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. |
7 | */ |
8 | |
33c35af6 |
9 | #define _GNU_SOURCE |
c36e914d |
10 | #include <stdio.h> |
11 | #include <stdlib.h> |
12 | #include <string.h> |
13 | |
14 | #include "my_assert.h" |
15 | #include "my_str.h" |
9ea60b8d |
16 | #include "common.h" |
c36e914d |
17 | |
18 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) |
19 | #define IS(w, y) !strcmp(w, y) |
39b168b8 |
20 | #define IS_START(w, y) !strncmp(w, y, strlen(y)) |
c36e914d |
21 | |
22 | #include "protoparse.h" |
23 | |
06c5d854 |
24 | static const char *asmfn; |
c36e914d |
25 | static int asmln; |
06c5d854 |
26 | static FILE *g_fhdr; |
c36e914d |
27 | |
940e8e66 |
28 | #define anote(fmt, ...) \ |
29 | printf("%s:%d: note: " fmt, asmfn, asmln, ##__VA_ARGS__) |
c36e914d |
30 | #define awarn(fmt, ...) \ |
940e8e66 |
31 | printf("%s:%d: warning: " fmt, asmfn, asmln, ##__VA_ARGS__) |
c36e914d |
32 | #define aerr(fmt, ...) do { \ |
940e8e66 |
33 | printf("%s:%d: error: " fmt, asmfn, asmln, ##__VA_ARGS__); \ |
33c35af6 |
34 | fcloseall(); \ |
c36e914d |
35 | exit(1); \ |
36 | } while (0) |
37 | |
054f95b2 |
38 | #include "masm_tools.h" |
39 | |
69a3cdfc |
40 | enum op_flags { |
5e49b270 |
41 | OPF_RMD = (1 << 0), /* removed from code generation */ |
87bf6cec |
42 | OPF_DATA = (1 << 1), /* data processing - writes to dst opr */ |
43 | OPF_FLAGS = (1 << 2), /* sets flags */ |
5c024ef7 |
44 | OPF_JMP = (1 << 3), /* branch, call */ |
04abc5d6 |
45 | OPF_CJMP = (1 << 4), /* cond. branch (cc or jecxz/loop) */ |
5c024ef7 |
46 | OPF_CC = (1 << 5), /* uses flags */ |
47 | OPF_TAIL = (1 << 6), /* ret or tail call */ |
48 | OPF_RSAVE = (1 << 7), /* push/pop is local reg save/load */ |
49 | OPF_REP = (1 << 8), /* prefixed by rep */ |
50 | OPF_REPZ = (1 << 9), /* rep is repe/repz */ |
51 | OPF_REPNZ = (1 << 10), /* rep is repne/repnz */ |
9af2d373 |
52 | OPF_FARG = (1 << 11), /* push collected as func arg */ |
53 | OPF_FARGNR = (1 << 12), /* push collected as func arg (no reuse) */ |
54 | OPF_EBP_S = (1 << 13), /* ebp used as scratch here, not BP */ |
55 | OPF_DF = (1 << 14), /* DF flag set */ |
56 | OPF_ATAIL = (1 << 15), /* tail call with reused arg frame */ |
57 | OPF_32BIT = (1 << 16), /* 32bit division */ |
58 | OPF_LOCK = (1 << 17), /* op has lock prefix */ |
59 | OPF_VAPUSH = (1 << 18), /* vararg ptr push (as call arg) */ |
26677139 |
60 | OPF_DONE = (1 << 19), /* already fully handled by analysis */ |
25a330eb |
61 | OPF_PPUSH = (1 << 20), /* part of complex push-pop graph */ |
c36e914d |
62 | }; |
63 | |
64 | enum op_op { |
65 | OP_INVAL, |
33c35af6 |
66 | OP_NOP, |
c36e914d |
67 | OP_PUSH, |
68 | OP_POP, |
591721d7 |
69 | OP_LEAVE, |
c36e914d |
70 | OP_MOV, |
850c9265 |
71 | OP_LEA, |
72 | OP_MOVZX, |
73 | OP_MOVSX, |
108e9fe3 |
74 | OP_XCHG, |
850c9265 |
75 | OP_NOT, |
04abc5d6 |
76 | OP_XLAT, |
5101a5f9 |
77 | OP_CDQ, |
092f64e1 |
78 | OP_LODS, |
33c35af6 |
79 | OP_STOS, |
d4e3b5db |
80 | OP_MOVS, |
7ba45c34 |
81 | OP_CMPS, |
591721d7 |
82 | OP_SCAS, |
83 | OP_STD, |
84 | OP_CLD, |
c36e914d |
85 | OP_RET, |
86 | OP_ADD, |
91977a1c |
87 | OP_SUB, |
850c9265 |
88 | OP_AND, |
89 | OP_OR, |
90 | OP_XOR, |
91 | OP_SHL, |
92 | OP_SHR, |
93 | OP_SAR, |
04abc5d6 |
94 | OP_SHLD, |
3b2f4044 |
95 | OP_SHRD, |
d4e3b5db |
96 | OP_ROL, |
97 | OP_ROR, |
cb090db0 |
98 | OP_RCL, |
99 | OP_RCR, |
69a3cdfc |
100 | OP_ADC, |
850c9265 |
101 | OP_SBB, |
1f84f6b3 |
102 | OP_BSF, |
850c9265 |
103 | OP_INC, |
104 | OP_DEC, |
5101a5f9 |
105 | OP_NEG, |
850c9265 |
106 | OP_MUL, |
107 | OP_IMUL, |
5101a5f9 |
108 | OP_DIV, |
109 | OP_IDIV, |
c36e914d |
110 | OP_TEST, |
111 | OP_CMP, |
112 | OP_CALL, |
113 | OP_JMP, |
5c024ef7 |
114 | OP_JECXZ, |
04abc5d6 |
115 | OP_LOOP, |
092f64e1 |
116 | OP_JCC, |
117 | OP_SCC, |
90307a99 |
118 | // x87 |
119 | // mmx |
120 | OP_EMMS, |
30c8c549 |
121 | // undefined |
2c10ea1f |
122 | OP_UD2, |
c36e914d |
123 | }; |
124 | |
125 | enum opr_type { |
87bf6cec |
126 | OPT_UNSPEC, |
127 | OPT_REG, |
128 | OPT_REGMEM, |
129 | OPT_LABEL, |
850c9265 |
130 | OPT_OFFSET, |
87bf6cec |
131 | OPT_CONST, |
c36e914d |
132 | }; |
133 | |
2b43685d |
134 | // must be sorted (larger len must be further in enum) |
c36e914d |
135 | enum opr_lenmod { |
91977a1c |
136 | OPLM_UNSPEC, |
137 | OPLM_BYTE, |
138 | OPLM_WORD, |
139 | OPLM_DWORD, |
90307a99 |
140 | OPLM_QWORD, |
c36e914d |
141 | }; |
142 | |
e83ea7ed |
143 | #define MAX_EXITS 128 |
144 | |
850c9265 |
145 | #define MAX_OPERANDS 3 |
92d715b6 |
146 | #define NAMELEN 112 |
c36e914d |
147 | |
148 | struct parsed_opr { |
91977a1c |
149 | enum opr_type type; |
150 | enum opr_lenmod lmod; |
7ba45c34 |
151 | unsigned int is_ptr:1; // pointer in C |
152 | unsigned int is_array:1; // array in C |
a3684be1 |
153 | unsigned int type_from_var:1; // .. in header, sometimes wrong |
2b43685d |
154 | unsigned int size_mismatch:1; // type override differs from C |
155 | unsigned int size_lt:1; // type override is larger than C |
ddaf8bd7 |
156 | unsigned int had_ds:1; // had ds: prefix |
c7ed83dd |
157 | const struct parsed_proto *pp; // for OPT_LABEL |
91977a1c |
158 | int reg; |
159 | unsigned int val; |
92d715b6 |
160 | char name[NAMELEN]; |
c36e914d |
161 | }; |
162 | |
163 | struct parsed_op { |
91977a1c |
164 | enum op_op op; |
165 | struct parsed_opr operand[MAX_OPERANDS]; |
69a3cdfc |
166 | unsigned int flags; |
092f64e1 |
167 | unsigned char pfo; |
168 | unsigned char pfo_inv; |
169 | unsigned char operand_cnt; |
3a5101d7 |
170 | unsigned char p_argnum; // arg push: altered before call arg # |
171 | unsigned char p_arggrp; // arg push: arg group # for above |
172 | unsigned char p_argpass;// arg push: arg of host func |
173 | short p_argnext;// arg push: same arg pushed elsewhere or -1 |
69a3cdfc |
174 | int regmask_src; // all referensed regs |
175 | int regmask_dst; |
940e8e66 |
176 | int pfomask; // flagop: parsed_flag_op that can't be delayed |
940e8e66 |
177 | int cc_scratch; // scratch storage during analysis |
4c45fa73 |
178 | int bt_i; // branch target for branches |
179 | struct parsed_data *btj;// branch targets for jumptables |
c7ed83dd |
180 | struct parsed_proto *pp;// parsed_proto for OP_CALL |
91977a1c |
181 | void *datap; |
8eb12e72 |
182 | int asmln; |
91977a1c |
183 | }; |
184 | |
69a3cdfc |
185 | // datap: |
25a330eb |
186 | // OP_CALL - parser proto hint (str) |
2c10ea1f |
187 | // (OPF_CC) - points to one of (OPF_FLAGS) that affects cc op |
25a330eb |
188 | // OP_PUSH - points to OP_POP in complex push/pop graph |
189 | // OP_POP - points to OP_PUSH in simple push/pop pair |
69a3cdfc |
190 | |
91977a1c |
191 | struct parsed_equ { |
192 | char name[64]; |
193 | enum opr_lenmod lmod; |
194 | int offset; |
c36e914d |
195 | }; |
196 | |
4c45fa73 |
197 | struct parsed_data { |
198 | char label[256]; |
199 | enum opr_type type; |
200 | enum opr_lenmod lmod; |
201 | int count; |
202 | int count_alloc; |
203 | struct { |
204 | union { |
205 | char *label; |
63df67be |
206 | unsigned int val; |
4c45fa73 |
207 | } u; |
208 | int bt_i; |
209 | } *d; |
210 | }; |
211 | |
212 | struct label_ref { |
213 | int i; |
214 | struct label_ref *next; |
215 | }; |
216 | |
1bafb621 |
217 | enum ida_func_attr { |
218 | IDAFA_BP_FRAME = (1 << 0), |
219 | IDAFA_LIB_FUNC = (1 << 1), |
220 | IDAFA_STATIC = (1 << 2), |
221 | IDAFA_NORETURN = (1 << 3), |
222 | IDAFA_THUNK = (1 << 4), |
223 | IDAFA_FPD = (1 << 5), |
224 | }; |
225 | |
3a5101d7 |
226 | // note: limited to 32k due to p_argnext |
227 | #define MAX_OPS 4096 |
228 | #define MAX_ARG_GRP 2 |
c36e914d |
229 | |
230 | static struct parsed_op ops[MAX_OPS]; |
91977a1c |
231 | static struct parsed_equ *g_eqs; |
232 | static int g_eqcnt; |
d7857c3a |
233 | static char *g_labels[MAX_OPS]; |
4c45fa73 |
234 | static struct label_ref g_label_refs[MAX_OPS]; |
bd96f656 |
235 | static const struct parsed_proto *g_func_pp; |
4c45fa73 |
236 | static struct parsed_data *g_func_pd; |
237 | static int g_func_pd_cnt; |
91977a1c |
238 | static char g_func[256]; |
239 | static char g_comment[256]; |
240 | static int g_bp_frame; |
1bafb621 |
241 | static int g_sp_frame; |
a2c1d768 |
242 | static int g_stack_frame_used; |
1bafb621 |
243 | static int g_stack_fsz; |
4c45fa73 |
244 | static int g_ida_func_attr; |
30c8c549 |
245 | static int g_skip_func; |
89ff3147 |
246 | static int g_allow_regfunc; |
92d715b6 |
247 | static int g_quiet_pp; |
9af2d373 |
248 | static int g_header_mode; |
92d715b6 |
249 | |
91977a1c |
250 | #define ferr(op_, fmt, ...) do { \ |
bfacdc83 |
251 | printf("%s:%d: error %u: [%s] '%s': " fmt, asmfn, (op_)->asmln, \ |
252 | __LINE__, g_func, dump_op(op_), ##__VA_ARGS__); \ |
33c35af6 |
253 | fcloseall(); \ |
91977a1c |
254 | exit(1); \ |
255 | } while (0) |
de50b98b |
256 | #define fnote(op_, fmt, ...) \ |
8eb12e72 |
257 | printf("%s:%d: note: [%s] '%s': " fmt, asmfn, (op_)->asmln, g_func, \ |
de50b98b |
258 | dump_op(op_), ##__VA_ARGS__) |
91977a1c |
259 | |
26677139 |
260 | #define ferr_assert(op_, cond) do { \ |
2b70f6d3 |
261 | if (!(cond)) ferr(op_, "assertion '%s' failed\n", #cond); \ |
26677139 |
262 | } while (0) |
263 | |
90307a99 |
264 | const char *regs_r32[] = { |
265 | "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp", |
266 | // not r32, but list here for easy parsing and printing |
267 | "mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7", |
268 | }; |
91977a1c |
269 | const char *regs_r16[] = { "ax", "bx", "cx", "dx", "si", "di", "bp", "sp" }; |
270 | const char *regs_r8l[] = { "al", "bl", "cl", "dl" }; |
271 | const char *regs_r8h[] = { "ah", "bh", "ch", "dh" }; |
272 | |
273 | enum x86_regs { xUNSPEC = -1, xAX, xBX, xCX, xDX, xSI, xDI, xBP, xSP }; |
274 | |
69a3cdfc |
275 | // possible basic comparison types (without inversion) |
276 | enum parsed_flag_op { |
277 | PFO_O, // 0 OF=1 |
278 | PFO_C, // 2 CF=1 |
279 | PFO_Z, // 4 ZF=1 |
280 | PFO_BE, // 6 CF=1||ZF=1 |
281 | PFO_S, // 8 SF=1 |
282 | PFO_P, // a PF=1 |
283 | PFO_L, // c SF!=OF |
284 | PFO_LE, // e ZF=1||SF!=OF |
285 | }; |
286 | |
90307a99 |
287 | #define PFOB_O (1 << PFO_O) |
288 | #define PFOB_C (1 << PFO_C) |
289 | #define PFOB_Z (1 << PFO_Z) |
290 | #define PFOB_S (1 << PFO_S) |
291 | |
69a3cdfc |
292 | static const char *parsed_flag_op_names[] = { |
293 | "o", "c", "z", "be", "s", "p", "l", "le" |
294 | }; |
295 | |
91977a1c |
296 | static int char_array_i(const char *array[], size_t len, const char *s) |
297 | { |
298 | int i; |
c36e914d |
299 | |
91977a1c |
300 | for (i = 0; i < len; i++) |
301 | if (IS(s, array[i])) |
302 | return i; |
c36e914d |
303 | |
91977a1c |
304 | return -1; |
305 | } |
306 | |
63df67be |
307 | static void printf_number(char *buf, size_t buf_size, |
308 | unsigned long number) |
91977a1c |
309 | { |
5101a5f9 |
310 | // output in C-friendly form |
311 | snprintf(buf, buf_size, number < 10 ? "%lu" : "0x%02lx", number); |
312 | } |
91977a1c |
313 | |
fdd5548a |
314 | static int check_segment_prefix(const char *s) |
315 | { |
316 | if (s[0] == 0 || s[1] != 's' || s[2] != ':') |
317 | return 0; |
318 | |
319 | switch (s[0]) { |
320 | case 'c': return 1; |
321 | case 'd': return 2; |
322 | case 's': return 3; |
323 | case 'e': return 4; |
324 | case 'f': return 5; |
325 | case 'g': return 6; |
326 | default: return 0; |
327 | } |
328 | } |
329 | |
5101a5f9 |
330 | static int parse_reg(enum opr_lenmod *reg_lmod, const char *s) |
331 | { |
332 | int reg; |
91977a1c |
333 | |
5101a5f9 |
334 | reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s); |
90307a99 |
335 | if (reg >= 8) { |
336 | *reg_lmod = OPLM_QWORD; |
337 | return reg; |
338 | } |
5101a5f9 |
339 | if (reg >= 0) { |
340 | *reg_lmod = OPLM_DWORD; |
341 | return reg; |
91977a1c |
342 | } |
5101a5f9 |
343 | reg = char_array_i(regs_r16, ARRAY_SIZE(regs_r16), s); |
344 | if (reg >= 0) { |
345 | *reg_lmod = OPLM_WORD; |
346 | return reg; |
347 | } |
348 | reg = char_array_i(regs_r8h, ARRAY_SIZE(regs_r8h), s); |
349 | if (reg >= 0) { |
350 | *reg_lmod = OPLM_BYTE; |
351 | return reg; |
352 | } |
353 | reg = char_array_i(regs_r8l, ARRAY_SIZE(regs_r8l), s); |
354 | if (reg >= 0) { |
355 | *reg_lmod = OPLM_BYTE; |
356 | return reg; |
850c9265 |
357 | } |
358 | |
359 | return -1; |
91977a1c |
360 | } |
361 | |
5101a5f9 |
362 | static int parse_indmode(char *name, int *regmask, int need_c_cvt) |
363 | { |
364 | enum opr_lenmod lmod; |
365 | char cvtbuf[256]; |
366 | char *d = cvtbuf; |
367 | char *s = name; |
368 | char w[64]; |
369 | long number; |
370 | int reg; |
371 | int c = 0; |
372 | |
373 | *d = 0; |
374 | |
375 | while (*s != 0) { |
376 | d += strlen(d); |
377 | while (my_isblank(*s)) |
378 | s++; |
379 | for (; my_issep(*s); d++, s++) |
380 | *d = *s; |
381 | while (my_isblank(*s)) |
382 | s++; |
383 | *d = 0; |
384 | |
fdd5548a |
385 | // skip '?s:' prefixes |
386 | if (check_segment_prefix(s)) |
87bf6cec |
387 | s += 3; |
388 | |
5101a5f9 |
389 | s = next_idt(w, sizeof(w), s); |
390 | if (w[0] == 0) |
391 | break; |
392 | c++; |
393 | |
394 | reg = parse_reg(&lmod, w); |
395 | if (reg >= 0) { |
396 | *regmask |= 1 << reg; |
397 | goto pass; |
398 | } |
399 | |
400 | if ('0' <= w[0] && w[0] <= '9') { |
401 | number = parse_number(w); |
402 | printf_number(d, sizeof(cvtbuf) - (d - cvtbuf), number); |
403 | continue; |
404 | } |
405 | |
406 | // probably some label/identifier - pass |
407 | |
408 | pass: |
409 | snprintf(d, sizeof(cvtbuf) - (d - cvtbuf), "%s", w); |
410 | } |
411 | |
412 | if (need_c_cvt) |
413 | strcpy(name, cvtbuf); |
414 | |
415 | return c; |
416 | } |
417 | |
4c45fa73 |
418 | static int is_reg_in_str(const char *s) |
419 | { |
420 | int i; |
421 | |
422 | if (strlen(s) < 3 || (s[3] && !my_issep(s[3]) && !my_isblank(s[3]))) |
423 | return 0; |
424 | |
425 | for (i = 0; i < ARRAY_SIZE(regs_r32); i++) |
426 | if (!strncmp(s, regs_r32[i], 3)) |
427 | return 1; |
428 | |
429 | return 0; |
430 | } |
431 | |
09bc6fd5 |
432 | static const char *parse_stack_el(const char *name, char *extra_reg, |
433 | int early_try) |
d4e3b5db |
434 | { |
4c45fa73 |
435 | const char *p, *p2, *s; |
1bafb621 |
436 | char *endp = NULL; |
d4e3b5db |
437 | char buf[32]; |
1bafb621 |
438 | long val; |
d4e3b5db |
439 | int len; |
440 | |
09bc6fd5 |
441 | if (g_bp_frame || early_try) |
442 | { |
443 | p = name; |
444 | if (IS_START(p + 3, "+ebp+") && is_reg_in_str(p)) { |
445 | p += 4; |
446 | if (extra_reg != NULL) { |
447 | strncpy(extra_reg, name, 3); |
448 | extra_reg[4] = 0; |
449 | } |
4c45fa73 |
450 | } |
4c45fa73 |
451 | |
09bc6fd5 |
452 | if (IS_START(p, "ebp+")) { |
453 | p += 4; |
4c45fa73 |
454 | |
09bc6fd5 |
455 | p2 = strchr(p, '+'); |
456 | if (p2 != NULL && is_reg_in_str(p)) { |
457 | if (extra_reg != NULL) { |
458 | strncpy(extra_reg, p, p2 - p); |
459 | extra_reg[p2 - p] = 0; |
460 | } |
461 | p = p2 + 1; |
4c45fa73 |
462 | } |
4c45fa73 |
463 | |
09bc6fd5 |
464 | if (!('0' <= *p && *p <= '9')) |
465 | return p; |
4c45fa73 |
466 | |
09bc6fd5 |
467 | return NULL; |
468 | } |
4c45fa73 |
469 | } |
470 | |
39b168b8 |
471 | if (!IS_START(name, "esp+")) |
d4e3b5db |
472 | return NULL; |
473 | |
037f4971 |
474 | s = name + 4; |
475 | p = strchr(s, '+'); |
d4e3b5db |
476 | if (p) { |
037f4971 |
477 | if (is_reg_in_str(s)) { |
478 | if (extra_reg != NULL) { |
479 | strncpy(extra_reg, s, p - s); |
480 | extra_reg[p - s] = 0; |
481 | } |
482 | s = p + 1; |
483 | p = strchr(s, '+'); |
484 | if (p == NULL) |
485 | aerr("%s IDA stackvar not set?\n", __func__); |
486 | } |
1bafb621 |
487 | if (!('0' <= *s && *s <= '9')) { |
037f4971 |
488 | aerr("%s IDA stackvar offset not set?\n", __func__); |
d4e3b5db |
489 | return NULL; |
1bafb621 |
490 | } |
491 | if (s[0] == '0' && s[1] == 'x') |
492 | s += 2; |
493 | len = p - s; |
d4e3b5db |
494 | if (len < sizeof(buf) - 1) { |
1bafb621 |
495 | strncpy(buf, s, len); |
d4e3b5db |
496 | buf[len] = 0; |
1bafb621 |
497 | val = strtol(buf, &endp, 16); |
498 | if (val == 0 || *endp != 0) { |
499 | aerr("%s num parse fail for '%s'\n", __func__, buf); |
500 | return NULL; |
501 | } |
d4e3b5db |
502 | } |
503 | p++; |
504 | } |
505 | else |
506 | p = name + 4; |
507 | |
508 | if ('0' <= *p && *p <= '9') |
509 | return NULL; |
510 | |
511 | return p; |
512 | } |
513 | |
850c9265 |
514 | static int guess_lmod_from_name(struct parsed_opr *opr) |
515 | { |
04abc5d6 |
516 | if (IS_START(opr->name, "dword_") || IS_START(opr->name, "off_")) { |
850c9265 |
517 | opr->lmod = OPLM_DWORD; |
518 | return 1; |
519 | } |
04abc5d6 |
520 | if (IS_START(opr->name, "word_")) { |
850c9265 |
521 | opr->lmod = OPLM_WORD; |
522 | return 1; |
523 | } |
04abc5d6 |
524 | if (IS_START(opr->name, "byte_")) { |
850c9265 |
525 | opr->lmod = OPLM_BYTE; |
526 | return 1; |
527 | } |
04abc5d6 |
528 | if (IS_START(opr->name, "qword_")) { |
90307a99 |
529 | opr->lmod = OPLM_QWORD; |
530 | return 1; |
531 | } |
850c9265 |
532 | return 0; |
533 | } |
534 | |
3ebea2cf |
535 | static int guess_lmod_from_c_type(enum opr_lenmod *lmod, |
536 | const struct parsed_type *c_type) |
06c5d854 |
537 | { |
06c5d854 |
538 | static const char *dword_types[] = { |
c0de9015 |
539 | "uint32_t", "int", "_DWORD", "UINT_PTR", "DWORD", |
4741fdfe |
540 | "WPARAM", "LPARAM", "UINT", "__int32", |
09bc6fd5 |
541 | "LONG", "HIMC", "BOOL", "size_t", |
feb0ee5d |
542 | "float", |
06c5d854 |
543 | }; |
544 | static const char *word_types[] = { |
fe18709a |
545 | "uint16_t", "int16_t", "_WORD", "WORD", |
2b43685d |
546 | "unsigned __int16", "__int16", |
06c5d854 |
547 | }; |
548 | static const char *byte_types[] = { |
2b43685d |
549 | "uint8_t", "int8_t", "char", |
89ff3147 |
550 | "unsigned __int8", "__int8", "BYTE", "_BYTE", |
4741fdfe |
551 | "CHAR", "_UNKNOWN", |
b4878d2b |
552 | // structures.. deal the same as with _UNKNOWN for now |
553 | "CRITICAL_SECTION", |
06c5d854 |
554 | }; |
3ebea2cf |
555 | const char *n; |
06c5d854 |
556 | int i; |
557 | |
3ebea2cf |
558 | if (c_type->is_ptr) { |
559 | *lmod = OPLM_DWORD; |
06c5d854 |
560 | return 1; |
561 | } |
562 | |
3ebea2cf |
563 | n = skip_type_mod(c_type->name); |
06c5d854 |
564 | |
3ebea2cf |
565 | for (i = 0; i < ARRAY_SIZE(dword_types); i++) { |
566 | if (IS(n, dword_types[i])) { |
567 | *lmod = OPLM_DWORD; |
06c5d854 |
568 | return 1; |
569 | } |
570 | } |
571 | |
572 | for (i = 0; i < ARRAY_SIZE(word_types); i++) { |
3ebea2cf |
573 | if (IS(n, word_types[i])) { |
574 | *lmod = OPLM_WORD; |
06c5d854 |
575 | return 1; |
576 | } |
577 | } |
578 | |
579 | for (i = 0; i < ARRAY_SIZE(byte_types); i++) { |
3ebea2cf |
580 | if (IS(n, byte_types[i])) { |
581 | *lmod = OPLM_BYTE; |
06c5d854 |
582 | return 1; |
583 | } |
584 | } |
585 | |
06c5d854 |
586 | return 0; |
587 | } |
588 | |
c7ed83dd |
589 | static char *default_cast_to(char *buf, size_t buf_size, |
590 | struct parsed_opr *opr) |
591 | { |
592 | buf[0] = 0; |
593 | |
594 | if (!opr->is_ptr) |
595 | return buf; |
596 | if (opr->pp == NULL || opr->pp->type.name == NULL |
597 | || opr->pp->is_fptr) |
598 | { |
599 | snprintf(buf, buf_size, "%s", "(void *)"); |
600 | return buf; |
601 | } |
602 | |
603 | snprintf(buf, buf_size, "(%s)", opr->pp->type.name); |
604 | return buf; |
605 | } |
606 | |
4c45fa73 |
607 | static enum opr_type lmod_from_directive(const char *d) |
608 | { |
609 | if (IS(d, "dd")) |
610 | return OPLM_DWORD; |
611 | else if (IS(d, "dw")) |
612 | return OPLM_WORD; |
613 | else if (IS(d, "db")) |
614 | return OPLM_BYTE; |
615 | |
616 | aerr("unhandled directive: '%s'\n", d); |
617 | return OPLM_UNSPEC; |
618 | } |
619 | |
5101a5f9 |
620 | static void setup_reg_opr(struct parsed_opr *opr, int reg, enum opr_lenmod lmod, |
621 | int *regmask) |
622 | { |
623 | opr->type = OPT_REG; |
624 | opr->reg = reg; |
625 | opr->lmod = lmod; |
626 | *regmask |= 1 << reg; |
627 | } |
628 | |
39b168b8 |
629 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
630 | int *extra_offs); |
87bf6cec |
631 | |
69a3cdfc |
632 | static int parse_operand(struct parsed_opr *opr, |
633 | int *regmask, int *regmask_indirect, |
1bafb621 |
634 | char words[16][256], int wordc, int w, unsigned int op_flags) |
c36e914d |
635 | { |
92d715b6 |
636 | const struct parsed_proto *pp = NULL; |
850c9265 |
637 | enum opr_lenmod tmplmod; |
63df67be |
638 | unsigned long number; |
89ff3147 |
639 | char buf[256]; |
850c9265 |
640 | int ret, len; |
1bafb621 |
641 | int wordc_in; |
89ff3147 |
642 | char *p; |
850c9265 |
643 | int i; |
c36e914d |
644 | |
1bafb621 |
645 | if (w >= wordc) |
646 | aerr("parse_operand w %d, wordc %d\n", w, wordc); |
c36e914d |
647 | |
1bafb621 |
648 | opr->reg = xUNSPEC; |
91977a1c |
649 | |
1bafb621 |
650 | for (i = w; i < wordc; i++) { |
651 | len = strlen(words[i]); |
652 | if (words[i][len - 1] == ',') { |
653 | words[i][len - 1] = 0; |
654 | wordc = i + 1; |
655 | break; |
656 | } |
657 | } |
c36e914d |
658 | |
1bafb621 |
659 | wordc_in = wordc - w; |
c36e914d |
660 | |
1bafb621 |
661 | if ((op_flags & OPF_JMP) && wordc_in > 0 |
662 | && !('0' <= words[w][0] && words[w][0] <= '9')) |
663 | { |
664 | const char *label = NULL; |
665 | |
666 | if (wordc_in == 3 && !strncmp(words[w], "near", 4) |
667 | && IS(words[w + 1], "ptr")) |
668 | label = words[w + 2]; |
669 | else if (wordc_in == 2 && IS(words[w], "short")) |
670 | label = words[w + 1]; |
671 | else if (wordc_in == 1 |
672 | && strchr(words[w], '[') == NULL |
673 | && parse_reg(&tmplmod, words[w]) < 0) |
674 | label = words[w]; |
675 | |
676 | if (label != NULL) { |
677 | opr->type = OPT_LABEL; |
fdd5548a |
678 | ret = check_segment_prefix(label); |
679 | if (ret != 0) { |
680 | if (ret >= 5) |
681 | aerr("fs/gs used\n"); |
ddaf8bd7 |
682 | opr->had_ds = 1; |
39b168b8 |
683 | label += 3; |
ddaf8bd7 |
684 | } |
1bafb621 |
685 | strcpy(opr->name, label); |
686 | return wordc; |
687 | } |
688 | } |
c36e914d |
689 | |
1bafb621 |
690 | if (wordc_in >= 3) { |
691 | if (IS(words[w + 1], "ptr")) { |
692 | if (IS(words[w], "dword")) |
693 | opr->lmod = OPLM_DWORD; |
694 | else if (IS(words[w], "word")) |
695 | opr->lmod = OPLM_WORD; |
696 | else if (IS(words[w], "byte")) |
697 | opr->lmod = OPLM_BYTE; |
90307a99 |
698 | else if (IS(words[w], "qword")) |
699 | opr->lmod = OPLM_QWORD; |
1bafb621 |
700 | else |
701 | aerr("type parsing failed\n"); |
702 | w += 2; |
703 | wordc_in = wordc - w; |
704 | } |
705 | } |
706 | |
39b168b8 |
707 | if (wordc_in == 2) { |
708 | if (IS(words[w], "offset")) { |
709 | opr->type = OPT_OFFSET; |
27ebfaed |
710 | opr->lmod = OPLM_DWORD; |
39b168b8 |
711 | strcpy(opr->name, words[w + 1]); |
27ebfaed |
712 | pp = proto_parse(g_fhdr, opr->name, 1); |
713 | goto do_label; |
39b168b8 |
714 | } |
715 | if (IS(words[w], "(offset")) { |
89ff3147 |
716 | p = strchr(words[w + 1], ')'); |
39b168b8 |
717 | if (p == NULL) |
718 | aerr("parse of bracketed offset failed\n"); |
719 | *p = 0; |
720 | opr->type = OPT_OFFSET; |
721 | strcpy(opr->name, words[w + 1]); |
722 | return wordc; |
723 | } |
1bafb621 |
724 | } |
c36e914d |
725 | |
1bafb621 |
726 | if (wordc_in != 1) |
850c9265 |
727 | aerr("parse_operand 1 word expected\n"); |
c36e914d |
728 | |
fdd5548a |
729 | ret = check_segment_prefix(words[w]); |
730 | if (ret != 0) { |
731 | if (ret >= 5) |
732 | aerr("fs/gs used\n"); |
ddaf8bd7 |
733 | opr->had_ds = 1; |
89ff3147 |
734 | memmove(words[w], words[w] + 3, strlen(words[w]) - 2); |
ddaf8bd7 |
735 | } |
89ff3147 |
736 | strcpy(opr->name, words[w]); |
c36e914d |
737 | |
850c9265 |
738 | if (words[w][0] == '[') { |
739 | opr->type = OPT_REGMEM; |
740 | ret = sscanf(words[w], "[%[^]]]", opr->name); |
741 | if (ret != 1) |
742 | aerr("[] parse failure\n"); |
87bf6cec |
743 | |
5101a5f9 |
744 | parse_indmode(opr->name, regmask_indirect, 1); |
09bc6fd5 |
745 | if (opr->lmod == OPLM_UNSPEC && parse_stack_el(opr->name, NULL, 1)) |
746 | { |
87bf6cec |
747 | // might be an equ |
d4e3b5db |
748 | struct parsed_equ *eq = |
09bc6fd5 |
749 | equ_find(NULL, parse_stack_el(opr->name, NULL, 1), &i); |
87bf6cec |
750 | if (eq) |
751 | opr->lmod = eq->lmod; |
752 | } |
850c9265 |
753 | return wordc; |
754 | } |
755 | else if (strchr(words[w], '[')) { |
756 | // label[reg] form |
89ff3147 |
757 | p = strchr(words[w], '['); |
850c9265 |
758 | opr->type = OPT_REGMEM; |
89ff3147 |
759 | parse_indmode(p, regmask_indirect, 0); |
760 | strncpy(buf, words[w], p - words[w]); |
761 | buf[p - words[w]] = 0; |
762 | pp = proto_parse(g_fhdr, buf, 1); |
763 | goto do_label; |
850c9265 |
764 | } |
765 | else if (('0' <= words[w][0] && words[w][0] <= '9') |
766 | || words[w][0] == '-') |
767 | { |
5101a5f9 |
768 | number = parse_number(words[w]); |
91977a1c |
769 | opr->type = OPT_CONST; |
5101a5f9 |
770 | opr->val = number; |
771 | printf_number(opr->name, sizeof(opr->name), number); |
91977a1c |
772 | return wordc; |
850c9265 |
773 | } |
c36e914d |
774 | |
5101a5f9 |
775 | ret = parse_reg(&tmplmod, opr->name); |
776 | if (ret >= 0) { |
777 | setup_reg_opr(opr, ret, tmplmod, regmask); |
850c9265 |
778 | return wordc; |
779 | } |
780 | |
781 | // most likely var in data segment |
782 | opr->type = OPT_LABEL; |
92d715b6 |
783 | pp = proto_parse(g_fhdr, opr->name, g_quiet_pp); |
89ff3147 |
784 | |
785 | do_label: |
bd96f656 |
786 | if (pp != NULL) { |
1cd4a663 |
787 | if (pp->is_fptr || pp->is_func) { |
06c5d854 |
788 | opr->lmod = OPLM_DWORD; |
789 | opr->is_ptr = 1; |
790 | } |
2b43685d |
791 | else { |
840257f6 |
792 | tmplmod = OPLM_UNSPEC; |
bd96f656 |
793 | if (!guess_lmod_from_c_type(&tmplmod, &pp->type)) |
2b43685d |
794 | anote("unhandled C type '%s' for '%s'\n", |
bd96f656 |
795 | pp->type.name, opr->name); |
2b43685d |
796 | |
a3684be1 |
797 | if (opr->lmod == OPLM_UNSPEC) { |
2b43685d |
798 | opr->lmod = tmplmod; |
a3684be1 |
799 | opr->type_from_var = 1; |
800 | } |
2b43685d |
801 | else if (opr->lmod != tmplmod) { |
802 | opr->size_mismatch = 1; |
803 | if (tmplmod < opr->lmod) |
804 | opr->size_lt = 1; |
805 | } |
a652aa9f |
806 | opr->is_ptr = pp->type.is_ptr; |
3ebea2cf |
807 | } |
bd96f656 |
808 | opr->is_array = pp->type.is_array; |
06c5d854 |
809 | } |
c7ed83dd |
810 | opr->pp = pp; |
06c5d854 |
811 | |
850c9265 |
812 | if (opr->lmod == OPLM_UNSPEC) |
813 | guess_lmod_from_name(opr); |
850c9265 |
814 | return wordc; |
c36e914d |
815 | } |
816 | |
33c35af6 |
817 | static const struct { |
818 | const char *name; |
819 | unsigned int flags; |
820 | } pref_table[] = { |
821 | { "rep", OPF_REP }, |
7ba45c34 |
822 | { "repe", OPF_REP|OPF_REPZ }, |
823 | { "repz", OPF_REP|OPF_REPZ }, |
824 | { "repne", OPF_REP|OPF_REPNZ }, |
825 | { "repnz", OPF_REP|OPF_REPNZ }, |
037f4971 |
826 | { "lock", OPF_LOCK }, // ignored for now.. |
33c35af6 |
827 | }; |
828 | |
5c024ef7 |
829 | #define OPF_CJMP_CC (OPF_JMP|OPF_CJMP|OPF_CC) |
830 | |
c36e914d |
831 | static const struct { |
850c9265 |
832 | const char *name; |
833 | enum op_op op; |
092f64e1 |
834 | unsigned short minopr; |
835 | unsigned short maxopr; |
69a3cdfc |
836 | unsigned int flags; |
092f64e1 |
837 | unsigned char pfo; |
838 | unsigned char pfo_inv; |
c36e914d |
839 | } op_table[] = { |
33c35af6 |
840 | { "nop", OP_NOP, 0, 0, 0 }, |
69a3cdfc |
841 | { "push", OP_PUSH, 1, 1, 0 }, |
842 | { "pop", OP_POP, 1, 1, OPF_DATA }, |
591721d7 |
843 | { "leave",OP_LEAVE, 0, 0, OPF_DATA }, |
69a3cdfc |
844 | { "mov" , OP_MOV, 2, 2, OPF_DATA }, |
845 | { "lea", OP_LEA, 2, 2, OPF_DATA }, |
846 | { "movzx",OP_MOVZX, 2, 2, OPF_DATA }, |
847 | { "movsx",OP_MOVSX, 2, 2, OPF_DATA }, |
108e9fe3 |
848 | { "xchg", OP_XCHG, 2, 2, OPF_DATA }, |
69a3cdfc |
849 | { "not", OP_NOT, 1, 1, OPF_DATA }, |
04abc5d6 |
850 | { "xlat", OP_XLAT, 0, 0, OPF_DATA }, |
5101a5f9 |
851 | { "cdq", OP_CDQ, 0, 0, OPF_DATA }, |
092f64e1 |
852 | { "lodsb",OP_LODS, 0, 0, OPF_DATA }, |
853 | { "lodsw",OP_LODS, 0, 0, OPF_DATA }, |
854 | { "lodsd",OP_LODS, 0, 0, OPF_DATA }, |
33c35af6 |
855 | { "stosb",OP_STOS, 0, 0, OPF_DATA }, |
856 | { "stosw",OP_STOS, 0, 0, OPF_DATA }, |
857 | { "stosd",OP_STOS, 0, 0, OPF_DATA }, |
d4e3b5db |
858 | { "movsb",OP_MOVS, 0, 0, OPF_DATA }, |
859 | { "movsw",OP_MOVS, 0, 0, OPF_DATA }, |
860 | { "movsd",OP_MOVS, 0, 0, OPF_DATA }, |
7ba45c34 |
861 | { "cmpsb",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
862 | { "cmpsw",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
863 | { "cmpsd",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
591721d7 |
864 | { "scasb",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
865 | { "scasw",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
866 | { "scasd",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
867 | { "std", OP_STD, 0, 0, OPF_DATA }, // special flag |
868 | { "cld", OP_CLD, 0, 0, OPF_DATA }, |
69a3cdfc |
869 | { "add", OP_ADD, 2, 2, OPF_DATA|OPF_FLAGS }, |
870 | { "sub", OP_SUB, 2, 2, OPF_DATA|OPF_FLAGS }, |
871 | { "and", OP_AND, 2, 2, OPF_DATA|OPF_FLAGS }, |
872 | { "or", OP_OR, 2, 2, OPF_DATA|OPF_FLAGS }, |
873 | { "xor", OP_XOR, 2, 2, OPF_DATA|OPF_FLAGS }, |
874 | { "shl", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
875 | { "shr", OP_SHR, 2, 2, OPF_DATA|OPF_FLAGS }, |
876 | { "sal", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
877 | { "sar", OP_SAR, 2, 2, OPF_DATA|OPF_FLAGS }, |
04abc5d6 |
878 | { "shld", OP_SHLD, 3, 3, OPF_DATA|OPF_FLAGS }, |
3b2f4044 |
879 | { "shrd", OP_SHRD, 3, 3, OPF_DATA|OPF_FLAGS }, |
d4e3b5db |
880 | { "rol", OP_ROL, 2, 2, OPF_DATA|OPF_FLAGS }, |
881 | { "ror", OP_ROR, 2, 2, OPF_DATA|OPF_FLAGS }, |
092f64e1 |
882 | { "rcl", OP_RCL, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
883 | { "rcr", OP_RCR, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
884 | { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
885 | { "sbb", OP_SBB, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
1f84f6b3 |
886 | { "bsf", OP_BSF, 2, 2, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
887 | { "inc", OP_INC, 1, 1, OPF_DATA|OPF_FLAGS }, |
888 | { "dec", OP_DEC, 1, 1, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
889 | { "neg", OP_NEG, 1, 1, OPF_DATA|OPF_FLAGS }, |
890 | { "mul", OP_MUL, 1, 1, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
891 | { "imul", OP_IMUL, 1, 3, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
892 | { "div", OP_DIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
893 | { "idiv", OP_IDIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
894 | { "test", OP_TEST, 2, 2, OPF_FLAGS }, |
895 | { "cmp", OP_CMP, 2, 2, OPF_FLAGS }, |
a3684be1 |
896 | { "retn", OP_RET, 0, 1, OPF_TAIL }, |
de50b98b |
897 | { "call", OP_CALL, 1, 1, OPF_JMP|OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
898 | { "jmp", OP_JMP, 1, 1, OPF_JMP }, |
5c024ef7 |
899 | { "jecxz",OP_JECXZ, 1, 1, OPF_JMP|OPF_CJMP }, |
04abc5d6 |
900 | { "loop", OP_LOOP, 1, 1, OPF_JMP|OPF_CJMP|OPF_DATA }, |
092f64e1 |
901 | { "jo", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_O, 0 }, // 70 OF=1 |
902 | { "jno", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_O, 1 }, // 71 OF=0 |
903 | { "jc", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 0 }, // 72 CF=1 |
904 | { "jb", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 0 }, // 72 |
905 | { "jnc", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 CF=0 |
906 | { "jnb", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 |
907 | { "jae", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 |
908 | { "jz", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 0 }, // 74 ZF=1 |
909 | { "je", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 0 }, // 74 |
910 | { "jnz", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 1 }, // 75 ZF=0 |
911 | { "jne", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 1 }, // 75 |
912 | { "jbe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 0 }, // 76 CF=1||ZF=1 |
913 | { "jna", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 0 }, // 76 |
914 | { "ja", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 1 }, // 77 CF=0&&ZF=0 |
915 | { "jnbe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 1 }, // 77 |
