7637b6cc |
1 | /* |
2 | * ia32rtools |
3 | * (C) notaz, 2013,2014 |
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" |
16 | |
17 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) |
18 | #define IS(w, y) !strcmp(w, y) |
39b168b8 |
19 | #define IS_START(w, y) !strncmp(w, y, strlen(y)) |
c36e914d |
20 | |
21 | #include "protoparse.h" |
22 | |
06c5d854 |
23 | static const char *asmfn; |
c36e914d |
24 | static int asmln; |
06c5d854 |
25 | static FILE *g_fhdr; |
c36e914d |
26 | |
940e8e66 |
27 | #define anote(fmt, ...) \ |
28 | printf("%s:%d: note: " fmt, asmfn, asmln, ##__VA_ARGS__) |
c36e914d |
29 | #define awarn(fmt, ...) \ |
940e8e66 |
30 | printf("%s:%d: warning: " fmt, asmfn, asmln, ##__VA_ARGS__) |
c36e914d |
31 | #define aerr(fmt, ...) do { \ |
940e8e66 |
32 | printf("%s:%d: error: " fmt, asmfn, asmln, ##__VA_ARGS__); \ |
33c35af6 |
33 | fcloseall(); \ |
c36e914d |
34 | exit(1); \ |
35 | } while (0) |
36 | |
054f95b2 |
37 | #include "masm_tools.h" |
38 | |
69a3cdfc |
39 | enum op_flags { |
87bf6cec |
40 | OPF_RMD = (1 << 0), /* removed or optimized out */ |
41 | OPF_DATA = (1 << 1), /* data processing - writes to dst opr */ |
42 | OPF_FLAGS = (1 << 2), /* sets flags */ |
5c024ef7 |
43 | OPF_JMP = (1 << 3), /* branch, call */ |
44 | OPF_CJMP = (1 << 4), /* cond. branch (cc or jecxz) */ |
45 | OPF_CC = (1 << 5), /* uses flags */ |
46 | OPF_TAIL = (1 << 6), /* ret or tail call */ |
47 | OPF_RSAVE = (1 << 7), /* push/pop is local reg save/load */ |
48 | OPF_REP = (1 << 8), /* prefixed by rep */ |
49 | OPF_REPZ = (1 << 9), /* rep is repe/repz */ |
50 | OPF_REPNZ = (1 << 10), /* rep is repne/repnz */ |
51 | OPF_FARG = (1 << 11), /* push collected as func arg (no reuse) */ |
52 | OPF_EBP_S = (1 << 12), /* ebp used as scratch here, not BP */ |
53 | OPF_DF = (1 << 13), /* DF flag set */ |
2fe80fdb |
54 | OPF_ATAIL = (1 << 14), /* tail call with reused arg frame */ |
cb090db0 |
55 | OPF_32BIT = (1 << 15), /* 32bit division */ |
037f4971 |
56 | OPF_LOCK = (1 << 16), /* op has lock prefix */ |
23fd0b11 |
57 | OPF_VAPUSH = (1 << 17), /* vararg ptr push (as call arg) */ |
c36e914d |
58 | }; |
59 | |
60 | enum op_op { |
61 | OP_INVAL, |
33c35af6 |
62 | OP_NOP, |
c36e914d |
63 | OP_PUSH, |
64 | OP_POP, |
591721d7 |
65 | OP_LEAVE, |
c36e914d |
66 | OP_MOV, |
850c9265 |
67 | OP_LEA, |
68 | OP_MOVZX, |
69 | OP_MOVSX, |
108e9fe3 |
70 | OP_XCHG, |
850c9265 |
71 | OP_NOT, |
5101a5f9 |
72 | OP_CDQ, |
092f64e1 |
73 | OP_LODS, |
33c35af6 |
74 | OP_STOS, |
d4e3b5db |
75 | OP_MOVS, |
7ba45c34 |
76 | OP_CMPS, |
591721d7 |
77 | OP_SCAS, |
78 | OP_STD, |
79 | OP_CLD, |
c36e914d |
80 | OP_RET, |
81 | OP_ADD, |
91977a1c |
82 | OP_SUB, |
850c9265 |
83 | OP_AND, |
84 | OP_OR, |
85 | OP_XOR, |
86 | OP_SHL, |
87 | OP_SHR, |
88 | OP_SAR, |
3b2f4044 |
89 | OP_SHRD, |
d4e3b5db |
90 | OP_ROL, |
91 | OP_ROR, |
cb090db0 |
92 | OP_RCL, |
93 | OP_RCR, |
69a3cdfc |
94 | OP_ADC, |
850c9265 |
95 | OP_SBB, |
1f84f6b3 |
96 | OP_BSF, |
850c9265 |
97 | OP_INC, |
98 | OP_DEC, |
5101a5f9 |
99 | OP_NEG, |
850c9265 |
100 | OP_MUL, |
101 | OP_IMUL, |
5101a5f9 |
102 | OP_DIV, |
103 | OP_IDIV, |
c36e914d |
104 | OP_TEST, |
105 | OP_CMP, |
106 | OP_CALL, |
107 | OP_JMP, |
5c024ef7 |
108 | OP_JECXZ, |
092f64e1 |
109 | OP_JCC, |
110 | OP_SCC, |
90307a99 |
111 | // x87 |
112 | // mmx |
113 | OP_EMMS, |
c36e914d |
114 | }; |
115 | |
116 | enum opr_type { |
87bf6cec |
117 | OPT_UNSPEC, |
118 | OPT_REG, |
119 | OPT_REGMEM, |
120 | OPT_LABEL, |
850c9265 |
121 | OPT_OFFSET, |
87bf6cec |
122 | OPT_CONST, |
c36e914d |
123 | }; |
124 | |
2b43685d |
125 | // must be sorted (larger len must be further in enum) |
c36e914d |
126 | enum opr_lenmod { |
91977a1c |
127 | OPLM_UNSPEC, |
128 | OPLM_BYTE, |
129 | OPLM_WORD, |
130 | OPLM_DWORD, |
90307a99 |
131 | OPLM_QWORD, |
c36e914d |
132 | }; |
133 | |
850c9265 |
134 | #define MAX_OPERANDS 3 |
c36e914d |
135 | |
136 | struct parsed_opr { |
91977a1c |
137 | enum opr_type type; |
138 | enum opr_lenmod lmod; |
7ba45c34 |
139 | unsigned int is_ptr:1; // pointer in C |
140 | unsigned int is_array:1; // array in C |
a3684be1 |
141 | unsigned int type_from_var:1; // .. in header, sometimes wrong |
2b43685d |
142 | unsigned int size_mismatch:1; // type override differs from C |
143 | unsigned int size_lt:1; // type override is larger than C |
ddaf8bd7 |
144 | unsigned int had_ds:1; // had ds: prefix |
c7ed83dd |
145 | const struct parsed_proto *pp; // for OPT_LABEL |
91977a1c |
146 | int reg; |
147 | unsigned int val; |
c7ed83dd |
148 | char name[112]; |
c36e914d |
149 | }; |
150 | |
151 | struct parsed_op { |
91977a1c |
152 | enum op_op op; |
153 | struct parsed_opr operand[MAX_OPERANDS]; |
69a3cdfc |
154 | unsigned int flags; |
092f64e1 |
155 | unsigned char pfo; |
156 | unsigned char pfo_inv; |
157 | unsigned char operand_cnt; |
5f70a34f |
158 | unsigned char p_argnum; // push: altered before call arg # |
159 | unsigned char p_argpass;// push: arg of host func |
160 | unsigned char pad[3]; |
69a3cdfc |
161 | int regmask_src; // all referensed regs |
162 | int regmask_dst; |
940e8e66 |
163 | int pfomask; // flagop: parsed_flag_op that can't be delayed |
940e8e66 |
164 | int cc_scratch; // scratch storage during analysis |
4c45fa73 |
165 | int bt_i; // branch target for branches |
166 | struct parsed_data *btj;// branch targets for jumptables |
c7ed83dd |
167 | struct parsed_proto *pp;// parsed_proto for OP_CALL |
91977a1c |
168 | void *datap; |
8eb12e72 |
169 | int asmln; |
91977a1c |
170 | }; |
171 | |
69a3cdfc |
172 | // datap: |
092f64e1 |
173 | // OP_CALL - parser proto hint (str) |
2b43685d |
174 | // (OPF_CC) - point to one of (OPF_FLAGS) that affects cc op |
5c024ef7 |
175 | // OP_POP - point to OP_PUSH in push/pop pair |
69a3cdfc |
176 | |
91977a1c |
177 | struct parsed_equ { |
178 | char name[64]; |
179 | enum opr_lenmod lmod; |
180 | int offset; |
c36e914d |
181 | }; |
182 | |
4c45fa73 |
183 | struct parsed_data { |
184 | char label[256]; |
185 | enum opr_type type; |
186 | enum opr_lenmod lmod; |
187 | int count; |
188 | int count_alloc; |
189 | struct { |
190 | union { |
191 | char *label; |
63df67be |
192 | unsigned int val; |
4c45fa73 |
193 | } u; |
194 | int bt_i; |
195 | } *d; |
196 | }; |
197 | |
198 | struct label_ref { |
199 | int i; |
200 | struct label_ref *next; |
201 | }; |
202 | |
1bafb621 |
203 | enum ida_func_attr { |
204 | IDAFA_BP_FRAME = (1 << 0), |
205 | IDAFA_LIB_FUNC = (1 << 1), |
206 | IDAFA_STATIC = (1 << 2), |
207 | IDAFA_NORETURN = (1 << 3), |
208 | IDAFA_THUNK = (1 << 4), |
209 | IDAFA_FPD = (1 << 5), |
210 | }; |
211 | |
212 | #define MAX_OPS 4096 |
c36e914d |
213 | |
214 | static struct parsed_op ops[MAX_OPS]; |
91977a1c |
215 | static struct parsed_equ *g_eqs; |
216 | static int g_eqcnt; |
037f4971 |
217 | static char g_labels[MAX_OPS][48]; |
4c45fa73 |
218 | static struct label_ref g_label_refs[MAX_OPS]; |
bd96f656 |
219 | static const struct parsed_proto *g_func_pp; |
4c45fa73 |
220 | static struct parsed_data *g_func_pd; |
221 | static int g_func_pd_cnt; |
91977a1c |
222 | static char g_func[256]; |
223 | static char g_comment[256]; |
224 | static int g_bp_frame; |
1bafb621 |
225 | static int g_sp_frame; |
a2c1d768 |
226 | static int g_stack_frame_used; |
1bafb621 |
227 | static int g_stack_fsz; |
4c45fa73 |
228 | static int g_ida_func_attr; |
89ff3147 |
229 | static int g_allow_regfunc; |
91977a1c |
230 | #define ferr(op_, fmt, ...) do { \ |
8eb12e72 |
231 | printf("%s:%d: error: [%s] '%s': " fmt, asmfn, (op_)->asmln, g_func, \ |
850c9265 |
232 | dump_op(op_), ##__VA_ARGS__); \ |
33c35af6 |
233 | fcloseall(); \ |
91977a1c |
234 | exit(1); \ |
235 | } while (0) |
de50b98b |
236 | #define fnote(op_, fmt, ...) \ |
8eb12e72 |
237 | printf("%s:%d: note: [%s] '%s': " fmt, asmfn, (op_)->asmln, g_func, \ |
de50b98b |
238 | dump_op(op_), ##__VA_ARGS__) |
91977a1c |
239 | |
90307a99 |
240 | const char *regs_r32[] = { |
241 | "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp", |
242 | // not r32, but list here for easy parsing and printing |
243 | "mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7", |
244 | }; |
91977a1c |
245 | const char *regs_r16[] = { "ax", "bx", "cx", "dx", "si", "di", "bp", "sp" }; |
246 | const char *regs_r8l[] = { "al", "bl", "cl", "dl" }; |
247 | const char *regs_r8h[] = { "ah", "bh", "ch", "dh" }; |
248 | |
249 | enum x86_regs { xUNSPEC = -1, xAX, xBX, xCX, xDX, xSI, xDI, xBP, xSP }; |
250 | |
69a3cdfc |
251 | // possible basic comparison types (without inversion) |
252 | enum parsed_flag_op { |
253 | PFO_O, // 0 OF=1 |
254 | PFO_C, // 2 CF=1 |
255 | PFO_Z, // 4 ZF=1 |
256 | PFO_BE, // 6 CF=1||ZF=1 |
257 | PFO_S, // 8 SF=1 |
258 | PFO_P, // a PF=1 |
259 | PFO_L, // c SF!=OF |
260 | PFO_LE, // e ZF=1||SF!=OF |
261 | }; |
262 | |
90307a99 |
263 | #define PFOB_O (1 << PFO_O) |
264 | #define PFOB_C (1 << PFO_C) |
265 | #define PFOB_Z (1 << PFO_Z) |
266 | #define PFOB_S (1 << PFO_S) |
267 | |
69a3cdfc |
268 | static const char *parsed_flag_op_names[] = { |
269 | "o", "c", "z", "be", "s", "p", "l", "le" |
270 | }; |
271 | |
91977a1c |
272 | static int char_array_i(const char *array[], size_t len, const char *s) |
273 | { |
274 | int i; |
c36e914d |
275 | |
91977a1c |
276 | for (i = 0; i < len; i++) |
277 | if (IS(s, array[i])) |
278 | return i; |
c36e914d |
279 | |
91977a1c |
280 | return -1; |
281 | } |
282 | |
63df67be |
283 | static void printf_number(char *buf, size_t buf_size, |
284 | unsigned long number) |
91977a1c |
285 | { |
5101a5f9 |
286 | // output in C-friendly form |
287 | snprintf(buf, buf_size, number < 10 ? "%lu" : "0x%02lx", number); |
288 | } |
91977a1c |
289 | |
fdd5548a |
290 | static int check_segment_prefix(const char *s) |
291 | { |
292 | if (s[0] == 0 || s[1] != 's' || s[2] != ':') |
293 | return 0; |
294 | |
295 | switch (s[0]) { |
296 | case 'c': return 1; |
297 | case 'd': return 2; |
298 | case 's': return 3; |
299 | case 'e': return 4; |
300 | case 'f': return 5; |
301 | case 'g': return 6; |
302 | default: return 0; |
303 | } |
304 | } |
305 | |
5101a5f9 |
306 | static int parse_reg(enum opr_lenmod *reg_lmod, const char *s) |
307 | { |
308 | int reg; |
91977a1c |
309 | |
5101a5f9 |
310 | reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s); |
90307a99 |
311 | if (reg >= 8) { |
312 | *reg_lmod = OPLM_QWORD; |
313 | return reg; |
314 | } |
5101a5f9 |
315 | if (reg >= 0) { |
316 | *reg_lmod = OPLM_DWORD; |
317 | return reg; |
91977a1c |
318 | } |
5101a5f9 |
319 | reg = char_array_i(regs_r16, ARRAY_SIZE(regs_r16), s); |
320 | if (reg >= 0) { |
321 | *reg_lmod = OPLM_WORD; |
322 | return reg; |
323 | } |
324 | reg = char_array_i(regs_r8h, ARRAY_SIZE(regs_r8h), s); |
325 | if (reg >= 0) { |
326 | *reg_lmod = OPLM_BYTE; |
327 | return reg; |
328 | } |
329 | reg = char_array_i(regs_r8l, ARRAY_SIZE(regs_r8l), s); |
330 | if (reg >= 0) { |
331 | *reg_lmod = OPLM_BYTE; |
332 | return reg; |
850c9265 |
333 | } |
334 | |
335 | return -1; |
91977a1c |
336 | } |
337 | |
5101a5f9 |
338 | static int parse_indmode(char *name, int *regmask, int need_c_cvt) |
339 | { |
340 | enum opr_lenmod lmod; |
341 | char cvtbuf[256]; |
342 | char *d = cvtbuf; |
343 | char *s = name; |
344 | char w[64]; |
345 | long number; |
346 | int reg; |
347 | int c = 0; |
348 | |
349 | *d = 0; |
350 | |
351 | while (*s != 0) { |
352 | d += strlen(d); |
353 | while (my_isblank(*s)) |
354 | s++; |
355 | for (; my_issep(*s); d++, s++) |
356 | *d = *s; |
357 | while (my_isblank(*s)) |
358 | s++; |
359 | *d = 0; |
360 | |
fdd5548a |
361 | // skip '?s:' prefixes |
362 | if (check_segment_prefix(s)) |
87bf6cec |
363 | s += 3; |
364 | |
5101a5f9 |
365 | s = next_idt(w, sizeof(w), s); |
366 | if (w[0] == 0) |
367 | break; |
368 | c++; |
369 | |
370 | reg = parse_reg(&lmod, w); |
371 | if (reg >= 0) { |
372 | *regmask |= 1 << reg; |
373 | goto pass; |
374 | } |
375 | |
376 | if ('0' <= w[0] && w[0] <= '9') { |
377 | number = parse_number(w); |
378 | printf_number(d, sizeof(cvtbuf) - (d - cvtbuf), number); |
379 | continue; |
380 | } |
381 | |
382 | // probably some label/identifier - pass |
383 | |
384 | pass: |
385 | snprintf(d, sizeof(cvtbuf) - (d - cvtbuf), "%s", w); |
386 | } |
387 | |
388 | if (need_c_cvt) |
389 | strcpy(name, cvtbuf); |
390 | |
391 | return c; |
392 | } |
393 | |
4c45fa73 |
394 | static int is_reg_in_str(const char *s) |
395 | { |
396 | int i; |
397 | |
398 | if (strlen(s) < 3 || (s[3] && !my_issep(s[3]) && !my_isblank(s[3]))) |
399 | return 0; |
400 | |
401 | for (i = 0; i < ARRAY_SIZE(regs_r32); i++) |
402 | if (!strncmp(s, regs_r32[i], 3)) |
403 | return 1; |
404 | |
405 | return 0; |
406 | } |
407 | |
09bc6fd5 |
408 | static const char *parse_stack_el(const char *name, char *extra_reg, |
409 | int early_try) |
d4e3b5db |
410 | { |
4c45fa73 |
411 | const char *p, *p2, *s; |
1bafb621 |
412 | char *endp = NULL; |
d4e3b5db |
413 | char buf[32]; |
1bafb621 |
414 | long val; |
d4e3b5db |
415 | int len; |
416 | |
09bc6fd5 |
417 | if (g_bp_frame || early_try) |
418 | { |
419 | p = name; |
420 | if (IS_START(p + 3, "+ebp+") && is_reg_in_str(p)) { |
421 | p += 4; |
422 | if (extra_reg != NULL) { |
423 | strncpy(extra_reg, name, 3); |
424 | extra_reg[4] = 0; |
425 | } |
4c45fa73 |
426 | } |
4c45fa73 |
427 | |
09bc6fd5 |
428 | if (IS_START(p, "ebp+")) { |
429 | p += 4; |
4c45fa73 |
430 | |
09bc6fd5 |
431 | p2 = strchr(p, '+'); |
432 | if (p2 != NULL && is_reg_in_str(p)) { |
433 | if (extra_reg != NULL) { |
434 | strncpy(extra_reg, p, p2 - p); |
435 | extra_reg[p2 - p] = 0; |
436 | } |
437 | p = p2 + 1; |
4c45fa73 |
438 | } |
4c45fa73 |
439 | |
09bc6fd5 |
440 | if (!('0' <= *p && *p <= '9')) |
441 | return p; |
4c45fa73 |
442 | |
09bc6fd5 |
443 | return NULL; |
444 | } |
4c45fa73 |
445 | } |
446 | |
39b168b8 |
447 | if (!IS_START(name, "esp+")) |
d4e3b5db |
448 | return NULL; |
449 | |
037f4971 |
450 | s = name + 4; |
451 | p = strchr(s, '+'); |
d4e3b5db |
452 | if (p) { |
037f4971 |
453 | if (is_reg_in_str(s)) { |
454 | if (extra_reg != NULL) { |
455 | strncpy(extra_reg, s, p - s); |
456 | extra_reg[p - s] = 0; |
457 | } |
458 | s = p + 1; |
459 | p = strchr(s, '+'); |
460 | if (p == NULL) |
461 | aerr("%s IDA stackvar not set?\n", __func__); |
462 | } |
1bafb621 |
463 | if (!('0' <= *s && *s <= '9')) { |
037f4971 |
464 | aerr("%s IDA stackvar offset not set?\n", __func__); |
d4e3b5db |
465 | return NULL; |
1bafb621 |
466 | } |
467 | if (s[0] == '0' && s[1] == 'x') |
468 | s += 2; |
469 | len = p - s; |
d4e3b5db |
470 | if (len < sizeof(buf) - 1) { |
1bafb621 |
471 | strncpy(buf, s, len); |
d4e3b5db |
472 | buf[len] = 0; |
1bafb621 |
473 | val = strtol(buf, &endp, 16); |
474 | if (val == 0 || *endp != 0) { |
475 | aerr("%s num parse fail for '%s'\n", __func__, buf); |
476 | return NULL; |
477 | } |
d4e3b5db |
478 | } |
479 | p++; |
480 | } |
481 | else |
482 | p = name + 4; |
483 | |
484 | if ('0' <= *p && *p <= '9') |
485 | return NULL; |
486 | |
487 | return p; |
488 | } |
489 | |
850c9265 |
490 | static int guess_lmod_from_name(struct parsed_opr *opr) |
491 | { |
492 | if (!strncmp(opr->name, "dword_", 6)) { |
493 | opr->lmod = OPLM_DWORD; |
494 | return 1; |
495 | } |
496 | if (!strncmp(opr->name, "word_", 5)) { |
497 | opr->lmod = OPLM_WORD; |
498 | return 1; |
499 | } |
500 | if (!strncmp(opr->name, "byte_", 5)) { |
501 | opr->lmod = OPLM_BYTE; |
502 | return 1; |
503 | } |
90307a99 |
504 | if (!strncmp(opr->name, "qword_", 6)) { |
505 | opr->lmod = OPLM_QWORD; |
506 | return 1; |
507 | } |
850c9265 |
508 | return 0; |
509 | } |
510 | |
3ebea2cf |
511 | static int guess_lmod_from_c_type(enum opr_lenmod *lmod, |
512 | const struct parsed_type *c_type) |
06c5d854 |
513 | { |
06c5d854 |
514 | static const char *dword_types[] = { |
da87ae38 |
515 | "int", "_DWORD", "UINT_PTR", "DWORD", |
4741fdfe |
516 | "WPARAM", "LPARAM", "UINT", "__int32", |
09bc6fd5 |
517 | "LONG", "HIMC", "BOOL", "size_t", |
feb0ee5d |
518 | "float", |
06c5d854 |
519 | }; |
520 | static const char *word_types[] = { |
fe18709a |
521 | "uint16_t", "int16_t", "_WORD", "WORD", |
2b43685d |
522 | "unsigned __int16", "__int16", |
06c5d854 |
523 | }; |
524 | static const char *byte_types[] = { |
2b43685d |
525 | "uint8_t", "int8_t", "char", |
89ff3147 |
526 | "unsigned __int8", "__int8", "BYTE", "_BYTE", |
4741fdfe |
527 | "CHAR", "_UNKNOWN", |
b4878d2b |
528 | // structures.. deal the same as with _UNKNOWN for now |
529 | "CRITICAL_SECTION", |
06c5d854 |
530 | }; |
3ebea2cf |
531 | const char *n; |
06c5d854 |
532 | int i; |
533 | |
3ebea2cf |
534 | if (c_type->is_ptr) { |
535 | *lmod = OPLM_DWORD; |
06c5d854 |
536 | return 1; |
537 | } |
538 | |
3ebea2cf |
539 | n = skip_type_mod(c_type->name); |
06c5d854 |
540 | |
3ebea2cf |
541 | for (i = 0; i < ARRAY_SIZE(dword_types); i++) { |
542 | if (IS(n, dword_types[i])) { |
543 | *lmod = OPLM_DWORD; |
06c5d854 |
544 | return 1; |
545 | } |
546 | } |
547 | |
548 | for (i = 0; i < ARRAY_SIZE(word_types); i++) { |
3ebea2cf |
549 | if (IS(n, word_types[i])) { |
550 | *lmod = OPLM_WORD; |
06c5d854 |
551 | return 1; |
552 | } |
553 | } |
554 | |
555 | for (i = 0; i < ARRAY_SIZE(byte_types); i++) { |
3ebea2cf |
556 | if (IS(n, byte_types[i])) { |
557 | *lmod = OPLM_BYTE; |
06c5d854 |
558 | return 1; |
559 | } |
560 | } |
561 | |
06c5d854 |
562 | return 0; |
563 | } |
564 | |
c7ed83dd |
565 | static char *default_cast_to(char *buf, size_t buf_size, |
566 | struct parsed_opr *opr) |
567 | { |
568 | buf[0] = 0; |
569 | |
570 | if (!opr->is_ptr) |
571 | return buf; |
572 | if (opr->pp == NULL || opr->pp->type.name == NULL |
573 | || opr->pp->is_fptr) |
574 | { |
575 | snprintf(buf, buf_size, "%s", "(void *)"); |
576 | return buf; |
577 | } |
578 | |
579 | snprintf(buf, buf_size, "(%s)", opr->pp->type.name); |
580 | return buf; |
581 | } |
582 | |
4c45fa73 |
583 | static enum opr_type lmod_from_directive(const char *d) |
584 | { |
585 | if (IS(d, "dd")) |
586 | return OPLM_DWORD; |
587 | else if (IS(d, "dw")) |
588 | return OPLM_WORD; |
589 | else if (IS(d, "db")) |
590 | return OPLM_BYTE; |
591 | |
592 | aerr("unhandled directive: '%s'\n", d); |
593 | return OPLM_UNSPEC; |
594 | } |
595 | |
5101a5f9 |
596 | static void setup_reg_opr(struct parsed_opr *opr, int reg, enum opr_lenmod lmod, |
597 | int *regmask) |
598 | { |
599 | opr->type = OPT_REG; |
600 | opr->reg = reg; |
601 | opr->lmod = lmod; |
602 | *regmask |= 1 << reg; |
603 | } |
604 | |
39b168b8 |
605 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
606 | int *extra_offs); |
87bf6cec |
607 | |
69a3cdfc |
608 | static int parse_operand(struct parsed_opr *opr, |
609 | int *regmask, int *regmask_indirect, |
1bafb621 |
610 | char words[16][256], int wordc, int w, unsigned int op_flags) |
c36e914d |
611 | { |
bd96f656 |
612 | const struct parsed_proto *pp; |
850c9265 |
613 | enum opr_lenmod tmplmod; |
63df67be |
614 | unsigned long number; |
89ff3147 |
615 | char buf[256]; |
850c9265 |
616 | int ret, len; |
1bafb621 |
617 | int wordc_in; |
89ff3147 |
618 | char *p; |
850c9265 |
619 | int i; |
c36e914d |
620 | |
1bafb621 |
621 | if (w >= wordc) |
622 | aerr("parse_operand w %d, wordc %d\n", w, wordc); |
c36e914d |
623 | |
1bafb621 |
624 | opr->reg = xUNSPEC; |
91977a1c |
625 | |
1bafb621 |
626 | for (i = w; i < wordc; i++) { |
627 | len = strlen(words[i]); |
628 | if (words[i][len - 1] == ',') { |
629 | words[i][len - 1] = 0; |
630 | wordc = i + 1; |
631 | break; |
632 | } |
633 | } |
c36e914d |
634 | |
1bafb621 |
635 | wordc_in = wordc - w; |
c36e914d |
636 | |
1bafb621 |
637 | if ((op_flags & OPF_JMP) && wordc_in > 0 |
638 | && !('0' <= words[w][0] && words[w][0] <= '9')) |
639 | { |
640 | const char *label = NULL; |
641 | |
642 | if (wordc_in == 3 && !strncmp(words[w], "near", 4) |
643 | && IS(words[w + 1], "ptr")) |
644 | label = words[w + 2]; |
645 | else if (wordc_in == 2 && IS(words[w], "short")) |
646 | label = words[w + 1]; |
647 | else if (wordc_in == 1 |
648 | && strchr(words[w], '[') == NULL |
649 | && parse_reg(&tmplmod, words[w]) < 0) |
650 | label = words[w]; |
651 | |
652 | if (label != NULL) { |
653 | opr->type = OPT_LABEL; |
fdd5548a |
654 | ret = check_segment_prefix(label); |
655 | if (ret != 0) { |
656 | if (ret >= 5) |
657 | aerr("fs/gs used\n"); |
ddaf8bd7 |
658 | opr->had_ds = 1; |
39b168b8 |
659 | label += 3; |
ddaf8bd7 |
660 | } |
1bafb621 |
661 | strcpy(opr->name, label); |
662 | return wordc; |
663 | } |
664 | } |
c36e914d |
665 | |
1bafb621 |
666 | if (wordc_in >= 3) { |
667 | if (IS(words[w + 1], "ptr")) { |
668 | if (IS(words[w], "dword")) |
669 | opr->lmod = OPLM_DWORD; |
670 | else if (IS(words[w], "word")) |
671 | opr->lmod = OPLM_WORD; |
672 | else if (IS(words[w], "byte")) |
673 | opr->lmod = OPLM_BYTE; |
90307a99 |
674 | else if (IS(words[w], "qword")) |
675 | opr->lmod = OPLM_QWORD; |
1bafb621 |
676 | else |
677 | aerr("type parsing failed\n"); |
678 | w += 2; |
679 | wordc_in = wordc - w; |
680 | } |
681 | } |
682 | |
39b168b8 |
683 | if (wordc_in == 2) { |
684 | if (IS(words[w], "offset")) { |
685 | opr->type = OPT_OFFSET; |
27ebfaed |
686 | opr->lmod = OPLM_DWORD; |
39b168b8 |
687 | strcpy(opr->name, words[w + 1]); |
27ebfaed |
688 | pp = proto_parse(g_fhdr, opr->name, 1); |
689 | goto do_label; |
39b168b8 |
690 | } |
691 | if (IS(words[w], "(offset")) { |
89ff3147 |
692 | p = strchr(words[w + 1], ')'); |
39b168b8 |
693 | if (p == NULL) |
694 | aerr("parse of bracketed offset failed\n"); |
695 | *p = 0; |
696 | opr->type = OPT_OFFSET; |
