)); |
6958 | fprintf(fout, " %s = %stmp;", |
6959 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[1]), |
6960 | default_cast_to(buf3, sizeof(buf3), &po->operand[1])); |
108e9fe3 |
6961 | snprintf(g_comment, sizeof(g_comment), "xchg"); |
6962 | break; |
6963 | |
850c9265 |
6964 | case OP_NOT: |
6965 | assert_operand_cnt(1); |
6966 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
6967 | fprintf(fout, " %s = ~%s;", buf1, buf1); |
6968 | break; |
6969 | |
04abc5d6 |
6970 | case OP_XLAT: |
6971 | assert_operand_cnt(2); |
6972 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
6973 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
6974 | fprintf(fout, " %s = *(u8 *)(%s + %s);", buf1, buf2, buf1); |
6975 | strcpy(g_comment, "xlat"); |
6976 | break; |
6977 | |
5101a5f9 |
6978 | case OP_CDQ: |
6979 | assert_operand_cnt(2); |
6980 | fprintf(fout, " %s = (s32)%s >> 31;", |
6981 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
6982 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
5101a5f9 |
6983 | strcpy(g_comment, "cdq"); |
6984 | break; |
6985 | |
622eb2ef |
6986 | case OP_BSWAP: |
6987 | assert_operand_cnt(1); |
6988 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
6989 | fprintf(fout, " %s = __builtin_bswap32(%s);", buf1, buf1); |
6990 | break; |
6991 | |
092f64e1 |
6992 | case OP_LODS: |
092f64e1 |
6993 | if (po->flags & OPF_REP) { |
acd03176 |
6994 | assert_operand_cnt(3); |
092f64e1 |
6995 | // hmh.. |
6996 | ferr(po, "TODO\n"); |
6997 | } |
6998 | else { |
acd03176 |
6999 | assert_operand_cnt(2); |
3947cf24 |
7000 | fprintf(fout, " %s = %sesi; esi %c= %d;", |
7001 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[1]), |
7002 | lmod_cast_u_ptr(po, po->operand[1].lmod), |
092f64e1 |
7003 | (po->flags & OPF_DF) ? '-' : '+', |
3947cf24 |
7004 | lmod_bytes(po, po->operand[1].lmod)); |
092f64e1 |
7005 | strcpy(g_comment, "lods"); |
7006 | } |
7007 | break; |
7008 | |
33c35af6 |
7009 | case OP_STOS: |
33c35af6 |
7010 | if (po->flags & OPF_REP) { |
acd03176 |
7011 | assert_operand_cnt(3); |
591721d7 |
7012 | fprintf(fout, " for (; ecx != 0; ecx--, edi %c= %d)\n", |
7013 | (po->flags & OPF_DF) ? '-' : '+', |
3947cf24 |
7014 | lmod_bytes(po, po->operand[1].lmod)); |
193c11bf |
7015 | fprintf(fout, " %sedi = eax;\n", |
3947cf24 |
7016 | lmod_cast_u_ptr(po, po->operand[1].lmod)); |
193c11bf |
7017 | fprintf(fout, " barrier();"); |
7018 | strcpy(g_comment, "^ rep stos"); |
33c35af6 |
7019 | } |
7020 | else { |
acd03176 |
7021 | assert_operand_cnt(2); |
092f64e1 |
7022 | fprintf(fout, " %sedi = eax; edi %c= %d;", |
3947cf24 |
7023 | lmod_cast_u_ptr(po, po->operand[1].lmod), |
591721d7 |
7024 | (po->flags & OPF_DF) ? '-' : '+', |
3947cf24 |
7025 | lmod_bytes(po, po->operand[1].lmod)); |
33c35af6 |
7026 | strcpy(g_comment, "stos"); |
7027 | } |
7028 | break; |
7029 | |
d4e3b5db |
7030 | case OP_MOVS: |
d4e3b5db |
7031 | j = lmod_bytes(po, po->operand[0].lmod); |
7032 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
591721d7 |
7033 | l = (po->flags & OPF_DF) ? '-' : '+'; |
d4e3b5db |
7034 | if (po->flags & OPF_REP) { |
acd03176 |
7035 | assert_operand_cnt(3); |
d4e3b5db |
7036 | fprintf(fout, |
591721d7 |
7037 | " for (; ecx != 0; ecx--, edi %c= %d, esi %c= %d)\n", |
7038 | l, j, l, j); |
d4e3b5db |
7039 | fprintf(fout, |
193c11bf |
7040 | " %sedi = %sesi;\n", buf1, buf1); |
7041 | // this can overwrite many variables |
7042 | fprintf(fout, " barrier();"); |
7043 | strcpy(g_comment, "^ rep movs"); |
d4e3b5db |
7044 | } |
7045 | else { |
acd03176 |
7046 | assert_operand_cnt(2); |
092f64e1 |
7047 | fprintf(fout, " %sedi = %sesi; edi %c= %d; esi %c= %d;", |
591721d7 |
7048 | buf1, buf1, l, j, l, j); |
d4e3b5db |
7049 | strcpy(g_comment, "movs"); |
7050 | } |
7051 | break; |
7052 | |
7ba45c34 |
7053 | case OP_CMPS: |
7ba45c34 |
7054 | // repe ~ repeat while ZF=1 |
7ba45c34 |
7055 | j = lmod_bytes(po, po->operand[0].lmod); |
7056 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
591721d7 |
7057 | l = (po->flags & OPF_DF) ? '-' : '+'; |
7ba45c34 |
7058 | if (po->flags & OPF_REP) { |
acd03176 |
7059 | assert_operand_cnt(3); |
7ba45c34 |
7060 | fprintf(fout, |
7f20f633 |
7061 | " while (ecx != 0) {\n"); |
4741fdfe |
7062 | if (pfomask & (1 << PFO_C)) { |
7063 | // ugh.. |
7064 | fprintf(fout, |
05381e4a |
7065 | " cond_c = %sesi < %sedi;\n", buf1, buf1); |
4741fdfe |
7066 | pfomask &= ~(1 << PFO_C); |
7067 | } |
7ba45c34 |
7068 | fprintf(fout, |
05381e4a |
7069 | " cond_z = (%sesi == %sedi); esi %c= %d, edi %c= %d;\n", |
1f84f6b3 |
7070 | buf1, buf1, l, j, l, j); |
7071 | fprintf(fout, |
7f20f633 |
7072 | " ecx--;\n" |
1f84f6b3 |
7073 | " if (cond_z %s 0) break;\n", |
7074 | (po->flags & OPF_REPZ) ? "==" : "!="); |
7ba45c34 |
7075 | fprintf(fout, |
4741fdfe |
7076 | " }"); |
7ba45c34 |
7077 | snprintf(g_comment, sizeof(g_comment), "rep%s cmps", |
7078 | (po->flags & OPF_REPZ) ? "e" : "ne"); |
7079 | } |
7080 | else { |
acd03176 |
7081 | assert_operand_cnt(2); |
7ba45c34 |
7082 | fprintf(fout, |
05381e4a |
7083 | " cond_z = (%sesi == %sedi); esi %c= %d; edi %c= %d;", |
591721d7 |
7084 | buf1, buf1, l, j, l, j); |
7ba45c34 |
7085 | strcpy(g_comment, "cmps"); |
7086 | } |
7087 | pfomask &= ~(1 << PFO_Z); |
7088 | last_arith_dst = NULL; |
7089 | delayed_flag_op = NULL; |
7090 | break; |
7091 | |
591721d7 |
7092 | case OP_SCAS: |
7093 | // only does ZF (for now) |
7094 | // repe ~ repeat while ZF=1 |
3947cf24 |
7095 | j = lmod_bytes(po, po->operand[1].lmod); |
591721d7 |
7096 | l = (po->flags & OPF_DF) ? '-' : '+'; |
7097 | if (po->flags & OPF_REP) { |
acd03176 |
7098 | assert_operand_cnt(3); |
591721d7 |
7099 | fprintf(fout, |
7f20f633 |
7100 | " while (ecx != 0) {\n"); |
591721d7 |
7101 | fprintf(fout, |
1f84f6b3 |
7102 | " cond_z = (%seax == %sedi); edi %c= %d;\n", |
3947cf24 |
7103 | lmod_cast_u(po, po->operand[1].lmod), |
7104 | lmod_cast_u_ptr(po, po->operand[1].lmod), l, j); |
1f84f6b3 |
7105 | fprintf(fout, |
7f20f633 |
7106 | " ecx--;\n" |
1f84f6b3 |
7107 | " if (cond_z %s 0) break;\n", |
591721d7 |
7108 | (po->flags & OPF_REPZ) ? "==" : "!="); |
7109 | fprintf(fout, |
1f84f6b3 |
7110 | " }"); |
591721d7 |
7111 | snprintf(g_comment, sizeof(g_comment), "rep%s scas", |
7112 | (po->flags & OPF_REPZ) ? "e" : "ne"); |
7113 | } |
7114 | else { |
acd03176 |
7115 | assert_operand_cnt(2); |
05381e4a |
7116 | fprintf(fout, " cond_z = (%seax == %sedi); edi %c= %d;", |
3947cf24 |
7117 | lmod_cast_u(po, po->operand[1].lmod), |
7118 | lmod_cast_u_ptr(po, po->operand[1].lmod), l, j); |
591721d7 |
7119 | strcpy(g_comment, "scas"); |
7120 | } |
7121 | pfomask &= ~(1 << PFO_Z); |
7122 | last_arith_dst = NULL; |
7123 | delayed_flag_op = NULL; |
7124 | break; |
7125 | |
193c11bf |
7126 | case OP_RDTSC: |
7127 | fprintf(fout, " tmp64 = ext_rdtsc();\n"); |
7128 | fprintf(fout, " edx = tmp64 >> 32;\n"); |
7129 | fprintf(fout, " eax = tmp64;"); |
7130 | break; |
7131 | |
7132 | case OP_CPUID: |
7133 | fprintf(fout, " ext_cpuid(&eax, &ebx, &ecx, &edx);"); |
7134 | break; |
7135 | |
850c9265 |
7136 | // arithmetic w/flags |
850c9265 |
7137 | case OP_AND: |
2b70f6d3 |
7138 | if (po->operand[1].type == OPT_CONST && !po->operand[1].val) |
7139 | goto dualop_arith_const; |
7140 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
7141 | goto dualop_arith; |
7142 | |
850c9265 |
7143 | case OP_OR: |
5101a5f9 |
7144 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
2b70f6d3 |
7145 | if (po->operand[1].type == OPT_CONST) { |
7146 | j = lmod_bytes(po, po->operand[0].lmod); |
7147 | if (((1ull << j * 8) - 1) == po->operand[1].val) |
7148 | goto dualop_arith_const; |
7149 | } |
7150 | goto dualop_arith; |
7151 | |
850c9265 |
7152 | dualop_arith: |
7153 | assert_operand_cnt(2); |
850c9265 |
7154 | fprintf(fout, " %s %s= %s;", |
7155 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
7156 | op_to_c(po), |
3ebea2cf |
7157 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
04f8a628 |
7158 | output_std_flags(fout, po, &pfomask, buf1); |
7159 | last_arith_dst = &po->operand[0]; |
7160 | delayed_flag_op = NULL; |
7161 | break; |
7162 | |
2b70f6d3 |
7163 | dualop_arith_const: |
7164 | // and 0, or ~0 used instead mov |
7165 | assert_operand_cnt(2); |
7166 | fprintf(fout, " %s = %s;", |
7167 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
7168 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
7169 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0)); |
7170 | output_std_flags(fout, po, &pfomask, buf1); |
7171 | last_arith_dst = &po->operand[0]; |
7172 | delayed_flag_op = NULL; |
7173 | break; |
7174 | |
04f8a628 |
7175 | case OP_SHL: |
7176 | case OP_SHR: |
7177 | assert_operand_cnt(2); |
7178 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
7179 | if (pfomask & (1 << PFO_C)) { |
7180 | if (po->operand[1].type == OPT_CONST) { |
7181 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
7182 | j = po->operand[1].val; |
7183 | j %= l; |
7184 | if (j != 0) { |
7185 | if (po->op == OP_SHL) |
7186 | j = l - j; |
7187 | else |
7188 | j -= 1; |
cb090db0 |
7189 | fprintf(fout, " cond_c = (%s >> %d) & 1;\n", |
7190 | buf1, j); |
04f8a628 |
7191 | } |
7192 | else |
7193 | ferr(po, "zero shift?\n"); |
7194 | } |
7195 | else |
7196 | ferr(po, "TODO\n"); |
7197 | pfomask &= ~(1 << PFO_C); |
840257f6 |
7198 | } |
04abc5d6 |
7199 | fprintf(fout, " %s %s= %s", buf1, op_to_c(po), |
04f8a628 |
7200 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
04abc5d6 |
7201 | if (po->operand[1].type != OPT_CONST) |
7202 | fprintf(fout, " & 0x1f"); |
7203 | fprintf(fout, ";"); |
04f8a628 |
7204 | output_std_flags(fout, po, &pfomask, buf1); |
850c9265 |
7205 | last_arith_dst = &po->operand[0]; |
69a3cdfc |
7206 | delayed_flag_op = NULL; |
850c9265 |
7207 | break; |
7208 | |
d4e3b5db |
7209 | case OP_SAR: |
7210 | assert_operand_cnt(2); |
7211 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
7212 | fprintf(fout, " %s = %s%s >> %s;", buf1, |
7213 | lmod_cast_s(po, po->operand[0].lmod), buf1, |
3ebea2cf |
7214 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
04f8a628 |
7215 | output_std_flags(fout, po, &pfomask, buf1); |
d4e3b5db |
7216 | last_arith_dst = &po->operand[0]; |
7217 | delayed_flag_op = NULL; |
7218 | break; |
7219 | |
04abc5d6 |
7220 | case OP_SHLD: |
3b2f4044 |
7221 | case OP_SHRD: |
7222 | assert_operand_cnt(3); |
7223 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
7224 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
3b2f4044 |
7225 | out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[2]); |
acd03176 |
7226 | if (po->operand[2].type != OPT_CONST) { |
7227 | // no handling for "undefined" case, hopefully not needed |
7228 | snprintf(buf2, sizeof(buf2), "(%s & 0x1f)", buf3); |
7229 | strcpy(buf3, buf2); |
7230 | } |
7231 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
7232 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
04abc5d6 |
7233 | if (po->op == OP_SHLD) { |
7234 | fprintf(fout, " %s <<= %s; %s |= %s >> (%d - %s);", |
7235 | buf1, buf3, buf1, buf2, l, buf3); |
7236 | strcpy(g_comment, "shld"); |
7237 | } |
7238 | else { |
7239 | fprintf(fout, " %s >>= %s; %s |= %s << (%d - %s);", |
7240 | buf1, buf3, buf1, buf2, l, buf3); |
7241 | strcpy(g_comment, "shrd"); |
7242 | } |
3b2f4044 |
7243 | output_std_flags(fout, po, &pfomask, buf1); |
7244 | last_arith_dst = &po->operand[0]; |
7245 | delayed_flag_op = NULL; |
7246 | break; |
7247 | |
d4e3b5db |
7248 | case OP_ROL: |
7249 | case OP_ROR: |
7250 | assert_operand_cnt(2); |
7251 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
7252 | if (po->operand[1].type == OPT_CONST) { |
7253 | j = po->operand[1].val; |
7254 | j %= lmod_bytes(po, po->operand[0].lmod) * 8; |
7255 | fprintf(fout, po->op == OP_ROL ? |
7256 | " %s = (%s << %d) | (%s >> %d);" : |
7257 | " %s = (%s >> %d) | (%s << %d);", |
7258 | buf1, buf1, j, buf1, |
7259 | lmod_bytes(po, po->operand[0].lmod) * 8 - j); |
7260 | } |
7261 | else |
7262 | ferr(po, "TODO\n"); |
04f8a628 |
7263 | output_std_flags(fout, po, &pfomask, buf1); |
d4e3b5db |
7264 | last_arith_dst = &po->operand[0]; |
7265 | delayed_flag_op = NULL; |
7266 | break; |
7267 | |
cb090db0 |
7268 | case OP_RCL: |
7269 | case OP_RCR: |
7270 | assert_operand_cnt(2); |
7271 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
7272 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
7273 | if (po->operand[1].type == OPT_CONST) { |
7274 | j = po->operand[1].val % l; |
7275 | if (j == 0) |
7276 | ferr(po, "zero rotate\n"); |
7277 | fprintf(fout, " tmp = (%s >> %d) & 1;\n", |
7278 | buf1, (po->op == OP_RCL) ? (l - j) : (j - 1)); |
7279 | if (po->op == OP_RCL) { |
7280 | fprintf(fout, |
7281 | " %s = (%s << %d) | (cond_c << %d)", |
7282 | buf1, buf1, j, j - 1); |
7283 | if (j != 1) |
7284 | fprintf(fout, " | (%s >> %d)", buf1, l + 1 - j); |
7285 | } |
7286 | else { |
7287 | fprintf(fout, |
7288 | " %s = (%s >> %d) | (cond_c << %d)", |
7289 | buf1, buf1, j, l - j); |
7290 | if (j != 1) |
7291 | fprintf(fout, " | (%s << %d)", buf1, l + 1 - j); |
7292 | } |
7293 | fprintf(fout, ";\n"); |
7294 | fprintf(fout, " cond_c = tmp;"); |
7295 | } |
7296 | else |
7297 | ferr(po, "TODO\n"); |
7298 | strcpy(g_comment, (po->op == OP_RCL) ? "rcl" : "rcr"); |
7299 | output_std_flags(fout, po, &pfomask, buf1); |
7300 | last_arith_dst = &po->operand[0]; |
7301 | delayed_flag_op = NULL; |
7302 | break; |
7303 | |
5101a5f9 |
7304 | case OP_XOR: |
850c9265 |
7305 | assert_operand_cnt(2); |
7306 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
5101a5f9 |
7307 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
7308 | // special case for XOR |
7f20f633 |
7309 | int z = PFOB_O | PFOB_C | PFOB_S | (1 << PFO_L); |
7310 | for (j = 0; j <= PFO_LE; j++) { |