916 | { "js", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_S, 0 }, // 78 SF=1 |
917 | { "jns", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_S, 1 }, // 79 SF=0 |
918 | { "jp", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 0 }, // 7a PF=1 |
919 | { "jpe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 0 }, // 7a |
920 | { "jnp", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 1 }, // 7b PF=0 |
921 | { "jpo", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 1 }, // 7b |
922 | { "jl", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 0 }, // 7c SF!=OF |
923 | { "jnge", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 0 }, // 7c |
924 | { "jge", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 1 }, // 7d SF=OF |
925 | { "jnl", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 1 }, // 7d |
926 | { "jle", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 0 }, // 7e ZF=1||SF!=OF |
927 | { "jng", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 0 }, // 7e |
928 | { "jg", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 1 }, // 7f ZF=0&&SF=OF |
929 | { "jnle", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 1 }, // 7f |
930 | { "seto", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_O, 0 }, |
931 | { "setno", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_O, 1 }, |
932 | { "setc", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 0 }, |
933 | { "setb", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 0 }, |
934 | { "setnc", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
935 | { "setae", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
936 | { "setnb", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
937 | { "setz", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 0 }, |
938 | { "sete", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 0 }, |
939 | { "setnz", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 1 }, |
940 | { "setne", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 1 }, |
941 | { "setbe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 0 }, |
942 | { "setna", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 0 }, |
943 | { "seta", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 1 }, |
944 | { "setnbe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 1 }, |
945 | { "sets", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_S, 0 }, |
946 | { "setns", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_S, 1 }, |
947 | { "setp", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 0 }, |
948 | { "setpe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 0 }, |
949 | { "setnp", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 1 }, |
950 | { "setpo", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 1 }, |
951 | { "setl", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 0 }, |
952 | { "setnge", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 0 }, |
953 | { "setge", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 1 }, |
954 | { "setnl", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 1 }, |
955 | { "setle", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 0 }, |
956 | { "setng", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 0 }, |
957 | { "setg", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 }, |
958 | { "setnle", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 }, |
90307a99 |
959 | // x87 |
960 | // mmx |
961 | { "emms", OP_EMMS, 0, 0, OPF_DATA }, |
962 | { "movq", OP_MOV, 2, 2, OPF_DATA }, |
2c10ea1f |
963 | // must be last |
964 | { "ud2", OP_UD2 }, |
69a3cdfc |
965 | }; |
c36e914d |
966 | |
967 | static void parse_op(struct parsed_op *op, char words[16][256], int wordc) |
968 | { |
bfa4a6ee |
969 | enum opr_lenmod lmod = OPLM_UNSPEC; |
33c35af6 |
970 | int prefix_flags = 0; |
69a3cdfc |
971 | int regmask_ind; |
972 | int regmask; |
33c35af6 |
973 | int op_w = 0; |
91977a1c |
974 | int opr = 0; |
33c35af6 |
975 | int w = 0; |
91977a1c |
976 | int i; |
c36e914d |
977 | |
33c35af6 |
978 | for (i = 0; i < ARRAY_SIZE(pref_table); i++) { |
979 | if (IS(words[w], pref_table[i].name)) { |
980 | prefix_flags = pref_table[i].flags; |
981 | break; |
982 | } |
983 | } |
984 | |
985 | if (prefix_flags) { |
986 | if (wordc <= 1) |
987 | aerr("lone prefix: '%s'\n", words[0]); |
988 | w++; |
989 | } |
990 | |
991 | op_w = w; |
91977a1c |
992 | for (i = 0; i < ARRAY_SIZE(op_table); i++) { |
33c35af6 |
993 | if (IS(words[w], op_table[i].name)) |
69a3cdfc |
994 | break; |
995 | } |
c36e914d |
996 | |
2c10ea1f |
997 | if (i == ARRAY_SIZE(op_table)) { |
30c8c549 |
998 | if (!g_skip_func) |
999 | aerr("unhandled op: '%s'\n", words[0]); |
2c10ea1f |
1000 | i--; // OP_UD2 |
1001 | } |
33c35af6 |
1002 | w++; |
c36e914d |
1003 | |
69a3cdfc |
1004 | op->op = op_table[i].op; |
33c35af6 |
1005 | op->flags = op_table[i].flags | prefix_flags; |
092f64e1 |
1006 | op->pfo = op_table[i].pfo; |
1007 | op->pfo_inv = op_table[i].pfo_inv; |
69a3cdfc |
1008 | op->regmask_src = op->regmask_dst = 0; |
8eb12e72 |
1009 | op->asmln = asmln; |
69a3cdfc |
1010 | |
2c10ea1f |
1011 | if (op->op == OP_UD2) |
1012 | return; |
1013 | |
92d715b6 |
1014 | for (opr = 0; opr < op_table[i].maxopr; opr++) { |
1015 | if (opr >= op_table[i].minopr && w >= wordc) |
1016 | break; |
1017 | |
69a3cdfc |
1018 | regmask = regmask_ind = 0; |
1019 | w = parse_operand(&op->operand[opr], ®mask, ®mask_ind, |
1020 | words, wordc, w, op->flags); |
1021 | |
1022 | if (opr == 0 && (op->flags & OPF_DATA)) |
1023 | op->regmask_dst = regmask; |
92d715b6 |
1024 | else |
1025 | op->regmask_src |= regmask; |
1026 | op->regmask_src |= regmask_ind; |
91977a1c |
1027 | } |
c36e914d |
1028 | |
91977a1c |
1029 | if (w < wordc) |
1030 | aerr("parse_op %s incomplete: %d/%d\n", |
1031 | words[0], w, wordc); |
5101a5f9 |
1032 | |
1033 | // special cases |
1034 | op->operand_cnt = opr; |
1035 | if (!strncmp(op_table[i].name, "set", 3)) |
1036 | op->operand[0].lmod = OPLM_BYTE; |
1037 | |
5101a5f9 |
1038 | switch (op->op) { |
92d715b6 |
1039 | // first operand is not dst |
1040 | case OP_CMP: |
1041 | case OP_TEST: |
1042 | op->regmask_src |= op->regmask_dst; |
1043 | op->regmask_dst = 0; |
1044 | break; |
1045 | |
1046 | // first operand is src too |
1047 | case OP_NOT: |
1048 | case OP_ADD: |
1049 | case OP_AND: |
1050 | case OP_OR: |
1051 | case OP_RCL: |
1052 | case OP_RCR: |
1053 | case OP_ADC: |
1054 | case OP_INC: |
1055 | case OP_DEC: |
1056 | case OP_NEG: |
1057 | // more below.. |
1058 | op->regmask_src |= op->regmask_dst; |
1059 | break; |
1060 | |
1061 | // special |
1062 | case OP_XCHG: |
1063 | op->regmask_src |= op->regmask_dst; |
1064 | op->regmask_dst |= op->regmask_src; |
1065 | goto check_align; |
1066 | |
1067 | case OP_SUB: |
1068 | case OP_SBB: |
1069 | case OP_XOR: |
1070 | if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG |
1071 | && op->operand[0].lmod == op->operand[1].lmod |
1072 | && op->operand[0].reg == op->operand[1].reg |
1073 | && IS(op->operand[0].name, op->operand[1].name)) // ! ah, al.. |
1074 | { |
1075 | op->regmask_src = 0; |
1076 | } |
1077 | else |
1078 | op->regmask_src |= op->regmask_dst; |
1079 | break; |
1080 | |
1081 | // ops with implicit argumets |
04abc5d6 |
1082 | case OP_XLAT: |
1083 | op->operand_cnt = 2; |
1084 | setup_reg_opr(&op->operand[0], xAX, OPLM_BYTE, &op->regmask_src); |
1085 | op->regmask_dst = op->regmask_src; |
1086 | setup_reg_opr(&op->operand[1], xDX, OPLM_DWORD, &op->regmask_src); |
1087 | break; |
1088 | |
5101a5f9 |
1089 | case OP_CDQ: |
1090 | op->operand_cnt = 2; |
1091 | setup_reg_opr(&op->operand[0], xDX, OPLM_DWORD, &op->regmask_dst); |
1092 | setup_reg_opr(&op->operand[1], xAX, OPLM_DWORD, &op->regmask_src); |
1093 | break; |
1094 | |
092f64e1 |
1095 | case OP_LODS: |
33c35af6 |
1096 | case OP_STOS: |
591721d7 |
1097 | case OP_SCAS: |
33c35af6 |
1098 | if (op->operand_cnt != 0) |
1099 | break; |
591721d7 |
1100 | if (words[op_w][4] == 'b') |
33c35af6 |
1101 | lmod = OPLM_BYTE; |
591721d7 |
1102 | else if (words[op_w][4] == 'w') |
33c35af6 |
1103 | lmod = OPLM_WORD; |
591721d7 |
1104 | else if (words[op_w][4] == 'd') |
33c35af6 |
1105 | lmod = OPLM_DWORD; |
1106 | op->operand_cnt = 3; |
092f64e1 |
1107 | setup_reg_opr(&op->operand[0], op->op == OP_LODS ? xSI : xDI, |
1108 | lmod, &op->regmask_src); |
d4e3b5db |
1109 | setup_reg_opr(&op->operand[1], xCX, OPLM_DWORD, &op->regmask_src); |
1110 | op->regmask_dst = op->regmask_src; |
092f64e1 |
1111 | setup_reg_opr(&op->operand[2], xAX, OPLM_DWORD, |
1112 | op->op == OP_LODS ? &op->regmask_dst : &op->regmask_src); |
33c35af6 |
1113 | break; |
1114 | |
d4e3b5db |
1115 | case OP_MOVS: |
7ba45c34 |
1116 | case OP_CMPS: |
d4e3b5db |
1117 | if (op->operand_cnt != 0) |
1118 | break; |
7ba45c34 |
1119 | if (words[op_w][4] == 'b') |
d4e3b5db |
1120 | lmod = OPLM_BYTE; |
7ba45c34 |
1121 | else if (words[op_w][4] == 'w') |
d4e3b5db |
1122 | lmod = OPLM_WORD; |
7ba45c34 |
1123 | else if (words[op_w][4] == 'd') |
d4e3b5db |
1124 | lmod = OPLM_DWORD; |
1125 | op->operand_cnt = 3; |
1126 | setup_reg_opr(&op->operand[0], xDI, lmod, &op->regmask_src); |
1127 | setup_reg_opr(&op->operand[1], xSI, OPLM_DWORD, &op->regmask_src); |
1128 | setup_reg_opr(&op->operand[2], xCX, OPLM_DWORD, &op->regmask_src); |
1129 | op->regmask_dst = op->regmask_src; |
1130 | break; |
1131 | |
04abc5d6 |
1132 | case OP_LOOP: |
1133 | op->regmask_dst = 1 << xCX; |
1134 | // fallthrough |
5c024ef7 |
1135 | case OP_JECXZ: |
04abc5d6 |
1136 | op->operand_cnt = 2; |
5c024ef7 |
1137 | op->regmask_src = 1 << xCX; |
04abc5d6 |
1138 | op->operand[1].type = OPT_REG; |
1139 | op->operand[1].reg = xCX; |
1140 | op->operand[1].lmod = OPLM_DWORD; |
5c024ef7 |
1141 | break; |
1142 | |
5101a5f9 |
1143 | case OP_IMUL: |
1144 | if (op->operand_cnt != 1) |
1145 | break; |
1146 | // fallthrough |
1147 | case OP_MUL: |
1148 | // singleop mul |
92d715b6 |
1149 | op->regmask_src |= op->regmask_dst; |
5101a5f9 |
1150 | op->regmask_dst = (1 << xDX) | (1 << xAX); |
5101a5f9 |
1151 | if (op->operand[0].lmod == OPLM_UNSPEC) |
1152 | op->operand[0].lmod = OPLM_DWORD; |
1153 | break; |
1154 | |
1155 | case OP_DIV: |
1156 | case OP_IDIV: |
1157 | // we could set up operands for edx:eax, but there is no real need to |
1158 | // (see is_opr_modified()) |
92d715b6 |
1159 | op->regmask_src |= op->regmask_dst; |
1160 | op->regmask_dst = (1 << xDX) | (1 << xAX); |
5101a5f9 |
1161 | if (op->operand[0].lmod == OPLM_UNSPEC) |
1162 | op->operand[0].lmod = OPLM_DWORD; |
1163 | break; |
1164 | |
1165 | case OP_SHL: |
1166 | case OP_SHR: |
1167 | case OP_SAR: |
d4e3b5db |
1168 | case OP_ROL: |
1169 | case OP_ROR: |
92d715b6 |
1170 | op->regmask_src |= op->regmask_dst; |
5101a5f9 |
1171 | if (op->operand[1].lmod == OPLM_UNSPEC) |
1172 | op->operand[1].lmod = OPLM_BYTE; |
1173 | break; |
1174 | |
3b2f4044 |
1175 | case OP_SHRD: |
92d715b6 |
1176 | op->regmask_src |= op->regmask_dst; |
3b2f4044 |
1177 | if (op->operand[2].lmod == OPLM_UNSPEC) |
1178 | op->operand[2].lmod = OPLM_BYTE; |
1179 | break; |
1180 | |
7ba45c34 |
1181 | case OP_PUSH: |
92d715b6 |
1182 | op->regmask_src |= op->regmask_dst; |
1183 | op->regmask_dst = 0; |
7ba45c34 |
1184 | if (op->operand[0].lmod == OPLM_UNSPEC |
1185 | && (op->operand[0].type == OPT_CONST |
1186 | || op->operand[0].type == OPT_OFFSET |
1187 | || op->operand[0].type == OPT_LABEL)) |
1188 | op->operand[0].lmod = OPLM_DWORD; |
1189 | break; |
1190 | |
3ebea2cf |
1191 | // alignment |
1192 | case OP_MOV: |
092f64e1 |
1193 | check_align: |
3ebea2cf |
1194 | if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG |
092f64e1 |
1195 | && op->operand[0].lmod == op->operand[1].lmod |
1196 | && op->operand[0].reg == op->operand[1].reg |
92d715b6 |
1197 | && IS(op->operand[0].name, op->operand[1].name)) // ! ah, al.. |
3ebea2cf |
1198 | { |
5e49b270 |
1199 | op->flags |= OPF_RMD | OPF_DONE; |
092f64e1 |
1200 | op->regmask_src = op->regmask_dst = 0; |
3ebea2cf |
1201 | } |
1202 | break; |
1203 | |
de50b98b |
1204 | case OP_LEA: |
1205 | if (op->operand[0].type == OPT_REG |
1206 | && op->operand[1].type == OPT_REGMEM) |
1207 | { |
1208 | char buf[16]; |
1209 | snprintf(buf, sizeof(buf), "%s+0", op->operand[0].name); |
1210 | if (IS(buf, op->operand[1].name)) |
5e49b270 |
1211 | op->flags |= OPF_RMD | OPF_DONE; |
de50b98b |
1212 | } |
1213 | break; |
1214 | |
89ff3147 |
1215 | case OP_CALL: |
1216 | // trashed regs must be explicitly detected later |
1217 | op->regmask_dst = 0; |
1218 | break; |
1219 | |
92d715b6 |
1220 | case OP_LEAVE: |
1221 | op->regmask_dst = (1 << xBP) | (1 << xSP); |
1222 | op->regmask_src = 1 << xBP; |
1223 | break; |
1224 | |
5101a5f9 |
1225 | default: |
1226 | break; |
1227 | } |
2b70f6d3 |
1228 | |
1229 | if (op->operand[0].type == OPT_REG |
1230 | && op->operand[0].lmod == OPLM_DWORD |
1231 | && op->operand[1].type == OPT_CONST) |
1232 | { |
1233 | if ((op->op == OP_AND && op->operand[1].val == 0) |
1234 | || (op->op == OP_OR && op->operand[1].val == ~0)) |
1235 | { |
1236 | op->regmask_src = 0; |
1237 | } |
1238 | } |
c36e914d |
1239 | } |
1240 | |
092f64e1 |
1241 | static const char *op_name(struct parsed_op *po) |
850c9265 |
1242 | { |
092f64e1 |
1243 | static char buf[16]; |
1244 | char *p; |
850c9265 |
1245 | int i; |
1246 | |
092f64e1 |
1247 | if (po->op == OP_JCC || po->op == OP_SCC) { |
1248 | p = buf; |
1249 | *p++ = (po->op == OP_JCC) ? 'j' : 's'; |
1250 | if (po->pfo_inv) |
1251 | *p++ = 'n'; |
1252 | strcpy(p, parsed_flag_op_names[po->pfo]); |
1253 | return buf; |
1254 | } |
1255 | |
850c9265 |
1256 | for (i = 0; i < ARRAY_SIZE(op_table); i++) |
092f64e1 |
1257 | if (op_table[i].op == po->op) |
850c9265 |
1258 | return op_table[i].name; |
1259 | |
1260 | return "???"; |
1261 | } |
1262 | |
1263 | // debug |
1264 | static const char *dump_op(struct parsed_op *po) |
1265 | { |
1266 | static char out[128]; |
1267 | char *p = out; |
1268 | int i; |
1269 | |
4c45fa73 |
1270 | if (po == NULL) |
1271 | return "???"; |
1272 | |
092f64e1 |
1273 | snprintf(out, sizeof(out), "%s", op_name(po)); |
850c9265 |
1274 | for (i = 0; i < po->operand_cnt; i++) { |
1275 | p += strlen(p); |
1276 | if (i > 0) |
1277 | *p++ = ','; |
1278 | snprintf(p, sizeof(out) - (p - out), |
1279 | po->operand[i].type == OPT_REGMEM ? " [%s]" : " %s", |
1280 | po->operand[i].name); |
1281 | } |
1282 | |
1283 | return out; |
1284 | } |
1285 | |
4c45fa73 |
1286 | static const char *lmod_type_u(struct parsed_op *po, |
1287 | enum opr_lenmod lmod) |
1288 | { |
1289 | switch (lmod) { |
90307a99 |
1290 | case OPLM_QWORD: |
1291 | return "u64"; |
4c45fa73 |
1292 | case OPLM_DWORD: |
1293 | return "u32"; |
1294 | case OPLM_WORD: |
1295 | return "u16"; |
1296 | case OPLM_BYTE: |
1297 | return "u8"; |
1298 | default: |
1299 | ferr(po, "invalid lmod: %d\n", lmod); |
1300 | return "(_invalid_)"; |
1301 | } |
1302 | } |
1303 | |
d4e3b5db |
1304 | static const char *lmod_cast_u(struct parsed_op *po, |
1305 | enum opr_lenmod lmod) |
1306 | { |
1307 | switch (lmod) { |
90307a99 |
1308 | case OPLM_QWORD: |
1309 | return ""; |
d4e3b5db |
1310 | case OPLM_DWORD: |
1311 | return ""; |
1312 | case OPLM_WORD: |
1313 | return "(u16)"; |
1314 | case OPLM_BYTE: |
1315 | return "(u8)"; |
1316 | default: |
1317 | ferr(po, "invalid lmod: %d\n", lmod); |
1318 | return "(_invalid_)"; |
1319 | } |
1320 | } |
1321 | |
1322 | static const char *lmod_cast_u_ptr(struct parsed_op *po, |
1323 | enum opr_lenmod lmod) |
1324 | { |
1325 | switch (lmod) { |
90307a99 |
1326 | case OPLM_QWORD: |
1327 | return "*(u64 *)"; |
d4e3b5db |
1328 | case OPLM_DWORD: |
1329 | return "*(u32 *)"; |
1330 | case OPLM_WORD: |
1331 | return "*(u16 *)"; |
1332 | case OPLM_BYTE: |
1333 | return "*(u8 *)"; |
1334 | default: |
1335 | ferr(po, "invalid lmod: %d\n", lmod); |
1336 | return "(_invalid_)"; |
1337 | } |
1338 | } |
1339 | |
1340 | static const char *lmod_cast_s(struct parsed_op *po, |
1341 | enum opr_lenmod lmod) |
1342 | { |
1343 | switch (lmod) { |
90307a99 |
1344 | case OPLM_QWORD: |
1345 | return "(s64)"; |
d4e3b5db |
1346 | case OPLM_DWORD: |
1347 | return "(s32)"; |
1348 | case OPLM_WORD: |
1349 | return "(s16)"; |
1350 | case OPLM_BYTE: |
1351 | return "(s8)"; |
1352 | default: |
1353 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
1354 | return "(_invalid_)"; |
1355 | } |
1356 | } |
1357 | |
1358 | static const char *lmod_cast(struct parsed_op *po, |
1359 | enum opr_lenmod lmod, int is_signed) |
1360 | { |
1361 | return is_signed ? |
1362 | lmod_cast_s(po, lmod) : |
1363 | lmod_cast_u(po, lmod); |
1364 | } |
1365 | |
1366 | static int lmod_bytes(struct parsed_op *po, enum opr_lenmod lmod) |
1367 | { |
1368 | switch (lmod) { |
90307a99 |
1369 | case OPLM_QWORD: |
1370 | return 8; |
d4e3b5db |
1371 | case OPLM_DWORD: |
1372 | return 4; |
1373 | case OPLM_WORD: |
1374 | return 2; |
1375 | case OPLM_BYTE: |
1376 | return 1; |
1377 | default: |
1378 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
1379 | return 0; |
1380 | } |
1381 | } |
1382 | |
91977a1c |
1383 | static const char *opr_name(struct parsed_op *po, int opr_num) |
c36e914d |
1384 | { |
91977a1c |
1385 | if (opr_num >= po->operand_cnt) |
1386 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
1387 | return po->operand[opr_num].name; |
c36e914d |
1388 | } |
1389 | |
91977a1c |
1390 | static unsigned int opr_const(struct parsed_op *po, int opr_num) |
c36e914d |
1391 | { |
91977a1c |
1392 | if (opr_num >= po->operand_cnt) |
1393 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
1394 | if (po->operand[opr_num].type != OPT_CONST) |
1395 | ferr(po, "opr %d: const expected\n", opr_num); |
1396 | return po->operand[opr_num].val; |
1397 | } |
c36e914d |
1398 | |
91977a1c |
1399 | static const char *opr_reg_p(struct parsed_op *po, struct parsed_opr *popr) |
1400 | { |
90307a99 |
1401 | if ((unsigned int)popr->reg >= ARRAY_SIZE(regs_r32)) |
91977a1c |
1402 | ferr(po, "invalid reg: %d\n", popr->reg); |
1403 | return regs_r32[popr->reg]; |
1404 | } |
c36e914d |
1405 | |
a2c1d768 |
1406 | // cast1 is the "final" cast |
1407 | static const char *simplify_cast(const char *cast1, const char *cast2) |
1408 | { |
1409 | static char buf[256]; |
1410 | |
1411 | if (cast1[0] == 0) |
1412 | return cast2; |
1413 | if (cast2[0] == 0) |
1414 | return cast1; |
1415 | if (IS(cast1, cast2)) |
1416 | return cast1; |
1417 | if (IS(cast1, "(s8)") && IS(cast2, "(u8)")) |
1418 | return cast1; |
1419 | if (IS(cast1, "(s16)") && IS(cast2, "(u16)")) |
1420 | return cast1; |
1421 | if (IS(cast1, "(u8)") && IS_START(cast2, "*(u8 *)")) |
1422 | return cast2; |
1423 | if (IS(cast1, "(u16)") && IS_START(cast2, "*(u16 *)")) |
1424 | return cast2; |
1cd4a663 |
1425 | if (strchr(cast1, '*') && IS_START(cast2, "(u32)")) |
1426 | return cast1; |
a2c1d768 |
1427 | |
1428 | snprintf(buf, sizeof(buf), "%s%s", cast1, cast2); |
1429 | return buf; |
1430 | } |
1431 | |
1432 | static const char *simplify_cast_num(const char *cast, unsigned int val) |
1433 | { |
1434 | if (IS(cast, "(u8)") && val < 0x100) |
1435 | return ""; |
1436 | if (IS(cast, "(s8)") && val < 0x80) |
1437 | return ""; |
1438 | if (IS(cast, "(u16)") && val < 0x10000) |
1439 | return ""; |
1440 | if (IS(cast, "(s16)") && val < 0x8000) |
1441 | return ""; |
1442 | if (IS(cast, "(s32)") && val < 0x80000000) |
1443 | return ""; |
1444 | |
1445 | return cast; |
1446 | } |
1447 | |
39b168b8 |
1448 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
1449 | int *extra_offs) |
91977a1c |
1450 | { |
39b168b8 |
1451 | const char *p; |
1452 | char *endp; |
1453 | int namelen; |
850c9265 |
1454 | int i; |
1455 | |
39b168b8 |
1456 | *extra_offs = 0; |
1457 | namelen = strlen(name); |
1458 | |
1459 | p = strchr(name, '+'); |
1460 | if (p != NULL) { |
1461 | namelen = p - name; |
1462 | if (namelen <= 0) |
1463 | ferr(po, "equ parse failed for '%s'\n", name); |
1464 | |
1465 | if (IS_START(p, "0x")) |
1466 | p += 2; |
1467 | *extra_offs = strtol(p, &endp, 16); |
1468 | if (*endp != 0) |
1469 | ferr(po, "equ parse failed for '%s'\n", name); |
1470 | } |
1471 | |
850c9265 |
1472 | for (i = 0; i < g_eqcnt; i++) |
39b168b8 |
1473 | if (strncmp(g_eqs[i].name, name, namelen) == 0 |
1474 | && g_eqs[i].name[namelen] == 0) |
850c9265 |
1475 | break; |
87bf6cec |
1476 | if (i >= g_eqcnt) { |
1477 | if (po != NULL) |
1478 | ferr(po, "unresolved equ name: '%s'\n", name); |
1479 | return NULL; |
1480 | } |
850c9265 |
1481 | |
1482 | return &g_eqs[i]; |
1483 | } |
1484 | |
1cd4a663 |
1485 | static int is_stack_access(struct parsed_op *po, |
1486 | const struct parsed_opr *popr) |
850c9265 |
1487 | { |
09bc6fd5 |
1488 | return (parse_stack_el(popr->name, NULL, 0) |
1cd4a663 |
1489 | || (g_bp_frame && !(po->flags & OPF_EBP_S) |
1490 | && IS_START(popr->name, "ebp"))); |
1491 | } |
1492 | |
1493 | static void parse_stack_access(struct parsed_op *po, |
1494 | const char *name, char *ofs_reg, int *offset_out, |
037f4971 |
1495 | int *stack_ra_out, const char **bp_arg_out, int is_lea) |
1cd4a663 |
1496 | { |
1497 | const char *bp_arg = ""; |
1498 | const char *p = NULL; |
91977a1c |
1499 | struct parsed_equ *eq; |
4f12f671 |
1500 | char *endp = NULL; |
d4e3b5db |
1501 | int stack_ra = 0; |
39b168b8 |
1502 | int offset = 0; |
91977a1c |
1503 | |
1cd4a663 |
1504 | ofs_reg[0] = 0; |
a3684be1 |
1505 | |
1506 | if (IS_START(name, "ebp-") |
1507 | || (IS_START(name, "ebp+") && '0' <= name[4] && name[4] <= '9')) |
1508 | { |
1509 | p = name + 4; |
1510 | if (IS_START(p, "0x")) |
1511 | p += 2; |
1512 | offset = strtoul(p, &endp, 16); |
1513 | if (name[3] == '-') |
1514 | offset = -offset; |
1515 | if (*endp != 0) |
1516 | ferr(po, "ebp- parse of '%s' failed\n", name); |
1517 | } |
1518 | else { |
09bc6fd5 |
1519 | bp_arg = parse_stack_el(name, ofs_reg, 0); |
4f12f671 |
1520 | snprintf(g_comment, sizeof(g_comment), "%s", bp_arg); |
1521 | eq = equ_find(po, bp_arg, &offset); |
1522 | if (eq == NULL) |
1523 | ferr(po, "detected but missing eq\n"); |
1524 | offset += eq->offset; |
1525 | } |
39b168b8 |
1526 | |
d4e3b5db |
1527 | if (!strncmp(name, "ebp", 3)) |
1528 | stack_ra = 4; |
1529 | |
037f4971 |
1530 | // yes it sometimes LEAs ra for compares.. |
1531 | if (!is_lea && ofs_reg[0] == 0 |
1532 | && stack_ra <= offset && offset < stack_ra + 4) |
1533 | { |
39b168b8 |
1534 | ferr(po, "reference to ra? %d %d\n", offset, stack_ra); |
037f4971 |
1535 | } |
d4e3b5db |
1536 | |
1cd4a663 |
1537 | *offset_out = offset; |
1538 | *stack_ra_out = stack_ra; |
1539 | if (bp_arg_out) |
1540 | *bp_arg_out = bp_arg; |
1541 | } |
1542 | |
5f70a34f |
1543 | static int stack_frame_access(struct parsed_op *po, |
1cd4a663 |
1544 | struct parsed_opr *popr, char *buf, size_t buf_size, |
1545 | const char *name, const char *cast, int is_src, int is_lea) |
1546 | { |
1547 | enum opr_lenmod tmp_lmod = OPLM_UNSPEC; |
1548 | const char *prefix = ""; |
1549 | const char *bp_arg = NULL; |
1550 | char ofs_reg[16] = { 0, }; |
1551 | int i, arg_i, arg_s; |
1552 | int unaligned = 0; |
1553 | int stack_ra = 0; |
1554 | int offset = 0; |
5f70a34f |
1555 | int retval = -1; |
1cd4a663 |
1556 | int sf_ofs; |
1557 | int lim; |
1558 | |
1559 | if (po->flags & OPF_EBP_S) |
1560 | ferr(po, "stack_frame_access while ebp is scratch\n"); |
1561 | |
037f4971 |
1562 | parse_stack_access(po, name, ofs_reg, &offset, |
1563 | &stack_ra, &bp_arg, is_lea); |
1cd4a663 |
1564 | |
4f12f671 |
1565 | if (offset > stack_ra) |
1566 | { |
39b168b8 |
1567 | arg_i = (offset - stack_ra - 4) / 4; |
bd96f656 |
1568 | if (arg_i < 0 || arg_i >= g_func_pp->argc_stack) |
4f12f671 |
1569 | { |
bd96f656 |
1570 | if (g_func_pp->is_vararg |
1571 | && arg_i == g_func_pp->argc_stack && is_lea) |
1572 | { |
4f12f671 |
1573 | // should be va_list |
1574 | if (cast[0] == 0) |
1575 | cast = "(u32)"; |
1576 | snprintf(buf, buf_size, "%sap", cast); |
5f70a34f |
1577 | return -1; |
4f12f671 |
1578 | } |
1579 | ferr(po, "offset %d (%s,%d) doesn't map to any arg\n", |
1580 | offset, bp_arg, arg_i); |
1581 | } |
4c45fa73 |
1582 | if (ofs_reg[0] != 0) |
7ba45c34 |
1583 | ferr(po, "offset reg on arg access?\n"); |
91977a1c |
1584 | |
bd96f656 |
1585 | for (i = arg_s = 0; i < g_func_pp->argc; i++) { |
1586 | if (g_func_pp->arg[i].reg != NULL) |
91977a1c |
1587 | continue; |
1588 | if (arg_s == arg_i) |
1589 | break; |
1590 | arg_s++; |
1591 | } |
bd96f656 |
1592 | if (i == g_func_pp->argc) |
91977a1c |
1593 | ferr(po, "arg %d not in prototype?\n", arg_i); |
850c9265 |
1594 | |
bd96f656 |
1595 | popr->is_ptr = g_func_pp->arg[i].type.is_ptr; |
5f70a34f |
1596 | retval = i; |
de50b98b |
1597 | |
1598 | switch (popr->lmod) |
7ba45c34 |
1599 | { |
1600 | case OPLM_BYTE: |
4f12f671 |
1601 | if (is_lea) |
1602 | ferr(po, "lea/byte to arg?\n"); |
7ba45c34 |
1603 | if (is_src && (offset & 3) == 0) |
a2c1d768 |
1604 | snprintf(buf, buf_size, "%sa%d", |
1605 | simplify_cast(cast, "(u8)"), i + 1); |
7ba45c34 |
1606 | else |
a2c1d768 |
1607 | snprintf(buf, buf_size, "%sBYTE%d(a%d)", |
1608 | cast, offset & 3, i + 1); |
7ba45c34 |
1609 | break; |
1610 | |
1611 | case OPLM_WORD: |
4f12f671 |
1612 | if (is_lea) |
1613 | ferr(po, "lea/word to arg?\n"); |
a3684be1 |
1614 | if (offset & 1) { |
1615 | unaligned = 1; |
1616 | if (!is_src) { |
1617 | if (offset & 2) |
1618 | ferr(po, "problematic arg store\n"); |
a2c1d768 |
1619 | snprintf(buf, buf_size, "%s((char *)&a%d + 1)", |
1620 | simplify_cast(cast, "*(u16 *)"), i + 1); |
a3684be1 |
1621 | } |
1622 | else |
1623 | ferr(po, "unaligned arg word load\n"); |
1624 | } |
1625 | else if (is_src && (offset & 2) == 0) |
a2c1d768 |
1626 | snprintf(buf, buf_size, "%sa%d", |
1627 | simplify_cast(cast, "(u16)"), i + 1); |
7ba45c34 |
1628 | else |
a2c1d768 |
1629 | snprintf(buf, buf_size, "%s%sWORD(a%d)", |
1630 | cast, (offset & 2) ? "HI" : "LO", i + 1); |
7ba45c34 |
1631 | break; |
1632 | |
1633 | case OPLM_DWORD: |
3ebea2cf |
1634 | if (cast[0]) |
1635 | prefix = cast; |
1636 | else if (is_src) |
1637 | prefix = "(u32)"; |
a3684be1 |
1638 | |
de50b98b |
1639 | if (offset & 3) { |
a3684be1 |
1640 | unaligned = 1; |
2b43685d |
1641 | if (is_lea) |
1642 | snprintf(buf, buf_size, "(u32)&a%d + %d", |
1643 | i + 1, offset & 3); |
a3684be1 |
1644 | else if (!is_src) |
1645 | ferr(po, "unaligned arg store\n"); |
1646 | else { |
1647 | // mov edx, [ebp+arg_4+2]; movsx ecx, dx |
2b43685d |
1648 | snprintf(buf, buf_size, "%s(a%d >> %d)", |
1649 | prefix, i + 1, (offset & 3) * 8); |
a3684be1 |
1650 | } |
de50b98b |
1651 | } |
1652 | else { |
1653 | snprintf(buf, buf_size, "%s%sa%d", |
1654 | prefix, is_lea ? "&" : "", i + 1); |
1655 | } |
7ba45c34 |
1656 | break; |
1657 | |
1658 | default: |
de50b98b |
1659 | ferr(po, "bp_arg bad lmod: %d\n", popr->lmod); |
7ba45c34 |
1660 | } |
1661 | |
a3684be1 |
1662 | if (unaligned) |
1663 | snprintf(g_comment, sizeof(g_comment), "%s unaligned", bp_arg); |
1664 | |
7ba45c34 |
1665 | // common problem |
bd96f656 |
1666 | guess_lmod_from_c_type(&tmp_lmod, &g_func_pp->arg[i].type); |
a2c1d768 |
1667 | if (tmp_lmod != OPLM_DWORD |
de041e5b |
1668 | && (unaligned || (!is_src && lmod_bytes(po, tmp_lmod) |
1669 | < lmod_bytes(po, popr->lmod) + (offset & 3)))) |
a2c1d768 |
1670 | { |
1671 | ferr(po, "bp_arg arg%d/w offset %d and type '%s' is too small\n", |
1672 | i + 1, offset, g_func_pp->arg[i].type.name); |
1673 | } |
4741fdfe |
1674 | // can't check this because msvc likes to reuse |
1675 | // arg space for scratch.. |
1676 | //if (popr->is_ptr && popr->lmod != OPLM_DWORD) |
1677 | // ferr(po, "bp_arg arg%d: non-dword ptr access\n", i + 1); |
91977a1c |
1678 | } |
4f12f671 |
1679 | else |
1680 | { |
1bafb621 |
1681 | if (g_stack_fsz == 0) |
1682 | ferr(po, "stack var access without stackframe\n"); |
a2c1d768 |
1683 | g_stack_frame_used = 1; |
850c9265 |
1684 | |
39b168b8 |
1685 | sf_ofs = g_stack_fsz + offset; |
de50b98b |
1686 | lim = (ofs_reg[0] != 0) ? -4 : 0; |
1687 | if (offset > 0 || sf_ofs < lim) |
39b168b8 |
1688 | ferr(po, "bp_stack offset %d/%d\n", offset, g_stack_fsz); |
850c9265 |
1689 | |
1690 | if (is_lea) |
33c35af6 |
1691 | prefix = "(u32)&"; |
3ebea2cf |
1692 | else |
1693 | prefix = cast; |
850c9265 |
1694 | |
de50b98b |
1695 | switch (popr->lmod) |
850c9265 |
1696 | { |
1697 | case OPLM_BYTE: |
7ba45c34 |
1698 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1699 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
850c9265 |
1700 | break; |
7ba45c34 |
1701 | |
850c9265 |
1702 | case OPLM_WORD: |
7ba45c34 |
1703 | if ((sf_ofs & 1) || ofs_reg[0] != 0) { |
1704 | // known unaligned or possibly unaligned |
1705 | strcat(g_comment, " unaligned"); |
1706 | if (prefix[0] == 0) |
1707 | prefix = "*(u16 *)&"; |
1708 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1709 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
1710 | break; |
1711 | } |
1712 | snprintf(buf, buf_size, "%ssf.w[%d]", prefix, sf_ofs / 2); |
850c9265 |
1713 | break; |
7ba45c34 |
1714 | |
850c9265 |
1715 | case OPLM_DWORD: |
7ba45c34 |
1716 | if ((sf_ofs & 3) || ofs_reg[0] != 0) { |
1717 | // known unaligned or possibly unaligned |
1718 | strcat(g_comment, " unaligned"); |
1719 | if (prefix[0] == 0) |
1720 | prefix = "*(u32 *)&"; |
1721 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1722 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
1723 | break; |
1724 | } |
1725 | snprintf(buf, buf_size, "%ssf.d[%d]", prefix, sf_ofs / 4); |
850c9265 |
1726 | break; |
7ba45c34 |
1727 | |
850c9265 |
1728 | default: |
de50b98b |
1729 | ferr(po, "bp_stack bad lmod: %d\n", popr->lmod); |
850c9265 |
1730 | } |
91977a1c |
1731 | } |
5f70a34f |
1732 | |
1733 | return retval; |
91977a1c |
1734 | } |
c36e914d |
1735 | |
89ff3147 |
1736 | static void check_func_pp(struct parsed_op *po, |
1737 | const struct parsed_proto *pp, const char *pfx) |
1738 | { |
179b79a9 |
1739 | enum opr_lenmod tmp_lmod; |
b74c31e3 |
1740 | char buf[256]; |
179b79a9 |
1741 | int ret, i; |
b74c31e3 |
1742 | |
89ff3147 |
1743 | if (pp->argc_reg != 0) { |
b74c31e3 |
1744 | if (/*!g_allow_regfunc &&*/ !pp->is_fastcall) { |
1745 | pp_print(buf, sizeof(buf), pp); |
1746 | ferr(po, "%s: unexpected reg arg in icall: %s\n", pfx, buf); |
1747 | } |
89ff3147 |
1748 | if (pp->argc_stack > 0 && pp->argc_reg != 2) |
1749 | ferr(po, "%s: %d reg arg(s) with %d stack arg(s)\n", |
1750 | pfx, pp->argc_reg, pp->argc_stack); |
1751 | } |
179b79a9 |
1752 | |
1753 | // fptrs must use 32bit args, callsite might have no information and |
1754 | // lack a cast to smaller types, which results in incorrectly masked |
1755 | // args passed (callee may assume masked args, it does on ARM) |
61e29183 |
1756 | if (!pp->is_osinc) { |
179b79a9 |
1757 | for (i = 0; i < pp->argc; i++) { |
1758 | ret = guess_lmod_from_c_type(&tmp_lmod, &pp->arg[i].type); |
1759 | if (ret && tmp_lmod != OPLM_DWORD) |
1760 | ferr(po, "reference to %s with arg%d '%s'\n", pp->name, |
1761 | i + 1, pp->arg[i].type.name); |
1762 | } |
1763 | } |
89ff3147 |
1764 | } |
1765 | |
7aca4698 |
1766 | static const char *check_label_read_ref(struct parsed_op *po, |
1767 | const char *name) |
3ebea2cf |
1768 | { |
840257f6 |
1769 | const struct parsed_proto *pp; |
1770 | |
36595fd2 |
1771 | pp = proto_parse(g_fhdr, name, 0); |
840257f6 |
1772 | if (pp == NULL) |
1773 | ferr(po, "proto_parse failed for ref '%s'\n", name); |
1774 | |
89ff3147 |
1775 | if (pp->is_func) |
1776 | check_func_pp(po, pp, "ref"); |
7aca4698 |
1777 | |
1778 | return pp->name; |
3ebea2cf |
1779 | } |
1780 | |
91977a1c |
1781 | static char *out_src_opr(char *buf, size_t buf_size, |
591721d7 |
1782 | struct parsed_op *po, struct parsed_opr *popr, const char *cast, |
3ebea2cf |
1783 | int is_lea) |
91977a1c |
1784 | { |
850c9265 |
1785 | char tmp1[256], tmp2[256]; |
1786 | char expr[256]; |
7aca4698 |
1787 | const char *name; |
a2c1d768 |
1788 | char *p; |
850c9265 |
1789 | int ret; |
1790 | |
3ebea2cf |
1791 | if (cast == NULL) |
1792 | cast = ""; |
1793 | |
91977a1c |
1794 | switch (popr->type) { |
1795 | case OPT_REG: |
850c9265 |