697 | strcpy(opr->name, words[w + 1]); |
698 | return wordc; |
699 | } |
1bafb621 |
700 | } |
c36e914d |
701 | |
1bafb621 |
702 | if (wordc_in != 1) |
850c9265 |
703 | aerr("parse_operand 1 word expected\n"); |
c36e914d |
704 | |
fdd5548a |
705 | ret = check_segment_prefix(words[w]); |
706 | if (ret != 0) { |
707 | if (ret >= 5) |
708 | aerr("fs/gs used\n"); |
ddaf8bd7 |
709 | opr->had_ds = 1; |
89ff3147 |
710 | memmove(words[w], words[w] + 3, strlen(words[w]) - 2); |
ddaf8bd7 |
711 | } |
89ff3147 |
712 | strcpy(opr->name, words[w]); |
c36e914d |
713 | |
850c9265 |
714 | if (words[w][0] == '[') { |
715 | opr->type = OPT_REGMEM; |
716 | ret = sscanf(words[w], "[%[^]]]", opr->name); |
717 | if (ret != 1) |
718 | aerr("[] parse failure\n"); |
87bf6cec |
719 | |
5101a5f9 |
720 | parse_indmode(opr->name, regmask_indirect, 1); |
09bc6fd5 |
721 | if (opr->lmod == OPLM_UNSPEC && parse_stack_el(opr->name, NULL, 1)) |
722 | { |
87bf6cec |
723 | // might be an equ |
d4e3b5db |
724 | struct parsed_equ *eq = |
09bc6fd5 |
725 | equ_find(NULL, parse_stack_el(opr->name, NULL, 1), &i); |
87bf6cec |
726 | if (eq) |
727 | opr->lmod = eq->lmod; |
728 | } |
850c9265 |
729 | return wordc; |
730 | } |
731 | else if (strchr(words[w], '[')) { |
732 | // label[reg] form |
89ff3147 |
733 | p = strchr(words[w], '['); |
850c9265 |
734 | opr->type = OPT_REGMEM; |
89ff3147 |
735 | parse_indmode(p, regmask_indirect, 0); |
736 | strncpy(buf, words[w], p - words[w]); |
737 | buf[p - words[w]] = 0; |
738 | pp = proto_parse(g_fhdr, buf, 1); |
739 | goto do_label; |
850c9265 |
740 | } |
741 | else if (('0' <= words[w][0] && words[w][0] <= '9') |
742 | || words[w][0] == '-') |
743 | { |
5101a5f9 |
744 | number = parse_number(words[w]); |
91977a1c |
745 | opr->type = OPT_CONST; |
5101a5f9 |
746 | opr->val = number; |
747 | printf_number(opr->name, sizeof(opr->name), number); |
91977a1c |
748 | return wordc; |
850c9265 |
749 | } |
c36e914d |
750 | |
5101a5f9 |
751 | ret = parse_reg(&tmplmod, opr->name); |
752 | if (ret >= 0) { |
753 | setup_reg_opr(opr, ret, tmplmod, regmask); |
850c9265 |
754 | return wordc; |
755 | } |
756 | |
757 | // most likely var in data segment |
758 | opr->type = OPT_LABEL; |
36595fd2 |
759 | pp = proto_parse(g_fhdr, opr->name, 0); |
89ff3147 |
760 | |
761 | do_label: |
bd96f656 |
762 | if (pp != NULL) { |
1cd4a663 |
763 | if (pp->is_fptr || pp->is_func) { |
06c5d854 |
764 | opr->lmod = OPLM_DWORD; |
765 | opr->is_ptr = 1; |
766 | } |
2b43685d |
767 | else { |
840257f6 |
768 | tmplmod = OPLM_UNSPEC; |
bd96f656 |
769 | if (!guess_lmod_from_c_type(&tmplmod, &pp->type)) |
2b43685d |
770 | anote("unhandled C type '%s' for '%s'\n", |
bd96f656 |
771 | pp->type.name, opr->name); |
2b43685d |
772 | |
a3684be1 |
773 | if (opr->lmod == OPLM_UNSPEC) { |
2b43685d |
774 | opr->lmod = tmplmod; |
a3684be1 |
775 | opr->type_from_var = 1; |
776 | } |
2b43685d |
777 | else if (opr->lmod != tmplmod) { |
778 | opr->size_mismatch = 1; |
779 | if (tmplmod < opr->lmod) |
780 | opr->size_lt = 1; |
781 | } |
a652aa9f |
782 | opr->is_ptr = pp->type.is_ptr; |
3ebea2cf |
783 | } |
bd96f656 |
784 | opr->is_array = pp->type.is_array; |
06c5d854 |
785 | } |
c7ed83dd |
786 | opr->pp = pp; |
06c5d854 |
787 | |
850c9265 |
788 | if (opr->lmod == OPLM_UNSPEC) |
789 | guess_lmod_from_name(opr); |
850c9265 |
790 | return wordc; |
c36e914d |
791 | } |
792 | |
33c35af6 |
793 | static const struct { |
794 | const char *name; |
795 | unsigned int flags; |
796 | } pref_table[] = { |
797 | { "rep", OPF_REP }, |
7ba45c34 |
798 | { "repe", OPF_REP|OPF_REPZ }, |
799 | { "repz", OPF_REP|OPF_REPZ }, |
800 | { "repne", OPF_REP|OPF_REPNZ }, |
801 | { "repnz", OPF_REP|OPF_REPNZ }, |
037f4971 |
802 | { "lock", OPF_LOCK }, // ignored for now.. |
33c35af6 |
803 | }; |
804 | |
5c024ef7 |
805 | #define OPF_CJMP_CC (OPF_JMP|OPF_CJMP|OPF_CC) |
806 | |
c36e914d |
807 | static const struct { |
850c9265 |
808 | const char *name; |
809 | enum op_op op; |
092f64e1 |
810 | unsigned short minopr; |
811 | unsigned short maxopr; |
69a3cdfc |
812 | unsigned int flags; |
092f64e1 |
813 | unsigned char pfo; |
814 | unsigned char pfo_inv; |
c36e914d |
815 | } op_table[] = { |
33c35af6 |
816 | { "nop", OP_NOP, 0, 0, 0 }, |
69a3cdfc |
817 | { "push", OP_PUSH, 1, 1, 0 }, |
818 | { "pop", OP_POP, 1, 1, OPF_DATA }, |
591721d7 |
819 | { "leave",OP_LEAVE, 0, 0, OPF_DATA }, |
69a3cdfc |
820 | { "mov" , OP_MOV, 2, 2, OPF_DATA }, |
821 | { "lea", OP_LEA, 2, 2, OPF_DATA }, |
822 | { "movzx",OP_MOVZX, 2, 2, OPF_DATA }, |
823 | { "movsx",OP_MOVSX, 2, 2, OPF_DATA }, |
108e9fe3 |
824 | { "xchg", OP_XCHG, 2, 2, OPF_DATA }, |
69a3cdfc |
825 | { "not", OP_NOT, 1, 1, OPF_DATA }, |
5101a5f9 |
826 | { "cdq", OP_CDQ, 0, 0, OPF_DATA }, |
092f64e1 |
827 | { "lodsb",OP_LODS, 0, 0, OPF_DATA }, |
828 | { "lodsw",OP_LODS, 0, 0, OPF_DATA }, |
829 | { "lodsd",OP_LODS, 0, 0, OPF_DATA }, |
33c35af6 |
830 | { "stosb",OP_STOS, 0, 0, OPF_DATA }, |
831 | { "stosw",OP_STOS, 0, 0, OPF_DATA }, |
832 | { "stosd",OP_STOS, 0, 0, OPF_DATA }, |
d4e3b5db |
833 | { "movsb",OP_MOVS, 0, 0, OPF_DATA }, |
834 | { "movsw",OP_MOVS, 0, 0, OPF_DATA }, |
835 | { "movsd",OP_MOVS, 0, 0, OPF_DATA }, |
7ba45c34 |
836 | { "cmpsb",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
837 | { "cmpsw",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
838 | { "cmpsd",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
591721d7 |
839 | { "scasb",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
840 | { "scasw",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
841 | { "scasd",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
842 | { "std", OP_STD, 0, 0, OPF_DATA }, // special flag |
843 | { "cld", OP_CLD, 0, 0, OPF_DATA }, |
69a3cdfc |
844 | { "add", OP_ADD, 2, 2, OPF_DATA|OPF_FLAGS }, |
845 | { "sub", OP_SUB, 2, 2, OPF_DATA|OPF_FLAGS }, |
846 | { "and", OP_AND, 2, 2, OPF_DATA|OPF_FLAGS }, |
847 | { "or", OP_OR, 2, 2, OPF_DATA|OPF_FLAGS }, |
848 | { "xor", OP_XOR, 2, 2, OPF_DATA|OPF_FLAGS }, |
849 | { "shl", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
850 | { "shr", OP_SHR, 2, 2, OPF_DATA|OPF_FLAGS }, |
851 | { "sal", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
852 | { "sar", OP_SAR, 2, 2, OPF_DATA|OPF_FLAGS }, |
3b2f4044 |
853 | { "shrd", OP_SHRD, 3, 3, OPF_DATA|OPF_FLAGS }, |
d4e3b5db |
854 | { "rol", OP_ROL, 2, 2, OPF_DATA|OPF_FLAGS }, |
855 | { "ror", OP_ROR, 2, 2, OPF_DATA|OPF_FLAGS }, |
092f64e1 |
856 | { "rcl", OP_RCL, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
857 | { "rcr", OP_RCR, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
858 | { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
859 | { "sbb", OP_SBB, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
1f84f6b3 |
860 | { "bsf", OP_BSF, 2, 2, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
861 | { "inc", OP_INC, 1, 1, OPF_DATA|OPF_FLAGS }, |
862 | { "dec", OP_DEC, 1, 1, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
863 | { "neg", OP_NEG, 1, 1, OPF_DATA|OPF_FLAGS }, |
864 | { "mul", OP_MUL, 1, 1, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
865 | { "imul", OP_IMUL, 1, 3, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
866 | { "div", OP_DIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
867 | { "idiv", OP_IDIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
868 | { "test", OP_TEST, 2, 2, OPF_FLAGS }, |
869 | { "cmp", OP_CMP, 2, 2, OPF_FLAGS }, |
a3684be1 |
870 | { "retn", OP_RET, 0, 1, OPF_TAIL }, |
de50b98b |
871 | { "call", OP_CALL, 1, 1, OPF_JMP|OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
872 | { "jmp", OP_JMP, 1, 1, OPF_JMP }, |
5c024ef7 |
873 | { "jecxz",OP_JECXZ, 1, 1, OPF_JMP|OPF_CJMP }, |
092f64e1 |
874 | { "jo", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_O, 0 }, // 70 OF=1 |
875 | { "jno", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_O, 1 }, // 71 OF=0 |
876 | { "jc", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 0 }, // 72 CF=1 |
877 | { "jb", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 0 }, // 72 |
878 | { "jnc", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 CF=0 |
879 | { "jnb", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 |
880 | { "jae", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 |
881 | { "jz", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 0 }, // 74 ZF=1 |
882 | { "je", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 0 }, // 74 |
883 | { "jnz", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 1 }, // 75 ZF=0 |
884 | { "jne", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 1 }, // 75 |
885 | { "jbe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 0 }, // 76 CF=1||ZF=1 |
886 | { "jna", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 0 }, // 76 |
887 | { "ja", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 1 }, // 77 CF=0&&ZF=0 |
888 | { "jnbe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 1 }, // 77 |
889 | { "js", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_S, 0 }, // 78 SF=1 |
890 | { "jns", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_S, 1 }, // 79 SF=0 |
891 | { "jp", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 0 }, // 7a PF=1 |
892 | { "jpe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 0 }, // 7a |
893 | { "jnp", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 1 }, // 7b PF=0 |
894 | { "jpo", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 1 }, // 7b |
895 | { "jl", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 0 }, // 7c SF!=OF |
896 | { "jnge", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 0 }, // 7c |
897 | { "jge", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 1 }, // 7d SF=OF |
898 | { "jnl", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 1 }, // 7d |
899 | { "jle", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 0 }, // 7e ZF=1||SF!=OF |
900 | { "jng", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 0 }, // 7e |
901 | { "jg", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 1 }, // 7f ZF=0&&SF=OF |
902 | { "jnle", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 1 }, // 7f |
903 | { "seto", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_O, 0 }, |
904 | { "setno", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_O, 1 }, |
905 | { "setc", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 0 }, |
906 | { "setb", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 0 }, |
907 | { "setnc", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
908 | { "setae", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
909 | { "setnb", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
910 | { "setz", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 0 }, |
911 | { "sete", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 0 }, |
912 | { "setnz", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 1 }, |
913 | { "setne", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 1 }, |
914 | { "setbe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 0 }, |
915 | { "setna", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 0 }, |
916 | { "seta", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 1 }, |
917 | { "setnbe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 1 }, |
918 | { "sets", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_S, 0 }, |
919 | { "setns", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_S, 1 }, |
920 | { "setp", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 0 }, |
921 | { "setpe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 0 }, |
922 | { "setnp", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 1 }, |
923 | { "setpo", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 1 }, |
924 | { "setl", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 0 }, |
925 | { "setnge", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 0 }, |
926 | { "setge", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 1 }, |
927 | { "setnl", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 1 }, |
928 | { "setle", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 0 }, |
929 | { "setng", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 0 }, |
930 | { "setg", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 }, |
931 | { "setnle", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 }, |
90307a99 |
932 | // x87 |
933 | // mmx |
934 | { "emms", OP_EMMS, 0, 0, OPF_DATA }, |
935 | { "movq", OP_MOV, 2, 2, OPF_DATA }, |
69a3cdfc |
936 | }; |
c36e914d |
937 | |
938 | static void parse_op(struct parsed_op *op, char words[16][256], int wordc) |
939 | { |
bfa4a6ee |
940 | enum opr_lenmod lmod = OPLM_UNSPEC; |
33c35af6 |
941 | int prefix_flags = 0; |
69a3cdfc |
942 | int regmask_ind; |
943 | int regmask; |
33c35af6 |
944 | int op_w = 0; |
91977a1c |
945 | int opr = 0; |
33c35af6 |
946 | int w = 0; |
91977a1c |
947 | int i; |
c36e914d |
948 | |
33c35af6 |
949 | for (i = 0; i < ARRAY_SIZE(pref_table); i++) { |
950 | if (IS(words[w], pref_table[i].name)) { |
951 | prefix_flags = pref_table[i].flags; |
952 | break; |
953 | } |
954 | } |
955 | |
956 | if (prefix_flags) { |
957 | if (wordc <= 1) |
958 | aerr("lone prefix: '%s'\n", words[0]); |
959 | w++; |
960 | } |
961 | |
962 | op_w = w; |
91977a1c |
963 | for (i = 0; i < ARRAY_SIZE(op_table); i++) { |
33c35af6 |
964 | if (IS(words[w], op_table[i].name)) |
69a3cdfc |
965 | break; |
966 | } |
c36e914d |
967 | |
69a3cdfc |
968 | if (i == ARRAY_SIZE(op_table)) |
969 | aerr("unhandled op: '%s'\n", words[0]); |
33c35af6 |
970 | w++; |
c36e914d |
971 | |
69a3cdfc |
972 | op->op = op_table[i].op; |
33c35af6 |
973 | op->flags = op_table[i].flags | prefix_flags; |
092f64e1 |
974 | op->pfo = op_table[i].pfo; |
975 | op->pfo_inv = op_table[i].pfo_inv; |
69a3cdfc |
976 | op->regmask_src = op->regmask_dst = 0; |
8eb12e72 |
977 | op->asmln = asmln; |
69a3cdfc |
978 | |
979 | for (opr = 0; opr < op_table[i].minopr; opr++) { |
980 | regmask = regmask_ind = 0; |
981 | w = parse_operand(&op->operand[opr], ®mask, ®mask_ind, |
982 | words, wordc, w, op->flags); |
983 | |
984 | if (opr == 0 && (op->flags & OPF_DATA)) |
985 | op->regmask_dst = regmask; |
986 | // for now, mark dst as src too |
987 | op->regmask_src |= regmask | regmask_ind; |
988 | } |
c36e914d |
989 | |
69a3cdfc |
990 | for (; w < wordc && opr < op_table[i].maxopr; opr++) { |
991 | w = parse_operand(&op->operand[opr], |
992 | &op->regmask_src, &op->regmask_src, |
993 | words, wordc, w, op->flags); |
91977a1c |
994 | } |
c36e914d |
995 | |
91977a1c |
996 | if (w < wordc) |
997 | aerr("parse_op %s incomplete: %d/%d\n", |
998 | words[0], w, wordc); |
5101a5f9 |
999 | |
1000 | // special cases |
1001 | op->operand_cnt = opr; |
1002 | if (!strncmp(op_table[i].name, "set", 3)) |
1003 | op->operand[0].lmod = OPLM_BYTE; |
1004 | |
1005 | // ops with implicit argumets |
1006 | switch (op->op) { |
1007 | case OP_CDQ: |
1008 | op->operand_cnt = 2; |
1009 | setup_reg_opr(&op->operand[0], xDX, OPLM_DWORD, &op->regmask_dst); |
1010 | setup_reg_opr(&op->operand[1], xAX, OPLM_DWORD, &op->regmask_src); |
1011 | break; |
1012 | |
092f64e1 |
1013 | case OP_LODS: |
33c35af6 |
1014 | case OP_STOS: |
591721d7 |
1015 | case OP_SCAS: |
33c35af6 |
1016 | if (op->operand_cnt != 0) |
1017 | break; |
591721d7 |
1018 | if (words[op_w][4] == 'b') |
33c35af6 |
1019 | lmod = OPLM_BYTE; |
591721d7 |
1020 | else if (words[op_w][4] == 'w') |
33c35af6 |
1021 | lmod = OPLM_WORD; |
591721d7 |
1022 | else if (words[op_w][4] == 'd') |
33c35af6 |
1023 | lmod = OPLM_DWORD; |
1024 | op->operand_cnt = 3; |
092f64e1 |
1025 | setup_reg_opr(&op->operand[0], op->op == OP_LODS ? xSI : xDI, |
1026 | lmod, &op->regmask_src); |
d4e3b5db |
1027 | setup_reg_opr(&op->operand[1], xCX, OPLM_DWORD, &op->regmask_src); |
1028 | op->regmask_dst = op->regmask_src; |
092f64e1 |
1029 | setup_reg_opr(&op->operand[2], xAX, OPLM_DWORD, |
1030 | op->op == OP_LODS ? &op->regmask_dst : &op->regmask_src); |
33c35af6 |
1031 | break; |
1032 | |
d4e3b5db |
1033 | case OP_MOVS: |
7ba45c34 |
1034 | case OP_CMPS: |
d4e3b5db |
1035 | if (op->operand_cnt != 0) |
1036 | break; |
7ba45c34 |
1037 | if (words[op_w][4] == 'b') |
d4e3b5db |
1038 | lmod = OPLM_BYTE; |
7ba45c34 |
1039 | else if (words[op_w][4] == 'w') |
d4e3b5db |
1040 | lmod = OPLM_WORD; |
7ba45c34 |
1041 | else if (words[op_w][4] == 'd') |
d4e3b5db |
1042 | lmod = OPLM_DWORD; |
1043 | op->operand_cnt = 3; |
1044 | setup_reg_opr(&op->operand[0], xDI, lmod, &op->regmask_src); |
1045 | setup_reg_opr(&op->operand[1], xSI, OPLM_DWORD, &op->regmask_src); |
1046 | setup_reg_opr(&op->operand[2], xCX, OPLM_DWORD, &op->regmask_src); |
1047 | op->regmask_dst = op->regmask_src; |
1048 | break; |
1049 | |
108e9fe3 |
1050 | case OP_XCHG: |
1051 | op->regmask_src |= op->regmask_dst; |
1052 | op->regmask_dst |= op->regmask_src; |
092f64e1 |
1053 | goto check_align; |
108e9fe3 |
1054 | |
5c024ef7 |
1055 | case OP_JECXZ: |
1056 | op->operand_cnt = 1; |
1057 | op->regmask_src = 1 << xCX; |
1058 | op->operand[0].type = OPT_REG; |
1059 | op->operand[0].reg = xCX; |
1060 | op->operand[0].lmod = OPLM_DWORD; |
1061 | break; |
1062 | |
5101a5f9 |
1063 | case OP_IMUL: |
1064 | if (op->operand_cnt != 1) |
1065 | break; |
1066 | // fallthrough |
1067 | case OP_MUL: |
1068 | // singleop mul |
1069 | op->regmask_dst = (1 << xDX) | (1 << xAX); |
1070 | op->regmask_src |= (1 << xAX); |
1071 | if (op->operand[0].lmod == OPLM_UNSPEC) |
1072 | op->operand[0].lmod = OPLM_DWORD; |
1073 | break; |
1074 | |
1075 | case OP_DIV: |
1076 | case OP_IDIV: |
1077 | // we could set up operands for edx:eax, but there is no real need to |
1078 | // (see is_opr_modified()) |
1079 | regmask = (1 << xDX) | (1 << xAX); |
1080 | op->regmask_dst = regmask; |
1081 | op->regmask_src |= regmask; |
1082 | if (op->operand[0].lmod == OPLM_UNSPEC) |
1083 | op->operand[0].lmod = OPLM_DWORD; |
1084 | break; |
1085 | |
1086 | case OP_SHL: |
1087 | case OP_SHR: |
1088 | case OP_SAR: |
d4e3b5db |
1089 | case OP_ROL: |
1090 | case OP_ROR: |
5101a5f9 |
1091 | if (op->operand[1].lmod == OPLM_UNSPEC) |
1092 | op->operand[1].lmod = OPLM_BYTE; |
1093 | break; |
1094 | |
3b2f4044 |
1095 | case OP_SHRD: |
1096 | if (op->operand[2].lmod == OPLM_UNSPEC) |
1097 | op->operand[2].lmod = OPLM_BYTE; |
1098 | break; |
1099 | |
7ba45c34 |
1100 | case OP_PUSH: |
1101 | if (op->operand[0].lmod == OPLM_UNSPEC |
1102 | && (op->operand[0].type == OPT_CONST |
1103 | || op->operand[0].type == OPT_OFFSET |
1104 | || op->operand[0].type == OPT_LABEL)) |
1105 | op->operand[0].lmod = OPLM_DWORD; |
1106 | break; |
1107 | |
3ebea2cf |
1108 | // alignment |
1109 | case OP_MOV: |
092f64e1 |
1110 | check_align: |
3ebea2cf |
1111 | if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG |
092f64e1 |
1112 | && op->operand[0].lmod == op->operand[1].lmod |
1113 | && op->operand[0].reg == op->operand[1].reg |
1114 | && IS(op->operand[0].name, op->operand[1].name)) // ah, al.. |
3ebea2cf |
1115 | { |
1116 | op->flags |= OPF_RMD; |
092f64e1 |
1117 | op->regmask_src = op->regmask_dst = 0; |
3ebea2cf |
1118 | } |
1119 | break; |
1120 | |
de50b98b |
1121 | case OP_LEA: |
1122 | if (op->operand[0].type == OPT_REG |
1123 | && op->operand[1].type == OPT_REGMEM) |
1124 | { |
1125 | char buf[16]; |
1126 | snprintf(buf, sizeof(buf), "%s+0", op->operand[0].name); |
1127 | if (IS(buf, op->operand[1].name)) |
1128 | op->flags |= OPF_RMD; |
1129 | } |
1130 | break; |
1131 | |
89ff3147 |
1132 | case OP_CALL: |
1133 | // trashed regs must be explicitly detected later |
1134 | op->regmask_dst = 0; |
1135 | break; |
1136 | |
5101a5f9 |
1137 | default: |
1138 | break; |
1139 | } |
c36e914d |
1140 | } |
1141 | |
092f64e1 |
1142 | static const char *op_name(struct parsed_op *po) |
850c9265 |
1143 | { |
092f64e1 |
1144 | static char buf[16]; |
1145 | char *p; |
850c9265 |
1146 | int i; |
1147 | |
092f64e1 |
1148 | if (po->op == OP_JCC || po->op == OP_SCC) { |
1149 | p = buf; |
1150 | *p++ = (po->op == OP_JCC) ? 'j' : 's'; |
1151 | if (po->pfo_inv) |
1152 | *p++ = 'n'; |
1153 | strcpy(p, parsed_flag_op_names[po->pfo]); |
1154 | return buf; |
1155 | } |
1156 | |
850c9265 |
1157 | for (i = 0; i < ARRAY_SIZE(op_table); i++) |
092f64e1 |
1158 | if (op_table[i].op == po->op) |
850c9265 |
1159 | return op_table[i].name; |
1160 | |
1161 | return "???"; |
1162 | } |
1163 | |
1164 | // debug |
1165 | static const char *dump_op(struct parsed_op *po) |
1166 | { |
1167 | static char out[128]; |
1168 | char *p = out; |
1169 | int i; |
1170 | |
4c45fa73 |
1171 | if (po == NULL) |
1172 | return "???"; |
1173 | |
092f64e1 |
1174 | snprintf(out, sizeof(out), "%s", op_name(po)); |
850c9265 |
1175 | for (i = 0; i < po->operand_cnt; i++) { |
1176 | p += strlen(p); |
1177 | if (i > 0) |
1178 | *p++ = ','; |
1179 | snprintf(p, sizeof(out) - (p - out), |
1180 | po->operand[i].type == OPT_REGMEM ? " [%s]" : " %s", |
1181 | po->operand[i].name); |
1182 | } |
1183 | |
1184 | return out; |
1185 | } |
1186 | |
4c45fa73 |
1187 | static const char *lmod_type_u(struct parsed_op *po, |
1188 | enum opr_lenmod lmod) |
1189 | { |
1190 | switch (lmod) { |
90307a99 |
1191 | case OPLM_QWORD: |
1192 | return "u64"; |
4c45fa73 |
1193 | case OPLM_DWORD: |
1194 | return "u32"; |
1195 | case OPLM_WORD: |
1196 | return "u16"; |
1197 | case OPLM_BYTE: |
1198 | return "u8"; |
1199 | default: |
1200 | ferr(po, "invalid lmod: %d\n", lmod); |
1201 | return "(_invalid_)"; |
1202 | } |
1203 | } |
1204 | |
d4e3b5db |