7311 | if (pfomask & (1 << j)) { |
7312 | fprintf(fout, " cond_%s = %d;\n", |
7313 | parsed_flag_op_names[j], (1 << j) & z ? 0 : 1); |
7314 | pfomask &= ~(1 << j); |
7315 | } |
2fe80fdb |
7316 | } |
5101a5f9 |
7317 | fprintf(fout, " %s = 0;", |
7318 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
7319 | last_arith_dst = &po->operand[0]; |
7320 | delayed_flag_op = NULL; |
850c9265 |
7321 | break; |
850c9265 |
7322 | } |
5101a5f9 |
7323 | goto dualop_arith; |
7324 | |
2fe80fdb |
7325 | case OP_ADD: |
7326 | assert_operand_cnt(2); |
7327 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
7328 | if (pfomask & (1 << PFO_C)) { |
c8dbc5be |
7329 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
7330 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
7331 | if (po->operand[0].lmod == OPLM_DWORD) { |
7332 | fprintf(fout, " tmp64 = (u64)%s + %s;\n", buf1, buf2); |
7333 | fprintf(fout, " cond_c = tmp64 >> 32;\n"); |
7334 | fprintf(fout, " %s = (u32)tmp64;", |
7335 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
d4a985bd |
7336 | strcat(g_comment, " add64"); |
c8dbc5be |
7337 | } |
7338 | else { |
7339 | fprintf(fout, " cond_c = ((u32)%s + %s) >> %d;\n", |
7340 | buf1, buf2, lmod_bytes(po, po->operand[0].lmod) * 8); |
7341 | fprintf(fout, " %s += %s;", |
7342 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
7343 | buf2); |
7344 | } |
2fe80fdb |
7345 | pfomask &= ~(1 << PFO_C); |
7346 | output_std_flags(fout, po, &pfomask, buf1); |
7347 | last_arith_dst = &po->operand[0]; |
7348 | delayed_flag_op = NULL; |
7349 | break; |
7350 | } |
16057ce1 |
7351 | if (pfomask & (1 << PFO_LE)) { |
7352 | out_cmp_for_cc(buf1, sizeof(buf1), po, PFO_LE, 0, 1); |
7353 | fprintf(fout, " cond_%s = %s;\n", |
7354 | parsed_flag_op_names[PFO_LE], buf1); |
7355 | pfomask &= ~(1 << PFO_LE); |
7356 | } |
2fe80fdb |
7357 | goto dualop_arith; |
7358 | |
7359 | case OP_SUB: |
7360 | assert_operand_cnt(2); |
7361 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
3b2f4044 |
7362 | if (pfomask & ~((1 << PFO_Z) | (1 << PFO_S))) { |
7363 | for (j = 0; j <= PFO_LE; j++) { |
7364 | if (!(pfomask & (1 << j))) |
7365 | continue; |
7366 | if (j == PFO_Z || j == PFO_S) |
7367 | continue; |
7368 | |
16057ce1 |
7369 | out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0, 0); |
3b2f4044 |
7370 | fprintf(fout, " cond_%s = %s;\n", |
7371 | parsed_flag_op_names[j], buf1); |
7372 | pfomask &= ~(1 << j); |
7373 | } |
2fe80fdb |
7374 | } |
7375 | goto dualop_arith; |
7376 | |
5101a5f9 |
7377 | case OP_ADC: |
850c9265 |
7378 | case OP_SBB: |
5101a5f9 |
7379 | assert_operand_cnt(2); |
7380 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
a2c1d768 |
7381 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
840257f6 |
7382 | if (po->op == OP_SBB |
7383 | && IS(po->operand[0].name, po->operand[1].name)) |
7384 | { |
7385 | // avoid use of unitialized var |
a2c1d768 |
7386 | fprintf(fout, " %s = -cond_c;", buf1); |
94d447fb |
7387 | // carry remains what it was |
7388 | pfomask &= ~(1 << PFO_C); |
840257f6 |
7389 | } |
7390 | else { |
a2c1d768 |
7391 | fprintf(fout, " %s %s= %s + cond_c;", buf1, op_to_c(po), |
3ebea2cf |
7392 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
840257f6 |
7393 | } |
a2c1d768 |
7394 | output_std_flags(fout, po, &pfomask, buf1); |
5101a5f9 |
7395 | last_arith_dst = &po->operand[0]; |
7396 | delayed_flag_op = NULL; |
850c9265 |
7397 | break; |
7398 | |
1f84f6b3 |
7399 | case OP_BSF: |
f9327ad4 |
7400 | case OP_BSR: |
7401 | // on SKL, if src is 0, dst is left unchanged |
1f84f6b3 |
7402 | assert_operand_cnt(2); |
f9327ad4 |
7403 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
1f84f6b3 |
7404 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
f9327ad4 |
7405 | output_std_flag_z(fout, po, &pfomask, buf2); |
7406 | if (po->op == OP_BSF) |
7407 | snprintf(buf3, sizeof(buf3), "__builtin_ffs(%s) - 1", buf2); |
7408 | else |
7409 | snprintf(buf3, sizeof(buf3), "31 - __builtin_clz(%s)", buf2); |
7410 | fprintf(fout, " if (%s) %s = %s;", buf2, buf1, buf3); |
1f84f6b3 |
7411 | last_arith_dst = &po->operand[0]; |
7412 | delayed_flag_op = NULL; |
f9327ad4 |
7413 | strcat(g_comment, po->op == OP_BSF ? " bsf" : " bsr"); |
1f84f6b3 |
7414 | break; |
7415 | |
850c9265 |
7416 | case OP_DEC: |
90307a99 |
7417 | if (pfomask & ~(PFOB_S | PFOB_S | PFOB_C)) { |
7418 | for (j = 0; j <= PFO_LE; j++) { |
7419 | if (!(pfomask & (1 << j))) |
7420 | continue; |
7421 | if (j == PFO_Z || j == PFO_S || j == PFO_C) |
7422 | continue; |
7423 | |
16057ce1 |
7424 | out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0, 0); |
90307a99 |
7425 | fprintf(fout, " cond_%s = %s;\n", |
7426 | parsed_flag_op_names[j], buf1); |
7427 | pfomask &= ~(1 << j); |
7428 | } |
7429 | } |
7430 | // fallthrough |
7431 | |
7432 | case OP_INC: |
7433 | if (pfomask & (1 << PFO_C)) |
7434 | // carry is unaffected by inc/dec.. wtf? |
7435 | ferr(po, "carry propagation needed\n"); |
7436 | |
850c9265 |
7437 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
1bafb621 |
7438 | if (po->operand[0].type == OPT_REG) { |
193c11bf |
7439 | ferr_assert(po, !(po->flags & OPF_LOCK)); |
1bafb621 |
7440 | strcpy(buf2, po->op == OP_INC ? "++" : "--"); |
7441 | fprintf(fout, " %s%s;", buf1, buf2); |
7442 | } |
193c11bf |
7443 | else if (po->flags & OPF_LOCK) { |
7444 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[0], "", 1); |
7445 | fprintf(fout, " __sync_fetch_and_%s((%s *)(%s), 1);", |
7446 | po->op == OP_INC ? "add" : "sub", |
7447 | lmod_type_u(po, po->operand[0].lmod), buf2); |
7448 | strcat(g_comment, " lock"); |
7449 | lock_handled = 1; |
7450 | } |
1bafb621 |
7451 | else { |
7452 | strcpy(buf2, po->op == OP_INC ? "+" : "-"); |
7453 | fprintf(fout, " %s %s= 1;", buf1, buf2); |
7454 | } |
a2c1d768 |
7455 | output_std_flags(fout, po, &pfomask, buf1); |
5101a5f9 |
7456 | last_arith_dst = &po->operand[0]; |
7457 | delayed_flag_op = NULL; |
7458 | break; |
7459 | |
7460 | case OP_NEG: |
7461 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
3ebea2cf |
7462 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]); |
5101a5f9 |
7463 | fprintf(fout, " %s = -%s%s;", buf1, |
7464 | lmod_cast_s(po, po->operand[0].lmod), buf2); |
850c9265 |
7465 | last_arith_dst = &po->operand[0]; |
69a3cdfc |
7466 | delayed_flag_op = NULL; |
0ea6430c |
7467 | if (pfomask & PFOB_C) { |
940e8e66 |
7468 | fprintf(fout, "\n cond_c = (%s != 0);", buf1); |
0ea6430c |
7469 | pfomask &= ~PFOB_C; |
940e8e66 |
7470 | } |
0ea6430c |
7471 | output_std_flags(fout, po, &pfomask, buf1); |
850c9265 |
7472 | break; |
7473 | |
7474 | case OP_IMUL: |
de50b98b |
7475 | if (po->operand_cnt == 2) { |
7476 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
850c9265 |
7477 | goto dualop_arith; |
de50b98b |
7478 | } |
87bf6cec |
7479 | if (po->operand_cnt == 3) |
7480 | ferr(po, "TODO imul3\n"); |
7481 | // fallthrough |
7482 | case OP_MUL: |
7483 | assert_operand_cnt(1); |
c8dbc5be |
7484 | switch (po->operand[0].lmod) { |
7485 | case OPLM_DWORD: |
7486 | strcpy(buf1, po->op == OP_IMUL ? "(s64)(s32)" : "(u64)"); |
7487 | fprintf(fout, " tmp64 = %seax * %s%s;\n", buf1, buf1, |
7488 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0])); |
7489 | fprintf(fout, " edx = tmp64 >> 32;\n"); |
7490 | fprintf(fout, " eax = tmp64;"); |
7491 | break; |
7492 | case OPLM_BYTE: |
7493 | strcpy(buf1, po->op == OP_IMUL ? "(s16)(s8)" : "(u16)(u8)"); |
7494 | fprintf(fout, " LOWORD(eax) = %seax * %s;", buf1, |
7495 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[0], |
7496 | buf1, 0)); |
7497 | break; |
7498 | default: |
7499 | ferr(po, "TODO: unhandled mul type\n"); |
7500 | break; |
7501 | } |
87bf6cec |
7502 | last_arith_dst = NULL; |
69a3cdfc |
7503 | delayed_flag_op = NULL; |
91977a1c |
7504 | break; |
7505 | |
5101a5f9 |
7506 | case OP_DIV: |
7507 | case OP_IDIV: |
7508 | assert_operand_cnt(1); |
cb090db0 |
7509 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
acd03176 |
7510 | strcpy(cast, lmod_cast(po, po->operand[0].lmod, |
cb090db0 |
7511 | po->op == OP_IDIV)); |
7512 | switch (po->operand[0].lmod) { |
7513 | case OPLM_DWORD: |
7514 | if (po->flags & OPF_32BIT) |
acd03176 |
7515 | snprintf(buf2, sizeof(buf2), "%seax", cast); |
cb090db0 |
7516 | else { |
7517 | fprintf(fout, " tmp64 = ((u64)edx << 32) | eax;\n"); |
acd03176 |
7518 | snprintf(buf2, sizeof(buf2), "%stmp64", |
cb090db0 |
7519 | (po->op == OP_IDIV) ? "(s64)" : ""); |
7520 | } |
7521 | if (po->operand[0].type == OPT_REG |
7522 | && po->operand[0].reg == xDX) |
7523 | { |
acd03176 |
7524 | fprintf(fout, " eax = %s / %s%s;\n", buf2, cast, buf1); |
7525 | fprintf(fout, " edx = %s %% %s%s;", buf2, cast, buf1); |
7526 | } |
7527 | else { |
7528 | fprintf(fout, " edx = %s %% %s%s;\n", buf2, cast, buf1); |
7529 | fprintf(fout, " eax = %s / %s%s;", buf2, cast, buf1); |
7530 | } |
7531 | break; |
7532 | case OPLM_WORD: |
7533 | fprintf(fout, " tmp = (edx << 16) | (eax & 0xffff);\n"); |
7534 | snprintf(buf2, sizeof(buf2), "%stmp", |
7535 | (po->op == OP_IDIV) ? "(s32)" : ""); |
7536 | if (po->operand[0].type == OPT_REG |
7537 | && po->operand[0].reg == xDX) |
7538 | { |
7539 | fprintf(fout, " LOWORD(eax) = %s / %s%s;\n", |
7540 | buf2, cast, buf1); |
7541 | fprintf(fout, " LOWORD(edx) = %s %% %s%s;", |
7542 | buf2, cast, buf1); |
cb090db0 |
7543 | } |
7544 | else { |
acd03176 |
7545 | fprintf(fout, " LOWORD(edx) = %s %% %s%s;\n", |
7546 | buf2, cast, buf1); |
7547 | fprintf(fout, " LOWORD(eax) = %s / %s%s;", |
7548 | buf2, cast, buf1); |
cb090db0 |
7549 | } |
d4a985bd |
7550 | strcat(g_comment, " div16"); |
cb090db0 |
7551 | break; |
7552 | default: |
acd03176 |
7553 | ferr(po, "unhandled div lmod %d\n", po->operand[0].lmod); |
5101a5f9 |
7554 | } |
87bf6cec |
7555 | last_arith_dst = NULL; |
7556 | delayed_flag_op = NULL; |
5101a5f9 |
7557 | break; |
7558 | |
91977a1c |
7559 | case OP_TEST: |
7560 | case OP_CMP: |
850c9265 |
7561 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
940e8e66 |
7562 | if (pfomask != 0) { |
69a3cdfc |
7563 | for (j = 0; j < 8; j++) { |
940e8e66 |
7564 | if (pfomask & (1 << j)) { |
69a3cdfc |
7565 | out_cmp_test(buf1, sizeof(buf1), po, j, 0); |
7566 | fprintf(fout, " cond_%s = %s;", |
7567 | parsed_flag_op_names[j], buf1); |
7568 | } |
7569 | } |
940e8e66 |
7570 | pfomask = 0; |
69a3cdfc |
7571 | } |
7572 | else |
7573 | no_output = 1; |
7ba45c34 |
7574 | last_arith_dst = NULL; |
69a3cdfc |
7575 | delayed_flag_op = po; |
91977a1c |
7576 | break; |
7577 | |
092f64e1 |
7578 | case OP_SCC: |
7579 | // SETcc - should already be handled |
7580 | break; |
7581 | |
69a3cdfc |
7582 | // note: we reuse OP_Jcc for SETcc, only flags differ |
092f64e1 |
7583 | case OP_JCC: |
7584 | fprintf(fout, "\n goto %s;", po->operand[0].name); |
850c9265 |
7585 | break; |
7586 | |
5c024ef7 |
7587 | case OP_JECXZ: |
7588 | fprintf(fout, " if (ecx == 0)\n"); |
7589 | fprintf(fout, " goto %s;", po->operand[0].name); |
d4a985bd |
7590 | strcat(g_comment, " jecxz"); |
5c024ef7 |
7591 | break; |
7592 | |
04abc5d6 |
7593 | case OP_LOOP: |
3947cf24 |
7594 | fprintf(fout, " if (--ecx != 0)\n"); |
04abc5d6 |
7595 | fprintf(fout, " goto %s;", po->operand[0].name); |
d4a985bd |
7596 | strcat(g_comment, " loop"); |
04abc5d6 |
7597 | break; |
7598 | |
850c9265 |
7599 | case OP_JMP: |
87bf6cec |
7600 | assert_operand_cnt(1); |
de50b98b |
7601 | last_arith_dst = NULL; |
7602 | delayed_flag_op = NULL; |
7603 | |
4c45fa73 |
7604 | if (po->operand[0].type == OPT_REGMEM) { |
7605 | ret = sscanf(po->operand[0].name, "%[^[][%[^*]*4]", |
7606 | buf1, buf2); |
7607 | if (ret != 2) |
7608 | ferr(po, "parse failure for jmp '%s'\n", |
7609 | po->operand[0].name); |
7610 | fprintf(fout, " goto *jt_%s[%s];", buf1, buf2); |
7611 | break; |
7612 | } |
7613 | else if (po->operand[0].type != OPT_LABEL) |
7614 | ferr(po, "unhandled jmp type\n"); |
87bf6cec |
7615 | |
850c9265 |
7616 | fprintf(fout, " goto %s;", po->operand[0].name); |
91977a1c |
7617 | break; |
7618 | |
7619 | case OP_CALL: |
5101a5f9 |
7620 | assert_operand_cnt(1); |
092f64e1 |
7621 | pp = po->pp; |
89ff3147 |
7622 | my_assert_not(pp, NULL); |
91977a1c |
7623 | |
092f64e1 |
7624 | strcpy(buf3, " "); |
7625 | if (po->flags & OPF_CC) { |
7626 | // we treat conditional branch to another func |
7627 | // (yes such code exists..) as conditional tailcall |
7628 | strcat(buf3, " "); |
7629 | fprintf(fout, " {\n"); |
7630 | } |
7631 | |
8eb12e72 |
7632 | if (pp->is_fptr && !pp->is_arg) { |
092f64e1 |
7633 | fprintf(fout, "%s%s = %s;\n", buf3, pp->name, |
1cd4a663 |
7634 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], |
7635 | "(void *)", 0)); |
1fe8d40e |
7636 | } |
7637 | if (pp->is_fptr && (pp->is_unresolved || pp->is_guessed)) { |
7638 | fprintf(fout, "%sunresolved_call(\"%s:%d\", %s);\n", |
7639 | buf3, asmfn, po->asmln, pp->name); |
8eb12e72 |
7640 | } |
1bafb621 |
7641 | |
092f64e1 |
7642 | fprintf(fout, "%s", buf3); |
2b43685d |
7643 | if (strstr(pp->ret_type.name, "int64")) { |
87bf6cec |
7644 | if (po->flags & OPF_TAIL) |
2b43685d |
7645 | ferr(po, "int64 and tail?\n"); |
2fe80fdb |
7646 | fprintf(fout, "tmp64 = "); |
2b43685d |
7647 | } |
7648 | else if (!IS(pp->ret_type.name, "void")) { |
7649 | if (po->flags & OPF_TAIL) { |
d4a985bd |
7650 | if (regmask_ret & mxAX) { |
840257f6 |
7651 | fprintf(fout, "return "); |
7652 | if (g_func_pp->ret_type.is_ptr != pp->ret_type.is_ptr) |
7653 | fprintf(fout, "(%s)", g_func_pp->ret_type.name); |
7654 | } |
d4a985bd |
7655 | else if (regmask_ret & mxST0) |
7656 | ferr(po, "float tailcall\n"); |
2b43685d |
7657 | } |
d4a985bd |
7658 | else if (po->regmask_dst & mxAX) { |
87bf6cec |
7659 | fprintf(fout, "eax = "); |
2b43685d |
7660 | if (pp->ret_type.is_ptr) |