1796 | if (is_lea) |
1797 | ferr(po, "lea from reg?\n"); |
1798 | |
91977a1c |
1799 | switch (popr->lmod) { |
90307a99 |
1800 | case OPLM_QWORD: |
1801 | snprintf(buf, buf_size, "%s%s.q", cast, opr_reg_p(po, popr)); |
1802 | break; |
91977a1c |
1803 | case OPLM_DWORD: |
3ebea2cf |
1804 | snprintf(buf, buf_size, "%s%s", cast, opr_reg_p(po, popr)); |
91977a1c |
1805 | break; |
850c9265 |
1806 | case OPLM_WORD: |
a2c1d768 |
1807 | snprintf(buf, buf_size, "%s%s", |
1808 | simplify_cast(cast, "(u16)"), opr_reg_p(po, popr)); |
850c9265 |
1809 | break; |
1810 | case OPLM_BYTE: |
5101a5f9 |
1811 | if (popr->name[1] == 'h') // XXX.. |
a2c1d768 |
1812 | snprintf(buf, buf_size, "%s(%s >> 8)", |
1813 | simplify_cast(cast, "(u8)"), opr_reg_p(po, popr)); |
5101a5f9 |
1814 | else |
a2c1d768 |
1815 | snprintf(buf, buf_size, "%s%s", |
1816 | simplify_cast(cast, "(u8)"), opr_reg_p(po, popr)); |
850c9265 |
1817 | break; |
91977a1c |
1818 | default: |
1819 | ferr(po, "invalid src lmod: %d\n", popr->lmod); |
1820 | } |
1821 | break; |
850c9265 |
1822 | |
91977a1c |
1823 | case OPT_REGMEM: |
1cd4a663 |
1824 | if (is_stack_access(po, popr)) { |
de50b98b |
1825 | stack_frame_access(po, popr, buf, buf_size, |
3ebea2cf |
1826 | popr->name, cast, 1, is_lea); |
91977a1c |
1827 | break; |
1828 | } |
850c9265 |
1829 | |
1830 | strcpy(expr, popr->name); |
1831 | if (strchr(expr, '[')) { |
1832 | // special case: '[' can only be left for label[reg] form |
1833 | ret = sscanf(expr, "%[^[][%[^]]]", tmp1, tmp2); |
1834 | if (ret != 2) |
1835 | ferr(po, "parse failure for '%s'\n", expr); |
a2c1d768 |
1836 | if (tmp1[0] == '(') { |
1837 | // (off_4FFF50+3)[eax] |
1838 | p = strchr(tmp1 + 1, ')'); |
1839 | if (p == NULL || p[1] != 0) |
1840 | ferr(po, "parse failure (2) for '%s'\n", expr); |
1841 | *p = 0; |
1842 | memmove(tmp1, tmp1 + 1, strlen(tmp1)); |
1843 | } |
33c35af6 |
1844 | snprintf(expr, sizeof(expr), "(u32)&%s + %s", tmp1, tmp2); |
850c9265 |
1845 | } |
1846 | |
1847 | // XXX: do we need more parsing? |
1848 | if (is_lea) { |
1849 | snprintf(buf, buf_size, "%s", expr); |
1850 | break; |
1851 | } |
1852 | |
a2c1d768 |
1853 | snprintf(buf, buf_size, "%s(%s)", |
1854 | simplify_cast(cast, lmod_cast_u_ptr(po, popr->lmod)), expr); |
91977a1c |
1855 | break; |
850c9265 |
1856 | |
91977a1c |
1857 | case OPT_LABEL: |
7aca4698 |
1858 | name = check_label_read_ref(po, popr->name); |
3ebea2cf |
1859 | if (cast[0] == 0 && popr->is_ptr) |
1860 | cast = "(u32)"; |
2b43685d |
1861 | |
850c9265 |
1862 | if (is_lea) |
7aca4698 |
1863 | snprintf(buf, buf_size, "(u32)&%s", name); |
2b43685d |
1864 | else if (popr->size_lt) |
1865 | snprintf(buf, buf_size, "%s%s%s%s", cast, |
1866 | lmod_cast_u_ptr(po, popr->lmod), |
7aca4698 |
1867 | popr->is_array ? "" : "&", name); |
850c9265 |
1868 | else |
7aca4698 |
1869 | snprintf(buf, buf_size, "%s%s%s", cast, name, |
7ba45c34 |
1870 | popr->is_array ? "[0]" : ""); |
850c9265 |
1871 | break; |
1872 | |
1873 | case OPT_OFFSET: |
7aca4698 |
1874 | name = check_label_read_ref(po, popr->name); |
3ebea2cf |
1875 | if (cast[0] == 0) |
1876 | cast = "(u32)"; |
850c9265 |
1877 | if (is_lea) |
1878 | ferr(po, "lea an offset?\n"); |
7aca4698 |
1879 | snprintf(buf, buf_size, "%s&%s", cast, name); |
91977a1c |
1880 | break; |
850c9265 |
1881 | |
91977a1c |
1882 | case OPT_CONST: |
850c9265 |
1883 | if (is_lea) |
1884 | ferr(po, "lea from const?\n"); |
1885 | |
a2c1d768 |
1886 | printf_number(tmp1, sizeof(tmp1), popr->val); |
ddaf8bd7 |
1887 | if (popr->val == 0 && strchr(cast, '*')) |
1888 | snprintf(buf, buf_size, "NULL"); |
1889 | else |
1890 | snprintf(buf, buf_size, "%s%s", |
1891 | simplify_cast_num(cast, popr->val), tmp1); |
91977a1c |
1892 | break; |
850c9265 |
1893 | |
91977a1c |
1894 | default: |
1895 | ferr(po, "invalid src type: %d\n", popr->type); |
1896 | } |
1897 | |
1898 | return buf; |
1899 | } |
c36e914d |
1900 | |
de50b98b |
1901 | // note: may set is_ptr (we find that out late for ebp frame..) |
91977a1c |
1902 | static char *out_dst_opr(char *buf, size_t buf_size, |
1903 | struct parsed_op *po, struct parsed_opr *popr) |
1904 | { |
1905 | switch (popr->type) { |
1906 | case OPT_REG: |
1907 | switch (popr->lmod) { |
90307a99 |
1908 | case OPLM_QWORD: |
1909 | snprintf(buf, buf_size, "%s.q", opr_reg_p(po, popr)); |
1910 | break; |
91977a1c |
1911 | case OPLM_DWORD: |
1912 | snprintf(buf, buf_size, "%s", opr_reg_p(po, popr)); |
1913 | break; |
850c9265 |
1914 | case OPLM_WORD: |
1915 | // ugh.. |
1916 | snprintf(buf, buf_size, "LOWORD(%s)", opr_reg_p(po, popr)); |
1917 | break; |
1918 | case OPLM_BYTE: |
1919 | // ugh.. |
5101a5f9 |
1920 | if (popr->name[1] == 'h') // XXX.. |
1921 | snprintf(buf, buf_size, "BYTE1(%s)", opr_reg_p(po, popr)); |
1922 | else |
1923 | snprintf(buf, buf_size, "LOBYTE(%s)", opr_reg_p(po, popr)); |
850c9265 |
1924 | break; |
91977a1c |
1925 | default: |
1926 | ferr(po, "invalid dst lmod: %d\n", popr->lmod); |
1927 | } |
1928 | break; |
850c9265 |
1929 | |
1930 | case OPT_REGMEM: |
1cd4a663 |
1931 | if (is_stack_access(po, popr)) { |
de50b98b |
1932 | stack_frame_access(po, popr, buf, buf_size, |
3ebea2cf |
1933 | popr->name, "", 0, 0); |
850c9265 |
1934 | break; |
1935 | } |
1936 | |
3ebea2cf |
1937 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
850c9265 |
1938 | |
bfa4a6ee |
1939 | case OPT_LABEL: |
2b43685d |
1940 | if (popr->size_mismatch) |
1941 | snprintf(buf, buf_size, "%s%s%s", |
1942 | lmod_cast_u_ptr(po, popr->lmod), |
1943 | popr->is_array ? "" : "&", popr->name); |
1944 | else |
1945 | snprintf(buf, buf_size, "%s%s", popr->name, |
1946 | popr->is_array ? "[0]" : ""); |
bfa4a6ee |
1947 | break; |
1948 | |
91977a1c |
1949 | default: |
1950 | ferr(po, "invalid dst type: %d\n", popr->type); |
1951 | } |
1952 | |
1953 | return buf; |
1954 | } |
c36e914d |
1955 | |
3ebea2cf |
1956 | static char *out_src_opr_u32(char *buf, size_t buf_size, |
1957 | struct parsed_op *po, struct parsed_opr *popr) |
1958 | { |
1959 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
1960 | } |
1961 | |
91977a1c |
1962 | static void out_test_for_cc(char *buf, size_t buf_size, |
940e8e66 |
1963 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv, |
69a3cdfc |
1964 | enum opr_lenmod lmod, const char *expr) |
91977a1c |
1965 | { |
69a3cdfc |
1966 | const char *cast, *scast; |
91977a1c |
1967 | |
69a3cdfc |
1968 | cast = lmod_cast_u(po, lmod); |
1969 | scast = lmod_cast_s(po, lmod); |
1970 | |
1971 | switch (pfo) { |
1972 | case PFO_Z: |
87bf6cec |
1973 | case PFO_BE: // CF=1||ZF=1; CF=0 |
850c9265 |
1974 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1975 | cast, expr, is_inv ? "!=" : "=="); |
91977a1c |
1976 | break; |
850c9265 |
1977 | |
5101a5f9 |
1978 | case PFO_S: |
1979 | case PFO_L: // SF!=OF; OF=0 |
1980 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1981 | scast, expr, is_inv ? ">=" : "<"); |
5101a5f9 |
1982 | break; |
1983 | |
87bf6cec |
1984 | case PFO_LE: // ZF=1||SF!=OF; OF=0 |
69a3cdfc |
1985 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1986 | scast, expr, is_inv ? ">" : "<="); |
850c9265 |
1987 | break; |
1988 | |
91977a1c |
1989 | default: |
69a3cdfc |
1990 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
91977a1c |
1991 | } |
1992 | } |
c36e914d |
1993 | |
850c9265 |
1994 | static void out_cmp_for_cc(char *buf, size_t buf_size, |
a2c1d768 |
1995 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv) |
850c9265 |
1996 | { |
a2c1d768 |
1997 | const char *cast, *scast, *cast_use; |
1998 | char buf1[256], buf2[256]; |
1999 | enum opr_lenmod lmod; |
2000 | |
90307a99 |
2001 | if (po->op != OP_DEC && po->operand[0].lmod != po->operand[1].lmod) |
a2c1d768 |
2002 | ferr(po, "%s: lmod mismatch: %d %d\n", __func__, |
2003 | po->operand[0].lmod, po->operand[1].lmod); |
2004 | lmod = po->operand[0].lmod; |
850c9265 |
2005 | |
69a3cdfc |
2006 | cast = lmod_cast_u(po, lmod); |
2007 | scast = lmod_cast_s(po, lmod); |
850c9265 |
2008 | |
a2c1d768 |
2009 | switch (pfo) { |
2010 | case PFO_C: |
2011 | case PFO_Z: |
2012 | case PFO_BE: // !a |
2013 | cast_use = cast; |
2014 | break; |
2015 | |
2016 | case PFO_S: |
2017 | case PFO_L: // !ge |
2018 | case PFO_LE: |
2019 | cast_use = scast; |
2020 | break; |
2021 | |
2022 | default: |
2023 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
2024 | } |
2025 | |
2026 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], cast_use, 0); |
90307a99 |
2027 | if (po->op == OP_DEC) |
2028 | snprintf(buf2, sizeof(buf2), "1"); |
2029 | else |
2030 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], cast_use, 0); |
a2c1d768 |
2031 | |
69a3cdfc |
2032 | switch (pfo) { |
5101a5f9 |
2033 | case PFO_C: |
2034 | // note: must be unsigned compare |
a2c1d768 |
2035 | snprintf(buf, buf_size, "(%s %s %s)", |
2036 | buf1, is_inv ? ">=" : "<", buf2); |
5101a5f9 |
2037 | break; |
2038 | |
69a3cdfc |
2039 | case PFO_Z: |
a2c1d768 |
2040 | snprintf(buf, buf_size, "(%s %s %s)", |
2041 | buf1, is_inv ? "!=" : "==", buf2); |
850c9265 |
2042 | break; |
2043 | |
5101a5f9 |
2044 | case PFO_BE: // !a |
850c9265 |
2045 | // note: must be unsigned compare |
a2c1d768 |
2046 | snprintf(buf, buf_size, "(%s %s %s)", |
2047 | buf1, is_inv ? ">" : "<=", buf2); |
2048 | |
2049 | // annoying case |
2050 | if (is_inv && lmod == OPLM_BYTE |
2051 | && po->operand[1].type == OPT_CONST |
2052 | && po->operand[1].val == 0xff) |
2053 | { |
2054 | snprintf(g_comment, sizeof(g_comment), "if %s", buf); |
2055 | snprintf(buf, buf_size, "(0)"); |
2056 | } |
5101a5f9 |
2057 | break; |
2058 | |
2059 | // note: must be signed compare |
2060 | case PFO_S: |
2061 | snprintf(buf, buf_size, "(%s(%s - %s) %s 0)", |
a2c1d768 |
2062 | scast, buf1, buf2, is_inv ? ">=" : "<"); |
850c9265 |
2063 | break; |
2064 | |
5101a5f9 |
2065 | case PFO_L: // !ge |
a2c1d768 |
2066 | snprintf(buf, buf_size, "(%s %s %s)", |
2067 | buf1, is_inv ? ">=" : "<", buf2); |
850c9265 |
2068 | break; |
2069 | |
90307a99 |
2070 | case PFO_LE: // !g |
a2c1d768 |
2071 | snprintf(buf, buf_size, "(%s %s %s)", |
2072 | buf1, is_inv ? ">" : "<=", buf2); |
5101a5f9 |
2073 | break; |
2074 | |
850c9265 |
2075 | default: |
a2c1d768 |
2076 | break; |
850c9265 |
2077 | } |
2078 | } |
2079 | |
69a3cdfc |
2080 | static void out_cmp_test(char *buf, size_t buf_size, |
940e8e66 |
2081 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv) |
69a3cdfc |
2082 | { |
2083 | char buf1[256], buf2[256], buf3[256]; |
2084 | |
2085 | if (po->op == OP_TEST) { |
2086 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
3ebea2cf |
2087 | out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[0]); |
69a3cdfc |
2088 | } |
2089 | else { |
3ebea2cf |
2090 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
2091 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
69a3cdfc |
2092 | snprintf(buf3, sizeof(buf3), "(%s & %s)", buf1, buf2); |
2093 | } |
940e8e66 |
2094 | out_test_for_cc(buf, buf_size, po, pfo, is_inv, |
69a3cdfc |
2095 | po->operand[0].lmod, buf3); |
2096 | } |
2097 | else if (po->op == OP_CMP) { |
a2c1d768 |
2098 | out_cmp_for_cc(buf, buf_size, po, pfo, is_inv); |
69a3cdfc |
2099 | } |
2100 | else |
2101 | ferr(po, "%s: unhandled op: %d\n", __func__, po->op); |
2102 | } |
2103 | |
850c9265 |
2104 | static void propagate_lmod(struct parsed_op *po, struct parsed_opr *popr1, |
91977a1c |
2105 | struct parsed_opr *popr2) |
2106 | { |
2107 | if (popr1->lmod == OPLM_UNSPEC && popr2->lmod == OPLM_UNSPEC) |
2108 | ferr(po, "missing lmod for both operands\n"); |
2109 | |
2110 | if (popr1->lmod == OPLM_UNSPEC) |
2111 | popr1->lmod = popr2->lmod; |
2112 | else if (popr2->lmod == OPLM_UNSPEC) |
2113 | popr2->lmod = popr1->lmod; |
a3684be1 |
2114 | else if (popr1->lmod != popr2->lmod) { |
2115 | if (popr1->type_from_var) { |
2116 | popr1->size_mismatch = 1; |
2117 | if (popr1->lmod < popr2->lmod) |
2118 | popr1->size_lt = 1; |
2119 | popr1->lmod = popr2->lmod; |
2120 | } |
2121 | else if (popr2->type_from_var) { |
2122 | popr2->size_mismatch = 1; |
2123 | if (popr2->lmod < popr1->lmod) |
2124 | popr2->size_lt = 1; |
2125 | popr2->lmod = popr1->lmod; |
2126 | } |
2127 | else |
2128 | ferr(po, "conflicting lmods: %d vs %d\n", |
2129 | popr1->lmod, popr2->lmod); |
2130 | } |
91977a1c |
2131 | } |
c36e914d |
2132 | |
850c9265 |
2133 | static const char *op_to_c(struct parsed_op *po) |
2134 | { |
2135 | switch (po->op) |
2136 | { |
2137 | case OP_ADD: |
5101a5f9 |
2138 | case OP_ADC: |
850c9265 |
2139 | return "+"; |
2140 | case OP_SUB: |
5101a5f9 |
2141 | case OP_SBB: |
850c9265 |
2142 | return "-"; |
2143 | case OP_AND: |
2144 | return "&"; |
2145 | case OP_OR: |
2146 | return "|"; |
2147 | case OP_XOR: |
2148 | return "^"; |
2149 | case OP_SHL: |
2150 | return "<<"; |
2151 | case OP_SHR: |
2152 | return ">>"; |
2153 | case OP_MUL: |
2154 | case OP_IMUL: |
2155 | return "*"; |
2156 | default: |
2157 | ferr(po, "op_to_c was supplied with %d\n", po->op); |
2158 | } |
2159 | } |
2160 | |
7ae48d73 |
2161 | static void op_set_clear_flag(struct parsed_op *po, |
2162 | enum op_flags flag_set, enum op_flags flag_clear) |
d4e3b5db |
2163 | { |
7ae48d73 |
2164 | po->flags |= flag_set; |
2165 | po->flags &= ~flag_clear; |
d4e3b5db |
2166 | } |
2167 | |
de50b98b |
2168 | // last op in stream - unconditional branch or ret |
2169 | #define LAST_OP(_i) ((ops[_i].flags & OPF_TAIL) \ |
092f64e1 |
2170 | || ((ops[_i].flags & (OPF_JMP|OPF_CJMP|OPF_RMD)) == OPF_JMP \ |
037f4971 |
2171 | && ops[_i].op != OP_CALL)) |
de50b98b |
2172 | |
db63af51 |
2173 | #define check_i(po, i) \ |
2174 | if ((i) < 0) \ |
2175 | ferr(po, "bad " #i ": %d\n", i) |
2176 | |
e83ea7ed |
2177 | // note: this skips over calls and rm'd stuff assuming they're handled |
2178 | // so it's intended to use at one of final passes |
2179 | static int scan_for_pop(int i, int opcnt, int magic, int reg, |
2180 | int depth, int *maxdepth, int do_flags) |
850c9265 |
2181 | { |
89ff3147 |
2182 | const struct parsed_proto *pp; |
87bf6cec |
2183 | struct parsed_op *po; |
e83ea7ed |
2184 | int relevant; |
87bf6cec |
2185 | int ret = 0; |
4c45fa73 |
2186 | int j; |
87bf6cec |
2187 | |
850c9265 |
2188 | for (; i < opcnt; i++) { |
87bf6cec |
2189 | po = &ops[i]; |
2190 | if (po->cc_scratch == magic) |
2191 | break; // already checked |
2192 | po->cc_scratch = magic; |
2193 | |
89ff3147 |
2194 | if (po->flags & OPF_TAIL) { |
2195 | if (po->op == OP_CALL) { |
92d715b6 |
2196 | pp = proto_parse(g_fhdr, po->operand[0].name, g_quiet_pp); |
89ff3147 |
2197 | if (pp != NULL && pp->is_noreturn) |
2198 | // no stack cleanup for noreturn |
2199 | return ret; |
2200 | } |
87bf6cec |
2201 | return -1; // deadend |
89ff3147 |
2202 | } |
87bf6cec |
2203 | |
e83ea7ed |
2204 | if (po->flags & (OPF_RMD|OPF_DONE|OPF_FARG)) |
850c9265 |
2205 | continue; |
2206 | |
87bf6cec |
2207 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
4c45fa73 |
2208 | if (po->btj != NULL) { |
2209 | // jumptable |
da87ae38 |
2210 | for (j = 0; j < po->btj->count; j++) { |
db63af51 |
2211 | check_i(po, po->btj->d[j].bt_i); |
e83ea7ed |
2212 | ret |= scan_for_pop(po->btj->d[j].bt_i, opcnt, magic, reg, |
4c45fa73 |
2213 | depth, maxdepth, do_flags); |
2214 | if (ret < 0) |
2215 | return ret; // dead end |
2216 | } |
da87ae38 |
2217 | return ret; |
4c45fa73 |
2218 | } |
2219 | |
db63af51 |
2220 | check_i(po, po->bt_i); |
5c024ef7 |
2221 | if (po->flags & OPF_CJMP) { |
e83ea7ed |
2222 | ret |= scan_for_pop(po->bt_i, opcnt, magic, reg, |
d4e3b5db |
2223 | depth, maxdepth, do_flags); |
87bf6cec |
2224 | if (ret < 0) |
2225 | return ret; // dead end |
2226 | } |
2227 | else { |
2228 | i = po->bt_i - 1; |
2229 | } |
2230 | continue; |
2231 | } |
2232 | |
e83ea7ed |
2233 | relevant = 0; |
d4e3b5db |
2234 | if ((po->op == OP_POP || po->op == OP_PUSH) |
e83ea7ed |
2235 | && po->operand[0].type == OPT_REG && po->operand[0].reg == reg) |
87bf6cec |
2236 | { |
e83ea7ed |
2237 | relevant = 1; |
2238 | } |
2239 | |
2240 | if (po->op == OP_PUSH) { |
2241 | depth++; |
2242 | if (relevant) { |
d4e3b5db |
2243 | if (depth > *maxdepth) |
2244 | *maxdepth = depth; |
2245 | if (do_flags) |
7ae48d73 |
2246 | op_set_clear_flag(po, OPF_RSAVE, OPF_RMD); |
d4e3b5db |
2247 | } |
e83ea7ed |
2248 | } |
2249 | else if (po->op == OP_POP) { |
2250 | if (depth == 0) { |
2251 | if (relevant && do_flags) |
2252 | op_set_clear_flag(po, OPF_RMD, OPF_RSAVE); |
2253 | return 1; |
2254 | } |
2255 | else { |
2256 | depth--; |
2257 | if (depth < 0) // should not happen |
2258 | ferr(po, "fail with depth\n"); |
2259 | if (do_flags) |
2260 | op_set_clear_flag(po, OPF_RSAVE, OPF_RMD); |
d4e3b5db |
2261 | } |
87bf6cec |
2262 | } |
850c9265 |
2263 | } |
2264 | |
87bf6cec |
2265 | return ret; |
850c9265 |
2266 | } |
2267 | |
e83ea7ed |
2268 | // scan for 'reg' pop backwards starting from i |
2269 | // intended to use for register restore search, so other reg |
2270 | // references are considered an error |
2271 | static int scan_for_rsave_pop_reg(int i, int magic, int reg, int set_flags) |
850c9265 |
2272 | { |
e83ea7ed |
2273 | struct parsed_op *po; |
2274 | struct label_ref *lr; |
2275 | int ret = 0; |
2276 | |
2277 | ops[i].cc_scratch = magic; |
2278 | |
2279 | while (1) |
2280 | { |
2281 | if (g_labels[i] != NULL) { |
2282 | lr = &g_label_refs[i]; |
2283 | for (; lr != NULL; lr = lr->next) { |
2284 | check_i(&ops[i], lr->i); |
2285 | ret |= scan_for_rsave_pop_reg(lr->i, magic, reg, set_flags); |
2286 | if (ret < 0) |
2287 | return ret; |
2288 | } |
2289 | if (i > 0 && LAST_OP(i - 1)) |
2290 | return ret; |
2291 | } |
2292 | |
2293 | i--; |
2294 | if (i < 0) |
2295 | break; |
2296 | |
2297 | if (ops[i].cc_scratch == magic) |
2298 | return ret; |
2299 | ops[i].cc_scratch = magic; |
2300 | |
2301 | po = &ops[i]; |
2302 | if (po->op == OP_POP && po->operand[0].reg == reg) { |
2303 | if (po->flags & (OPF_RMD|OPF_DONE)) |
2304 | return -1; |
2305 | |
2306 | po->flags |= set_flags; |
2307 | return 1; |
2308 | } |
2309 | |
2310 | // this also covers the case where we reach corresponding push |
2311 | if ((po->regmask_dst | po->regmask_src) & (1 << reg)) |
2312 | return -1; |
2313 | } |
2314 | |
2315 | // nothing interesting on this path |
2316 | return 0; |
2317 | } |
2318 | |
2319 | static void find_reachable_exits(int i, int opcnt, int magic, |
2320 | int *exits, int *exit_count) |
2321 | { |
2322 | struct parsed_op *po; |
850c9265 |
2323 | int j; |
2324 | |
e83ea7ed |
2325 | for (; i < opcnt; i++) |
2326 | { |
2327 | po = &ops[i]; |
2328 | if (po->cc_scratch == magic) |
2329 | return; |
2330 | po->cc_scratch = magic; |
2331 | |
2332 | if (po->flags & OPF_TAIL) { |
2333 | ferr_assert(po, *exit_count < MAX_EXITS); |
2334 | exits[*exit_count] = i; |
2335 | (*exit_count)++; |
2336 | return; |
2337 | } |
850c9265 |
2338 | |
e83ea7ed |
2339 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
2340 | if (po->flags & OPF_RMD) |
69a3cdfc |
2341 | continue; |
850c9265 |
2342 | |
e83ea7ed |
2343 | if (po->btj != NULL) { |
2344 | for (j = 0; j < po->btj->count; j++) { |
2345 | check_i(po, po->btj->d[j].bt_i); |
2346 | find_reachable_exits(po->btj->d[j].bt_i, opcnt, magic, |
2347 | exits, exit_count); |
2348 | } |
2349 | return; |
850c9265 |
2350 | } |
2351 | |
e83ea7ed |
2352 | check_i(po, po->bt_i); |
2353 | if (po->flags & OPF_CJMP) |
2354 | find_reachable_exits(po->bt_i, opcnt, magic, exits, exit_count); |
2355 | else |
2356 | i = po->bt_i - 1; |
2357 | continue; |
850c9265 |
2358 | } |
2359 | } |
e83ea7ed |
2360 | } |
2361 | |
2362 | // scan for 'reg' pop backwards starting from exits (all paths) |
2363 | static int scan_for_pop_ret(int i, int opcnt, int reg, int set_flags) |
2364 | { |
2365 | static int exits[MAX_EXITS]; |
2366 | static int exit_count; |
2367 | int j, ret; |
850c9265 |
2368 | |
e83ea7ed |
2369 | if (!set_flags) { |
2370 | exit_count = 0; |
2371 | find_reachable_exits(i, opcnt, i + opcnt * 15, exits, |
2372 | &exit_count); |
2373 | ferr_assert(&ops[i], exit_count > 0); |
2374 | } |
2375 | |
2376 | for (j = 0; j < exit_count; j++) { |
2377 | ret = scan_for_rsave_pop_reg(exits[j], i + opcnt * 16 + set_flags, |
2378 | reg, set_flags); |
2379 | if (ret == -1) |
2380 | return -1; |
2381 | } |
2382 | |
2383 | return 0; |
850c9265 |
2384 | } |
2385 | |
e83ea7ed |
2386 | // scan for one or more pop of push <const> |
2387 | static int scan_for_pop_const_r(int i, int opcnt, int magic, |
2388 | int push_i, int is_probe) |
9af2d373 |
2389 | { |
25a330eb |
2390 | struct parsed_op *po; |
e83ea7ed |
2391 | struct label_ref *lr; |
2392 | int ret = 0; |
9af2d373 |
2393 | int j; |
2394 | |
e83ea7ed |
2395 | for (; i < opcnt; i++) |
2396 | { |
2397 | po = &ops[i]; |
2398 | if (po->cc_scratch == magic) |
2399 | return ret; // already checked |
2400 | po->cc_scratch = magic; |
2401 | |
2402 | if (po->flags & OPF_JMP) { |
2403 | if (po->flags & OPF_RMD) |
2404 | continue; |
2405 | if (po->op == OP_CALL) |
2406 | return -1; |
2407 | |
2408 | if (po->btj != NULL) { |
2409 | for (j = 0; j < po->btj->count; j++) { |
2410 | check_i(po, po->btj->d[j].bt_i); |
2411 | ret |= scan_for_pop_const_r(po->btj->d[j].bt_i, opcnt, magic, |
2412 | push_i, is_probe); |
2413 | if (ret < 0) |
2414 | return ret; |
2415 | } |
2416 | return ret; |
2417 | } |
25a330eb |
2418 | |
e83ea7ed |
2419 | check_i(po, po->bt_i); |
2420 | if (po->flags & OPF_CJMP) { |
2421 | ret |= scan_for_pop_const_r(po->bt_i, opcnt, magic, push_i, |
2422 | is_probe); |
2423 | if (ret < 0) |
2424 | return ret; |
2425 | } |
2426 | else { |
2427 | i = po->bt_i - 1; |
2428 | } |
25a330eb |
2429 | continue; |
2430 | } |
2431 | |
e83ea7ed |
2432 | if ((po->flags & (OPF_TAIL|OPF_RSAVE)) || po->op == OP_PUSH) |
2433 | return -1; |
2434 | |
2435 | if (g_labels[i] != NULL) { |
2436 | // all refs must be visited |
2437 | lr = &g_label_refs[i]; |
2438 | for (; lr != NULL; lr = lr->next) { |
2439 | check_i(po, lr->i); |
2440 | if (ops[lr->i].cc_scratch != magic) |
2441 | return -1; |
2442 | } |
2443 | if (i > 0 && !LAST_OP(i - 1) && ops[i - 1].cc_scratch != magic) |
2444 | return -1; |
2445 | } |
2446 | |
2447 | if (po->op == OP_POP) |
9af2d373 |
2448 | { |
e83ea7ed |
2449 | if (po->flags & (OPF_RMD|OPF_DONE)) |
2450 | return -1; |
2451 | |
2452 | if (!is_probe) { |
2453 | po->flags |= OPF_DONE; |
2454 | po->datap = &ops[push_i]; |
2455 | } |
2456 | return 1; |
9af2d373 |
2457 | } |
e83ea7ed |
2458 | } |
9af2d373 |
2459 | |
e83ea7ed |
2460 | return -1; |
2461 | } |
25a330eb |
2462 | |
e83ea7ed |
2463 | static void scan_for_pop_const(int i, int opcnt, int magic) |
2464 | { |
2465 | int ret; |
2466 | |
2467 | ret = scan_for_pop_const_r(i + 1, opcnt, magic, i, 1); |
2468 | if (ret == 1) { |
2469 | ops[i].flags |= OPF_RMD | OPF_DONE; |
2470 | scan_for_pop_const_r(i + 1, opcnt, magic + 1, i, 0); |
2471 | } |
2472 | } |
2473 | |
2474 | // check if all branch targets within a marked path are also marked |
2475 | // note: the path checked must not be empty or end with a branch |
2476 | static int check_path_branches(int opcnt, int magic) |
2477 | { |
2478 | struct parsed_op *po; |
2479 | int i, j; |
2480 | |
2481 | for (i = 0; i < opcnt; i++) { |
2482 | po = &ops[i]; |
2483 | if (po->cc_scratch != magic) |
2484 | continue; |
2485 | |
2486 | if (po->flags & OPF_JMP) { |
2487 | if ((po->flags & OPF_RMD) || po->op == OP_CALL) |
2488 | continue; |
2489 | |
2490 | if (po->btj != NULL) { |
2491 | for (j = 0; j < po->btj->count; j++) { |
2492 | check_i(po, po->btj->d[j].bt_i); |
2493 | if (ops[po->btj->d[j].bt_i].cc_scratch != magic) |
2494 | return 0; |
2495 | } |
25a330eb |
2496 | } |
e83ea7ed |
2497 | |
2498 | check_i(po, po->bt_i); |
2499 | if (ops[po->bt_i].cc_scratch != magic) |
2500 | return 0; |
2501 | if ((po->flags & OPF_CJMP) && ops[i + 1].cc_scratch != magic) |
2502 | return 0; |
2503 | } |
2504 | } |
2505 | |
2506 | return 1; |
2507 | } |
2508 | |
2509 | // scan for multiple pushes for given pop |
2510 | static int scan_pushes_for_pop_r(int i, int magic, int pop_i, |
2511 | int is_probe) |
2512 | { |
2513 | int reg = ops[pop_i].operand[0].reg; |
2514 | struct parsed_op *po; |
2515 | struct label_ref *lr; |
2516 | int ret = 0; |
2517 | |
2518 | ops[i].cc_scratch = magic; |
2519 | |
2520 | while (1) |
2521 | { |
2522 | if (g_labels[i] != NULL) { |
2523 | lr = &g_label_refs[i]; |
2524 | for (; lr != NULL; lr = lr->next) { |
2525 | check_i(&ops[i], lr->i); |
2526 | ret |= scan_pushes_for_pop_r(lr->i, magic, pop_i, is_probe); |
2527 | if (ret < 0) |
2528 | return ret; |
25a330eb |
2529 | } |
e83ea7ed |
2530 | if (i > 0 && LAST_OP(i - 1)) |
2531 | return ret; |
2532 | } |
2533 | |
2534 | i--; |
2535 | if (i < 0) |
9af2d373 |
2536 | break; |
e83ea7ed |
2537 | |
2538 | if (ops[i].cc_scratch == magic) |
2539 | return ret; |
2540 | ops[i].cc_scratch = magic; |
2541 | |
2542 | po = &ops[i]; |
2543 | if (po->op == OP_CALL) |
2544 | return -1; |
2545 | if ((po->flags & (OPF_TAIL|OPF_RSAVE)) || po->op == OP_POP) |
2546 | return -1; |
2547 | |
2548 | if (po->op == OP_PUSH) |
2549 | { |
2550 | if (po->datap != NULL) |
2551 | return -1; |
2552 | if (po->operand[0].type == OPT_REG && po->operand[0].reg == reg) |
2553 | // leave this case for reg save/restore handlers |
2554 | return -1; |
2555 | |
2556 | if (!is_probe) { |
2557 | po->flags |= OPF_PPUSH | OPF_DONE; |
2558 | po->datap = &ops[pop_i]; |
2559 | } |
2560 | return 1; |
2561 | } |
2562 | } |
2563 | |
2564 | return -1; |
2565 | } |
2566 | |
2567 | static void scan_pushes_for_pop(int i, int opcnt, int *regmask_pp) |
2568 | { |
2569 | int magic = i + opcnt * 14; |
2570 | int ret; |
2571 | |
2572 | ret = scan_pushes_for_pop_r(i, magic, i, 1); |
2573 | if (ret == 1) { |
2574 | ret = check_path_branches(opcnt, magic); |
2575 | if (ret == 1) { |
2576 | ops[i].flags |= OPF_PPUSH | OPF_DONE; |
2577 | *regmask_pp |= 1 << ops[i].operand[0].reg; |
2578 | scan_pushes_for_pop_r(i, magic + 1, i, 0); |
9af2d373 |
2579 | } |
2580 | } |
2581 | } |
2582 | |
591721d7 |
2583 | static void scan_propagate_df(int i, int opcnt) |
2584 | { |
2585 | struct parsed_op *po = &ops[i]; |
2586 | int j; |
2587 | |
2588 | for (; i < opcnt; i++) { |
2589 | po = &ops[i]; |
2590 | if (po->flags & OPF_DF) |
2591 | return; // already resolved |
2592 | po->flags |= OPF_DF; |
2593 | |
2594 | if (po->op == OP_CALL) |
2595 | ferr(po, "call with DF set?\n"); |
2596 | |
2597 | if (po->flags & OPF_JMP) { |
2598 | if (po->btj != NULL) { |
2599 | // jumptable |
db63af51 |
2600 | for (j = 0; j < po->btj->count; j++) { |
2601 | check_i(po, po->btj->d[j].bt_i); |
591721d7 |
2602 | scan_propagate_df(po->btj->d[j].bt_i, opcnt); |
db63af51 |
2603 | } |
591721d7 |
2604 | return; |
2605 | } |
2606 | |
db63af51 |
2607 | check_i(po, po->bt_i); |
5c024ef7 |
2608 | if (po->flags & OPF_CJMP) |
591721d7 |
2609 | scan_propagate_df(po->bt_i, opcnt); |
2610 | else |
2611 | i = po->bt_i - 1; |
2612 | continue; |
2613 | } |
2614 | |
2615 | if (po->flags & OPF_TAIL) |
2616 | break; |
2617 | |
2618 | if (po->op == OP_CLD) { |
5e49b270 |
2619 | po->flags |= OPF_RMD | OPF_DONE; |
591721d7 |
2620 | return; |
2621 | } |
2622 | } |
2623 | |
2624 | ferr(po, "missing DF clear?\n"); |
2625 | } |
2626 | |
db63af51 |
2627 | // is operand 'opr' referenced by parsed_op 'po'? |
2628 | static int is_opr_referenced(const struct parsed_opr *opr, |
2629 | const struct parsed_op *po) |
2630 | { |
2631 | int i, mask; |
2632 | |
2633 | if (opr->type == OPT_REG) { |
2634 | mask = po->regmask_dst | po->regmask_src; |
2635 | if (po->op == OP_CALL) |
2636 | mask |= (1 << xAX) | (1 << xCX) | (1 << xDX); |
2637 | if ((1 << opr->reg) & mask) |
2638 | return 1; |
2639 | else |
2640 | return 0; |
2641 | } |
2642 | |
2643 | for (i = 0; i < po->operand_cnt; i++) |
2644 | if (IS(po->operand[0].name, opr->name)) |
2645 | return 1; |
2646 | |
2647 | return 0; |
2648 | } |
2649 | |
2650 | // is operand 'opr' read by parsed_op 'po'? |
2651 | static int is_opr_read(const struct parsed_opr *opr, |
2652 | const struct parsed_op *po) |
2653 | { |
2654 | int mask; |
2655 | |
2656 | if (opr->type == OPT_REG) { |
2657 | mask = po->regmask_src; |
2658 | if (po->op == OP_CALL) |
2659 | // assume worst case |
2660 | mask |= (1 << xAX) | (1 << xCX) | (1 << xDX); |
2661 | if ((1 << opr->reg) & mask) |
2662 | return 1; |
2663 | else |
2664 | return 0; |
2665 | } |
2666 | |
2667 | // yes I'm lazy |
2668 | return 0; |
2669 | } |
2670 | |
1cd4a663 |
2671 | // is operand 'opr' modified by parsed_op 'po'? |
5101a5f9 |
2672 | static int is_opr_modified(const struct parsed_opr *opr, |
69a3cdfc |
2673 | const struct parsed_op *po) |
2674 | { |
89ff3147 |
2675 | int mask; |
2676 | |
db63af51 |
2677 | if (!(po->flags & OPF_DATA)) |
69a3cdfc |
2678 | return 0; |
2679 | |
89ff3147 |
2680 | if (opr->type == OPT_REG) { |
2681 | if (po->op == OP_CALL) { |
2682 | mask = (1 << xAX) | (1 << xCX) | (1 << xDX); |
2683 | if ((1 << opr->reg) & mask) |
2684 | return 1; |
2685 | else |
2686 | return 0; |
2687 | } |
2688 | |
2689 | if (po->operand[0].type == OPT_REG) { |
2690 | if (po->regmask_dst & (1 << opr->reg)) |
2691 | return 1; |
2692 | else |
2693 | return 0; |
2694 | } |
69a3cdfc |
2695 | } |
2696 | |
2697 | return IS(po->operand[0].name, opr->name); |
2698 | } |
2699 | |
5101a5f9 |
2700 | // is any operand of parsed_op 'po_test' modified by parsed_op 'po'? |
2701 | static int is_any_opr_modified(const struct parsed_op *po_test, |
89ff3147 |
2702 | const struct parsed_op *po, int c_mode) |
5101a5f9 |
2703 | { |
89ff3147 |
2704 | int mask; |
5101a5f9 |
2705 | int i; |
2706 | |
2707 | if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA)) |
2708 | return 0; |
2709 | |
de50b98b |
2710 | if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST) |
2711 | return 0; |
2712 | |
2713 | if ((po_test->regmask_src | po_test->regmask_dst) & po->regmask_dst) |
2714 | return 1; |
2715 | |
2716 | // in reality, it can wreck any register, but in decompiled C |
2b43685d |
2717 | // version it can only overwrite eax or edx:eax |
89ff3147 |
2718 | mask = (1 << xAX) | (1 << xDX); |
2719 | if (!c_mode) |
2720 | mask |= 1 << xCX; |
2721 | |
de50b98b |
2722 | if (po->op == OP_CALL |
89ff3147 |
2723 | && ((po_test->regmask_src | po_test->regmask_dst) & mask)) |
5101a5f9 |
2724 | return 1; |
2725 | |
2726 | for (i = 0; i < po_test->operand_cnt; i++) |
2727 | if (IS(po_test->operand[i].name, po->operand[0].name)) |
2728 | return 1; |
2729 | |
2730 | return 0; |
2731 | } |
2732 | |
940e8e66 |
2733 | // scan for any po_test operand modification in range given |
89ff3147 |
2734 | static int scan_for_mod(struct parsed_op *po_test, int i, int opcnt, |
2735 | int c_mode) |
69a3cdfc |
2736 | { |
2b43685d |
2737 | if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST) |
2738 | return -1; |
2739 | |
69a3cdfc |
2740 | for (; i < opcnt; i++) { |
89ff3147 |
2741 | if (is_any_opr_modified(po_test, &ops[i], c_mode)) |
69a3cdfc |
2742 | return i; |
2743 | } |
2744 | |
2745 | return -1; |
2746 | } |
2747 | |
940e8e66 |
2748 | // scan for po_test operand[0] modification in range given |
2749 | static int scan_for_mod_opr0(struct parsed_op *po_test, |
2750 | int i, int opcnt) |
2751 | { |
2752 | for (; i < opcnt; i++) { |
2753 | if (is_opr_modified(&po_test->operand[0], &ops[i])) |
2754 | return i; |
2755 | } |
2756 | |
2757 | return -1; |
2758 | } |
2759 | |
04f8a628 |
2760 | static int scan_for_flag_set(int i, int magic, int *branched, |
2761 | int *setters, int *setter_cnt) |
69a3cdfc |
2762 | { |
04f8a628 |
2763 | struct label_ref *lr; |
2b43685d |
2764 | int ret; |
de50b98b |
2765 | |
2766 | while (i >= 0) { |
04f8a628 |
2767 | if (ops[i].cc_scratch == magic) { |
04abc5d6 |
2768 | // is this a problem? |
2769 | //ferr(&ops[i], "%s looped\n", __func__); |
2770 | return 0; |
04f8a628 |
2771 | } |
2772 | ops[i].cc_scratch = magic; |
2773 | |
d7857c3a |
2774 | if (g_labels[i] != NULL) { |
2b43685d |
2775 | *branched = 1; |
04f8a628 |
2776 | |
2777 | lr = &g_label_refs[i]; |
2778 | for (; lr->next; lr = lr->next) { |
92d715b6 |
2779 | check_i(&ops[i], lr->i); |