1205 | static const char *lmod_cast_u(struct parsed_op *po, |
1206 | enum opr_lenmod lmod) |
1207 | { |
1208 | switch (lmod) { |
90307a99 |
1209 | case OPLM_QWORD: |
1210 | return ""; |
d4e3b5db |
1211 | case OPLM_DWORD: |
1212 | return ""; |
1213 | case OPLM_WORD: |
1214 | return "(u16)"; |
1215 | case OPLM_BYTE: |
1216 | return "(u8)"; |
1217 | default: |
1218 | ferr(po, "invalid lmod: %d\n", lmod); |
1219 | return "(_invalid_)"; |
1220 | } |
1221 | } |
1222 | |
1223 | static const char *lmod_cast_u_ptr(struct parsed_op *po, |
1224 | enum opr_lenmod lmod) |
1225 | { |
1226 | switch (lmod) { |
90307a99 |
1227 | case OPLM_QWORD: |
1228 | return "*(u64 *)"; |
d4e3b5db |
1229 | case OPLM_DWORD: |
1230 | return "*(u32 *)"; |
1231 | case OPLM_WORD: |
1232 | return "*(u16 *)"; |
1233 | case OPLM_BYTE: |
1234 | return "*(u8 *)"; |
1235 | default: |
1236 | ferr(po, "invalid lmod: %d\n", lmod); |
1237 | return "(_invalid_)"; |
1238 | } |
1239 | } |
1240 | |
1241 | static const char *lmod_cast_s(struct parsed_op *po, |
1242 | enum opr_lenmod lmod) |
1243 | { |
1244 | switch (lmod) { |
90307a99 |
1245 | case OPLM_QWORD: |
1246 | return "(s64)"; |
d4e3b5db |
1247 | case OPLM_DWORD: |
1248 | return "(s32)"; |
1249 | case OPLM_WORD: |
1250 | return "(s16)"; |
1251 | case OPLM_BYTE: |
1252 | return "(s8)"; |
1253 | default: |
1254 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
1255 | return "(_invalid_)"; |
1256 | } |
1257 | } |
1258 | |
1259 | static const char *lmod_cast(struct parsed_op *po, |
1260 | enum opr_lenmod lmod, int is_signed) |
1261 | { |
1262 | return is_signed ? |
1263 | lmod_cast_s(po, lmod) : |
1264 | lmod_cast_u(po, lmod); |
1265 | } |
1266 | |
1267 | static int lmod_bytes(struct parsed_op *po, enum opr_lenmod lmod) |
1268 | { |
1269 | switch (lmod) { |
90307a99 |
1270 | case OPLM_QWORD: |
1271 | return 8; |
d4e3b5db |
1272 | case OPLM_DWORD: |
1273 | return 4; |
1274 | case OPLM_WORD: |
1275 | return 2; |
1276 | case OPLM_BYTE: |
1277 | return 1; |
1278 | default: |
1279 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
1280 | return 0; |
1281 | } |
1282 | } |
1283 | |
91977a1c |
1284 | static const char *opr_name(struct parsed_op *po, int opr_num) |
c36e914d |
1285 | { |
91977a1c |
1286 | if (opr_num >= po->operand_cnt) |
1287 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
1288 | return po->operand[opr_num].name; |
c36e914d |
1289 | } |
1290 | |
91977a1c |
1291 | static unsigned int opr_const(struct parsed_op *po, int opr_num) |
c36e914d |
1292 | { |
91977a1c |
1293 | if (opr_num >= po->operand_cnt) |
1294 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
1295 | if (po->operand[opr_num].type != OPT_CONST) |
1296 | ferr(po, "opr %d: const expected\n", opr_num); |
1297 | return po->operand[opr_num].val; |
1298 | } |
c36e914d |
1299 | |
91977a1c |
1300 | static const char *opr_reg_p(struct parsed_op *po, struct parsed_opr *popr) |
1301 | { |
90307a99 |
1302 | if ((unsigned int)popr->reg >= ARRAY_SIZE(regs_r32)) |
91977a1c |
1303 | ferr(po, "invalid reg: %d\n", popr->reg); |
1304 | return regs_r32[popr->reg]; |
1305 | } |
c36e914d |
1306 | |
a2c1d768 |
1307 | // cast1 is the "final" cast |
1308 | static const char *simplify_cast(const char *cast1, const char *cast2) |
1309 | { |
1310 | static char buf[256]; |
1311 | |
1312 | if (cast1[0] == 0) |
1313 | return cast2; |
1314 | if (cast2[0] == 0) |
1315 | return cast1; |
1316 | if (IS(cast1, cast2)) |
1317 | return cast1; |
1318 | if (IS(cast1, "(s8)") && IS(cast2, "(u8)")) |
1319 | return cast1; |
1320 | if (IS(cast1, "(s16)") && IS(cast2, "(u16)")) |
1321 | return cast1; |
1322 | if (IS(cast1, "(u8)") && IS_START(cast2, "*(u8 *)")) |
1323 | return cast2; |
1324 | if (IS(cast1, "(u16)") && IS_START(cast2, "*(u16 *)")) |
1325 | return cast2; |
1cd4a663 |
1326 | if (strchr(cast1, '*') && IS_START(cast2, "(u32)")) |
1327 | return cast1; |
a2c1d768 |
1328 | |
1329 | snprintf(buf, sizeof(buf), "%s%s", cast1, cast2); |
1330 | return buf; |
1331 | } |
1332 | |
1333 | static const char *simplify_cast_num(const char *cast, unsigned int val) |
1334 | { |
1335 | if (IS(cast, "(u8)") && val < 0x100) |
1336 | return ""; |
1337 | if (IS(cast, "(s8)") && val < 0x80) |
1338 | return ""; |
1339 | if (IS(cast, "(u16)") && val < 0x10000) |
1340 | return ""; |
1341 | if (IS(cast, "(s16)") && val < 0x8000) |
1342 | return ""; |
1343 | if (IS(cast, "(s32)") && val < 0x80000000) |
1344 | return ""; |
1345 | |
1346 | return cast; |
1347 | } |
1348 | |
39b168b8 |
1349 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
1350 | int *extra_offs) |
91977a1c |
1351 | { |
39b168b8 |
1352 | const char *p; |
1353 | char *endp; |
1354 | int namelen; |
850c9265 |
1355 | int i; |
1356 | |
39b168b8 |
1357 | *extra_offs = 0; |
1358 | namelen = strlen(name); |
1359 | |
1360 | p = strchr(name, '+'); |
1361 | if (p != NULL) { |
1362 | namelen = p - name; |
1363 | if (namelen <= 0) |
1364 | ferr(po, "equ parse failed for '%s'\n", name); |
1365 | |
1366 | if (IS_START(p, "0x")) |
1367 | p += 2; |
1368 | *extra_offs = strtol(p, &endp, 16); |
1369 | if (*endp != 0) |
1370 | ferr(po, "equ parse failed for '%s'\n", name); |
1371 | } |
1372 | |
850c9265 |
1373 | for (i = 0; i < g_eqcnt; i++) |
39b168b8 |
1374 | if (strncmp(g_eqs[i].name, name, namelen) == 0 |
1375 | && g_eqs[i].name[namelen] == 0) |
850c9265 |
1376 | break; |
87bf6cec |
1377 | if (i >= g_eqcnt) { |
1378 | if (po != NULL) |
1379 | ferr(po, "unresolved equ name: '%s'\n", name); |
1380 | return NULL; |
1381 | } |
850c9265 |
1382 | |
1383 | return &g_eqs[i]; |
1384 | } |
1385 | |
1cd4a663 |
1386 | static int is_stack_access(struct parsed_op *po, |
1387 | const struct parsed_opr *popr) |
850c9265 |
1388 | { |
09bc6fd5 |
1389 | return (parse_stack_el(popr->name, NULL, 0) |
1cd4a663 |
1390 | || (g_bp_frame && !(po->flags & OPF_EBP_S) |
1391 | && IS_START(popr->name, "ebp"))); |
1392 | } |
1393 | |
1394 | static void parse_stack_access(struct parsed_op *po, |
1395 | const char *name, char *ofs_reg, int *offset_out, |
037f4971 |
1396 | int *stack_ra_out, const char **bp_arg_out, int is_lea) |
1cd4a663 |
1397 | { |
1398 | const char *bp_arg = ""; |
1399 | const char *p = NULL; |
91977a1c |
1400 | struct parsed_equ *eq; |
4f12f671 |
1401 | char *endp = NULL; |
d4e3b5db |
1402 | int stack_ra = 0; |
39b168b8 |
1403 | int offset = 0; |
91977a1c |
1404 | |
1cd4a663 |
1405 | ofs_reg[0] = 0; |
a3684be1 |
1406 | |
1407 | if (IS_START(name, "ebp-") |
1408 | || (IS_START(name, "ebp+") && '0' <= name[4] && name[4] <= '9')) |
1409 | { |
1410 | p = name + 4; |
1411 | if (IS_START(p, "0x")) |
1412 | p += 2; |
1413 | offset = strtoul(p, &endp, 16); |
1414 | if (name[3] == '-') |
1415 | offset = -offset; |
1416 | if (*endp != 0) |
1417 | ferr(po, "ebp- parse of '%s' failed\n", name); |
1418 | } |
1419 | else { |
09bc6fd5 |
1420 | bp_arg = parse_stack_el(name, ofs_reg, 0); |
4f12f671 |
1421 | snprintf(g_comment, sizeof(g_comment), "%s", bp_arg); |
1422 | eq = equ_find(po, bp_arg, &offset); |
1423 | if (eq == NULL) |
1424 | ferr(po, "detected but missing eq\n"); |
1425 | offset += eq->offset; |
1426 | } |
39b168b8 |
1427 | |
d4e3b5db |
1428 | if (!strncmp(name, "ebp", 3)) |
1429 | stack_ra = 4; |
1430 | |
037f4971 |
1431 | // yes it sometimes LEAs ra for compares.. |
1432 | if (!is_lea && ofs_reg[0] == 0 |
1433 | && stack_ra <= offset && offset < stack_ra + 4) |
1434 | { |
39b168b8 |
1435 | ferr(po, "reference to ra? %d %d\n", offset, stack_ra); |
037f4971 |
1436 | } |
d4e3b5db |
1437 | |
1cd4a663 |
1438 | *offset_out = offset; |
1439 | *stack_ra_out = stack_ra; |
1440 | if (bp_arg_out) |
1441 | *bp_arg_out = bp_arg; |
1442 | } |
1443 | |
5f70a34f |
1444 | static int stack_frame_access(struct parsed_op *po, |
1cd4a663 |
1445 | struct parsed_opr *popr, char *buf, size_t buf_size, |
1446 | const char *name, const char *cast, int is_src, int is_lea) |
1447 | { |
1448 | enum opr_lenmod tmp_lmod = OPLM_UNSPEC; |
1449 | const char *prefix = ""; |
1450 | const char *bp_arg = NULL; |
1451 | char ofs_reg[16] = { 0, }; |
1452 | int i, arg_i, arg_s; |
1453 | int unaligned = 0; |
1454 | int stack_ra = 0; |
1455 | int offset = 0; |
5f70a34f |
1456 | int retval = -1; |
1cd4a663 |
1457 | int sf_ofs; |
1458 | int lim; |
1459 | |
1460 | if (po->flags & OPF_EBP_S) |
1461 | ferr(po, "stack_frame_access while ebp is scratch\n"); |
1462 | |
037f4971 |
1463 | parse_stack_access(po, name, ofs_reg, &offset, |
1464 | &stack_ra, &bp_arg, is_lea); |
1cd4a663 |
1465 | |
4f12f671 |
1466 | if (offset > stack_ra) |
1467 | { |
39b168b8 |
1468 | arg_i = (offset - stack_ra - 4) / 4; |
bd96f656 |
1469 | if (arg_i < 0 || arg_i >= g_func_pp->argc_stack) |
4f12f671 |
1470 | { |
bd96f656 |
1471 | if (g_func_pp->is_vararg |
1472 | && arg_i == g_func_pp->argc_stack && is_lea) |
1473 | { |
4f12f671 |
1474 | // should be va_list |
1475 | if (cast[0] == 0) |
1476 | cast = "(u32)"; |
1477 | snprintf(buf, buf_size, "%sap", cast); |
5f70a34f |
1478 | return -1; |
4f12f671 |
1479 | } |
1480 | ferr(po, "offset %d (%s,%d) doesn't map to any arg\n", |
1481 | offset, bp_arg, arg_i); |
1482 | } |
4c45fa73 |
1483 | if (ofs_reg[0] != 0) |
7ba45c34 |
1484 | ferr(po, "offset reg on arg access?\n"); |
91977a1c |
1485 | |
bd96f656 |
1486 | for (i = arg_s = 0; i < g_func_pp->argc; i++) { |
1487 | if (g_func_pp->arg[i].reg != NULL) |
91977a1c |
1488 | continue; |
1489 | if (arg_s == arg_i) |
1490 | break; |
1491 | arg_s++; |
1492 | } |
bd96f656 |
1493 | if (i == g_func_pp->argc) |
91977a1c |
1494 | ferr(po, "arg %d not in prototype?\n", arg_i); |
850c9265 |
1495 | |
bd96f656 |
1496 | popr->is_ptr = g_func_pp->arg[i].type.is_ptr; |
5f70a34f |
1497 | retval = i; |
de50b98b |
1498 | |
1499 | switch (popr->lmod) |
7ba45c34 |
1500 | { |
1501 | case OPLM_BYTE: |
4f12f671 |
1502 | if (is_lea) |
1503 | ferr(po, "lea/byte to arg?\n"); |
7ba45c34 |
1504 | if (is_src && (offset & 3) == 0) |
a2c1d768 |
1505 | snprintf(buf, buf_size, "%sa%d", |
1506 | simplify_cast(cast, "(u8)"), i + 1); |
7ba45c34 |
1507 | else |
a2c1d768 |
1508 | snprintf(buf, buf_size, "%sBYTE%d(a%d)", |
1509 | cast, offset & 3, i + 1); |
7ba45c34 |
1510 | break; |
1511 | |
1512 | case OPLM_WORD: |
4f12f671 |
1513 | if (is_lea) |
1514 | ferr(po, "lea/word to arg?\n"); |
a3684be1 |
1515 | if (offset & 1) { |
1516 | unaligned = 1; |
1517 | if (!is_src) { |
1518 | if (offset & 2) |
1519 | ferr(po, "problematic arg store\n"); |
a2c1d768 |
1520 | snprintf(buf, buf_size, "%s((char *)&a%d + 1)", |
1521 | simplify_cast(cast, "*(u16 *)"), i + 1); |
a3684be1 |
1522 | } |
1523 | else |
1524 | ferr(po, "unaligned arg word load\n"); |
1525 | } |
1526 | else if (is_src && (offset & 2) == 0) |
a2c1d768 |
1527 | snprintf(buf, buf_size, "%sa%d", |
1528 | simplify_cast(cast, "(u16)"), i + 1); |
7ba45c34 |
1529 | else |
a2c1d768 |
1530 | snprintf(buf, buf_size, "%s%sWORD(a%d)", |
1531 | cast, (offset & 2) ? "HI" : "LO", i + 1); |
7ba45c34 |
1532 | break; |
1533 | |
1534 | case OPLM_DWORD: |
3ebea2cf |
1535 | if (cast[0]) |
1536 | prefix = cast; |
1537 | else if (is_src) |
1538 | prefix = "(u32)"; |
a3684be1 |
1539 | |
de50b98b |
1540 | if (offset & 3) { |
a3684be1 |
1541 | unaligned = 1; |
2b43685d |
1542 | if (is_lea) |
1543 | snprintf(buf, buf_size, "(u32)&a%d + %d", |
1544 | i + 1, offset & 3); |
a3684be1 |
1545 | else if (!is_src) |
1546 | ferr(po, "unaligned arg store\n"); |
1547 | else { |
1548 | // mov edx, [ebp+arg_4+2]; movsx ecx, dx |
2b43685d |
1549 | snprintf(buf, buf_size, "%s(a%d >> %d)", |
1550 | prefix, i + 1, (offset & 3) * 8); |
a3684be1 |
1551 | } |
de50b98b |
1552 | } |
1553 | else { |
1554 | snprintf(buf, buf_size, "%s%sa%d", |
1555 | prefix, is_lea ? "&" : "", i + 1); |
1556 | } |
7ba45c34 |
1557 | break; |
1558 | |
1559 | default: |
de50b98b |
1560 | ferr(po, "bp_arg bad lmod: %d\n", popr->lmod); |
7ba45c34 |
1561 | } |
1562 | |
a3684be1 |
1563 | if (unaligned) |
1564 | snprintf(g_comment, sizeof(g_comment), "%s unaligned", bp_arg); |
1565 | |
7ba45c34 |
1566 | // common problem |
bd96f656 |
1567 | guess_lmod_from_c_type(&tmp_lmod, &g_func_pp->arg[i].type); |
a2c1d768 |
1568 | if (tmp_lmod != OPLM_DWORD |
de041e5b |
1569 | && (unaligned || (!is_src && lmod_bytes(po, tmp_lmod) |
1570 | < lmod_bytes(po, popr->lmod) + (offset & 3)))) |
a2c1d768 |
1571 | { |
1572 | ferr(po, "bp_arg arg%d/w offset %d and type '%s' is too small\n", |
1573 | i + 1, offset, g_func_pp->arg[i].type.name); |
1574 | } |
4741fdfe |
1575 | // can't check this because msvc likes to reuse |
1576 | // arg space for scratch.. |
1577 | //if (popr->is_ptr && popr->lmod != OPLM_DWORD) |
1578 | // ferr(po, "bp_arg arg%d: non-dword ptr access\n", i + 1); |
91977a1c |
1579 | } |
4f12f671 |
1580 | else |
1581 | { |
1bafb621 |
1582 | if (g_stack_fsz == 0) |
1583 | ferr(po, "stack var access without stackframe\n"); |
a2c1d768 |
1584 | g_stack_frame_used = 1; |
850c9265 |
1585 | |
39b168b8 |
1586 | sf_ofs = g_stack_fsz + offset; |
de50b98b |
1587 | lim = (ofs_reg[0] != 0) ? -4 : 0; |
1588 | if (offset > 0 || sf_ofs < lim) |
39b168b8 |
1589 | ferr(po, "bp_stack offset %d/%d\n", offset, g_stack_fsz); |
850c9265 |
1590 | |
1591 | if (is_lea) |
33c35af6 |
1592 | prefix = "(u32)&"; |
3ebea2cf |
1593 | else |
1594 | prefix = cast; |
850c9265 |
1595 | |
de50b98b |
1596 | switch (popr->lmod) |
850c9265 |
1597 | { |
1598 | case OPLM_BYTE: |
7ba45c34 |
1599 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1600 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
850c9265 |
1601 | break; |
7ba45c34 |
1602 | |
850c9265 |
1603 | case OPLM_WORD: |
7ba45c34 |
1604 | if ((sf_ofs & 1) || ofs_reg[0] != 0) { |
1605 | // known unaligned or possibly unaligned |
1606 | strcat(g_comment, " unaligned"); |
1607 | if (prefix[0] == 0) |
1608 | prefix = "*(u16 *)&"; |
1609 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1610 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
1611 | break; |
1612 | } |
1613 | snprintf(buf, buf_size, "%ssf.w[%d]", prefix, sf_ofs / 2); |
850c9265 |
1614 | break; |
7ba45c34 |
1615 | |
850c9265 |
1616 | case OPLM_DWORD: |
7ba45c34 |
1617 | if ((sf_ofs & 3) || ofs_reg[0] != 0) { |
1618 | // known unaligned or possibly unaligned |
1619 | strcat(g_comment, " unaligned"); |
1620 | if (prefix[0] == 0) |
1621 | prefix = "*(u32 *)&"; |
1622 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1623 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
1624 | break; |
1625 | } |
1626 | snprintf(buf, buf_size, "%ssf.d[%d]", prefix, sf_ofs / 4); |
850c9265 |
1627 | break; |
7ba45c34 |
1628 | |
850c9265 |
1629 | default: |
de50b98b |
1630 | ferr(po, "bp_stack bad lmod: %d\n", popr->lmod); |
850c9265 |
1631 | } |
91977a1c |
1632 | } |
5f70a34f |
1633 | |
1634 | return retval; |
91977a1c |
1635 | } |
c36e914d |
1636 | |
89ff3147 |
1637 | static void check_func_pp(struct parsed_op *po, |
1638 | const struct parsed_proto *pp, const char *pfx) |
1639 | { |
179b79a9 |
1640 | enum opr_lenmod tmp_lmod; |
b74c31e3 |
1641 | char buf[256]; |
179b79a9 |
1642 | int ret, i; |
b74c31e3 |
1643 | |
89ff3147 |
1644 | if (pp->argc_reg != 0) { |
b74c31e3 |
1645 | if (/*!g_allow_regfunc &&*/ !pp->is_fastcall) { |
1646 | pp_print(buf, sizeof(buf), pp); |
1647 | ferr(po, "%s: unexpected reg arg in icall: %s\n", pfx, buf); |
1648 | } |
89ff3147 |
1649 | if (pp->argc_stack > 0 && pp->argc_reg != 2) |
1650 | ferr(po, "%s: %d reg arg(s) with %d stack arg(s)\n", |
1651 | pfx, pp->argc_reg, pp->argc_stack); |
1652 | } |
179b79a9 |
1653 | |
1654 | // fptrs must use 32bit args, callsite might have no information and |
1655 | // lack a cast to smaller types, which results in incorrectly masked |
1656 | // args passed (callee may assume masked args, it does on ARM) |
1657 | if (!pp->is_oslib) { |
1658 | for (i = 0; i < pp->argc; i++) { |
1659 | ret = guess_lmod_from_c_type(&tmp_lmod, &pp->arg[i].type); |
1660 | if (ret && tmp_lmod != OPLM_DWORD) |
1661 | ferr(po, "reference to %s with arg%d '%s'\n", pp->name, |
1662 | i + 1, pp->arg[i].type.name); |
1663 | } |
1664 | } |
89ff3147 |
1665 | } |
1666 | |
7aca4698 |
1667 | static const char *check_label_read_ref(struct parsed_op *po, |
1668 | const char *name) |
3ebea2cf |
1669 | { |
840257f6 |
1670 | const struct parsed_proto *pp; |
1671 | |
36595fd2 |
1672 | pp = proto_parse(g_fhdr, name, 0); |
840257f6 |
1673 | if (pp == NULL) |
1674 | ferr(po, "proto_parse failed for ref '%s'\n", name); |
1675 | |
89ff3147 |
1676 | if (pp->is_func) |
1677 | check_func_pp(po, pp, "ref"); |
7aca4698 |
1678 | |
1679 | return pp->name; |
3ebea2cf |
1680 | } |
1681 | |
91977a1c |
1682 | static char *out_src_opr(char *buf, size_t buf_size, |
591721d7 |
1683 | struct parsed_op *po, struct parsed_opr *popr, const char *cast, |
3ebea2cf |
1684 | int is_lea) |
91977a1c |
1685 | { |
850c9265 |
1686 | char tmp1[256], tmp2[256]; |
1687 | char expr[256]; |
7aca4698 |
1688 | const char *name; |
a2c1d768 |
1689 | char *p; |
850c9265 |
1690 | int ret; |
1691 | |
3ebea2cf |
1692 | if (cast == NULL) |
1693 | cast = ""; |
1694 | |
91977a1c |
1695 | switch (popr->type) { |
1696 | case OPT_REG: |
850c9265 |
1697 | if (is_lea) |
1698 | ferr(po, "lea from reg?\n"); |
1699 | |
91977a1c |
1700 | switch (popr->lmod) { |
90307a99 |
1701 | case OPLM_QWORD: |
1702 | snprintf(buf, buf_size, "%s%s.q", cast, opr_reg_p(po, popr)); |
1703 | break; |
91977a1c |
1704 | case OPLM_DWORD: |
3ebea2cf |
1705 | snprintf(buf, buf_size, "%s%s", cast, opr_reg_p(po, popr)); |
91977a1c |
1706 | break; |
850c9265 |
1707 | case OPLM_WORD: |
a2c1d768 |
1708 | snprintf(buf, buf_size, "%s%s", |
1709 | simplify_cast(cast, "(u16)"), opr_reg_p(po, popr)); |
850c9265 |
1710 | break; |
1711 | case OPLM_BYTE: |
5101a5f9 |
1712 | if (popr->name[1] == 'h') // XXX.. |
a2c1d768 |
1713 | snprintf(buf, buf_size, "%s(%s >> 8)", |
1714 | simplify_cast(cast, "(u8)"), opr_reg_p(po, popr)); |
5101a5f9 |
1715 | else |
a2c1d768 |
1716 | snprintf(buf, buf_size, "%s%s", |
1717 | simplify_cast(cast, "(u8)"), opr_reg_p(po, popr)); |
850c9265 |
1718 | break; |
91977a1c |
1719 | default: |
1720 | ferr(po, "invalid src lmod: %d\n", popr->lmod); |
1721 | } |
1722 | break; |
850c9265 |
1723 | |
91977a1c |
1724 | case OPT_REGMEM: |
1cd4a663 |
1725 | if (is_stack_access(po, popr)) { |
de50b98b |
1726 | stack_frame_access(po, popr, buf, buf_size, |
3ebea2cf |
1727 | popr->name, cast, 1, is_lea); |
91977a1c |
1728 | break; |
1729 | } |
850c9265 |
1730 | |
1731 | strcpy(expr, popr->name); |
1732 | if (strchr(expr, '[')) { |
1733 | // special case: '[' can only be left for label[reg] form |
1734 | ret = sscanf(expr, "%[^[][%[^]]]", tmp1, tmp2); |
1735 | if (ret != 2) |
1736 | ferr(po, "parse failure for '%s'\n", expr); |
a2c1d768 |
1737 | if (tmp1[0] == '(') { |
1738 | // (off_4FFF50+3)[eax] |
1739 | p = strchr(tmp1 + 1, ')'); |
1740 | if (p == NULL || p[1] != 0) |
1741 | ferr(po, "parse failure (2) for '%s'\n", expr); |
1742 | *p = 0; |
1743 | memmove(tmp1, tmp1 + 1, strlen(tmp1)); |
1744 | } |
33c35af6 |
1745 | snprintf(expr, sizeof(expr), "(u32)&%s + %s", tmp1, tmp2); |
850c9265 |
1746 | } |
1747 | |
1748 | // XXX: do we need more parsing? |
1749 | if (is_lea) { |
1750 | snprintf(buf, buf_size, "%s", expr); |
1751 | break; |
1752 | } |
1753 | |
a2c1d768 |
1754 | snprintf(buf, buf_size, "%s(%s)", |
1755 | simplify_cast(cast, lmod_cast_u_ptr(po, popr->lmod)), expr); |
91977a1c |
1756 | break; |
850c9265 |
1757 | |
91977a1c |
1758 | case OPT_LABEL: |
7aca4698 |
1759 | name = check_label_read_ref(po, popr->name); |
3ebea2cf |
1760 | if (cast[0] == 0 && popr->is_ptr) |
1761 | cast = "(u32)"; |
2b43685d |
1762 | |
850c9265 |
1763 | if (is_lea) |
7aca4698 |
1764 | snprintf(buf, buf_size, "(u32)&%s", name); |
2b43685d |
1765 | else if (popr->size_lt) |
1766 | snprintf(buf, buf_size, "%s%s%s%s", cast, |
1767 | lmod_cast_u_ptr(po, popr->lmod), |
7aca4698 |
1768 | popr->is_array ? "" : "&", name); |
850c9265 |
1769 | else |
7aca4698 |
1770 | snprintf(buf, buf_size, "%s%s%s", cast, name, |
7ba45c34 |
1771 | popr->is_array ? "[0]" : ""); |
850c9265 |
1772 | break; |
1773 | |
1774 | case OPT_OFFSET: |
7aca4698 |
1775 | name = check_label_read_ref(po, popr->name); |
3ebea2cf |
1776 | if (cast[0] == 0) |
1777 | cast = "(u32)"; |
850c9265 |
1778 | if (is_lea) |
1779 | ferr(po, "lea an offset?\n"); |
7aca4698 |
1780 | snprintf(buf, buf_size, "%s&%s", cast, name); |
91977a1c |
1781 | break; |
850c9265 |
1782 | |
91977a1c |
1783 | case OPT_CONST: |
850c9265 |
1784 | if (is_lea) |
1785 | ferr(po, "lea from const?\n"); |
1786 | |
a2c1d768 |
1787 | printf_number(tmp1, sizeof(tmp1), popr->val); |
ddaf8bd7 |
1788 | if (popr->val == 0 && strchr(cast, '*')) |
1789 | snprintf(buf, buf_size, "NULL"); |
1790 | else |
1791 | snprintf(buf, buf_size, "%s%s", |
1792 | simplify_cast_num(cast, popr->val), tmp1); |
91977a1c |
1793 | break; |
850c9265 |
1794 | |
91977a1c |
1795 | default: |
1796 | ferr(po, "invalid src type: %d\n", popr->type); |
1797 | } |
1798 | |
1799 | return buf; |
1800 | } |
c36e914d |
1801 | |
de50b98b |
1802 | // note: may set is_ptr (we find that out late for ebp frame..) |
91977a1c |
1803 | static char *out_dst_opr(char *buf, size_t buf_size, |
1804 | struct parsed_op *po, struct parsed_opr *popr) |
1805 | { |
1806 | switch (popr->type) { |
1807 | case OPT_REG: |
1808 | switch (popr->lmod) { |
90307a99 |
1809 | case OPLM_QWORD: |
1810 | snprintf(buf, buf_size, "%s.q", opr_reg_p(po, popr)); |
1811 | break; |
91977a1c |
1812 | case OPLM_DWORD: |
1813 | snprintf(buf, buf_size, "%s", opr_reg_p(po, popr)); |