7661 | fprintf(fout, "(u32)"); |
7662 | } |
d4a985bd |
7663 | else if (po->regmask_dst & mxST0) { |
fe18df39 |
7664 | ferr_assert(po, po->flags & OPF_FPUSH); |
7665 | if (need_float_stack) |
7666 | fprintf(fout, "f_st[--f_stp & 7] = "); |
7667 | else |
7668 | fprintf(fout, "f_st0 = "); |
d4a985bd |
7669 | } |
91977a1c |
7670 | } |
87bf6cec |
7671 | |
ddaf8bd7 |
7672 | if (pp->name[0] == 0) |
7673 | ferr(po, "missing pp->name\n"); |
7674 | fprintf(fout, "%s%s(", pp->name, |
7675 | pp->has_structarg ? "_sa" : ""); |
39b168b8 |
7676 | |
2fe80fdb |
7677 | if (po->flags & OPF_ATAIL) { |
56b49358 |
7678 | int check_compat = |
7679 | g_func_pp->is_stdcall && g_func_pp->argc_stack > 0; |
7680 | check_compat |= pp->argc_stack > 0; |
7681 | if (check_compat |
7682 | && (pp->argc_stack != g_func_pp->argc_stack |
7683 | || pp->is_stdcall != g_func_pp->is_stdcall)) |
7684 | ferr(po, "incompatible arg-reuse tailcall\n"); |
1f84f6b3 |
7685 | if (g_func_pp->has_retreg) |
7686 | ferr(po, "TODO: retreg+tailcall\n"); |
87bf6cec |
7687 | |
2fe80fdb |
7688 | for (arg = j = 0; arg < pp->argc; arg++) { |
7689 | if (arg > 0) |
7690 | fprintf(fout, ", "); |
87bf6cec |
7691 | |
2fe80fdb |
7692 | cast[0] = 0; |
7693 | if (pp->arg[arg].type.is_ptr) |
7694 | snprintf(cast, sizeof(cast), "(%s)", |
7695 | pp->arg[arg].type.name); |
91977a1c |
7696 | |
2fe80fdb |
7697 | if (pp->arg[arg].reg != NULL) { |
7698 | fprintf(fout, "%s%s", cast, pp->arg[arg].reg); |
7699 | continue; |
7700 | } |
7701 | // stack arg |
7702 | for (; j < g_func_pp->argc; j++) |
7703 | if (g_func_pp->arg[j].reg == NULL) |
7704 | break; |
7705 | fprintf(fout, "%sa%d", cast, j + 1); |
7706 | j++; |
69a3cdfc |
7707 | } |
2fe80fdb |
7708 | } |
7709 | else { |
7710 | for (arg = 0; arg < pp->argc; arg++) { |
7711 | if (arg > 0) |
7712 | fprintf(fout, ", "); |
7713 | |
7714 | cast[0] = 0; |
7715 | if (pp->arg[arg].type.is_ptr) |
7716 | snprintf(cast, sizeof(cast), "(%s)", |
7717 | pp->arg[arg].type.name); |
7718 | |
7719 | if (pp->arg[arg].reg != NULL) { |
1f84f6b3 |
7720 | if (pp->arg[arg].type.is_retreg) |
7721 | fprintf(fout, "&%s", pp->arg[arg].reg); |
8c83cc48 |
7722 | else if (IS(pp->arg[arg].reg, "ebp") |
e627c4d0 |
7723 | && g_bp_frame && !(po->flags & OPF_EBP_S)) |
8c83cc48 |
7724 | { |
7725 | // rare special case |
7726 | fprintf(fout, "%s(u32)&sf.b[sizeof(sf)]", cast); |
7727 | strcat(g_comment, " bp_ref"); |
7728 | } |
1f84f6b3 |
7729 | else |
7730 | fprintf(fout, "%s%s", cast, pp->arg[arg].reg); |
2fe80fdb |
7731 | continue; |
7732 | } |
7733 | |
7734 | // stack arg |
7735 | tmp_op = pp->arg[arg].datap; |
7736 | if (tmp_op == NULL) |
7737 | ferr(po, "parsed_op missing for arg%d\n", arg); |
23fd0b11 |
7738 | |
7739 | if (tmp_op->flags & OPF_VAPUSH) { |
7740 | fprintf(fout, "ap"); |
7741 | } |
30620174 |
7742 | else if (tmp_op->op == OP_FST) { |
7743 | fprintf(fout, "fs_%d", tmp_op->p_argnum); |
7744 | if (tmp_op->operand[0].lmod == OPLM_QWORD) |
7745 | arg++; |
7746 | } |
57860365 |
7747 | else if (pp->arg[arg].type.is_64bit) { |
7748 | ferr_assert(po, tmp_op->p_argpass == 0); |
7749 | ferr_assert(po, !pp->arg[arg].is_saved); |
b62264bc |
7750 | ferr_assert(po, !pp->arg[arg].type.is_float); |
57860365 |
7751 | ferr_assert(po, cast[0] == 0); |
7752 | out_src_opr(buf1, sizeof(buf1), |
7753 | tmp_op, &tmp_op->operand[0], cast, 0); |
7754 | tmp_op = pp->arg[++arg].datap; |
7755 | ferr_assert(po, tmp_op != NULL); |
7756 | out_src_opr(buf2, sizeof(buf2), |
7757 | tmp_op, &tmp_op->operand[0], cast, 0); |
7758 | fprintf(fout, "((u64)(%s) << 32) | (%s)", |
7759 | buf2, buf1); |
7760 | } |
5f70a34f |
7761 | else if (tmp_op->p_argpass != 0) { |
b62264bc |
7762 | ferr_assert(po, !pp->arg[arg].type.is_float); |
5f70a34f |
7763 | fprintf(fout, "a%d", tmp_op->p_argpass); |
7764 | } |
8c83cc48 |
7765 | else if (pp->arg[arg].is_saved) { |
7766 | ferr_assert(po, tmp_op->p_argnum > 0); |
b62264bc |
7767 | ferr_assert(po, !pp->arg[arg].type.is_float); |
3a5101d7 |
7768 | fprintf(fout, "%s%s", cast, |
7769 | saved_arg_name(buf1, sizeof(buf1), |
7770 | tmp_op->p_arggrp, tmp_op->p_argnum)); |
2fe80fdb |
7771 | } |
b62264bc |
7772 | else if (pp->arg[arg].type.is_float) { |
7773 | ferr_assert(po, !pp->arg[arg].type.is_64bit); |
7774 | fprintf(fout, "%s", |
7775 | out_src_opr_float(buf1, sizeof(buf1), |
7776 | tmp_op, &tmp_op->operand[0], need_float_stack)); |
7777 | } |
2fe80fdb |
7778 | else { |
7779 | fprintf(fout, "%s", |
7780 | out_src_opr(buf1, sizeof(buf1), |
7781 | tmp_op, &tmp_op->operand[0], cast, 0)); |
7782 | } |
69a3cdfc |
7783 | } |
91977a1c |
7784 | } |
7785 | fprintf(fout, ");"); |
87bf6cec |
7786 | |
2b43685d |
7787 | if (strstr(pp->ret_type.name, "int64")) { |
7788 | fprintf(fout, "\n"); |
092f64e1 |
7789 | fprintf(fout, "%sedx = tmp64 >> 32;\n", buf3); |
7790 | fprintf(fout, "%seax = tmp64;", buf3); |
2b43685d |
7791 | } |
7792 | |
89ff3147 |
7793 | if (pp->is_unresolved) { |
8eb12e72 |
7794 | snprintf(buf2, sizeof(buf2), " unresolved %dreg", |
89ff3147 |
7795 | pp->argc_reg); |
092f64e1 |
7796 | strcat(g_comment, buf2); |
89ff3147 |
7797 | } |
7798 | |
87bf6cec |
7799 | if (po->flags & OPF_TAIL) { |
840257f6 |
7800 | ret = 0; |
ddaf8bd7 |
7801 | if (i == opcnt - 1 || pp->is_noreturn) |
840257f6 |
7802 | ret = 0; |
7803 | else if (IS(pp->ret_type.name, "void")) |
7804 | ret = 1; |
b2bd20c0 |
7805 | else if (!(regmask_ret & (1 << xAX))) |
840257f6 |
7806 | ret = 1; |
7807 | // else already handled as 'return f()' |
7808 | |
7809 | if (ret) { |
acd03176 |
7810 | fprintf(fout, "\n%sreturn;", buf3); |
7811 | strcat(g_comment, " ^ tailcall"); |
3ebea2cf |
7812 | } |
89ff3147 |
7813 | else |
ddaf8bd7 |
7814 | strcat(g_comment, " tailcall"); |
acd03176 |
7815 | |
7816 | if ((regmask_ret & (1 << xAX)) |
7817 | && IS(pp->ret_type.name, "void") && !pp->is_noreturn) |
7818 | { |
7819 | ferr(po, "int func -> void func tailcall?\n"); |
7820 | } |
87bf6cec |
7821 | } |
ddaf8bd7 |
7822 | if (pp->is_noreturn) |
7823 | strcat(g_comment, " noreturn"); |
2fe80fdb |
7824 | if ((po->flags & OPF_ATAIL) && pp->argc_stack > 0) |
7825 | strcat(g_comment, " argframe"); |
092f64e1 |
7826 | if (po->flags & OPF_CC) |
7827 | strcat(g_comment, " cond"); |
7828 | |
7829 | if (po->flags & OPF_CC) |
7830 | fprintf(fout, "\n }"); |
7831 | |
87bf6cec |
7832 | delayed_flag_op = NULL; |
7833 | last_arith_dst = NULL; |
91977a1c |
7834 | break; |
7835 | |
7836 | case OP_RET: |
bd96f656 |
7837 | if (g_func_pp->is_vararg) |
4f12f671 |
7838 | fprintf(fout, " va_end(ap);\n"); |
1f84f6b3 |
7839 | if (g_func_pp->has_retreg) { |
7840 | for (arg = 0; arg < g_func_pp->argc; arg++) |
7841 | if (g_func_pp->arg[arg].type.is_retreg) |
7842 | fprintf(fout, " *r_%s = %s;\n", |
7843 | g_func_pp->arg[arg].reg, g_func_pp->arg[arg].reg); |
7844 | } |
4f12f671 |
7845 | |
16057ce1 |
7846 | if (regmask_ret & mxST0) { |
7847 | fprintf(fout, " return %s;", float_st0); |
7848 | } |
7849 | else if (!(regmask_ret & mxAX)) { |
3ebea2cf |
7850 | if (i != opcnt - 1 || label_pending) |
7851 | fprintf(fout, " return;"); |
7852 | } |
bd96f656 |
7853 | else if (g_func_pp->ret_type.is_ptr) { |
d4e3b5db |
7854 | fprintf(fout, " return (%s)eax;", |
bd96f656 |
7855 | g_func_pp->ret_type.name); |
3ebea2cf |
7856 | } |
2fe80fdb |
7857 | else if (IS(g_func_pp->ret_type.name, "__int64")) |
7858 | fprintf(fout, " return ((u64)edx << 32) | eax;"); |
91977a1c |
7859 | else |
7860 | fprintf(fout, " return eax;"); |
de50b98b |
7861 | |
7862 | last_arith_dst = NULL; |
7863 | delayed_flag_op = NULL; |
91977a1c |
7864 | break; |
7865 | |
7866 | case OP_PUSH: |
1f84f6b3 |
7867 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
5f70a34f |
7868 | if (po->p_argnum != 0) { |
69a3cdfc |
7869 | // special case - saved func arg |
3a5101d7 |
7870 | fprintf(fout, " %s = %s;", |
7871 | saved_arg_name(buf2, sizeof(buf2), |
7872 | po->p_arggrp, po->p_argnum), buf1); |
69a3cdfc |
7873 | break; |
7874 | } |
d4e3b5db |
7875 | else if (po->flags & OPF_RSAVE) { |
d4e3b5db |
7876 | fprintf(fout, " s_%s = %s;", buf1, buf1); |
7877 | break; |
7878 | } |
25a330eb |
7879 | else if (po->flags & OPF_PPUSH) { |
7880 | tmp_op = po->datap; |
7881 | ferr_assert(po, tmp_op != NULL); |
7882 | out_dst_opr(buf2, sizeof(buf2), po, &tmp_op->operand[0]); |
7883 | fprintf(fout, " pp_%s = %s;", buf2, buf1); |
7884 | break; |
7885 | } |
1f84f6b3 |
7886 | else if (g_func_pp->is_userstack) { |
7887 | fprintf(fout, " *(--esp) = %s;", buf1); |
7888 | break; |
7889 | } |
e56ab892 |
7890 | if (!(g_ida_func_attr & IDAFA_NORETURN)) |
7891 | ferr(po, "stray push encountered\n"); |
7892 | no_output = 1; |
91977a1c |
7893 | break; |
7894 | |
7895 | case OP_POP: |
25a330eb |
7896 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
d4e3b5db |
7897 | if (po->flags & OPF_RSAVE) { |
d4e3b5db |
7898 | fprintf(fout, " %s = s_%s;", buf1, buf1); |
7899 | break; |
7900 | } |
25a330eb |
7901 | else if (po->flags & OPF_PPUSH) { |
e83ea7ed |
7902 | // push/pop graph / non-const |
25a330eb |
7903 | ferr_assert(po, po->datap == NULL); |
7904 | fprintf(fout, " %s = pp_%s;", buf1, buf1); |
7905 | break; |
7906 | } |
5c024ef7 |
7907 | else if (po->datap != NULL) { |
7908 | // push/pop pair |
7909 | tmp_op = po->datap; |
5c024ef7 |
7910 | fprintf(fout, " %s = %s;", buf1, |
7911 | out_src_opr(buf2, sizeof(buf2), |
7912 | tmp_op, &tmp_op->operand[0], |
c7ed83dd |
7913 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0)); |
5c024ef7 |
7914 | break; |
7915 | } |
1f84f6b3 |
7916 | else if (g_func_pp->is_userstack) { |
25a330eb |
7917 | fprintf(fout, " %s = *esp++;", buf1); |
1f84f6b3 |
7918 | break; |
7919 | } |
7920 | else |
7921 | ferr(po, "stray pop encountered\n"); |
91977a1c |
7922 | break; |
7923 | |
33c35af6 |
7924 | case OP_NOP: |
2b43685d |
7925 | no_output = 1; |
33c35af6 |
7926 | break; |
7927 | |
622eb2ef |
7928 | // pseudo ops |
7929 | case OPP_ALLSHL: |
7930 | case OPP_ALLSHR: |
7931 | fprintf(fout, " tmp64 = ((u64)edx << 32) | eax;\n"); |
8c83cc48 |
7932 | fprintf(fout, " tmp64 = (s64)tmp64 %s LOBYTE(ecx);\n", |
622eb2ef |
7933 | po->op == OPP_ALLSHL ? "<<" : ">>"); |
7934 | fprintf(fout, " edx = tmp64 >> 32; eax = tmp64;"); |
7935 | strcat(g_comment, po->op == OPP_ALLSHL |
7936 | ? " allshl" : " allshr"); |
7937 | break; |
7938 | |
d4a985bd |
7939 | // x87 |
7940 | case OP_FLD: |
fe18df39 |
7941 | if (need_float_stack) { |
7942 | out_src_opr_float(buf1, sizeof(buf1), |
7943 | po, &po->operand[0], 1); |
7944 | if (po->regmask_src & mxSTa) { |
7945 | fprintf(fout, " f_st[(f_stp - 1) & 7] = %s; f_stp--;", |
7946 | buf1); |
7947 | } |
7948 | else |
7949 | fprintf(fout, " f_st[--f_stp & 7] = %s;", buf1); |
7950 | } |
7951 | else { |
7952 | if (po->flags & OPF_FSHIFT) |
7953 | fprintf(fout, " f_st1 = f_st0;"); |
7954 | if (po->operand[0].type == OPT_REG |
7955 | && po->operand[0].reg == xST0) |
7956 | { |
7957 | strcat(g_comment, " fld st"); |
7958 | break; |
7959 | } |
7960 | fprintf(fout, " f_st0 = %s;", |
7961 | out_src_opr_float(buf1, sizeof(buf1), |
7962 | po, &po->operand[0], 0)); |
d4a985bd |
7963 | } |
d4a985bd |
7964 | strcat(g_comment, " fld"); |
7965 | break; |
7966 | |
7967 | case OP_FILD: |
fe18df39 |
7968 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], |
7969 | lmod_cast(po, po->operand[0].lmod, 1), 0); |
7970 | snprintf(buf2, sizeof(buf2), "(%s)%s", float_type, buf1); |
7971 | if (need_float_stack) { |
7972 | fprintf(fout, " f_st[--f_stp & 7] = %s;", buf2); |
7973 | } |
7974 | else { |
7975 | if (po->flags & OPF_FSHIFT) |
7976 | fprintf(fout, " f_st1 = f_st0;"); |
7977 | fprintf(fout, " f_st0 = %s;", buf2); |
7978 | } |
d4a985bd |
7979 | strcat(g_comment, " fild"); |
7980 | break; |
7981 | |
7982 | case OP_FLDc: |
fe18df39 |
7983 | if (need_float_stack) |
7984 | fprintf(fout, " f_st[--f_stp & 7] = "); |
7985 | else { |
7986 | if (po->flags & OPF_FSHIFT) |
7987 | fprintf(fout, " f_st1 = f_st0;"); |
7988 | fprintf(fout, " f_st0 = "); |
7989 | } |
d4a985bd |
7990 | switch (po->operand[0].val) { |
fe18df39 |
7991 | case X87_CONST_1: fprintf(fout, "1.0;"); break; |
b62264bc |
7992 | case X87_CONST_L2T: fprintf(fout, "3.321928094887362;"); break; |
7993 | case X87_CONST_L2E: fprintf(fout, "M_LOG2E;"); break; |
7994 | case X87_CONST_PI: fprintf(fout, "M_PI;"); break; |
7995 | case X87_CONST_LG2: fprintf(fout, "0.301029995663981;"); break; |
7996 | case X87_CONST_LN2: fprintf(fout, "M_LN2;"); break; |
fe18df39 |
7997 | case X87_CONST_Z: fprintf(fout, "0.0;"); break; |
b62264bc |
7998 | default: ferr_assert(po, 0); break; |
d4a985bd |
7999 | } |
8000 | break; |
8001 | |
8002 | case OP_FST: |
30620174 |
8003 | if (po->flags & OPF_FARG) { |
8004 | // store to stack as func arg |
8005 | snprintf(buf1, sizeof(buf1), "fs_%d", po->p_argnum); |
8006 | dead_dst = 0; |
8007 | } |
8008 | else { |
8009 | out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0], |
8010 | need_float_stack); |
8011 | dead_dst = po->operand[0].type == OPT_REG |
8012 | && po->operand[0].reg == xST0; |
fe18df39 |
8013 | } |
30620174 |
8014 | if (!dead_dst) |
8015 | fprintf(fout, " %s = %s;", buf1, float_st0); |
16057ce1 |
8016 | if (po->flags & OPF_FSHIFT) { |
8017 | if (need_float_stack) |
8018 | fprintf(fout, " f_stp++;"); |
8019 | else |
fe18df39 |
8020 | fprintf(fout, " f_st0 = f_st1;"); |
d4a985bd |
8021 | } |
fe18df39 |
8022 | if (dead_dst && !(po->flags & OPF_FSHIFT)) |
8023 | no_output = 1; |
8024 | else |
8025 | strcat(g_comment, " fst"); |
d4a985bd |
8026 | break; |
8027 | |
16057ce1 |
8028 | case OP_FIST: |
8029 | fprintf(fout, " %s = %s%s;", |
8030 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
8031 | lmod_cast(po, po->operand[0].lmod, 1), float_st0); |
8032 | if (po->flags & OPF_FSHIFT) { |
8033 | if (need_float_stack) |
8034 | fprintf(fout, " f_stp++;"); |