04f8a628 |
2780 | ret = scan_for_flag_set(lr->i, magic, |
2781 | branched, setters, setter_cnt); |
2782 | if (ret < 0) |
2783 | return ret; |
2784 | } |
2785 | |
92d715b6 |
2786 | check_i(&ops[i], lr->i); |
de50b98b |
2787 | if (i > 0 && LAST_OP(i - 1)) { |
94d447fb |
2788 | i = lr->i; |
de50b98b |
2789 | continue; |
2790 | } |
04f8a628 |
2791 | ret = scan_for_flag_set(lr->i, magic, |
2792 | branched, setters, setter_cnt); |
2b43685d |
2793 | if (ret < 0) |
2794 | return ret; |
de50b98b |
2795 | } |
2796 | i--; |
2797 | |
2b43685d |
2798 | if (ops[i].flags & OPF_FLAGS) { |
2799 | setters[*setter_cnt] = i; |
2800 | (*setter_cnt)++; |
2801 | return 0; |
2802 | } |
69a3cdfc |
2803 | |
5c024ef7 |
2804 | if ((ops[i].flags & (OPF_JMP|OPF_CJMP)) == OPF_JMP) |
69a3cdfc |
2805 | return -1; |
69a3cdfc |
2806 | } |
2807 | |
2808 | return -1; |
2809 | } |
2810 | |
5101a5f9 |
2811 | // scan back for cdq, if anything modifies edx, fail |
2812 | static int scan_for_cdq_edx(int i) |
2813 | { |
cdfaeed7 |
2814 | while (i >= 0) { |
d7857c3a |
2815 | if (g_labels[i] != NULL) { |
cdfaeed7 |
2816 | if (g_label_refs[i].next != NULL) |
2817 | return -1; |
2818 | if (i > 0 && LAST_OP(i - 1)) { |
2819 | i = g_label_refs[i].i; |
2820 | continue; |
2821 | } |
2822 | return -1; |
2823 | } |
2824 | i--; |
2825 | |
5101a5f9 |
2826 | if (ops[i].op == OP_CDQ) |
2827 | return i; |
2828 | |
2829 | if (ops[i].regmask_dst & (1 << xDX)) |
2830 | return -1; |
5101a5f9 |
2831 | } |
2832 | |
2833 | return -1; |
2834 | } |
2835 | |
64c59faf |
2836 | static int scan_for_reg_clear(int i, int reg) |
2837 | { |
cdfaeed7 |
2838 | while (i >= 0) { |
d7857c3a |
2839 | if (g_labels[i] != NULL) { |
cdfaeed7 |
2840 | if (g_label_refs[i].next != NULL) |
2841 | return -1; |
2842 | if (i > 0 && LAST_OP(i - 1)) { |
2843 | i = g_label_refs[i].i; |
2844 | continue; |
2845 | } |
2846 | return -1; |
2847 | } |
2848 | i--; |
2849 | |
64c59faf |
2850 | if (ops[i].op == OP_XOR |
2851 | && ops[i].operand[0].lmod == OPLM_DWORD |
2852 | && ops[i].operand[0].reg == ops[i].operand[1].reg |
2853 | && ops[i].operand[0].reg == reg) |
2854 | return i; |
2855 | |
2856 | if (ops[i].regmask_dst & (1 << reg)) |
2857 | return -1; |
64c59faf |
2858 | } |
2859 | |
2860 | return -1; |
2861 | } |
2862 | |
ee2361b9 |
2863 | static void patch_esp_adjust(struct parsed_op *po, int adj) |
2864 | { |
2865 | ferr_assert(po, po->op == OP_ADD); |
2866 | ferr_assert(po, IS(opr_name(po, 0), "esp")); |
2867 | ferr_assert(po, po->operand[1].type == OPT_CONST); |
2868 | |
2869 | // this is a bit of a hack, but deals with use of |
2870 | // single adj for multiple calls |
2871 | po->operand[1].val -= adj; |
2872 | po->flags |= OPF_RMD; |
2873 | if (po->operand[1].val == 0) |
2874 | po->flags |= OPF_DONE; |
2875 | ferr_assert(po, (int)po->operand[1].val >= 0); |
2876 | } |
2877 | |
1bafb621 |
2878 | // scan for positive, constant esp adjust |
ee2361b9 |
2879 | // multipath case is preliminary |
9af2d373 |
2880 | static int scan_for_esp_adjust(int i, int opcnt, |
ee2361b9 |
2881 | int adj_expect, int *adj, int *is_multipath, int do_update) |
1bafb621 |
2882 | { |
bfacdc83 |
2883 | int adj_expect_unknown = 0; |
7ba45c34 |
2884 | struct parsed_op *po; |
46411e6c |
2885 | int first_pop = -1; |
bfacdc83 |
2886 | int adj_best = 0; |
4741fdfe |
2887 | |
ee2361b9 |
2888 | *adj = *is_multipath = 0; |
bfacdc83 |
2889 | if (adj_expect < 0) { |
2890 | adj_expect_unknown = 1; |
2891 | adj_expect = 32 * 4; // enough? |
2892 | } |
7ba45c34 |
2893 | |
9af2d373 |
2894 | for (; i < opcnt && *adj < adj_expect; i++) { |
d7857c3a |
2895 | if (g_labels[i] != NULL) |
ee2361b9 |
2896 | *is_multipath = 1; |
a2c1d768 |
2897 | |
5e49b270 |
2898 | po = &ops[i]; |
2899 | if (po->flags & OPF_DONE) |
2900 | continue; |
2901 | |
7ba45c34 |
2902 | if (po->op == OP_ADD && po->operand[0].reg == xSP) { |
2903 | if (po->operand[1].type != OPT_CONST) |
1bafb621 |
2904 | ferr(&ops[i], "non-const esp adjust?\n"); |
7ba45c34 |
2905 | *adj += po->operand[1].val; |
1bafb621 |
2906 | if (*adj & 3) |
2907 | ferr(&ops[i], "unaligned esp adjust: %x\n", *adj); |
ee2361b9 |
2908 | if (do_update) { |
2909 | if (!*is_multipath) |
2910 | patch_esp_adjust(po, adj_expect); |
2911 | else |
2912 | po->flags |= OPF_RMD; |
2913 | } |
1bafb621 |
2914 | return i; |
2915 | } |
5e49b270 |
2916 | else if (po->op == OP_PUSH) { |
5c024ef7 |
2917 | //if (first_pop == -1) |
2918 | // first_pop = -2; // none |
7ba45c34 |
2919 | *adj -= lmod_bytes(po, po->operand[0].lmod); |
46411e6c |
2920 | } |
5e49b270 |
2921 | else if (po->op == OP_POP) { |
91ca764a |
2922 | if (!(po->flags & OPF_DONE)) { |
2923 | // seems like msvc only uses 'pop ecx' for stack realignment.. |
2924 | if (po->operand[0].type != OPT_REG || po->operand[0].reg != xCX) |
2925 | break; |
2926 | if (first_pop == -1 && *adj >= 0) |
2927 | first_pop = i; |
2928 | } |
ee2361b9 |
2929 | if (do_update && *adj >= 0) { |
2930 | po->flags |= OPF_RMD; |
2931 | if (!*is_multipath) |
2932 | po->flags |= OPF_DONE; |
2933 | } |
2934 | |
7ba45c34 |
2935 | *adj += lmod_bytes(po, po->operand[0].lmod); |
bfacdc83 |
2936 | if (*adj > adj_best) |
2937 | adj_best = *adj; |
46411e6c |
2938 | } |
e56ab892 |
2939 | else if (po->flags & (OPF_JMP|OPF_TAIL)) { |
4741fdfe |
2940 | if (po->op == OP_JMP && po->btj == NULL) { |
5e49b270 |
2941 | if (po->bt_i <= i) |
2942 | break; |
4741fdfe |
2943 | i = po->bt_i - 1; |
2944 | continue; |
2945 | } |
e56ab892 |
2946 | if (po->op != OP_CALL) |
a2c1d768 |
2947 | break; |
e56ab892 |
2948 | if (po->operand[0].type != OPT_LABEL) |
a2c1d768 |
2949 | break; |
91ca764a |
2950 | if (po->pp != NULL && po->pp->is_stdcall) |
89ff3147 |
2951 | break; |
bfacdc83 |
2952 | if (adj_expect_unknown && first_pop >= 0) |
2953 | break; |
91ca764a |
2954 | // assume it's another cdecl call |
e56ab892 |
2955 | } |
a2c1d768 |
2956 | } |
7ba45c34 |
2957 | |
108e9fe3 |
2958 | if (first_pop >= 0) { |
bfacdc83 |
2959 | // probably only 'pop ecx' was used |
2960 | *adj = adj_best; |
46411e6c |
2961 | return first_pop; |
1bafb621 |
2962 | } |
2963 | |
2964 | return -1; |
2965 | } |
2966 | |
a3684be1 |
2967 | static void scan_fwd_set_flags(int i, int opcnt, int magic, int flags) |
2968 | { |
2969 | struct parsed_op *po; |
2970 | int j; |
2971 | |
2972 | if (i < 0) |
2973 | ferr(ops, "%s: followed bad branch?\n", __func__); |
2974 | |
2975 | for (; i < opcnt; i++) { |
2976 | po = &ops[i]; |
2977 | if (po->cc_scratch == magic) |
2978 | return; |
2979 | po->cc_scratch = magic; |
2980 | po->flags |= flags; |
2981 | |
2982 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
2983 | if (po->btj != NULL) { |
2984 | // jumptable |
2985 | for (j = 0; j < po->btj->count; j++) |
2986 | scan_fwd_set_flags(po->btj->d[j].bt_i, opcnt, magic, flags); |
2987 | return; |
2988 | } |
2989 | |
2990 | scan_fwd_set_flags(po->bt_i, opcnt, magic, flags); |
5c024ef7 |
2991 | if (!(po->flags & OPF_CJMP)) |
a3684be1 |
2992 | return; |
2993 | } |
2994 | if (po->flags & OPF_TAIL) |
2995 | return; |
2996 | } |
2997 | } |
2998 | |
1cd4a663 |
2999 | static const struct parsed_proto *try_recover_pp( |
da87ae38 |
3000 | struct parsed_op *po, const struct parsed_opr *opr, int *search_instead) |
1cd4a663 |
3001 | { |
3002 | const struct parsed_proto *pp = NULL; |
89ff3147 |
3003 | char buf[256]; |
3004 | char *p; |
1cd4a663 |
3005 | |
3006 | // maybe an arg of g_func? |
3007 | if (opr->type == OPT_REGMEM && is_stack_access(po, opr)) |
3008 | { |
3009 | char ofs_reg[16] = { 0, }; |
3010 | int arg, arg_s, arg_i; |
3011 | int stack_ra = 0; |
3012 | int offset = 0; |
3013 | |
9af2d373 |
3014 | if (g_header_mode) |
3015 | return NULL; |
3016 | |
1cd4a663 |
3017 | parse_stack_access(po, opr->name, ofs_reg, |
037f4971 |
3018 | &offset, &stack_ra, NULL, 0); |
1cd4a663 |
3019 | if (ofs_reg[0] != 0) |
3020 | ferr(po, "offset reg on arg access?\n"); |
da87ae38 |
3021 | if (offset <= stack_ra) { |
3022 | // search who set the stack var instead |
3023 | if (search_instead != NULL) |
3024 | *search_instead = 1; |
3025 | return NULL; |
3026 | } |
1cd4a663 |
3027 | |
3028 | arg_i = (offset - stack_ra - 4) / 4; |
3029 | for (arg = arg_s = 0; arg < g_func_pp->argc; arg++) { |
3030 | if (g_func_pp->arg[arg].reg != NULL) |
3031 | continue; |
3032 | if (arg_s == arg_i) |
3033 | break; |
3034 | arg_s++; |
3035 | } |
3036 | if (arg == g_func_pp->argc) |
3037 | ferr(po, "stack arg %d not in prototype?\n", arg_i); |
3038 | |
3039 | pp = g_func_pp->arg[arg].fptr; |
3040 | if (pp == NULL) |
46411e6c |
3041 | ferr(po, "icall sa: arg%d is not a fptr?\n", arg + 1); |
89ff3147 |
3042 | check_func_pp(po, pp, "icall arg"); |
3043 | } |
3044 | else if (opr->type == OPT_REGMEM && strchr(opr->name + 1, '[')) { |
3045 | // label[index] |
3046 | p = strchr(opr->name + 1, '['); |
3047 | memcpy(buf, opr->name, p - opr->name); |
3048 | buf[p - opr->name] = 0; |
92d715b6 |
3049 | pp = proto_parse(g_fhdr, buf, g_quiet_pp); |
1cd4a663 |
3050 | } |
3051 | else if (opr->type == OPT_OFFSET || opr->type == OPT_LABEL) { |
9af2d373 |
3052 | pp = proto_parse(g_fhdr, opr->name, g_quiet_pp); |
3053 | if (pp == NULL) { |
3054 | if (!g_header_mode) |
3055 | ferr(po, "proto_parse failed for icall to '%s'\n", opr->name); |
3056 | } |
3057 | else |
3058 | check_func_pp(po, pp, "reg-fptr ref"); |
1cd4a663 |
3059 | } |
3060 | |
3061 | return pp; |
3062 | } |
3063 | |
da87ae38 |
3064 | static void scan_for_call_type(int i, const struct parsed_opr *opr, |
db63af51 |
3065 | int magic, const struct parsed_proto **pp_found, int *pp_i, |
3066 | int *multi) |
1cd4a663 |
3067 | { |
3068 | const struct parsed_proto *pp = NULL; |
3069 | struct parsed_op *po; |
3070 | struct label_ref *lr; |
3071 | |
037f4971 |
3072 | ops[i].cc_scratch = magic; |
1cd4a663 |
3073 | |
037f4971 |
3074 | while (1) { |
d7857c3a |
3075 | if (g_labels[i] != NULL) { |
1cd4a663 |
3076 | lr = &g_label_refs[i]; |
92d715b6 |
3077 | for (; lr != NULL; lr = lr->next) { |
3078 | check_i(&ops[i], lr->i); |
db63af51 |
3079 | scan_for_call_type(lr->i, opr, magic, pp_found, pp_i, multi); |
92d715b6 |
3080 | } |
46411e6c |
3081 | if (i > 0 && LAST_OP(i - 1)) |
3082 | return; |
1cd4a663 |
3083 | } |
037f4971 |
3084 | |
1cd4a663 |
3085 | i--; |
037f4971 |
3086 | if (i < 0) |
3087 | break; |
3088 | |
3089 | if (ops[i].cc_scratch == magic) |
3090 | return; |
3091 | ops[i].cc_scratch = magic; |
1cd4a663 |
3092 | |
3093 | if (!(ops[i].flags & OPF_DATA)) |
3094 | continue; |
3095 | if (!is_opr_modified(opr, &ops[i])) |
3096 | continue; |
3097 | if (ops[i].op != OP_MOV && ops[i].op != OP_LEA) { |
3098 | // most probably trashed by some processing |
3099 | *pp_found = NULL; |
3100 | return; |
3101 | } |
3102 | |
3103 | opr = &ops[i].operand[1]; |
3104 | if (opr->type != OPT_REG) |
3105 | break; |
3106 | } |
3107 | |
3108 | po = (i >= 0) ? &ops[i] : ops; |
3109 | |
3110 | if (i < 0) { |
3111 | // reached the top - can only be an arg-reg |
04abc5d6 |
3112 | if (opr->type != OPT_REG || g_func_pp == NULL) |
1cd4a663 |
3113 | return; |
3114 | |
3115 | for (i = 0; i < g_func_pp->argc; i++) { |
3116 | if (g_func_pp->arg[i].reg == NULL) |
3117 | continue; |
3118 | if (IS(opr->name, g_func_pp->arg[i].reg)) |
3119 | break; |
3120 | } |
3121 | if (i == g_func_pp->argc) |
3122 | return; |
3123 | pp = g_func_pp->arg[i].fptr; |
3124 | if (pp == NULL) |
46411e6c |
3125 | ferr(po, "icall: arg%d (%s) is not a fptr?\n", |
3126 | i + 1, g_func_pp->arg[i].reg); |
89ff3147 |
3127 | check_func_pp(po, pp, "icall reg-arg"); |
1cd4a663 |
3128 | } |
3129 | else |
da87ae38 |
3130 | pp = try_recover_pp(po, opr, NULL); |
1cd4a663 |
3131 | |
89ff3147 |
3132 | if (*pp_found != NULL && pp != NULL && *pp_found != pp) { |
1cd4a663 |
3133 | if (!IS((*pp_found)->ret_type.name, pp->ret_type.name) |
3134 | || (*pp_found)->is_stdcall != pp->is_stdcall |
89ff3147 |
3135 | || (*pp_found)->is_fptr != pp->is_fptr |
1cd4a663 |
3136 | || (*pp_found)->argc != pp->argc |
3137 | || (*pp_found)->argc_reg != pp->argc_reg |
3138 | || (*pp_found)->argc_stack != pp->argc_stack) |
3139 | { |
3140 | ferr(po, "icall: parsed_proto mismatch\n"); |
3141 | } |
89ff3147 |
3142 | *multi = 1; |
1cd4a663 |
3143 | } |
db63af51 |
3144 | if (pp != NULL) { |
1cd4a663 |
3145 | *pp_found = pp; |
db63af51 |
3146 | *pp_i = po - ops; |
3147 | } |
1cd4a663 |
3148 | } |
3149 | |
66bdb2b0 |
3150 | static void add_label_ref(struct label_ref *lr, int op_i) |
9af2d373 |
3151 | { |
66bdb2b0 |
3152 | struct label_ref *lr_new; |
9af2d373 |
3153 | |
66bdb2b0 |
3154 | if (lr->i == -1) { |
3155 | lr->i = op_i; |
3156 | return; |
3157 | } |
9af2d373 |
3158 | |
66bdb2b0 |
3159 | lr_new = calloc(1, sizeof(*lr_new)); |
3160 | lr_new->i = op_i; |
3161 | lr_new->next = lr->next; |
3162 | lr->next = lr_new; |
3163 | } |
3164 | |
3165 | static struct parsed_data *try_resolve_jumptab(int i, int opcnt) |
3166 | { |
3167 | struct parsed_op *po = &ops[i]; |
3168 | struct parsed_data *pd; |
3169 | char label[NAMELEN], *p; |
3170 | int len, j, l; |
3171 | |
3172 | p = strchr(po->operand[0].name, '['); |
3173 | if (p == NULL) |
3174 | return NULL; |
3175 | |
3176 | len = p - po->operand[0].name; |
3177 | strncpy(label, po->operand[0].name, len); |
3178 | label[len] = 0; |
3179 | |
3180 | for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) { |
3181 | if (IS(g_func_pd[j].label, label)) { |
3182 | pd = &g_func_pd[j]; |
3183 | break; |
3184 | } |
3185 | } |
3186 | if (pd == NULL) |
3187 | //ferr(po, "label '%s' not parsed?\n", label); |
3188 | return NULL; |
3189 | |
3190 | if (pd->type != OPT_OFFSET) |
3191 | ferr(po, "label '%s' with non-offset data?\n", label); |
3192 | |
3193 | // find all labels, link |
3194 | for (j = 0; j < pd->count; j++) { |
3195 | for (l = 0; l < opcnt; l++) { |
3196 | if (g_labels[l] != NULL && IS(g_labels[l], pd->d[j].u.label)) { |
3197 | add_label_ref(&g_label_refs[l], i); |
3198 | pd->d[j].bt_i = l; |
3199 | break; |
3200 | } |
3201 | } |
3202 | } |
3203 | |
3204 | return pd; |
3205 | } |
3206 | |
3207 | static void clear_labels(int count) |
3208 | { |
3209 | int i; |
3210 | |
3211 | for (i = 0; i < count; i++) { |
3212 | if (g_labels[i] != NULL) { |
3213 | free(g_labels[i]); |
3214 | g_labels[i] = NULL; |
3215 | } |
3216 | } |
3217 | } |
3218 | |
3219 | static void resolve_branches_parse_calls(int opcnt) |
3220 | { |
3221 | const struct parsed_proto *pp_c; |
3222 | struct parsed_proto *pp; |
3223 | struct parsed_data *pd; |
3224 | struct parsed_op *po; |
3225 | const char *tmpname; |
3226 | int i, l, ret; |
3227 | |
3228 | for (i = 0; i < opcnt; i++) |
3229 | { |
3230 | po = &ops[i]; |
3231 | po->bt_i = -1; |
3232 | po->btj = NULL; |
3233 | |
3234 | if (po->op == OP_CALL) { |
3235 | pp = NULL; |
3236 | |
3237 | if (po->operand[0].type == OPT_LABEL) { |
3238 | tmpname = opr_name(po, 0); |
3239 | if (IS_START(tmpname, "loc_")) |
3240 | ferr(po, "call to loc_*\n"); |
3241 | pp_c = proto_parse(g_fhdr, tmpname, g_header_mode); |
3242 | if (!g_header_mode && pp_c == NULL) |
3243 | ferr(po, "proto_parse failed for call '%s'\n", tmpname); |
3244 | |
3245 | if (pp_c != NULL) { |
3246 | pp = proto_clone(pp_c); |
3247 | my_assert_not(pp, NULL); |
3248 | } |
3249 | } |
3250 | else if (po->datap != NULL) { |
3251 | pp = calloc(1, sizeof(*pp)); |
3252 | my_assert_not(pp, NULL); |
3253 | |
3254 | ret = parse_protostr(po->datap, pp); |
3255 | if (ret < 0) |
3256 | ferr(po, "bad protostr supplied: %s\n", (char *)po->datap); |
3257 | free(po->datap); |
3258 | po->datap = NULL; |
3259 | } |
3260 | |
3261 | if (pp != NULL) { |
3262 | if (pp->is_fptr) |
3263 | check_func_pp(po, pp, "fptr var call"); |
3264 | if (pp->is_noreturn) |
3265 | po->flags |= OPF_TAIL; |
3266 | } |
3267 | po->pp = pp; |
3268 | continue; |
3269 | } |
3270 | |
3271 | if (!(po->flags & OPF_JMP) || po->op == OP_RET) |
3272 | continue; |
3273 | |
3274 | if (po->operand[0].type == OPT_REGMEM) { |
3275 | pd = try_resolve_jumptab(i, opcnt); |
3276 | if (pd == NULL) |
3277 | goto tailcall; |
3278 | |
3279 | po->btj = pd; |
3280 | continue; |
3281 | } |
3282 | |
3283 | for (l = 0; l < opcnt; l++) { |
3284 | if (g_labels[l] != NULL |
3285 | && IS(po->operand[0].name, g_labels[l])) |
3286 | { |
3287 | if (l == i + 1 && po->op == OP_JMP) { |
3288 | // yet another alignment type.. |
3289 | po->flags |= OPF_RMD|OPF_DONE; |
3290 | break; |
3291 | } |
3292 | add_label_ref(&g_label_refs[l], i); |
3293 | po->bt_i = l; |
3294 | break; |
3295 | } |
3296 | } |
3297 | |
3298 | if (po->bt_i != -1 || (po->flags & OPF_RMD)) |
3299 | continue; |
3300 | |
3301 | if (po->operand[0].type == OPT_LABEL) |
3302 | // assume tail call |
3303 | goto tailcall; |
3304 | |
3305 | ferr(po, "unhandled branch\n"); |
3306 | |
3307 | tailcall: |
3308 | po->op = OP_CALL; |
3309 | po->flags |= OPF_TAIL; |
3310 | if (i > 0 && ops[i - 1].op == OP_POP) |
3311 | po->flags |= OPF_ATAIL; |
3312 | i--; // reprocess |
3313 | } |
9af2d373 |
3314 | } |
3315 | |
3316 | static void scan_prologue_epilogue(int opcnt) |
3317 | { |
3318 | int ecx_push = 0, esp_sub = 0; |
3319 | int found; |
3320 | int i, j, l; |
3321 | |
3322 | if (ops[0].op == OP_PUSH && IS(opr_name(&ops[0], 0), "ebp") |
3323 | && ops[1].op == OP_MOV |
3324 | && IS(opr_name(&ops[1], 0), "ebp") |
3325 | && IS(opr_name(&ops[1], 1), "esp")) |
3326 | { |
3327 | g_bp_frame = 1; |
5e49b270 |
3328 | ops[0].flags |= OPF_RMD | OPF_DONE; |
3329 | ops[1].flags |= OPF_RMD | OPF_DONE; |
9af2d373 |
3330 | i = 2; |
3331 | |
3332 | if (ops[2].op == OP_SUB && IS(opr_name(&ops[2], 0), "esp")) { |
3333 | g_stack_fsz = opr_const(&ops[2], 1); |
5e49b270 |
3334 | ops[2].flags |= OPF_RMD | OPF_DONE; |
9af2d373 |
3335 | i++; |
3336 | } |
3337 | else { |
3338 | // another way msvc builds stack frame.. |
3339 | i = 2; |
3340 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
3341 | g_stack_fsz += 4; |
5e49b270 |
3342 | ops[i].flags |= OPF_RMD | OPF_DONE; |
9af2d373 |
3343 | ecx_push++; |
3344 | i++; |
3345 | } |
3346 | // and another way.. |
3347 | if (i == 2 && ops[i].op == OP_MOV && ops[i].operand[0].reg == xAX |
3348 | && ops[i].operand[1].type == OPT_CONST |
3349 | && ops[i + 1].op == OP_CALL |
3350 | && IS(opr_name(&ops[i + 1], 0), "__alloca_probe")) |
3351 | { |
3352 | g_stack_fsz += ops[i].operand[1].val; |
5e49b270 |
3353 | ops[i].flags |= OPF_RMD | OPF_DONE; |
9af2d373 |
3354 | i++; |
5e49b270 |
3355 | ops[i].flags |= OPF_RMD | OPF_DONE; |
9af2d373 |
3356 | i++; |
3357 | } |
3358 | } |
3359 | |
3360 | found = 0; |
3361 | do { |
3362 | for (; i < opcnt; i++) |
66bdb2b0 |
3363 | if (ops[i].flags & OPF_TAIL) |
9af2d373 |
3364 | break; |
3365 | j = i - 1; |
3366 | if (i == opcnt && (ops[j].flags & OPF_JMP)) { |
66bdb2b0 |
3367 | if (ops[j].bt_i != -1 || ops[j].btj != NULL) |
3368 | break; |
3369 | i--; |
9af2d373 |
3370 | j--; |
3371 | } |
3372 | |
3373 | if ((ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ebp")) |
3374 | || ops[j].op == OP_LEAVE) |
3375 | { |
5e49b270 |
3376 | ops[j].flags |= OPF_RMD | OPF_DONE; |
9af2d373 |
3377 | } |
66bdb2b0 |
3378 | else if (ops[i].op == OP_CALL && ops[i].pp != NULL |
3379 | && ops[i].pp->is_noreturn) |
3380 | { |
3381 | // on noreturn, msvc sometimes cleans stack, sometimes not |
3382 | i++; |
3383 | found = 1; |
3384 | continue; |
3385 | } |
9af2d373 |
3386 | else if (!(g_ida_func_attr & IDAFA_NORETURN)) |
3387 | ferr(&ops[j], "'pop ebp' expected\n"); |
3388 | |
3389 | if (g_stack_fsz != 0) { |
bfacdc83 |
3390 | if (ops[j].op == OP_LEAVE) |
3391 | j--; |
3392 | else if (ops[j].op == OP_POP |
3393 | && ops[j - 1].op == OP_MOV |
9af2d373 |
3394 | && IS(opr_name(&ops[j - 1], 0), "esp") |
3395 | && IS(opr_name(&ops[j - 1], 1), "ebp")) |
3396 | { |
5e49b270 |
3397 | ops[j - 1].flags |= OPF_RMD | OPF_DONE; |
bfacdc83 |
3398 | j -= 2; |
9af2d373 |
3399 | } |
bfacdc83 |
3400 | else if (!(g_ida_func_attr & IDAFA_NORETURN)) |
9af2d373 |
3401 | { |
bfacdc83 |
3402 | ferr(&ops[j], "esp restore expected\n"); |
9af2d373 |
3403 | } |
3404 | |
bfacdc83 |
3405 | if (ecx_push && j >= 0 && ops[j].op == OP_POP |
3406 | && IS(opr_name(&ops[j], 0), "ecx")) |
9af2d373 |
3407 | { |
bfacdc83 |
3408 | ferr(&ops[j], "unexpected ecx pop\n"); |
9af2d373 |
3409 | } |
3410 | } |
3411 | |
3412 | found = 1; |
3413 | i++; |
3414 | } while (i < opcnt); |
3415 | |
66bdb2b0 |
3416 | if (!found) |
3417 | ferr(ops, "missing ebp epilogue\n"); |
9af2d373 |
3418 | return; |
3419 | } |
3420 | |
3421 | // non-bp frame |
3422 | i = 0; |
3423 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
5e49b270 |
3424 | ops[i].flags |= OPF_RMD | OPF_DONE; |
9af2d373 |
3425 | g_stack_fsz += 4; |
3426 | ecx_push++; |
3427 | i++; |
3428 | } |
3429 | |
3430 | for (; i < opcnt; i++) { |
3431 | if (ops[i].op == OP_PUSH || (ops[i].flags & (OPF_JMP|OPF_TAIL))) |
3432 | break; |
3433 | if (ops[i].op == OP_SUB && ops[i].operand[0].reg == xSP |
3434 | && ops[i].operand[1].type == OPT_CONST) |
3435 | { |
3436 | g_stack_fsz = ops[i].operand[1].val; |
5e49b270 |
3437 | ops[i].flags |= OPF_RMD | OPF_DONE; |
9af2d373 |
3438 | esp_sub = 1; |
3439 | break; |
3440 | } |
3441 | } |
3442 | |
3443 | if (ecx_push && !esp_sub) { |
3444 | // could actually be args for a call.. |
3445 | for (; i < opcnt; i++) |
3446 | if (ops[i].op != OP_PUSH) |
3447 | break; |
3448 | |
3449 | if (ops[i].op == OP_CALL && ops[i].operand[0].type == OPT_LABEL) { |
3450 | const struct parsed_proto *pp; |
3451 | pp = proto_parse(g_fhdr, opr_name(&ops[i], 0), 1); |
3452 | j = pp ? pp->argc_stack : 0; |
3453 | while (i > 0 && j > 0) { |
3454 | i--; |
3455 | if (ops[i].op == OP_PUSH) { |
5e49b270 |
3456 | ops[i].flags &= ~(OPF_RMD | OPF_DONE); |
9af2d373 |
3457 | j--; |
3458 | } |
3459 | } |
3460 | if (j != 0) |
3461 | ferr(&ops[i], "unhandled prologue\n"); |
3462 | |
3463 | // recheck |
3464 | i = g_stack_fsz = ecx_push = 0; |
3465 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
3466 | if (!(ops[i].flags & OPF_RMD)) |
3467 | break; |
3468 | g_stack_fsz += 4; |
3469 | ecx_push++; |
3470 | i++; |
3471 | } |
3472 | } |
3473 | } |
3474 | |
3475 | found = 0; |
3476 | if (ecx_push || esp_sub) |
3477 | { |
3478 | g_sp_frame = 1; |
3479 | |
3480 | i++; |
3481 | do { |
3482 | for (; i < opcnt; i++) |
66bdb2b0 |
3483 | if (ops[i].flags & OPF_TAIL) |
9af2d373 |
3484 | break; |
3485 | j = i - 1; |
3486 | if (i == opcnt && (ops[j].flags & OPF_JMP)) { |
66bdb2b0 |
3487 | if (ops[j].bt_i != -1 || ops[j].btj != NULL) |
3488 | break; |
3489 | i--; |
9af2d373 |
3490 | j--; |
3491 | } |
3492 | |
3493 | if (ecx_push > 0) { |
3494 | for (l = 0; l < ecx_push; l++) { |
3495 | if (ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ecx")) |
3496 | /* pop ecx */; |
3497 | else if (ops[j].op == OP_ADD |
3498 | && IS(opr_name(&ops[j], 0), "esp") |
3499 | && ops[j].operand[1].type == OPT_CONST) |
3500 | { |
3501 | /* add esp, N */ |
5e49b270 |
3502 | l += ops[j].operand[1].val / 4 - 1; |
9af2d373 |
3503 | } |
3504 | else |
3505 | ferr(&ops[j], "'pop ecx' expected\n"); |
3506 | |
5e49b270 |
3507 | ops[j].flags |= OPF_RMD | OPF_DONE; |
9af2d373 |
3508 | j--; |
3509 | } |
3510 | if (l != ecx_push) |
3511 | ferr(&ops[j], "epilogue scan failed\n"); |
3512 | |
3513 | found = 1; |
3514 | } |
3515 | |
3516 | if (esp_sub) { |
3517 | if (ops[j].op != OP_ADD |
3518 | || !IS(opr_name(&ops[j], 0), "esp") |
3519 | || ops[j].operand[1].type != OPT_CONST |
3520 | || ops[j].operand[1].val != g_stack_fsz) |
3521 | ferr(&ops[j], "'add esp' expected\n"); |
3522 | |
5e49b270 |
3523 | ops[j].flags |= OPF_RMD | OPF_DONE; |
9af2d373 |
3524 | ops[j].operand[1].val = 0; // hack for stack arg scanner |
3525 | found = 1; |
3526 | } |
3527 | |
3528 | i++; |
3529 | } while (i < opcnt); |
66bdb2b0 |
3530 | |
3531 | if (!found) |
3532 | ferr(ops, "missing esp epilogue\n"); |
9af2d373 |
3533 | } |
3534 | } |
3535 | |
89ff3147 |
3536 | static const struct parsed_proto *resolve_icall(int i, int opcnt, |
db63af51 |
3537 | int *pp_i, int *multi_src) |
1cd4a663 |
3538 | { |
3539 | const struct parsed_proto *pp = NULL; |
da87ae38 |
3540 | int search_advice = 0; |
1cd4a663 |
3541 | |
89ff3147 |
3542 | *multi_src = 0; |
db63af51 |
3543 | *pp_i = -1; |
89ff3147 |
3544 | |
1cd4a663 |
3545 | switch (ops[i].operand[0].type) { |
3546 | case OPT_REGMEM: |
3547 | case OPT_LABEL: |
3548 | case OPT_OFFSET: |
da87ae38 |
3549 | pp = try_recover_pp(&ops[i], &ops[i].operand[0], &search_advice); |
3550 | if (!search_advice) |
3551 | break; |
3552 | // fallthrough |
1cd4a663 |
3553 | default: |
89ff3147 |
3554 | scan_for_call_type(i, &ops[i].operand[0], i + opcnt * 9, &pp, |
db63af51 |
3555 | pp_i, multi_src); |
1cd4a663 |
3556 | break; |
3557 | } |
3558 | |
3559 | return pp; |
3560 | } |
3561 | |
23fd0b11 |
3562 | // find an instruction that changed opr before i op |
db63af51 |
3563 | // *op_i must be set to -1 by the caller |
92d715b6 |
3564 | // *entry is set to 1 if one source is determined to be the caller |
3565 | // returns 1 if found, *op_i is then set to origin |
23fd0b11 |
3566 | static int resolve_origin(int i, const struct parsed_opr *opr, |
92d715b6 |
3567 | int magic, int *op_i, int *is_caller) |
1f84f6b3 |
3568 | { |
3569 | struct label_ref *lr; |
3570 | int ret = 0; |
3571 | |
92d715b6 |
3572 | if (ops[i].cc_scratch == magic) |
3573 | return 0; |
1f84f6b3 |
3574 | ops[i].cc_scratch = magic; |
3575 | |
3576 | while (1) { |
d7857c3a |
3577 | if (g_labels[i] != NULL) { |
1f84f6b3 |
3578 | lr = &g_label_refs[i]; |
92d715b6 |
3579 | for (; lr != NULL; lr = lr->next) { |
3580 | check_i(&ops[i], lr->i); |
3581 | ret |= resolve_origin(lr->i, opr, magic, op_i, is_caller); |
3582 | } |
1f84f6b3 |
3583 | if (i > 0 && LAST_OP(i - 1)) |
3584 | return ret; |
3585 | } |
3586 | |
3587 | i--; |
92d715b6 |
3588 | if (i < 0) { |
3589 | if (is_caller != NULL) |
3590 | *is_caller = 1; |
1f84f6b3 |
3591 | return -1; |
92d715b6 |
3592 | } |
1f84f6b3 |
3593 | |
3594 | if (ops[i].cc_scratch == magic) |
ebc4dc43 |
3595 | return ret; |
1f84f6b3 |
3596 | ops[i].cc_scratch = magic; |
3597 | |
3598 | if (!(ops[i].flags & OPF_DATA)) |
3599 | continue; |
3600 | if (!is_opr_modified(opr, &ops[i])) |
3601 | continue; |
23fd0b11 |
3602 | |
3603 | if (*op_i >= 0) { |
3604 | if (*op_i == i) |
ebc4dc43 |
3605 | return ret | 1; |
3606 | |
23fd0b11 |
3607 | // XXX: could check if the other op does the same |
3608 | return -1; |
3609 | } |
3610 | |
3611 | *op_i = i; |
ebc4dc43 |
3612 | return ret | 1; |
23fd0b11 |
3613 | } |
3614 | } |
3615 | |
db63af51 |
3616 | // find an instruction that previously referenced opr |
3617 | // if multiple results are found - fail |
3618 | // *op_i must be set to -1 by the caller |
3619 | // returns 1 if found, *op_i is then set to referencer insn |
3620 | static int resolve_last_ref(int i, const struct parsed_opr *opr, |
3621 | int magic, int *op_i) |
3622 | { |
3623 | struct label_ref *lr; |
3624 | int ret = 0; |
3625 | |
3626 | if (ops[i].cc_scratch == magic) |
3627 | return 0; |
3628 | ops[i].cc_scratch = magic; |
3629 | |
3630 | while (1) { |
3631 | if (g_labels[i] != NULL) { |
3632 | lr = &g_label_refs[i]; |
3633 | for (; lr != NULL; lr = lr->next) { |
3634 | check_i(&ops[i], lr->i); |
3635 | ret |= resolve_last_ref(lr->i, opr, magic, op_i); |
3636 | } |
3637 | if (i > 0 && LAST_OP(i - 1)) |
3638 | return ret; |
3639 | } |
3640 | |
3641 | i--; |
3642 | if (i < 0) |
3643 | return -1; |
3644 | |
3645 | if (ops[i].cc_scratch == magic) |
3646 | return 0; |
3647 | ops[i].cc_scratch = magic; |
3648 | |
3649 | if (!is_opr_referenced(opr, &ops[i])) |
3650 | continue; |
3651 | |
3652 | if (*op_i >= 0) |
3653 | return -1; |
3654 | |
3655 | *op_i = i; |
3656 | return 1; |
3657 | } |
3658 | } |
3659 | |
3660 | // find next instruction that reads opr |
3661 | // if multiple results are found - fail |
3662 | // *op_i must be set to -1 by the caller |
3663 | // returns 1 if found, *op_i is then set to referencer insn |
3664 | static int find_next_read(int i, int opcnt, |
3665 | const struct parsed_opr *opr, int magic, int *op_i) |
3666 | { |
3667 | struct parsed_op *po; |
3668 | int j, ret = 0; |
3669 | |
3670 | for (; i < opcnt; i++) |
3671 | { |
3672 | if (ops[i].cc_scratch == magic) |
3673 | return 0; |
3674 | ops[i].cc_scratch = magic; |
3675 | |
3676 | po = &ops[i]; |
3677 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
3678 | if (po->btj != NULL) { |
3679 | // jumptable |
3680 | for (j = 0; j < po->btj->count; j++) { |
3681 | check_i(po, po->btj->d[j].bt_i); |
3682 | ret |= find_next_read(po->btj->d[j].bt_i, opcnt, opr, |
3683 | magic, op_i); |
3684 | } |
3685 | return ret; |
3686 | } |
3687 | |
3688 | if (po->flags & OPF_RMD) |
3689 | continue; |
3690 | check_i(po, po->bt_i); |
3691 | if (po->flags & OPF_CJMP) { |
3692 | ret = find_next_read(po->bt_i, opcnt, opr, magic, op_i); |
3693 | if (ret < 0) |
3694 | return ret; |
3695 | } |
3696 | |
3697 | i = po->bt_i - 1; |
3698 | continue; |
3699 | } |
3700 | |
3701 | if (!is_opr_read(opr, po)) { |
3702 | if (is_opr_modified(opr, po)) |
3703 | // it's overwritten |
3704 | return 0; |
3705 | if (po->flags & OPF_TAIL) |
3706 | return 0; |
3707 | continue; |
3708 | } |
3709 | |
3710 | if (*op_i >= 0) |
3711 | return -1; |
3712 | |
3713 | *op_i = i; |
3714 | return 1; |
3715 | } |
3716 | |
3717 | return 0; |
3718 | } |
3719 | |
23fd0b11 |
3720 | static int try_resolve_const(int i, const struct parsed_opr *opr, |
3721 | int magic, unsigned int *val) |
3722 | { |
3723 | int s_i = -1; |
92d715b6 |
3724 | int ret; |
23fd0b11 |
3725 | |
92d715b6 |
3726 | ret = resolve_origin(i, opr, magic, &s_i, NULL); |
23fd0b11 |
3727 | if (ret == 1) { |
3728 | i = s_i; |
1f84f6b3 |
3729 | if (ops[i].op != OP_MOV && ops[i].operand[1].type != OPT_CONST) |
3730 | return -1; |
3731 | |
3732 | *val = ops[i].operand[1].val; |
3733 | return 1; |
3734 | } |
23fd0b11 |
3735 | |
3736 | return -1; |
1f84f6b3 |
3737 | } |
3738 | |
26677139 |
3739 | static struct parsed_proto *process_call_early(int i, int opcnt, |
3740 | int *adj_i) |
3741 | { |
3742 | struct parsed_op *po = &ops[i]; |
3743 | struct parsed_proto *pp; |
3744 | int multipath = 0; |
3745 | int adj = 0; |
bfacdc83 |
3746 | int j, ret; |
26677139 |
3747 | |
3748 | pp = po->pp; |
3749 | if (pp == NULL || pp->is_vararg || pp->argc_reg != 0) |
3750 | // leave for later |
3751 | return NULL; |
3752 | |
3753 | // look for and make use of esp adjust |
3754 | *adj_i = ret = -1; |
3755 | if (!pp->is_stdcall && pp->argc_stack > 0) |
3756 | ret = scan_for_esp_adjust(i + 1, opcnt, |
ee2361b9 |
3757 | pp->argc_stack * 4, &adj, &multipath, 0); |
26677139 |
3758 | if (ret >= 0) { |
3759 | if (pp->argc_stack > adj / 4) |
3760 | return NULL; |
3761 | if (multipath) |
3762 | return NULL; |
bfacdc83 |
3763 | if (ops[ret].op == OP_POP) { |
3764 | for (j = 1; j < adj / 4; j++) { |
3765 | if (ops[ret + j].op != OP_POP |
3766 | || ops[ret + j].operand[0].reg != xCX) |
3767 | { |
3768 | return NULL; |
3769 | } |
3770 | } |
3771 | } |
26677139 |
3772 | } |
3773 | |
3774 | *adj_i = ret; |
3775 | return pp; |
3776 | } |
3777 | |
9af2d373 |
3778 | static struct parsed_proto *process_call(int i, int opcnt) |
3779 | { |
3780 | struct parsed_op *po = &ops[i]; |
3781 | const struct parsed_proto *pp_c; |
3782 | struct parsed_proto *pp; |
3783 | const char *tmpname; |
db63af51 |
3784 | int call_i = -1, ref_i = -1; |
26677139 |
3785 | int adj = 0, multipath = 0; |
9af2d373 |
3786 | int ret, arg; |
3787 | |
3788 | tmpname = opr_name(po, 0); |
3789 | pp = po->pp; |
3790 | if (pp == NULL) |
3791 | { |
3792 | // indirect call |
db63af51 |
3793 | pp_c = resolve_icall(i, opcnt, &call_i, &multipath); |
9af2d373 |
3794 | if (pp_c != NULL) { |
3795 | if (!pp_c->is_func && !pp_c->is_fptr) |
3796 | ferr(po, "call to non-func: %s\n", pp_c->name); |
3797 | pp = proto_clone(pp_c); |
3798 | my_assert_not(pp, NULL); |
26677139 |
3799 | if (multipath) |
9af2d373 |
3800 | // not resolved just to single func |
3801 | pp->is_fptr = 1; |
3802 | |
3803 | switch (po->operand[0].type) { |
3804 | case OPT_REG: |
3805 | // we resolved this call and no longer need the register |