1814 | break; |
850c9265 |
1815 | case OPLM_WORD: |
1816 | // ugh.. |
1817 | snprintf(buf, buf_size, "LOWORD(%s)", opr_reg_p(po, popr)); |
1818 | break; |
1819 | case OPLM_BYTE: |
1820 | // ugh.. |
5101a5f9 |
1821 | if (popr->name[1] == 'h') // XXX.. |
1822 | snprintf(buf, buf_size, "BYTE1(%s)", opr_reg_p(po, popr)); |
1823 | else |
1824 | snprintf(buf, buf_size, "LOBYTE(%s)", opr_reg_p(po, popr)); |
850c9265 |
1825 | break; |
91977a1c |
1826 | default: |
1827 | ferr(po, "invalid dst lmod: %d\n", popr->lmod); |
1828 | } |
1829 | break; |
850c9265 |
1830 | |
1831 | case OPT_REGMEM: |
1cd4a663 |
1832 | if (is_stack_access(po, popr)) { |
de50b98b |
1833 | stack_frame_access(po, popr, buf, buf_size, |
3ebea2cf |
1834 | popr->name, "", 0, 0); |
850c9265 |
1835 | break; |
1836 | } |
1837 | |
3ebea2cf |
1838 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
850c9265 |
1839 | |
bfa4a6ee |
1840 | case OPT_LABEL: |
2b43685d |
1841 | if (popr->size_mismatch) |
1842 | snprintf(buf, buf_size, "%s%s%s", |
1843 | lmod_cast_u_ptr(po, popr->lmod), |
1844 | popr->is_array ? "" : "&", popr->name); |
1845 | else |
1846 | snprintf(buf, buf_size, "%s%s", popr->name, |
1847 | popr->is_array ? "[0]" : ""); |
bfa4a6ee |
1848 | break; |
1849 | |
91977a1c |
1850 | default: |
1851 | ferr(po, "invalid dst type: %d\n", popr->type); |
1852 | } |
1853 | |
1854 | return buf; |
1855 | } |
c36e914d |
1856 | |
3ebea2cf |
1857 | static char *out_src_opr_u32(char *buf, size_t buf_size, |
1858 | struct parsed_op *po, struct parsed_opr *popr) |
1859 | { |
1860 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
1861 | } |
1862 | |
91977a1c |
1863 | static void out_test_for_cc(char *buf, size_t buf_size, |
940e8e66 |
1864 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv, |
69a3cdfc |
1865 | enum opr_lenmod lmod, const char *expr) |
91977a1c |
1866 | { |
69a3cdfc |
1867 | const char *cast, *scast; |
91977a1c |
1868 | |
69a3cdfc |
1869 | cast = lmod_cast_u(po, lmod); |
1870 | scast = lmod_cast_s(po, lmod); |
1871 | |
1872 | switch (pfo) { |
1873 | case PFO_Z: |
87bf6cec |
1874 | case PFO_BE: // CF=1||ZF=1; CF=0 |
850c9265 |
1875 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1876 | cast, expr, is_inv ? "!=" : "=="); |
91977a1c |
1877 | break; |
850c9265 |
1878 | |
5101a5f9 |
1879 | case PFO_S: |
1880 | case PFO_L: // SF!=OF; OF=0 |
1881 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1882 | scast, expr, is_inv ? ">=" : "<"); |
5101a5f9 |
1883 | break; |
1884 | |
87bf6cec |
1885 | case PFO_LE: // ZF=1||SF!=OF; OF=0 |
69a3cdfc |
1886 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1887 | scast, expr, is_inv ? ">" : "<="); |
850c9265 |
1888 | break; |
1889 | |
91977a1c |
1890 | default: |
69a3cdfc |
1891 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
91977a1c |
1892 | } |
1893 | } |
c36e914d |
1894 | |
850c9265 |
1895 | static void out_cmp_for_cc(char *buf, size_t buf_size, |
a2c1d768 |
1896 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv) |
850c9265 |
1897 | { |
a2c1d768 |
1898 | const char *cast, *scast, *cast_use; |
1899 | char buf1[256], buf2[256]; |
1900 | enum opr_lenmod lmod; |
1901 | |
90307a99 |
1902 | if (po->op != OP_DEC && po->operand[0].lmod != po->operand[1].lmod) |
a2c1d768 |
1903 | ferr(po, "%s: lmod mismatch: %d %d\n", __func__, |
1904 | po->operand[0].lmod, po->operand[1].lmod); |
1905 | lmod = po->operand[0].lmod; |
850c9265 |
1906 | |
69a3cdfc |
1907 | cast = lmod_cast_u(po, lmod); |
1908 | scast = lmod_cast_s(po, lmod); |
850c9265 |
1909 | |
a2c1d768 |
1910 | switch (pfo) { |
1911 | case PFO_C: |
1912 | case PFO_Z: |
1913 | case PFO_BE: // !a |
1914 | cast_use = cast; |
1915 | break; |
1916 | |
1917 | case PFO_S: |
1918 | case PFO_L: // !ge |
1919 | case PFO_LE: |
1920 | cast_use = scast; |
1921 | break; |
1922 | |
1923 | default: |
1924 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
1925 | } |
1926 | |
1927 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], cast_use, 0); |
90307a99 |
1928 | if (po->op == OP_DEC) |
1929 | snprintf(buf2, sizeof(buf2), "1"); |
1930 | else |
1931 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], cast_use, 0); |
a2c1d768 |
1932 | |
69a3cdfc |
1933 | switch (pfo) { |
5101a5f9 |
1934 | case PFO_C: |
1935 | // note: must be unsigned compare |
a2c1d768 |
1936 | snprintf(buf, buf_size, "(%s %s %s)", |
1937 | buf1, is_inv ? ">=" : "<", buf2); |
5101a5f9 |
1938 | break; |
1939 | |
69a3cdfc |
1940 | case PFO_Z: |
a2c1d768 |
1941 | snprintf(buf, buf_size, "(%s %s %s)", |
1942 | buf1, is_inv ? "!=" : "==", buf2); |
850c9265 |
1943 | break; |
1944 | |
5101a5f9 |
1945 | case PFO_BE: // !a |
850c9265 |
1946 | // note: must be unsigned compare |
a2c1d768 |
1947 | snprintf(buf, buf_size, "(%s %s %s)", |
1948 | buf1, is_inv ? ">" : "<=", buf2); |
1949 | |
1950 | // annoying case |
1951 | if (is_inv && lmod == OPLM_BYTE |
1952 | && po->operand[1].type == OPT_CONST |
1953 | && po->operand[1].val == 0xff) |
1954 | { |
1955 | snprintf(g_comment, sizeof(g_comment), "if %s", buf); |
1956 | snprintf(buf, buf_size, "(0)"); |
1957 | } |
5101a5f9 |
1958 | break; |
1959 | |
1960 | // note: must be signed compare |
1961 | case PFO_S: |
1962 | snprintf(buf, buf_size, "(%s(%s - %s) %s 0)", |
a2c1d768 |
1963 | scast, buf1, buf2, is_inv ? ">=" : "<"); |
850c9265 |
1964 | break; |
1965 | |
5101a5f9 |
1966 | case PFO_L: // !ge |
a2c1d768 |
1967 | snprintf(buf, buf_size, "(%s %s %s)", |
1968 | buf1, is_inv ? ">=" : "<", buf2); |
850c9265 |
1969 | break; |
1970 | |
90307a99 |
1971 | case PFO_LE: // !g |
a2c1d768 |
1972 | snprintf(buf, buf_size, "(%s %s %s)", |
1973 | buf1, is_inv ? ">" : "<=", buf2); |
5101a5f9 |
1974 | break; |
1975 | |
850c9265 |
1976 | default: |
a2c1d768 |
1977 | break; |
850c9265 |
1978 | } |
1979 | } |
1980 | |
69a3cdfc |
1981 | static void out_cmp_test(char *buf, size_t buf_size, |
940e8e66 |
1982 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv) |
69a3cdfc |
1983 | { |
1984 | char buf1[256], buf2[256], buf3[256]; |
1985 | |
1986 | if (po->op == OP_TEST) { |
1987 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
3ebea2cf |
1988 | out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[0]); |
69a3cdfc |
1989 | } |
1990 | else { |
3ebea2cf |
1991 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
1992 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
69a3cdfc |
1993 | snprintf(buf3, sizeof(buf3), "(%s & %s)", buf1, buf2); |
1994 | } |
940e8e66 |
1995 | out_test_for_cc(buf, buf_size, po, pfo, is_inv, |
69a3cdfc |
1996 | po->operand[0].lmod, buf3); |
1997 | } |
1998 | else if (po->op == OP_CMP) { |
a2c1d768 |
1999 | out_cmp_for_cc(buf, buf_size, po, pfo, is_inv); |
69a3cdfc |
2000 | } |
2001 | else |
2002 | ferr(po, "%s: unhandled op: %d\n", __func__, po->op); |
2003 | } |
2004 | |
850c9265 |
2005 | static void propagate_lmod(struct parsed_op *po, struct parsed_opr *popr1, |
91977a1c |
2006 | struct parsed_opr *popr2) |
2007 | { |
2008 | if (popr1->lmod == OPLM_UNSPEC && popr2->lmod == OPLM_UNSPEC) |
2009 | ferr(po, "missing lmod for both operands\n"); |
2010 | |
2011 | if (popr1->lmod == OPLM_UNSPEC) |
2012 | popr1->lmod = popr2->lmod; |
2013 | else if (popr2->lmod == OPLM_UNSPEC) |
2014 | popr2->lmod = popr1->lmod; |
a3684be1 |
2015 | else if (popr1->lmod != popr2->lmod) { |
2016 | if (popr1->type_from_var) { |
2017 | popr1->size_mismatch = 1; |
2018 | if (popr1->lmod < popr2->lmod) |
2019 | popr1->size_lt = 1; |
2020 | popr1->lmod = popr2->lmod; |
2021 | } |
2022 | else if (popr2->type_from_var) { |
2023 | popr2->size_mismatch = 1; |
2024 | if (popr2->lmod < popr1->lmod) |
2025 | popr2->size_lt = 1; |
2026 | popr2->lmod = popr1->lmod; |
2027 | } |
2028 | else |
2029 | ferr(po, "conflicting lmods: %d vs %d\n", |
2030 | popr1->lmod, popr2->lmod); |
2031 | } |
91977a1c |
2032 | } |
c36e914d |
2033 | |
850c9265 |
2034 | static const char *op_to_c(struct parsed_op *po) |
2035 | { |
2036 | switch (po->op) |
2037 | { |
2038 | case OP_ADD: |
5101a5f9 |
2039 | case OP_ADC: |
850c9265 |
2040 | return "+"; |
2041 | case OP_SUB: |
5101a5f9 |
2042 | case OP_SBB: |
850c9265 |
2043 | return "-"; |
2044 | case OP_AND: |
2045 | return "&"; |
2046 | case OP_OR: |
2047 | return "|"; |
2048 | case OP_XOR: |
2049 | return "^"; |
2050 | case OP_SHL: |
2051 | return "<<"; |
2052 | case OP_SHR: |
2053 | return ">>"; |
2054 | case OP_MUL: |
2055 | case OP_IMUL: |
2056 | return "*"; |
2057 | default: |
2058 | ferr(po, "op_to_c was supplied with %d\n", po->op); |
2059 | } |
2060 | } |
2061 | |
7ae48d73 |
2062 | static void op_set_clear_flag(struct parsed_op *po, |
2063 | enum op_flags flag_set, enum op_flags flag_clear) |
d4e3b5db |
2064 | { |
7ae48d73 |
2065 | po->flags |= flag_set; |
2066 | po->flags &= ~flag_clear; |
d4e3b5db |
2067 | } |
2068 | |
de50b98b |
2069 | // last op in stream - unconditional branch or ret |
2070 | #define LAST_OP(_i) ((ops[_i].flags & OPF_TAIL) \ |
092f64e1 |
2071 | || ((ops[_i].flags & (OPF_JMP|OPF_CJMP|OPF_RMD)) == OPF_JMP \ |
037f4971 |
2072 | && ops[_i].op != OP_CALL)) |
de50b98b |
2073 | |
87bf6cec |
2074 | static int scan_for_pop(int i, int opcnt, const char *reg, |
d4e3b5db |
2075 | int magic, int depth, int *maxdepth, int do_flags) |
850c9265 |
2076 | { |
89ff3147 |
2077 | const struct parsed_proto *pp; |
87bf6cec |
2078 | struct parsed_op *po; |
2079 | int ret = 0; |
4c45fa73 |
2080 | int j; |
87bf6cec |
2081 | |
850c9265 |
2082 | for (; i < opcnt; i++) { |
87bf6cec |
2083 | po = &ops[i]; |
2084 | if (po->cc_scratch == magic) |
2085 | break; // already checked |
2086 | po->cc_scratch = magic; |
2087 | |
89ff3147 |
2088 | if (po->flags & OPF_TAIL) { |
2089 | if (po->op == OP_CALL) { |
2090 | pp = proto_parse(g_fhdr, po->operand[0].name, 0); |
2091 | if (pp != NULL && pp->is_noreturn) |
2092 | // no stack cleanup for noreturn |
2093 | return ret; |
2094 | } |
87bf6cec |
2095 | return -1; // deadend |
89ff3147 |
2096 | } |
87bf6cec |
2097 | |
1bafb621 |
2098 | if ((po->flags & OPF_RMD) |
5f70a34f |
2099 | || (po->op == OP_PUSH && po->p_argnum != 0)) // arg push |
850c9265 |
2100 | continue; |
2101 | |
87bf6cec |
2102 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
4c45fa73 |
2103 | if (po->btj != NULL) { |
2104 | // jumptable |
da87ae38 |
2105 | for (j = 0; j < po->btj->count; j++) { |
4c45fa73 |
2106 | ret |= scan_for_pop(po->btj->d[j].bt_i, opcnt, reg, magic, |
2107 | depth, maxdepth, do_flags); |
2108 | if (ret < 0) |
2109 | return ret; // dead end |
2110 | } |
da87ae38 |
2111 | return ret; |
4c45fa73 |
2112 | } |
2113 | |
87bf6cec |
2114 | if (po->bt_i < 0) { |
2115 | ferr(po, "dead branch\n"); |
2116 | return -1; |
2117 | } |
850c9265 |
2118 | |
5c024ef7 |
2119 | if (po->flags & OPF_CJMP) { |
d4e3b5db |
2120 | ret |= scan_for_pop(po->bt_i, opcnt, reg, magic, |
2121 | depth, maxdepth, do_flags); |
87bf6cec |
2122 | if (ret < 0) |
2123 | return ret; // dead end |
2124 | } |
2125 | else { |
2126 | i = po->bt_i - 1; |
2127 | } |
2128 | continue; |
2129 | } |
2130 | |
d4e3b5db |
2131 | if ((po->op == OP_POP || po->op == OP_PUSH) |
2132 | && po->operand[0].type == OPT_REG |
87bf6cec |
2133 | && IS(po->operand[0].name, reg)) |
2134 | { |
da87ae38 |
2135 | if (po->op == OP_PUSH && !(po->flags & OPF_FARG)) { |
d4e3b5db |
2136 | depth++; |
2137 | if (depth > *maxdepth) |
2138 | *maxdepth = depth; |
2139 | if (do_flags) |
7ae48d73 |
2140 | op_set_clear_flag(po, OPF_RSAVE, OPF_RMD); |
d4e3b5db |
2141 | } |
da87ae38 |
2142 | else if (po->op == OP_POP) { |
2143 | if (depth == 0) { |
2144 | if (do_flags) |
2145 | op_set_clear_flag(po, OPF_RMD, OPF_RSAVE); |
2146 | return 1; |
2147 | } |
2148 | else { |
2149 | depth--; |
2150 | if (depth < 0) // should not happen |
2151 | ferr(po, "fail with depth\n"); |
2152 | if (do_flags) |
2153 | op_set_clear_flag(po, OPF_RSAVE, OPF_RMD); |
2154 | } |
d4e3b5db |
2155 | } |
87bf6cec |
2156 | } |
850c9265 |
2157 | } |
2158 | |
87bf6cec |
2159 | return ret; |
850c9265 |
2160 | } |
2161 | |
69a3cdfc |
2162 | // scan for pop starting from 'ret' op (all paths) |
d4e3b5db |
2163 | static int scan_for_pop_ret(int i, int opcnt, const char *reg, |
2164 | int flag_set) |
850c9265 |
2165 | { |
2166 | int found = 0; |
2167 | int j; |
2168 | |
2169 | for (; i < opcnt; i++) { |
87bf6cec |
2170 | if (!(ops[i].flags & OPF_TAIL)) |
850c9265 |
2171 | continue; |
2172 | |
2173 | for (j = i - 1; j >= 0; j--) { |
69a3cdfc |
2174 | if (ops[j].flags & OPF_RMD) |
2175 | continue; |
2176 | if (ops[j].flags & OPF_JMP) |
850c9265 |
2177 | return -1; |
2178 | |
2179 | if (ops[j].op == OP_POP && ops[j].operand[0].type == OPT_REG |
2180 | && IS(ops[j].operand[0].name, reg)) |
2181 | { |
2182 | found = 1; |
d4e3b5db |
2183 | ops[j].flags |= flag_set; |
850c9265 |
2184 | break; |
2185 | } |
2186 | |
2187 | if (g_labels[j][0] != 0) |
2188 | return -1; |
2189 | } |
2190 | } |
2191 | |
2192 | return found ? 0 : -1; |
2193 | } |
2194 | |
591721d7 |
2195 | static void scan_propagate_df(int i, int opcnt) |
2196 | { |
2197 | struct parsed_op *po = &ops[i]; |
2198 | int j; |
2199 | |
2200 | for (; i < opcnt; i++) { |
2201 | po = &ops[i]; |
2202 | if (po->flags & OPF_DF) |
2203 | return; // already resolved |
2204 | po->flags |= OPF_DF; |
2205 | |
2206 | if (po->op == OP_CALL) |
2207 | ferr(po, "call with DF set?\n"); |
2208 | |
2209 | if (po->flags & OPF_JMP) { |
2210 | if (po->btj != NULL) { |
2211 | // jumptable |
2212 | for (j = 0; j < po->btj->count; j++) |
2213 | scan_propagate_df(po->btj->d[j].bt_i, opcnt); |
2214 | return; |
2215 | } |
2216 | |
2217 | if (po->bt_i < 0) { |
2218 | ferr(po, "dead branch\n"); |
2219 | return; |
2220 | } |
2221 | |
5c024ef7 |
2222 | if (po->flags & OPF_CJMP) |
591721d7 |
2223 | scan_propagate_df(po->bt_i, opcnt); |
2224 | else |
2225 | i = po->bt_i - 1; |
2226 | continue; |
2227 | } |
2228 | |
2229 | if (po->flags & OPF_TAIL) |
2230 | break; |
2231 | |
2232 | if (po->op == OP_CLD) { |
2233 | po->flags |= OPF_RMD; |
2234 | return; |
2235 | } |
2236 | } |
2237 | |
2238 | ferr(po, "missing DF clear?\n"); |
2239 | } |
2240 | |
1cd4a663 |
2241 | // is operand 'opr' modified by parsed_op 'po'? |
5101a5f9 |
2242 | static int is_opr_modified(const struct parsed_opr *opr, |
69a3cdfc |
2243 | const struct parsed_op *po) |
2244 | { |
89ff3147 |
2245 | int mask; |
2246 | |
69a3cdfc |
2247 | if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA)) |
2248 | return 0; |
2249 | |
89ff3147 |
2250 | if (opr->type == OPT_REG) { |
2251 | if (po->op == OP_CALL) { |
2252 | mask = (1 << xAX) | (1 << xCX) | (1 << xDX); |
2253 | if ((1 << opr->reg) & mask) |
2254 | return 1; |
2255 | else |
2256 | return 0; |
2257 | } |
2258 | |
2259 | if (po->operand[0].type == OPT_REG) { |
2260 | if (po->regmask_dst & (1 << opr->reg)) |
2261 | return 1; |
2262 | else |
2263 | return 0; |
2264 | } |
69a3cdfc |
2265 | } |
2266 | |
2267 | return IS(po->operand[0].name, opr->name); |
2268 | } |
2269 | |
5101a5f9 |
2270 | // is any operand of parsed_op 'po_test' modified by parsed_op 'po'? |
2271 | static int is_any_opr_modified(const struct parsed_op *po_test, |
89ff3147 |
2272 | const struct parsed_op *po, int c_mode) |
5101a5f9 |
2273 | { |
89ff3147 |
2274 | int mask; |
5101a5f9 |
2275 | int i; |
2276 | |
2277 | if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA)) |
2278 | return 0; |
2279 | |
de50b98b |
2280 | if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST) |
2281 | return 0; |
2282 | |
2283 | if ((po_test->regmask_src | po_test->regmask_dst) & po->regmask_dst) |
2284 | return 1; |
2285 | |
2286 | // in reality, it can wreck any register, but in decompiled C |
2b43685d |
2287 | // version it can only overwrite eax or edx:eax |
89ff3147 |
2288 | mask = (1 << xAX) | (1 << xDX); |
2289 | if (!c_mode) |
2290 | mask |= 1 << xCX; |
2291 | |
de50b98b |
2292 | if (po->op == OP_CALL |
89ff3147 |
2293 | && ((po_test->regmask_src | po_test->regmask_dst) & mask)) |
5101a5f9 |
2294 | return 1; |
2295 | |
2296 | for (i = 0; i < po_test->operand_cnt; i++) |
2297 | if (IS(po_test->operand[i].name, po->operand[0].name)) |
2298 | return 1; |
2299 | |
2300 | return 0; |
2301 | } |
2302 | |
940e8e66 |
2303 | // scan for any po_test operand modification in range given |
89ff3147 |
2304 | static int scan_for_mod(struct parsed_op *po_test, int i, int opcnt, |
2305 | int c_mode) |
69a3cdfc |
2306 | { |
2b43685d |
2307 | if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST) |
2308 | return -1; |
2309 | |
69a3cdfc |
2310 | for (; i < opcnt; i++) { |
89ff3147 |
2311 | if (is_any_opr_modified(po_test, &ops[i], c_mode)) |
69a3cdfc |
2312 | return i; |
2313 | } |
2314 | |
2315 | return -1; |
2316 | } |
2317 | |
940e8e66 |
2318 | // scan for po_test operand[0] modification in range given |
2319 | static int scan_for_mod_opr0(struct parsed_op *po_test, |
2320 | int i, int opcnt) |
2321 | { |
2322 | for (; i < opcnt; i++) { |
2323 | if (is_opr_modified(&po_test->operand[0], &ops[i])) |
2324 | return i; |
2325 | } |
2326 | |
2327 | return -1; |
2328 | } |
2329 | |
04f8a628 |
2330 | static int scan_for_flag_set(int i, int magic, int *branched, |
2331 | int *setters, int *setter_cnt) |
69a3cdfc |
2332 | { |
04f8a628 |
2333 | struct label_ref *lr; |
2b43685d |
2334 | int ret; |
de50b98b |
2335 | |
2336 | while (i >= 0) { |
04f8a628 |
2337 | if (ops[i].cc_scratch == magic) { |
2338 | ferr(&ops[i], "%s looped\n", __func__); |
2339 | return -1; |
2340 | } |
2341 | ops[i].cc_scratch = magic; |
2342 | |
de50b98b |
2343 | if (g_labels[i][0] != 0) { |
2b43685d |
2344 | *branched = 1; |
04f8a628 |
2345 | |
2346 | lr = &g_label_refs[i]; |
2347 | for (; lr->next; lr = lr->next) { |
2348 | ret = scan_for_flag_set(lr->i, magic, |
2349 | branched, setters, setter_cnt); |
2350 | if (ret < 0) |
2351 | return ret; |
2352 | } |
2353 | |
de50b98b |
2354 | if (i > 0 && LAST_OP(i - 1)) { |
94d447fb |
2355 | i = lr->i; |
de50b98b |
2356 | continue; |
2357 | } |
04f8a628 |
2358 | ret = scan_for_flag_set(lr->i, magic, |
2359 | branched, setters, setter_cnt); |
2b43685d |
2360 | if (ret < 0) |
2361 | return ret; |
de50b98b |
2362 | } |
2363 | i--; |
2364 | |
2b43685d |
2365 | if (ops[i].flags & OPF_FLAGS) { |
2366 | setters[*setter_cnt] = i; |
2367 | (*setter_cnt)++; |
2368 | return 0; |
2369 | } |
69a3cdfc |
2370 | |
5c024ef7 |
2371 | if ((ops[i].flags & (OPF_JMP|OPF_CJMP)) == OPF_JMP) |
69a3cdfc |
2372 | return -1; |
69a3cdfc |
2373 | } |
2374 | |
2375 | return -1; |
2376 | } |
2377 | |
5101a5f9 |
2378 | // scan back for cdq, if anything modifies edx, fail |
2379 | static int scan_for_cdq_edx(int i) |
2380 | { |
cdfaeed7 |
2381 | while (i >= 0) { |
2382 | if (g_labels[i][0] != 0) { |
2383 | if (g_label_refs[i].next != NULL) |
2384 | return -1; |
2385 | if (i > 0 && LAST_OP(i - 1)) { |
2386 | i = g_label_refs[i].i; |
2387 | continue; |
2388 | } |
2389 | return -1; |
2390 | } |
2391 | i--; |
2392 | |
5101a5f9 |
2393 | if (ops[i].op == OP_CDQ) |
2394 | return i; |
2395 | |
2396 | if (ops[i].regmask_dst & (1 << xDX)) |
2397 | return -1; |
5101a5f9 |
2398 | } |
2399 | |
2400 | return -1; |
2401 | } |
2402 | |
64c59faf |
2403 | static int scan_for_reg_clear(int i, int reg) |
2404 | { |
cdfaeed7 |
2405 | while (i >= 0) { |
2406 | if (g_labels[i][0] != 0) { |
2407 | if (g_label_refs[i].next != NULL) |
2408 | return -1; |
2409 | if (i > 0 && LAST_OP(i - 1)) { |
2410 | i = g_label_refs[i].i; |
2411 | continue; |
2412 | } |
2413 | return -1; |
2414 | } |
2415 | i--; |
2416 | |
64c59faf |
2417 | if (ops[i].op == OP_XOR |
2418 | && ops[i].operand[0].lmod == OPLM_DWORD |
2419 | && ops[i].operand[0].reg == ops[i].operand[1].reg |
2420 | && ops[i].operand[0].reg == reg) |
2421 | return i; |
2422 | |
2423 | if (ops[i].regmask_dst & (1 << reg)) |
2424 | return -1; |
64c59faf |
2425 | } |
2426 | |
2427 | return -1; |
2428 | } |
2429 | |
1bafb621 |
2430 | // scan for positive, constant esp adjust |
4741fdfe |
2431 | static int scan_for_esp_adjust(int i, int opcnt, int *adj, |
2432 | int *multipath) |
1bafb621 |
2433 | { |
7ba45c34 |
2434 | struct parsed_op *po; |
46411e6c |
2435 | int first_pop = -1; |
4741fdfe |
2436 | |
2437 | *adj = *multipath = 0; |
7ba45c34 |
2438 | |
1bafb621 |
2439 | for (; i < opcnt; i++) { |
7ba45c34 |
2440 | po = &ops[i]; |
2441 | |
a2c1d768 |
2442 | if (g_labels[i][0] != 0) |
4741fdfe |
2443 | *multipath = 1; |
a2c1d768 |
2444 | |
7ba45c34 |
2445 | if (po->op == OP_ADD && po->operand[0].reg == xSP) { |
2446 | if (po->operand[1].type != OPT_CONST) |
1bafb621 |
2447 | ferr(&ops[i], "non-const esp adjust?\n"); |
7ba45c34 |
2448 | *adj += po->operand[1].val; |
1bafb621 |
2449 | if (*adj & 3) |
2450 | ferr(&ops[i], "unaligned esp adjust: %x\n", *adj); |
2451 | return i; |
2452 | } |
108e9fe3 |
2453 | else if (po->op == OP_PUSH && !(po->flags & OPF_RMD)) { |
5c024ef7 |
2454 | //if (first_pop == -1) |
2455 | // first_pop = -2; // none |
7ba45c34 |
2456 | *adj -= lmod_bytes(po, po->operand[0].lmod); |
46411e6c |
2457 | } |
5c024ef7 |
2458 | else if (po->op == OP_POP && !(po->flags & OPF_RMD)) { |
108e9fe3 |
2459 | // seems like msvc only uses 'pop ecx' for stack realignment.. |
2460 | if (po->operand[0].type != OPT_REG || po->operand[0].reg != xCX) |
2461 | break; |
5c024ef7 |
2462 | if (first_pop == -1 && *adj >= 0) |
46411e6c |
2463 | first_pop = i; |
7ba45c34 |
2464 | *adj += lmod_bytes(po, po->operand[0].lmod); |
46411e6c |
2465 | } |
e56ab892 |
2466 | else if (po->flags & (OPF_JMP|OPF_TAIL)) { |
4741fdfe |
2467 | if (po->op == OP_JMP && po->btj == NULL) { |