8035 | else |
8036 | fprintf(fout, " f_st0 = f_st1;"); |
8037 | } |
8038 | strcat(g_comment, " fist"); |
8039 | break; |
8040 | |
d4a985bd |
8041 | case OP_FADD: |
8042 | case OP_FDIV: |
8043 | case OP_FMUL: |
8044 | case OP_FSUB: |
fe18df39 |
8045 | out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0], |
8046 | need_float_stack); |
8047 | out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1], |
8048 | need_float_stack); |
8049 | dead_dst = (po->flags & OPF_FPOP) |
8050 | && po->operand[0].type == OPT_REG |
8051 | && po->operand[0].reg == xST0; |
d4a985bd |
8052 | switch (po->op) { |
8053 | case OP_FADD: j = '+'; break; |
8054 | case OP_FDIV: j = '/'; break; |
8055 | case OP_FMUL: j = '*'; break; |
8056 | case OP_FSUB: j = '-'; break; |
8057 | default: j = 'x'; break; |
8058 | } |
fe18df39 |
8059 | if (need_float_stack) { |
8060 | if (!dead_dst) |
8061 | fprintf(fout, " %s %c= %s;", buf1, j, buf2); |
8062 | if (po->flags & OPF_FSHIFT) |
8063 | fprintf(fout, " f_stp++;"); |
d4a985bd |
8064 | } |
8065 | else { |
fe18df39 |
8066 | if (po->flags & OPF_FSHIFT) { |
8067 | // note: assumes only 2 regs handled |
8068 | if (!dead_dst) |
8069 | fprintf(fout, " f_st0 = f_st1 %c f_st0;", j); |
8070 | else |
8071 | fprintf(fout, " f_st0 = f_st1;"); |
8072 | } |
8073 | else if (!dead_dst) |
8074 | fprintf(fout, " %s %c= %s;", buf1, j, buf2); |
d4a985bd |
8075 | } |
fe18df39 |
8076 | no_output = (dead_dst && !(po->flags & OPF_FSHIFT)); |
d4a985bd |
8077 | break; |
8078 | |
8079 | case OP_FDIVR: |
8080 | case OP_FSUBR: |
fe18df39 |
8081 | out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0], |
8082 | need_float_stack); |
8083 | out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1], |
8084 | need_float_stack); |
8085 | out_src_opr_float(buf3, sizeof(buf3), po, &po->operand[0], |
8086 | need_float_stack); |
8087 | dead_dst = (po->flags & OPF_FPOP) |
8088 | && po->operand[0].type == OPT_REG |
8089 | && po->operand[0].reg == xST0; |
8090 | j = po->op == OP_FDIVR ? '/' : '-'; |
8091 | if (need_float_stack) { |
8092 | if (!dead_dst) |
8093 | fprintf(fout, " %s = %s %c %s;", buf1, buf2, j, buf3); |
8094 | if (po->flags & OPF_FSHIFT) |
8095 | fprintf(fout, " f_stp++;"); |
8096 | } |
8097 | else { |
8098 | if (po->flags & OPF_FSHIFT) { |
8099 | if (!dead_dst) |
8100 | fprintf(fout, " f_st0 = f_st0 %c f_st1;", j); |
8101 | else |
8102 | fprintf(fout, " f_st0 = f_st1;"); |
8103 | } |
8104 | else if (!dead_dst) |
8105 | fprintf(fout, " %s = %s %c %s;", buf1, buf2, j, buf3); |
8106 | } |
8107 | no_output = (dead_dst && !(po->flags & OPF_FSHIFT)); |
d4a985bd |
8108 | break; |
8109 | |
8110 | case OP_FIADD: |
8111 | case OP_FIDIV: |
8112 | case OP_FIMUL: |
8113 | case OP_FISUB: |
8114 | switch (po->op) { |
8115 | case OP_FIADD: j = '+'; break; |
8116 | case OP_FIDIV: j = '/'; break; |
8117 | case OP_FIMUL: j = '*'; break; |
8118 | case OP_FISUB: j = '-'; break; |
8119 | default: j = 'x'; break; |
8120 | } |
fe18df39 |
8121 | fprintf(fout, " %s %c= (%s)%s;", float_st0, |
8122 | j, float_type, |
d4a985bd |
8123 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], |
8124 | lmod_cast(po, po->operand[0].lmod, 1), 0)); |
8125 | break; |
8126 | |
8127 | case OP_FIDIVR: |
8128 | case OP_FISUBR: |
fe18df39 |
8129 | fprintf(fout, " %s = %s %c %s;", float_st0, |
8130 | out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1], |
8131 | need_float_stack), |
8132 | po->op == OP_FIDIVR ? '/' : '-', float_st0); |
8133 | break; |
8134 | |
16057ce1 |
8135 | case OP_FCOM: { |
8136 | int mask, z_check; |
8137 | ferr_assert(po, po->datap != NULL); |
8138 | mask = (long)po->datap & 0xffff; |
8139 | z_check = ((long)po->datap >> 16) & 1; |
8140 | out_src_opr_float(buf1, sizeof(buf1), po, &po->operand[0], |
8141 | need_float_stack); |
2c31fb4c |
8142 | if (mask == 0x0100 || mask == 0x0500) { // C0 -> < |
16057ce1 |
8143 | fprintf(fout, " f_sw = %s < %s ? 0x0100 : 0;", |
8144 | float_st0, buf1); |
8145 | } |
88eed95d |
8146 | else if (mask == 0x4000 || mask == 0x4400) { // C3 -> = |
16057ce1 |
8147 | fprintf(fout, " f_sw = %s == %s ? 0x4000 : 0;", |
8148 | float_st0, buf1); |
8149 | } |
8150 | else if (mask == 0x4100) { // C3, C0 |
8151 | if (z_check) { |
8152 | fprintf(fout, " f_sw = %s <= %s ? 0x4100 : 0;", |
8153 | float_st0, buf1); |
8154 | strcat(g_comment, " z_chk_det"); |
8155 | } |
8156 | else { |
8157 | fprintf(fout, " f_sw = %s == %s ? 0x4000 : " |
8158 | "(%s < %s ? 0x0100 : 0);", |
8159 | float_st0, buf1, float_st0, buf1); |
8160 | } |
8161 | } |
8162 | else |
8163 | ferr(po, "unhandled sw mask: %x\n", mask); |
8164 | if (po->flags & OPF_FSHIFT) { |
88eed95d |
8165 | if (need_float_stack) { |
8166 | if (po->flags & OPF_FPOPP) |
8167 | fprintf(fout, " f_stp += 2;"); |
8168 | else |
8169 | fprintf(fout, " f_stp++;"); |
8170 | } |
8171 | else { |
8172 | ferr_assert(po, !(po->flags & OPF_FPOPP)); |
16057ce1 |
8173 | fprintf(fout, " f_st0 = f_st1;"); |
88eed95d |
8174 | } |
16057ce1 |
8175 | } |
8176 | break; |
8177 | } |
8178 | |
8179 | case OP_FNSTSW: |
8180 | fprintf(fout, " %s = f_sw;", |
8181 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
8182 | break; |
8183 | |
fe18df39 |
8184 | case OP_FCHS: |
8185 | fprintf(fout, " %s = -%s;", float_st0, float_st0); |
d4a985bd |
8186 | break; |
8187 | |
497a6d6b |
8188 | case OP_FCOS: |
fe18df39 |
8189 | fprintf(fout, " %s = cos%s(%s);", float_st0, |
8190 | need_double ? "" : "f", float_st0); |
497a6d6b |
8191 | break; |
8192 | |
8193 | case OP_FPATAN: |
fe18df39 |
8194 | if (need_float_stack) { |
8195 | fprintf(fout, " %s = atan%s(%s / %s);", float_st1, |
8196 | need_double ? "" : "f", float_st1, float_st0); |
8197 | fprintf(fout, " f_stp++;"); |
8198 | } |
8199 | else { |
8200 | fprintf(fout, " f_st0 = atan%s(f_st1 / f_st0);", |
8201 | need_double ? "" : "f"); |
8202 | } |
8203 | break; |
8204 | |
8205 | case OP_FYL2X: |
8206 | if (need_float_stack) { |
8207 | fprintf(fout, " %s = %s * log2%s(%s);", float_st1, |
8208 | float_st1, need_double ? "" : "f", float_st0); |
8209 | fprintf(fout, " f_stp++;"); |
8210 | } |
8211 | else { |
8212 | fprintf(fout, " f_st0 = f_st1 * log2%s(f_st0);", |
8213 | need_double ? "" : "f"); |
8214 | } |
8c83cc48 |
8215 | strcat(g_comment, " fyl2x"); |
497a6d6b |
8216 | break; |
8217 | |
8218 | case OP_FSIN: |
fe18df39 |
8219 | fprintf(fout, " %s = sin%s(%s);", float_st0, |
8220 | need_double ? "" : "f", float_st0); |
497a6d6b |
8221 | break; |
8222 | |
8223 | case OP_FSQRT: |
fe18df39 |
8224 | fprintf(fout, " %s = sqrt%s(%s);", float_st0, |
8225 | need_double ? "" : "f", float_st0); |
8226 | break; |
8227 | |
8228 | case OP_FXCH: |
8229 | dead_dst = po->operand[0].type == OPT_REG |
8230 | && po->operand[0].reg == xST0; |
8231 | if (!dead_dst) { |
8232 | out_src_opr_float(buf1, sizeof(buf1), po, &po->operand[0], |
8233 | need_float_stack); |
8234 | fprintf(fout, " { %s t = %s; %s = %s; %s = t; }", float_type, |
8235 | float_st0, float_st0, buf1, buf1); |
8236 | strcat(g_comment, " fxch"); |
8237 | } |
8238 | else |
8239 | no_output = 1; |
497a6d6b |
8240 | break; |
8241 | |
d4a985bd |
8242 | case OPP_FTOL: |
8243 | ferr_assert(po, po->flags & OPF_32BIT); |
fe18df39 |
8244 | fprintf(fout, " eax = (s32)%s;", float_st0); |
8245 | if (po->flags & OPF_FSHIFT) { |
8246 | if (need_float_stack) |
8247 | fprintf(fout, " f_stp++;"); |
8248 | else |
8249 | fprintf(fout, " f_st0 = f_st1;"); |
8250 | } |
d4a985bd |
8251 | strcat(g_comment, " ftol"); |
8252 | break; |
8253 | |
8c83cc48 |
8254 | case OPP_CIPOW: |
8255 | if (need_float_stack) { |
8256 | fprintf(fout, " %s = pow%s(%s, %s);", float_st1, |
8257 | need_double ? "" : "f", float_st1, float_st0); |
8258 | fprintf(fout, " f_stp++;"); |
8259 | } |
8260 | else { |
8261 | fprintf(fout, " f_st0 = pow%s(f_st1, f_st0);", |
8262 | need_double ? "" : "f"); |
8263 | } |
8264 | strcat(g_comment, " CIpow"); |
8265 | break; |
8266 | |
11437ea1 |
8267 | case OPP_ABORT: |
8268 | fprintf(fout, " do_skip_code_abort();"); |
8269 | break; |
8270 | |
90307a99 |
8271 | // mmx |
8272 | case OP_EMMS: |
11437ea1 |
8273 | fprintf(fout, " do_emms();"); |
90307a99 |
8274 | break; |
8275 | |
91977a1c |
8276 | default: |
8277 | no_output = 1; |
69a3cdfc |
8278 | ferr(po, "unhandled op type %d, flags %x\n", |
8279 | po->op, po->flags); |
91977a1c |
8280 | break; |
8281 | } |
8282 | |
8283 | if (g_comment[0] != 0) { |
ddaf8bd7 |
8284 | char *p = g_comment; |
8285 | while (my_isblank(*p)) |
8286 | p++; |
8287 | fprintf(fout, " // %s", p); |
91977a1c |
8288 | g_comment[0] = 0; |
8289 | no_output = 0; |
8290 | } |
8291 | if (!no_output) |
8292 | fprintf(fout, "\n"); |
5101a5f9 |
8293 | |
2b43685d |
8294 | // some sanity checking |
591721d7 |
8295 | if (po->flags & OPF_REP) { |
8296 | if (po->op != OP_STOS && po->op != OP_MOVS |
8297 | && po->op != OP_CMPS && po->op != OP_SCAS) |
8298 | ferr(po, "unexpected rep\n"); |
8299 | if (!(po->flags & (OPF_REPZ|OPF_REPNZ)) |
8300 | && (po->op == OP_CMPS || po->op == OP_SCAS)) |
8301 | ferr(po, "cmps/scas with plain rep\n"); |
8302 | } |
8303 | if ((po->flags & (OPF_REPZ|OPF_REPNZ)) |
8304 | && po->op != OP_CMPS && po->op != OP_SCAS) |
2b43685d |
8305 | ferr(po, "unexpected repz/repnz\n"); |
8306 | |
940e8e66 |
8307 | if (pfomask != 0) |
7ba45c34 |
8308 | ferr(po, "missed flag calc, pfomask=%x\n", pfomask); |
940e8e66 |
8309 | |
193c11bf |
8310 | if ((po->flags & OPF_LOCK) && !lock_handled) |
8311 | ferr(po, "unhandled lock\n"); |
8312 | |
5101a5f9 |
8313 | // see is delayed flag stuff is still valid |
8314 | if (delayed_flag_op != NULL && delayed_flag_op != po) { |
89ff3147 |
8315 | if (is_any_opr_modified(delayed_flag_op, po, 0)) |
5101a5f9 |
8316 | delayed_flag_op = NULL; |
8317 | } |
8318 | |
8319 | if (last_arith_dst != NULL && last_arith_dst != &po->operand[0]) { |
8320 | if (is_opr_modified(last_arith_dst, po)) |
8321 | last_arith_dst = NULL; |
8322 | } |
3ebea2cf |
8323 | |
2c31fb4c |
8324 | if (!no_output) |
8325 | label_pending = 0; |
91977a1c |
8326 | } |
8327 | |
a2c1d768 |
8328 | if (g_stack_fsz && !g_stack_frame_used) |
8329 | fprintf(fout, " (void)sf;\n"); |
8330 | |
91977a1c |
8331 | fprintf(fout, "}\n\n"); |
8332 | |
9af2d373 |
8333 | gen_x_cleanup(opcnt); |
8334 | } |
8335 | |
8336 | static void gen_x_cleanup(int opcnt) |
8337 | { |
8338 | int i; |
8339 | |
91977a1c |
8340 | for (i = 0; i < opcnt; i++) { |
4c45fa73 |
8341 | struct label_ref *lr, *lr_del; |
8342 | |
8343 | lr = g_label_refs[i].next; |
8344 | while (lr != NULL) { |
8345 | lr_del = lr; |
8346 | lr = lr->next; |
8347 | free(lr_del); |
8348 | } |
8349 | g_label_refs[i].i = -1; |
8350 | g_label_refs[i].next = NULL; |
8351 | |
91977a1c |
8352 | if (ops[i].op == OP_CALL) { |
092f64e1 |
8353 | if (ops[i].pp) |
8354 | proto_release(ops[i].pp); |
91977a1c |
8355 | } |
8356 | } |
bd96f656 |
8357 | g_func_pp = NULL; |
91977a1c |
8358 | } |
c36e914d |
8359 | |
92d715b6 |
8360 | struct func_proto_dep; |
8361 | |
8362 | struct func_prototype { |
8363 | char name[NAMELEN]; |
8364 | int id; |
8365 | int argc_stack; |
427da1c9 |
8366 | int regmask_dep; // likely register args |
8367 | int regmask_use; // used registers |
91ca764a |
8368 | int has_ret:3; // -1, 0, 1: unresolved, no, yes |
427da1c9 |
8369 | unsigned int has_ret64:1; |
92d715b6 |
8370 | unsigned int dep_resolved:1; |
8371 | unsigned int is_stdcall:1; |
087ced53 |
8372 | unsigned int eax_pass:1; // returns without touching eax |
615dbae1 |
8373 | unsigned int ptr_taken:1; // pointer taken of this func |
92d715b6 |
8374 | struct func_proto_dep *dep_func; |
8375 | int dep_func_cnt; |
91ca764a |
8376 | const struct parsed_proto *pp; // seed pp, if any |
92d715b6 |
8377 | }; |
8378 | |
8379 | struct func_proto_dep { |
8380 | char *name; |
8381 | struct func_prototype *proto; |
8382 | int regmask_live; // .. at the time of call |
8383 | unsigned int ret_dep:1; // return from this is caller's return |
427da1c9 |
8384 | unsigned int has_ret:1; // found from eax use after return |
8385 | unsigned int has_ret64:1; |
615dbae1 |
8386 | unsigned int ptr_taken:1; // pointer taken, not a call |
92d715b6 |
8387 | }; |
8388 | |
8389 | static struct func_prototype *hg_fp; |
8390 | static int hg_fp_cnt; |
8391 | |
5fa1256f |
8392 | static struct scanned_var { |
8393 | char name[NAMELEN]; |
8394 | enum opr_lenmod lmod; |
8395 | unsigned int is_seeded:1; |
61e29183 |
8396 | unsigned int is_c_str:1; |
c0de9015 |
8397 | const struct parsed_proto *pp; // seed pp, if any |
5fa1256f |
8398 | } *hg_vars; |
8399 | static int hg_var_cnt; |
8400 | |
8c999988 |
8401 | static char **hg_refs; |
8402 | static int hg_ref_cnt; |
8403 | |
9af2d373 |
8404 | static void output_hdr_fp(FILE *fout, const struct func_prototype *fp, |
8405 | int count); |
8406 | |
8c999988 |
8407 | static struct func_prototype *hg_fp_add(const char *funcn) |
ebc4dc43 |
8408 | { |
8409 | struct func_prototype *fp; |
8410 | |
8411 | if ((hg_fp_cnt & 0xff) == 0) { |
8412 | hg_fp = realloc(hg_fp, sizeof(hg_fp[0]) * (hg_fp_cnt + 0x100)); |
8413 | my_assert_not(hg_fp, NULL); |
8414 | memset(hg_fp + hg_fp_cnt, 0, sizeof(hg_fp[0]) * 0x100); |
8415 | } |
8416 | |
8417 | fp = &hg_fp[hg_fp_cnt]; |
8418 | snprintf(fp->name, sizeof(fp->name), "%s", funcn); |
8419 | fp->id = hg_fp_cnt; |
8420 | fp->argc_stack = -1; |
8421 | hg_fp_cnt++; |
8422 | |
8423 | return fp; |
8424 | } |
8425 | |
92d715b6 |
8426 | static struct func_proto_dep *hg_fp_find_dep(struct func_prototype *fp, |
8427 | const char *name) |
8428 | { |
8429 | int i; |
8430 | |
8431 | for (i = 0; i < fp->dep_func_cnt; i++) |
8432 | if (IS(fp->dep_func[i].name, name)) |
8433 | return &fp->dep_func[i]; |
8434 | |
8435 | return NULL; |
8436 | } |
8437 | |
615dbae1 |