3806 | po->regmask_src &= ~(1 << po->operand[0].reg); |
db63af51 |
3807 | |
3808 | if (!multipath && i != call_i && ops[call_i].op == OP_MOV |
3809 | && ops[call_i].operand[1].type == OPT_LABEL) |
3810 | { |
3811 | // no other source users? |
e83ea7ed |
3812 | ret = resolve_last_ref(i, &po->operand[0], i + opcnt * 10, |
db63af51 |
3813 | &ref_i); |
3814 | if (ret == 1 && call_i == ref_i) { |
3815 | // and nothing uses it after us? |
3816 | ref_i = -1; |
3817 | ret = find_next_read(i + 1, opcnt, &po->operand[0], |
e83ea7ed |
3818 | i + opcnt * 11, &ref_i); |
db63af51 |
3819 | if (ret != 1) |
3820 | // then also don't need the source mov |
3821 | ops[call_i].flags |= OPF_RMD; |
3822 | } |
3823 | } |
9af2d373 |
3824 | break; |
3825 | case OPT_REGMEM: |
3826 | pp->is_fptr = 1; |
3827 | break; |
3828 | default: |
3829 | break; |
3830 | } |
3831 | } |
3832 | if (pp == NULL) { |
3833 | pp = calloc(1, sizeof(*pp)); |
3834 | my_assert_not(pp, NULL); |
3835 | |
3836 | pp->is_fptr = 1; |
ee2361b9 |
3837 | ret = scan_for_esp_adjust(i + 1, opcnt, |
bfacdc83 |
3838 | -1, &adj, &multipath, 0); |
26677139 |
3839 | if (ret < 0 || adj < 0) { |
9af2d373 |
3840 | if (!g_allow_regfunc) |
3841 | ferr(po, "non-__cdecl indirect call unhandled yet\n"); |
3842 | pp->is_unresolved = 1; |
26677139 |
3843 | adj = 0; |
9af2d373 |
3844 | } |
26677139 |
3845 | adj /= 4; |
3846 | if (adj > ARRAY_SIZE(pp->arg)) |
3847 | ferr(po, "esp adjust too large: %d\n", adj); |
9af2d373 |
3848 | pp->ret_type.name = strdup("int"); |
26677139 |
3849 | pp->argc = pp->argc_stack = adj; |
9af2d373 |
3850 | for (arg = 0; arg < pp->argc; arg++) |
3851 | pp->arg[arg].type.name = strdup("int"); |
3852 | } |
3853 | po->pp = pp; |
3854 | } |
3855 | |
3856 | // look for and make use of esp adjust |
91ca764a |
3857 | multipath = 0; |
9af2d373 |
3858 | ret = -1; |
bfacdc83 |
3859 | if (!pp->is_stdcall && pp->argc_stack > 0) { |
3860 | int adj_expect = pp->is_vararg ? -1 : pp->argc_stack * 4; |
9af2d373 |
3861 | ret = scan_for_esp_adjust(i + 1, opcnt, |
bfacdc83 |
3862 | adj_expect, &adj, &multipath, 0); |
3863 | } |
9af2d373 |
3864 | if (ret >= 0) { |
3865 | if (pp->is_vararg) { |
26677139 |
3866 | if (adj / 4 < pp->argc_stack) { |
3867 | fnote(po, "(this call)\n"); |
3868 | ferr(&ops[ret], "esp adjust is too small: %x < %x\n", |
3869 | adj, pp->argc_stack * 4); |
3870 | } |
9af2d373 |
3871 | // modify pp to make it have varargs as normal args |
3872 | arg = pp->argc; |
26677139 |
3873 | pp->argc += adj / 4 - pp->argc_stack; |
9af2d373 |
3874 | for (; arg < pp->argc; arg++) { |
3875 | pp->arg[arg].type.name = strdup("int"); |
3876 | pp->argc_stack++; |
3877 | } |
3878 | if (pp->argc > ARRAY_SIZE(pp->arg)) |
3879 | ferr(po, "too many args for '%s'\n", tmpname); |
3880 | } |
26677139 |
3881 | if (pp->argc_stack > adj / 4) { |
9af2d373 |
3882 | fnote(po, "(this call)\n"); |
3883 | ferr(&ops[ret], "stack tracking failed for '%s': %x %x\n", |
26677139 |
3884 | tmpname, pp->argc_stack * 4, adj); |
9af2d373 |
3885 | } |
3886 | |
ee2361b9 |
3887 | scan_for_esp_adjust(i + 1, opcnt, |
3888 | pp->argc_stack * 4, &adj, &multipath, 1); |
9af2d373 |
3889 | } |
3890 | else if (pp->is_vararg) |
3891 | ferr(po, "missing esp_adjust for vararg func '%s'\n", |
3892 | pp->name); |
3893 | |
3894 | return pp; |
3895 | } |
3896 | |
26677139 |
3897 | static int collect_call_args_early(struct parsed_op *po, int i, |
3898 | struct parsed_proto *pp, int *regmask) |
3899 | { |
3900 | int arg, ret; |
3901 | int j; |
3902 | |
3903 | for (arg = 0; arg < pp->argc; arg++) |
3904 | if (pp->arg[arg].reg == NULL) |
3905 | break; |
3906 | |
3907 | // first see if it can be easily done |
3908 | for (j = i; j > 0 && arg < pp->argc; ) |
3909 | { |
3910 | if (g_labels[j] != NULL) |
3911 | return -1; |
3912 | j--; |
3913 | |
3914 | if (ops[j].op == OP_CALL) |
3915 | return -1; |
3916 | else if (ops[j].op == OP_ADD && ops[j].operand[0].reg == xSP) |
3917 | return -1; |
3918 | else if (ops[j].op == OP_POP) |
3919 | return -1; |
3920 | else if (ops[j].flags & OPF_CJMP) |
3921 | return -1; |
3922 | else if (ops[j].op == OP_PUSH) { |
3923 | if (ops[j].flags & (OPF_FARG|OPF_FARGNR)) |
3924 | return -1; |
3925 | ret = scan_for_mod(&ops[j], j + 1, i, 1); |
3926 | if (ret >= 0) |
3927 | return -1; |
3928 | |
3929 | if (pp->arg[arg].type.is_va_list) |
3930 | return -1; |
3931 | |
3932 | // next arg |
3933 | for (arg++; arg < pp->argc; arg++) |
3934 | if (pp->arg[arg].reg == NULL) |
3935 | break; |
3936 | } |
3937 | } |
3938 | |
3939 | if (arg < pp->argc) |
3940 | return -1; |
3941 | |
3942 | // now do it |
3943 | for (arg = 0; arg < pp->argc; arg++) |
3944 | if (pp->arg[arg].reg == NULL) |
3945 | break; |
3946 | |
3947 | for (j = i; j > 0 && arg < pp->argc; ) |
3948 | { |
3949 | j--; |
3950 | |
3951 | if (ops[j].op == OP_PUSH) |
3952 | { |
3953 | ops[j].p_argnext = -1; |
3954 | ferr_assert(&ops[j], pp->arg[arg].datap == NULL); |
3955 | pp->arg[arg].datap = &ops[j]; |
3956 | |
3957 | if (ops[j].operand[0].type == OPT_REG) |
3958 | *regmask |= 1 << ops[j].operand[0].reg; |
3959 | |
5e49b270 |
3960 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_FARGNR | OPF_FARG; |
26677139 |
3961 | ops[j].flags &= ~OPF_RSAVE; |
3962 | |
3963 | // next arg |
3964 | for (arg++; arg < pp->argc; arg++) |
3965 | if (pp->arg[arg].reg == NULL) |
3966 | break; |
3967 | } |
3968 | } |
3969 | |
3970 | return 0; |
3971 | } |
3972 | |
89ff3147 |
3973 | static int collect_call_args_r(struct parsed_op *po, int i, |
3a5101d7 |
3974 | struct parsed_proto *pp, int *regmask, int *save_arg_vars, |
3975 | int *arg_grp, int arg, int magic, int need_op_saving, int may_reuse) |
e56ab892 |
3976 | { |
3977 | struct parsed_proto *pp_tmp; |
3a5101d7 |
3978 | struct parsed_op *po_tmp; |
e56ab892 |
3979 | struct label_ref *lr; |
2b43685d |
3980 | int need_to_save_current; |
3a5101d7 |
3981 | int arg_grp_current = 0; |
3982 | int save_args_seen = 0; |
23fd0b11 |
3983 | int save_args; |
e56ab892 |
3984 | int ret = 0; |
5f70a34f |
3985 | int reg; |
23fd0b11 |
3986 | char buf[32]; |
3987 | int j, k; |
e56ab892 |
3988 | |
a3684be1 |
3989 | if (i < 0) { |
a2c1d768 |
3990 | ferr(po, "dead label encountered\n"); |
a3684be1 |
3991 | return -1; |
3992 | } |
e56ab892 |
3993 | |
de50b98b |
3994 | for (; arg < pp->argc; arg++) |
e56ab892 |
3995 | if (pp->arg[arg].reg == NULL) |
3996 | break; |
a3684be1 |
3997 | magic = (magic & 0xffffff) | (arg << 24); |
e56ab892 |
3998 | |
89ff3147 |
3999 | for (j = i; j >= 0 && (arg < pp->argc || pp->is_unresolved); ) |
e56ab892 |
4000 | { |
a3684be1 |
4001 | if (((ops[j].cc_scratch ^ magic) & 0xffffff) == 0) { |
4002 | if (ops[j].cc_scratch != magic) { |
4003 | ferr(&ops[j], "arg collect hit same path with diff args for %s\n", |
4004 | pp->name); |
4005 | return -1; |
4006 | } |
4007 | // ok: have already been here |
4008 | return 0; |
4009 | } |
4010 | ops[j].cc_scratch = magic; |
4011 | |
d7857c3a |
4012 | if (g_labels[j] != NULL && g_label_refs[j].i != -1) { |
e56ab892 |
4013 | lr = &g_label_refs[j]; |
4014 | if (lr->next != NULL) |
4015 | need_op_saving = 1; |
a652aa9f |
4016 | for (; lr->next; lr = lr->next) { |
92d715b6 |
4017 | check_i(&ops[j], lr->i); |
5c024ef7 |
4018 | if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP) |
a652aa9f |
4019 | may_reuse = 1; |
89ff3147 |
4020 | ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars, |
3a5101d7 |
4021 | arg_grp, arg, magic, need_op_saving, may_reuse); |
a3684be1 |
4022 | if (ret < 0) |
4023 | return ret; |
a652aa9f |
4024 | } |
e56ab892 |
4025 | |
92d715b6 |
4026 | check_i(&ops[j], lr->i); |
5c024ef7 |
4027 | if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP) |
a652aa9f |
4028 | may_reuse = 1; |
de50b98b |
4029 | if (j > 0 && LAST_OP(j - 1)) { |
e56ab892 |
4030 | // follow last branch in reverse |
4031 | j = lr->i; |
4032 | continue; |
4033 | } |
4034 | need_op_saving = 1; |
89ff3147 |
4035 | ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars, |
3a5101d7 |
4036 | arg_grp, arg, magic, need_op_saving, may_reuse); |
a3684be1 |
4037 | if (ret < 0) |
4038 | return ret; |
e56ab892 |
4039 | } |
4040 | j--; |
4041 | |
4042 | if (ops[j].op == OP_CALL) |
4043 | { |
89ff3147 |
4044 | if (pp->is_unresolved) |
4045 | break; |
4046 | |
092f64e1 |
4047 | pp_tmp = ops[j].pp; |
e56ab892 |
4048 | if (pp_tmp == NULL) |
7ae48d73 |
4049 | ferr(po, "arg collect hit unparsed call '%s'\n", |
4050 | ops[j].operand[0].name); |
a652aa9f |
4051 | if (may_reuse && pp_tmp->argc_stack > 0) |
de50b98b |
4052 | ferr(po, "arg collect %d/%d hit '%s' with %d stack args\n", |
4053 | arg, pp->argc, opr_name(&ops[j], 0), pp_tmp->argc_stack); |
e56ab892 |
4054 | } |
fdd5548a |
4055 | // esp adjust of 0 means we collected it before |
4056 | else if (ops[j].op == OP_ADD && ops[j].operand[0].reg == xSP |
4057 | && (ops[j].operand[1].type != OPT_CONST |
4058 | || ops[j].operand[1].val != 0)) |
4059 | { |
89ff3147 |
4060 | if (pp->is_unresolved) |
4061 | break; |
4062 | |
2b70f6d3 |
4063 | fnote(po, "(this call)\n"); |
4064 | ferr(&ops[j], "arg collect %d/%d hit esp adjust of %d\n", |
fdd5548a |
4065 | arg, pp->argc, ops[j].operand[1].val); |
de50b98b |
4066 | } |
5e49b270 |
4067 | else if (ops[j].op == OP_POP && !(ops[j].flags & OPF_DONE)) |
9af2d373 |
4068 | { |
89ff3147 |
4069 | if (pp->is_unresolved) |
4070 | break; |
4071 | |
2b70f6d3 |
4072 | fnote(po, "(this call)\n"); |
4073 | ferr(&ops[j], "arg collect %d/%d hit pop\n", arg, pp->argc); |
de50b98b |
4074 | } |
5c024ef7 |
4075 | else if (ops[j].flags & OPF_CJMP) |
de50b98b |
4076 | { |
89ff3147 |
4077 | if (pp->is_unresolved) |
4078 | break; |
4079 | |
a652aa9f |
4080 | may_reuse = 1; |
de50b98b |
4081 | } |
91ca764a |
4082 | else if (ops[j].op == OP_PUSH |
4083 | && !(ops[j].flags & (OPF_FARGNR|OPF_DONE))) |
e56ab892 |
4084 | { |
89ff3147 |
4085 | if (pp->is_unresolved && (ops[j].flags & OPF_RMD)) |
4086 | break; |
4087 | |
3a5101d7 |
4088 | ops[j].p_argnext = -1; |
4089 | po_tmp = pp->arg[arg].datap; |
4090 | if (po_tmp != NULL) |
4091 | ops[j].p_argnext = po_tmp - ops; |
e56ab892 |
4092 | pp->arg[arg].datap = &ops[j]; |
3a5101d7 |
4093 | |
2b43685d |
4094 | need_to_save_current = 0; |
23fd0b11 |
4095 | save_args = 0; |
5f70a34f |
4096 | reg = -1; |
4097 | if (ops[j].operand[0].type == OPT_REG) |
4098 | reg = ops[j].operand[0].reg; |
4099 | |
e56ab892 |
4100 | if (!need_op_saving) { |
89ff3147 |
4101 | ret = scan_for_mod(&ops[j], j + 1, i, 1); |
2b43685d |
4102 | need_to_save_current = (ret >= 0); |
e56ab892 |
4103 | } |
2b43685d |
4104 | if (need_op_saving || need_to_save_current) { |
e56ab892 |
4105 | // mark this push as one that needs operand saving |
4106 | ops[j].flags &= ~OPF_RMD; |
5f70a34f |
4107 | if (ops[j].p_argnum == 0) { |
4108 | ops[j].p_argnum = arg + 1; |
23fd0b11 |
4109 | save_args |= 1 << arg; |
de50b98b |
4110 | } |
fdd5548a |
4111 | else if (ops[j].p_argnum < arg + 1) { |
4112 | // XXX: might kill valid var.. |
4113 | //*save_arg_vars &= ~(1 << (ops[j].p_argnum - 1)); |
4114 | ops[j].p_argnum = arg + 1; |
4115 | save_args |= 1 << arg; |
4116 | } |
3a5101d7 |
4117 | |
4118 | if (save_args_seen & (1 << (ops[j].p_argnum - 1))) { |
4119 | save_args_seen = 0; |
4120 | arg_grp_current++; |
4121 | if (arg_grp_current >= MAX_ARG_GRP) |
4122 | ferr(&ops[j], "out of arg groups (arg%d), f %s\n", |
4123 | ops[j].p_argnum, pp->name); |
4124 | } |
e56ab892 |
4125 | } |
5f70a34f |
4126 | else if (ops[j].p_argnum == 0) |
e56ab892 |
4127 | ops[j].flags |= OPF_RMD; |
4128 | |
a652aa9f |
4129 | // some PUSHes are reused by different calls on other branches, |
de50b98b |
4130 | // but that can't happen if we didn't branch, so they |
4131 | // can be removed from future searches (handles nested calls) |
a652aa9f |
4132 | if (!may_reuse) |
9af2d373 |
4133 | ops[j].flags |= OPF_FARGNR; |
de50b98b |
4134 | |
9af2d373 |
4135 | ops[j].flags |= OPF_FARG; |
da87ae38 |
4136 | ops[j].flags &= ~OPF_RSAVE; |
4137 | |
23fd0b11 |
4138 | // check for __VALIST |
04abc5d6 |
4139 | if (!pp->is_unresolved && g_func_pp != NULL |
4140 | && pp->arg[arg].type.is_va_list) |
4141 | { |
23fd0b11 |
4142 | k = -1; |
92d715b6 |
4143 | ret = resolve_origin(j, &ops[j].operand[0], |
4144 | magic + 1, &k, NULL); |
5f70a34f |
4145 | if (ret == 1 && k >= 0) |
23fd0b11 |
4146 | { |
5f70a34f |
4147 | if (ops[k].op == OP_LEA) { |
4148 | snprintf(buf, sizeof(buf), "arg_%X", |
4149 | g_func_pp->argc_stack * 4); |
4150 | if (!g_func_pp->is_vararg |
4151 | || strstr(ops[k].operand[1].name, buf)) |
4152 | { |
5e49b270 |
4153 | ops[k].flags |= OPF_RMD | OPF_DONE; |
5f70a34f |
4154 | ops[j].flags |= OPF_RMD | OPF_VAPUSH; |
4155 | save_args &= ~(1 << arg); |
4156 | reg = -1; |
4157 | } |
4158 | else |
4159 | ferr(&ops[j], "lea va_list used, but no vararg?\n"); |
4160 | } |
4161 | // check for va_list from g_func_pp arg too |
4162 | else if (ops[k].op == OP_MOV |
4163 | && is_stack_access(&ops[k], &ops[k].operand[1])) |
4164 | { |
4165 | ret = stack_frame_access(&ops[k], &ops[k].operand[1], |
4166 | buf, sizeof(buf), ops[k].operand[1].name, "", 1, 0); |
4167 | if (ret >= 0) { |
5e49b270 |
4168 | ops[k].flags |= OPF_RMD | OPF_DONE; |
5f70a34f |
4169 | ops[j].flags |= OPF_RMD; |
4170 | ops[j].p_argpass = ret + 1; |
4171 | save_args &= ~(1 << arg); |
4172 | reg = -1; |
4173 | } |
4174 | } |
23fd0b11 |
4175 | } |
4176 | } |
4177 | |
4178 | *save_arg_vars |= save_args; |
4179 | |
4180 | // tracking reg usage |
5f70a34f |
4181 | if (reg >= 0) |
4182 | *regmask |= 1 << reg; |
23fd0b11 |
4183 | |
89ff3147 |
4184 | arg++; |
4185 | if (!pp->is_unresolved) { |
4186 | // next arg |
4187 | for (; arg < pp->argc; arg++) |
4188 | if (pp->arg[arg].reg == NULL) |
4189 | break; |
4190 | } |
a3684be1 |
4191 | magic = (magic & 0xffffff) | (arg << 24); |
e56ab892 |
4192 | } |
3a5101d7 |
4193 | |
4194 | if (ops[j].p_arggrp > arg_grp_current) { |
4195 | save_args_seen = 0; |
4196 | arg_grp_current = ops[j].p_arggrp; |
4197 | } |
4198 | if (ops[j].p_argnum > 0) |
4199 | save_args_seen |= 1 << (ops[j].p_argnum - 1); |
e56ab892 |
4200 | } |
4201 | |
4202 | if (arg < pp->argc) { |
4203 | ferr(po, "arg collect failed for '%s': %d/%d\n", |
4204 | pp->name, arg, pp->argc); |
89ff3147 |
4205 | return -1; |
e56ab892 |
4206 | } |
89ff3147 |
4207 | |
3a5101d7 |
4208 | if (arg_grp_current > *arg_grp) |
4209 | *arg_grp = arg_grp_current; |
4210 | |
89ff3147 |
4211 | return arg; |
4212 | } |
4213 | |
4214 | static int collect_call_args(struct parsed_op *po, int i, |
4215 | struct parsed_proto *pp, int *regmask, int *save_arg_vars, |
4216 | int magic) |
4217 | { |
3a5101d7 |
4218 | // arg group is for cases when pushes for |
4219 | // multiple funcs are going on |
4220 | struct parsed_op *po_tmp; |
4221 | int save_arg_vars_current = 0; |
4222 | int arg_grp = 0; |
89ff3147 |
4223 | int ret; |
4224 | int a; |
4225 | |
3a5101d7 |
4226 | ret = collect_call_args_r(po, i, pp, regmask, |
4227 | &save_arg_vars_current, &arg_grp, 0, magic, 0, 0); |
89ff3147 |
4228 | if (ret < 0) |
4229 | return ret; |
4230 | |
3a5101d7 |
4231 | if (arg_grp != 0) { |
4232 | // propagate arg_grp |
4233 | for (a = 0; a < pp->argc; a++) { |
4234 | if (pp->arg[a].reg != NULL) |
4235 | continue; |
4236 | |
4237 | po_tmp = pp->arg[a].datap; |
4238 | while (po_tmp != NULL) { |
4239 | po_tmp->p_arggrp = arg_grp; |
4240 | if (po_tmp->p_argnext > 0) |
4241 | po_tmp = &ops[po_tmp->p_argnext]; |
4242 | else |
4243 | po_tmp = NULL; |
4244 | } |
4245 | } |
4246 | } |
4247 | save_arg_vars[arg_grp] |= save_arg_vars_current; |
4248 | |
89ff3147 |
4249 | if (pp->is_unresolved) { |
4250 | pp->argc += ret; |
4251 | pp->argc_stack += ret; |
4252 | for (a = 0; a < pp->argc; a++) |
4253 | if (pp->arg[a].type.name == NULL) |
4254 | pp->arg[a].type.name = strdup("int"); |
4255 | } |
4256 | |
e56ab892 |
4257 | return ret; |
4258 | } |
4259 | |
89ff3147 |
4260 | static void pp_insert_reg_arg(struct parsed_proto *pp, const char *reg) |
4261 | { |
4262 | int i; |
4263 | |
4264 | for (i = 0; i < pp->argc; i++) |
4265 | if (pp->arg[i].reg == NULL) |
4266 | break; |
4267 | |
4268 | if (pp->argc_stack) |
4269 | memmove(&pp->arg[i + 1], &pp->arg[i], |
4270 | sizeof(pp->arg[0]) * pp->argc_stack); |
4271 | memset(&pp->arg[i], 0, sizeof(pp->arg[i])); |
4272 | pp->arg[i].reg = strdup(reg); |
4273 | pp->arg[i].type.name = strdup("int"); |
4274 | pp->argc++; |
4275 | pp->argc_reg++; |
4276 | } |
4277 | |
04f8a628 |
4278 | static void output_std_flags(FILE *fout, struct parsed_op *po, |
4279 | int *pfomask, const char *dst_opr_text) |
4280 | { |
4281 | if (*pfomask & (1 << PFO_Z)) { |
4282 | fprintf(fout, "\n cond_z = (%s%s == 0);", |
4283 | lmod_cast_u(po, po->operand[0].lmod), dst_opr_text); |
4284 | *pfomask &= ~(1 << PFO_Z); |
4285 | } |
4286 | if (*pfomask & (1 << PFO_S)) { |
4287 | fprintf(fout, "\n cond_s = (%s%s < 0);", |
4288 | lmod_cast_s(po, po->operand[0].lmod), dst_opr_text); |
4289 | *pfomask &= ~(1 << PFO_S); |
4290 | } |
4291 | } |
4292 | |
c0de9015 |
4293 | enum { |
4294 | OPP_FORCE_NORETURN = (1 << 0), |
4295 | OPP_SIMPLE_ARGS = (1 << 1), |
4296 | OPP_ALIGN = (1 << 2), |
4297 | }; |
4298 | |
c0050df6 |
4299 | static void output_pp_attrs(FILE *fout, const struct parsed_proto *pp, |
c0de9015 |
4300 | int flags) |
c0050df6 |
4301 | { |
c0de9015 |
4302 | const char *cconv = ""; |
4303 | |
c0050df6 |
4304 | if (pp->is_fastcall) |
c0de9015 |
4305 | cconv = "__fastcall "; |
c0050df6 |
4306 | else if (pp->is_stdcall && pp->argc_reg == 0) |
c0de9015 |
4307 | cconv = "__stdcall "; |
4308 | |
4309 | fprintf(fout, (flags & OPP_ALIGN) ? "%-16s" : "%s", cconv); |
4310 | |
4311 | if (pp->is_noreturn || (flags & OPP_FORCE_NORETURN)) |
c0050df6 |
4312 | fprintf(fout, "noreturn "); |
4313 | } |
4314 | |
c0de9015 |
4315 | static void output_pp(FILE *fout, const struct parsed_proto *pp, |
4316 | int flags) |
4317 | { |
4318 | int i; |
4319 | |
4320 | fprintf(fout, (flags & OPP_ALIGN) ? "%-5s" : "%s ", |
4321 | pp->ret_type.name); |
4322 | if (pp->is_fptr) |
4323 | fprintf(fout, "("); |
4324 | output_pp_attrs(fout, pp, flags); |
4325 | if (pp->is_fptr) |
4326 | fprintf(fout, "*"); |
4327 | fprintf(fout, "%s", pp->name); |
4328 | if (pp->is_fptr) |
4329 | fprintf(fout, ")"); |
4330 | |
4331 | fprintf(fout, "("); |
4332 | for (i = 0; i < pp->argc; i++) { |
4333 | if (i > 0) |
4334 | fprintf(fout, ", "); |
4335 | if (pp->arg[i].fptr != NULL && !(flags & OPP_SIMPLE_ARGS)) { |
4336 | // func pointer |
4337 | output_pp(fout, pp->arg[i].fptr, 0); |
4338 | } |
4339 | else if (pp->arg[i].type.is_retreg) { |
4340 | fprintf(fout, "u32 *r_%s", pp->arg[i].reg); |
4341 | } |
4342 | else { |
4343 | fprintf(fout, "%s", pp->arg[i].type.name); |
4344 | if (!pp->is_fptr) |
4345 | fprintf(fout, " a%d", i + 1); |
4346 | } |
4347 | } |
4348 | if (pp->is_vararg) { |
4349 | if (i > 0) |
4350 | fprintf(fout, ", "); |
4351 | fprintf(fout, "..."); |
4352 | } |
4353 | fprintf(fout, ")"); |
4354 | } |
4355 | |
9af2d373 |
4356 | static int get_pp_arg_regmask(const struct parsed_proto *pp) |
4357 | { |
4358 | int regmask = 0; |
4359 | int i, reg; |
4360 | |
4361 | for (i = 0; i < pp->argc; i++) { |
4362 | if (pp->arg[i].reg != NULL) { |
4363 | reg = char_array_i(regs_r32, |
4364 | ARRAY_SIZE(regs_r32), pp->arg[i].reg); |
4365 | if (reg < 0) |
4366 | ferr(ops, "arg '%s' of func '%s' is not a reg?\n", |
4367 | pp->arg[i].reg, pp->name); |
4368 | regmask |= 1 << reg; |
4369 | } |
4370 | } |
4371 | |
4372 | return regmask; |
4373 | } |
4374 | |
3a5101d7 |
4375 | static char *saved_arg_name(char *buf, size_t buf_size, int grp, int num) |
4376 | { |
4377 | char buf1[16]; |
4378 | |
4379 | buf1[0] = 0; |
4380 | if (grp > 0) |
4381 | snprintf(buf1, sizeof(buf1), "%d", grp); |
4382 | snprintf(buf, buf_size, "s%s_a%d", buf1, num); |
4383 | |
4384 | return buf; |
4385 | } |
4386 | |
9af2d373 |
4387 | static void gen_x_cleanup(int opcnt); |
4388 | |
91977a1c |
4389 | static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) |
4390 | { |
69a3cdfc |
4391 | struct parsed_op *po, *delayed_flag_op = NULL, *tmp_op; |
850c9265 |
4392 | struct parsed_opr *last_arith_dst = NULL; |
3ebea2cf |
4393 | char buf1[256], buf2[256], buf3[256], cast[64]; |
ddaf8bd7 |
4394 | struct parsed_proto *pp, *pp_tmp; |
4c45fa73 |
4395 | struct parsed_data *pd; |
1f84f6b3 |
4396 | unsigned int uval; |
3a5101d7 |
4397 | int save_arg_vars[MAX_ARG_GRP] = { 0, }; |
cb090db0 |
4398 | int cond_vars = 0; |
108e9fe3 |
4399 | int need_tmp_var = 0; |
2fe80fdb |
4400 | int need_tmp64 = 0; |
91977a1c |
4401 | int had_decl = 0; |
3ebea2cf |
4402 | int label_pending = 0; |
25a330eb |
4403 | int regmask_save = 0; // regs saved/restored in this func |
4404 | int regmask_arg = 0; // regs carrying function args (fastcall, etc) |
4405 | int regmask_now; // temp |
4406 | int regmask_init = 0; // regs that need zero initialization |
4407 | int regmask_pp = 0; // regs used in complex push-pop graph |
4408 | int regmask = 0; // used regs |
940e8e66 |
4409 | int pfomask = 0; |
64c59faf |
4410 | int found = 0; |
d4e3b5db |
4411 | int depth = 0; |
91977a1c |
4412 | int no_output; |
4c45fa73 |
4413 | int i, j, l; |
91977a1c |
4414 | int arg; |
91977a1c |
4415 | int reg; |
4416 | int ret; |
4417 | |
1bafb621 |
4418 | g_bp_frame = g_sp_frame = g_stack_fsz = 0; |
a2c1d768 |
4419 | g_stack_frame_used = 0; |
91977a1c |
4420 | |
36595fd2 |
4421 | g_func_pp = proto_parse(fhdr, funcn, 0); |
bd96f656 |
4422 | if (g_func_pp == NULL) |
91977a1c |
4423 | ferr(ops, "proto_parse failed for '%s'\n", funcn); |
4424 | |
9af2d373 |
4425 | regmask_arg = get_pp_arg_regmask(g_func_pp); |
91977a1c |
4426 | |
4427 | // pass1: |
87bf6cec |
4428 | // - resolve all branches |
66bdb2b0 |
4429 | // - parse calls with labels |
4430 | resolve_branches_parse_calls(opcnt); |
840257f6 |
4431 | |
66bdb2b0 |
4432 | // pass2: |
4433 | // - handle ebp/esp frame, remove ops related to it |
4434 | scan_prologue_epilogue(opcnt); |
87bf6cec |
4435 | |
4436 | // pass3: |
a2c1d768 |
4437 | // - remove dead labels |
1bafb621 |
4438 | for (i = 0; i < opcnt; i++) |
4439 | { |
d7857c3a |
4440 | if (g_labels[i] != NULL && g_label_refs[i].i == -1) { |
4441 | free(g_labels[i]); |
4442 | g_labels[i] = NULL; |
4443 | } |
66bdb2b0 |
4444 | } |
a2c1d768 |
4445 | |
66bdb2b0 |
4446 | // pass4: |
4447 | // - process trivial calls |
4448 | for (i = 0; i < opcnt; i++) |
4449 | { |
69a3cdfc |
4450 | po = &ops[i]; |
5e49b270 |
4451 | if (po->flags & (OPF_RMD|OPF_DONE)) |
91977a1c |
4452 | continue; |
850c9265 |
4453 | |
d4e3b5db |
4454 | if (po->op == OP_CALL) |
26677139 |
4455 | { |
4456 | pp = process_call_early(i, opcnt, &j); |
4457 | if (pp != NULL) { |
4458 | if (!(po->flags & OPF_ATAIL)) |
4459 | // since we know the args, try to collect them |
4460 | if (collect_call_args_early(po, i, pp, ®mask) != 0) |
4461 | pp = NULL; |
4462 | } |
4463 | |
4464 | if (pp != NULL) { |
4465 | if (j >= 0) { |
4466 | // commit esp adjust |
5e49b270 |
4467 | if (ops[j].op != OP_POP) |
4468 | patch_esp_adjust(&ops[j], pp->argc_stack * 4); |
bfacdc83 |
4469 | else { |
4470 | for (l = 0; l < pp->argc_stack; l++) |
4471 | ops[j + l].flags |= OPF_DONE | OPF_RMD; |
4472 | } |
26677139 |
4473 | } |
4474 | |
4475 | if (strstr(pp->ret_type.name, "int64")) |
4476 | need_tmp64 = 1; |
4477 | |
4478 | po->flags |= OPF_DONE; |
4479 | } |
4480 | } |
4481 | } |
4482 | |
66bdb2b0 |
4483 | // pass5: |
26677139 |
4484 | // - process calls |
ee2361b9 |
4485 | // - handle push <const>/pop pairs |
26677139 |
4486 | for (i = 0; i < opcnt; i++) |
4487 | { |
4488 | po = &ops[i]; |
5e49b270 |
4489 | if (po->flags & (OPF_RMD|OPF_DONE)) |
26677139 |
4490 | continue; |
4491 | |
4492 | if (po->op == OP_CALL && !(po->flags & OPF_DONE)) |
69a3cdfc |
4493 | { |
9af2d373 |
4494 | pp = process_call(i, opcnt); |
91977a1c |
4495 | |
2fe80fdb |
4496 | if (!pp->is_unresolved && !(po->flags & OPF_ATAIL)) { |
89ff3147 |
4497 | // since we know the args, collect them |
3a5101d7 |
4498 | collect_call_args(po, i, pp, ®mask, save_arg_vars, |
89ff3147 |
4499 | i + opcnt * 2); |
4500 | } |
2b43685d |
4501 | |
4502 | if (strstr(pp->ret_type.name, "int64")) |
2fe80fdb |
4503 | need_tmp64 = 1; |
91977a1c |
4504 | } |
ee2361b9 |
4505 | else if (po->op == OP_PUSH && !(po->flags & OPF_FARG) |
4506 | && !(po->flags & OPF_RSAVE) && po->operand[0].type == OPT_CONST) |
e83ea7ed |
4507 | { |
4508 | scan_for_pop_const(i, opcnt, i + opcnt * 12); |
4509 | } |
4510 | else if (po->op == OP_POP) |
4511 | scan_pushes_for_pop(i, opcnt, ®mask_pp); |
d4e3b5db |
4512 | } |
4513 | |
66bdb2b0 |
4514 | // pass6: |
d4e3b5db |
4515 | // - find POPs for PUSHes, rm both |
591721d7 |
4516 | // - scan for STD/CLD, propagate DF |
d4e3b5db |
4517 | // - scan for all used registers |
4518 | // - find flag set ops for their users |
89ff3147 |
4519 | // - do unreselved calls |
1bafb621 |
4520 | // - declare indirect functions |
26677139 |
4521 | for (i = 0; i < opcnt; i++) |
4522 | { |
d4e3b5db |
4523 | po = &ops[i]; |
5e49b270 |
4524 | if (po->flags & (OPF_RMD|OPF_DONE)) |
d4e3b5db |
4525 | continue; |
4526 | |
9af2d373 |
4527 | if (po->op == OP_PUSH && !(po->flags & OPF_FARG) |
1f84f6b3 |
4528 | && !(po->flags & OPF_RSAVE) && !g_func_pp->is_userstack) |
d4e3b5db |
4529 | { |
5c024ef7 |
4530 | if (po->operand[0].type == OPT_REG) |
4531 | { |
4532 | reg = po->operand[0].reg; |
4533 | if (reg < 0) |
4534 | ferr(po, "reg not set for push?\n"); |
4535 | |
e83ea7ed |
4536 | // FIXME: OPF_RSAVE, regmask_save |
5c024ef7 |
4537 | depth = 0; |
e83ea7ed |
4538 | ret = scan_for_pop(i + 1, opcnt, i + opcnt * 3, |
4539 | po->operand[0].reg, 0, &depth, 0); |
5c024ef7 |
4540 | if (ret == 1) { |
e83ea7ed |
4541 | if (depth > 0) |
5c024ef7 |
4542 | ferr(po, "too much depth: %d\n", depth); |
4543 | |
4544 | po->flags |= OPF_RMD; |
e83ea7ed |
4545 | scan_for_pop(i + 1, opcnt, i + opcnt * 4, |
4546 | po->operand[0].reg, 0, &depth, 1); |
5c024ef7 |
4547 | continue; |
4548 | } |
e83ea7ed |
4549 | ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, 0); |
5c024ef7 |
4550 | if (ret == 0) { |
4551 | arg = OPF_RMD; |
4552 | if (regmask & (1 << reg)) { |
4553 | if (regmask_save & (1 << reg)) |
4554 | ferr(po, "%s already saved?\n", po->operand[0].name); |
e83ea7ed |
4555 | // arg = OPF_RSAVE; // FIXME |
5c024ef7 |
4556 | } |
4557 | po->flags |= arg; |
e83ea7ed |
4558 | scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, arg); |
5c024ef7 |
4559 | continue; |
4560 | } |
d4e3b5db |
4561 | } |
d4e3b5db |
4562 | } |
4563 | |
591721d7 |
4564 | if (po->op == OP_STD) { |
5e49b270 |
4565 | po->flags |= OPF_DF | OPF_RMD | OPF_DONE; |
591721d7 |
4566 | scan_propagate_df(i + 1, opcnt); |
4567 | } |
4568 | |
a3684be1 |
4569 | regmask_now = po->regmask_src | po->regmask_dst; |
4570 | if (regmask_now & (1 << xBP)) { |
4571 | if (g_bp_frame && !(po->flags & OPF_EBP_S)) { |
4572 | if (po->regmask_dst & (1 << xBP)) |
4573 | // compiler decided to drop bp frame and use ebp as scratch |
037f4971 |
4574 | scan_fwd_set_flags(i + 1, opcnt, i + opcnt * 5, OPF_EBP_S); |
a3684be1 |
4575 | else |
4576 | regmask_now &= ~(1 << xBP); |
4577 | } |
4578 | } |
4579 | |
4580 | regmask |= regmask_now; |
d4e3b5db |
4581 | |
4582 | if (po->flags & OPF_CC) |
4583 | { |
2b43685d |
4584 | int setters[16], cnt = 0, branched = 0; |
4585 | |
04f8a628 |
4586 | ret = scan_for_flag_set(i, i + opcnt * 6, |
4587 | &branched, setters, &cnt); |
2b43685d |
4588 | if (ret < 0 || cnt <= 0) |
4589 | ferr(po, "unable to trace flag setter(s)\n"); |
4590 | if (cnt > ARRAY_SIZE(setters)) |
4591 | ferr(po, "too many flag setters\n"); |
d4e3b5db |
4592 | |
2b43685d |
4593 | for (j = 0; j < cnt; j++) |
4594 | { |
4595 | tmp_op = &ops[setters[j]]; // flag setter |
4596 | pfomask = 0; |
4597 | |
4598 | // to get nicer code, we try to delay test and cmp; |
4599 | // if we can't because of operand modification, or if we |
591721d7 |
4600 | // have arith op, or branch, make it calculate flags explicitly |
4601 | if (tmp_op->op == OP_TEST || tmp_op->op == OP_CMP) |
4602 | { |
89ff3147 |
4603 | if (branched || scan_for_mod(tmp_op, setters[j] + 1, i, 0) >= 0) |
092f64e1 |
4604 | pfomask = 1 << po->pfo; |
2b43685d |
4605 | } |
4741fdfe |
4606 | else if (tmp_op->op == OP_CMPS || tmp_op->op == OP_SCAS) { |
092f64e1 |
4607 | pfomask = 1 << po->pfo; |
591721d7 |
4608 | } |
2b43685d |
4609 | else { |
04f8a628 |
4610 | // see if we'll be able to handle based on op result |
4611 | if ((tmp_op->op != OP_AND && tmp_op->op != OP_OR |
092f64e1 |
4612 | && po->pfo != PFO_Z && po->pfo != PFO_S |
4613 | && po->pfo != PFO_P) |
04f8a628 |
4614 | || branched |
2b43685d |
4615 | || scan_for_mod_opr0(tmp_op, setters[j] + 1, i) >= 0) |
092f64e1 |
4616 | { |
4617 | pfomask = 1 << po->pfo; |
4618 | } |
2fe80fdb |
4619 | |
c8dbc5be |
4620 | if (tmp_op->op == OP_ADD && po->pfo == PFO_C) { |
4621 | propagate_lmod(tmp_op, &tmp_op->operand[0], |
4622 | &tmp_op->operand[1]); |
4623 | if (tmp_op->operand[0].lmod == OPLM_DWORD) |
4624 | need_tmp64 = 1; |
4625 | } |
2b43685d |
4626 | } |
4627 | if (pfomask) { |
4628 | tmp_op->pfomask |= pfomask; |
cb090db0 |
4629 | cond_vars |= pfomask; |
2b43685d |
4630 | } |
04f8a628 |
4631 | // note: may overwrite, currently not a problem |
4632 | po->datap = tmp_op; |
d4e3b5db |
4633 | } |
4634 | |
cb090db0 |
4635 | if (po->op == OP_RCL || po->op == OP_RCR |
4636 | || po->op == OP_ADC || po->op == OP_SBB) |
4637 | cond_vars |= 1 << PFO_C; |
d4e3b5db |
4638 | } |
092f64e1 |
4639 | |
4640 | if (po->op == OP_CMPS || po->op == OP_SCAS) { |
cb090db0 |
4641 | cond_vars |= 1 << PFO_Z; |
591721d7 |
4642 | } |
87bf6cec |
4643 | else if (po->op == OP_MUL |
4644 | || (po->op == OP_IMUL && po->operand_cnt == 1)) |
4645 | { |
c8dbc5be |
4646 | if (po->operand[0].lmod == OPLM_DWORD) |
4647 | need_tmp64 = 1; |
87bf6cec |
4648 | } |
89ff3147 |
4649 | else if (po->op == OP_CALL) { |
26677139 |
4650 | // note: resolved non-reg calls are OPF_DONE already |
092f64e1 |
4651 | pp = po->pp; |
89ff3147 |
4652 | if (pp == NULL) |
4653 | ferr(po, "NULL pp\n"); |
4654 | |
4655 | if (pp->is_unresolved) { |
ddaf8bd7 |
4656 | int regmask_stack = 0; |
3a5101d7 |
4657 | collect_call_args(po, i, pp, ®mask, save_arg_vars, |
89ff3147 |
4658 | i + opcnt * 2); |
4659 | |
b74c31e3 |
4660 | // this is pretty rough guess: |
4661 | // see ecx and edx were pushed (and not their saved versions) |
4662 | for (arg = 0; arg < pp->argc; arg++) { |
4663 | if (pp->arg[arg].reg != NULL) |
4664 | continue; |
4665 | |
4666 | tmp_op = pp->arg[arg].datap; |
4667 | if (tmp_op == NULL) |
4668 | ferr(po, "parsed_op missing for arg%d\n", arg); |
5f70a34f |
4669 | if (tmp_op->p_argnum == 0 && tmp_op->operand[0].type == OPT_REG) |
b74c31e3 |
4670 | regmask_stack |= 1 << tmp_op->operand[0].reg; |
4671 | } |
4672 | |
ddaf8bd7 |
4673 | if (!((regmask_stack & (1 << xCX)) |
4674 | && (regmask_stack & (1 << xDX)))) |
89ff3147 |
4675 | { |
4676 | if (pp->argc_stack != 0 |
c0050df6 |
4677 | || ((regmask | regmask_arg) & ((1 << xCX)|(1 << xDX)))) |
89ff3147 |
4678 | { |
4679 | pp_insert_reg_arg(pp, "ecx"); |
c0050df6 |
4680 | pp->is_fastcall = 1; |
ddaf8bd7 |
4681 | regmask_init |= 1 << xCX; |
89ff3147 |
4682 | regmask |= 1 << xCX; |
4683 | } |
4684 | if (pp->argc_stack != 0 |
4685 | || ((regmask | regmask_arg) & (1 << xDX))) |
4686 | { |
4687 | pp_insert_reg_arg(pp, "edx"); |
ddaf8bd7 |
4688 | regmask_init |= 1 << xDX; |
89ff3147 |
4689 | regmask |= 1 << xDX; |
4690 | } |
4691 | } |
c0050df6 |
4692 | |
4693 | // note: __cdecl doesn't fall into is_unresolved category |
4694 | if (pp->argc_stack > 0) |
4695 | pp->is_stdcall = 1; |
ddaf8bd7 |
4696 | } |
4697 | |
4698 | for (arg = 0; arg < pp->argc; arg++) { |
4699 | if (pp->arg[arg].reg != NULL) { |
4700 | reg = char_array_i(regs_r32, |
4701 | ARRAY_SIZE(regs_r32), pp->arg[arg].reg); |
4702 | if (reg < 0) |
4703 | ferr(ops, "arg '%s' is not a reg?\n", pp->arg[arg].reg); |
4704 | if (!(regmask & (1 << reg))) { |
4705 | regmask_init |= 1 << reg; |
4706 | regmask |= 1 << reg; |
4707 | } |