2468 | i = po->bt_i - 1; |
2469 | continue; |
2470 | } |
e56ab892 |
2471 | if (po->op != OP_CALL) |
a2c1d768 |
2472 | break; |
e56ab892 |
2473 | if (po->operand[0].type != OPT_LABEL) |
a2c1d768 |
2474 | break; |
092f64e1 |
2475 | if (po->pp != NULL && po->pp->is_stdcall) |
89ff3147 |
2476 | break; |
e56ab892 |
2477 | } |
a2c1d768 |
2478 | } |
7ba45c34 |
2479 | |
108e9fe3 |
2480 | if (first_pop >= 0) { |
a2c1d768 |
2481 | // probably 'pop ecx' was used.. |
46411e6c |
2482 | return first_pop; |
1bafb621 |
2483 | } |
2484 | |
2485 | return -1; |
2486 | } |
2487 | |
a3684be1 |
2488 | static void scan_fwd_set_flags(int i, int opcnt, int magic, int flags) |
2489 | { |
2490 | struct parsed_op *po; |
2491 | int j; |
2492 | |
2493 | if (i < 0) |
2494 | ferr(ops, "%s: followed bad branch?\n", __func__); |
2495 | |
2496 | for (; i < opcnt; i++) { |
2497 | po = &ops[i]; |
2498 | if (po->cc_scratch == magic) |
2499 | return; |
2500 | po->cc_scratch = magic; |
2501 | po->flags |= flags; |
2502 | |
2503 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
2504 | if (po->btj != NULL) { |
2505 | // jumptable |
2506 | for (j = 0; j < po->btj->count; j++) |
2507 | scan_fwd_set_flags(po->btj->d[j].bt_i, opcnt, magic, flags); |
2508 | return; |
2509 | } |
2510 | |
2511 | scan_fwd_set_flags(po->bt_i, opcnt, magic, flags); |
5c024ef7 |
2512 | if (!(po->flags & OPF_CJMP)) |
a3684be1 |
2513 | return; |
2514 | } |
2515 | if (po->flags & OPF_TAIL) |
2516 | return; |
2517 | } |
2518 | } |
2519 | |
1cd4a663 |
2520 | static const struct parsed_proto *try_recover_pp( |
da87ae38 |
2521 | struct parsed_op *po, const struct parsed_opr *opr, int *search_instead) |
1cd4a663 |
2522 | { |
2523 | const struct parsed_proto *pp = NULL; |
89ff3147 |
2524 | char buf[256]; |
2525 | char *p; |
1cd4a663 |
2526 | |
2527 | // maybe an arg of g_func? |
2528 | if (opr->type == OPT_REGMEM && is_stack_access(po, opr)) |
2529 | { |
2530 | char ofs_reg[16] = { 0, }; |
2531 | int arg, arg_s, arg_i; |
2532 | int stack_ra = 0; |
2533 | int offset = 0; |
2534 | |
2535 | parse_stack_access(po, opr->name, ofs_reg, |
037f4971 |
2536 | &offset, &stack_ra, NULL, 0); |
1cd4a663 |
2537 | if (ofs_reg[0] != 0) |
2538 | ferr(po, "offset reg on arg access?\n"); |
da87ae38 |
2539 | if (offset <= stack_ra) { |
2540 | // search who set the stack var instead |
2541 | if (search_instead != NULL) |
2542 | *search_instead = 1; |
2543 | return NULL; |
2544 | } |
1cd4a663 |
2545 | |
2546 | arg_i = (offset - stack_ra - 4) / 4; |
2547 | for (arg = arg_s = 0; arg < g_func_pp->argc; arg++) { |
2548 | if (g_func_pp->arg[arg].reg != NULL) |
2549 | continue; |
2550 | if (arg_s == arg_i) |
2551 | break; |
2552 | arg_s++; |
2553 | } |
2554 | if (arg == g_func_pp->argc) |
2555 | ferr(po, "stack arg %d not in prototype?\n", arg_i); |
2556 | |
2557 | pp = g_func_pp->arg[arg].fptr; |
2558 | if (pp == NULL) |
46411e6c |
2559 | ferr(po, "icall sa: arg%d is not a fptr?\n", arg + 1); |
89ff3147 |
2560 | check_func_pp(po, pp, "icall arg"); |
2561 | } |
2562 | else if (opr->type == OPT_REGMEM && strchr(opr->name + 1, '[')) { |
2563 | // label[index] |
2564 | p = strchr(opr->name + 1, '['); |
2565 | memcpy(buf, opr->name, p - opr->name); |
2566 | buf[p - opr->name] = 0; |
2567 | pp = proto_parse(g_fhdr, buf, 0); |
1cd4a663 |
2568 | } |
2569 | else if (opr->type == OPT_OFFSET || opr->type == OPT_LABEL) { |
36595fd2 |
2570 | pp = proto_parse(g_fhdr, opr->name, 0); |
1cd4a663 |
2571 | if (pp == NULL) |
2572 | ferr(po, "proto_parse failed for icall from '%s'\n", opr->name); |
89ff3147 |
2573 | check_func_pp(po, pp, "reg-fptr ref"); |
1cd4a663 |
2574 | } |
2575 | |
2576 | return pp; |
2577 | } |
2578 | |
da87ae38 |
2579 | static void scan_for_call_type(int i, const struct parsed_opr *opr, |
89ff3147 |
2580 | int magic, const struct parsed_proto **pp_found, int *multi) |
1cd4a663 |
2581 | { |
2582 | const struct parsed_proto *pp = NULL; |
2583 | struct parsed_op *po; |
2584 | struct label_ref *lr; |
2585 | |
037f4971 |
2586 | ops[i].cc_scratch = magic; |
1cd4a663 |
2587 | |
037f4971 |
2588 | while (1) { |
1cd4a663 |
2589 | if (g_labels[i][0] != 0) { |
2590 | lr = &g_label_refs[i]; |
2591 | for (; lr != NULL; lr = lr->next) |
89ff3147 |
2592 | scan_for_call_type(lr->i, opr, magic, pp_found, multi); |
46411e6c |
2593 | if (i > 0 && LAST_OP(i - 1)) |
2594 | return; |
1cd4a663 |
2595 | } |
037f4971 |
2596 | |
1cd4a663 |
2597 | i--; |
037f4971 |
2598 | if (i < 0) |
2599 | break; |
2600 | |
2601 | if (ops[i].cc_scratch == magic) |
2602 | return; |
2603 | ops[i].cc_scratch = magic; |
1cd4a663 |
2604 | |
2605 | if (!(ops[i].flags & OPF_DATA)) |
2606 | continue; |
2607 | if (!is_opr_modified(opr, &ops[i])) |
2608 | continue; |
2609 | if (ops[i].op != OP_MOV && ops[i].op != OP_LEA) { |
2610 | // most probably trashed by some processing |
2611 | *pp_found = NULL; |
2612 | return; |
2613 | } |
2614 | |
2615 | opr = &ops[i].operand[1]; |
2616 | if (opr->type != OPT_REG) |
2617 | break; |
2618 | } |
2619 | |
2620 | po = (i >= 0) ? &ops[i] : ops; |
2621 | |
2622 | if (i < 0) { |
2623 | // reached the top - can only be an arg-reg |
2624 | if (opr->type != OPT_REG) |
2625 | return; |
2626 | |
2627 | for (i = 0; i < g_func_pp->argc; i++) { |
2628 | if (g_func_pp->arg[i].reg == NULL) |
2629 | continue; |
2630 | if (IS(opr->name, g_func_pp->arg[i].reg)) |
2631 | break; |
2632 | } |
2633 | if (i == g_func_pp->argc) |
2634 | return; |
2635 | pp = g_func_pp->arg[i].fptr; |
2636 | if (pp == NULL) |
46411e6c |
2637 | ferr(po, "icall: arg%d (%s) is not a fptr?\n", |
2638 | i + 1, g_func_pp->arg[i].reg); |
89ff3147 |
2639 | check_func_pp(po, pp, "icall reg-arg"); |
1cd4a663 |
2640 | } |
2641 | else |
da87ae38 |
2642 | pp = try_recover_pp(po, opr, NULL); |
1cd4a663 |
2643 | |
89ff3147 |
2644 | if (*pp_found != NULL && pp != NULL && *pp_found != pp) { |
1cd4a663 |
2645 | if (!IS((*pp_found)->ret_type.name, pp->ret_type.name) |
2646 | || (*pp_found)->is_stdcall != pp->is_stdcall |
89ff3147 |
2647 | || (*pp_found)->is_fptr != pp->is_fptr |
1cd4a663 |
2648 | || (*pp_found)->argc != pp->argc |
2649 | || (*pp_found)->argc_reg != pp->argc_reg |
2650 | || (*pp_found)->argc_stack != pp->argc_stack) |
2651 | { |
2652 | ferr(po, "icall: parsed_proto mismatch\n"); |
2653 | } |
89ff3147 |
2654 | *multi = 1; |
1cd4a663 |
2655 | } |
2656 | if (pp != NULL) |
2657 | *pp_found = pp; |
2658 | } |
2659 | |
89ff3147 |
2660 | static const struct parsed_proto *resolve_icall(int i, int opcnt, |
2661 | int *multi_src) |
1cd4a663 |
2662 | { |
2663 | const struct parsed_proto *pp = NULL; |
da87ae38 |
2664 | int search_advice = 0; |
1cd4a663 |
2665 | |
89ff3147 |
2666 | *multi_src = 0; |
2667 | |
1cd4a663 |
2668 | switch (ops[i].operand[0].type) { |
2669 | case OPT_REGMEM: |
2670 | case OPT_LABEL: |
2671 | case OPT_OFFSET: |
da87ae38 |
2672 | pp = try_recover_pp(&ops[i], &ops[i].operand[0], &search_advice); |
2673 | if (!search_advice) |
2674 | break; |
2675 | // fallthrough |
1cd4a663 |
2676 | default: |
89ff3147 |
2677 | scan_for_call_type(i, &ops[i].operand[0], i + opcnt * 9, &pp, |
2678 | multi_src); |
1cd4a663 |
2679 | break; |
2680 | } |
2681 | |
2682 | return pp; |
2683 | } |
2684 | |
23fd0b11 |
2685 | // find an instruction that changed opr before i op |
2686 | // *op_i must be set to -1 |
2687 | static int resolve_origin(int i, const struct parsed_opr *opr, |
2688 | int magic, int *op_i) |
1f84f6b3 |
2689 | { |
2690 | struct label_ref *lr; |
2691 | int ret = 0; |
2692 | |
2693 | ops[i].cc_scratch = magic; |
2694 | |
2695 | while (1) { |
2696 | if (g_labels[i][0] != 0) { |
2697 | lr = &g_label_refs[i]; |
2698 | for (; lr != NULL; lr = lr->next) |
23fd0b11 |
2699 | ret |= resolve_origin(lr->i, opr, magic, op_i); |
1f84f6b3 |
2700 | if (i > 0 && LAST_OP(i - 1)) |
2701 | return ret; |
2702 | } |
2703 | |
2704 | i--; |
2705 | if (i < 0) |
2706 | return -1; |
2707 | |
2708 | if (ops[i].cc_scratch == magic) |
2709 | return 0; |
2710 | ops[i].cc_scratch = magic; |
2711 | |
2712 | if (!(ops[i].flags & OPF_DATA)) |
2713 | continue; |
2714 | if (!is_opr_modified(opr, &ops[i])) |
2715 | continue; |
23fd0b11 |
2716 | |
2717 | if (*op_i >= 0) { |
2718 | if (*op_i == i) |
2719 | return 1; |
2720 | // XXX: could check if the other op does the same |
2721 | return -1; |
2722 | } |
2723 | |
2724 | *op_i = i; |
2725 | return 1; |
2726 | } |
2727 | } |
2728 | |
2729 | static int try_resolve_const(int i, const struct parsed_opr *opr, |
2730 | int magic, unsigned int *val) |
2731 | { |
2732 | int s_i = -1; |
2733 | int ret = 0; |
2734 | |
2735 | ret = resolve_origin(i, opr, magic, &s_i); |
2736 | if (ret == 1) { |
2737 | i = s_i; |
1f84f6b3 |
2738 | if (ops[i].op != OP_MOV && ops[i].operand[1].type != OPT_CONST) |
2739 | return -1; |
2740 | |
2741 | *val = ops[i].operand[1].val; |
2742 | return 1; |
2743 | } |
23fd0b11 |
2744 | |
2745 | return -1; |
1f84f6b3 |
2746 | } |
2747 | |
89ff3147 |
2748 | static int collect_call_args_r(struct parsed_op *po, int i, |
75ad0378 |
2749 | struct parsed_proto *pp, int *regmask, int *save_arg_vars, int arg, |
a3684be1 |
2750 | int magic, int need_op_saving, int may_reuse) |
e56ab892 |
2751 | { |
2752 | struct parsed_proto *pp_tmp; |
2753 | struct label_ref *lr; |
2b43685d |
2754 | int need_to_save_current; |
23fd0b11 |
2755 | int save_args; |
e56ab892 |
2756 | int ret = 0; |
5f70a34f |
2757 | int reg; |
23fd0b11 |
2758 | char buf[32]; |
2759 | int j, k; |
e56ab892 |
2760 | |
a3684be1 |
2761 | if (i < 0) { |
a2c1d768 |
2762 | ferr(po, "dead label encountered\n"); |
a3684be1 |
2763 | return -1; |
2764 | } |
e56ab892 |
2765 | |
de50b98b |
2766 | for (; arg < pp->argc; arg++) |
e56ab892 |
2767 | if (pp->arg[arg].reg == NULL) |
2768 | break; |
a3684be1 |
2769 | magic = (magic & 0xffffff) | (arg << 24); |
e56ab892 |
2770 | |
89ff3147 |
2771 | for (j = i; j >= 0 && (arg < pp->argc || pp->is_unresolved); ) |
e56ab892 |
2772 | { |
a3684be1 |
2773 | if (((ops[j].cc_scratch ^ magic) & 0xffffff) == 0) { |
2774 | if (ops[j].cc_scratch != magic) { |
2775 | ferr(&ops[j], "arg collect hit same path with diff args for %s\n", |
2776 | pp->name); |
2777 | return -1; |
2778 | } |
2779 | // ok: have already been here |
2780 | return 0; |
2781 | } |
2782 | ops[j].cc_scratch = magic; |
2783 | |
a2c1d768 |
2784 | if (g_labels[j][0] != 0 && g_label_refs[j].i != -1) { |
e56ab892 |
2785 | lr = &g_label_refs[j]; |
2786 | if (lr->next != NULL) |
2787 | need_op_saving = 1; |
a652aa9f |
2788 | for (; lr->next; lr = lr->next) { |
5c024ef7 |
2789 | if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP) |
a652aa9f |
2790 | may_reuse = 1; |
89ff3147 |
2791 | ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars, |
a3684be1 |
2792 | arg, magic, need_op_saving, may_reuse); |
2793 | if (ret < 0) |
2794 | return ret; |
a652aa9f |
2795 | } |
e56ab892 |
2796 | |
5c024ef7 |
2797 | if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP) |
a652aa9f |
2798 | may_reuse = 1; |
de50b98b |
2799 | if (j > 0 && LAST_OP(j - 1)) { |
e56ab892 |
2800 | // follow last branch in reverse |
2801 | j = lr->i; |
2802 | continue; |
2803 | } |
2804 | need_op_saving = 1; |
89ff3147 |
2805 | ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars, |
a3684be1 |
2806 | arg, magic, need_op_saving, may_reuse); |
2807 | if (ret < 0) |
2808 | return ret; |
e56ab892 |
2809 | } |
2810 | j--; |
2811 | |
2812 | if (ops[j].op == OP_CALL) |
2813 | { |
89ff3147 |
2814 | if (pp->is_unresolved) |
2815 | break; |
2816 | |
092f64e1 |
2817 | pp_tmp = ops[j].pp; |
e56ab892 |
2818 | if (pp_tmp == NULL) |
7ae48d73 |
2819 | ferr(po, "arg collect hit unparsed call '%s'\n", |
2820 | ops[j].operand[0].name); |
a652aa9f |
2821 | if (may_reuse && pp_tmp->argc_stack > 0) |
de50b98b |
2822 | ferr(po, "arg collect %d/%d hit '%s' with %d stack args\n", |
2823 | arg, pp->argc, opr_name(&ops[j], 0), pp_tmp->argc_stack); |
e56ab892 |
2824 | } |
fdd5548a |
2825 | // esp adjust of 0 means we collected it before |
2826 | else if (ops[j].op == OP_ADD && ops[j].operand[0].reg == xSP |
2827 | && (ops[j].operand[1].type != OPT_CONST |
2828 | || ops[j].operand[1].val != 0)) |
2829 | { |
89ff3147 |
2830 | if (pp->is_unresolved) |
2831 | break; |
2832 | |
fdd5548a |
2833 | ferr(po, "arg collect %d/%d hit esp adjust of %d\n", |
2834 | arg, pp->argc, ops[j].operand[1].val); |
de50b98b |
2835 | } |
2836 | else if (ops[j].op == OP_POP) { |
89ff3147 |
2837 | if (pp->is_unresolved) |
2838 | break; |
2839 | |
de50b98b |
2840 | ferr(po, "arg collect %d/%d hit pop\n", arg, pp->argc); |
2841 | } |
5c024ef7 |
2842 | else if (ops[j].flags & OPF_CJMP) |
de50b98b |
2843 | { |
89ff3147 |
2844 | if (pp->is_unresolved) |
2845 | break; |
2846 | |
a652aa9f |
2847 | may_reuse = 1; |
de50b98b |
2848 | } |
2849 | else if (ops[j].op == OP_PUSH && !(ops[j].flags & OPF_FARG)) |
e56ab892 |
2850 | { |
89ff3147 |
2851 | if (pp->is_unresolved && (ops[j].flags & OPF_RMD)) |
2852 | break; |
2853 | |
e56ab892 |
2854 | pp->arg[arg].datap = &ops[j]; |
2b43685d |
2855 | need_to_save_current = 0; |
23fd0b11 |
2856 | save_args = 0; |
5f70a34f |
2857 | reg = -1; |
2858 | if (ops[j].operand[0].type == OPT_REG) |
2859 | reg = ops[j].operand[0].reg; |
2860 | |
e56ab892 |
2861 | if (!need_op_saving) { |
89ff3147 |
2862 | ret = scan_for_mod(&ops[j], j + 1, i, 1); |
2b43685d |
2863 | need_to_save_current = (ret >= 0); |
e56ab892 |
2864 | } |
2b43685d |
2865 | if (need_op_saving || need_to_save_current) { |
e56ab892 |
2866 | // mark this push as one that needs operand saving |
2867 | ops[j].flags &= ~OPF_RMD; |
5f70a34f |
2868 | if (ops[j].p_argnum == 0) { |
2869 | ops[j].p_argnum = arg + 1; |
23fd0b11 |
2870 | save_args |= 1 << arg; |
de50b98b |
2871 | } |
fdd5548a |
2872 | else if (ops[j].p_argnum < arg + 1) { |
2873 | // XXX: might kill valid var.. |
2874 | //*save_arg_vars &= ~(1 << (ops[j].p_argnum - 1)); |
2875 | ops[j].p_argnum = arg + 1; |
2876 | save_args |= 1 << arg; |
2877 | } |
e56ab892 |
2878 | } |
5f70a34f |
2879 | else if (ops[j].p_argnum == 0) |
e56ab892 |
2880 | ops[j].flags |= OPF_RMD; |
2881 | |
a652aa9f |
2882 | // some PUSHes are reused by different calls on other branches, |
de50b98b |
2883 | // but that can't happen if we didn't branch, so they |
2884 | // can be removed from future searches (handles nested calls) |
a652aa9f |
2885 | if (!may_reuse) |
de50b98b |
2886 | ops[j].flags |= OPF_FARG; |
2887 | |
da87ae38 |
2888 | ops[j].flags &= ~OPF_RSAVE; |
2889 | |
23fd0b11 |
2890 | // check for __VALIST |
5f70a34f |
2891 | if (!pp->is_unresolved && pp->arg[arg].type.is_va_list) { |
23fd0b11 |
2892 | k = -1; |
2893 | ret = resolve_origin(j, &ops[j].operand[0], magic + 1, &k); |
5f70a34f |
2894 | if (ret == 1 && k >= 0) |
23fd0b11 |
2895 | { |
5f70a34f |
2896 | if (ops[k].op == OP_LEA) { |
2897 | snprintf(buf, sizeof(buf), "arg_%X", |
2898 | g_func_pp->argc_stack * 4); |
2899 | if (!g_func_pp->is_vararg |
2900 | || strstr(ops[k].operand[1].name, buf)) |
2901 | { |
2902 | ops[k].flags |= OPF_RMD; |
2903 | ops[j].flags |= OPF_RMD | OPF_VAPUSH; |
2904 | save_args &= ~(1 << arg); |
2905 | reg = -1; |
2906 | } |
2907 | else |
2908 | ferr(&ops[j], "lea va_list used, but no vararg?\n"); |
2909 | } |
2910 | // check for va_list from g_func_pp arg too |
2911 | else if (ops[k].op == OP_MOV |
2912 | && is_stack_access(&ops[k], &ops[k].operand[1])) |
2913 | { |
2914 | ret = stack_frame_access(&ops[k], &ops[k].operand[1], |
2915 | buf, sizeof(buf), ops[k].operand[1].name, "", 1, 0); |
2916 | if (ret >= 0) { |
2917 | ops[k].flags |= OPF_RMD; |
2918 | ops[j].flags |= OPF_RMD; |
2919 | ops[j].p_argpass = ret + 1; |
2920 | save_args &= ~(1 << arg); |
2921 | reg = -1; |
2922 | } |
2923 | } |
23fd0b11 |
2924 | } |
2925 | } |
2926 | |
2927 | *save_arg_vars |= save_args; |
2928 | |
2929 | // tracking reg usage |
5f70a34f |
2930 | if (reg >= 0) |
2931 | *regmask |= 1 << reg; |
23fd0b11 |
2932 | |
89ff3147 |
2933 | arg++; |
2934 | if (!pp->is_unresolved) { |
2935 | // next arg |
2936 | for (; arg < pp->argc; arg++) |
2937 | if (pp->arg[arg].reg == NULL) |
2938 | break; |
2939 | } |
a3684be1 |
2940 | magic = (magic & 0xffffff) | (arg << 24); |
e56ab892 |
2941 | } |
2942 | } |
2943 | |
2944 | if (arg < pp->argc) { |
2945 | ferr(po, "arg collect failed for '%s': %d/%d\n", |
2946 | pp->name, arg, pp->argc); |
89ff3147 |
2947 | return -1; |
e56ab892 |
2948 | } |
89ff3147 |
2949 | |
2950 | return arg; |
2951 | } |
2952 | |
2953 | static int collect_call_args(struct parsed_op *po, int i, |
2954 | struct parsed_proto *pp, int *regmask, int *save_arg_vars, |
2955 | int magic) |
2956 | { |
2957 | int ret; |
2958 | int a; |
2959 | |
2960 | ret = collect_call_args_r(po, i, pp, regmask, save_arg_vars, |
2961 | 0, magic, 0, 0); |
2962 | if (ret < 0) |
2963 | return ret; |
2964 | |
2965 | if (pp->is_unresolved) { |
2966 | pp->argc += ret; |
2967 | pp->argc_stack += ret; |
2968 | for (a = 0; a < pp->argc; a++) |
2969 | if (pp->arg[a].type.name == NULL) |
2970 | pp->arg[a].type.name = strdup("int"); |
2971 | } |
2972 | |
e56ab892 |
2973 | return ret; |
2974 | } |
2975 | |
037f4971 |
2976 | // early check for tail call or branch back |
2977 | static int is_like_tailjmp(int j) |
2978 | { |
2979 | if (!(ops[j].flags & OPF_JMP)) |
2980 | return 0; |
2981 | |
2982 | if (ops[j].op == OP_JMP && !ops[j].operand[0].had_ds) |
2983 | // probably local branch back.. |
2984 | return 1; |
2985 | if (ops[j].op == OP_CALL) |
2986 | // probably noreturn call.. |
2987 | return 1; |
2988 | |
2989 | return 0; |
2990 | } |
2991 | |
89ff3147 |
2992 | static void pp_insert_reg_arg(struct parsed_proto *pp, const char *reg) |
2993 | { |
2994 | int i; |
2995 | |
2996 | for (i = 0; i < pp->argc; i++) |
2997 | if (pp->arg[i].reg == NULL) |
2998 | break; |
2999 | |
3000 | if (pp->argc_stack) |
3001 | memmove(&pp->arg[i + 1], &pp->arg[i], |
3002 | sizeof(pp->arg[0]) * pp->argc_stack); |
3003 | memset(&pp->arg[i], 0, sizeof(pp->arg[i])); |
3004 | pp->arg[i].reg = strdup(reg); |
3005 | pp->arg[i].type.name = strdup("int"); |
3006 | pp->argc++; |
3007 | pp->argc_reg++; |
3008 | } |
3009 | |
4c45fa73 |
3010 | static void add_label_ref(struct label_ref *lr, int op_i) |
3011 | { |
3012 | struct label_ref *lr_new; |
3013 | |
3014 | if (lr->i == -1) { |
3015 | lr->i = op_i; |
3016 | return; |
3017 | } |
3018 | |
3019 | lr_new = calloc(1, sizeof(*lr_new)); |
3020 | lr_new->i = op_i; |
a652aa9f |
3021 | lr_new->next = lr->next; |
4c45fa73 |
3022 | lr->next = lr_new; |
3023 | } |
3024 | |
04f8a628 |
3025 | static void output_std_flags(FILE *fout, struct parsed_op *po, |
3026 | int *pfomask, const char *dst_opr_text) |
3027 | { |
3028 | if (*pfomask & (1 << PFO_Z)) { |
3029 | fprintf(fout, "\n cond_z = (%s%s == 0);", |
3030 | lmod_cast_u(po, po->operand[0].lmod), dst_opr_text); |
3031 | *pfomask &= ~(1 << PFO_Z); |
3032 | } |
3033 | if (*pfomask & (1 << PFO_S)) { |
3034 | fprintf(fout, "\n cond_s = (%s%s < 0);", |
3035 | lmod_cast_s(po, po->operand[0].lmod), dst_opr_text); |
3036 | *pfomask &= ~(1 << PFO_S); |
3037 | } |
3038 | } |
3039 | |
c0050df6 |
3040 | static void output_pp_attrs(FILE *fout, const struct parsed_proto *pp, |
3041 | int is_noreturn) |
3042 | { |
3043 | if (pp->is_fastcall) |
3044 | fprintf(fout, "__fastcall "); |
3045 | else if (pp->is_stdcall && pp->argc_reg == 0) |
3046 | fprintf(fout, "__stdcall "); |
3047 | if (pp->is_noreturn || is_noreturn) |
3048 | fprintf(fout, "noreturn "); |
3049 | } |
3050 | |
91977a1c |
3051 | static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) |
3052 | { |
69a3cdfc |
3053 | struct parsed_op *po, *delayed_flag_op = NULL, *tmp_op; |
850c9265 |
3054 | struct parsed_opr *last_arith_dst = NULL; |
3ebea2cf |
3055 | char buf1[256], buf2[256], buf3[256], cast[64]; |
bd96f656 |
3056 | const struct parsed_proto *pp_c; |
ddaf8bd7 |
3057 | struct parsed_proto *pp, *pp_tmp; |
4c45fa73 |
3058 | struct parsed_data *pd; |
91977a1c |
3059 | const char *tmpname; |
1f84f6b3 |
3060 | unsigned int uval; |
69a3cdfc |
3061 | int save_arg_vars = 0; |
cb090db0 |
3062 | int cond_vars = 0; |
108e9fe3 |
3063 | int need_tmp_var = 0; |
2fe80fdb |
3064 | int need_tmp64 = 0; |
91977a1c |
3065 | int had_decl = 0; |
3ebea2cf |
3066 | int label_pending = 0; |
d4e3b5db |
3067 | int regmask_save = 0; |
91977a1c |
3068 | int regmask_arg = 0; |
a3684be1 |
3069 | int regmask_now = 0; |
ddaf8bd7 |
3070 | int regmask_init = 0; |
91977a1c |
3071 | int regmask = 0; |
940e8e66 |
3072 | int pfomask = 0; |
64c59faf |
3073 | int found = 0; |
d4e3b5db |
3074 | int depth = 0; |
91977a1c |
3075 | int no_output; |
4c45fa73 |
3076 | int i, j, l; |
91977a1c |
3077 | int arg; |
91977a1c |
3078 | int reg; |
3079 | int ret; |
3080 | |
1bafb621 |
3081 | g_bp_frame = g_sp_frame = g_stack_fsz = 0; |
a2c1d768 |
3082 | g_stack_frame_used = 0; |
91977a1c |
3083 | |
36595fd2 |
3084 | g_func_pp = proto_parse(fhdr, funcn, 0); |
bd96f656 |
3085 | if (g_func_pp == NULL) |
91977a1c |
3086 | ferr(ops, "proto_parse failed for '%s'\n", funcn); |
3087 | |
bd96f656 |
3088 | for (i = 0; i < g_func_pp->argc; i++) { |
89ff3147 |
3089 | if (g_func_pp->arg[i].reg != NULL) { |
3090 | reg = char_array_i(regs_r32, |
3091 | ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg); |
3092 | if (reg < 0) |
3093 | ferr(ops, "arg '%s' is not a reg?\n", g_func_pp->arg[i].reg); |
3094 | regmask_arg |= 1 << reg; |
3095 | } |
91977a1c |
3096 | } |
91977a1c |
3097 | |
3098 | // pass1: |
1bafb621 |
3099 | // - handle ebp/esp frame, remove ops related to it |