8438 | static void hg_fp_add_dep(struct func_prototype *fp, const char *name, |
8439 | unsigned int ptr_taken) |
92d715b6 |
8440 | { |
615dbae1 |
8441 | struct func_proto_dep * dep; |
8442 | |
92d715b6 |
8443 | // is it a dupe? |
615dbae1 |
8444 | dep = hg_fp_find_dep(fp, name); |
8445 | if (dep != NULL && dep->ptr_taken == ptr_taken) |
92d715b6 |
8446 | return; |
8447 | |
8448 | if ((fp->dep_func_cnt & 0xff) == 0) { |
8449 | fp->dep_func = realloc(fp->dep_func, |
8450 | sizeof(fp->dep_func[0]) * (fp->dep_func_cnt + 0x100)); |
8451 | my_assert_not(fp->dep_func, NULL); |
8452 | memset(&fp->dep_func[fp->dep_func_cnt], 0, |
8453 | sizeof(fp->dep_func[0]) * 0x100); |
8454 | } |
8455 | fp->dep_func[fp->dep_func_cnt].name = strdup(name); |
615dbae1 |
8456 | fp->dep_func[fp->dep_func_cnt].ptr_taken = ptr_taken; |
92d715b6 |
8457 | fp->dep_func_cnt++; |
8458 | } |
8459 | |
8460 | static int hg_fp_cmp_name(const void *p1_, const void *p2_) |
8461 | { |
8462 | const struct func_prototype *p1 = p1_, *p2 = p2_; |
8463 | return strcmp(p1->name, p2->name); |
8464 | } |
8465 | |
8466 | #if 0 |
8467 | static int hg_fp_cmp_id(const void *p1_, const void *p2_) |
8468 | { |
8469 | const struct func_prototype *p1 = p1_, *p2 = p2_; |
8470 | return p1->id - p2->id; |
8471 | } |
8472 | #endif |
8473 | |
8c999988 |
8474 | static void hg_ref_add(const char *name) |
8475 | { |
8476 | if ((hg_ref_cnt & 0xff) == 0) { |
8477 | hg_refs = realloc(hg_refs, sizeof(hg_refs[0]) * (hg_ref_cnt + 0x100)); |
8478 | my_assert_not(hg_refs, NULL); |
8479 | memset(hg_refs + hg_ref_cnt, 0, sizeof(hg_refs[0]) * 0x100); |
8480 | } |
8481 | |
8482 | hg_refs[hg_ref_cnt] = strdup(name); |
8483 | my_assert_not(hg_refs[hg_ref_cnt], NULL); |
8484 | hg_ref_cnt++; |
8485 | } |
8486 | |
91ca764a |
8487 | // recursive register dep pass |
8488 | // - track saved regs (part 2) |
8489 | // - try to figure out arg-regs |
8490 | // - calculate reg deps |
8491 | static void gen_hdr_dep_pass(int i, int opcnt, unsigned char *cbits, |
8492 | struct func_prototype *fp, int regmask_save, int regmask_dst, |
427da1c9 |
8493 | int *regmask_dep, int *regmask_use, int *has_ret) |
91ca764a |
8494 | { |
8495 | struct func_proto_dep *dep; |
8496 | struct parsed_op *po; |
8497 | int from_caller = 0; |
91ca764a |
8498 | int j, l; |
8499 | int reg; |
8500 | int ret; |
8501 | |
8502 | for (; i < opcnt; i++) |
8503 | { |
8504 | if (cbits[i >> 3] & (1 << (i & 7))) |
8505 | return; |
8506 | cbits[i >> 3] |= (1 << (i & 7)); |
8507 | |
8508 | po = &ops[i]; |
8509 | |
8510 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
04abc5d6 |
8511 | if (po->flags & OPF_RMD) |
8512 | continue; |
8513 | |
91ca764a |
8514 | if (po->btj != NULL) { |
8515 | // jumptable |
8516 | for (j = 0; j < po->btj->count; j++) { |
db63af51 |
8517 | check_i(po, po->btj->d[j].bt_i); |
91ca764a |
8518 | gen_hdr_dep_pass(po->btj->d[j].bt_i, opcnt, cbits, fp, |
427da1c9 |
8519 | regmask_save, regmask_dst, regmask_dep, regmask_use, |
8520 | has_ret); |
91ca764a |
8521 | } |
8522 | return; |
8523 | } |
8524 | |
db63af51 |
8525 | check_i(po, po->bt_i); |
91ca764a |
8526 | if (po->flags & OPF_CJMP) { |
8527 | gen_hdr_dep_pass(po->bt_i, opcnt, cbits, fp, |
427da1c9 |
8528 | regmask_save, regmask_dst, regmask_dep, regmask_use, |
8529 | has_ret); |
91ca764a |
8530 | } |
8531 | else { |
8532 | i = po->bt_i - 1; |
8533 | } |
8534 | continue; |
8535 | } |
8536 | |
8537 | if (po->flags & OPF_FARG) |
8538 | /* (just calculate register deps) */; |
8539 | else if (po->op == OP_PUSH && po->operand[0].type == OPT_REG) |
8540 | { |
8541 | reg = po->operand[0].reg; |
b2bd20c0 |
8542 | ferr_assert(po, reg >= 0); |
91ca764a |
8543 | |
8544 | if (po->flags & OPF_RSAVE) { |
8545 | regmask_save |= 1 << reg; |
8546 | continue; |
8547 | } |
8548 | if (po->flags & OPF_DONE) |
8549 | continue; |
8550 | |
7a3c5555 |
8551 | ret = scan_for_pop(i + 1, opcnt, i + opcnt * 2, |
8552 | reg, 0, 0, 0, 0); |
91ca764a |
8553 | if (ret == 1) { |
8554 | regmask_save |= 1 << reg; |
8555 | po->flags |= OPF_RMD; |
7a3c5555 |
8556 | scan_for_pop(i + 1, opcnt, i + opcnt * 3, |
8557 | reg, 0, 0, 0, OPF_RMD); |
91ca764a |
8558 | continue; |
8559 | } |
8560 | } |
8561 | else if (po->flags & OPF_RMD) |
8562 | continue; |
8563 | else if (po->op == OP_CALL) { |
8564 | po->regmask_dst |= 1 << xAX; |
8565 | |
8566 | dep = hg_fp_find_dep(fp, po->operand[0].name); |
e627c4d0 |
8567 | if (dep != NULL) { |
91ca764a |
8568 | dep->regmask_live = regmask_save | regmask_dst; |
e627c4d0 |
8569 | if (g_bp_frame && !(po->flags & OPF_EBP_S)) |
8570 | dep->regmask_live |= 1 << xBP; |
8571 | } |
91ca764a |
8572 | } |
8573 | else if (po->op == OP_RET) { |
8574 | if (po->operand_cnt > 0) { |
8575 | fp->is_stdcall = 1; |
8576 | if (fp->argc_stack >= 0 |
8577 | && fp->argc_stack != po->operand[0].val / 4) |
8578 | ferr(po, "ret mismatch? (%d)\n", fp->argc_stack * 4); |
8579 | fp->argc_stack = po->operand[0].val / 4; |
8580 | } |
8581 | } |
8582 | |
427da1c9 |
8583 | if (!fp->eax_pass && (po->flags & OPF_TAIL)) { |
91ca764a |
8584 | if (po->op == OP_CALL) { |
8585 | j = i; |
8586 | ret = 1; |
8587 | } |
8588 | else { |
b2bd20c0 |
8589 | struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, xAX); |
91ca764a |
8590 | j = -1; |
8591 | from_caller = 0; |
8592 | ret = resolve_origin(i, &opr, i + opcnt * 4, &j, &from_caller); |
8593 | } |
8594 | |
ebc4dc43 |
8595 | if (ret != 1 && from_caller) { |
91ca764a |
8596 | // unresolved eax - probably void func |
8597 | *has_ret = 0; |
087ced53 |
8598 | fp->eax_pass = 1; |
91ca764a |
8599 | } |
8600 | else { |
ebc4dc43 |
8601 | if (j >= 0 && ops[j].op == OP_CALL) { |
427da1c9 |
8602 | if (ops[j].pp != NULL && !ops[j].pp->is_unresolved) { |
8603 | int call_has_ret = !IS(ops[j].pp->ret_type.name, "void"); |
8604 | if (ops[j].pp->is_noreturn) { |
8605 | // could be some fail path |
8606 | if (*has_ret == -1) |
8607 | *has_ret = call_has_ret; |
8608 | } |
8609 | else |
8610 | *has_ret = call_has_ret; |
8611 | } |
8612 | else { |
8613 | dep = hg_fp_find_dep(fp, ops[j].operand[0].name); |
8614 | if (dep != NULL) |
8615 | dep->ret_dep = 1; |
8616 | else |
8617 | *has_ret = 1; |
8618 | } |
91ca764a |
8619 | } |
8620 | else |
8621 | *has_ret = 1; |
8622 | } |
8623 | } |
8624 | |
8625 | l = regmask_save | regmask_dst; |
8626 | if (g_bp_frame && !(po->flags & OPF_EBP_S)) |
8627 | l |= 1 << xBP; |
8628 | |
8629 | l = po->regmask_src & ~l; |
8630 | #if 0 |
8631 | if (l) |
8632 | fnote(po, "dep |= %04x, dst %04x, save %04x (f %x)\n", |
8633 | l, regmask_dst, regmask_save, po->flags); |
8634 | #endif |
8635 | *regmask_dep |= l; |
427da1c9 |
8636 | *regmask_use |= (po->regmask_src | po->regmask_dst) |
8637 | & ~regmask_save; |
91ca764a |
8638 | regmask_dst |= po->regmask_dst; |
8639 | |
354f5504 |
8640 | if (po->flags & OPF_TAIL) { |
8641 | if (!(po->flags & OPF_CC)) // not cond. tailcall |
8642 | return; |
8643 | } |
91ca764a |
8644 | } |
8645 | } |
8646 | |
92d715b6 |
8647 | static void gen_hdr(const char *funcn, int opcnt) |
8648 | { |
91ca764a |
8649 | unsigned char cbits[MAX_OPS / 8]; |
ebc4dc43 |
8650 | const struct parsed_proto *pp_c; |
9af2d373 |
8651 | struct parsed_proto *pp; |
92d715b6 |
8652 | struct func_prototype *fp; |
427da1c9 |
8653 | struct func_proto_dep *dep; |
92d715b6 |
8654 | struct parsed_op *po; |
615dbae1 |
8655 | const char *tmpname; |
26677139 |
8656 | int regmask_dummy = 0; |
91ca764a |
8657 | int regmask_dep; |
427da1c9 |
8658 | int regmask_use; |
92d715b6 |
8659 | int max_bp_offset = 0; |
91ca764a |
8660 | int has_ret; |
bfacdc83 |
8661 | int i, j, l; |
8662 | int ret; |
92d715b6 |
8663 | |
ebc4dc43 |
8664 | pp_c = proto_parse(g_fhdr, funcn, 1); |
8665 | if (pp_c != NULL) |
8666 | // already in seed, will add to hg_fp later |
9af2d373 |
8667 | return; |
ebc4dc43 |
8668 | |
8669 | fp = hg_fp_add(funcn); |
9af2d373 |
8670 | |
8671 | g_bp_frame = g_sp_frame = g_stack_fsz = 0; |
8672 | g_stack_frame_used = 0; |
ba93cc12 |
8673 | g_seh_size = 0; |
9af2d373 |
8674 | |
92d715b6 |
8675 | // pass1: |
66bdb2b0 |
8676 | // - resolve all branches |
8677 | // - parse calls with labels |
8678 | resolve_branches_parse_calls(opcnt); |
8679 | |
8680 | // pass2: |
9af2d373 |
8681 | // - handle ebp/esp frame, remove ops related to it |
f9327ad4 |
8682 | scan_prologue_epilogue(opcnt, NULL); |
9af2d373 |
8683 | |
66bdb2b0 |
8684 | // pass3: |
8685 | // - remove dead labels |
92d715b6 |
8686 | // - collect calls |
615dbae1 |
8687 | // - collect function ptr refs |
92d715b6 |
8688 | for (i = 0; i < opcnt; i++) |
8689 | { |
66bdb2b0 |
8690 | if (g_labels[i] != NULL && g_label_refs[i].i == -1) { |
8691 | free(g_labels[i]); |
8692 | g_labels[i] = NULL; |
8693 | } |
92d715b6 |
8694 | |
66bdb2b0 |
8695 | po = &ops[i]; |
5e49b270 |
8696 | if (po->flags & (OPF_RMD|OPF_DONE)) |
92d715b6 |
8697 | continue; |
8698 | |
8699 | if (po->op == OP_CALL) { |
66bdb2b0 |
8700 | if (po->operand[0].type == OPT_LABEL) |
615dbae1 |
8701 | hg_fp_add_dep(fp, opr_name(po, 0), 0); |
66bdb2b0 |
8702 | else if (po->pp != NULL) |
615dbae1 |
8703 | hg_fp_add_dep(fp, po->pp->name, 0); |
8704 | } |
8705 | else if (po->op == OP_MOV && po->operand[1].type == OPT_OFFSET) { |
8706 | tmpname = opr_name(po, 1); |
8707 | if (IS_START(tmpname, "p_") || IS_START(tmpname, "sub_")) |
8708 | hg_fp_add_dep(fp, tmpname, 1); |
8709 | } |
8710 | else if (po->op == OP_PUSH && po->operand[0].type == OPT_OFFSET) { |
8711 | tmpname = opr_name(po, 0); |
8712 | if (IS_START(tmpname, "p_") || IS_START(tmpname, "sub_")) |
8713 | hg_fp_add_dep(fp, tmpname, 1); |
92d715b6 |
8714 | } |
92d715b6 |
8715 | } |
8716 | |
66bdb2b0 |
8717 | // pass4: |
9af2d373 |
8718 | // - handle push <const>/pop pairs |
92d715b6 |
8719 | for (i = 0; i < opcnt; i++) |
8720 | { |
91ca764a |
8721 | po = &ops[i]; |
8722 | if (po->flags & (OPF_RMD|OPF_DONE)) |
8723 | continue; |
8724 | |
8725 | if (po->op == OP_PUSH && po->operand[0].type == OPT_CONST) |
e83ea7ed |
8726 | scan_for_pop_const(i, opcnt, i + opcnt * 13); |
91ca764a |
8727 | } |
8728 | |
66bdb2b0 |
8729 | // pass5: |
91ca764a |
8730 | // - process trivial calls |
8731 | for (i = 0; i < opcnt; i++) |
8732 | { |
9af2d373 |
8733 | po = &ops[i]; |
5e49b270 |
8734 | if (po->flags & (OPF_RMD|OPF_DONE)) |
9af2d373 |
8735 | continue; |
8736 | |
26677139 |
8737 | if (po->op == OP_CALL) |
8738 | { |
8739 | pp = process_call_early(i, opcnt, &j); |
8740 | if (pp != NULL) { |
8741 | if (!(po->flags & OPF_ATAIL)) |
8742 | // since we know the args, try to collect them |
30620174 |
8743 | if (collect_call_args_early(i, pp, NULL, NULL) != 0) |
26677139 |
8744 | pp = NULL; |
8745 | } |
8746 | |
8747 | if (pp != NULL) { |
8748 | if (j >= 0) { |
8749 | // commit esp adjust |
5e49b270 |
8750 | if (ops[j].op != OP_POP) |
8751 | patch_esp_adjust(&ops[j], pp->argc_stack * 4); |
bfacdc83 |
8752 | else { |
8753 | for (l = 0; l < pp->argc_stack; l++) |
b2bd20c0 |
8754 | ops[j + l].flags |= OPF_DONE | OPF_RMD | OPF_NOREGS; |
bfacdc83 |
8755 | } |
26677139 |
8756 | } |
8757 | |
8758 | po->flags |= OPF_DONE; |
8759 | } |
8760 | } |
26677139 |
8761 | } |
8762 | |
66bdb2b0 |
8763 | // pass6: |
5e49b270 |
8764 | // - track saved regs (simple) |
26677139 |
8765 | // - process calls |
8766 | for (i = 0; i < opcnt; i++) |
8767 | { |
8768 | po = &ops[i]; |
5e49b270 |
8769 | if (po->flags & (OPF_RMD|OPF_DONE)) |
26677139 |
8770 | continue; |
8771 | |
e83ea7ed |
8772 | if (po->op == OP_PUSH && po->operand[0].type == OPT_REG |
8773 | && po->operand[0].reg != xCX) |
5e49b270 |
8774 | { |
e83ea7ed |
8775 | ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, 0); |
b2bd20c0 |
8776 | if (ret == 1) { |
91ca764a |
8777 | // regmask_save |= 1 << po->operand[0].reg; // do it later |
8778 | po->flags |= OPF_RSAVE | OPF_RMD | OPF_DONE; |
e83ea7ed |
8779 | scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, OPF_RMD); |
5e49b270 |
8780 | } |
8781 | } |
e83ea7ed |
8782 | else if (po->op == OP_CALL) |
26677139 |
8783 | { |
9af2d373 |
8784 | pp = process_call(i, opcnt); |
8785 | |
8786 | if (!pp->is_unresolved && !(po->flags & OPF_ATAIL)) { |
9af2d373 |
8787 | // since we know the args, collect them |
8c83cc48 |
8788 | ret = collect_call_args(po, i, pp, ®mask_dummy, |
8789 | i + opcnt * 1); |
9af2d373 |
8790 | } |
427da1c9 |
8791 | if (!(po->flags & OPF_TAIL) |
8792 | && po->operand[0].type == OPT_LABEL) |
8793 | { |
8794 | dep = hg_fp_find_dep(fp, opr_name(po, 0)); |
8795 | ferr_assert(po, dep != NULL); |
8796 | // treat al write as overwrite to avoid many false positives |
8797 | find_next_read_reg(i + 1, opcnt, xAX, OPLM_BYTE, |
8798 | i + opcnt * 25, &j); |
8799 | if (j != -1) |
8800 | dep->has_ret = 1; |
8801 | find_next_read_reg(i + 1, opcnt, xDX, OPLM_BYTE, |
8802 | i + opcnt * 26, &j); |
8803 | if (j != -1 && !IS_OP_INDIRECT_CALL(&ops[j])) |
8804 | dep->has_ret64 = 1; |
8805 | } |
9af2d373 |
8806 | } |
92d715b6 |
8807 | } |
8808 | |
66bdb2b0 |
8809 | // pass7 |
354f5504 |
8810 | memset(cbits, 0, (opcnt + 7) / 8); |
427da1c9 |
8811 | regmask_dep = regmask_use = 0; |
91ca764a |
8812 | has_ret = -1; |
8813 | |
427da1c9 |
8814 | gen_hdr_dep_pass(0, opcnt, cbits, fp, 0, 0, |
8815 | ®mask_dep, ®mask_use, &has_ret); |
91ca764a |
8816 | |
8817 | // find unreachable code - must be fixed in IDA |
92d715b6 |
8818 | for (i = 0; i < opcnt; i++) |
8819 | { |
91ca764a |
8820 | if (cbits[i >> 3] & (1 << (i & 7))) |
9af2d373 |
8821 | continue; |
92d715b6 |
8822 | |
04abc5d6 |
8823 | if (g_labels[i] == NULL && i > 0 && ops[i - 1].op == OP_CALL |
8824 | && ops[i - 1].pp != NULL && ops[i - 1].pp->is_osinc) |
8825 | { |
8826 | // the compiler sometimes still generates code after |
8827 | // noreturn OS functions |
8828 | break; |
8829 | } |
0a2c6da1 |
8830 | if (!(ops[i].flags & OPF_RMD) |