4708 | } |
89ff3147 |
4709 | } |
1bafb621 |
4710 | } |
27ebfaed |
4711 | else if (po->op == OP_MOV && po->operand[0].pp != NULL |
4712 | && po->operand[1].pp != NULL) |
4713 | { |
4714 | // <var> = offset <something> |
4715 | if ((po->operand[1].pp->is_func || po->operand[1].pp->is_fptr) |
4716 | && !IS_START(po->operand[1].name, "off_")) |
4717 | { |
4718 | if (!po->operand[0].pp->is_fptr) |
4719 | ferr(po, "%s not declared as fptr when it should be\n", |
4720 | po->operand[0].name); |
4721 | if (pp_cmp_func(po->operand[0].pp, po->operand[1].pp)) { |
4722 | pp_print(buf1, sizeof(buf1), po->operand[0].pp); |
4723 | pp_print(buf2, sizeof(buf2), po->operand[1].pp); |
4724 | fnote(po, "var: %s\n", buf1); |
4725 | fnote(po, "func: %s\n", buf2); |
4726 | ferr(po, "^ mismatch\n"); |
4727 | } |
4728 | } |
4729 | } |
75ad0378 |
4730 | else if (po->op == OP_RET && !IS(g_func_pp->ret_type.name, "void")) |
4731 | regmask |= 1 << xAX; |
cb090db0 |
4732 | else if (po->op == OP_DIV || po->op == OP_IDIV) { |
4733 | // 32bit division is common, look for it |
4734 | if (po->op == OP_DIV) |
4735 | ret = scan_for_reg_clear(i, xDX); |
4736 | else |
4737 | ret = scan_for_cdq_edx(i); |
4738 | if (ret >= 0) |
4739 | po->flags |= OPF_32BIT; |
4740 | else |
4741 | need_tmp64 = 1; |
4742 | } |
037f4971 |
4743 | else if (po->op == OP_CLD) |
5e49b270 |
4744 | po->flags |= OPF_RMD | OPF_DONE; |
cb090db0 |
4745 | |
4746 | if (po->op == OP_RCL || po->op == OP_RCR || po->op == OP_XCHG) { |
4747 | need_tmp_var = 1; |
4748 | } |
91977a1c |
4749 | } |
4750 | |
66bdb2b0 |
4751 | // pass7: |
da87ae38 |
4752 | // - confirm regmask_save, it might have been reduced |
4753 | if (regmask_save != 0) |
4754 | { |
4755 | regmask_save = 0; |
4756 | for (i = 0; i < opcnt; i++) { |
4757 | po = &ops[i]; |
4758 | if (po->flags & OPF_RMD) |
4759 | continue; |
4760 | |
4761 | if (po->op == OP_PUSH && (po->flags & OPF_RSAVE)) |
4762 | regmask_save |= 1 << po->operand[0].reg; |
4763 | } |
4764 | } |
4765 | |
60fe410c |
4766 | // output starts here |
4767 | |
4768 | // define userstack size |
4769 | if (g_func_pp->is_userstack) { |
4770 | fprintf(fout, "#ifndef US_SZ_%s\n", g_func_pp->name); |
4771 | fprintf(fout, "#define US_SZ_%s USERSTACK_SIZE\n", g_func_pp->name); |
4772 | fprintf(fout, "#endif\n"); |
4773 | } |
4774 | |
4775 | // the function itself |
c0de9015 |
4776 | ferr_assert(ops, !g_func_pp->is_fptr); |
4777 | output_pp(fout, g_func_pp, |
4778 | (g_ida_func_attr & IDAFA_NORETURN) ? OPP_FORCE_NORETURN : 0); |
4779 | fprintf(fout, "\n{\n"); |
60fe410c |
4780 | |
4781 | // declare indirect functions |
4782 | for (i = 0; i < opcnt; i++) { |
4783 | po = &ops[i]; |
4784 | if (po->flags & OPF_RMD) |
4785 | continue; |
4786 | |
4787 | if (po->op == OP_CALL) { |
4788 | pp = po->pp; |
4789 | if (pp == NULL) |
4790 | ferr(po, "NULL pp\n"); |
4791 | |
4792 | if (pp->is_fptr && !(pp->name[0] != 0 && pp->is_arg)) { |
4793 | if (pp->name[0] != 0) { |
4794 | memmove(pp->name + 2, pp->name, strlen(pp->name) + 1); |
4795 | memcpy(pp->name, "i_", 2); |
4796 | |
4797 | // might be declared already |
4798 | found = 0; |
4799 | for (j = 0; j < i; j++) { |
4800 | if (ops[j].op == OP_CALL && (pp_tmp = ops[j].pp)) { |
4801 | if (pp_tmp->is_fptr && IS(pp->name, pp_tmp->name)) { |
4802 | found = 1; |
4803 | break; |
4804 | } |
4805 | } |
4806 | } |
4807 | if (found) |
4808 | continue; |
4809 | } |
4810 | else |
4811 | snprintf(pp->name, sizeof(pp->name), "icall%d", i); |
4812 | |
c0de9015 |
4813 | fprintf(fout, " "); |
4814 | output_pp(fout, pp, OPP_SIMPLE_ARGS); |
4815 | fprintf(fout, ";\n"); |
60fe410c |
4816 | } |
4817 | } |
4818 | } |
da87ae38 |
4819 | |
4c45fa73 |
4820 | // output LUTs/jumptables |
4821 | for (i = 0; i < g_func_pd_cnt; i++) { |
4822 | pd = &g_func_pd[i]; |
4823 | fprintf(fout, " static const "); |
4824 | if (pd->type == OPT_OFFSET) { |
4825 | fprintf(fout, "void *jt_%s[] =\n { ", pd->label); |
4826 | |
4827 | for (j = 0; j < pd->count; j++) { |
4828 | if (j > 0) |
4829 | fprintf(fout, ", "); |
4830 | fprintf(fout, "&&%s", pd->d[j].u.label); |
4831 | } |
4832 | } |
4833 | else { |
4834 | fprintf(fout, "%s %s[] =\n { ", |
4835 | lmod_type_u(ops, pd->lmod), pd->label); |
4836 | |
4837 | for (j = 0; j < pd->count; j++) { |
4838 | if (j > 0) |
4839 | fprintf(fout, ", "); |
4840 | fprintf(fout, "%u", pd->d[j].u.val); |
4841 | } |
4842 | } |
4843 | fprintf(fout, " };\n"); |
1f84f6b3 |
4844 | had_decl = 1; |
4c45fa73 |
4845 | } |
4846 | |
4f12f671 |
4847 | // declare stack frame, va_arg |
1f84f6b3 |
4848 | if (g_stack_fsz) { |
850c9265 |
4849 | fprintf(fout, " union { u32 d[%d]; u16 w[%d]; u8 b[%d]; } sf;\n", |
1bafb621 |
4850 | (g_stack_fsz + 3) / 4, (g_stack_fsz + 1) / 2, g_stack_fsz); |
1f84f6b3 |
4851 | had_decl = 1; |
4852 | } |
4853 | |
4854 | if (g_func_pp->is_userstack) { |
60fe410c |
4855 | fprintf(fout, " u32 fake_sf[US_SZ_%s / 4];\n", g_func_pp->name); |
4856 | fprintf(fout, " u32 *esp = &fake_sf[sizeof(fake_sf) / 4];\n"); |
1f84f6b3 |
4857 | had_decl = 1; |
4858 | } |
850c9265 |
4859 | |
1f84f6b3 |
4860 | if (g_func_pp->is_vararg) { |
4f12f671 |
4861 | fprintf(fout, " va_list ap;\n"); |
1f84f6b3 |
4862 | had_decl = 1; |
4863 | } |
4f12f671 |
4864 | |
940e8e66 |
4865 | // declare arg-registers |
bd96f656 |
4866 | for (i = 0; i < g_func_pp->argc; i++) { |
4867 | if (g_func_pp->arg[i].reg != NULL) { |
91977a1c |
4868 | reg = char_array_i(regs_r32, |
bd96f656 |
4869 | ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg); |
75ad0378 |
4870 | if (regmask & (1 << reg)) { |
1f84f6b3 |
4871 | if (g_func_pp->arg[i].type.is_retreg) |
4872 | fprintf(fout, " u32 %s = *r_%s;\n", |
4873 | g_func_pp->arg[i].reg, g_func_pp->arg[i].reg); |
4874 | else |
4875 | fprintf(fout, " u32 %s = (u32)a%d;\n", |
4876 | g_func_pp->arg[i].reg, i + 1); |
75ad0378 |
4877 | } |
1f84f6b3 |
4878 | else { |
4879 | if (g_func_pp->arg[i].type.is_retreg) |
4880 | ferr(ops, "retreg '%s' is unused?\n", |
4881 | g_func_pp->arg[i].reg); |
75ad0378 |
4882 | fprintf(fout, " // %s = a%d; // unused\n", |
4883 | g_func_pp->arg[i].reg, i + 1); |
1f84f6b3 |
4884 | } |
91977a1c |
4885 | had_decl = 1; |
4886 | } |
4887 | } |
4888 | |
25a330eb |
4889 | // declare normal registers |
75ad0378 |
4890 | regmask_now = regmask & ~regmask_arg; |
4891 | regmask_now &= ~(1 << xSP); |
90307a99 |
4892 | if (regmask_now & 0x00ff) { |
91977a1c |
4893 | for (reg = 0; reg < 8; reg++) { |
75ad0378 |
4894 | if (regmask_now & (1 << reg)) { |
ddaf8bd7 |
4895 | fprintf(fout, " u32 %s", regs_r32[reg]); |
4896 | if (regmask_init & (1 << reg)) |
4897 | fprintf(fout, " = 0"); |
4898 | fprintf(fout, ";\n"); |
91977a1c |
4899 | had_decl = 1; |
4900 | } |
4901 | } |
4902 | } |
90307a99 |
4903 | if (regmask_now & 0xff00) { |
4904 | for (reg = 8; reg < 16; reg++) { |
4905 | if (regmask_now & (1 << reg)) { |
4906 | fprintf(fout, " mmxr %s", regs_r32[reg]); |
4907 | if (regmask_init & (1 << reg)) |
4908 | fprintf(fout, " = { 0, }"); |
4909 | fprintf(fout, ";\n"); |
4910 | had_decl = 1; |
4911 | } |
4912 | } |
4913 | } |
91977a1c |
4914 | |
d4e3b5db |
4915 | if (regmask_save) { |
4916 | for (reg = 0; reg < 8; reg++) { |
4917 | if (regmask_save & (1 << reg)) { |
4918 | fprintf(fout, " u32 s_%s;\n", regs_r32[reg]); |
4919 | had_decl = 1; |
4920 | } |
4921 | } |
4922 | } |
4923 | |
3a5101d7 |
4924 | for (i = 0; i < ARRAY_SIZE(save_arg_vars); i++) { |
4925 | if (save_arg_vars[i] == 0) |
4926 | continue; |
69a3cdfc |
4927 | for (reg = 0; reg < 32; reg++) { |
3a5101d7 |
4928 | if (save_arg_vars[i] & (1 << reg)) { |
4929 | fprintf(fout, " u32 %s;\n", |
4930 | saved_arg_name(buf1, sizeof(buf1), i, reg + 1)); |
69a3cdfc |
4931 | had_decl = 1; |
4932 | } |
4933 | } |
4934 | } |
4935 | |
25a330eb |
4936 | // declare push-pop temporaries |
4937 | if (regmask_pp) { |
4938 | for (reg = 0; reg < 8; reg++) { |
4939 | if (regmask_pp & (1 << reg)) { |
4940 | fprintf(fout, " u32 pp_%s;\n", regs_r32[reg]); |
4941 | had_decl = 1; |
4942 | } |
4943 | } |
4944 | } |
4945 | |
cb090db0 |
4946 | if (cond_vars) { |
69a3cdfc |
4947 | for (i = 0; i < 8; i++) { |
cb090db0 |
4948 | if (cond_vars & (1 << i)) { |
69a3cdfc |
4949 | fprintf(fout, " u32 cond_%s;\n", parsed_flag_op_names[i]); |
4950 | had_decl = 1; |
4951 | } |
4952 | } |
4953 | } |
4954 | |
108e9fe3 |
4955 | if (need_tmp_var) { |
4956 | fprintf(fout, " u32 tmp;\n"); |
4957 | had_decl = 1; |
4958 | } |
4959 | |
2fe80fdb |
4960 | if (need_tmp64) { |
4961 | fprintf(fout, " u64 tmp64;\n"); |
87bf6cec |
4962 | had_decl = 1; |
4963 | } |
4964 | |
91977a1c |
4965 | if (had_decl) |
4966 | fprintf(fout, "\n"); |
4967 | |
bd96f656 |
4968 | if (g_func_pp->is_vararg) { |
4969 | if (g_func_pp->argc_stack == 0) |
4f12f671 |
4970 | ferr(ops, "vararg func without stack args?\n"); |
bd96f656 |
4971 | fprintf(fout, " va_start(ap, a%d);\n", g_func_pp->argc); |
4f12f671 |
4972 | } |
4973 | |
91977a1c |
4974 | // output ops |
69a3cdfc |
4975 | for (i = 0; i < opcnt; i++) |
4976 | { |
d7857c3a |
4977 | if (g_labels[i] != NULL) { |
91977a1c |
4978 | fprintf(fout, "\n%s:\n", g_labels[i]); |
3ebea2cf |
4979 | label_pending = 1; |
2b43685d |
4980 | |
4981 | delayed_flag_op = NULL; |
4982 | last_arith_dst = NULL; |
3ebea2cf |
4983 | } |
91977a1c |
4984 | |
69a3cdfc |
4985 | po = &ops[i]; |
4986 | if (po->flags & OPF_RMD) |
91977a1c |
4987 | continue; |
4988 | |
4989 | no_output = 0; |
4990 | |
91977a1c |
4991 | #define assert_operand_cnt(n_) \ |
850c9265 |
4992 | if (po->operand_cnt != n_) \ |
4993 | ferr(po, "operand_cnt is %d/%d\n", po->operand_cnt, n_) |
4994 | |
69a3cdfc |
4995 | // conditional/flag using op? |
4996 | if (po->flags & OPF_CC) |
850c9265 |
4997 | { |
940e8e66 |
4998 | int is_delayed = 0; |
69a3cdfc |
4999 | |
04f8a628 |
5000 | tmp_op = po->datap; |
850c9265 |
5001 | |
69a3cdfc |
5002 | // we go through all this trouble to avoid using parsed_flag_op, |
5003 | // which makes generated code much nicer |
5004 | if (delayed_flag_op != NULL) |
850c9265 |
5005 | { |
092f64e1 |
5006 | out_cmp_test(buf1, sizeof(buf1), delayed_flag_op, |
5007 | po->pfo, po->pfo_inv); |
940e8e66 |
5008 | is_delayed = 1; |
91977a1c |
5009 | } |
850c9265 |
5010 | else if (last_arith_dst != NULL |
092f64e1 |
5011 | && (po->pfo == PFO_Z || po->pfo == PFO_S || po->pfo == PFO_P |
04f8a628 |
5012 | || (tmp_op && (tmp_op->op == OP_AND || tmp_op->op == OP_OR)) |
5013 | )) |
850c9265 |
5014 | { |
3ebea2cf |
5015 | out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst); |
092f64e1 |
5016 | out_test_for_cc(buf1, sizeof(buf1), po, po->pfo, po->pfo_inv, |
850c9265 |
5017 | last_arith_dst->lmod, buf3); |
940e8e66 |
5018 | is_delayed = 1; |
850c9265 |
5019 | } |
04f8a628 |
5020 | else if (tmp_op != NULL) { |
7ba45c34 |
5021 | // use preprocessed flag calc results |
092f64e1 |
5022 | if (!(tmp_op->pfomask & (1 << po->pfo))) |
5023 | ferr(po, "not prepared for pfo %d\n", po->pfo); |
69a3cdfc |
5024 | |
092f64e1 |
5025 | // note: pfo_inv was not yet applied |
69a3cdfc |
5026 | snprintf(buf1, sizeof(buf1), "(%scond_%s)", |
092f64e1 |
5027 | po->pfo_inv ? "!" : "", parsed_flag_op_names[po->pfo]); |
69a3cdfc |
5028 | } |
5029 | else { |
5030 | ferr(po, "all methods of finding comparison failed\n"); |
5031 | } |
850c9265 |
5032 | |
69a3cdfc |
5033 | if (po->flags & OPF_JMP) { |
092f64e1 |
5034 | fprintf(fout, " if %s", buf1); |
850c9265 |
5035 | } |
cb090db0 |
5036 | else if (po->op == OP_RCL || po->op == OP_RCR |
5037 | || po->op == OP_ADC || po->op == OP_SBB) |
5038 | { |
940e8e66 |
5039 | if (is_delayed) |
5040 | fprintf(fout, " cond_%s = %s;\n", |
092f64e1 |
5041 | parsed_flag_op_names[po->pfo], buf1); |
850c9265 |
5042 | } |
5101a5f9 |
5043 | else if (po->flags & OPF_DATA) { // SETcc |
850c9265 |
5044 | out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]); |
5045 | fprintf(fout, " %s = %s;", buf2, buf1); |
91977a1c |
5046 | } |
69a3cdfc |
5047 | else { |
5048 | ferr(po, "unhandled conditional op\n"); |
5049 | } |
91977a1c |
5050 | } |
5051 | |
940e8e66 |
5052 | pfomask = po->pfomask; |
5053 | |
4741fdfe |
5054 | if (po->flags & (OPF_REPZ|OPF_REPNZ)) { |
1f84f6b3 |
5055 | struct parsed_opr opr = {0,}; |
5056 | opr.type = OPT_REG; |
5057 | opr.reg = xCX; |
5058 | opr.lmod = OPLM_DWORD; |
5059 | ret = try_resolve_const(i, &opr, opcnt * 7 + i, &uval); |
5060 | |
5061 | if (ret != 1 || uval == 0) { |
5062 | // we need initial flags for ecx=0 case.. |
5063 | if (i > 0 && ops[i - 1].op == OP_XOR |
5064 | && IS(ops[i - 1].operand[0].name, |
5065 | ops[i - 1].operand[1].name)) |
5066 | { |
5067 | fprintf(fout, " cond_z = "); |
5068 | if (pfomask & (1 << PFO_C)) |
5069 | fprintf(fout, "cond_c = "); |
5070 | fprintf(fout, "0;\n"); |
5071 | } |
5072 | else if (last_arith_dst != NULL) { |
5073 | out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst); |
5074 | out_test_for_cc(buf1, sizeof(buf1), po, PFO_Z, 0, |
5075 | last_arith_dst->lmod, buf3); |
5076 | fprintf(fout, " cond_z = %s;\n", buf1); |
5077 | } |
5078 | else |
5079 | ferr(po, "missing initial ZF\n"); |
4741fdfe |
5080 | } |
4741fdfe |
5081 | } |
5082 | |
850c9265 |
5083 | switch (po->op) |
91977a1c |
5084 | { |
5085 | case OP_MOV: |
5086 | assert_operand_cnt(2); |
850c9265 |
5087 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
de50b98b |
5088 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
c7ed83dd |
5089 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]); |
de50b98b |
5090 | fprintf(fout, " %s = %s;", buf1, |
3ebea2cf |
5091 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
c7ed83dd |
5092 | buf3, 0)); |
850c9265 |
5093 | break; |
5094 | |
5095 | case OP_LEA: |
5096 | assert_operand_cnt(2); |
87bf6cec |
5097 | po->operand[1].lmod = OPLM_DWORD; // always |
850c9265 |
5098 | fprintf(fout, " %s = %s;", |
5099 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
5100 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
5101 | NULL, 1)); |
850c9265 |
5102 | break; |
5103 | |
5104 | case OP_MOVZX: |
5105 | assert_operand_cnt(2); |
91977a1c |
5106 | fprintf(fout, " %s = %s;", |
850c9265 |
5107 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
5108 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
850c9265 |
5109 | break; |
5110 | |
5111 | case OP_MOVSX: |
5112 | assert_operand_cnt(2); |
5113 | switch (po->operand[1].lmod) { |
5114 | case OPLM_BYTE: |
5115 | strcpy(buf3, "(s8)"); |
5116 | break; |
5117 | case OPLM_WORD: |
5118 | strcpy(buf3, "(s16)"); |
5119 | break; |
5120 | default: |
5121 | ferr(po, "invalid src lmod: %d\n", po->operand[1].lmod); |
5122 | } |
a2c1d768 |
5123 | fprintf(fout, " %s = %s;", |
850c9265 |
5124 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
a2c1d768 |
5125 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
5126 | buf3, 0)); |
850c9265 |
5127 | break; |
5128 | |
108e9fe3 |
5129 | case OP_XCHG: |
5130 | assert_operand_cnt(2); |
5131 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
5132 | fprintf(fout, " tmp = %s;", |
5133 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], "", 0)); |
5134 | fprintf(fout, " %s = %s;", |
5135 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
c7ed83dd |
5136 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
5137 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0)); |
5138 | fprintf(fout, " %s = %stmp;", |
5139 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[1]), |
5140 | default_cast_to(buf3, sizeof(buf3), &po->operand[1])); |
108e9fe3 |
5141 | snprintf(g_comment, sizeof(g_comment), "xchg"); |
5142 | break; |
5143 | |
850c9265 |
5144 | case OP_NOT: |
5145 | assert_operand_cnt(1); |
5146 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
5147 | fprintf(fout, " %s = ~%s;", buf1, buf1); |
5148 | break; |
5149 | |
04abc5d6 |
5150 | case OP_XLAT: |
5151 | assert_operand_cnt(2); |
5152 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
5153 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
5154 | fprintf(fout, " %s = *(u8 *)(%s + %s);", buf1, buf2, buf1); |
5155 | strcpy(g_comment, "xlat"); |
5156 | break; |
5157 | |
5101a5f9 |
5158 | case OP_CDQ: |
5159 | assert_operand_cnt(2); |
5160 | fprintf(fout, " %s = (s32)%s >> 31;", |
5161 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
5162 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
5101a5f9 |
5163 | strcpy(g_comment, "cdq"); |
5164 | break; |
5165 | |
092f64e1 |
5166 | case OP_LODS: |
5167 | assert_operand_cnt(3); |
5168 | if (po->flags & OPF_REP) { |
5169 | // hmh.. |
5170 | ferr(po, "TODO\n"); |
5171 | } |
5172 | else { |
05381e4a |
5173 | fprintf(fout, " eax = %sesi; esi %c= %d;", |
092f64e1 |
5174 | lmod_cast_u_ptr(po, po->operand[0].lmod), |
5175 | (po->flags & OPF_DF) ? '-' : '+', |
5176 | lmod_bytes(po, po->operand[0].lmod)); |
5177 | strcpy(g_comment, "lods"); |
5178 | } |
5179 | break; |
5180 | |
33c35af6 |
5181 | case OP_STOS: |
33c35af6 |
5182 | assert_operand_cnt(3); |
5183 | if (po->flags & OPF_REP) { |
591721d7 |
5184 | fprintf(fout, " for (; ecx != 0; ecx--, edi %c= %d)\n", |
5185 | (po->flags & OPF_DF) ? '-' : '+', |
33c35af6 |
5186 | lmod_bytes(po, po->operand[0].lmod)); |
d4e3b5db |
5187 | fprintf(fout, " %sedi = eax;", |
5188 | lmod_cast_u_ptr(po, po->operand[0].lmod)); |
33c35af6 |
5189 | strcpy(g_comment, "rep stos"); |
5190 | } |
5191 | else { |
092f64e1 |
5192 | fprintf(fout, " %sedi = eax; edi %c= %d;", |
d4e3b5db |
5193 | lmod_cast_u_ptr(po, po->operand[0].lmod), |
591721d7 |
5194 | (po->flags & OPF_DF) ? '-' : '+', |
33c35af6 |
5195 | lmod_bytes(po, po->operand[0].lmod)); |
5196 | strcpy(g_comment, "stos"); |
5197 | } |
5198 | break; |
5199 | |
d4e3b5db |
5200 | case OP_MOVS: |
d4e3b5db |
5201 | assert_operand_cnt(3); |
5202 | j = lmod_bytes(po, po->operand[0].lmod); |
5203 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
591721d7 |
5204 | l = (po->flags & OPF_DF) ? '-' : '+'; |
d4e3b5db |
5205 | if (po->flags & OPF_REP) { |
5206 | fprintf(fout, |
591721d7 |
5207 | " for (; ecx != 0; ecx--, edi %c= %d, esi %c= %d)\n", |
5208 | l, j, l, j); |
d4e3b5db |
5209 | fprintf(fout, |
5210 | " %sedi = %sesi;", buf1, buf1); |
5211 | strcpy(g_comment, "rep movs"); |
5212 | } |
5213 | else { |
092f64e1 |
5214 | fprintf(fout, " %sedi = %sesi; edi %c= %d; esi %c= %d;", |
591721d7 |
5215 | buf1, buf1, l, j, l, j); |
d4e3b5db |
5216 | strcpy(g_comment, "movs"); |
5217 | } |
5218 | break; |
5219 | |
7ba45c34 |
5220 | case OP_CMPS: |
7ba45c34 |
5221 | // repe ~ repeat while ZF=1 |
5222 | assert_operand_cnt(3); |
5223 | j = lmod_bytes(po, po->operand[0].lmod); |
5224 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
591721d7 |
5225 | l = (po->flags & OPF_DF) ? '-' : '+'; |
7ba45c34 |
5226 | if (po->flags & OPF_REP) { |
5227 | fprintf(fout, |
1f84f6b3 |
5228 | " for (; ecx != 0; ecx--) {\n"); |
4741fdfe |
5229 | if (pfomask & (1 << PFO_C)) { |
5230 | // ugh.. |
5231 | fprintf(fout, |
05381e4a |
5232 | " cond_c = %sesi < %sedi;\n", buf1, buf1); |
4741fdfe |
5233 | pfomask &= ~(1 << PFO_C); |
5234 | } |
7ba45c34 |
5235 | fprintf(fout, |
05381e4a |
5236 | " cond_z = (%sesi == %sedi); esi %c= %d, edi %c= %d;\n", |
1f84f6b3 |
5237 | buf1, buf1, l, j, l, j); |
5238 | fprintf(fout, |
5239 | " if (cond_z %s 0) break;\n", |
5240 | (po->flags & OPF_REPZ) ? "==" : "!="); |
7ba45c34 |
5241 | fprintf(fout, |
4741fdfe |
5242 | " }"); |
7ba45c34 |
5243 | snprintf(g_comment, sizeof(g_comment), "rep%s cmps", |
5244 | (po->flags & OPF_REPZ) ? "e" : "ne"); |
5245 | } |
5246 | else { |
5247 | fprintf(fout, |
05381e4a |
5248 | " cond_z = (%sesi == %sedi); esi %c= %d; edi %c= %d;", |
591721d7 |
5249 | buf1, buf1, l, j, l, j); |
7ba45c34 |
5250 | strcpy(g_comment, "cmps"); |
5251 | } |
5252 | pfomask &= ~(1 << PFO_Z); |
5253 | last_arith_dst = NULL; |
5254 | delayed_flag_op = NULL; |
5255 | break; |
5256 | |
591721d7 |
5257 | case OP_SCAS: |
5258 | // only does ZF (for now) |
5259 | // repe ~ repeat while ZF=1 |
5260 | assert_operand_cnt(3); |
5261 | j = lmod_bytes(po, po->operand[0].lmod); |
5262 | l = (po->flags & OPF_DF) ? '-' : '+'; |
5263 | if (po->flags & OPF_REP) { |
5264 | fprintf(fout, |
1f84f6b3 |
5265 | " for (; ecx != 0; ecx--) {\n"); |
591721d7 |
5266 | fprintf(fout, |
1f84f6b3 |
5267 | " cond_z = (%seax == %sedi); edi %c= %d;\n", |
591721d7 |
5268 | lmod_cast_u(po, po->operand[0].lmod), |
1f84f6b3 |
5269 | lmod_cast_u_ptr(po, po->operand[0].lmod), l, j); |
5270 | fprintf(fout, |
5271 | " if (cond_z %s 0) break;\n", |
591721d7 |
5272 | (po->flags & OPF_REPZ) ? "==" : "!="); |
5273 | fprintf(fout, |
1f84f6b3 |
5274 | " }"); |
591721d7 |
5275 | snprintf(g_comment, sizeof(g_comment), "rep%s scas", |
5276 | (po->flags & OPF_REPZ) ? "e" : "ne"); |
5277 | } |
5278 | else { |
05381e4a |
5279 | fprintf(fout, " cond_z = (%seax == %sedi); edi %c= %d;", |
591721d7 |
5280 | lmod_cast_u(po, po->operand[0].lmod), |
5281 | lmod_cast_u_ptr(po, po->operand[0].lmod), l, j); |
5282 | strcpy(g_comment, "scas"); |
5283 | } |
5284 | pfomask &= ~(1 << PFO_Z); |
5285 | last_arith_dst = NULL; |
5286 | delayed_flag_op = NULL; |
5287 | break; |
5288 | |
850c9265 |
5289 | // arithmetic w/flags |
850c9265 |
5290 | case OP_AND: |
2b70f6d3 |
5291 | if (po->operand[1].type == OPT_CONST && !po->operand[1].val) |
5292 | goto dualop_arith_const; |
5293 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
5294 | goto dualop_arith; |
5295 | |
850c9265 |
5296 | case OP_OR: |
5101a5f9 |
5297 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
2b70f6d3 |
5298 | if (po->operand[1].type == OPT_CONST) { |
5299 | j = lmod_bytes(po, po->operand[0].lmod); |
5300 | if (((1ull << j * 8) - 1) == po->operand[1].val) |
5301 | goto dualop_arith_const; |
5302 | } |
5303 | goto dualop_arith; |
5304 | |
850c9265 |
5305 | dualop_arith: |
5306 | assert_operand_cnt(2); |
850c9265 |
5307 | fprintf(fout, " %s %s= %s;", |
5308 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
5309 | op_to_c(po), |
3ebea2cf |
5310 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
04f8a628 |
5311 | output_std_flags(fout, po, &pfomask, buf1); |
5312 | last_arith_dst = &po->operand[0]; |
5313 | delayed_flag_op = NULL; |
5314 | break; |
5315 | |
2b70f6d3 |
5316 | dualop_arith_const: |
5317 | // and 0, or ~0 used instead mov |
5318 | assert_operand_cnt(2); |
5319 | fprintf(fout, " %s = %s;", |
5320 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
5321 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
5322 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0)); |
5323 | output_std_flags(fout, po, &pfomask, buf1); |
5324 | last_arith_dst = &po->operand[0]; |
5325 | delayed_flag_op = NULL; |
5326 | break; |
5327 | |
04f8a628 |
5328 | case OP_SHL: |
5329 | case OP_SHR: |
5330 | assert_operand_cnt(2); |
5331 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
5332 | if (pfomask & (1 << PFO_C)) { |
5333 | if (po->operand[1].type == OPT_CONST) { |
5334 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
5335 | j = po->operand[1].val; |
5336 | j %= l; |
5337 | if (j != 0) { |
5338 | if (po->op == OP_SHL) |
5339 | j = l - j; |
5340 | else |
5341 | j -= 1; |
cb090db0 |
5342 | fprintf(fout, " cond_c = (%s >> %d) & 1;\n", |
5343 | buf1, j); |
04f8a628 |
5344 | } |
5345 | else |
5346 | ferr(po, "zero shift?\n"); |
5347 | } |
5348 | else |
5349 | ferr(po, "TODO\n"); |
5350 | pfomask &= ~(1 << PFO_C); |
840257f6 |
5351 | } |
04abc5d6 |
5352 | fprintf(fout, " %s %s= %s", buf1, op_to_c(po), |
04f8a628 |
5353 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
04abc5d6 |
5354 | if (po->operand[1].type != OPT_CONST) |
5355 | fprintf(fout, " & 0x1f"); |
5356 | fprintf(fout, ";"); |
04f8a628 |
5357 | output_std_flags(fout, po, &pfomask, buf1); |
850c9265 |
5358 | last_arith_dst = &po->operand[0]; |
69a3cdfc |
5359 | delayed_flag_op = NULL; |
850c9265 |
5360 | break; |
5361 | |
d4e3b5db |
5362 | case OP_SAR: |
5363 | assert_operand_cnt(2); |
5364 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
5365 | fprintf(fout, " %s = %s%s >> %s;", buf1, |
5366 | lmod_cast_s(po, po->operand[0].lmod), buf1, |
3ebea2cf |
5367 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
04f8a628 |
5368 | output_std_flags(fout, po, &pfomask, buf1); |
d4e3b5db |
5369 | last_arith_dst = &po->operand[0]; |
5370 | delayed_flag_op = NULL; |
5371 | break; |
5372 | |
04abc5d6 |
5373 | case OP_SHLD: |
3b2f4044 |
5374 | case OP_SHRD: |
5375 | assert_operand_cnt(3); |
5376 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
5377 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
5378 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
5379 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
5380 | out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[2]); |
04abc5d6 |
5381 | if (po->operand[2].type != OPT_CONST) |
5382 | ferr(po, "TODO: masking\n"); |
5383 | if (po->op == OP_SHLD) { |
5384 | fprintf(fout, " %s <<= %s; %s |= %s >> (%d - %s);", |
5385 | buf1, buf3, buf1, buf2, l, buf3); |
5386 | strcpy(g_comment, "shld"); |
5387 | } |
5388 | else { |
5389 | fprintf(fout, " %s >>= %s; %s |= %s << (%d - %s);", |
5390 | buf1, buf3, buf1, buf2, l, buf3); |
5391 | strcpy(g_comment, "shrd"); |
5392 | } |
3b2f4044 |
5393 | output_std_flags(fout, po, &pfomask, buf1); |
5394 | last_arith_dst = &po->operand[0]; |
5395 | delayed_flag_op = NULL; |
5396 | break; |
5397 | |
d4e3b5db |
5398 | case OP_ROL: |
5399 | case OP_ROR: |
5400 | assert_operand_cnt(2); |
5401 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
5402 | if (po->operand[1].type == OPT_CONST) { |
5403 | j = po->operand[1].val; |
5404 | j %= lmod_bytes(po, po->operand[0].lmod) * 8; |
5405 | fprintf(fout, po->op == OP_ROL ? |
5406 | " %s = (%s << %d) | (%s >> %d);" : |
5407 | " %s = (%s >> %d) | (%s << %d);", |
5408 | buf1, buf1, j, buf1, |
5409 | lmod_bytes(po, po->operand[0].lmod) * 8 - j); |
5410 | } |
5411 | else |
5412 | ferr(po, "TODO\n"); |
04f8a628 |
5413 | output_std_flags(fout, po, &pfomask, buf1); |
d4e3b5db |
5414 | last_arith_dst = &po->operand[0]; |
5415 | delayed_flag_op = NULL; |
5416 | break; |
5417 | |
cb090db0 |
5418 | case OP_RCL: |
5419 | case OP_RCR: |
5420 | assert_operand_cnt(2); |
5421 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
5422 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
5423 | if (po->operand[1].type == OPT_CONST) { |
5424 | j = po->operand[1].val % l; |
5425 | if (j == 0) |
5426 | ferr(po, "zero rotate\n"); |
5427 | fprintf(fout, " tmp = (%s >> %d) & 1;\n", |
5428 | buf1, (po->op == OP_RCL) ? (l - j) : (j - 1)); |
5429 | if (po->op == OP_RCL) { |
5430 | fprintf(fout, |
5431 | " %s = (%s << %d) | (cond_c << %d)", |
5432 | buf1, buf1, j, j - 1); |
5433 | if (j != 1) |
5434 | fprintf(fout, " | (%s >> %d)", buf1, l + 1 - j); |
5435 | } |
5436 | else { |
5437 | fprintf(fout, |
5438 | " %s = (%s >> %d) | (cond_c << %d)", |
5439 | buf1, buf1, j, l - j); |
5440 | if (j != 1) |
5441 | fprintf(fout, " | (%s << %d)", buf1, l + 1 - j); |
5442 | } |
5443 | fprintf(fout, ";\n"); |
5444 | fprintf(fout, " cond_c = tmp;"); |
5445 | } |
5446 | else |
5447 | ferr(po, "TODO\n"); |
5448 | strcpy(g_comment, (po->op == OP_RCL) ? "rcl" : "rcr"); |
5449 | output_std_flags(fout, po, &pfomask, buf1); |
5450 | last_arith_dst = &po->operand[0]; |
5451 | delayed_flag_op = NULL; |
5452 | break; |
5453 | |
5101a5f9 |
5454 | case OP_XOR: |
850c9265 |
5455 | assert_operand_cnt(2); |
5456 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
5101a5f9 |
5457 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
5458 | // special case for XOR |
2fe80fdb |
5459 | if (pfomask & (1 << PFO_BE)) { // weird, but it happens.. |
5460 | fprintf(fout, " cond_be = 1;\n"); |
5461 | pfomask &= ~(1 << PFO_BE); |
5462 | } |
5101a5f9 |
5463 | fprintf(fout, " %s = 0;", |
5464 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
5465 | last_arith_dst = &po->operand[0]; |
5466 | delayed_flag_op = NULL; |
850c9265 |
5467 | break; |
850c9265 |
5468 | } |
5101a5f9 |
5469 | goto dualop_arith; |
5470 | |
2fe80fdb |
5471 | case OP_ADD: |
5472 | assert_operand_cnt(2); |
5473 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
5474 | if (pfomask & (1 << PFO_C)) { |
c8dbc5be |
5475 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
5476 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
5477 | if (po->operand[0].lmod == OPLM_DWORD) { |
5478 | fprintf(fout, " tmp64 = (u64)%s + %s;\n", buf1, buf2); |
5479 | fprintf(fout, " cond_c = tmp64 >> 32;\n"); |
5480 | fprintf(fout, " %s = (u32)tmp64;", |
5481 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
5482 | strcat(g_comment, "add64"); |
5483 | } |
5484 | else { |
5485 | fprintf(fout, " cond_c = ((u32)%s + %s) >> %d;\n", |
5486 | buf1, buf2, lmod_bytes(po, po->operand[0].lmod) * 8); |
5487 | fprintf(fout, " %s += %s;", |
5488 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
5489 | buf2); |
5490 | } |
2fe80fdb |
5491 | pfomask &= ~(1 << PFO_C); |
5492 | output_std_flags(fout, po, &pfomask, buf1); |
5493 | last_arith_dst = &po->operand[0]; |
5494 | delayed_flag_op = NULL; |
5495 | break; |
5496 | } |
5497 | goto dualop_arith; |
5498 | |
5499 | case OP_SUB: |
5500 | assert_operand_cnt(2); |
5501 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
3b2f4044 |
5502 | if (pfomask & ~((1 << PFO_Z) | (1 << PFO_S))) { |
5503 | for (j = 0; j <= PFO_LE; j++) { |
5504 | if (!(pfomask & (1 << j))) |
5505 | continue; |
5506 | if (j == PFO_Z || j == PFO_S) |
5507 | continue; |
5508 | |
5509 | out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0); |
5510 | fprintf(fout, " cond_%s = %s;\n", |
5511 | parsed_flag_op_names[j], buf1); |
5512 | pfomask &= ~(1 << j); |
5513 | } |
2fe80fdb |
5514 | } |
5515 | goto dualop_arith; |
5516 | |
5101a5f9 |
5517 | case OP_ADC: |
850c9265 |
5518 | case OP_SBB: |
5101a5f9 |
5519 | assert_operand_cnt(2); |
5520 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
a2c1d768 |
5521 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
840257f6 |
5522 | if (po->op == OP_SBB |
5523 | && IS(po->operand[0].name, po->operand[1].name)) |
5524 | { |
5525 | // avoid use of unitialized var |
a2c1d768 |
5526 | fprintf(fout, " %s = -cond_c;", buf1); |
94d447fb |
5527 | // carry remains what it was |
5528 | pfomask &= ~(1 << PFO_C); |
840257f6 |
5529 | } |
5530 | else { |
a2c1d768 |
5531 | fprintf(fout, " %s %s= %s + cond_c;", buf1, op_to_c(po), |
3ebea2cf |
5532 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
840257f6 |
5533 | } |
a2c1d768 |
5534 | output_std_flags(fout, po, &pfomask, buf1); |
5101a5f9 |
5535 | last_arith_dst = &po->operand[0]; |
5536 | delayed_flag_op = NULL; |
850c9265 |
5537 | break; |
5538 | |
1f84f6b3 |
5539 | case OP_BSF: |
5540 | assert_operand_cnt(2); |
5541 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
5542 | fprintf(fout, " %s = %s ? __builtin_ffs(%s) - 1 : 0;", |
5543 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
5544 | buf2, buf2); |
5545 | output_std_flags(fout, po, &pfomask, buf1); |
5546 | last_arith_dst = &po->operand[0]; |
5547 | delayed_flag_op = NULL; |
5548 | strcat(g_comment, "bsf"); |
5549 | break; |
5550 | |
850c9265 |
5551 | case OP_DEC: |
90307a99 |
5552 | if (pfomask & ~(PFOB_S | PFOB_S | PFOB_C)) { |
5553 | for (j = 0; j <= PFO_LE; j++) { |
5554 | if (!(pfomask & (1 << j))) |
5555 | continue; |
5556 | if (j == PFO_Z || j == PFO_S || j == PFO_C) |
5557 | continue; |
5558 | |
5559 | out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0); |
5560 | fprintf(fout, " cond_%s = %s;\n", |
5561 | parsed_flag_op_names[j], buf1); |
5562 | pfomask &= ~(1 << j); |
5563 | } |
5564 | } |
5565 | // fallthrough |
5566 | |
5567 | case OP_INC: |
5568 | if (pfomask & (1 << PFO_C)) |
5569 | // carry is unaffected by inc/dec.. wtf? |
5570 | ferr(po, "carry propagation needed\n"); |
5571 | |
850c9265 |
5572 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
1bafb621 |
5573 | if (po->operand[0].type == OPT_REG) { |
5574 | strcpy(buf2, po->op == OP_INC ? "++" : "--"); |
5575 | fprintf(fout, " %s%s;", buf1, buf2); |
5576 | } |
5577 | else { |
5578 | strcpy(buf2, po->op == OP_INC ? "+" : "-"); |