91977a1c |
3100 | if (ops[0].op == OP_PUSH && IS(opr_name(&ops[0], 0), "ebp") |
3101 | && ops[1].op == OP_MOV |
3102 | && IS(opr_name(&ops[1], 0), "ebp") |
3103 | && IS(opr_name(&ops[1], 1), "esp")) |
3104 | { |
87bf6cec |
3105 | int ecx_push = 0; |
3106 | |
91977a1c |
3107 | g_bp_frame = 1; |
69a3cdfc |
3108 | ops[0].flags |= OPF_RMD; |
3109 | ops[1].flags |= OPF_RMD; |
4c45fa73 |
3110 | i = 2; |
91977a1c |
3111 | |
3112 | if (ops[2].op == OP_SUB && IS(opr_name(&ops[2], 0), "esp")) { |
1bafb621 |
3113 | g_stack_fsz = opr_const(&ops[2], 1); |
69a3cdfc |
3114 | ops[2].flags |= OPF_RMD; |
4c45fa73 |
3115 | i++; |
91977a1c |
3116 | } |
87bf6cec |
3117 | else { |
3118 | // another way msvc builds stack frame.. |
3119 | i = 2; |
3120 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
1bafb621 |
3121 | g_stack_fsz += 4; |
87bf6cec |
3122 | ops[i].flags |= OPF_RMD; |
3123 | ecx_push++; |
3124 | i++; |
3125 | } |
4c45fa73 |
3126 | // and another way.. |
3127 | if (i == 2 && ops[i].op == OP_MOV && ops[i].operand[0].reg == xAX |
3128 | && ops[i].operand[1].type == OPT_CONST |
3129 | && ops[i + 1].op == OP_CALL |
3130 | && IS(opr_name(&ops[i + 1], 0), "__alloca_probe")) |
3131 | { |
3132 | g_stack_fsz += ops[i].operand[1].val; |
3133 | ops[i].flags |= OPF_RMD; |
3134 | i++; |
3135 | ops[i].flags |= OPF_RMD; |
3136 | i++; |
3137 | } |
87bf6cec |
3138 | } |
91977a1c |
3139 | |
64c59faf |
3140 | found = 0; |
91977a1c |
3141 | do { |
3142 | for (; i < opcnt; i++) |
3143 | if (ops[i].op == OP_RET) |
3144 | break; |
2fe80fdb |
3145 | j = i - 1; |
3146 | if (i == opcnt && (ops[j].flags & OPF_JMP)) { |
037f4971 |
3147 | if (found && is_like_tailjmp(j)) |
2fe80fdb |
3148 | break; |
2fe80fdb |
3149 | j--; |
3150 | } |
64c59faf |
3151 | |
2fe80fdb |
3152 | if ((ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ebp")) |
3153 | || ops[j].op == OP_LEAVE) |
591721d7 |
3154 | { |
2fe80fdb |
3155 | ops[j].flags |= OPF_RMD; |
591721d7 |
3156 | } |
e56ab892 |
3157 | else if (!(g_ida_func_attr & IDAFA_NORETURN)) |
2fe80fdb |
3158 | ferr(&ops[j], "'pop ebp' expected\n"); |
91977a1c |
3159 | |
1bafb621 |
3160 | if (g_stack_fsz != 0) { |
2fe80fdb |
3161 | if (ops[j - 1].op == OP_MOV |
3162 | && IS(opr_name(&ops[j - 1], 0), "esp") |
3163 | && IS(opr_name(&ops[j - 1], 1), "ebp")) |
91977a1c |
3164 | { |
2fe80fdb |
3165 | ops[j - 1].flags |= OPF_RMD; |
91977a1c |
3166 | } |
2fe80fdb |
3167 | else if (ops[j].op != OP_LEAVE |
591721d7 |
3168 | && !(g_ida_func_attr & IDAFA_NORETURN)) |
3169 | { |
2fe80fdb |
3170 | ferr(&ops[j - 1], "esp restore expected\n"); |
591721d7 |
3171 | } |
87bf6cec |
3172 | |
2fe80fdb |
3173 | if (ecx_push && ops[j - 2].op == OP_POP |
3174 | && IS(opr_name(&ops[j - 2], 0), "ecx")) |
87bf6cec |
3175 | { |
2fe80fdb |
3176 | ferr(&ops[j - 2], "unexpected ecx pop\n"); |
87bf6cec |
3177 | } |
91977a1c |
3178 | } |
87bf6cec |
3179 | |
64c59faf |
3180 | found = 1; |
91977a1c |
3181 | i++; |
3182 | } while (i < opcnt); |
3183 | } |
1bafb621 |
3184 | else { |
09bc6fd5 |
3185 | int ecx_push = 0, esp_sub = 0; |
3186 | |
3187 | i = 0; |
3188 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
3189 | ops[i].flags |= OPF_RMD; |
3190 | g_stack_fsz += 4; |
3191 | ecx_push++; |
3192 | i++; |
3193 | } |
3194 | |
3195 | for (; i < opcnt; i++) { |
1bafb621 |
3196 | if (ops[i].op == OP_PUSH || (ops[i].flags & (OPF_JMP|OPF_TAIL))) |
3197 | break; |
3198 | if (ops[i].op == OP_SUB && ops[i].operand[0].reg == xSP |
3199 | && ops[i].operand[1].type == OPT_CONST) |
3200 | { |
09bc6fd5 |
3201 | g_stack_fsz = ops[i].operand[1].val; |
3202 | ops[i].flags |= OPF_RMD; |
3203 | esp_sub = 1; |
1bafb621 |
3204 | break; |
3205 | } |
3206 | } |
3207 | |
037f4971 |
3208 | found = 0; |
09bc6fd5 |
3209 | if (ecx_push || esp_sub) |
1bafb621 |
3210 | { |
09bc6fd5 |
3211 | g_sp_frame = 1; |
1bafb621 |
3212 | |
3213 | i++; |
3214 | do { |
3215 | for (; i < opcnt; i++) |
3216 | if (ops[i].op == OP_RET) |
3217 | break; |
037f4971 |
3218 | j = i - 1; |
3219 | if (i == opcnt && (ops[j].flags & OPF_JMP)) { |
3220 | if (found && is_like_tailjmp(j)) |
3221 | break; |
3222 | j--; |
3223 | } |
1bafb621 |
3224 | |
09bc6fd5 |
3225 | if (ecx_push > 0) { |
3226 | for (l = 0; l < ecx_push; l++) { |
3227 | if (ops[j].op != OP_POP |
3228 | || !IS(opr_name(&ops[j], 0), "ecx")) |
3229 | { |
3230 | ferr(&ops[j], "'pop ecx' expected\n"); |
3231 | } |
3232 | ops[j].flags |= OPF_RMD; |
3233 | j--; |
3234 | } |
3235 | |
3236 | found = 1; |
3237 | } |
3238 | |
3239 | if (esp_sub) { |
3240 | if (ops[j].op != OP_ADD |
3241 | || !IS(opr_name(&ops[j], 0), "esp") |
3242 | || ops[j].operand[1].type != OPT_CONST |
3243 | || ops[j].operand[1].val != g_stack_fsz) |
3244 | ferr(&ops[j], "'add esp' expected\n"); |
3245 | ops[j].flags |= OPF_RMD; |
3246 | |
3247 | found = 1; |
3248 | } |
037f4971 |
3249 | |
1bafb621 |
3250 | i++; |
3251 | } while (i < opcnt); |
3252 | } |
3253 | } |
91977a1c |
3254 | |
3255 | // pass2: |
7ae48d73 |
3256 | // - parse calls with labels |
87bf6cec |
3257 | // - resolve all branches |
de50b98b |
3258 | for (i = 0; i < opcnt; i++) |
3259 | { |
87bf6cec |
3260 | po = &ops[i]; |
3261 | po->bt_i = -1; |
4c45fa73 |
3262 | po->btj = NULL; |
87bf6cec |
3263 | |
7ae48d73 |
3264 | if (po->flags & OPF_RMD) |
3265 | continue; |
3266 | |
3267 | if (po->op == OP_CALL) { |
ddaf8bd7 |
3268 | pp = NULL; |
3269 | |
7ae48d73 |
3270 | if (po->operand[0].type == OPT_LABEL) { |
3271 | tmpname = opr_name(po, 0); |
46411e6c |
3272 | if (IS_START(tmpname, "loc_")) |
3273 | ferr(po, "call to loc_*\n"); |
36595fd2 |
3274 | pp_c = proto_parse(fhdr, tmpname, 0); |
7ae48d73 |
3275 | if (pp_c == NULL) |
3276 | ferr(po, "proto_parse failed for call '%s'\n", tmpname); |
da87ae38 |
3277 | |
7ae48d73 |
3278 | pp = proto_clone(pp_c); |
3279 | my_assert_not(pp, NULL); |
ddaf8bd7 |
3280 | } |
3281 | else if (po->datap != NULL) { |
3282 | pp = calloc(1, sizeof(*pp)); |
3283 | my_assert_not(pp, NULL); |
3284 | |
3285 | ret = parse_protostr(po->datap, pp); |
3286 | if (ret < 0) |
3287 | ferr(po, "bad protostr supplied: %s\n", (char *)po->datap); |
3288 | free(po->datap); |
3289 | po->datap = NULL; |
3290 | } |
3291 | |
3292 | if (pp != NULL) { |
3293 | if (pp->is_fptr) |
3294 | check_func_pp(po, pp, "fptr var call"); |
3295 | if (pp->is_noreturn) |
3296 | po->flags |= OPF_TAIL; |
7ae48d73 |
3297 | } |
092f64e1 |
3298 | po->pp = pp; |
7ae48d73 |
3299 | continue; |
3300 | } |
3301 | |
3302 | if (!(po->flags & OPF_JMP) || po->op == OP_RET) |
87bf6cec |
3303 | continue; |
3304 | |
4c45fa73 |
3305 | if (po->operand[0].type == OPT_REGMEM) { |
3306 | char *p = strchr(po->operand[0].name, '['); |
3307 | if (p == NULL) |
89ff3147 |
3308 | goto tailcall; |
4c45fa73 |
3309 | ret = p - po->operand[0].name; |
3310 | strncpy(buf1, po->operand[0].name, ret); |
3311 | buf1[ret] = 0; |
3312 | |
3313 | for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) { |
3314 | if (IS(g_func_pd[j].label, buf1)) { |
3315 | pd = &g_func_pd[j]; |
3316 | break; |
3317 | } |
3318 | } |
3319 | if (pd == NULL) |
840257f6 |
3320 | //ferr(po, "label '%s' not parsed?\n", buf1); |
3321 | goto tailcall; |
4c45fa73 |
3322 | if (pd->type != OPT_OFFSET) |
3323 | ferr(po, "label '%s' with non-offset data?\n", buf1); |
3324 | |
3325 | // find all labels, link |
3326 | for (j = 0; j < pd->count; j++) { |
3327 | for (l = 0; l < opcnt; l++) { |
3328 | if (g_labels[l][0] && IS(g_labels[l], pd->d[j].u.label)) { |
3329 | add_label_ref(&g_label_refs[l], i); |
3330 | pd->d[j].bt_i = l; |
3331 | break; |
3332 | } |
3333 | } |
3334 | } |
3335 | |
3336 | po->btj = pd; |
3337 | continue; |
3338 | } |
3339 | |
3340 | for (l = 0; l < opcnt; l++) { |
3341 | if (g_labels[l][0] && IS(po->operand[0].name, g_labels[l])) { |
092f64e1 |
3342 | if (l == i + 1 && po->op == OP_JMP) { |
3343 | // yet another alignment type.. |
3344 | po->flags |= OPF_RMD; |
3345 | break; |
3346 | } |
4c45fa73 |
3347 | add_label_ref(&g_label_refs[l], i); |
3348 | po->bt_i = l; |
87bf6cec |
3349 | break; |
3350 | } |
3351 | } |
3352 | |
092f64e1 |
3353 | if (po->bt_i != -1 || (po->flags & OPF_RMD)) |
4c45fa73 |
3354 | continue; |
3355 | |
840257f6 |
3356 | if (po->operand[0].type == OPT_LABEL) |
87bf6cec |
3357 | // assume tail call |
840257f6 |
3358 | goto tailcall; |
4c45fa73 |
3359 | |
3360 | ferr(po, "unhandled branch\n"); |
840257f6 |
3361 | |
3362 | tailcall: |
3363 | po->op = OP_CALL; |
3364 | po->flags |= OPF_TAIL; |
2fe80fdb |
3365 | if (i > 0 && ops[i - 1].op == OP_POP) |
3366 | po->flags |= OPF_ATAIL; |
7ae48d73 |
3367 | i--; // reprocess |
87bf6cec |
3368 | } |
3369 | |
3370 | // pass3: |
a2c1d768 |
3371 | // - remove dead labels |
91977a1c |
3372 | // - process calls |
1bafb621 |
3373 | for (i = 0; i < opcnt; i++) |
3374 | { |
a2c1d768 |
3375 | if (g_labels[i][0] != 0 && g_label_refs[i].i == -1) |
3376 | g_labels[i][0] = 0; |
3377 | |
69a3cdfc |
3378 | po = &ops[i]; |
3379 | if (po->flags & OPF_RMD) |
91977a1c |
3380 | continue; |
850c9265 |
3381 | |
d4e3b5db |
3382 | if (po->op == OP_CALL) |
69a3cdfc |
3383 | { |
1bafb621 |
3384 | tmpname = opr_name(po, 0); |
092f64e1 |
3385 | pp = po->pp; |
7ae48d73 |
3386 | if (pp == NULL) |
1bafb621 |
3387 | { |
7ae48d73 |
3388 | // indirect call |
89ff3147 |
3389 | pp_c = resolve_icall(i, opcnt, &l); |
3390 | if (pp_c != NULL) { |
fe18709a |
3391 | if (!pp_c->is_func && !pp_c->is_fptr) |
3392 | ferr(po, "call to non-func: %s\n", pp_c->name); |
1cd4a663 |
3393 | pp = proto_clone(pp_c); |
89ff3147 |
3394 | my_assert_not(pp, NULL); |
3395 | if (l) |
3396 | // not resolved just to single func |
3397 | pp->is_fptr = 1; |
1f84f6b3 |
3398 | |
3399 | switch (po->operand[0].type) { |
3400 | case OPT_REG: |
037f4971 |
3401 | // we resolved this call and no longer need the register |
3402 | po->regmask_src &= ~(1 << po->operand[0].reg); |
1f84f6b3 |
3403 | break; |
3404 | case OPT_REGMEM: |
3405 | pp->is_fptr = 1; |
3406 | break; |
3407 | default: |
3408 | break; |
3409 | } |
89ff3147 |
3410 | } |
1cd4a663 |
3411 | if (pp == NULL) { |
3412 | pp = calloc(1, sizeof(*pp)); |
3413 | my_assert_not(pp, NULL); |
89ff3147 |
3414 | pp->is_fptr = 1; |
4741fdfe |
3415 | ret = scan_for_esp_adjust(i + 1, opcnt, &j, &l); |
89ff3147 |
3416 | if (ret < 0) { |
3417 | if (!g_allow_regfunc) |
3418 | ferr(po, "non-__cdecl indirect call unhandled yet\n"); |
3419 | pp->is_unresolved = 1; |
3420 | j = 0; |
3421 | } |
1cd4a663 |
3422 | j /= 4; |
3423 | if (j > ARRAY_SIZE(pp->arg)) |
89ff3147 |
3424 | ferr(po, "esp adjust too large: %d\n", j); |
1cd4a663 |
3425 | pp->ret_type.name = strdup("int"); |
3426 | pp->argc = pp->argc_stack = j; |
3427 | for (arg = 0; arg < pp->argc; arg++) |
3428 | pp->arg[arg].type.name = strdup("int"); |
3429 | } |
092f64e1 |
3430 | po->pp = pp; |
1bafb621 |
3431 | } |
3432 | |
7ba45c34 |
3433 | // look for and make use of esp adjust |
3434 | ret = -1; |
e56ab892 |
3435 | if (!pp->is_stdcall && pp->argc_stack > 0) |
4741fdfe |
3436 | ret = scan_for_esp_adjust(i + 1, opcnt, &j, &l); |
1bafb621 |
3437 | if (ret >= 0) { |
7ba45c34 |
3438 | if (pp->is_vararg) { |
3439 | if (j / 4 < pp->argc_stack) |
3440 | ferr(po, "esp adjust is too small: %x < %x\n", |
3441 | j, pp->argc_stack * 4); |
3442 | // modify pp to make it have varargs as normal args |
3443 | arg = pp->argc; |
3444 | pp->argc += j / 4 - pp->argc_stack; |
3445 | for (; arg < pp->argc; arg++) { |
3ebea2cf |
3446 | pp->arg[arg].type.name = strdup("int"); |
7ba45c34 |
3447 | pp->argc_stack++; |
3448 | } |
3449 | if (pp->argc > ARRAY_SIZE(pp->arg)) |
e56ab892 |
3450 | ferr(po, "too many args for '%s'\n", tmpname); |
7ba45c34 |
3451 | } |
1bafb621 |
3452 | if (pp->argc_stack != j / 4) |
e56ab892 |
3453 | ferr(po, "stack tracking failed for '%s': %x %x\n", |
3454 | tmpname, pp->argc_stack * 4, j); |
7ba45c34 |
3455 | |
1bafb621 |
3456 | ops[ret].flags |= OPF_RMD; |
591721d7 |
3457 | if (ops[ret].op == OP_POP && j > 4) { |
3458 | // deal with multi-pop stack adjust |
3459 | j = pp->argc_stack; |
3460 | while (ops[ret].op == OP_POP && j > 0 && ret < opcnt) { |
3461 | ops[ret].flags |= OPF_RMD; |
3462 | j--; |
3463 | ret++; |
3464 | } |
3465 | } |
4741fdfe |
3466 | else if (!l) { |
591721d7 |
3467 | // a bit of a hack, but deals with use of |
3468 | // single adj for multiple calls |
3469 | ops[ret].operand[1].val -= j; |
3470 | } |
1bafb621 |
3471 | } |
7ba45c34 |
3472 | else if (pp->is_vararg) |
3473 | ferr(po, "missing esp_adjust for vararg func '%s'\n", |
3474 | pp->name); |
91977a1c |
3475 | |
2fe80fdb |
3476 | if (!pp->is_unresolved && !(po->flags & OPF_ATAIL)) { |
89ff3147 |
3477 | // since we know the args, collect them |
3478 | collect_call_args(po, i, pp, ®mask, &save_arg_vars, |
3479 | i + opcnt * 2); |
3480 | } |
2b43685d |
3481 | |
3482 | if (strstr(pp->ret_type.name, "int64")) |
2fe80fdb |
3483 | need_tmp64 = 1; |
91977a1c |
3484 | } |
d4e3b5db |
3485 | } |
3486 | |
3487 | // pass4: |
3488 | // - find POPs for PUSHes, rm both |
591721d7 |
3489 | // - scan for STD/CLD, propagate DF |
d4e3b5db |
3490 | // - scan for all used registers |
3491 | // - find flag set ops for their users |
89ff3147 |
3492 | // - do unreselved calls |
1bafb621 |
3493 | // - declare indirect functions |
d4e3b5db |
3494 | for (i = 0; i < opcnt; i++) { |
3495 | po = &ops[i]; |
3496 | if (po->flags & OPF_RMD) |
3497 | continue; |
3498 | |
7ae48d73 |
3499 | if (po->op == OP_PUSH && (po->flags & OPF_RSAVE)) { |
3500 | reg = po->operand[0].reg; |
3501 | if (!(regmask & (1 << reg))) |
3502 | // not a reg save after all, rerun scan_for_pop |
3503 | po->flags &= ~OPF_RSAVE; |
3504 | else |
3505 | regmask_save |= 1 << reg; |
3506 | } |
3507 | |
5f70a34f |
3508 | if (po->op == OP_PUSH && po->p_argnum == 0 |
1f84f6b3 |
3509 | && !(po->flags & OPF_RSAVE) && !g_func_pp->is_userstack) |
d4e3b5db |
3510 | { |
5c024ef7 |
3511 | if (po->operand[0].type == OPT_REG) |
3512 | { |
3513 | reg = po->operand[0].reg; |
3514 | if (reg < 0) |
3515 | ferr(po, "reg not set for push?\n"); |
3516 | |
3517 | depth = 0; |
3518 | ret = scan_for_pop(i + 1, opcnt, |
3519 | po->operand[0].name, i + opcnt * 3, 0, &depth, 0); |
3520 | if (ret == 1) { |
3521 | if (depth > 1) |
3522 | ferr(po, "too much depth: %d\n", depth); |
3523 | |
3524 | po->flags |= OPF_RMD; |
3525 | scan_for_pop(i + 1, opcnt, po->operand[0].name, |
3526 | i + opcnt * 4, 0, &depth, 1); |
3527 | continue; |
3528 | } |
3529 | ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, 0); |
3530 | if (ret == 0) { |
3531 | arg = OPF_RMD; |
3532 | if (regmask & (1 << reg)) { |
3533 | if (regmask_save & (1 << reg)) |
3534 | ferr(po, "%s already saved?\n", po->operand[0].name); |
3535 | arg = OPF_RSAVE; |
3536 | } |
3537 | po->flags |= arg; |
3538 | scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, arg); |
3539 | continue; |
3540 | } |
d4e3b5db |
3541 | } |
5c024ef7 |
3542 | else if (po->operand[0].type == OPT_CONST) { |
3543 | for (j = i + 1; j < opcnt; j++) { |
3544 | if ((ops[j].flags & (OPF_JMP|OPF_TAIL|OPF_RSAVE)) |
3545 | || ops[j].op == OP_PUSH || g_labels[i][0] != 0) |
3546 | { |
3547 | break; |
3548 | } |
3549 | |
3550 | if (!(ops[j].flags & OPF_RMD) && ops[j].op == OP_POP) |
3551 | { |
3552 | po->flags |= OPF_RMD; |
3553 | ops[j].datap = po; |
3554 | break; |
3555 | } |
d4e3b5db |
3556 | } |
d4e3b5db |
3557 | } |
3558 | } |
3559 | |
591721d7 |
3560 | if (po->op == OP_STD) { |
3561 | po->flags |= OPF_DF | OPF_RMD; |
3562 | scan_propagate_df(i + 1, opcnt); |
3563 | } |
3564 | |
a3684be1 |
3565 | regmask_now = po->regmask_src | po->regmask_dst; |
3566 | if (regmask_now & (1 << xBP)) { |
3567 | if (g_bp_frame && !(po->flags & OPF_EBP_S)) { |
3568 | if (po->regmask_dst & (1 << xBP)) |
3569 | // compiler decided to drop bp frame and use ebp as scratch |
037f4971 |
3570 | scan_fwd_set_flags(i + 1, opcnt, i + opcnt * 5, OPF_EBP_S); |
a3684be1 |
3571 | else |
3572 | regmask_now &= ~(1 << xBP); |
3573 | } |
3574 | } |
3575 | |
3576 | regmask |= regmask_now; |
d4e3b5db |
3577 | |
3578 | if (po->flags & OPF_CC) |
3579 | { |
2b43685d |
3580 | int setters[16], cnt = 0, branched = 0; |
3581 | |
04f8a628 |
3582 | ret = scan_for_flag_set(i, i + opcnt * 6, |
3583 | &branched, setters, &cnt); |
2b43685d |
3584 | if (ret < 0 || cnt <= 0) |
3585 | ferr(po, "unable to trace flag setter(s)\n"); |
3586 | if (cnt > ARRAY_SIZE(setters)) |
3587 | ferr(po, "too many flag setters\n"); |
d4e3b5db |
3588 | |
2b43685d |
3589 | for (j = 0; j < cnt; j++) |
3590 | { |
3591 | tmp_op = &ops[setters[j]]; // flag setter |
3592 | pfomask = 0; |
3593 | |
3594 | // to get nicer code, we try to delay test and cmp; |
3595 | // if we can't because of operand modification, or if we |
591721d7 |
3596 | // have arith op, or branch, make it calculate flags explicitly |
3597 | if (tmp_op->op == OP_TEST || tmp_op->op == OP_CMP) |
3598 | { |
89ff3147 |
3599 | if (branched || scan_for_mod(tmp_op, setters[j] + 1, i, 0) >= 0) |
092f64e1 |
3600 | pfomask = 1 << po->pfo; |
2b43685d |
3601 | } |
4741fdfe |
3602 | else if (tmp_op->op == OP_CMPS || tmp_op->op == OP_SCAS) { |
092f64e1 |
3603 | pfomask = 1 << po->pfo; |
591721d7 |
3604 | } |
2b43685d |
3605 | else { |
04f8a628 |
3606 | // see if we'll be able to handle based on op result |
3607 | if ((tmp_op->op != OP_AND && tmp_op->op != OP_OR |
092f64e1 |
3608 | && po->pfo != PFO_Z && po->pfo != PFO_S |
3609 | && po->pfo != PFO_P) |
04f8a628 |
3610 | || branched |
2b43685d |
3611 | || scan_for_mod_opr0(tmp_op, setters[j] + 1, i) >= 0) |
092f64e1 |
3612 | { |
3613 | pfomask = 1 << po->pfo; |
3614 | } |
2fe80fdb |
3615 | |
c8dbc5be |
3616 | if (tmp_op->op == OP_ADD && po->pfo == PFO_C) { |
3617 | propagate_lmod(tmp_op, &tmp_op->operand[0], |
3618 | &tmp_op->operand[1]); |
3619 | if (tmp_op->operand[0].lmod == OPLM_DWORD) |
3620 | need_tmp64 = 1; |
3621 | } |
2b43685d |
3622 | } |
3623 | if (pfomask) { |
3624 | tmp_op->pfomask |= pfomask; |
cb090db0 |
3625 | cond_vars |= pfomask; |
2b43685d |
3626 | } |
04f8a628 |
3627 | // note: may overwrite, currently not a problem |
3628 | po->datap = tmp_op; |
d4e3b5db |
3629 | } |
3630 | |
cb090db0 |
3631 | if (po->op == OP_RCL || po->op == OP_RCR |
3632 | || po->op == OP_ADC || po->op == OP_SBB) |
3633 | cond_vars |= 1 << PFO_C; |
d4e3b5db |
3634 | } |
092f64e1 |
3635 | |
3636 | if (po->op == OP_CMPS || po->op == OP_SCAS) { |
cb090db0 |
3637 | cond_vars |= 1 << PFO_Z; |
591721d7 |
3638 | } |
87bf6cec |
3639 | else if (po->op == OP_MUL |
3640 | || (po->op == OP_IMUL && po->operand_cnt == 1)) |
3641 | { |
c8dbc5be |
3642 | if (po->operand[0].lmod == OPLM_DWORD) |
3643 | need_tmp64 = 1; |
87bf6cec |
3644 | } |
89ff3147 |
3645 | else if (po->op == OP_CALL) { |
092f64e1 |
3646 | pp = po->pp; |
89ff3147 |
3647 | if (pp == NULL) |
3648 | ferr(po, "NULL pp\n"); |
3649 | |
3650 | if (pp->is_unresolved) { |
ddaf8bd7 |
3651 | int regmask_stack = 0; |
b74c31e3 |
3652 | collect_call_args(po, i, pp, ®mask, &save_arg_vars, |
89ff3147 |
3653 | i + opcnt * 2); |
3654 | |
b74c31e3 |
3655 | // this is pretty rough guess: |
3656 | // see ecx and edx were pushed (and not their saved versions) |
3657 | for (arg = 0; arg < pp->argc; arg++) { |
3658 | if (pp->arg[arg].reg != NULL) |
3659 | continue; |
3660 | |
3661 | tmp_op = pp->arg[arg].datap; |
3662 | if (tmp_op == NULL) |
3663 | ferr(po, "parsed_op missing for arg%d\n", arg); |
5f70a34f |
3664 | if (tmp_op->p_argnum == 0 && tmp_op->operand[0].type == OPT_REG) |
b74c31e3 |
3665 | regmask_stack |= 1 << tmp_op->operand[0].reg; |
3666 | } |
3667 | |
ddaf8bd7 |
3668 | if (!((regmask_stack & (1 << xCX)) |
3669 | && (regmask_stack & (1 << xDX)))) |
89ff3147 |
3670 | { |
3671 | if (pp->argc_stack != 0 |
c0050df6 |
3672 | || ((regmask | regmask_arg) & ((1 << xCX)|(1 << xDX)))) |
89ff3147 |
3673 | { |
3674 | pp_insert_reg_arg(pp, "ecx"); |
c0050df6 |
3675 | pp->is_fastcall = 1; |
ddaf8bd7 |
3676 | regmask_init |= 1 << xCX; |
89ff3147 |
3677 | regmask |= 1 << xCX; |
3678 | } |
3679 | if (pp->argc_stack != 0 |
3680 | || ((regmask | regmask_arg) & (1 << xDX))) |
3681 | { |
3682 | pp_insert_reg_arg(pp, "edx"); |
ddaf8bd7 |
3683 | regmask_init |= 1 << xDX; |
89ff3147 |
3684 | regmask |= 1 << xDX; |
3685 | } |
3686 | } |
c0050df6 |
3687 | |
3688 | // note: __cdecl doesn't fall into is_unresolved category |
3689 | if (pp->argc_stack > 0) |
3690 | pp->is_stdcall = 1; |
ddaf8bd7 |
3691 | } |
3692 | |
3693 | for (arg = 0; arg < pp->argc; arg++) { |
3694 | if (pp->arg[arg].reg != NULL) { |
3695 | reg = char_array_i(regs_r32, |
3696 | ARRAY_SIZE(regs_r32), pp->arg[arg].reg); |
3697 | if (reg < 0) |
3698 | ferr(ops, "arg '%s' is not a reg?\n", pp->arg[arg].reg); |
3699 | if (!(regmask & (1 << reg))) { |
3700 | regmask_init |= 1 << reg; |
3701 | regmask |= 1 << reg; |
3702 | } |
3703 | } |
89ff3147 |
3704 | } |
1bafb621 |
3705 | } |
27ebfaed |
3706 | else if (po->op == OP_MOV && po->operand[0].pp != NULL |
3707 | && po->operand[1].pp != NULL) |
3708 | { |
3709 | // <var> = offset <something> |
3710 | if ((po->operand[1].pp->is_func || po->operand[1].pp->is_fptr) |
3711 | && !IS_START(po->operand[1].name, "off_")) |
3712 | { |
3713 | if (!po->operand[0].pp->is_fptr) |
3714 | ferr(po, "%s not declared as fptr when it should be\n", |
3715 | po->operand[0].name); |
3716 | if (pp_cmp_func(po->operand[0].pp, po->operand[1].pp)) { |
3717 | pp_print(buf1, sizeof(buf1), po->operand[0].pp); |
3718 | pp_print(buf2, sizeof(buf2), po->operand[1].pp); |
3719 | fnote(po, "var: %s\n", buf1); |
3720 | fnote(po, "func: %s\n", buf2); |