8831 | && ops[i].op != OP_NOP && ops[i].op != OPP_ABORT) |
8832 | { |
91ca764a |
8833 | ferr(&ops[i], "unreachable code\n"); |
0a2c6da1 |
8834 | } |
92d715b6 |
8835 | } |
8836 | |
9af2d373 |
8837 | for (i = 0; i < g_eqcnt; i++) { |
92d715b6 |
8838 | if (g_eqs[i].offset > max_bp_offset && g_eqs[i].offset < 4*32) |
8839 | max_bp_offset = g_eqs[i].offset; |
9af2d373 |
8840 | } |
92d715b6 |
8841 | |
9af2d373 |
8842 | if (fp->argc_stack < 0) { |
92d715b6 |
8843 | max_bp_offset = (max_bp_offset + 3) & ~3; |
9af2d373 |
8844 | fp->argc_stack = max_bp_offset / 4; |
8845 | if ((g_ida_func_attr & IDAFA_BP_FRAME) && fp->argc_stack > 0) |
92d715b6 |
8846 | fp->argc_stack--; |
8847 | } |
8848 | |
622eb2ef |
8849 | fp->regmask_dep = regmask_dep & ~((1 << xSP) | mxSTa); |
427da1c9 |
8850 | fp->regmask_use = regmask_use; |
92d715b6 |
8851 | fp->has_ret = has_ret; |
91ca764a |
8852 | #if 0 |
8853 | printf("// has_ret %d, regmask_dep %x\n", |
8854 | fp->has_ret, fp->regmask_dep); |
8855 | output_hdr_fp(stdout, fp, 1); |
ebc4dc43 |
8856 | if (IS(funcn, "sub_10007F72")) exit(1); |
91ca764a |
8857 | #endif |
9af2d373 |
8858 | |
8859 | gen_x_cleanup(opcnt); |
92d715b6 |
8860 | } |
8861 | |
8862 | static void hg_fp_resolve_deps(struct func_prototype *fp) |
8863 | { |
8864 | struct func_prototype fp_s; |
427da1c9 |
8865 | struct func_proto_dep *dep; |
8866 | int regmask_dep; |
92d715b6 |
8867 | int i; |
8868 | |
8869 | // this thing is recursive, so mark first.. |
8870 | fp->dep_resolved = 1; |
8871 | |
8872 | for (i = 0; i < fp->dep_func_cnt; i++) { |
427da1c9 |
8873 | dep = &fp->dep_func[i]; |
8874 | |
8875 | strcpy(fp_s.name, dep->name); |
8876 | dep->proto = bsearch(&fp_s, hg_fp, hg_fp_cnt, |
92d715b6 |
8877 | sizeof(hg_fp[0]), hg_fp_cmp_name); |
427da1c9 |
8878 | if (dep->proto != NULL) { |
615dbae1 |
8879 | if (dep->ptr_taken) { |
8880 | dep->proto->ptr_taken = 1; |
8881 | continue; |
8882 | } |
8883 | |
427da1c9 |
8884 | if (!dep->proto->dep_resolved) |
8885 | hg_fp_resolve_deps(dep->proto); |
92d715b6 |
8886 | |
427da1c9 |
8887 | regmask_dep = ~dep->regmask_live |
8888 | & dep->proto->regmask_dep; |
8889 | fp->regmask_dep |= regmask_dep; |
91ca764a |
8890 | // printf("dep %s %s |= %x\n", fp->name, |
427da1c9 |
8891 | // fp->dep_func[i].name, regmask_dep); |
92d715b6 |
8892 | |
427da1c9 |
8893 | if (dep->has_ret && (dep->proto->regmask_use & mxAX)) |
8894 | dep->proto->has_ret = 1; |
8895 | if (dep->has_ret64 && (dep->proto->regmask_use & mxDX)) |
8896 | dep->proto->has_ret64 = 1; |
8897 | if (fp->has_ret == -1 && dep->ret_dep) |
8898 | fp->has_ret = dep->proto->has_ret; |
92d715b6 |
8899 | } |
8900 | } |
8901 | } |
8902 | |
8c999988 |
8903 | // make all thiscall/edx arg functions referenced from .data fastcall |
8904 | static void do_func_refs_from_data(void) |
8905 | { |
8906 | struct func_prototype *fp, fp_s; |
8907 | int i; |
8908 | |
8909 | for (i = 0; i < hg_ref_cnt; i++) { |
8910 | strcpy(fp_s.name, hg_refs[i]); |
8911 | fp = bsearch(&fp_s, hg_fp, hg_fp_cnt, |
8912 | sizeof(hg_fp[0]), hg_fp_cmp_name); |
615dbae1 |
8913 | if (fp != NULL) |
8914 | fp->ptr_taken = 1; |
8c999988 |
8915 | } |
8916 | } |
8917 | |
9af2d373 |
8918 | static void output_hdr_fp(FILE *fout, const struct func_prototype *fp, |
8919 | int count) |
92d715b6 |
8920 | { |
61e29183 |
8921 | const struct parsed_proto *pp; |
8922 | char *p, namebuf[NAMELEN]; |
8923 | const char *name; |
92d715b6 |
8924 | int regmask_dep; |
226e8df1 |
8925 | int argc_normal; |
9af2d373 |
8926 | int j, arg; |
92d715b6 |
8927 | |
9af2d373 |
8928 | for (; count > 0; count--, fp++) { |
92d715b6 |
8929 | if (fp->has_ret == -1) |
8930 | fprintf(fout, "// ret unresolved\n"); |
8931 | #if 0 |
8932 | fprintf(fout, "// dep:"); |
8933 | for (j = 0; j < fp->dep_func_cnt; j++) { |
8934 | fprintf(fout, " %s/", fp->dep_func[j].name); |
8935 | if (fp->dep_func[j].proto != NULL) |
8936 | fprintf(fout, "%04x/%d", fp->dep_func[j].proto->regmask_dep, |
8937 | fp->dep_func[j].proto->has_ret); |
8938 | } |
8939 | fprintf(fout, "\n"); |
8940 | #endif |
8941 | |
61e29183 |
8942 | p = strchr(fp->name, '@'); |
8943 | if (p != NULL) { |
8944 | memcpy(namebuf, fp->name, p - fp->name); |
8945 | namebuf[p - fp->name] = 0; |
8946 | name = namebuf; |
8947 | } |
8948 | else |
8949 | name = fp->name; |
8950 | if (name[0] == '_') |
8951 | name++; |
8952 | |
8953 | pp = proto_parse(g_fhdr, name, 1); |
8954 | if (pp != NULL && pp->is_include) |
8955 | continue; |
8956 | |
c0de9015 |
8957 | if (fp->pp != NULL) { |
4e81a3a2 |
8958 | // part of seed, output later |
8959 | continue; |
c0de9015 |
8960 | } |
8961 | |
92d715b6 |
8962 | regmask_dep = fp->regmask_dep; |
226e8df1 |
8963 | argc_normal = fp->argc_stack; |
615dbae1 |
8964 | if (fp->ptr_taken && regmask_dep |
8965 | && (regmask_dep & ~(mxCX|mxDX)) == 0) |
8966 | { |
8967 | if ((regmask_dep & mxDX) || fp->argc_stack > 0) |
8968 | regmask_dep |= mxCX | mxDX; |
8969 | } |
92d715b6 |
8970 | |
427da1c9 |
8971 | fprintf(fout, "%-5s", |
8972 | fp->pp ? fp->pp->ret_type.name : |
8973 | fp->has_ret64 ? "__int64" : |
8974 | fp->has_ret ? "int" : "void"); |
226e8df1 |
8975 | if (regmask_dep && (fp->is_stdcall || fp->argc_stack > 0) |
8976 | && (regmask_dep & ~mxCX) == 0) |
8977 | { |
8978 | fprintf(fout, "/*__thiscall*/ "); |
8979 | argc_normal++; |
8980 | regmask_dep = 0; |
8981 | } |
236c23eb |
8982 | else if ((regmask_dep == (mxCX | mxDX) |
8983 | && (fp->is_stdcall || fp->argc_stack == 0)) |
8984 | || (regmask_dep == mxCX && fp->argc_stack == 0)) |
92d715b6 |
8985 | { |
9af2d373 |
8986 | fprintf(fout, " __fastcall "); |
226e8df1 |
8987 | if (!(regmask_dep & (1 << xDX)) && fp->argc_stack == 0) |
8988 | argc_normal = 1; |
92d715b6 |
8989 | else |
226e8df1 |
8990 | argc_normal += 2; |
92d715b6 |
8991 | regmask_dep = 0; |
8992 | } |
8993 | else if (regmask_dep && !fp->is_stdcall) { |
8994 | fprintf(fout, "/*__usercall*/ "); |
92d715b6 |
8995 | } |
8996 | else if (regmask_dep) { |
8997 | fprintf(fout, "/*__userpurge*/ "); |
92d715b6 |
8998 | } |
8999 | else if (fp->is_stdcall) |
9af2d373 |
9000 | fprintf(fout, " __stdcall "); |
92d715b6 |
9001 | else |
9af2d373 |
9002 | fprintf(fout, " __cdecl "); |
92d715b6 |
9003 | |
61e29183 |
9004 | fprintf(fout, "%s(", name); |
92d715b6 |
9005 | |
9006 | arg = 0; |
9007 | for (j = 0; j < xSP; j++) { |
9008 | if (regmask_dep & (1 << j)) { |
9009 | arg++; |
9010 | if (arg != 1) |
9011 | fprintf(fout, ", "); |
91ca764a |
9012 | if (fp->pp != NULL) |
9013 | fprintf(fout, "%s", fp->pp->arg[arg - 1].type.name); |
9014 | else |
9015 | fprintf(fout, "int"); |
9016 | fprintf(fout, " a%d/*<%s>*/", arg, regs_r32[j]); |
92d715b6 |
9017 | } |
9018 | } |
9019 | |
226e8df1 |
9020 | for (j = 0; j < argc_normal; j++) { |
92d715b6 |
9021 | arg++; |
9022 | if (arg != 1) |
9023 | fprintf(fout, ", "); |
91ca764a |
9024 | if (fp->pp != NULL) { |
9025 | fprintf(fout, "%s", fp->pp->arg[arg - 1].type.name); |
9026 | if (!fp->pp->arg[arg - 1].type.is_ptr) |
9027 | fprintf(fout, " "); |
9028 | } |
9029 | else |
9030 | fprintf(fout, "int "); |
9031 | fprintf(fout, "a%d", arg); |
92d715b6 |
9032 | } |
9033 | |
9034 | fprintf(fout, ");\n"); |
9035 | } |
9036 | } |
9037 | |
9af2d373 |
9038 | static void output_hdr(FILE *fout) |
9039 | { |
5fa1256f |
9040 | static const char *lmod_c_names[] = { |
9041 | [OPLM_UNSPEC] = "???", |
9042 | [OPLM_BYTE] = "uint8_t", |
9043 | [OPLM_WORD] = "uint16_t", |
9044 | [OPLM_DWORD] = "uint32_t", |
9045 | [OPLM_QWORD] = "uint64_t", |
9046 | }; |
9047 | const struct scanned_var *var; |
ebc4dc43 |
9048 | struct func_prototype *fp; |
c0de9015 |
9049 | char line[256] = { 0, }; |
ebc4dc43 |
9050 | char name[256]; |
9af2d373 |
9051 | int i; |
9052 | |
ebc4dc43 |
9053 | // add stuff from headers |
9054 | for (i = 0; i < pp_cache_size; i++) { |
9055 | if (pp_cache[i].is_cinc && !pp_cache[i].is_stdcall) |
9056 | snprintf(name, sizeof(name), "_%s", pp_cache[i].name); |
9057 | else |
9058 | snprintf(name, sizeof(name), "%s", pp_cache[i].name); |
9059 | fp = hg_fp_add(name); |
9060 | fp->pp = &pp_cache[i]; |
9061 | fp->argc_stack = fp->pp->argc_stack; |
9062 | fp->is_stdcall = fp->pp->is_stdcall; |
b2bd20c0 |
9063 | fp->regmask_dep = get_pp_arg_regmask_src(fp->pp); |
ebc4dc43 |
9064 | fp->has_ret = !IS(fp->pp->ret_type.name, "void"); |
9065 | } |
9066 | |
9af2d373 |
9067 | // resolve deps |
9068 | qsort(hg_fp, hg_fp_cnt, sizeof(hg_fp[0]), hg_fp_cmp_name); |
9069 | for (i = 0; i < hg_fp_cnt; i++) |
9070 | hg_fp_resolve_deps(&hg_fp[i]); |
9071 | |
8c999988 |
9072 | // adjust functions referenced from data segment |
9073 | do_func_refs_from_data(); |
9074 | |
087ced53 |
9075 | // final adjustments |
9076 | for (i = 0; i < hg_fp_cnt; i++) { |
9077 | if (hg_fp[i].eax_pass && (hg_fp[i].regmask_dep & mxAX)) |
9078 | hg_fp[i].has_ret = 1; |
9079 | } |
9080 | |
9af2d373 |
9081 | // note: messes up .proto ptr, don't use |
9082 | //qsort(hg_fp, hg_fp_cnt, sizeof(hg_fp[0]), hg_fp_cmp_id); |
9083 | |
5fa1256f |
9084 | // output variables |
9085 | for (i = 0; i < hg_var_cnt; i++) { |
9086 | var = &hg_vars[i]; |
9087 | |
4e81a3a2 |
9088 | if (var->pp != NULL) |
9089 | // part of seed |
9090 | continue; |
c0de9015 |
9091 | else if (var->is_c_str) |
61e29183 |
9092 | fprintf(fout, "extern %-8s %s[];", "char", var->name); |
9093 | else |
9094 | fprintf(fout, "extern %-8s %s;", |
9095 | lmod_c_names[var->lmod], var->name); |
5fa1256f |
9096 | |
9097 | if (var->is_seeded) |
9098 | fprintf(fout, " // seeded"); |
9099 | fprintf(fout, "\n"); |
9100 | } |
9101 | |
9102 | fprintf(fout, "\n"); |
9103 | |
9104 | // output function prototypes |
9af2d373 |
9105 | output_hdr_fp(fout, hg_fp, hg_fp_cnt); |
c0de9015 |
9106 | |
4e81a3a2 |
9107 | // seed passthrough |
9108 | fprintf(fout, "\n// - seed -\n"); |
c0de9015 |
9109 | |
9110 | rewind(g_fhdr); |
4e81a3a2 |
9111 | while (fgets(line, sizeof(line), g_fhdr)) |
9112 | fwrite(line, 1, strlen(line), fout); |
9af2d373 |
9113 | } |
9114 | |
61e29183 |
9115 | // '=' needs special treatment |
9116 | // also ' quote |
bfa4a6ee |
9117 | static char *next_word_s(char *w, size_t wsize, char *s) |
9118 | { |
61e29183 |
9119 | size_t i; |
bfa4a6ee |
9120 | |
61e29183 |
9121 | s = sskip(s); |
bfa4a6ee |
9122 | |
61e29183 |
9123 | i = 0; |
8c999988 |
9124 | if (*s == '\'' && s[1] != '\r' && s[1] != '\n') { |
61e29183 |
9125 | w[0] = s[0]; |
9126 | for (i = 1; i < wsize - 1; i++) { |
9127 | if (s[i] == 0) { |
9128 | printf("warning: missing closing quote: \"%s\"\n", s); |
9129 | break; |
9130 | } |
9131 | if (s[i] == '\'') |
9132 | break; |
9133 | w[i] = s[i]; |
9134 | } |
9135 | } |
bfa4a6ee |
9136 | |
61e29183 |
9137 | for (; i < wsize - 1; i++) { |
9138 | if (s[i] == 0 || my_isblank(s[i]) || (s[i] == '=' && i > 0)) |
9139 | break; |
9140 | w[i] = s[i]; |
9141 | } |
9142 | w[i] = 0; |
9143 | |
9144 | if (s[i] != 0 && !my_isblank(s[i]) && s[i] != '=') |
9145 | printf("warning: '%s' truncated\n", w); |
bfa4a6ee |
9146 | |
61e29183 |
9147 | return s + i; |
bfa4a6ee |
9148 | } |
9149 | |
4c20744d |
9150 | static int cmpstringp(const void *p1, const void *p2) |
9151 | { |
9152 | return strcmp(*(char * const *)p1, *(char * const *)p2); |
9153 | } |
9154 | |
9155 | static int is_xref_needed(char *p, char **rlist, int rlist_len) |
9156 | { |
9157 | char *p2; |
9158 | |
9159 | p = sskip(p); |
9160 | if (strstr(p, "...")) |
9161 | // unable to determine, assume needed |
9162 | return 1; |
9163 | |
9164 | if (*p == '.') // .text, .data, ... |
9165 | // ref from other data or non-function -> no |
9166 | return 0; |
9167 | |
9168 | p2 = strpbrk(p, "+:\r\n\x18"); |
9169 | if (p2 != NULL) |
9170 | *p2 = 0; |
9171 | if (bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp)) |
9172 | // referenced from removed code |
9173 | return 0; |
9174 | |
9175 | return 1; |
9176 | } |
9177 | |
8c999988 |
9178 | static int ida_xrefs_show_need(FILE *fasm, char *p, |
4c20744d |
9179 | char **rlist, int rlist_len) |
9180 | { |
9181 | int found_need = 0; |
9182 | char line[256]; |
9183 | long pos; |
9184 | |
9185 | p = strrchr(p, ';'); |
ea43585b |
9186 | if (p != NULL && *p == ';') { |
9187 | if (IS_START(p + 2, "sctref")) |
4c20744d |
9188 | return 1; |
ea43585b |
9189 | if (IS_START(p + 2, "DATA XREF: ")) { |
9190 | p += 13; |
9191 | if (is_xref_needed(p, rlist, rlist_len)) |
9192 | return 1; |
9193 | } |
4c20744d |
9194 | } |
9195 | |
9196 | pos = ftell(fasm); |
9197 | while (1) |
9198 | { |
9199 | if (!my_fgets(line, sizeof(line), fasm)) |
9200 | break; |
9201 | // non-first line is always indented |
9202 | if (!my_isblank(line[0])) |
9203 | break; |
9204 | |
9205 | // should be no content, just comment |
9206 | p = sskip(line); |
9207 | if (*p != ';') |
9208 | break; |
9209 | |
9210 | p = strrchr(p, ';'); |
9211 | p += 2; |
ea43585b |
9212 | |
9213 | if (IS_START(p, "sctref")) { |
9214 | found_need = 1; |
9215 | break; |
9216 | } |
9217 | |
4c20744d |
9218 | // it's printed once, but no harm to check again |
9219 | if (IS_START(p, "DATA XREF: ")) |
9220 | p += 11; |
9221 | |
9222 | if (is_xref_needed(p, rlist, rlist_len)) { |
9223 | found_need = 1; |
9224 | break; |
9225 | } |
9226 | } |
9227 | fseek(fasm, pos, SEEK_SET); |
9228 | return found_need; |
9229 | } |
9230 | |
9231 | static void scan_variables(FILE *fasm, char **rlist, int rlist_len) |
5fa1256f |
9232 | { |
5fa1256f |
9233 | struct scanned_var *var; |
9234 | char line[256] = { 0, }; |
8c999988 |
9235 | char words[4][256]; |
9236 | int no_identifier; |
5fa1256f |
9237 | char *p = NULL; |
9238 | int wordc; |
61e29183 |
9239 | int l; |
5fa1256f |
9240 | |
9241 | while (!feof(fasm)) |
9242 | { |
9243 | // skip to next data section |
9244 | while (my_fgets(line, sizeof(line), fasm)) |
9245 | { |
9246 | asmln++; |
9247 | |