5579 | fprintf(fout, " %s %s= 1;", buf1, buf2); |
5580 | } |
a2c1d768 |
5581 | output_std_flags(fout, po, &pfomask, buf1); |
5101a5f9 |
5582 | last_arith_dst = &po->operand[0]; |
5583 | delayed_flag_op = NULL; |
5584 | break; |
5585 | |
5586 | case OP_NEG: |
5587 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
3ebea2cf |
5588 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]); |
5101a5f9 |
5589 | fprintf(fout, " %s = -%s%s;", buf1, |
5590 | lmod_cast_s(po, po->operand[0].lmod), buf2); |
850c9265 |
5591 | last_arith_dst = &po->operand[0]; |
69a3cdfc |
5592 | delayed_flag_op = NULL; |
940e8e66 |
5593 | if (pfomask & (1 << PFO_C)) { |
5594 | fprintf(fout, "\n cond_c = (%s != 0);", buf1); |
5595 | pfomask &= ~(1 << PFO_C); |
5596 | } |
850c9265 |
5597 | break; |
5598 | |
5599 | case OP_IMUL: |
de50b98b |
5600 | if (po->operand_cnt == 2) { |
5601 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
850c9265 |
5602 | goto dualop_arith; |
de50b98b |
5603 | } |
87bf6cec |
5604 | if (po->operand_cnt == 3) |
5605 | ferr(po, "TODO imul3\n"); |
5606 | // fallthrough |
5607 | case OP_MUL: |
5608 | assert_operand_cnt(1); |
c8dbc5be |
5609 | switch (po->operand[0].lmod) { |
5610 | case OPLM_DWORD: |
5611 | strcpy(buf1, po->op == OP_IMUL ? "(s64)(s32)" : "(u64)"); |
5612 | fprintf(fout, " tmp64 = %seax * %s%s;\n", buf1, buf1, |
5613 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0])); |
5614 | fprintf(fout, " edx = tmp64 >> 32;\n"); |
5615 | fprintf(fout, " eax = tmp64;"); |
5616 | break; |
5617 | case OPLM_BYTE: |
5618 | strcpy(buf1, po->op == OP_IMUL ? "(s16)(s8)" : "(u16)(u8)"); |
5619 | fprintf(fout, " LOWORD(eax) = %seax * %s;", buf1, |
5620 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[0], |
5621 | buf1, 0)); |
5622 | break; |
5623 | default: |
5624 | ferr(po, "TODO: unhandled mul type\n"); |
5625 | break; |
5626 | } |
87bf6cec |
5627 | last_arith_dst = NULL; |
69a3cdfc |
5628 | delayed_flag_op = NULL; |
91977a1c |
5629 | break; |
5630 | |
5101a5f9 |
5631 | case OP_DIV: |
5632 | case OP_IDIV: |
5633 | assert_operand_cnt(1); |
5634 | if (po->operand[0].lmod != OPLM_DWORD) |
5635 | ferr(po, "unhandled lmod %d\n", po->operand[0].lmod); |
5636 | |
cb090db0 |
5637 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
5638 | strcpy(buf2, lmod_cast(po, po->operand[0].lmod, |
5639 | po->op == OP_IDIV)); |
5640 | switch (po->operand[0].lmod) { |
5641 | case OPLM_DWORD: |
5642 | if (po->flags & OPF_32BIT) |
5643 | snprintf(buf3, sizeof(buf3), "%seax", buf2); |
5644 | else { |
5645 | fprintf(fout, " tmp64 = ((u64)edx << 32) | eax;\n"); |
5646 | snprintf(buf3, sizeof(buf3), "%stmp64", |
5647 | (po->op == OP_IDIV) ? "(s64)" : ""); |
5648 | } |
5649 | if (po->operand[0].type == OPT_REG |
5650 | && po->operand[0].reg == xDX) |
5651 | { |
5652 | fprintf(fout, " eax = %s / %s%s;", buf3, buf2, buf1); |
5653 | fprintf(fout, " edx = %s %% %s%s;\n", buf3, buf2, buf1); |
5654 | } |
5655 | else { |
5656 | fprintf(fout, " edx = %s %% %s%s;\n", buf3, buf2, buf1); |
5657 | fprintf(fout, " eax = %s / %s%s;", buf3, buf2, buf1); |
5658 | } |
5659 | break; |
5660 | default: |
5661 | ferr(po, "unhandled division type\n"); |
5101a5f9 |
5662 | } |
87bf6cec |
5663 | last_arith_dst = NULL; |
5664 | delayed_flag_op = NULL; |
5101a5f9 |
5665 | break; |
5666 | |
91977a1c |
5667 | case OP_TEST: |
5668 | case OP_CMP: |
850c9265 |
5669 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
940e8e66 |
5670 | if (pfomask != 0) { |
69a3cdfc |
5671 | for (j = 0; j < 8; j++) { |
940e8e66 |
5672 | if (pfomask & (1 << j)) { |
69a3cdfc |
5673 | out_cmp_test(buf1, sizeof(buf1), po, j, 0); |
5674 | fprintf(fout, " cond_%s = %s;", |
5675 | parsed_flag_op_names[j], buf1); |
5676 | } |
5677 | } |
940e8e66 |
5678 | pfomask = 0; |
69a3cdfc |
5679 | } |
5680 | else |
5681 | no_output = 1; |
7ba45c34 |
5682 | last_arith_dst = NULL; |
69a3cdfc |
5683 | delayed_flag_op = po; |
91977a1c |
5684 | break; |
5685 | |
092f64e1 |
5686 | case OP_SCC: |
5687 | // SETcc - should already be handled |
5688 | break; |
5689 | |
69a3cdfc |
5690 | // note: we reuse OP_Jcc for SETcc, only flags differ |
092f64e1 |
5691 | case OP_JCC: |
5692 | fprintf(fout, "\n goto %s;", po->operand[0].name); |
850c9265 |
5693 | break; |
5694 | |
5c024ef7 |
5695 | case OP_JECXZ: |
5696 | fprintf(fout, " if (ecx == 0)\n"); |
5697 | fprintf(fout, " goto %s;", po->operand[0].name); |
5698 | strcat(g_comment, "jecxz"); |
5699 | break; |
5700 | |
04abc5d6 |
5701 | case OP_LOOP: |
5702 | fprintf(fout, " if (--ecx == 0)\n"); |
5703 | fprintf(fout, " goto %s;", po->operand[0].name); |
5704 | strcat(g_comment, "loop"); |
5705 | break; |
5706 | |
850c9265 |
5707 | case OP_JMP: |
87bf6cec |
5708 | assert_operand_cnt(1); |
de50b98b |
5709 | last_arith_dst = NULL; |
5710 | delayed_flag_op = NULL; |
5711 | |
4c45fa73 |
5712 | if (po->operand[0].type == OPT_REGMEM) { |
5713 | ret = sscanf(po->operand[0].name, "%[^[][%[^*]*4]", |
5714 | buf1, buf2); |
5715 | if (ret != 2) |
5716 | ferr(po, "parse failure for jmp '%s'\n", |
5717 | po->operand[0].name); |
5718 | fprintf(fout, " goto *jt_%s[%s];", buf1, buf2); |
5719 | break; |
5720 | } |
5721 | else if (po->operand[0].type != OPT_LABEL) |
5722 | ferr(po, "unhandled jmp type\n"); |
87bf6cec |
5723 | |
850c9265 |
5724 | fprintf(fout, " goto %s;", po->operand[0].name); |
91977a1c |
5725 | break; |
5726 | |
5727 | case OP_CALL: |
5101a5f9 |
5728 | assert_operand_cnt(1); |
092f64e1 |
5729 | pp = po->pp; |
89ff3147 |
5730 | my_assert_not(pp, NULL); |
91977a1c |
5731 | |
092f64e1 |
5732 | strcpy(buf3, " "); |
5733 | if (po->flags & OPF_CC) { |
5734 | // we treat conditional branch to another func |
5735 | // (yes such code exists..) as conditional tailcall |
5736 | strcat(buf3, " "); |
5737 | fprintf(fout, " {\n"); |
5738 | } |
5739 | |
8eb12e72 |
5740 | if (pp->is_fptr && !pp->is_arg) { |
092f64e1 |
5741 | fprintf(fout, "%s%s = %s;\n", buf3, pp->name, |
1cd4a663 |
5742 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], |
5743 | "(void *)", 0)); |
8eb12e72 |
5744 | if (pp->is_unresolved) |
5745 | fprintf(fout, "%sunresolved_call(\"%s:%d\", %s);\n", |
5746 | buf3, asmfn, po->asmln, pp->name); |
5747 | } |
1bafb621 |
5748 | |
092f64e1 |
5749 | fprintf(fout, "%s", buf3); |
2b43685d |
5750 | if (strstr(pp->ret_type.name, "int64")) { |
87bf6cec |
5751 | if (po->flags & OPF_TAIL) |
2b43685d |
5752 | ferr(po, "int64 and tail?\n"); |
2fe80fdb |
5753 | fprintf(fout, "tmp64 = "); |
2b43685d |
5754 | } |
5755 | else if (!IS(pp->ret_type.name, "void")) { |
5756 | if (po->flags & OPF_TAIL) { |
840257f6 |
5757 | if (!IS(g_func_pp->ret_type.name, "void")) { |
5758 | fprintf(fout, "return "); |
5759 | if (g_func_pp->ret_type.is_ptr != pp->ret_type.is_ptr) |
5760 | fprintf(fout, "(%s)", g_func_pp->ret_type.name); |
5761 | } |
2b43685d |
5762 | } |
75ad0378 |
5763 | else if (regmask & (1 << xAX)) { |
87bf6cec |
5764 | fprintf(fout, "eax = "); |
2b43685d |
5765 | if (pp->ret_type.is_ptr) |
5766 | fprintf(fout, "(u32)"); |
5767 | } |
91977a1c |
5768 | } |
87bf6cec |
5769 | |
ddaf8bd7 |
5770 | if (pp->name[0] == 0) |
5771 | ferr(po, "missing pp->name\n"); |
5772 | fprintf(fout, "%s%s(", pp->name, |
5773 | pp->has_structarg ? "_sa" : ""); |
39b168b8 |
5774 | |
2fe80fdb |
5775 | if (po->flags & OPF_ATAIL) { |
5776 | if (pp->argc_stack != g_func_pp->argc_stack |
5777 | || (pp->argc_stack > 0 |
5778 | && pp->is_stdcall != g_func_pp->is_stdcall)) |
5779 | ferr(po, "incompatible tailcall\n"); |
1f84f6b3 |
5780 | if (g_func_pp->has_retreg) |
5781 | ferr(po, "TODO: retreg+tailcall\n"); |
87bf6cec |
5782 | |
2fe80fdb |
5783 | for (arg = j = 0; arg < pp->argc; arg++) { |
5784 | if (arg > 0) |
5785 | fprintf(fout, ", "); |
87bf6cec |
5786 | |
2fe80fdb |
5787 | cast[0] = 0; |
5788 | if (pp->arg[arg].type.is_ptr) |
5789 | snprintf(cast, sizeof(cast), "(%s)", |
5790 | pp->arg[arg].type.name); |
91977a1c |
5791 | |
2fe80fdb |
5792 | if (pp->arg[arg].reg != NULL) { |
5793 | fprintf(fout, "%s%s", cast, pp->arg[arg].reg); |
5794 | continue; |
5795 | } |
5796 | // stack arg |
5797 | for (; j < g_func_pp->argc; j++) |
5798 | if (g_func_pp->arg[j].reg == NULL) |
5799 | break; |
5800 | fprintf(fout, "%sa%d", cast, j + 1); |
5801 | j++; |
69a3cdfc |
5802 | } |
2fe80fdb |
5803 | } |
5804 | else { |
5805 | for (arg = 0; arg < pp->argc; arg++) { |
5806 | if (arg > 0) |
5807 | fprintf(fout, ", "); |
5808 | |
5809 | cast[0] = 0; |
5810 | if (pp->arg[arg].type.is_ptr) |
5811 | snprintf(cast, sizeof(cast), "(%s)", |
5812 | pp->arg[arg].type.name); |
5813 | |
5814 | if (pp->arg[arg].reg != NULL) { |
1f84f6b3 |
5815 | if (pp->arg[arg].type.is_retreg) |
5816 | fprintf(fout, "&%s", pp->arg[arg].reg); |
5817 | else |
5818 | fprintf(fout, "%s%s", cast, pp->arg[arg].reg); |
2fe80fdb |
5819 | continue; |
5820 | } |
5821 | |
5822 | // stack arg |
5823 | tmp_op = pp->arg[arg].datap; |
5824 | if (tmp_op == NULL) |
5825 | ferr(po, "parsed_op missing for arg%d\n", arg); |
23fd0b11 |
5826 | |
5827 | if (tmp_op->flags & OPF_VAPUSH) { |
5828 | fprintf(fout, "ap"); |
5829 | } |
5f70a34f |
5830 | else if (tmp_op->p_argpass != 0) { |
5831 | fprintf(fout, "a%d", tmp_op->p_argpass); |
5832 | } |
5833 | else if (tmp_op->p_argnum != 0) { |
3a5101d7 |
5834 | fprintf(fout, "%s%s", cast, |
5835 | saved_arg_name(buf1, sizeof(buf1), |
5836 | tmp_op->p_arggrp, tmp_op->p_argnum)); |
2fe80fdb |
5837 | } |
5838 | else { |
5839 | fprintf(fout, "%s", |
5840 | out_src_opr(buf1, sizeof(buf1), |
5841 | tmp_op, &tmp_op->operand[0], cast, 0)); |
5842 | } |
69a3cdfc |
5843 | } |
91977a1c |
5844 | } |
5845 | fprintf(fout, ");"); |
87bf6cec |
5846 | |
2b43685d |
5847 | if (strstr(pp->ret_type.name, "int64")) { |
5848 | fprintf(fout, "\n"); |
092f64e1 |
5849 | fprintf(fout, "%sedx = tmp64 >> 32;\n", buf3); |
5850 | fprintf(fout, "%seax = tmp64;", buf3); |
2b43685d |
5851 | } |
5852 | |
89ff3147 |
5853 | if (pp->is_unresolved) { |
8eb12e72 |
5854 | snprintf(buf2, sizeof(buf2), " unresolved %dreg", |
89ff3147 |
5855 | pp->argc_reg); |
092f64e1 |
5856 | strcat(g_comment, buf2); |
89ff3147 |
5857 | } |
5858 | |
87bf6cec |
5859 | if (po->flags & OPF_TAIL) { |
840257f6 |
5860 | ret = 0; |
ddaf8bd7 |
5861 | if (i == opcnt - 1 || pp->is_noreturn) |
840257f6 |
5862 | ret = 0; |
5863 | else if (IS(pp->ret_type.name, "void")) |
5864 | ret = 1; |
5865 | else if (IS(g_func_pp->ret_type.name, "void")) |
5866 | ret = 1; |
5867 | // else already handled as 'return f()' |
5868 | |
5869 | if (ret) { |
da87ae38 |
5870 | if (!IS(g_func_pp->ret_type.name, "void")) { |
ddaf8bd7 |
5871 | ferr(po, "int func -> void func tailcall?\n"); |
da87ae38 |
5872 | } |
5873 | else { |
092f64e1 |
5874 | fprintf(fout, "\n%sreturn;", buf3); |
ddaf8bd7 |
5875 | strcat(g_comment, " ^ tailcall"); |
da87ae38 |
5876 | } |
3ebea2cf |
5877 | } |
89ff3147 |
5878 | else |
ddaf8bd7 |
5879 | strcat(g_comment, " tailcall"); |
87bf6cec |
5880 | } |
ddaf8bd7 |
5881 | if (pp->is_noreturn) |
5882 | strcat(g_comment, " noreturn"); |
2fe80fdb |
5883 | if ((po->flags & OPF_ATAIL) && pp->argc_stack > 0) |
5884 | strcat(g_comment, " argframe"); |
092f64e1 |
5885 | if (po->flags & OPF_CC) |
5886 | strcat(g_comment, " cond"); |
5887 | |
5888 | if (po->flags & OPF_CC) |
5889 | fprintf(fout, "\n }"); |
5890 | |
87bf6cec |
5891 | delayed_flag_op = NULL; |
5892 | last_arith_dst = NULL; |
91977a1c |
5893 | break; |
5894 | |
5895 | case OP_RET: |
bd96f656 |
5896 | if (g_func_pp->is_vararg) |
4f12f671 |
5897 | fprintf(fout, " va_end(ap);\n"); |
1f84f6b3 |
5898 | if (g_func_pp->has_retreg) { |
5899 | for (arg = 0; arg < g_func_pp->argc; arg++) |
5900 | if (g_func_pp->arg[arg].type.is_retreg) |
5901 | fprintf(fout, " *r_%s = %s;\n", |
5902 | g_func_pp->arg[arg].reg, g_func_pp->arg[arg].reg); |
5903 | } |
4f12f671 |
5904 | |
bd96f656 |
5905 | if (IS(g_func_pp->ret_type.name, "void")) { |
3ebea2cf |
5906 | if (i != opcnt - 1 || label_pending) |
5907 | fprintf(fout, " return;"); |
5908 | } |
bd96f656 |
5909 | else if (g_func_pp->ret_type.is_ptr) { |
d4e3b5db |
5910 | fprintf(fout, " return (%s)eax;", |
bd96f656 |
5911 | g_func_pp->ret_type.name); |
3ebea2cf |
5912 | } |
2fe80fdb |
5913 | else if (IS(g_func_pp->ret_type.name, "__int64")) |
5914 | fprintf(fout, " return ((u64)edx << 32) | eax;"); |
91977a1c |
5915 | else |
5916 | fprintf(fout, " return eax;"); |
de50b98b |
5917 | |
5918 | last_arith_dst = NULL; |
5919 | delayed_flag_op = NULL; |
91977a1c |
5920 | break; |
5921 | |
5922 | case OP_PUSH: |
1f84f6b3 |
5923 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
5f70a34f |
5924 | if (po->p_argnum != 0) { |
69a3cdfc |
5925 | // special case - saved func arg |
3a5101d7 |
5926 | fprintf(fout, " %s = %s;", |
5927 | saved_arg_name(buf2, sizeof(buf2), |
5928 | po->p_arggrp, po->p_argnum), buf1); |
69a3cdfc |
5929 | break; |
5930 | } |
d4e3b5db |
5931 | else if (po->flags & OPF_RSAVE) { |
d4e3b5db |
5932 | fprintf(fout, " s_%s = %s;", buf1, buf1); |
5933 | break; |
5934 | } |
25a330eb |
5935 | else if (po->flags & OPF_PPUSH) { |
5936 | tmp_op = po->datap; |
5937 | ferr_assert(po, tmp_op != NULL); |
5938 | out_dst_opr(buf2, sizeof(buf2), po, &tmp_op->operand[0]); |
5939 | fprintf(fout, " pp_%s = %s;", buf2, buf1); |
5940 | break; |
5941 | } |
1f84f6b3 |
5942 | else if (g_func_pp->is_userstack) { |
5943 | fprintf(fout, " *(--esp) = %s;", buf1); |
5944 | break; |
5945 | } |
e56ab892 |
5946 | if (!(g_ida_func_attr & IDAFA_NORETURN)) |
5947 | ferr(po, "stray push encountered\n"); |
5948 | no_output = 1; |
91977a1c |
5949 | break; |
5950 | |
5951 | case OP_POP: |
25a330eb |
5952 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
d4e3b5db |
5953 | if (po->flags & OPF_RSAVE) { |
d4e3b5db |
5954 | fprintf(fout, " %s = s_%s;", buf1, buf1); |
5955 | break; |
5956 | } |
25a330eb |
5957 | else if (po->flags & OPF_PPUSH) { |
e83ea7ed |
5958 | // push/pop graph / non-const |
25a330eb |
5959 | ferr_assert(po, po->datap == NULL); |
5960 | fprintf(fout, " %s = pp_%s;", buf1, buf1); |
5961 | break; |
5962 | } |
5c024ef7 |
5963 | else if (po->datap != NULL) { |
5964 | // push/pop pair |
5965 | tmp_op = po->datap; |
5c024ef7 |
5966 | fprintf(fout, " %s = %s;", buf1, |
5967 | out_src_opr(buf2, sizeof(buf2), |
5968 | tmp_op, &tmp_op->operand[0], |
c7ed83dd |
5969 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0)); |
5c024ef7 |
5970 | break; |
5971 | } |
1f84f6b3 |
5972 | else if (g_func_pp->is_userstack) { |
25a330eb |
5973 | fprintf(fout, " %s = *esp++;", buf1); |
1f84f6b3 |
5974 | break; |
5975 | } |
5976 | else |
5977 | ferr(po, "stray pop encountered\n"); |
91977a1c |
5978 | break; |
5979 | |
33c35af6 |
5980 | case OP_NOP: |
2b43685d |
5981 | no_output = 1; |
33c35af6 |
5982 | break; |
5983 | |
90307a99 |
5984 | // mmx |
5985 | case OP_EMMS: |
5986 | strcpy(g_comment, "(emms)"); |
5987 | break; |
5988 | |
91977a1c |
5989 | default: |
5990 | no_output = 1; |
69a3cdfc |
5991 | ferr(po, "unhandled op type %d, flags %x\n", |
5992 | po->op, po->flags); |
91977a1c |
5993 | break; |
5994 | } |
5995 | |
5996 | if (g_comment[0] != 0) { |
ddaf8bd7 |
5997 | char *p = g_comment; |
5998 | while (my_isblank(*p)) |
5999 | p++; |
6000 | fprintf(fout, " // %s", p); |
91977a1c |
6001 | g_comment[0] = 0; |
6002 | no_output = 0; |
6003 | } |
6004 | if (!no_output) |
6005 | fprintf(fout, "\n"); |
5101a5f9 |
6006 | |
2b43685d |
6007 | // some sanity checking |
591721d7 |
6008 | if (po->flags & OPF_REP) { |
6009 | if (po->op != OP_STOS && po->op != OP_MOVS |
6010 | && po->op != OP_CMPS && po->op != OP_SCAS) |
6011 | ferr(po, "unexpected rep\n"); |
6012 | if (!(po->flags & (OPF_REPZ|OPF_REPNZ)) |
6013 | && (po->op == OP_CMPS || po->op == OP_SCAS)) |
6014 | ferr(po, "cmps/scas with plain rep\n"); |
6015 | } |
6016 | if ((po->flags & (OPF_REPZ|OPF_REPNZ)) |
6017 | && po->op != OP_CMPS && po->op != OP_SCAS) |
2b43685d |
6018 | ferr(po, "unexpected repz/repnz\n"); |
6019 | |
940e8e66 |
6020 | if (pfomask != 0) |
7ba45c34 |
6021 | ferr(po, "missed flag calc, pfomask=%x\n", pfomask); |
940e8e66 |
6022 | |
5101a5f9 |
6023 | // see is delayed flag stuff is still valid |
6024 | if (delayed_flag_op != NULL && delayed_flag_op != po) { |
89ff3147 |
6025 | if (is_any_opr_modified(delayed_flag_op, po, 0)) |
5101a5f9 |
6026 | delayed_flag_op = NULL; |
6027 | } |
6028 | |
6029 | if (last_arith_dst != NULL && last_arith_dst != &po->operand[0]) { |
6030 | if (is_opr_modified(last_arith_dst, po)) |
6031 | last_arith_dst = NULL; |
6032 | } |
3ebea2cf |
6033 | |
6034 | label_pending = 0; |
91977a1c |
6035 | } |
6036 | |
a2c1d768 |
6037 | if (g_stack_fsz && !g_stack_frame_used) |
6038 | fprintf(fout, " (void)sf;\n"); |
6039 | |
91977a1c |
6040 | fprintf(fout, "}\n\n"); |
6041 | |
9af2d373 |
6042 | gen_x_cleanup(opcnt); |
6043 | } |
6044 | |
6045 | static void gen_x_cleanup(int opcnt) |
6046 | { |
6047 | int i; |
6048 | |
91977a1c |
6049 | for (i = 0; i < opcnt; i++) { |
4c45fa73 |
6050 | struct label_ref *lr, *lr_del; |
6051 | |
6052 | lr = g_label_refs[i].next; |
6053 | while (lr != NULL) { |
6054 | lr_del = lr; |
6055 | lr = lr->next; |
6056 | free(lr_del); |
6057 | } |
6058 | g_label_refs[i].i = -1; |
6059 | g_label_refs[i].next = NULL; |
6060 | |
91977a1c |
6061 | if (ops[i].op == OP_CALL) { |
092f64e1 |
6062 | if (ops[i].pp) |
6063 | proto_release(ops[i].pp); |
91977a1c |
6064 | } |
6065 | } |
bd96f656 |
6066 | g_func_pp = NULL; |
91977a1c |
6067 | } |
c36e914d |
6068 | |
92d715b6 |
6069 | struct func_proto_dep; |
6070 | |
6071 | struct func_prototype { |
6072 | char name[NAMELEN]; |
6073 | int id; |
6074 | int argc_stack; |
6075 | int regmask_dep; |
91ca764a |
6076 | int has_ret:3; // -1, 0, 1: unresolved, no, yes |
92d715b6 |
6077 | unsigned int dep_resolved:1; |
6078 | unsigned int is_stdcall:1; |
6079 | struct func_proto_dep *dep_func; |
6080 | int dep_func_cnt; |
91ca764a |
6081 | const struct parsed_proto *pp; // seed pp, if any |
92d715b6 |
6082 | }; |
6083 | |
6084 | struct func_proto_dep { |
6085 | char *name; |
6086 | struct func_prototype *proto; |
6087 | int regmask_live; // .. at the time of call |
6088 | unsigned int ret_dep:1; // return from this is caller's return |
6089 | }; |
6090 | |
6091 | static struct func_prototype *hg_fp; |
6092 | static int hg_fp_cnt; |
6093 | |
5fa1256f |
6094 | static struct scanned_var { |
6095 | char name[NAMELEN]; |
6096 | enum opr_lenmod lmod; |
6097 | unsigned int is_seeded:1; |
61e29183 |
6098 | unsigned int is_c_str:1; |
c0de9015 |
6099 | const struct parsed_proto *pp; // seed pp, if any |
5fa1256f |
6100 | } *hg_vars; |
6101 | static int hg_var_cnt; |
6102 | |
9af2d373 |
6103 | static void output_hdr_fp(FILE *fout, const struct func_prototype *fp, |
6104 | int count); |
6105 | |
ebc4dc43 |
6106 | struct func_prototype *hg_fp_add(const char *funcn) |
6107 | { |
6108 | struct func_prototype *fp; |
6109 | |
6110 | if ((hg_fp_cnt & 0xff) == 0) { |
6111 | hg_fp = realloc(hg_fp, sizeof(hg_fp[0]) * (hg_fp_cnt + 0x100)); |
6112 | my_assert_not(hg_fp, NULL); |
6113 | memset(hg_fp + hg_fp_cnt, 0, sizeof(hg_fp[0]) * 0x100); |
6114 | } |
6115 | |
6116 | fp = &hg_fp[hg_fp_cnt]; |
6117 | snprintf(fp->name, sizeof(fp->name), "%s", funcn); |
6118 | fp->id = hg_fp_cnt; |
6119 | fp->argc_stack = -1; |
6120 | hg_fp_cnt++; |
6121 | |
6122 | return fp; |
6123 | } |
6124 | |
92d715b6 |
6125 | static struct func_proto_dep *hg_fp_find_dep(struct func_prototype *fp, |
6126 | const char *name) |
6127 | { |
6128 | int i; |
6129 | |
6130 | for (i = 0; i < fp->dep_func_cnt; i++) |
6131 | if (IS(fp->dep_func[i].name, name)) |
6132 | return &fp->dep_func[i]; |
6133 | |
6134 | return NULL; |
6135 | } |
6136 | |
6137 | static void hg_fp_add_dep(struct func_prototype *fp, const char *name) |
6138 | { |
6139 | // is it a dupe? |
6140 | if (hg_fp_find_dep(fp, name)) |
6141 | return; |
6142 | |
6143 | if ((fp->dep_func_cnt & 0xff) == 0) { |
6144 | fp->dep_func = realloc(fp->dep_func, |
6145 | sizeof(fp->dep_func[0]) * (fp->dep_func_cnt + 0x100)); |
6146 | my_assert_not(fp->dep_func, NULL); |
6147 | memset(&fp->dep_func[fp->dep_func_cnt], 0, |
6148 | sizeof(fp->dep_func[0]) * 0x100); |
6149 | } |
6150 | fp->dep_func[fp->dep_func_cnt].name = strdup(name); |
6151 | fp->dep_func_cnt++; |
6152 | } |
6153 | |
6154 | static int hg_fp_cmp_name(const void *p1_, const void *p2_) |
6155 | { |
6156 | const struct func_prototype *p1 = p1_, *p2 = p2_; |
6157 | return strcmp(p1->name, p2->name); |
6158 | } |
6159 | |
6160 | #if 0 |
6161 | static int hg_fp_cmp_id(const void *p1_, const void *p2_) |
6162 | { |
6163 | const struct func_prototype *p1 = p1_, *p2 = p2_; |
6164 | return p1->id - p2->id; |
6165 | } |
6166 | #endif |
6167 | |
91ca764a |
6168 | // recursive register dep pass |
6169 | // - track saved regs (part 2) |
6170 | // - try to figure out arg-regs |
6171 | // - calculate reg deps |
6172 | static void gen_hdr_dep_pass(int i, int opcnt, unsigned char *cbits, |
6173 | struct func_prototype *fp, int regmask_save, int regmask_dst, |
6174 | int *regmask_dep, int *has_ret) |
6175 | { |
6176 | struct func_proto_dep *dep; |
6177 | struct parsed_op *po; |
6178 | int from_caller = 0; |
6179 | int depth; |
6180 | int j, l; |
6181 | int reg; |
6182 | int ret; |
6183 | |
6184 | for (; i < opcnt; i++) |
6185 | { |
6186 | if (cbits[i >> 3] & (1 << (i & 7))) |
6187 | return; |
6188 | cbits[i >> 3] |= (1 << (i & 7)); |
6189 | |
6190 | po = &ops[i]; |
6191 | |
6192 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
04abc5d6 |
6193 | if (po->flags & OPF_RMD) |
6194 | continue; |
6195 | |
91ca764a |
6196 | if (po->btj != NULL) { |
6197 | // jumptable |
6198 | for (j = 0; j < po->btj->count; j++) { |
db63af51 |
6199 | check_i(po, po->btj->d[j].bt_i); |
91ca764a |
6200 | gen_hdr_dep_pass(po->btj->d[j].bt_i, opcnt, cbits, fp, |
6201 | regmask_save, regmask_dst, regmask_dep, has_ret); |
6202 | } |
6203 | return; |
6204 | } |
6205 | |
db63af51 |
6206 | check_i(po, po->bt_i); |
91ca764a |
6207 | if (po->flags & OPF_CJMP) { |
6208 | gen_hdr_dep_pass(po->bt_i, opcnt, cbits, fp, |
6209 | regmask_save, regmask_dst, regmask_dep, has_ret); |
6210 | } |
6211 | else { |
6212 | i = po->bt_i - 1; |
6213 | } |
6214 | continue; |
6215 | } |
6216 | |
6217 | if (po->flags & OPF_FARG) |
6218 | /* (just calculate register deps) */; |
6219 | else if (po->op == OP_PUSH && po->operand[0].type == OPT_REG) |
6220 | { |
6221 | reg = po->operand[0].reg; |
6222 | if (reg < 0) |
6223 | ferr(po, "reg not set for push?\n"); |
6224 | |
6225 | if (po->flags & OPF_RSAVE) { |
6226 | regmask_save |= 1 << reg; |
6227 | continue; |
6228 | } |
6229 | if (po->flags & OPF_DONE) |
6230 | continue; |
6231 | |
6232 | depth = 0; |
e83ea7ed |
6233 | ret = scan_for_pop(i + 1, opcnt, i + opcnt * 2, |
6234 | po->operand[0].reg, 0, &depth, 0); |
91ca764a |
6235 | if (ret == 1) { |
6236 | regmask_save |= 1 << reg; |
6237 | po->flags |= OPF_RMD; |
e83ea7ed |
6238 | scan_for_pop(i + 1, opcnt, i + opcnt * 3, |
6239 | po->operand[0].reg, 0, &depth, 1); |
91ca764a |
6240 | continue; |
6241 | } |
6242 | } |
6243 | else if (po->flags & OPF_RMD) |
6244 | continue; |
6245 | else if (po->op == OP_CALL) { |
6246 | po->regmask_dst |= 1 << xAX; |
6247 | |
6248 | dep = hg_fp_find_dep(fp, po->operand[0].name); |
6249 | if (dep != NULL) |
6250 | dep->regmask_live = regmask_save | regmask_dst; |
6251 | } |
6252 | else if (po->op == OP_RET) { |
6253 | if (po->operand_cnt > 0) { |
6254 | fp->is_stdcall = 1; |
6255 | if (fp->argc_stack >= 0 |
6256 | && fp->argc_stack != po->operand[0].val / 4) |
6257 | ferr(po, "ret mismatch? (%d)\n", fp->argc_stack * 4); |
6258 | fp->argc_stack = po->operand[0].val / 4; |
6259 | } |
6260 | } |
6261 | |
ebc4dc43 |
6262 | // if has_ret is 0, there is uninitialized eax path, |
6263 | // which means it's most likely void func |
91ca764a |
6264 | if (*has_ret != 0 && (po->flags & OPF_TAIL)) { |
6265 | if (po->op == OP_CALL) { |
6266 | j = i; |
6267 | ret = 1; |
6268 | } |
6269 | else { |
6270 | struct parsed_opr opr = { 0, }; |
6271 | opr.type = OPT_REG; |
6272 | opr.reg = xAX; |
6273 | j = -1; |
6274 | from_caller = 0; |
6275 | ret = resolve_origin(i, &opr, i + opcnt * 4, &j, &from_caller); |
6276 | } |
6277 | |
ebc4dc43 |
6278 | if (ret != 1 && from_caller) { |
91ca764a |
6279 | // unresolved eax - probably void func |
6280 | *has_ret = 0; |
6281 | } |
6282 | else { |
ebc4dc43 |
6283 | if (j >= 0 && ops[j].op == OP_CALL) { |
6284 | dep = hg_fp_find_dep(fp, ops[j].operand[0].name); |
91ca764a |
6285 | if (dep != NULL) |
6286 | dep->ret_dep = 1; |
6287 | else |
6288 | *has_ret = 1; |
6289 | } |
6290 | else |
6291 | *has_ret = 1; |
6292 | } |
6293 | } |
6294 | |
6295 | l = regmask_save | regmask_dst; |
6296 | if (g_bp_frame && !(po->flags & OPF_EBP_S)) |
6297 | l |= 1 << xBP; |
6298 | |
6299 | l = po->regmask_src & ~l; |
6300 | #if 0 |
6301 | if (l) |
6302 | fnote(po, "dep |= %04x, dst %04x, save %04x (f %x)\n", |
6303 | l, regmask_dst, regmask_save, po->flags); |
6304 | #endif |
6305 | *regmask_dep |= l; |
6306 | regmask_dst |= po->regmask_dst; |
6307 | |
6308 | if (po->flags & OPF_TAIL) |
6309 | return; |
6310 | } |
6311 | } |
6312 | |
92d715b6 |
6313 | static void gen_hdr(const char *funcn, int opcnt) |
6314 | { |
26677139 |
6315 | int save_arg_vars[MAX_ARG_GRP] = { 0, }; |
91ca764a |
6316 | unsigned char cbits[MAX_OPS / 8]; |
ebc4dc43 |
6317 | const struct parsed_proto *pp_c; |
9af2d373 |
6318 | struct parsed_proto *pp; |
92d715b6 |
6319 | struct func_prototype *fp; |
92d715b6 |
6320 | struct parsed_op *po; |
26677139 |
6321 | int regmask_dummy = 0; |
91ca764a |
6322 | int regmask_dep; |
92d715b6 |
6323 | int max_bp_offset = 0; |
91ca764a |
6324 | int has_ret; |
bfacdc83 |
6325 | int i, j, l; |
6326 | int ret; |
92d715b6 |
6327 | |
ebc4dc43 |
6328 | pp_c = proto_parse(g_fhdr, funcn, 1); |
6329 | if (pp_c != NULL) |
6330 | // already in seed, will add to hg_fp later |
9af2d373 |
6331 | return; |
ebc4dc43 |
6332 | |
6333 | fp = hg_fp_add(funcn); |
9af2d373 |
6334 | |
6335 | g_bp_frame = g_sp_frame = g_stack_fsz = 0; |
6336 | g_stack_frame_used = 0; |
6337 | |
92d715b6 |
6338 | // pass1: |
66bdb2b0 |
6339 | // - resolve all branches |
6340 | // - parse calls with labels |
6341 | resolve_branches_parse_calls(opcnt); |
6342 | |
6343 | // pass2: |
9af2d373 |
6344 | // - handle ebp/esp frame, remove ops related to it |
6345 | scan_prologue_epilogue(opcnt); |
6346 | |
66bdb2b0 |
6347 | // pass3: |
6348 | // - remove dead labels |
92d715b6 |
6349 | // - collect calls |
92d715b6 |
6350 | for (i = 0; i < opcnt; i++) |
6351 | { |
66bdb2b0 |
6352 | if (g_labels[i] != NULL && g_label_refs[i].i == -1) { |
6353 | free(g_labels[i]); |
6354 | g_labels[i] = NULL; |
6355 | } |
92d715b6 |
6356 | |
66bdb2b0 |
6357 | po = &ops[i]; |
5e49b270 |
6358 | if (po->flags & (OPF_RMD|OPF_DONE)) |
92d715b6 |
6359 | continue; |
6360 | |
6361 | if (po->op == OP_CALL) { |
66bdb2b0 |
6362 | if (po->operand[0].type == OPT_LABEL) |
6363 | hg_fp_add_dep(fp, opr_name(po, 0)); |
6364 | else if (po->pp != NULL) |
6365 | hg_fp_add_dep(fp, po->pp->name); |
92d715b6 |
6366 | } |
92d715b6 |
6367 | } |
6368 | |
66bdb2b0 |
6369 | // pass4: |
92d715b6 |
6370 | // - remove dead labels |
9af2d373 |
6371 | // - handle push <const>/pop pairs |
92d715b6 |
6372 | for (i = 0; i < opcnt; i++) |
6373 | { |
d7857c3a |
6374 | if (g_labels[i] != NULL && g_label_refs[i].i == -1) { |
6375 | free(g_labels[i]); |
6376 | g_labels[i] = NULL; |
6377 | } |
9af2d373 |
6378 | |
91ca764a |
6379 | po = &ops[i]; |
6380 | if (po->flags & (OPF_RMD|OPF_DONE)) |
6381 | continue; |
6382 | |
6383 | if (po->op == OP_PUSH && po->operand[0].type == OPT_CONST) |
e83ea7ed |
6384 | scan_for_pop_const(i, opcnt, i + opcnt * 13); |
91ca764a |
6385 | } |
6386 | |
66bdb2b0 |
6387 | // pass5: |
91ca764a |
6388 | // - process trivial calls |
6389 | for (i = 0; i < opcnt; i++) |
6390 | { |
9af2d373 |
6391 | po = &ops[i]; |
5e49b270 |
6392 | if (po->flags & (OPF_RMD|OPF_DONE)) |
9af2d373 |
6393 | continue; |
6394 | |
26677139 |
6395 | if (po->op == OP_CALL) |
6396 | { |
6397 | pp = process_call_early(i, opcnt, &j); |
6398 | if (pp != NULL) { |
6399 | if (!(po->flags & OPF_ATAIL)) |
6400 | // since we know the args, try to collect them |
6401 | if (collect_call_args_early(po, i, pp, ®mask_dummy) != 0) |
6402 | pp = NULL; |
6403 | } |
6404 | |
6405 | if (pp != NULL) { |
6406 | if (j >= 0) { |
6407 | // commit esp adjust |
5e49b270 |
6408 | if (ops[j].op != OP_POP) |
6409 | patch_esp_adjust(&ops[j], pp->argc_stack * 4); |
bfacdc83 |
6410 | else { |
6411 | for (l = 0; l < pp->argc_stack; l++) |
6412 | ops[j + l].flags |= OPF_DONE | OPF_RMD; |
6413 | } |
26677139 |
6414 | } |
6415 | |
6416 | po->flags |= OPF_DONE; |
6417 | } |
6418 | } |
26677139 |
6419 | } |
6420 | |
66bdb2b0 |
6421 | // pass6: |
5e49b270 |
6422 | // - track saved regs (simple) |
26677139 |
6423 | // - process calls |
6424 | for (i = 0; i < opcnt; i++) |
6425 | { |
6426 | po = &ops[i]; |
5e49b270 |
6427 | if (po->flags & (OPF_RMD|OPF_DONE)) |
26677139 |
6428 | continue; |
6429 | |
e83ea7ed |
6430 | if (po->op == OP_PUSH && po->operand[0].type == OPT_REG |
6431 | && po->operand[0].reg != xCX) |
5e49b270 |
6432 | { |
e83ea7ed |
6433 | ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, 0); |
5e49b270 |
6434 | if (ret == 0) { |
91ca764a |
6435 | // regmask_save |= 1 << po->operand[0].reg; // do it later |
6436 | po->flags |= OPF_RSAVE | OPF_RMD | OPF_DONE; |
e83ea7ed |
6437 | scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, OPF_RMD); |
5e49b270 |
6438 | } |
6439 | } |
e83ea7ed |
6440 | else if (po->op == OP_CALL) |
26677139 |
6441 | { |
9af2d373 |
6442 | pp = process_call(i, opcnt); |
6443 | |
6444 | if (!pp->is_unresolved && !(po->flags & OPF_ATAIL)) { |
9af2d373 |
6445 | // since we know the args, collect them |
91ca764a |
6446 | ret = collect_call_args(po, i, pp, ®mask_dummy, save_arg_vars, |
5e49b270 |
6447 | i + opcnt * 1); |
9af2d373 |
6448 | } |
6449 | } |
92d715b6 |
6450 | } |
6451 | |
66bdb2b0 |
6452 | // pass7 |
91ca764a |
6453 | memset(cbits, 0, sizeof(cbits)); |
6454 | regmask_dep = 0; |
6455 | has_ret = -1; |
6456 | |
6457 | gen_hdr_dep_pass(0, opcnt, cbits, fp, 0, 0, ®mask_dep, &has_ret); |
6458 | |
6459 | // find unreachable code - must be fixed in IDA |
92d715b6 |
6460 | for (i = 0; i < opcnt; i++) |
6461 | { |
91ca764a |
6462 | if (cbits[i >> 3] & (1 << (i & 7))) |
9af2d373 |
6463 | continue; |
92d715b6 |
6464 | |
04abc5d6 |
6465 | if (g_labels[i] == NULL && i > 0 && ops[i - 1].op == OP_CALL |
6466 | && ops[i - 1].pp != NULL && ops[i - 1].pp->is_osinc) |
6467 | { |
6468 | // the compiler sometimes still generates code after |
6469 | // noreturn OS functions |
6470 | break; |
6471 | } |
91ca764a |
6472 | if (ops[i].op != OP_NOP) |
6473 | ferr(&ops[i], "unreachable code\n"); |
92d715b6 |
6474 | } |
6475 | |
9af2d373 |
6476 | for (i = 0; i < g_eqcnt; i++) { |
92d715b6 |
6477 | if (g_eqs[i].offset > max_bp_offset && g_eqs[i].offset < 4*32) |
6478 | max_bp_offset = g_eqs[i].offset; |
9af2d373 |
6479 | } |
92d715b6 |
6480 | |
9af2d373 |
6481 | if (fp->argc_stack < 0) { |
92d715b6 |
6482 | max_bp_offset = (max_bp_offset + 3) & ~3; |
9af2d373 |
6483 | fp->argc_stack = max_bp_offset / 4; |
6484 | if ((g_ida_func_attr & IDAFA_BP_FRAME) && fp->argc_stack > 0) |
92d715b6 |
6485 | fp->argc_stack--; |
6486 | } |
6487 | |
6488 | fp->regmask_dep = regmask_dep & ~(1 << xSP); |
6489 | fp->has_ret = has_ret; |
91ca764a |
6490 | #if 0 |
6491 | printf("// has_ret %d, regmask_dep %x\n", |
6492 | fp->has_ret, fp->regmask_dep); |
6493 | output_hdr_fp(stdout, fp, 1); |
ebc4dc43 |
6494 | if (IS(funcn, "sub_10007F72")) exit(1); |
91ca764a |
6495 | #endif |
9af2d373 |
6496 | |
6497 | gen_x_cleanup(opcnt); |
92d715b6 |
6498 | } |
6499 | |
6500 | static void hg_fp_resolve_deps(struct func_prototype *fp) |
6501 | { |
6502 | struct func_prototype fp_s; |
91ca764a |
6503 | int dep; |
92d715b6 |
6504 | int i; |
6505 | |
6506 | // this thing is recursive, so mark first.. |
6507 | fp->dep_resolved = 1; |
6508 | |
6509 | for (i = 0; i < fp->dep_func_cnt; i++) { |