3721 | ferr(po, "^ mismatch\n"); |
3722 | } |
3723 | } |
3724 | } |
75ad0378 |
3725 | else if (po->op == OP_RET && !IS(g_func_pp->ret_type.name, "void")) |
3726 | regmask |= 1 << xAX; |
cb090db0 |
3727 | else if (po->op == OP_DIV || po->op == OP_IDIV) { |
3728 | // 32bit division is common, look for it |
3729 | if (po->op == OP_DIV) |
3730 | ret = scan_for_reg_clear(i, xDX); |
3731 | else |
3732 | ret = scan_for_cdq_edx(i); |
3733 | if (ret >= 0) |
3734 | po->flags |= OPF_32BIT; |
3735 | else |
3736 | need_tmp64 = 1; |
3737 | } |
037f4971 |
3738 | else if (po->op == OP_CLD) |
3739 | po->flags |= OPF_RMD; |
cb090db0 |
3740 | |
3741 | if (po->op == OP_RCL || po->op == OP_RCR || po->op == OP_XCHG) { |
3742 | need_tmp_var = 1; |
3743 | } |
91977a1c |
3744 | } |
3745 | |
da87ae38 |
3746 | // pass4: |
3747 | // - confirm regmask_save, it might have been reduced |
3748 | if (regmask_save != 0) |
3749 | { |
3750 | regmask_save = 0; |
3751 | for (i = 0; i < opcnt; i++) { |
3752 | po = &ops[i]; |
3753 | if (po->flags & OPF_RMD) |
3754 | continue; |
3755 | |
3756 | if (po->op == OP_PUSH && (po->flags & OPF_RSAVE)) |
3757 | regmask_save |= 1 << po->operand[0].reg; |
3758 | } |
3759 | } |
3760 | |
60fe410c |
3761 | // output starts here |
3762 | |
3763 | // define userstack size |
3764 | if (g_func_pp->is_userstack) { |
3765 | fprintf(fout, "#ifndef US_SZ_%s\n", g_func_pp->name); |
3766 | fprintf(fout, "#define US_SZ_%s USERSTACK_SIZE\n", g_func_pp->name); |
3767 | fprintf(fout, "#endif\n"); |
3768 | } |
3769 | |
3770 | // the function itself |
3771 | fprintf(fout, "%s ", g_func_pp->ret_type.name); |
3772 | output_pp_attrs(fout, g_func_pp, g_ida_func_attr & IDAFA_NORETURN); |
3773 | fprintf(fout, "%s(", g_func_pp->name); |
3774 | |
3775 | for (i = 0; i < g_func_pp->argc; i++) { |
3776 | if (i > 0) |
3777 | fprintf(fout, ", "); |
3778 | if (g_func_pp->arg[i].fptr != NULL) { |
3779 | // func pointer.. |
3780 | pp = g_func_pp->arg[i].fptr; |
3781 | fprintf(fout, "%s (", pp->ret_type.name); |
3782 | output_pp_attrs(fout, pp, 0); |
3783 | fprintf(fout, "*a%d)(", i + 1); |
3784 | for (j = 0; j < pp->argc; j++) { |
3785 | if (j > 0) |
3786 | fprintf(fout, ", "); |
3787 | if (pp->arg[j].fptr) |
3788 | ferr(ops, "nested fptr\n"); |
3789 | fprintf(fout, "%s", pp->arg[j].type.name); |
3790 | } |
3791 | if (pp->is_vararg) { |
3792 | if (j > 0) |
3793 | fprintf(fout, ", "); |
3794 | fprintf(fout, "..."); |
3795 | } |
3796 | fprintf(fout, ")"); |
3797 | } |
3798 | else if (g_func_pp->arg[i].type.is_retreg) { |
3799 | fprintf(fout, "u32 *r_%s", g_func_pp->arg[i].reg); |
3800 | } |
3801 | else { |
3802 | fprintf(fout, "%s a%d", g_func_pp->arg[i].type.name, i + 1); |
3803 | } |
3804 | } |
3805 | if (g_func_pp->is_vararg) { |
3806 | if (i > 0) |
3807 | fprintf(fout, ", "); |
3808 | fprintf(fout, "..."); |
3809 | } |
3810 | |
3811 | fprintf(fout, ")\n{\n"); |
3812 | |
3813 | // declare indirect functions |
3814 | for (i = 0; i < opcnt; i++) { |
3815 | po = &ops[i]; |
3816 | if (po->flags & OPF_RMD) |
3817 | continue; |
3818 | |
3819 | if (po->op == OP_CALL) { |
3820 | pp = po->pp; |
3821 | if (pp == NULL) |
3822 | ferr(po, "NULL pp\n"); |
3823 | |
3824 | if (pp->is_fptr && !(pp->name[0] != 0 && pp->is_arg)) { |
3825 | if (pp->name[0] != 0) { |
3826 | memmove(pp->name + 2, pp->name, strlen(pp->name) + 1); |
3827 | memcpy(pp->name, "i_", 2); |
3828 | |
3829 | // might be declared already |
3830 | found = 0; |
3831 | for (j = 0; j < i; j++) { |
3832 | if (ops[j].op == OP_CALL && (pp_tmp = ops[j].pp)) { |
3833 | if (pp_tmp->is_fptr && IS(pp->name, pp_tmp->name)) { |
3834 | found = 1; |
3835 | break; |
3836 | } |
3837 | } |
3838 | } |
3839 | if (found) |
3840 | continue; |
3841 | } |
3842 | else |
3843 | snprintf(pp->name, sizeof(pp->name), "icall%d", i); |
3844 | |
3845 | fprintf(fout, " %s (", pp->ret_type.name); |
3846 | output_pp_attrs(fout, pp, 0); |
3847 | fprintf(fout, "*%s)(", pp->name); |
3848 | for (j = 0; j < pp->argc; j++) { |
3849 | if (j > 0) |
3850 | fprintf(fout, ", "); |
3851 | fprintf(fout, "%s a%d", pp->arg[j].type.name, j + 1); |
3852 | } |
3853 | fprintf(fout, ");\n"); |
3854 | } |
3855 | } |
3856 | } |
da87ae38 |
3857 | |
4c45fa73 |
3858 | // output LUTs/jumptables |
3859 | for (i = 0; i < g_func_pd_cnt; i++) { |
3860 | pd = &g_func_pd[i]; |
3861 | fprintf(fout, " static const "); |
3862 | if (pd->type == OPT_OFFSET) { |
3863 | fprintf(fout, "void *jt_%s[] =\n { ", pd->label); |
3864 | |
3865 | for (j = 0; j < pd->count; j++) { |
3866 | if (j > 0) |
3867 | fprintf(fout, ", "); |
3868 | fprintf(fout, "&&%s", pd->d[j].u.label); |
3869 | } |
3870 | } |
3871 | else { |
3872 | fprintf(fout, "%s %s[] =\n { ", |
3873 | lmod_type_u(ops, pd->lmod), pd->label); |
3874 | |
3875 | for (j = 0; j < pd->count; j++) { |
3876 | if (j > 0) |
3877 | fprintf(fout, ", "); |
3878 | fprintf(fout, "%u", pd->d[j].u.val); |
3879 | } |
3880 | } |
3881 | fprintf(fout, " };\n"); |
1f84f6b3 |
3882 | had_decl = 1; |
4c45fa73 |
3883 | } |
3884 | |
4f12f671 |
3885 | // declare stack frame, va_arg |
1f84f6b3 |
3886 | if (g_stack_fsz) { |
850c9265 |
3887 | fprintf(fout, " union { u32 d[%d]; u16 w[%d]; u8 b[%d]; } sf;\n", |
1bafb621 |
3888 | (g_stack_fsz + 3) / 4, (g_stack_fsz + 1) / 2, g_stack_fsz); |
1f84f6b3 |
3889 | had_decl = 1; |
3890 | } |
3891 | |
3892 | if (g_func_pp->is_userstack) { |
60fe410c |
3893 | fprintf(fout, " u32 fake_sf[US_SZ_%s / 4];\n", g_func_pp->name); |
3894 | fprintf(fout, " u32 *esp = &fake_sf[sizeof(fake_sf) / 4];\n"); |
1f84f6b3 |
3895 | had_decl = 1; |
3896 | } |
850c9265 |
3897 | |
1f84f6b3 |
3898 | if (g_func_pp->is_vararg) { |
4f12f671 |
3899 | fprintf(fout, " va_list ap;\n"); |
1f84f6b3 |
3900 | had_decl = 1; |
3901 | } |
4f12f671 |
3902 | |
940e8e66 |
3903 | // declare arg-registers |
bd96f656 |
3904 | for (i = 0; i < g_func_pp->argc; i++) { |
3905 | if (g_func_pp->arg[i].reg != NULL) { |
91977a1c |
3906 | reg = char_array_i(regs_r32, |
bd96f656 |
3907 | ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg); |
75ad0378 |
3908 | if (regmask & (1 << reg)) { |
1f84f6b3 |
3909 | if (g_func_pp->arg[i].type.is_retreg) |
3910 | fprintf(fout, " u32 %s = *r_%s;\n", |
3911 | g_func_pp->arg[i].reg, g_func_pp->arg[i].reg); |
3912 | else |
3913 | fprintf(fout, " u32 %s = (u32)a%d;\n", |
3914 | g_func_pp->arg[i].reg, i + 1); |
75ad0378 |
3915 | } |
1f84f6b3 |
3916 | else { |
3917 | if (g_func_pp->arg[i].type.is_retreg) |
3918 | ferr(ops, "retreg '%s' is unused?\n", |
3919 | g_func_pp->arg[i].reg); |
75ad0378 |
3920 | fprintf(fout, " // %s = a%d; // unused\n", |
3921 | g_func_pp->arg[i].reg, i + 1); |
1f84f6b3 |
3922 | } |
91977a1c |
3923 | had_decl = 1; |
3924 | } |
3925 | } |
3926 | |
75ad0378 |
3927 | regmask_now = regmask & ~regmask_arg; |
3928 | regmask_now &= ~(1 << xSP); |
90307a99 |
3929 | if (regmask_now & 0x00ff) { |
91977a1c |
3930 | for (reg = 0; reg < 8; reg++) { |
75ad0378 |
3931 | if (regmask_now & (1 << reg)) { |
ddaf8bd7 |
3932 | fprintf(fout, " u32 %s", regs_r32[reg]); |
3933 | if (regmask_init & (1 << reg)) |
3934 | fprintf(fout, " = 0"); |
3935 | fprintf(fout, ";\n"); |
91977a1c |
3936 | had_decl = 1; |
3937 | } |
3938 | } |
3939 | } |
90307a99 |
3940 | if (regmask_now & 0xff00) { |
3941 | for (reg = 8; reg < 16; reg++) { |
3942 | if (regmask_now & (1 << reg)) { |
3943 | fprintf(fout, " mmxr %s", regs_r32[reg]); |
3944 | if (regmask_init & (1 << reg)) |
3945 | fprintf(fout, " = { 0, }"); |
3946 | fprintf(fout, ";\n"); |
3947 | had_decl = 1; |
3948 | } |
3949 | } |
3950 | } |
91977a1c |
3951 | |
d4e3b5db |
3952 | if (regmask_save) { |
3953 | for (reg = 0; reg < 8; reg++) { |
3954 | if (regmask_save & (1 << reg)) { |
3955 | fprintf(fout, " u32 s_%s;\n", regs_r32[reg]); |
3956 | had_decl = 1; |
3957 | } |
3958 | } |
3959 | } |
3960 | |
69a3cdfc |
3961 | if (save_arg_vars) { |
3962 | for (reg = 0; reg < 32; reg++) { |
3963 | if (save_arg_vars & (1 << reg)) { |
3964 | fprintf(fout, " u32 s_a%d;\n", reg + 1); |
3965 | had_decl = 1; |
3966 | } |
3967 | } |
3968 | } |
3969 | |
cb090db0 |
3970 | if (cond_vars) { |
69a3cdfc |
3971 | for (i = 0; i < 8; i++) { |
cb090db0 |
3972 | if (cond_vars & (1 << i)) { |
69a3cdfc |
3973 | fprintf(fout, " u32 cond_%s;\n", parsed_flag_op_names[i]); |
3974 | had_decl = 1; |
3975 | } |
3976 | } |
3977 | } |
3978 | |
108e9fe3 |
3979 | if (need_tmp_var) { |
3980 | fprintf(fout, " u32 tmp;\n"); |
3981 | had_decl = 1; |
3982 | } |
3983 | |
2fe80fdb |
3984 | if (need_tmp64) { |
3985 | fprintf(fout, " u64 tmp64;\n"); |
87bf6cec |
3986 | had_decl = 1; |
3987 | } |
3988 | |
91977a1c |
3989 | if (had_decl) |
3990 | fprintf(fout, "\n"); |
3991 | |
bd96f656 |
3992 | if (g_func_pp->is_vararg) { |
3993 | if (g_func_pp->argc_stack == 0) |
4f12f671 |
3994 | ferr(ops, "vararg func without stack args?\n"); |
bd96f656 |
3995 | fprintf(fout, " va_start(ap, a%d);\n", g_func_pp->argc); |
4f12f671 |
3996 | } |
3997 | |
91977a1c |
3998 | // output ops |
69a3cdfc |
3999 | for (i = 0; i < opcnt; i++) |
4000 | { |
a2c1d768 |
4001 | if (g_labels[i][0] != 0) { |
91977a1c |
4002 | fprintf(fout, "\n%s:\n", g_labels[i]); |
3ebea2cf |
4003 | label_pending = 1; |
2b43685d |
4004 | |
4005 | delayed_flag_op = NULL; |
4006 | last_arith_dst = NULL; |
3ebea2cf |
4007 | } |
91977a1c |
4008 | |
69a3cdfc |
4009 | po = &ops[i]; |
4010 | if (po->flags & OPF_RMD) |
91977a1c |
4011 | continue; |
4012 | |
4013 | no_output = 0; |
4014 | |
91977a1c |
4015 | #define assert_operand_cnt(n_) \ |
850c9265 |
4016 | if (po->operand_cnt != n_) \ |
4017 | ferr(po, "operand_cnt is %d/%d\n", po->operand_cnt, n_) |
4018 | |
69a3cdfc |
4019 | // conditional/flag using op? |
4020 | if (po->flags & OPF_CC) |
850c9265 |
4021 | { |
940e8e66 |
4022 | int is_delayed = 0; |
69a3cdfc |
4023 | |
04f8a628 |
4024 | tmp_op = po->datap; |
850c9265 |
4025 | |
69a3cdfc |
4026 | // we go through all this trouble to avoid using parsed_flag_op, |
4027 | // which makes generated code much nicer |
4028 | if (delayed_flag_op != NULL) |
850c9265 |
4029 | { |
092f64e1 |
4030 | out_cmp_test(buf1, sizeof(buf1), delayed_flag_op, |
4031 | po->pfo, po->pfo_inv); |
940e8e66 |
4032 | is_delayed = 1; |
91977a1c |
4033 | } |
850c9265 |
4034 | else if (last_arith_dst != NULL |
092f64e1 |
4035 | && (po->pfo == PFO_Z || po->pfo == PFO_S || po->pfo == PFO_P |
04f8a628 |
4036 | || (tmp_op && (tmp_op->op == OP_AND || tmp_op->op == OP_OR)) |
4037 | )) |
850c9265 |
4038 | { |
3ebea2cf |
4039 | out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst); |
092f64e1 |
4040 | out_test_for_cc(buf1, sizeof(buf1), po, po->pfo, po->pfo_inv, |
850c9265 |
4041 | last_arith_dst->lmod, buf3); |
940e8e66 |
4042 | is_delayed = 1; |
850c9265 |
4043 | } |
04f8a628 |
4044 | else if (tmp_op != NULL) { |
7ba45c34 |
4045 | // use preprocessed flag calc results |
092f64e1 |
4046 | if (!(tmp_op->pfomask & (1 << po->pfo))) |
4047 | ferr(po, "not prepared for pfo %d\n", po->pfo); |
69a3cdfc |
4048 | |
092f64e1 |
4049 | // note: pfo_inv was not yet applied |
69a3cdfc |
4050 | snprintf(buf1, sizeof(buf1), "(%scond_%s)", |
092f64e1 |
4051 | po->pfo_inv ? "!" : "", parsed_flag_op_names[po->pfo]); |
69a3cdfc |
4052 | } |
4053 | else { |
4054 | ferr(po, "all methods of finding comparison failed\n"); |
4055 | } |
850c9265 |
4056 | |
69a3cdfc |
4057 | if (po->flags & OPF_JMP) { |
092f64e1 |
4058 | fprintf(fout, " if %s", buf1); |
850c9265 |
4059 | } |
cb090db0 |
4060 | else if (po->op == OP_RCL || po->op == OP_RCR |
4061 | || po->op == OP_ADC || po->op == OP_SBB) |
4062 | { |
940e8e66 |
4063 | if (is_delayed) |
4064 | fprintf(fout, " cond_%s = %s;\n", |
092f64e1 |
4065 | parsed_flag_op_names[po->pfo], buf1); |
850c9265 |
4066 | } |
5101a5f9 |
4067 | else if (po->flags & OPF_DATA) { // SETcc |
850c9265 |
4068 | out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]); |
4069 | fprintf(fout, " %s = %s;", buf2, buf1); |
91977a1c |
4070 | } |
69a3cdfc |
4071 | else { |
4072 | ferr(po, "unhandled conditional op\n"); |
4073 | } |
91977a1c |
4074 | } |
4075 | |
940e8e66 |
4076 | pfomask = po->pfomask; |
4077 | |
4741fdfe |
4078 | if (po->flags & (OPF_REPZ|OPF_REPNZ)) { |
1f84f6b3 |
4079 | struct parsed_opr opr = {0,}; |
4080 | opr.type = OPT_REG; |
4081 | opr.reg = xCX; |
4082 | opr.lmod = OPLM_DWORD; |
4083 | ret = try_resolve_const(i, &opr, opcnt * 7 + i, &uval); |
4084 | |
4085 | if (ret != 1 || uval == 0) { |
4086 | // we need initial flags for ecx=0 case.. |
4087 | if (i > 0 && ops[i - 1].op == OP_XOR |
4088 | && IS(ops[i - 1].operand[0].name, |
4089 | ops[i - 1].operand[1].name)) |
4090 | { |
4091 | fprintf(fout, " cond_z = "); |
4092 | if (pfomask & (1 << PFO_C)) |
4093 | fprintf(fout, "cond_c = "); |
4094 | fprintf(fout, "0;\n"); |
4095 | } |
4096 | else if (last_arith_dst != NULL) { |
4097 | out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst); |
4098 | out_test_for_cc(buf1, sizeof(buf1), po, PFO_Z, 0, |
4099 | last_arith_dst->lmod, buf3); |
4100 | fprintf(fout, " cond_z = %s;\n", buf1); |
4101 | } |
4102 | else |
4103 | ferr(po, "missing initial ZF\n"); |
4741fdfe |
4104 | } |
4741fdfe |
4105 | } |
4106 | |
850c9265 |
4107 | switch (po->op) |
91977a1c |
4108 | { |
4109 | case OP_MOV: |
4110 | assert_operand_cnt(2); |
850c9265 |
4111 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
de50b98b |
4112 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
c7ed83dd |
4113 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]); |
de50b98b |
4114 | fprintf(fout, " %s = %s;", buf1, |
3ebea2cf |
4115 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
c7ed83dd |
4116 | buf3, 0)); |
850c9265 |
4117 | break; |
4118 | |
4119 | case OP_LEA: |
4120 | assert_operand_cnt(2); |
87bf6cec |
4121 | po->operand[1].lmod = OPLM_DWORD; // always |
850c9265 |
4122 | fprintf(fout, " %s = %s;", |
4123 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
4124 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
4125 | NULL, 1)); |
850c9265 |
4126 | break; |
4127 | |
4128 | case OP_MOVZX: |
4129 | assert_operand_cnt(2); |
91977a1c |
4130 | fprintf(fout, " %s = %s;", |
850c9265 |
4131 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
4132 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
850c9265 |
4133 | break; |
4134 | |
4135 | case OP_MOVSX: |
4136 | assert_operand_cnt(2); |
4137 | switch (po->operand[1].lmod) { |
4138 | case OPLM_BYTE: |
4139 | strcpy(buf3, "(s8)"); |
4140 | break; |
4141 | case OPLM_WORD: |
4142 | strcpy(buf3, "(s16)"); |
4143 | break; |
4144 | default: |
4145 | ferr(po, "invalid src lmod: %d\n", po->operand[1].lmod); |
4146 | } |
a2c1d768 |
4147 | fprintf(fout, " %s = %s;", |
850c9265 |
4148 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
a2c1d768 |
4149 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
4150 | buf3, 0)); |
850c9265 |
4151 | break; |
4152 | |
108e9fe3 |
4153 | case OP_XCHG: |
4154 | assert_operand_cnt(2); |
4155 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
4156 | fprintf(fout, " tmp = %s;", |
4157 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], "", 0)); |
4158 | fprintf(fout, " %s = %s;", |
4159 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
c7ed83dd |
4160 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
4161 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0)); |
4162 | fprintf(fout, " %s = %stmp;", |
4163 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[1]), |
4164 | default_cast_to(buf3, sizeof(buf3), &po->operand[1])); |
108e9fe3 |
4165 | snprintf(g_comment, sizeof(g_comment), "xchg"); |
4166 | break; |
4167 | |
850c9265 |
4168 | case OP_NOT: |
4169 | assert_operand_cnt(1); |
4170 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
4171 | fprintf(fout, " %s = ~%s;", buf1, buf1); |
4172 | break; |
4173 | |
5101a5f9 |
4174 | case OP_CDQ: |
4175 | assert_operand_cnt(2); |
4176 | fprintf(fout, " %s = (s32)%s >> 31;", |
4177 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
4178 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
5101a5f9 |
4179 | strcpy(g_comment, "cdq"); |
4180 | break; |
4181 | |
092f64e1 |
4182 | case OP_LODS: |
4183 | assert_operand_cnt(3); |
4184 | if (po->flags & OPF_REP) { |
4185 | // hmh.. |
4186 | ferr(po, "TODO\n"); |
4187 | } |
4188 | else { |
05381e4a |
4189 | fprintf(fout, " eax = %sesi; esi %c= %d;", |
092f64e1 |
4190 | lmod_cast_u_ptr(po, po->operand[0].lmod), |
4191 | (po->flags & OPF_DF) ? '-' : '+', |
4192 | lmod_bytes(po, po->operand[0].lmod)); |
4193 | strcpy(g_comment, "lods"); |
4194 | } |
4195 | break; |
4196 | |
33c35af6 |
4197 | case OP_STOS: |
33c35af6 |
4198 | assert_operand_cnt(3); |
4199 | if (po->flags & OPF_REP) { |
591721d7 |
4200 | fprintf(fout, " for (; ecx != 0; ecx--, edi %c= %d)\n", |
4201 | (po->flags & OPF_DF) ? '-' : '+', |
33c35af6 |
4202 | lmod_bytes(po, po->operand[0].lmod)); |
d4e3b5db |
4203 | fprintf(fout, " %sedi = eax;", |
4204 | lmod_cast_u_ptr(po, po->operand[0].lmod)); |
33c35af6 |
4205 | strcpy(g_comment, "rep stos"); |
4206 | } |
4207 | else { |
092f64e1 |
4208 | fprintf(fout, " %sedi = eax; edi %c= %d;", |
d4e3b5db |
4209 | lmod_cast_u_ptr(po, po->operand[0].lmod), |
591721d7 |
4210 | (po->flags & OPF_DF) ? '-' : '+', |
33c35af6 |
4211 | lmod_bytes(po, po->operand[0].lmod)); |
4212 | strcpy(g_comment, "stos"); |
4213 | } |
4214 | break; |
4215 | |
d4e3b5db |
4216 | case OP_MOVS: |
d4e3b5db |
4217 | assert_operand_cnt(3); |
4218 | j = lmod_bytes(po, po->operand[0].lmod); |
4219 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
591721d7 |
4220 | l = (po->flags & OPF_DF) ? '-' : '+'; |
d4e3b5db |
4221 | if (po->flags & OPF_REP) { |
4222 | fprintf(fout, |
591721d7 |
4223 | " for (; ecx != 0; ecx--, edi %c= %d, esi %c= %d)\n", |
4224 | l, j, l, j); |
d4e3b5db |
4225 | fprintf(fout, |
4226 | " %sedi = %sesi;", buf1, buf1); |
4227 | strcpy(g_comment, "rep movs"); |
4228 | } |
4229 | else { |
092f64e1 |
4230 | fprintf(fout, " %sedi = %sesi; edi %c= %d; esi %c= %d;", |
591721d7 |
4231 | buf1, buf1, l, j, l, j); |
d4e3b5db |
4232 | strcpy(g_comment, "movs"); |
4233 | } |
4234 | break; |
4235 | |
7ba45c34 |
4236 | case OP_CMPS: |
7ba45c34 |
4237 | // repe ~ repeat while ZF=1 |
4238 | assert_operand_cnt(3); |
4239 | j = lmod_bytes(po, po->operand[0].lmod); |
4240 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
591721d7 |
4241 | l = (po->flags & OPF_DF) ? '-' : '+'; |
7ba45c34 |
4242 | if (po->flags & OPF_REP) { |
4243 | fprintf(fout, |
1f84f6b3 |
4244 | " for (; ecx != 0; ecx--) {\n"); |
4741fdfe |
4245 | if (pfomask & (1 << PFO_C)) { |
4246 | // ugh.. |
4247 | fprintf(fout, |
05381e4a |
4248 | " cond_c = %sesi < %sedi;\n", buf1, buf1); |
4741fdfe |
4249 | pfomask &= ~(1 << PFO_C); |
4250 | } |
7ba45c34 |
4251 | fprintf(fout, |
05381e4a |
4252 | " cond_z = (%sesi == %sedi); esi %c= %d, edi %c= %d;\n", |
1f84f6b3 |
4253 | buf1, buf1, l, j, l, j); |
4254 | fprintf(fout, |
4255 | " if (cond_z %s 0) break;\n", |
4256 | (po->flags & OPF_REPZ) ? "==" : "!="); |
7ba45c34 |
4257 | fprintf(fout, |
4741fdfe |
4258 | " }"); |
7ba45c34 |
4259 | snprintf(g_comment, sizeof(g_comment), "rep%s cmps", |
4260 | (po->flags & OPF_REPZ) ? "e" : "ne"); |
4261 | } |
4262 | else { |
4263 | fprintf(fout, |
05381e4a |
4264 | " cond_z = (%sesi == %sedi); esi %c= %d; edi %c= %d;", |
591721d7 |
4265 | buf1, buf1, l, j, l, j); |
7ba45c34 |
4266 | strcpy(g_comment, "cmps"); |
4267 | } |
4268 | pfomask &= ~(1 << PFO_Z); |
4269 | last_arith_dst = NULL; |
4270 | delayed_flag_op = NULL; |
4271 | break; |
4272 | |
591721d7 |
4273 | case OP_SCAS: |
4274 | // only does ZF (for now) |
4275 | // repe ~ repeat while ZF=1 |
4276 | assert_operand_cnt(3); |
4277 | j = lmod_bytes(po, po->operand[0].lmod); |
4278 | l = (po->flags & OPF_DF) ? '-' : '+'; |
4279 | if (po->flags & OPF_REP) { |
4280 | fprintf(fout, |
1f84f6b3 |
4281 | " for (; ecx != 0; ecx--) {\n"); |
591721d7 |
4282 | fprintf(fout, |
1f84f6b3 |
4283 | " cond_z = (%seax == %sedi); edi %c= %d;\n", |
591721d7 |
4284 | lmod_cast_u(po, po->operand[0].lmod), |
1f84f6b3 |
4285 | lmod_cast_u_ptr(po, po->operand[0].lmod), l, j); |
4286 | fprintf(fout, |
4287 | " if (cond_z %s 0) break;\n", |
591721d7 |
4288 | (po->flags & OPF_REPZ) ? "==" : "!="); |
4289 | fprintf(fout, |
1f84f6b3 |
4290 | " }"); |
591721d7 |
4291 | snprintf(g_comment, sizeof(g_comment), "rep%s scas", |
4292 | (po->flags & OPF_REPZ) ? "e" : "ne"); |
4293 | } |
4294 | else { |
05381e4a |
4295 | fprintf(fout, " cond_z = (%seax == %sedi); edi %c= %d;", |
591721d7 |
4296 | lmod_cast_u(po, po->operand[0].lmod), |
4297 | lmod_cast_u_ptr(po, po->operand[0].lmod), l, j); |
4298 | strcpy(g_comment, "scas"); |
4299 | } |
4300 | pfomask &= ~(1 << PFO_Z); |
4301 | last_arith_dst = NULL; |
4302 | delayed_flag_op = NULL; |
4303 | break; |
4304 | |
850c9265 |
4305 | // arithmetic w/flags |
850c9265 |
4306 | case OP_AND: |
4307 | case OP_OR: |
5101a5f9 |
4308 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
4309 | // fallthrough |
850c9265 |
4310 | dualop_arith: |
4311 | assert_operand_cnt(2); |
850c9265 |
4312 | fprintf(fout, " %s %s= %s;", |
4313 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
4314 | op_to_c(po), |
3ebea2cf |
4315 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
04f8a628 |
4316 | output_std_flags(fout, po, &pfomask, buf1); |
4317 | last_arith_dst = &po->operand[0]; |
4318 | delayed_flag_op = NULL; |
4319 | break; |
4320 | |
4321 | case OP_SHL: |
4322 | case OP_SHR: |
4323 | assert_operand_cnt(2); |
4324 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