9248 | p = sskip(line); |
9249 | if (*p == 0 || *p == ';') |
9250 | continue; |
9251 | |
9252 | p = sskip(next_word_s(words[0], sizeof(words[0]), p)); |
9253 | if (*p == 0 || *p == ';') |
9254 | continue; |
9255 | |
9256 | if (*p != 's' || !IS_START(p, "segment para public")) |
9257 | continue; |
9258 | |
9259 | break; |
9260 | } |
9261 | |
9262 | if (p == NULL || !IS_START(p, "segment para public")) |
9263 | break; |
9264 | p = sskip(p + 19); |
9265 | |
9266 | if (!IS_START(p, "'DATA'")) |
9267 | continue; |
9268 | |
9269 | // now process it |
9270 | while (my_fgets(line, sizeof(line), fasm)) |
9271 | { |
9272 | asmln++; |
9273 | |
9274 | p = line; |
8c999988 |
9275 | no_identifier = my_isblank(*p); |
5fa1256f |
9276 | |
9277 | p = sskip(p); |
9278 | if (*p == 0 || *p == ';') |
9279 | continue; |
9280 | |
9281 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
9282 | words[wordc][0] = 0; |
9283 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
9284 | if (*p == 0 || *p == ';') { |
9285 | wordc++; |
9286 | break; |
9287 | } |
9288 | } |
9289 | |
9290 | if (wordc == 2 && IS(words[1], "ends")) |
9291 | break; |
61e29183 |
9292 | if (wordc < 2) |
9293 | continue; |
5fa1256f |
9294 | |
8c999988 |
9295 | if (no_identifier) { |
9296 | if (wordc >= 3 && IS(words[0], "dd") && IS(words[1], "offset")) |
9297 | hg_ref_add(words[2]); |
9298 | continue; |
9299 | } |
9300 | |
9ea60b8d |
9301 | if (IS_START(words[0], "__IMPORT_DESCRIPTOR_")) { |
9302 | // when this starts, we don't need anything from this section |
9303 | break; |
9304 | } |
9305 | |
4c20744d |
9306 | // check refs comment(s) |
8c999988 |
9307 | if (!ida_xrefs_show_need(fasm, p, rlist, rlist_len)) |
4c20744d |
9308 | continue; |
9309 | |
5fa1256f |
9310 | if ((hg_var_cnt & 0xff) == 0) { |
9311 | hg_vars = realloc(hg_vars, sizeof(hg_vars[0]) |
9312 | * (hg_var_cnt + 0x100)); |
9313 | my_assert_not(hg_vars, NULL); |
9314 | memset(hg_vars + hg_var_cnt, 0, sizeof(hg_vars[0]) * 0x100); |
9315 | } |
9316 | |
9317 | var = &hg_vars[hg_var_cnt++]; |
9318 | snprintf(var->name, sizeof(var->name), "%s", words[0]); |
9319 | |
9320 | // maybe already in seed header? |
c0de9015 |
9321 | var->pp = proto_parse(g_fhdr, var->name, 1); |
9322 | if (var->pp != NULL) { |
9323 | if (var->pp->is_fptr) { |
5fa1256f |
9324 | var->lmod = OPLM_DWORD; |
9325 | //var->is_ptr = 1; |
9326 | } |
c0de9015 |
9327 | else if (var->pp->is_func) |
9328 | aerr("func?\n"); |
9329 | else if (!guess_lmod_from_c_type(&var->lmod, &var->pp->type)) |
5fa1256f |
9330 | aerr("unhandled C type '%s' for '%s'\n", |
c0de9015 |
9331 | var->pp->type.name, var->name); |
5fa1256f |
9332 | |
9333 | var->is_seeded = 1; |
9334 | continue; |
9335 | } |
9336 | |
8c999988 |
9337 | if (IS(words[1], "dd")) { |
5fa1256f |
9338 | var->lmod = OPLM_DWORD; |
8c999988 |
9339 | if (wordc >= 4 && IS(words[2], "offset")) |
9340 | hg_ref_add(words[3]); |
9341 | } |
5fa1256f |
9342 | else if (IS(words[1], "dw")) |
9343 | var->lmod = OPLM_WORD; |
61e29183 |
9344 | else if (IS(words[1], "db")) { |
5fa1256f |
9345 | var->lmod = OPLM_BYTE; |
61e29183 |
9346 | if (wordc >= 3 && (l = strlen(words[2])) > 4) { |
9347 | if (words[2][0] == '\'' && IS(words[2] + l - 2, ",0")) |
9348 | var->is_c_str = 1; |
9349 | } |
9350 | } |
5fa1256f |
9351 | else if (IS(words[1], "dq")) |
9352 | var->lmod = OPLM_QWORD; |
9353 | //else if (IS(words[1], "dt")) |
9354 | else |
9355 | aerr("type '%s' not known\n", words[1]); |
9356 | } |
9357 | } |
9358 | |
9359 | rewind(fasm); |
9360 | asmln = 0; |
9361 | } |
9362 | |
9363 | static void set_label(int i, const char *name) |
9364 | { |
9365 | const char *p; |
9366 | int len; |
9367 | |
9368 | len = strlen(name); |
9369 | p = strchr(name, ':'); |
9370 | if (p != NULL) |
9371 | len = p - name; |
9372 | |
9373 | if (g_labels[i] != NULL && !IS_START(g_labels[i], "algn_")) |
9374 | aerr("dupe label '%s' vs '%s'?\n", name, g_labels[i]); |
9375 | g_labels[i] = realloc(g_labels[i], len + 1); |
9376 | my_assert_not(g_labels[i], NULL); |
9377 | memcpy(g_labels[i], name, len); |
9378 | g_labels[i][len] = 0; |
9379 | } |
9380 | |
e56ab892 |
9381 | struct chunk_item { |
9382 | char *name; |
9383 | long fptr; |
de50b98b |
9384 | int asmln; |
e56ab892 |
9385 | }; |
9386 | |
cdfaeed7 |
9387 | static struct chunk_item *func_chunks; |
9388 | static int func_chunk_cnt; |
9389 | static int func_chunk_alloc; |
9390 | |
9391 | static void add_func_chunk(FILE *fasm, const char *name, int line) |
9392 | { |
9393 | if (func_chunk_cnt >= func_chunk_alloc) { |
9394 | func_chunk_alloc *= 2; |
9395 | func_chunks = realloc(func_chunks, |
9396 | func_chunk_alloc * sizeof(func_chunks[0])); |
9397 | my_assert_not(func_chunks, NULL); |
9398 | } |
9399 | func_chunks[func_chunk_cnt].fptr = ftell(fasm); |
9400 | func_chunks[func_chunk_cnt].name = strdup(name); |
9401 | func_chunks[func_chunk_cnt].asmln = line; |
9402 | func_chunk_cnt++; |
9403 | } |
9404 | |
e56ab892 |
9405 | static int cmp_chunks(const void *p1, const void *p2) |
9406 | { |
9407 | const struct chunk_item *c1 = p1, *c2 = p2; |
9408 | return strcmp(c1->name, c2->name); |
9409 | } |
9410 | |
ea43585b |
9411 | static void scan_ahead_for_chunks(FILE *fasm) |
cdfaeed7 |
9412 | { |
9413 | char words[2][256]; |
9414 | char line[256]; |
9415 | long oldpos; |
9416 | int oldasmln; |
9417 | int wordc; |
9418 | char *p; |
9419 | int i; |
9420 | |
9421 | oldpos = ftell(fasm); |
9422 | oldasmln = asmln; |
9423 | |
5fa1256f |
9424 | while (my_fgets(line, sizeof(line), fasm)) |
cdfaeed7 |
9425 | { |
9426 | wordc = 0; |
9427 | asmln++; |
9428 | |
9429 | p = sskip(line); |
9430 | if (*p == 0) |
9431 | continue; |
9432 | |
9433 | if (*p == ';') |
9434 | { |
9435 | // get rid of random tabs |
9436 | for (i = 0; line[i] != 0; i++) |
9437 | if (line[i] == '\t') |
9438 | line[i] = ' '; |
9439 | |
9440 | if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR ")) |
9441 | { |
9442 | p += 30; |
9443 | next_word(words[0], sizeof(words[0]), p); |
9444 | if (words[0][0] == 0) |
9445 | aerr("missing name for func chunk?\n"); |
9446 | |
9447 | add_func_chunk(fasm, words[0], asmln); |
9448 | } |
46b388c2 |
9449 | else if (IS_START(p, "; sctend")) |
9450 | break; |
9451 | |
cdfaeed7 |
9452 | continue; |
9453 | } // *p == ';' |
9454 | |
9455 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
9456 | words[wordc][0] = 0; |
9457 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
9458 | if (*p == 0 || *p == ';') { |
9459 | wordc++; |
9460 | break; |
9461 | } |
9462 | } |
9463 | |
9464 | if (wordc == 2 && IS(words[1], "ends")) |
9465 | break; |
9466 | } |
9467 | |
9468 | fseek(fasm, oldpos, SEEK_SET); |
9469 | asmln = oldasmln; |
9470 | } |
9471 | |
91977a1c |
9472 | int main(int argc, char *argv[]) |
9473 | { |
06c5d854 |
9474 | FILE *fout, *fasm, *frlist; |
4c45fa73 |
9475 | struct parsed_data *pd = NULL; |
9476 | int pd_alloc = 0; |
9477 | char **rlist = NULL; |
9478 | int rlist_len = 0; |
9479 | int rlist_alloc = 0; |
e56ab892 |
9480 | int func_chunks_used = 0; |
9481 | int func_chunks_sorted = 0; |
e56ab892 |
9482 | int func_chunk_i = -1; |
9483 | long func_chunk_ret = 0; |
de50b98b |
9484 | int func_chunk_ret_ln = 0; |
cdfaeed7 |
9485 | int scanned_ahead = 0; |
91977a1c |
9486 | char line[256]; |
a2c1d768 |
9487 | char words[20][256]; |
4c45fa73 |
9488 | enum opr_lenmod lmod; |
ddaf8bd7 |
9489 | char *sctproto = NULL; |
91977a1c |
9490 | int in_func = 0; |
4c45fa73 |
9491 | int pending_endp = 0; |
11437ea1 |
9492 | int skip_code = 0; |
9493 | int skip_code_end = 0; |
940e8e66 |
9494 | int skip_warned = 0; |
91977a1c |
9495 | int eq_alloc; |
bfa4a6ee |
9496 | int verbose = 0; |
1f84f6b3 |
9497 | int multi_seg = 0; |
46b388c2 |
9498 | int end = 0; |
bfa4a6ee |
9499 | int arg_out; |
89ff3147 |
9500 | int arg; |
91977a1c |
9501 | int pi = 0; |
e56ab892 |
9502 | int i, j; |
9503 | int ret, len; |
087ced53 |
9504 | char *p, *p2; |
91977a1c |
9505 | int wordc; |
9506 | |
89ff3147 |
9507 | for (arg = 1; arg < argc; arg++) { |
9508 | if (IS(argv[arg], "-v")) |
9509 | verbose = 1; |
9510 | else if (IS(argv[arg], "-rf")) |
9511 | g_allow_regfunc = 1; |
8c83cc48 |
9512 | else if (IS(argv[arg], "-uc")) |
9513 | g_allow_user_icall = 1; |
615dbae1 |
9514 | else if (IS(argv[arg], "-wu")) |
9515 | g_nowarn_reguse = 1; |
1f84f6b3 |
9516 | else if (IS(argv[arg], "-m")) |
9517 | multi_seg = 1; |
92d715b6 |
9518 | else if (IS(argv[arg], "-hdr")) |
9af2d373 |
9519 | g_header_mode = g_quiet_pp = g_allow_regfunc = 1; |
89ff3147 |
9520 | else |
9521 | break; |
bfa4a6ee |
9522 | } |
9523 | |
9524 | if (argc < arg + 3) { |
615dbae1 |
9525 | printf("usage:\n%s [options] <.c> <.asm> <hdr.h> [rlist]*\n" |
315b77eb |
9526 | "%s -hdr <out.h> <.asm> <seed.h> [rlist]*\n" |
9527 | "options:\n" |
9528 | " -hdr - header generation mode\n" |
9529 | " -rf - allow unannotated indirect calls\n" |
8c83cc48 |
9530 | " -uc - allow ind. calls/refs to __usercall\n" |
315b77eb |
9531 | " -m - allow multiple .text sections\n" |
615dbae1 |
9532 | " -wu - don't warn about bad reg use\n" |
315b77eb |
9533 | "[rlist] is a file with function names to skip," |
9534 | " one per line\n", |
92d715b6 |
9535 | argv[0], argv[0]); |
91977a1c |
9536 | return 1; |
9537 | } |
9538 | |
bfa4a6ee |
9539 | arg_out = arg++; |
91977a1c |
9540 | |
bfa4a6ee |
9541 | asmfn = argv[arg++]; |
91977a1c |
9542 | fasm = fopen(asmfn, "r"); |
9543 | my_assert_not(fasm, NULL); |
9544 | |
bfa4a6ee |
9545 | hdrfn = argv[arg++]; |
06c5d854 |
9546 | g_fhdr = fopen(hdrfn, "r"); |
9547 | my_assert_not(g_fhdr, NULL); |
bfa4a6ee |
9548 | |
9549 | rlist_alloc = 64; |
9550 | rlist = malloc(rlist_alloc * sizeof(rlist[0])); |
9551 | my_assert_not(rlist, NULL); |
9552 | // needs special handling.. |
9553 | rlist[rlist_len++] = "__alloca_probe"; |
9554 | |
e56ab892 |
9555 | func_chunk_alloc = 32; |
9556 | func_chunks = malloc(func_chunk_alloc * sizeof(func_chunks[0])); |
9557 | my_assert_not(func_chunks, NULL); |
9558 | |
a2c1d768 |
9559 | memset(words, 0, sizeof(words)); |
9560 | |
bfa4a6ee |
9561 | for (; arg < argc; arg++) { |
11437ea1 |
9562 | int skip_func = 0; |
9563 | |
bfa4a6ee |
9564 | frlist = fopen(argv[arg], "r"); |
9565 | my_assert_not(frlist, NULL); |
9566 | |
5fa1256f |
9567 | while (my_fgets(line, sizeof(line), frlist)) { |
bfa4a6ee |
9568 | p = sskip(line); |
1cd4a663 |
9569 | if (*p == 0 || *p == ';') |
9570 | continue; |
9571 | if (*p == '#') { |
89ff3147 |
9572 | if (IS_START(p, "#if 0") |
9573 | || (g_allow_regfunc && IS_START(p, "#if NO_REGFUNC"))) |
9574 | { |
1cd4a663 |
9575 | skip_func = 1; |
89ff3147 |
9576 | } |
1cd4a663 |
9577 | else if (IS_START(p, "#endif")) |
9578 | skip_func = 0; |
9579 | continue; |
9580 | } |
9581 | if (skip_func) |
bfa4a6ee |
9582 | continue; |
9583 | |
9584 | p = next_word(words[0], sizeof(words[0]), p); |
9585 | if (words[0][0] == 0) |
9586 | continue; |
9587 | |
9588 | if (rlist_len >= rlist_alloc) { |
9589 | rlist_alloc = rlist_alloc * 2 + 64; |
9590 | rlist = realloc(rlist, rlist_alloc * sizeof(rlist[0])); |
9591 | my_assert_not(rlist, NULL); |
9592 | } |
9593 | rlist[rlist_len++] = strdup(words[0]); |
9594 | } |
9595 | |
9596 | fclose(frlist); |
9597 | frlist = NULL; |
9598 | } |
9599 | |
9600 | if (rlist_len > 0) |
9601 | qsort(rlist, rlist_len, sizeof(rlist[0]), cmpstringp); |
9602 | |
9603 | fout = fopen(argv[arg_out], "w"); |
91977a1c |
9604 | my_assert_not(fout, NULL); |
9605 | |
9606 | eq_alloc = 128; |
9607 | g_eqs = malloc(eq_alloc * sizeof(g_eqs[0])); |
9608 | my_assert_not(g_eqs, NULL); |
9609 | |
4c45fa73 |
9610 | for (i = 0; i < ARRAY_SIZE(g_label_refs); i++) { |
9611 | g_label_refs[i].i = -1; |
9612 | g_label_refs[i].next = NULL; |
9613 | } |
9614 | |
5fa1256f |
9615 | if (g_header_mode) |
4c20744d |
9616 | scan_variables(fasm, rlist, rlist_len); |
5fa1256f |
9617 | |
9618 | while (my_fgets(line, sizeof(line), fasm)) |
91977a1c |
9619 | { |
4c45fa73 |
9620 | wordc = 0; |
91977a1c |
9621 | asmln++; |
9622 | |
9623 | p = sskip(line); |
1bafb621 |
9624 | if (*p == 0) |
91977a1c |
9625 | continue; |
9626 | |
de50b98b |
9627 | // get rid of random tabs |
9628 | for (i = 0; line[i] != 0; i++) |
9629 | if (line[i] == '\t') |
9630 | line[i] = ' '; |
9631 | |
e56ab892 |
9632 | if (*p == ';') |
9633 | { |
e56ab892 |
9634 | if (p[2] == '=' && IS_START(p, "; =============== S U B")) |
9635 | goto do_pending_endp; // eww.. |
9636 | |
9637 | if (p[2] == 'A' && IS_START(p, "; Attributes:")) |
9638 | { |
9639 | static const char *attrs[] = { |
9640 | "bp-based frame", |
9641 | "library function", |
9642 | "static", |
9643 | "noreturn", |
9644 | "thunk", |
9645 | "fpd=", |
9646 | }; |
9647 | |
9648 | // parse IDA's attribute-list comment |
9649 | g_ida_func_attr = 0; |
9650 | p = sskip(p + 13); |
9651 | |
9652 | for (; *p != 0; p = sskip(p)) { |
9653 | for (i = 0; i < ARRAY_SIZE(attrs); i++) { |
9654 | if (!strncmp(p, attrs[i], strlen(attrs[i]))) { |
9655 | g_ida_func_attr |= 1 << i; |
9656 | p += strlen(attrs[i]); |
9657 | break; |
9658 | } |
9659 | } |
9660 | if (i == ARRAY_SIZE(attrs)) { |
9661 | anote("unparsed IDA attr: %s\n", p); |
1bafb621 |
9662 | break; |
9663 | } |
e56ab892 |
9664 | if (IS(attrs[i], "fpd=")) { |
9665 | p = next_word(words[0], sizeof(words[0]), p); |
9666 | // ignore for now.. |
9667 | } |
1bafb621 |
9668 | } |
e56ab892 |
9669 | } |
7e08c224 |
9670 | else if (p[2] == 's' && IS_START(p, "; sctattr:")) |
9671 | { |
9672 | static const char *attrs[] = { |
9673 | "clear_sf", |
226e8df1 |
9674 | "clear_regmask", |
383dff16 |
9675 | "rm_regmask", |
427da1c9 |
9676 | "nowarn", |
193c11bf |
9677 | "argframe", |
7e08c224 |
9678 | }; |
9679 | |
9680 | // parse manual attribute-list comment |
9681 | g_sct_func_attr = 0; |
9682 | p = sskip(p + 10); |
9683 | |