6510 | strcpy(fp_s.name, fp->dep_func[i].name); |
6511 | fp->dep_func[i].proto = bsearch(&fp_s, hg_fp, hg_fp_cnt, |
6512 | sizeof(hg_fp[0]), hg_fp_cmp_name); |
6513 | if (fp->dep_func[i].proto != NULL) { |
6514 | if (!fp->dep_func[i].proto->dep_resolved) |
6515 | hg_fp_resolve_deps(fp->dep_func[i].proto); |
6516 | |
91ca764a |
6517 | dep = ~fp->dep_func[i].regmask_live |
6518 | & fp->dep_func[i].proto->regmask_dep; |
6519 | fp->regmask_dep |= dep; |
6520 | // printf("dep %s %s |= %x\n", fp->name, |
6521 | // fp->dep_func[i].name, dep); |
92d715b6 |
6522 | |
ebc4dc43 |
6523 | if (fp->has_ret == -1 && fp->dep_func[i].ret_dep) |
92d715b6 |
6524 | fp->has_ret = fp->dep_func[i].proto->has_ret; |
6525 | } |
6526 | } |
6527 | } |
6528 | |
9af2d373 |
6529 | static void output_hdr_fp(FILE *fout, const struct func_prototype *fp, |
6530 | int count) |
92d715b6 |
6531 | { |
61e29183 |
6532 | const struct parsed_proto *pp; |
6533 | char *p, namebuf[NAMELEN]; |
6534 | const char *name; |
92d715b6 |
6535 | int regmask_dep; |
6536 | int argc_stack; |
9af2d373 |
6537 | int j, arg; |
92d715b6 |
6538 | |
9af2d373 |
6539 | for (; count > 0; count--, fp++) { |
92d715b6 |
6540 | if (fp->has_ret == -1) |
6541 | fprintf(fout, "// ret unresolved\n"); |
6542 | #if 0 |
6543 | fprintf(fout, "// dep:"); |
6544 | for (j = 0; j < fp->dep_func_cnt; j++) { |
6545 | fprintf(fout, " %s/", fp->dep_func[j].name); |
6546 | if (fp->dep_func[j].proto != NULL) |
6547 | fprintf(fout, "%04x/%d", fp->dep_func[j].proto->regmask_dep, |
6548 | fp->dep_func[j].proto->has_ret); |
6549 | } |
6550 | fprintf(fout, "\n"); |
6551 | #endif |
6552 | |
61e29183 |
6553 | p = strchr(fp->name, '@'); |
6554 | if (p != NULL) { |
6555 | memcpy(namebuf, fp->name, p - fp->name); |
6556 | namebuf[p - fp->name] = 0; |
6557 | name = namebuf; |
6558 | } |
6559 | else |
6560 | name = fp->name; |
6561 | if (name[0] == '_') |
6562 | name++; |
6563 | |
6564 | pp = proto_parse(g_fhdr, name, 1); |
6565 | if (pp != NULL && pp->is_include) |
6566 | continue; |
6567 | |
c0de9015 |
6568 | if (fp->pp != NULL) { |
4e81a3a2 |
6569 | // part of seed, output later |
6570 | continue; |
c0de9015 |
6571 | } |
6572 | |
92d715b6 |
6573 | regmask_dep = fp->regmask_dep; |
6574 | argc_stack = fp->argc_stack; |
6575 | |
91ca764a |
6576 | fprintf(fout, "%-5s", fp->pp ? fp->pp->ret_type.name : |
6577 | (fp->has_ret ? "int" : "void")); |
92d715b6 |
6578 | if (regmask_dep && (fp->is_stdcall || argc_stack == 0) |
6579 | && (regmask_dep & ~((1 << xCX) | (1 << xDX))) == 0) |
6580 | { |
9af2d373 |
6581 | fprintf(fout, " __fastcall "); |
92d715b6 |
6582 | if (!(regmask_dep & (1 << xDX)) && argc_stack == 0) |
6583 | argc_stack = 1; |
6584 | else |
6585 | argc_stack += 2; |
6586 | regmask_dep = 0; |
6587 | } |
6588 | else if (regmask_dep && !fp->is_stdcall) { |
6589 | fprintf(fout, "/*__usercall*/ "); |
92d715b6 |
6590 | } |
6591 | else if (regmask_dep) { |
6592 | fprintf(fout, "/*__userpurge*/ "); |
92d715b6 |
6593 | } |
6594 | else if (fp->is_stdcall) |
9af2d373 |
6595 | fprintf(fout, " __stdcall "); |
92d715b6 |
6596 | else |
9af2d373 |
6597 | fprintf(fout, " __cdecl "); |
92d715b6 |
6598 | |
61e29183 |
6599 | fprintf(fout, "%s(", name); |
92d715b6 |
6600 | |
6601 | arg = 0; |
6602 | for (j = 0; j < xSP; j++) { |
6603 | if (regmask_dep & (1 << j)) { |
6604 | arg++; |
6605 | if (arg != 1) |
6606 | fprintf(fout, ", "); |
91ca764a |
6607 | if (fp->pp != NULL) |
6608 | fprintf(fout, "%s", fp->pp->arg[arg - 1].type.name); |
6609 | else |
6610 | fprintf(fout, "int"); |
6611 | fprintf(fout, " a%d/*<%s>*/", arg, regs_r32[j]); |
92d715b6 |
6612 | } |
6613 | } |
6614 | |
6615 | for (j = 0; j < argc_stack; j++) { |
6616 | arg++; |
6617 | if (arg != 1) |
6618 | fprintf(fout, ", "); |
91ca764a |
6619 | if (fp->pp != NULL) { |
6620 | fprintf(fout, "%s", fp->pp->arg[arg - 1].type.name); |
6621 | if (!fp->pp->arg[arg - 1].type.is_ptr) |
6622 | fprintf(fout, " "); |
6623 | } |
6624 | else |
6625 | fprintf(fout, "int "); |
6626 | fprintf(fout, "a%d", arg); |
92d715b6 |
6627 | } |
6628 | |
6629 | fprintf(fout, ");\n"); |
6630 | } |
6631 | } |
6632 | |
9af2d373 |
6633 | static void output_hdr(FILE *fout) |
6634 | { |
5fa1256f |
6635 | static const char *lmod_c_names[] = { |
6636 | [OPLM_UNSPEC] = "???", |
6637 | [OPLM_BYTE] = "uint8_t", |
6638 | [OPLM_WORD] = "uint16_t", |
6639 | [OPLM_DWORD] = "uint32_t", |
6640 | [OPLM_QWORD] = "uint64_t", |
6641 | }; |
6642 | const struct scanned_var *var; |
ebc4dc43 |
6643 | struct func_prototype *fp; |
c0de9015 |
6644 | char line[256] = { 0, }; |
ebc4dc43 |
6645 | char name[256]; |
9af2d373 |
6646 | int i; |
6647 | |
ebc4dc43 |
6648 | // add stuff from headers |
6649 | for (i = 0; i < pp_cache_size; i++) { |
6650 | if (pp_cache[i].is_cinc && !pp_cache[i].is_stdcall) |
6651 | snprintf(name, sizeof(name), "_%s", pp_cache[i].name); |
6652 | else |
6653 | snprintf(name, sizeof(name), "%s", pp_cache[i].name); |
6654 | fp = hg_fp_add(name); |
6655 | fp->pp = &pp_cache[i]; |
6656 | fp->argc_stack = fp->pp->argc_stack; |
6657 | fp->is_stdcall = fp->pp->is_stdcall; |
6658 | fp->regmask_dep = get_pp_arg_regmask(fp->pp); |
6659 | fp->has_ret = !IS(fp->pp->ret_type.name, "void"); |
6660 | } |
6661 | |
9af2d373 |
6662 | // resolve deps |
6663 | qsort(hg_fp, hg_fp_cnt, sizeof(hg_fp[0]), hg_fp_cmp_name); |
6664 | for (i = 0; i < hg_fp_cnt; i++) |
6665 | hg_fp_resolve_deps(&hg_fp[i]); |
6666 | |
6667 | // note: messes up .proto ptr, don't use |
6668 | //qsort(hg_fp, hg_fp_cnt, sizeof(hg_fp[0]), hg_fp_cmp_id); |
6669 | |
5fa1256f |
6670 | // output variables |
6671 | for (i = 0; i < hg_var_cnt; i++) { |
6672 | var = &hg_vars[i]; |
6673 | |
4e81a3a2 |
6674 | if (var->pp != NULL) |
6675 | // part of seed |
6676 | continue; |
c0de9015 |
6677 | else if (var->is_c_str) |
61e29183 |
6678 | fprintf(fout, "extern %-8s %s[];", "char", var->name); |
6679 | else |
6680 | fprintf(fout, "extern %-8s %s;", |
6681 | lmod_c_names[var->lmod], var->name); |
5fa1256f |
6682 | |
6683 | if (var->is_seeded) |
6684 | fprintf(fout, " // seeded"); |
6685 | fprintf(fout, "\n"); |
6686 | } |
6687 | |
6688 | fprintf(fout, "\n"); |
6689 | |
6690 | // output function prototypes |
9af2d373 |
6691 | output_hdr_fp(fout, hg_fp, hg_fp_cnt); |
c0de9015 |
6692 | |
4e81a3a2 |
6693 | // seed passthrough |
6694 | fprintf(fout, "\n// - seed -\n"); |
c0de9015 |
6695 | |
6696 | rewind(g_fhdr); |
4e81a3a2 |
6697 | while (fgets(line, sizeof(line), g_fhdr)) |
6698 | fwrite(line, 1, strlen(line), fout); |
9af2d373 |
6699 | } |
6700 | |
61e29183 |
6701 | // '=' needs special treatment |
6702 | // also ' quote |
bfa4a6ee |
6703 | static char *next_word_s(char *w, size_t wsize, char *s) |
6704 | { |
61e29183 |
6705 | size_t i; |
bfa4a6ee |
6706 | |
61e29183 |
6707 | s = sskip(s); |
bfa4a6ee |
6708 | |
61e29183 |
6709 | i = 0; |
6710 | if (*s == '\'') { |
6711 | w[0] = s[0]; |
6712 | for (i = 1; i < wsize - 1; i++) { |
6713 | if (s[i] == 0) { |
6714 | printf("warning: missing closing quote: \"%s\"\n", s); |
6715 | break; |
6716 | } |
6717 | if (s[i] == '\'') |
6718 | break; |
6719 | w[i] = s[i]; |
6720 | } |
6721 | } |
bfa4a6ee |
6722 | |
61e29183 |
6723 | for (; i < wsize - 1; i++) { |
6724 | if (s[i] == 0 || my_isblank(s[i]) || (s[i] == '=' && i > 0)) |
6725 | break; |
6726 | w[i] = s[i]; |
6727 | } |
6728 | w[i] = 0; |
6729 | |
6730 | if (s[i] != 0 && !my_isblank(s[i]) && s[i] != '=') |
6731 | printf("warning: '%s' truncated\n", w); |
bfa4a6ee |
6732 | |
61e29183 |
6733 | return s + i; |
bfa4a6ee |
6734 | } |
6735 | |
5fa1256f |
6736 | static void scan_variables(FILE *fasm) |
6737 | { |
5fa1256f |
6738 | struct scanned_var *var; |
6739 | char line[256] = { 0, }; |
61e29183 |
6740 | char words[3][256]; |
5fa1256f |
6741 | char *p = NULL; |
6742 | int wordc; |
61e29183 |
6743 | int l; |
5fa1256f |
6744 | |
6745 | while (!feof(fasm)) |
6746 | { |
6747 | // skip to next data section |
6748 | while (my_fgets(line, sizeof(line), fasm)) |
6749 | { |
6750 | asmln++; |
6751 | |
6752 | p = sskip(line); |
6753 | if (*p == 0 || *p == ';') |
6754 | continue; |
6755 | |
6756 | p = sskip(next_word_s(words[0], sizeof(words[0]), p)); |
6757 | if (*p == 0 || *p == ';') |
6758 | continue; |
6759 | |
6760 | if (*p != 's' || !IS_START(p, "segment para public")) |
6761 | continue; |
6762 | |
6763 | break; |
6764 | } |
6765 | |
6766 | if (p == NULL || !IS_START(p, "segment para public")) |
6767 | break; |
6768 | p = sskip(p + 19); |
6769 | |
6770 | if (!IS_START(p, "'DATA'")) |
6771 | continue; |
6772 | |
6773 | // now process it |
6774 | while (my_fgets(line, sizeof(line), fasm)) |
6775 | { |
6776 | asmln++; |
6777 | |
6778 | p = line; |
6779 | if (my_isblank(*p)) |
6780 | continue; |
6781 | |
6782 | p = sskip(p); |
6783 | if (*p == 0 || *p == ';') |
6784 | continue; |
6785 | |
6786 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
6787 | words[wordc][0] = 0; |
6788 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
6789 | if (*p == 0 || *p == ';') { |
6790 | wordc++; |
6791 | break; |
6792 | } |
6793 | } |
6794 | |
6795 | if (wordc == 2 && IS(words[1], "ends")) |
6796 | break; |
61e29183 |
6797 | if (wordc < 2) |
6798 | continue; |
5fa1256f |
6799 | |
9ea60b8d |
6800 | if (IS_START(words[0], "__IMPORT_DESCRIPTOR_")) { |
6801 | // when this starts, we don't need anything from this section |
6802 | break; |
6803 | } |
6804 | |
5fa1256f |
6805 | if ((hg_var_cnt & 0xff) == 0) { |
6806 | hg_vars = realloc(hg_vars, sizeof(hg_vars[0]) |
6807 | * (hg_var_cnt + 0x100)); |
6808 | my_assert_not(hg_vars, NULL); |
6809 | memset(hg_vars + hg_var_cnt, 0, sizeof(hg_vars[0]) * 0x100); |
6810 | } |
6811 | |
6812 | var = &hg_vars[hg_var_cnt++]; |
6813 | snprintf(var->name, sizeof(var->name), "%s", words[0]); |
6814 | |
6815 | // maybe already in seed header? |
c0de9015 |
6816 | var->pp = proto_parse(g_fhdr, var->name, 1); |
6817 | if (var->pp != NULL) { |
6818 | if (var->pp->is_fptr) { |
5fa1256f |
6819 | var->lmod = OPLM_DWORD; |
6820 | //var->is_ptr = 1; |
6821 | } |
c0de9015 |
6822 | else if (var->pp->is_func) |
6823 | aerr("func?\n"); |
6824 | else if (!guess_lmod_from_c_type(&var->lmod, &var->pp->type)) |
5fa1256f |
6825 | aerr("unhandled C type '%s' for '%s'\n", |
c0de9015 |
6826 | var->pp->type.name, var->name); |
5fa1256f |
6827 | |
6828 | var->is_seeded = 1; |
6829 | continue; |
6830 | } |
6831 | |
6832 | if (IS(words[1], "dd")) |
6833 | var->lmod = OPLM_DWORD; |
6834 | else if (IS(words[1], "dw")) |
6835 | var->lmod = OPLM_WORD; |
61e29183 |
6836 | else if (IS(words[1], "db")) { |
5fa1256f |
6837 | var->lmod = OPLM_BYTE; |
61e29183 |
6838 | if (wordc >= 3 && (l = strlen(words[2])) > 4) { |
6839 | if (words[2][0] == '\'' && IS(words[2] + l - 2, ",0")) |
6840 | var->is_c_str = 1; |
6841 | } |
6842 | } |
5fa1256f |
6843 | else if (IS(words[1], "dq")) |
6844 | var->lmod = OPLM_QWORD; |
6845 | //else if (IS(words[1], "dt")) |
6846 | else |
6847 | aerr("type '%s' not known\n", words[1]); |
6848 | } |
6849 | } |
6850 | |
6851 | rewind(fasm); |
6852 | asmln = 0; |
6853 | } |
6854 | |
6855 | static void set_label(int i, const char *name) |
6856 | { |
6857 | const char *p; |
6858 | int len; |
6859 | |
6860 | len = strlen(name); |
6861 | p = strchr(name, ':'); |
6862 | if (p != NULL) |
6863 | len = p - name; |
6864 | |
6865 | if (g_labels[i] != NULL && !IS_START(g_labels[i], "algn_")) |
6866 | aerr("dupe label '%s' vs '%s'?\n", name, g_labels[i]); |
6867 | g_labels[i] = realloc(g_labels[i], len + 1); |
6868 | my_assert_not(g_labels[i], NULL); |
6869 | memcpy(g_labels[i], name, len); |
6870 | g_labels[i][len] = 0; |
6871 | } |
6872 | |
e56ab892 |
6873 | struct chunk_item { |
6874 | char *name; |
6875 | long fptr; |
de50b98b |
6876 | int asmln; |
e56ab892 |
6877 | }; |
6878 | |
cdfaeed7 |
6879 | static struct chunk_item *func_chunks; |
6880 | static int func_chunk_cnt; |
6881 | static int func_chunk_alloc; |
6882 | |
6883 | static void add_func_chunk(FILE *fasm, const char *name, int line) |
6884 | { |
6885 | if (func_chunk_cnt >= func_chunk_alloc) { |
6886 | func_chunk_alloc *= 2; |
6887 | func_chunks = realloc(func_chunks, |
6888 | func_chunk_alloc * sizeof(func_chunks[0])); |
6889 | my_assert_not(func_chunks, NULL); |
6890 | } |
6891 | func_chunks[func_chunk_cnt].fptr = ftell(fasm); |
6892 | func_chunks[func_chunk_cnt].name = strdup(name); |
6893 | func_chunks[func_chunk_cnt].asmln = line; |
6894 | func_chunk_cnt++; |
6895 | } |
6896 | |
e56ab892 |
6897 | static int cmp_chunks(const void *p1, const void *p2) |
6898 | { |
6899 | const struct chunk_item *c1 = p1, *c2 = p2; |
6900 | return strcmp(c1->name, c2->name); |
6901 | } |
6902 | |
bfa4a6ee |
6903 | static int cmpstringp(const void *p1, const void *p2) |
6904 | { |
6905 | return strcmp(*(char * const *)p1, *(char * const *)p2); |
6906 | } |
6907 | |
cdfaeed7 |
6908 | static void scan_ahead(FILE *fasm) |
6909 | { |
6910 | char words[2][256]; |
6911 | char line[256]; |
6912 | long oldpos; |
6913 | int oldasmln; |
6914 | int wordc; |
6915 | char *p; |
6916 | int i; |
6917 | |
6918 | oldpos = ftell(fasm); |
6919 | oldasmln = asmln; |
6920 | |
5fa1256f |
6921 | while (my_fgets(line, sizeof(line), fasm)) |
cdfaeed7 |
6922 | { |
6923 | wordc = 0; |
6924 | asmln++; |
6925 | |
6926 | p = sskip(line); |
6927 | if (*p == 0) |
6928 | continue; |
6929 | |
6930 | if (*p == ';') |
6931 | { |
6932 | // get rid of random tabs |
6933 | for (i = 0; line[i] != 0; i++) |
6934 | if (line[i] == '\t') |
6935 | line[i] = ' '; |
6936 | |
6937 | if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR ")) |
6938 | { |
6939 | p += 30; |
6940 | next_word(words[0], sizeof(words[0]), p); |
6941 | if (words[0][0] == 0) |
6942 | aerr("missing name for func chunk?\n"); |
6943 | |
6944 | add_func_chunk(fasm, words[0], asmln); |
6945 | } |
46b388c2 |
6946 | else if (IS_START(p, "; sctend")) |
6947 | break; |
6948 | |
cdfaeed7 |
6949 | continue; |
6950 | } // *p == ';' |
6951 | |
6952 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
6953 | words[wordc][0] = 0; |
6954 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
6955 | if (*p == 0 || *p == ';') { |
6956 | wordc++; |
6957 | break; |
6958 | } |
6959 | } |
6960 | |
6961 | if (wordc == 2 && IS(words[1], "ends")) |
6962 | break; |
6963 | } |
6964 | |
6965 | fseek(fasm, oldpos, SEEK_SET); |
6966 | asmln = oldasmln; |
6967 | } |
6968 | |
91977a1c |
6969 | int main(int argc, char *argv[]) |
6970 | { |
06c5d854 |
6971 | FILE *fout, *fasm, *frlist; |
4c45fa73 |
6972 | struct parsed_data *pd = NULL; |
6973 | int pd_alloc = 0; |
6974 | char **rlist = NULL; |
6975 | int rlist_len = 0; |
6976 | int rlist_alloc = 0; |
e56ab892 |
6977 | int func_chunks_used = 0; |
6978 | int func_chunks_sorted = 0; |
e56ab892 |
6979 | int func_chunk_i = -1; |
6980 | long func_chunk_ret = 0; |
de50b98b |
6981 | int func_chunk_ret_ln = 0; |
cdfaeed7 |
6982 | int scanned_ahead = 0; |
91977a1c |
6983 | char line[256]; |
a2c1d768 |
6984 | char words[20][256]; |
4c45fa73 |
6985 | enum opr_lenmod lmod; |
ddaf8bd7 |
6986 | char *sctproto = NULL; |
91977a1c |
6987 | int in_func = 0; |
4c45fa73 |
6988 | int pending_endp = 0; |
bfa4a6ee |
6989 | int skip_func = 0; |
940e8e66 |
6990 | int skip_warned = 0; |
91977a1c |
6991 | int eq_alloc; |
bfa4a6ee |
6992 | int verbose = 0; |
1f84f6b3 |
6993 | int multi_seg = 0; |
46b388c2 |
6994 | int end = 0; |
bfa4a6ee |
6995 | int arg_out; |
89ff3147 |
6996 | int arg; |
91977a1c |
6997 | int pi = 0; |
e56ab892 |
6998 | int i, j; |
6999 | int ret, len; |
91977a1c |
7000 | char *p; |
7001 | int wordc; |
7002 | |
89ff3147 |
7003 | for (arg = 1; arg < argc; arg++) { |
7004 | if (IS(argv[arg], "-v")) |
7005 | verbose = 1; |
7006 | else if (IS(argv[arg], "-rf")) |
7007 | g_allow_regfunc = 1; |
1f84f6b3 |
7008 | else if (IS(argv[arg], "-m")) |
7009 | multi_seg = 1; |
92d715b6 |
7010 | else if (IS(argv[arg], "-hdr")) |
9af2d373 |
7011 | g_header_mode = g_quiet_pp = g_allow_regfunc = 1; |
89ff3147 |
7012 | else |
7013 | break; |
bfa4a6ee |
7014 | } |
7015 | |
7016 | if (argc < arg + 3) { |
315b77eb |
7017 | printf("usage:\n%s [-v] [-rf] [-m] <.c> <.asm> <hdr.h> [rlist]*\n" |
7018 | "%s -hdr <out.h> <.asm> <seed.h> [rlist]*\n" |
7019 | "options:\n" |
7020 | " -hdr - header generation mode\n" |
7021 | " -rf - allow unannotated indirect calls\n" |
7022 | " -m - allow multiple .text sections\n" |
7023 | "[rlist] is a file with function names to skip," |
7024 | " one per line\n", |
92d715b6 |
7025 | argv[0], argv[0]); |
91977a1c |
7026 | return 1; |
7027 | } |
7028 | |
bfa4a6ee |
7029 | arg_out = arg++; |
91977a1c |
7030 | |
bfa4a6ee |
7031 | asmfn = argv[arg++]; |
91977a1c |
7032 | fasm = fopen(asmfn, "r"); |
7033 | my_assert_not(fasm, NULL); |
7034 | |
bfa4a6ee |
7035 | hdrfn = argv[arg++]; |
06c5d854 |
7036 | g_fhdr = fopen(hdrfn, "r"); |
7037 | my_assert_not(g_fhdr, NULL); |
bfa4a6ee |
7038 | |
7039 | rlist_alloc = 64; |
7040 | rlist = malloc(rlist_alloc * sizeof(rlist[0])); |
7041 | my_assert_not(rlist, NULL); |
7042 | // needs special handling.. |
7043 | rlist[rlist_len++] = "__alloca_probe"; |
7044 | |
e56ab892 |
7045 | func_chunk_alloc = 32; |
7046 | func_chunks = malloc(func_chunk_alloc * sizeof(func_chunks[0])); |
7047 | my_assert_not(func_chunks, NULL); |
7048 | |
a2c1d768 |
7049 | memset(words, 0, sizeof(words)); |
7050 | |
bfa4a6ee |
7051 | for (; arg < argc; arg++) { |
7052 | frlist = fopen(argv[arg], "r"); |
7053 | my_assert_not(frlist, NULL); |
7054 | |
5fa1256f |
7055 | while (my_fgets(line, sizeof(line), frlist)) { |
bfa4a6ee |
7056 | p = sskip(line); |
1cd4a663 |
7057 | if (*p == 0 || *p == ';') |
7058 | continue; |
7059 | if (*p == '#') { |
89ff3147 |
7060 | if (IS_START(p, "#if 0") |
7061 | || (g_allow_regfunc && IS_START(p, "#if NO_REGFUNC"))) |
7062 | { |
1cd4a663 |
7063 | skip_func = 1; |
89ff3147 |
7064 | } |
1cd4a663 |
7065 | else if (IS_START(p, "#endif")) |
7066 | skip_func = 0; |
7067 | continue; |
7068 | } |
7069 | if (skip_func) |
bfa4a6ee |
7070 | continue; |
7071 | |
7072 | p = next_word(words[0], sizeof(words[0]), p); |
7073 | if (words[0][0] == 0) |
7074 | continue; |
7075 | |
7076 | if (rlist_len >= rlist_alloc) { |
7077 | rlist_alloc = rlist_alloc * 2 + 64; |
7078 | rlist = realloc(rlist, rlist_alloc * sizeof(rlist[0])); |
7079 | my_assert_not(rlist, NULL); |
7080 | } |
7081 | rlist[rlist_len++] = strdup(words[0]); |
7082 | } |
1cd4a663 |
7083 | skip_func = 0; |
bfa4a6ee |
7084 | |
7085 | fclose(frlist); |
7086 | frlist = NULL; |
7087 | } |
7088 | |
7089 | if (rlist_len > 0) |
7090 | qsort(rlist, rlist_len, sizeof(rlist[0]), cmpstringp); |
7091 | |
7092 | fout = fopen(argv[arg_out], "w"); |
91977a1c |
7093 | my_assert_not(fout, NULL); |
7094 | |
7095 | eq_alloc = 128; |
7096 | g_eqs = malloc(eq_alloc * sizeof(g_eqs[0])); |
7097 | my_assert_not(g_eqs, NULL); |
7098 | |
4c45fa73 |
7099 | for (i = 0; i < ARRAY_SIZE(g_label_refs); i++) { |
7100 | g_label_refs[i].i = -1; |
7101 | g_label_refs[i].next = NULL; |
7102 | } |
7103 | |
5fa1256f |
7104 | if (g_header_mode) |
7105 | scan_variables(fasm); |
7106 | |
7107 | while (my_fgets(line, sizeof(line), fasm)) |
91977a1c |
7108 | { |
4c45fa73 |
7109 | wordc = 0; |
91977a1c |
7110 | asmln++; |
7111 | |
7112 | p = sskip(line); |
1bafb621 |
7113 | if (*p == 0) |
91977a1c |
7114 | continue; |
7115 | |
de50b98b |
7116 | // get rid of random tabs |
7117 | for (i = 0; line[i] != 0; i++) |
7118 | if (line[i] == '\t') |
7119 | line[i] = ' '; |
7120 | |
e56ab892 |
7121 | if (*p == ';') |
7122 | { |
e56ab892 |
7123 | if (p[2] == '=' && IS_START(p, "; =============== S U B")) |
7124 | goto do_pending_endp; // eww.. |
7125 | |
7126 | if (p[2] == 'A' && IS_START(p, "; Attributes:")) |
7127 | { |
7128 | static const char *attrs[] = { |
7129 | "bp-based frame", |
7130 | "library function", |
7131 | "static", |
7132 | "noreturn", |
7133 | "thunk", |
7134 | "fpd=", |
7135 | }; |
7136 | |
7137 | // parse IDA's attribute-list comment |
7138 | g_ida_func_attr = 0; |
7139 | p = sskip(p + 13); |
7140 | |
7141 | for (; *p != 0; p = sskip(p)) { |
7142 | for (i = 0; i < ARRAY_SIZE(attrs); i++) { |
7143 | if (!strncmp(p, attrs[i], strlen(attrs[i]))) { |
7144 | g_ida_func_attr |= 1 << i; |
7145 | p += strlen(attrs[i]); |
7146 | break; |
7147 | } |
7148 | } |
7149 | if (i == ARRAY_SIZE(attrs)) { |
7150 | anote("unparsed IDA attr: %s\n", p); |
1bafb621 |
7151 | break; |
7152 | } |
e56ab892 |
7153 | if (IS(attrs[i], "fpd=")) { |
7154 | p = next_word(words[0], sizeof(words[0]), p); |
7155 | // ignore for now.. |
7156 | } |
1bafb621 |
7157 | } |
e56ab892 |
7158 | } |
7159 | else if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR ")) |
7160 | { |
7161 | p += 30; |
7162 | next_word(words[0], sizeof(words[0]), p); |
7163 | if (words[0][0] == 0) |
cdfaeed7 |
7164 | aerr("missing name for func chunk?\n"); |
7165 | |
7166 | if (!scanned_ahead) { |
7167 | add_func_chunk(fasm, words[0], asmln); |
7168 | func_chunks_sorted = 0; |
e56ab892 |
7169 | } |
e56ab892 |
7170 | } |
7171 | else if (p[2] == 'E' && IS_START(p, "; END OF FUNCTION CHUNK")) |
7172 | { |
7173 | if (func_chunk_i >= 0) { |
7174 | if (func_chunk_i < func_chunk_cnt |
7175 | && IS(func_chunks[func_chunk_i].name, g_func)) |
7176 | { |
7177 | // move on to next chunk |
7178 | ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET); |
7179 | if (ret) |
7180 | aerr("seek failed for '%s' chunk #%d\n", |
7181 | g_func, func_chunk_i); |
de50b98b |
7182 | asmln = func_chunks[func_chunk_i].asmln; |
e56ab892 |
7183 | func_chunk_i++; |
7184 | } |
7185 | else { |
7186 | if (func_chunk_ret == 0) |
7187 | aerr("no return from chunk?\n"); |
7188 | fseek(fasm, func_chunk_ret, SEEK_SET); |
de50b98b |
7189 | asmln = func_chunk_ret_ln; |
e56ab892 |
7190 | func_chunk_ret = 0; |
7191 | pending_endp = 1; |
7192 | } |
1bafb621 |
7193 | } |
e56ab892 |
7194 | } |
7195 | else if (p[2] == 'F' && IS_START(p, "; FUNCTION CHUNK AT ")) { |
7196 | func_chunks_used = 1; |
7197 | p += 20; |
7198 | if (IS_START(g_func, "sub_")) { |
7199 | unsigned long addr = strtoul(p, NULL, 16); |
7200 | unsigned long f_addr = strtoul(g_func + 4, NULL, 16); |
cdfaeed7 |
7201 | if (addr > f_addr && !scanned_ahead) { |
94d447fb |
7202 | anote("scan_ahead caused by '%s', addr %lx\n", |
7203 | g_func, addr); |
cdfaeed7 |
7204 | scan_ahead(fasm); |
7205 | scanned_ahead = 1; |
7206 | func_chunks_sorted = 0; |
7207 | } |
1bafb621 |
7208 | } |
7209 | } |
7210 | continue; |
e56ab892 |
7211 | } // *p == ';' |
1bafb621 |
7212 | |
06c5d854 |
7213 | parse_words: |
a2c1d768 |
7214 | for (i = wordc; i < ARRAY_SIZE(words); i++) |
7215 | words[i][0] = 0; |
cdfaeed7 |
7216 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
bfa4a6ee |
7217 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
91977a1c |
7218 | if (*p == 0 || *p == ';') { |
7219 | wordc++; |
7220 | break; |
7221 | } |
7222 | } |
a2c1d768 |
7223 | if (*p != 0 && *p != ';') |
7224 | aerr("too many words\n"); |
91977a1c |
7225 | |
06c5d854 |
7226 | // alow asm patches in comments |
ddaf8bd7 |
7227 | if (*p == ';') { |
7228 | if (IS_START(p, "; sctpatch:")) { |
7229 | p = sskip(p + 11); |
7230 | if (*p == 0 || *p == ';') |
7231 | continue; |
7232 | goto parse_words; // lame |
7233 | } |
7234 | if (IS_START(p, "; sctproto:")) { |
7235 | sctproto = strdup(p + 11); |
7236 | } |
46b388c2 |
7237 | else if (IS_START(p, "; sctend")) { |
7238 | end = 1; |
7239 | if (!pending_endp) |
7240 | break; |
7241 | } |
06c5d854 |
7242 | } |
7243 | |
91977a1c |
7244 | if (wordc == 0) { |
7245 | // shouldn't happen |
7246 | awarn("wordc == 0?\n"); |
7247 | continue; |
7248 | } |
7249 | |
7250 | // don't care about this: |
7251 | if (words[0][0] == '.' |
7252 | || IS(words[0], "include") |
7253 | || IS(words[0], "assume") || IS(words[1], "segment") |
7254 | || IS(words[0], "align")) |
7255 | { |
7256 | continue; |
7257 | } |
7258 | |
4c45fa73 |
7259 | do_pending_endp: |
7260 | // do delayed endp processing to collect switch jumptables |
7261 | if (pending_endp) { |
30c8c549 |
7262 | if (in_func && !g_skip_func && !end && wordc >= 2 |
4c45fa73 |
7263 | && ((words[0][0] == 'd' && words[0][2] == 0) |
7264 | || (words[1][0] == 'd' && words[1][2] == 0))) |
7265 | { |
7266 | i = 1; |
7267 | if (words[1][0] == 'd' && words[1][2] == 0) { |
7268 | // label |
7269 | if (g_func_pd_cnt >= pd_alloc) { |
7270 | pd_alloc = pd_alloc * 2 + 16; |
7271 | g_func_pd = realloc(g_func_pd, |
7272 | sizeof(g_func_pd[0]) * pd_alloc); |
7273 | my_assert_not(g_func_pd, NULL); |
7274 | } |
7275 | pd = &g_func_pd[g_func_pd_cnt]; |
7276 | g_func_pd_cnt++; |
7277 | memset(pd, 0, sizeof(*pd)); |
7278 | strcpy(pd->label, words[0]); |
7279 | pd->type = OPT_CONST; |
7280 | pd->lmod = lmod_from_directive(words[1]); |
7281 | i = 2; |
7282 | } |
7283 | else { |
da87ae38 |
7284 | if (pd == NULL) { |
7285 | if (verbose) |
7286 | anote("skipping alignment byte?\n"); |
7287 | continue; |
7288 | } |
4c45fa73 |
7289 | lmod = lmod_from_directive(words[0]); |
7290 | if (lmod != pd->lmod) |
7291 | aerr("lmod change? %d->%d\n", pd->lmod, lmod); |
7292 | } |
7293 | |
7294 | if (pd->count_alloc < pd->count + wordc) { |
7295 | pd->count_alloc = pd->count_alloc * 2 + 14 + wordc; |
7296 | pd->d = realloc(pd->d, sizeof(pd->d[0]) * pd->count_alloc); |
7297 | my_assert_not(pd->d, NULL); |
7298 | } |
7299 | for (; i < wordc; i++) { |
7300 | if (IS(words[i], "offset")) { |
7301 | pd->type = OPT_OFFSET; |
7302 | i++; |
7303 | } |
7304 | p = strchr(words[i], ','); |
7305 | if (p != NULL) |
7306 | *p = 0; |
7307 | if (pd->type == OPT_OFFSET) |
7308 | pd->d[pd->count].u.label = strdup(words[i]); |
7309 | else |
7310 | pd->d[pd->count].u.val = parse_number(words[i]); |
7311 | pd->d[pd->count].bt_i = -1; |
7312 | pd->count++; |
7313 | } |
7314 | continue; |
7315 | } |
7316 | |
30c8c549 |
7317 | if (in_func && !g_skip_func) { |
9af2d373 |
7318 | if (g_header_mode) |
92d715b6 |
7319 | gen_hdr(g_func, pi); |
7320 | else |
7321 | gen_func(fout, g_fhdr, g_func, pi); |
7322 | } |
4c45fa73 |
7323 | |
7324 | pending_endp = 0; |
7325 | in_func = 0; |
7326 | g_ida_func_attr = 0; |
7327 | skip_warned = 0; |
30c8c549 |
7328 | g_skip_func = 0; |
4c45fa73 |
7329 | g_func[0] = 0; |
e56ab892 |
7330 | func_chunks_used = 0; |
7331 | func_chunk_i = -1; |
4c45fa73 |
7332 | if (pi != 0) { |
7333 | memset(&ops, 0, pi * sizeof(ops[0])); |
d7857c3a |
7334 | clear_labels(pi); |
4c45fa73 |
7335 | pi = 0; |
7336 | } |
7337 | g_eqcnt = 0; |
7338 | for (i = 0; i < g_func_pd_cnt; i++) { |
7339 | pd = &g_func_pd[i]; |
7340 | if (pd->type == OPT_OFFSET) { |
7341 | for (j = 0; j < pd->count; j++) |
7342 | free(pd->d[j].u.label); |
7343 | } |
7344 | free(pd->d); |
7345 | pd->d = NULL; |
7346 | } |
7347 | g_func_pd_cnt = 0; |
7348 | pd = NULL; |
46b388c2 |
7349 | |
7350 | if (end) |
7351 | break; |
4c45fa73 |
7352 | if (wordc == 0) |
7353 | continue; |
7354 | } |
7355 | |
91977a1c |
7356 | if (IS(words[1], "proc")) { |
7357 | if (in_func) |
7358 | aerr("proc '%s' while in_func '%s'?\n", |
7359 | words[0], g_func); |
bfa4a6ee |
7360 | p = words[0]; |
ddaf8bd7 |
7361 | if (bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp)) |
30c8c549 |
7362 | g_skip_func = 1; |
91977a1c |
7363 | strcpy(g_func, words[0]); |
d4e3b5db |
7364 | set_label(0, words[0]); |
91977a1c |
7365 | in_func = 1; |
7366 | continue; |
7367 | } |
7368 | |
e56ab892 |
7369 | if (IS(words[1], "endp")) |
7370 | { |
91977a1c |
7371 | if (!in_func) |
7372 | aerr("endp '%s' while not in_func?\n", words[0]); |
7373 | if (!IS(g_func, words[0])) |
7374 | aerr("endp '%s' while in_func '%s'?\n", |
7375 | words[0], g_func); |
bfa4a6ee |
7376 | |
ddaf8bd7 |
7377 | if ((g_ida_func_attr & IDAFA_THUNK) && pi == 1 |
7378 | && ops[0].op == OP_JMP && ops[0].operand[0].had_ds) |
7379 | { |
7380 | // import jump |
30c8c549 |
7381 | g_skip_func = 1; |
ddaf8bd7 |
7382 | } |
7383 | |
30c8c549 |
7384 | if (!g_skip_func && func_chunks_used) { |
e56ab892 |
7385 | // start processing chunks |
7386 | struct chunk_item *ci, key = { g_func, 0 }; |
7387 | |
7388 | func_chunk_ret = ftell(fasm); |
de50b98b |
7389 | func_chunk_ret_ln = asmln; |
e56ab892 |
7390 | if (!func_chunks_sorted) { |
7391 | qsort(func_chunks, func_chunk_cnt, |
7392 | sizeof(func_chunks[0]), cmp_chunks); |
7393 | func_chunks_sorted = 1; |
7394 | } |
7395 | ci = bsearch(&key, func_chunks, func_chunk_cnt, |
7396 | sizeof(func_chunks[0]), cmp_chunks); |
7397 | if (ci == NULL) |
7398 | aerr("'%s' needs chunks, but none found\n", g_func); |
7399 | func_chunk_i = ci - func_chunks; |
7400 | for (; func_chunk_i > 0; func_chunk_i--) |
7401 | if (!IS(func_chunks[func_chunk_i - 1].name, g_func)) |
7402 | break; |
7403 | |
7404 | ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET); |
7405 | if (ret) |
7406 | aerr("seek failed for '%s' chunk #%d\n", g_func, func_chunk_i); |
de50b98b |
7407 | asmln = func_chunks[func_chunk_i].asmln; |
e56ab892 |
7408 | func_chunk_i++; |
7409 | continue; |
7410 | } |
4c45fa73 |
7411 | pending_endp = 1; |
91977a1c |
7412 | continue; |
7413 | } |
7414 | |
1f84f6b3 |
7415 | if (wordc == 2 && IS(words[1], "ends")) { |
46b388c2 |
7416 | if (!multi_seg) { |
7417 | end = 1; |
7418 | if (pending_endp) |
7419 | goto do_pending_endp; |
1f84f6b3 |
7420 | break; |
46b388c2 |
7421 | } |
1f84f6b3 |
7422 | |
7423 | // scan for next text segment |
5fa1256f |
7424 | while (my_fgets(line, sizeof(line), fasm)) { |
1f84f6b3 |
7425 | asmln++; |
7426 | p = sskip(line); |
7427 | if (*p == 0 || *p == ';') |
7428 | continue; |
7429 | |
7430 | if (strstr(p, "segment para public 'CODE' use32")) |
7431 | break; |
7432 | } |
7433 | |
7434 | continue; |
7435 | } |
a2c1d768 |
7436 | |
bfa4a6ee |
7437 | p = strchr(words[0], ':'); |
7438 | if (p != NULL) { |
d4e3b5db |
7439 | set_label(pi, words[0]); |
bfa4a6ee |
7440 | continue; |
7441 | } |
7442 | |
30c8c549 |
7443 | if (!in_func || g_skip_func) { |
7444 | if (!skip_warned && !g_skip_func && g_labels[pi] != NULL) { |
bfa4a6ee |
7445 | if (verbose) |
7446 | anote("skipping from '%s'\n", g_labels[pi]); |
7447 | skip_warned = 1; |
7448 | } |
d7857c3a |
7449 | free(g_labels[pi]); |
7450 | g_labels[pi] = NULL; |
bfa4a6ee |
7451 | continue; |
7452 | } |
7453 | |
ddaf8bd7 |
7454 | if (wordc > 1 && IS(words[1], "=")) |
7455 | { |
91977a1c |
7456 | if (wordc != 5) |
7457 | aerr("unhandled equ, wc=%d\n", wordc); |
7458 | if (g_eqcnt >= eq_alloc) { |
7459 | eq_alloc *= 2; |
7460 | g_eqs = realloc(g_eqs, eq_alloc * sizeof(g_eqs[0])); |
7461 | my_assert_not(g_eqs, NULL); |
7462 | } |
7463 | |
7464 | len = strlen(words[0]); |
7465 | if (len > sizeof(g_eqs[0].name) - 1) |
7466 | aerr("equ name too long: %d\n", len); |
7467 | strcpy(g_eqs[g_eqcnt].name, words[0]); |
7468 | |
7469 | if (!IS(words[3], "ptr")) |
7470 | aerr("unhandled equ\n"); |
7471 | if (IS(words[2], "dword")) |
7472 | g_eqs[g_eqcnt].lmod = OPLM_DWORD; |
7473 | else if (IS(words[2], "word")) |
7474 | g_eqs[g_eqcnt].lmod = OPLM_WORD; |
7475 | else if (IS(words[2], "byte")) |
7476 | g_eqs[g_eqcnt].lmod = OPLM_BYTE; |
90307a99 |
7477 | else if (IS(words[2], "qword")) |
7478 | g_eqs[g_eqcnt].lmod = OPLM_QWORD; |
91977a1c |
7479 | else |
7480 | aerr("bad lmod: '%s'\n", words[2]); |
7481 | |
7482 | g_eqs[g_eqcnt].offset = parse_number(words[4]); |
7483 | g_eqcnt++; |
7484 | continue; |
7485 | } |
7486 | |
7487 | if (pi >= ARRAY_SIZE(ops)) |
7488 | aerr("too many ops\n"); |
7489 | |
91977a1c |
7490 | parse_op(&ops[pi], words, wordc); |
ddaf8bd7 |
7491 | |
7492 | if (sctproto != NULL) { |
8eb12e72 |
7493 | if (ops[pi].op == OP_CALL || ops[pi].op == OP_JMP) |
ddaf8bd7 |
7494 | ops[pi].datap = sctproto; |
7495 | sctproto = NULL; |
7496 | } |
91977a1c |
7497 | pi++; |
91977a1c |
7498 | } |
7499 | |
9af2d373 |
7500 | if (g_header_mode) |
92d715b6 |
7501 | output_hdr(fout); |
7502 | |
91977a1c |
7503 | fclose(fout); |
7504 | fclose(fasm); |
06c5d854 |
7505 | fclose(g_fhdr); |
91977a1c |
7506 | |
7507 | return 0; |
c36e914d |
7508 | } |
91977a1c |
7509 | |
7510 | // vim:ts=2:shiftwidth=2:expandtab |