9684 | for (; *p != 0; p = sskip(p)) { |
9685 | for (i = 0; i < ARRAY_SIZE(attrs); i++) { |
9686 | if (!strncmp(p, attrs[i], strlen(attrs[i]))) { |
9687 | g_sct_func_attr |= 1 << i; |
9688 | p += strlen(attrs[i]); |
9689 | break; |
9690 | } |
9691 | } |
226e8df1 |
9692 | if (*p == '=') { |
9693 | j = ret = 0; |
9694 | if (i == 0) |
9695 | // clear_sf=start,len (in dwords) |
9696 | ret = sscanf(p, "=%d,%d%n", &g_stack_clear_start, |
9697 | &g_stack_clear_len, &j); |
9698 | else if (i == 1) |
9699 | // clear_regmask=<mask> |
6135d8e6 |
9700 | ret = sscanf(p, "=%x%n", &g_regmask_init, &j) + 1; |
383dff16 |
9701 | else if (i == 2) |
9702 | // rm_regmask=<mask> |
9703 | ret = sscanf(p, "=%x%n", &g_regmask_rm, &j) + 1; |
7e08c224 |
9704 | if (ret < 2) { |
226e8df1 |
9705 | anote("unparsed attr value: %s\n", p); |
7e08c224 |
9706 | break; |
9707 | } |
9708 | p += j; |
9709 | } |
9710 | else if (i == ARRAY_SIZE(attrs)) { |
9711 | anote("unparsed sct attr: %s\n", p); |
9712 | break; |
9713 | } |
9714 | } |
9715 | } |
e56ab892 |
9716 | else if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR ")) |
9717 | { |
9718 | p += 30; |
9719 | next_word(words[0], sizeof(words[0]), p); |
9720 | if (words[0][0] == 0) |
cdfaeed7 |
9721 | aerr("missing name for func chunk?\n"); |
9722 | |
9723 | if (!scanned_ahead) { |
9724 | add_func_chunk(fasm, words[0], asmln); |
9725 | func_chunks_sorted = 0; |
e56ab892 |
9726 | } |
e56ab892 |
9727 | } |
9728 | else if (p[2] == 'E' && IS_START(p, "; END OF FUNCTION CHUNK")) |
9729 | { |
9730 | if (func_chunk_i >= 0) { |
9731 | if (func_chunk_i < func_chunk_cnt |
9732 | && IS(func_chunks[func_chunk_i].name, g_func)) |
9733 | { |
9734 | // move on to next chunk |
9735 | ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET); |
9736 | if (ret) |
9737 | aerr("seek failed for '%s' chunk #%d\n", |
9738 | g_func, func_chunk_i); |
de50b98b |
9739 | asmln = func_chunks[func_chunk_i].asmln; |
e56ab892 |
9740 | func_chunk_i++; |
9741 | } |
9742 | else { |
9743 | if (func_chunk_ret == 0) |
9744 | aerr("no return from chunk?\n"); |
9745 | fseek(fasm, func_chunk_ret, SEEK_SET); |
de50b98b |
9746 | asmln = func_chunk_ret_ln; |
e56ab892 |
9747 | func_chunk_ret = 0; |
9748 | pending_endp = 1; |
9749 | } |
1bafb621 |
9750 | } |
e56ab892 |
9751 | } |
9752 | else if (p[2] == 'F' && IS_START(p, "; FUNCTION CHUNK AT ")) { |
9753 | func_chunks_used = 1; |
9754 | p += 20; |
9755 | if (IS_START(g_func, "sub_")) { |
9756 | unsigned long addr = strtoul(p, NULL, 16); |
9757 | unsigned long f_addr = strtoul(g_func + 4, NULL, 16); |
cdfaeed7 |
9758 | if (addr > f_addr && !scanned_ahead) { |
b2bd20c0 |
9759 | //anote("scan_ahead caused by '%s', addr %lx\n", |
9760 | // g_func, addr); |
ea43585b |
9761 | scan_ahead_for_chunks(fasm); |
cdfaeed7 |
9762 | scanned_ahead = 1; |
9763 | func_chunks_sorted = 0; |
9764 | } |
1bafb621 |
9765 | } |
9766 | } |
9767 | continue; |
e56ab892 |
9768 | } // *p == ';' |
1bafb621 |
9769 | |
06c5d854 |
9770 | parse_words: |
a2c1d768 |
9771 | for (i = wordc; i < ARRAY_SIZE(words); i++) |
9772 | words[i][0] = 0; |
cdfaeed7 |
9773 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
bfa4a6ee |
9774 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
91977a1c |
9775 | if (*p == 0 || *p == ';') { |
9776 | wordc++; |
9777 | break; |
9778 | } |
9779 | } |
a2c1d768 |
9780 | if (*p != 0 && *p != ';') |
9781 | aerr("too many words\n"); |
91977a1c |
9782 | |
11437ea1 |
9783 | if (skip_code_end) { |
9784 | skip_code_end = 0; |
9785 | skip_code = 0; |
9786 | } |
9787 | |
9788 | // allow asm patches in comments |
ddaf8bd7 |
9789 | if (*p == ';') { |
087ced53 |
9790 | // skip IDA's forced non-removable comment |
9791 | if (!IS_START(p, "; sct") && (p2 = strchr(p + 1, ';'))) |
9792 | p = p2; |
9793 | } |
9794 | if (*p == ';' && IS_START(p, "; sct")) { |
ddaf8bd7 |
9795 | if (IS_START(p, "; sctpatch:")) { |
9796 | p = sskip(p + 11); |
9797 | if (*p == 0 || *p == ';') |
9798 | continue; |
9799 | goto parse_words; // lame |
9800 | } |
46b388c2 |
9801 | else if (IS_START(p, "; sctend")) { |
9802 | end = 1; |
9803 | if (!pending_endp) |
9804 | break; |
9805 | } |
eadfb2b6 |
9806 | else if (g_skip_func) |
9807 | /* ignore remaining attrs */; |
9808 | else if (IS_START(p, "; sctproto:")) { |
9809 | sctproto = strdup(p + 11); |
9810 | } |
11437ea1 |
9811 | else if (IS_START(p, "; sctskip_start")) { |
eadfb2b6 |
9812 | if (in_func) { |
11437ea1 |
9813 | if (!skip_code) { |
9814 | ops[pi].op = OPP_ABORT; |
9815 | ops[pi].asmln = asmln; |
9816 | pi++; |
9817 | } |
9818 | skip_code = 1; |
9819 | } |
9820 | } |
9821 | else if (IS_START(p, "; sctskip_end")) { |
9822 | if (skip_code) |
9823 | skip_code_end = 1; |
9824 | } |
06c5d854 |
9825 | } |
9826 | |
91977a1c |
9827 | if (wordc == 0) { |
9828 | // shouldn't happen |
9829 | awarn("wordc == 0?\n"); |
9830 | continue; |
9831 | } |
9832 | |
9833 | // don't care about this: |
9834 | if (words[0][0] == '.' |
9835 | || IS(words[0], "include") |
9836 | || IS(words[0], "assume") || IS(words[1], "segment") |
9837 | || IS(words[0], "align")) |
9838 | { |
9839 | continue; |
9840 | } |
9841 | |
4c45fa73 |
9842 | do_pending_endp: |
9843 | // do delayed endp processing to collect switch jumptables |
9844 | if (pending_endp) { |
30c8c549 |
9845 | if (in_func && !g_skip_func && !end && wordc >= 2 |
4c45fa73 |
9846 | && ((words[0][0] == 'd' && words[0][2] == 0) |
9847 | || (words[1][0] == 'd' && words[1][2] == 0))) |
9848 | { |
9849 | i = 1; |
9850 | if (words[1][0] == 'd' && words[1][2] == 0) { |
9851 | // label |
9852 | if (g_func_pd_cnt >= pd_alloc) { |
9853 | pd_alloc = pd_alloc * 2 + 16; |
9854 | g_func_pd = realloc(g_func_pd, |
9855 | sizeof(g_func_pd[0]) * pd_alloc); |
9856 | my_assert_not(g_func_pd, NULL); |
9857 | } |
9858 | pd = &g_func_pd[g_func_pd_cnt]; |
9859 | g_func_pd_cnt++; |
9860 | memset(pd, 0, sizeof(*pd)); |
9861 | strcpy(pd->label, words[0]); |
9862 | pd->type = OPT_CONST; |
9863 | pd->lmod = lmod_from_directive(words[1]); |
9864 | i = 2; |
9865 | } |
9866 | else { |
da87ae38 |
9867 | if (pd == NULL) { |
9868 | if (verbose) |
9869 | anote("skipping alignment byte?\n"); |
9870 | continue; |
9871 | } |
4c45fa73 |
9872 | lmod = lmod_from_directive(words[0]); |
9873 | if (lmod != pd->lmod) |
9874 | aerr("lmod change? %d->%d\n", pd->lmod, lmod); |
9875 | } |
9876 | |
9877 | if (pd->count_alloc < pd->count + wordc) { |
9878 | pd->count_alloc = pd->count_alloc * 2 + 14 + wordc; |
9879 | pd->d = realloc(pd->d, sizeof(pd->d[0]) * pd->count_alloc); |
9880 | my_assert_not(pd->d, NULL); |
9881 | } |
9882 | for (; i < wordc; i++) { |
9883 | if (IS(words[i], "offset")) { |
9884 | pd->type = OPT_OFFSET; |
9885 | i++; |
9886 | } |
9887 | p = strchr(words[i], ','); |
9888 | if (p != NULL) |
9889 | *p = 0; |
9890 | if (pd->type == OPT_OFFSET) |
9891 | pd->d[pd->count].u.label = strdup(words[i]); |
9892 | else |
e27467d0 |
9893 | pd->d[pd->count].u.val = parse_number(words[i], 0); |
4c45fa73 |
9894 | pd->d[pd->count].bt_i = -1; |
9895 | pd->count++; |
9896 | } |
9897 | continue; |
9898 | } |
9899 | |
30c8c549 |
9900 | if (in_func && !g_skip_func) { |
9af2d373 |
9901 | if (g_header_mode) |
92d715b6 |
9902 | gen_hdr(g_func, pi); |
9903 | else |
9904 | gen_func(fout, g_fhdr, g_func, pi); |
9905 | } |
4c45fa73 |
9906 | |
9907 | pending_endp = 0; |
9908 | in_func = 0; |
9909 | g_ida_func_attr = 0; |
7e08c224 |
9910 | g_sct_func_attr = 0; |
9911 | g_stack_clear_start = 0; |
9912 | g_stack_clear_len = 0; |
226e8df1 |
9913 | g_regmask_init = 0; |
383dff16 |
9914 | g_regmask_rm = 0; |
4c45fa73 |
9915 | skip_warned = 0; |
30c8c549 |
9916 | g_skip_func = 0; |
4c45fa73 |
9917 | g_func[0] = 0; |
ba93cc12 |
9918 | g_seh_found = 0; |
e56ab892 |
9919 | func_chunks_used = 0; |
9920 | func_chunk_i = -1; |
4c45fa73 |
9921 | if (pi != 0) { |
9922 | memset(&ops, 0, pi * sizeof(ops[0])); |
d7857c3a |
9923 | clear_labels(pi); |
4c45fa73 |
9924 | pi = 0; |
9925 | } |
9926 | g_eqcnt = 0; |
9927 | for (i = 0; i < g_func_pd_cnt; i++) { |
9928 | pd = &g_func_pd[i]; |
9929 | if (pd->type == OPT_OFFSET) { |
9930 | for (j = 0; j < pd->count; j++) |
9931 | free(pd->d[j].u.label); |
9932 | } |
9933 | free(pd->d); |
9934 | pd->d = NULL; |
9935 | } |
9936 | g_func_pd_cnt = 0; |
d4a985bd |
9937 | g_func_lmods = 0; |
4c45fa73 |
9938 | pd = NULL; |
46b388c2 |
9939 | |
9940 | if (end) |
9941 | break; |
4c45fa73 |
9942 | if (wordc == 0) |
9943 | continue; |
9944 | } |
9945 | |
91977a1c |
9946 | if (IS(words[1], "proc")) { |
9947 | if (in_func) |
9948 | aerr("proc '%s' while in_func '%s'?\n", |
9949 | words[0], g_func); |
bfa4a6ee |
9950 | p = words[0]; |
ddaf8bd7 |
9951 | if (bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp)) |
30c8c549 |
9952 | g_skip_func = 1; |
91977a1c |
9953 | strcpy(g_func, words[0]); |
d4e3b5db |
9954 | set_label(0, words[0]); |
91977a1c |
9955 | in_func = 1; |
9956 | continue; |
9957 | } |
9958 | |
e56ab892 |
9959 | if (IS(words[1], "endp")) |
9960 | { |
91977a1c |
9961 | if (!in_func) |
9962 | aerr("endp '%s' while not in_func?\n", words[0]); |
9963 | if (!IS(g_func, words[0])) |
9964 | aerr("endp '%s' while in_func '%s'?\n", |
9965 | words[0], g_func); |
11437ea1 |
9966 | if (skip_code) |
9967 | aerr("endp '%s' while skipping code\n", words[0]); |
bfa4a6ee |
9968 | |
ddaf8bd7 |
9969 | if ((g_ida_func_attr & IDAFA_THUNK) && pi == 1 |
ba93cc12 |
9970 | && ops[0].op == OP_JMP && ops[0].operand[0].segment) |
ddaf8bd7 |
9971 | { |
9972 | // import jump |
30c8c549 |
9973 | g_skip_func = 1; |
ddaf8bd7 |
9974 | } |
9975 | |
30c8c549 |
9976 | if (!g_skip_func && func_chunks_used) { |
e56ab892 |
9977 | // start processing chunks |
9978 | struct chunk_item *ci, key = { g_func, 0 }; |
9979 | |
9980 | func_chunk_ret = ftell(fasm); |
de50b98b |
9981 | func_chunk_ret_ln = asmln; |
e56ab892 |
9982 | if (!func_chunks_sorted) { |
9983 | qsort(func_chunks, func_chunk_cnt, |
9984 | sizeof(func_chunks[0]), cmp_chunks); |
9985 | func_chunks_sorted = 1; |
9986 | } |
9987 | ci = bsearch(&key, func_chunks, func_chunk_cnt, |
9988 | sizeof(func_chunks[0]), cmp_chunks); |
9989 | if (ci == NULL) |
9990 | aerr("'%s' needs chunks, but none found\n", g_func); |
9991 | func_chunk_i = ci - func_chunks; |
9992 | for (; func_chunk_i > 0; func_chunk_i--) |
9993 | if (!IS(func_chunks[func_chunk_i - 1].name, g_func)) |
9994 | break; |
9995 | |
9996 | ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET); |
9997 | if (ret) |
9998 | aerr("seek failed for '%s' chunk #%d\n", g_func, func_chunk_i); |
de50b98b |
9999 | asmln = func_chunks[func_chunk_i].asmln; |
e56ab892 |
10000 | func_chunk_i++; |
10001 | continue; |
10002 | } |
4c45fa73 |
10003 | pending_endp = 1; |
91977a1c |
10004 | continue; |
10005 | } |
10006 | |
1f84f6b3 |
10007 | if (wordc == 2 && IS(words[1], "ends")) { |
46b388c2 |
10008 | if (!multi_seg) { |
10009 | end = 1; |
10010 | if (pending_endp) |
10011 | goto do_pending_endp; |
1f84f6b3 |
10012 | break; |
46b388c2 |
10013 | } |
1f84f6b3 |
10014 | |
10015 | // scan for next text segment |
5fa1256f |
10016 | while (my_fgets(line, sizeof(line), fasm)) { |
1f84f6b3 |
10017 | asmln++; |
10018 | p = sskip(line); |
10019 | if (*p == 0 || *p == ';') |
10020 | continue; |
10021 | |
10022 | if (strstr(p, "segment para public 'CODE' use32")) |
10023 | break; |
10024 | } |
10025 | |
10026 | continue; |
10027 | } |
a2c1d768 |
10028 | |
bfa4a6ee |
10029 | p = strchr(words[0], ':'); |
10030 | if (p != NULL) { |
d4e3b5db |
10031 | set_label(pi, words[0]); |
bfa4a6ee |
10032 | continue; |
10033 | } |
10034 | |
11437ea1 |
10035 | if (!in_func || g_skip_func || skip_code) { |
30c8c549 |
10036 | if (!skip_warned && !g_skip_func && g_labels[pi] != NULL) { |
bfa4a6ee |
10037 | if (verbose) |
10038 | anote("skipping from '%s'\n", g_labels[pi]); |
10039 | skip_warned = 1; |
10040 | } |
d7857c3a |
10041 | free(g_labels[pi]); |
10042 | g_labels[pi] = NULL; |
bfa4a6ee |
10043 | continue; |
10044 | } |
10045 | |
ddaf8bd7 |
10046 | if (wordc > 1 && IS(words[1], "=")) |
10047 | { |
91977a1c |
10048 | if (wordc != 5) |
10049 | aerr("unhandled equ, wc=%d\n", wordc); |
10050 | if (g_eqcnt >= eq_alloc) { |
10051 | eq_alloc *= 2; |
10052 | g_eqs = realloc(g_eqs, eq_alloc * sizeof(g_eqs[0])); |
10053 | my_assert_not(g_eqs, NULL); |
10054 | } |
10055 | |
10056 | len = strlen(words[0]); |
10057 | if (len > sizeof(g_eqs[0].name) - 1) |
10058 | aerr("equ name too long: %d\n", len); |
10059 | strcpy(g_eqs[g_eqcnt].name, words[0]); |
10060 | |
10061 | if (!IS(words[3], "ptr")) |
10062 | aerr("unhandled equ\n"); |
10063 | if (IS(words[2], "dword")) |
10064 | g_eqs[g_eqcnt].lmod = OPLM_DWORD; |
10065 | else if (IS(words[2], "word")) |
10066 | g_eqs[g_eqcnt].lmod = OPLM_WORD; |
10067 | else if (IS(words[2], "byte")) |
10068 | g_eqs[g_eqcnt].lmod = OPLM_BYTE; |
90307a99 |
10069 | else if (IS(words[2], "qword")) |
10070 | g_eqs[g_eqcnt].lmod = OPLM_QWORD; |
91977a1c |
10071 | else |
10072 | aerr("bad lmod: '%s'\n", words[2]); |
10073 | |
e27467d0 |
10074 | g_eqs[g_eqcnt].offset = parse_number(words[4], 0); |
91977a1c |
10075 | g_eqcnt++; |
10076 | continue; |
10077 | } |
10078 | |
10079 | if (pi >= ARRAY_SIZE(ops)) |
10080 | aerr("too many ops\n"); |
10081 | |
91977a1c |
10082 | parse_op(&ops[pi], words, wordc); |
ddaf8bd7 |
10083 | |
865f1aca |
10084 | ops[pi].datap = sctproto; |
10085 | sctproto = NULL; |
91977a1c |
10086 | pi++; |
91977a1c |
10087 | } |
10088 | |
9af2d373 |
10089 | if (g_header_mode) |
92d715b6 |
10090 | output_hdr(fout); |
10091 | |
91977a1c |
10092 | fclose(fout); |
10093 | fclose(fasm); |
06c5d854 |
10094 | fclose(g_fhdr); |
91977a1c |
10095 | |
10096 | return 0; |
c36e914d |
10097 | } |
91977a1c |
10098 | |
10099 | // vim:ts=2:shiftwidth=2:expandtab |