4325 | if (pfomask & (1 << PFO_C)) { |
4326 | if (po->operand[1].type == OPT_CONST) { |
4327 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
4328 | j = po->operand[1].val; |
4329 | j %= l; |
4330 | if (j != 0) { |
4331 | if (po->op == OP_SHL) |
4332 | j = l - j; |
4333 | else |
4334 | j -= 1; |
cb090db0 |
4335 | fprintf(fout, " cond_c = (%s >> %d) & 1;\n", |
4336 | buf1, j); |
04f8a628 |
4337 | } |
4338 | else |
4339 | ferr(po, "zero shift?\n"); |
4340 | } |
4341 | else |
4342 | ferr(po, "TODO\n"); |
4343 | pfomask &= ~(1 << PFO_C); |
840257f6 |
4344 | } |
04f8a628 |
4345 | fprintf(fout, " %s %s= %s;", buf1, op_to_c(po), |
4346 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
4347 | output_std_flags(fout, po, &pfomask, buf1); |
850c9265 |
4348 | last_arith_dst = &po->operand[0]; |
69a3cdfc |
4349 | delayed_flag_op = NULL; |
850c9265 |
4350 | break; |
4351 | |
d4e3b5db |
4352 | case OP_SAR: |
4353 | assert_operand_cnt(2); |
4354 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
4355 | fprintf(fout, " %s = %s%s >> %s;", buf1, |
4356 | lmod_cast_s(po, po->operand[0].lmod), buf1, |
3ebea2cf |
4357 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
04f8a628 |
4358 | output_std_flags(fout, po, &pfomask, buf1); |
d4e3b5db |
4359 | last_arith_dst = &po->operand[0]; |
4360 | delayed_flag_op = NULL; |
4361 | break; |
4362 | |
3b2f4044 |
4363 | case OP_SHRD: |
4364 | assert_operand_cnt(3); |
4365 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
4366 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
4367 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
4368 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
4369 | out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[2]); |
4370 | fprintf(fout, " %s >>= %s; %s |= %s << (%d - %s);", |
4371 | buf1, buf3, buf1, buf2, l, buf3); |
4372 | strcpy(g_comment, "shrd"); |
4373 | output_std_flags(fout, po, &pfomask, buf1); |
4374 | last_arith_dst = &po->operand[0]; |
4375 | delayed_flag_op = NULL; |
4376 | break; |
4377 | |
d4e3b5db |
4378 | case OP_ROL: |
4379 | case OP_ROR: |
4380 | assert_operand_cnt(2); |
4381 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
4382 | if (po->operand[1].type == OPT_CONST) { |
4383 | j = po->operand[1].val; |
4384 | j %= lmod_bytes(po, po->operand[0].lmod) * 8; |
4385 | fprintf(fout, po->op == OP_ROL ? |
4386 | " %s = (%s << %d) | (%s >> %d);" : |
4387 | " %s = (%s >> %d) | (%s << %d);", |
4388 | buf1, buf1, j, buf1, |
4389 | lmod_bytes(po, po->operand[0].lmod) * 8 - j); |
4390 | } |
4391 | else |
4392 | ferr(po, "TODO\n"); |
04f8a628 |
4393 | output_std_flags(fout, po, &pfomask, buf1); |
d4e3b5db |
4394 | last_arith_dst = &po->operand[0]; |
4395 | delayed_flag_op = NULL; |
4396 | break; |
4397 | |
cb090db0 |
4398 | case OP_RCL: |
4399 | case OP_RCR: |
4400 | assert_operand_cnt(2); |
4401 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
4402 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
4403 | if (po->operand[1].type == OPT_CONST) { |
4404 | j = po->operand[1].val % l; |
4405 | if (j == 0) |
4406 | ferr(po, "zero rotate\n"); |
4407 | fprintf(fout, " tmp = (%s >> %d) & 1;\n", |
4408 | buf1, (po->op == OP_RCL) ? (l - j) : (j - 1)); |
4409 | if (po->op == OP_RCL) { |
4410 | fprintf(fout, |
4411 | " %s = (%s << %d) | (cond_c << %d)", |
4412 | buf1, buf1, j, j - 1); |
4413 | if (j != 1) |
4414 | fprintf(fout, " | (%s >> %d)", buf1, l + 1 - j); |
4415 | } |
4416 | else { |
4417 | fprintf(fout, |
4418 | " %s = (%s >> %d) | (cond_c << %d)", |
4419 | buf1, buf1, j, l - j); |
4420 | if (j != 1) |
4421 | fprintf(fout, " | (%s << %d)", buf1, l + 1 - j); |
4422 | } |
4423 | fprintf(fout, ";\n"); |
4424 | fprintf(fout, " cond_c = tmp;"); |
4425 | } |
4426 | else |
4427 | ferr(po, "TODO\n"); |
4428 | strcpy(g_comment, (po->op == OP_RCL) ? "rcl" : "rcr"); |
4429 | output_std_flags(fout, po, &pfomask, buf1); |
4430 | last_arith_dst = &po->operand[0]; |
4431 | delayed_flag_op = NULL; |
4432 | break; |
4433 | |
5101a5f9 |
4434 | case OP_XOR: |
850c9265 |
4435 | assert_operand_cnt(2); |
4436 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
5101a5f9 |
4437 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
4438 | // special case for XOR |
2fe80fdb |
4439 | if (pfomask & (1 << PFO_BE)) { // weird, but it happens.. |
4440 | fprintf(fout, " cond_be = 1;\n"); |
4441 | pfomask &= ~(1 << PFO_BE); |
4442 | } |
5101a5f9 |
4443 | fprintf(fout, " %s = 0;", |
4444 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
4445 | last_arith_dst = &po->operand[0]; |
4446 | delayed_flag_op = NULL; |
850c9265 |
4447 | break; |
850c9265 |
4448 | } |
5101a5f9 |
4449 | goto dualop_arith; |
4450 | |
2fe80fdb |
4451 | case OP_ADD: |
4452 | assert_operand_cnt(2); |
4453 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
4454 | if (pfomask & (1 << PFO_C)) { |
c8dbc5be |
4455 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
4456 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
4457 | if (po->operand[0].lmod == OPLM_DWORD) { |
4458 | fprintf(fout, " tmp64 = (u64)%s + %s;\n", buf1, buf2); |
4459 | fprintf(fout, " cond_c = tmp64 >> 32;\n"); |
4460 | fprintf(fout, " %s = (u32)tmp64;", |
4461 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
4462 | strcat(g_comment, "add64"); |
4463 | } |
4464 | else { |
4465 | fprintf(fout, " cond_c = ((u32)%s + %s) >> %d;\n", |
4466 | buf1, buf2, lmod_bytes(po, po->operand[0].lmod) * 8); |
4467 | fprintf(fout, " %s += %s;", |
4468 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
4469 | buf2); |
4470 | } |
2fe80fdb |
4471 | pfomask &= ~(1 << PFO_C); |
4472 | output_std_flags(fout, po, &pfomask, buf1); |
4473 | last_arith_dst = &po->operand[0]; |
4474 | delayed_flag_op = NULL; |
4475 | break; |
4476 | } |
4477 | goto dualop_arith; |
4478 | |
4479 | case OP_SUB: |
4480 | assert_operand_cnt(2); |
4481 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
3b2f4044 |
4482 | if (pfomask & ~((1 << PFO_Z) | (1 << PFO_S))) { |
4483 | for (j = 0; j <= PFO_LE; j++) { |
4484 | if (!(pfomask & (1 << j))) |
4485 | continue; |
4486 | if (j == PFO_Z || j == PFO_S) |
4487 | continue; |
4488 | |
4489 | out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0); |
4490 | fprintf(fout, " cond_%s = %s;\n", |
4491 | parsed_flag_op_names[j], buf1); |
4492 | pfomask &= ~(1 << j); |
4493 | } |
2fe80fdb |
4494 | } |
4495 | goto dualop_arith; |
4496 | |
5101a5f9 |
4497 | case OP_ADC: |
850c9265 |
4498 | case OP_SBB: |
5101a5f9 |
4499 | assert_operand_cnt(2); |
4500 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
a2c1d768 |
4501 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
840257f6 |
4502 | if (po->op == OP_SBB |
4503 | && IS(po->operand[0].name, po->operand[1].name)) |
4504 | { |
4505 | // avoid use of unitialized var |
a2c1d768 |
4506 | fprintf(fout, " %s = -cond_c;", buf1); |
94d447fb |
4507 | // carry remains what it was |
4508 | pfomask &= ~(1 << PFO_C); |
840257f6 |
4509 | } |
4510 | else { |
a2c1d768 |
4511 | fprintf(fout, " %s %s= %s + cond_c;", buf1, op_to_c(po), |
3ebea2cf |
4512 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
840257f6 |
4513 | } |
a2c1d768 |
4514 | output_std_flags(fout, po, &pfomask, buf1); |
5101a5f9 |
4515 | last_arith_dst = &po->operand[0]; |
4516 | delayed_flag_op = NULL; |
850c9265 |
4517 | break; |
4518 | |
1f84f6b3 |
4519 | case OP_BSF: |
4520 | assert_operand_cnt(2); |
4521 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
4522 | fprintf(fout, " %s = %s ? __builtin_ffs(%s) - 1 : 0;", |
4523 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
4524 | buf2, buf2); |
4525 | output_std_flags(fout, po, &pfomask, buf1); |
4526 | last_arith_dst = &po->operand[0]; |
4527 | delayed_flag_op = NULL; |
4528 | strcat(g_comment, "bsf"); |
4529 | break; |
4530 | |
850c9265 |
4531 | case OP_DEC: |
90307a99 |
4532 | if (pfomask & ~(PFOB_S | PFOB_S | PFOB_C)) { |
4533 | for (j = 0; j <= PFO_LE; j++) { |
4534 | if (!(pfomask & (1 << j))) |
4535 | continue; |
4536 | if (j == PFO_Z || j == PFO_S || j == PFO_C) |
4537 | continue; |
4538 | |
4539 | out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0); |
4540 | fprintf(fout, " cond_%s = %s;\n", |
4541 | parsed_flag_op_names[j], buf1); |
4542 | pfomask &= ~(1 << j); |
4543 | } |
4544 | } |
4545 | // fallthrough |
4546 | |
4547 | case OP_INC: |
4548 | if (pfomask & (1 << PFO_C)) |
4549 | // carry is unaffected by inc/dec.. wtf? |
4550 | ferr(po, "carry propagation needed\n"); |
4551 | |
850c9265 |
4552 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
1bafb621 |
4553 | if (po->operand[0].type == OPT_REG) { |
4554 | strcpy(buf2, po->op == OP_INC ? "++" : "--"); |
4555 | fprintf(fout, " %s%s;", buf1, buf2); |
4556 | } |
4557 | else { |
4558 | strcpy(buf2, po->op == OP_INC ? "+" : "-"); |
4559 | fprintf(fout, " %s %s= 1;", buf1, buf2); |
4560 | } |
a2c1d768 |
4561 | output_std_flags(fout, po, &pfomask, buf1); |
5101a5f9 |
4562 | last_arith_dst = &po->operand[0]; |
4563 | delayed_flag_op = NULL; |
4564 | break; |
4565 | |
4566 | case OP_NEG: |
4567 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
3ebea2cf |
4568 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]); |
5101a5f9 |
4569 | fprintf(fout, " %s = -%s%s;", buf1, |
4570 | lmod_cast_s(po, po->operand[0].lmod), buf2); |
850c9265 |
4571 | last_arith_dst = &po->operand[0]; |
69a3cdfc |
4572 | delayed_flag_op = NULL; |
940e8e66 |
4573 | if (pfomask & (1 << PFO_C)) { |
4574 | fprintf(fout, "\n cond_c = (%s != 0);", buf1); |
4575 | pfomask &= ~(1 << PFO_C); |
4576 | } |
850c9265 |
4577 | break; |
4578 | |
4579 | case OP_IMUL: |
de50b98b |
4580 | if (po->operand_cnt == 2) { |
4581 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
850c9265 |
4582 | goto dualop_arith; |
de50b98b |
4583 | } |
87bf6cec |
4584 | if (po->operand_cnt == 3) |
4585 | ferr(po, "TODO imul3\n"); |
4586 | // fallthrough |
4587 | case OP_MUL: |
4588 | assert_operand_cnt(1); |
c8dbc5be |
4589 | switch (po->operand[0].lmod) { |
4590 | case OPLM_DWORD: |
4591 | strcpy(buf1, po->op == OP_IMUL ? "(s64)(s32)" : "(u64)"); |
4592 | fprintf(fout, " tmp64 = %seax * %s%s;\n", buf1, buf1, |
4593 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0])); |
4594 | fprintf(fout, " edx = tmp64 >> 32;\n"); |
4595 | fprintf(fout, " eax = tmp64;"); |
4596 | break; |
4597 | case OPLM_BYTE: |
4598 | strcpy(buf1, po->op == OP_IMUL ? "(s16)(s8)" : "(u16)(u8)"); |
4599 | fprintf(fout, " LOWORD(eax) = %seax * %s;", buf1, |
4600 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[0], |
4601 | buf1, 0)); |
4602 | break; |
4603 | default: |
4604 | ferr(po, "TODO: unhandled mul type\n"); |
4605 | break; |
4606 | } |
87bf6cec |
4607 | last_arith_dst = NULL; |
69a3cdfc |
4608 | delayed_flag_op = NULL; |
91977a1c |
4609 | break; |
4610 | |
5101a5f9 |
4611 | case OP_DIV: |
4612 | case OP_IDIV: |
4613 | assert_operand_cnt(1); |
4614 | if (po->operand[0].lmod != OPLM_DWORD) |
4615 | ferr(po, "unhandled lmod %d\n", po->operand[0].lmod); |
4616 | |
cb090db0 |
4617 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
4618 | strcpy(buf2, lmod_cast(po, po->operand[0].lmod, |
4619 | po->op == OP_IDIV)); |
4620 | switch (po->operand[0].lmod) { |
4621 | case OPLM_DWORD: |
4622 | if (po->flags & OPF_32BIT) |
4623 | snprintf(buf3, sizeof(buf3), "%seax", buf2); |
4624 | else { |
4625 | fprintf(fout, " tmp64 = ((u64)edx << 32) | eax;\n"); |
4626 | snprintf(buf3, sizeof(buf3), "%stmp64", |
4627 | (po->op == OP_IDIV) ? "(s64)" : ""); |
4628 | } |
4629 | if (po->operand[0].type == OPT_REG |
4630 | && po->operand[0].reg == xDX) |
4631 | { |
4632 | fprintf(fout, " eax = %s / %s%s;", buf3, buf2, buf1); |
4633 | fprintf(fout, " edx = %s %% %s%s;\n", buf3, buf2, buf1); |
4634 | } |
4635 | else { |
4636 | fprintf(fout, " edx = %s %% %s%s;\n", buf3, buf2, buf1); |
4637 | fprintf(fout, " eax = %s / %s%s;", buf3, buf2, buf1); |
4638 | } |
4639 | break; |
4640 | default: |
4641 | ferr(po, "unhandled division type\n"); |
5101a5f9 |
4642 | } |
87bf6cec |
4643 | last_arith_dst = NULL; |
4644 | delayed_flag_op = NULL; |
5101a5f9 |
4645 | break; |
4646 | |
91977a1c |
4647 | case OP_TEST: |
4648 | case OP_CMP: |
850c9265 |
4649 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
940e8e66 |
4650 | if (pfomask != 0) { |
69a3cdfc |
4651 | for (j = 0; j < 8; j++) { |
940e8e66 |
4652 | if (pfomask & (1 << j)) { |
69a3cdfc |
4653 | out_cmp_test(buf1, sizeof(buf1), po, j, 0); |
4654 | fprintf(fout, " cond_%s = %s;", |
4655 | parsed_flag_op_names[j], buf1); |
4656 | } |
4657 | } |
940e8e66 |
4658 | pfomask = 0; |
69a3cdfc |
4659 | } |
4660 | else |
4661 | no_output = 1; |
7ba45c34 |
4662 | last_arith_dst = NULL; |
69a3cdfc |
4663 | delayed_flag_op = po; |
91977a1c |
4664 | break; |
4665 | |
092f64e1 |
4666 | case OP_SCC: |
4667 | // SETcc - should already be handled |
4668 | break; |
4669 | |
69a3cdfc |
4670 | // note: we reuse OP_Jcc for SETcc, only flags differ |
092f64e1 |
4671 | case OP_JCC: |
4672 | fprintf(fout, "\n goto %s;", po->operand[0].name); |
850c9265 |
4673 | break; |
4674 | |
5c024ef7 |
4675 | case OP_JECXZ: |
4676 | fprintf(fout, " if (ecx == 0)\n"); |
4677 | fprintf(fout, " goto %s;", po->operand[0].name); |
4678 | strcat(g_comment, "jecxz"); |
4679 | break; |
4680 | |
850c9265 |
4681 | case OP_JMP: |
87bf6cec |
4682 | assert_operand_cnt(1); |
de50b98b |
4683 | last_arith_dst = NULL; |
4684 | delayed_flag_op = NULL; |
4685 | |
4c45fa73 |
4686 | if (po->operand[0].type == OPT_REGMEM) { |
4687 | ret = sscanf(po->operand[0].name, "%[^[][%[^*]*4]", |
4688 | buf1, buf2); |
4689 | if (ret != 2) |
4690 | ferr(po, "parse failure for jmp '%s'\n", |
4691 | po->operand[0].name); |
4692 | fprintf(fout, " goto *jt_%s[%s];", buf1, buf2); |
4693 | break; |
4694 | } |
4695 | else if (po->operand[0].type != OPT_LABEL) |
4696 | ferr(po, "unhandled jmp type\n"); |
87bf6cec |
4697 | |
850c9265 |
4698 | fprintf(fout, " goto %s;", po->operand[0].name); |
91977a1c |
4699 | break; |
4700 | |
4701 | case OP_CALL: |
5101a5f9 |
4702 | assert_operand_cnt(1); |
092f64e1 |
4703 | pp = po->pp; |
89ff3147 |
4704 | my_assert_not(pp, NULL); |
91977a1c |
4705 | |
092f64e1 |
4706 | strcpy(buf3, " "); |
4707 | if (po->flags & OPF_CC) { |
4708 | // we treat conditional branch to another func |
4709 | // (yes such code exists..) as conditional tailcall |
4710 | strcat(buf3, " "); |
4711 | fprintf(fout, " {\n"); |
4712 | } |
4713 | |
8eb12e72 |
4714 | if (pp->is_fptr && !pp->is_arg) { |
092f64e1 |
4715 | fprintf(fout, "%s%s = %s;\n", buf3, pp->name, |
1cd4a663 |
4716 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], |
4717 | "(void *)", 0)); |
8eb12e72 |
4718 | if (pp->is_unresolved) |
4719 | fprintf(fout, "%sunresolved_call(\"%s:%d\", %s);\n", |
4720 | buf3, asmfn, po->asmln, pp->name); |
4721 | } |
1bafb621 |
4722 | |
092f64e1 |
4723 | fprintf(fout, "%s", buf3); |
2b43685d |
4724 | if (strstr(pp->ret_type.name, "int64")) { |
87bf6cec |
4725 | if (po->flags & OPF_TAIL) |
2b43685d |
4726 | ferr(po, "int64 and tail?\n"); |
2fe80fdb |
4727 | fprintf(fout, "tmp64 = "); |
2b43685d |
4728 | } |
4729 | else if (!IS(pp->ret_type.name, "void")) { |
4730 | if (po->flags & OPF_TAIL) { |
840257f6 |
4731 | if (!IS(g_func_pp->ret_type.name, "void")) { |
4732 | fprintf(fout, "return "); |
4733 | if (g_func_pp->ret_type.is_ptr != pp->ret_type.is_ptr) |
4734 | fprintf(fout, "(%s)", g_func_pp->ret_type.name); |
4735 | } |
2b43685d |
4736 | } |
75ad0378 |
4737 | else if (regmask & (1 << xAX)) { |
87bf6cec |
4738 | fprintf(fout, "eax = "); |
2b43685d |
4739 | if (pp->ret_type.is_ptr) |
4740 | fprintf(fout, "(u32)"); |
4741 | } |
91977a1c |
4742 | } |
87bf6cec |
4743 | |
ddaf8bd7 |
4744 | if (pp->name[0] == 0) |
4745 | ferr(po, "missing pp->name\n"); |
4746 | fprintf(fout, "%s%s(", pp->name, |
4747 | pp->has_structarg ? "_sa" : ""); |
39b168b8 |
4748 | |
2fe80fdb |
4749 | if (po->flags & OPF_ATAIL) { |
4750 | if (pp->argc_stack != g_func_pp->argc_stack |
4751 | || (pp->argc_stack > 0 |
4752 | && pp->is_stdcall != g_func_pp->is_stdcall)) |
4753 | ferr(po, "incompatible tailcall\n"); |
1f84f6b3 |
4754 | if (g_func_pp->has_retreg) |
4755 | ferr(po, "TODO: retreg+tailcall\n"); |
87bf6cec |
4756 | |
2fe80fdb |
4757 | for (arg = j = 0; arg < pp->argc; arg++) { |
4758 | if (arg > 0) |
4759 | fprintf(fout, ", "); |
87bf6cec |
4760 | |
2fe80fdb |
4761 | cast[0] = 0; |
4762 | if (pp->arg[arg].type.is_ptr) |
4763 | snprintf(cast, sizeof(cast), "(%s)", |
4764 | pp->arg[arg].type.name); |
91977a1c |
4765 | |
2fe80fdb |
4766 | if (pp->arg[arg].reg != NULL) { |
4767 | fprintf(fout, "%s%s", cast, pp->arg[arg].reg); |
4768 | continue; |
4769 | } |
4770 | // stack arg |
4771 | for (; j < g_func_pp->argc; j++) |
4772 | if (g_func_pp->arg[j].reg == NULL) |
4773 | break; |
4774 | fprintf(fout, "%sa%d", cast, j + 1); |
4775 | j++; |
69a3cdfc |
4776 | } |
2fe80fdb |
4777 | } |
4778 | else { |
4779 | for (arg = 0; arg < pp->argc; arg++) { |
4780 | if (arg > 0) |
4781 | fprintf(fout, ", "); |
4782 | |
4783 | cast[0] = 0; |
4784 | if (pp->arg[arg].type.is_ptr) |
4785 | snprintf(cast, sizeof(cast), "(%s)", |
4786 | pp->arg[arg].type.name); |
4787 | |
4788 | if (pp->arg[arg].reg != NULL) { |
1f84f6b3 |
4789 | if (pp->arg[arg].type.is_retreg) |
4790 | fprintf(fout, "&%s", pp->arg[arg].reg); |
4791 | else |
4792 | fprintf(fout, "%s%s", cast, pp->arg[arg].reg); |
2fe80fdb |
4793 | continue; |
4794 | } |
4795 | |
4796 | // stack arg |
4797 | tmp_op = pp->arg[arg].datap; |
4798 | if (tmp_op == NULL) |
4799 | ferr(po, "parsed_op missing for arg%d\n", arg); |
23fd0b11 |
4800 | |
4801 | if (tmp_op->flags & OPF_VAPUSH) { |
4802 | fprintf(fout, "ap"); |
4803 | } |
5f70a34f |
4804 | else if (tmp_op->p_argpass != 0) { |
4805 | fprintf(fout, "a%d", tmp_op->p_argpass); |
4806 | } |
4807 | else if (tmp_op->p_argnum != 0) { |
4808 | fprintf(fout, "%ss_a%d", cast, tmp_op->p_argnum); |
2fe80fdb |
4809 | } |
4810 | else { |
4811 | fprintf(fout, "%s", |
4812 | out_src_opr(buf1, sizeof(buf1), |
4813 | tmp_op, &tmp_op->operand[0], cast, 0)); |
4814 | } |
69a3cdfc |
4815 | } |
91977a1c |
4816 | } |
4817 | fprintf(fout, ");"); |
87bf6cec |
4818 | |
2b43685d |
4819 | if (strstr(pp->ret_type.name, "int64")) { |
4820 | fprintf(fout, "\n"); |
092f64e1 |
4821 | fprintf(fout, "%sedx = tmp64 >> 32;\n", buf3); |
4822 | fprintf(fout, "%seax = tmp64;", buf3); |
2b43685d |
4823 | } |
4824 | |
89ff3147 |
4825 | if (pp->is_unresolved) { |
8eb12e72 |
4826 | snprintf(buf2, sizeof(buf2), " unresolved %dreg", |
89ff3147 |
4827 | pp->argc_reg); |
092f64e1 |
4828 | strcat(g_comment, buf2); |
89ff3147 |
4829 | } |
4830 | |
87bf6cec |
4831 | if (po->flags & OPF_TAIL) { |
840257f6 |
4832 | ret = 0; |
ddaf8bd7 |
4833 | if (i == opcnt - 1 || pp->is_noreturn) |
840257f6 |
4834 | ret = 0; |
4835 | else if (IS(pp->ret_type.name, "void")) |
4836 | ret = 1; |
4837 | else if (IS(g_func_pp->ret_type.name, "void")) |
4838 | ret = 1; |
4839 | // else already handled as 'return f()' |
4840 | |
4841 | if (ret) { |
da87ae38 |
4842 | if (!IS(g_func_pp->ret_type.name, "void")) { |
ddaf8bd7 |
4843 | ferr(po, "int func -> void func tailcall?\n"); |
da87ae38 |
4844 | } |
4845 | else { |
092f64e1 |
4846 | fprintf(fout, "\n%sreturn;", buf3); |
ddaf8bd7 |
4847 | strcat(g_comment, " ^ tailcall"); |
da87ae38 |
4848 | } |
3ebea2cf |
4849 | } |
89ff3147 |
4850 | else |
ddaf8bd7 |
4851 | strcat(g_comment, " tailcall"); |
87bf6cec |
4852 | } |
ddaf8bd7 |
4853 | if (pp->is_noreturn) |
4854 | strcat(g_comment, " noreturn"); |
2fe80fdb |
4855 | if ((po->flags & OPF_ATAIL) && pp->argc_stack > 0) |
4856 | strcat(g_comment, " argframe"); |
092f64e1 |
4857 | if (po->flags & OPF_CC) |
4858 | strcat(g_comment, " cond"); |
4859 | |
4860 | if (po->flags & OPF_CC) |
4861 | fprintf(fout, "\n }"); |
4862 | |
87bf6cec |
4863 | delayed_flag_op = NULL; |
4864 | last_arith_dst = NULL; |
91977a1c |
4865 | break; |
4866 | |
4867 | case OP_RET: |
bd96f656 |
4868 | if (g_func_pp->is_vararg) |
4f12f671 |
4869 | fprintf(fout, " va_end(ap);\n"); |
1f84f6b3 |
4870 | if (g_func_pp->has_retreg) { |
4871 | for (arg = 0; arg < g_func_pp->argc; arg++) |
4872 | if (g_func_pp->arg[arg].type.is_retreg) |
4873 | fprintf(fout, " *r_%s = %s;\n", |
4874 | g_func_pp->arg[arg].reg, g_func_pp->arg[arg].reg); |
4875 | } |
4f12f671 |
4876 | |
bd96f656 |
4877 | if (IS(g_func_pp->ret_type.name, "void")) { |
3ebea2cf |
4878 | if (i != opcnt - 1 || label_pending) |
4879 | fprintf(fout, " return;"); |
4880 | } |
bd96f656 |
4881 | else if (g_func_pp->ret_type.is_ptr) { |
d4e3b5db |
4882 | fprintf(fout, " return (%s)eax;", |
bd96f656 |
4883 | g_func_pp->ret_type.name); |
3ebea2cf |
4884 | } |
2fe80fdb |
4885 | else if (IS(g_func_pp->ret_type.name, "__int64")) |
4886 | fprintf(fout, " return ((u64)edx << 32) | eax;"); |
91977a1c |
4887 | else |
4888 | fprintf(fout, " return eax;"); |
de50b98b |
4889 | |
4890 | last_arith_dst = NULL; |
4891 | delayed_flag_op = NULL; |
91977a1c |
4892 | break; |
4893 | |
4894 | case OP_PUSH: |
1f84f6b3 |
4895 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
5f70a34f |
4896 | if (po->p_argnum != 0) { |
69a3cdfc |
4897 | // special case - saved func arg |
5f70a34f |
4898 | fprintf(fout, " s_a%d = %s;", po->p_argnum, buf1); |
69a3cdfc |
4899 | break; |
4900 | } |
d4e3b5db |
4901 | else if (po->flags & OPF_RSAVE) { |
d4e3b5db |
4902 | fprintf(fout, " s_%s = %s;", buf1, buf1); |
4903 | break; |
4904 | } |
1f84f6b3 |
4905 | else if (g_func_pp->is_userstack) { |
4906 | fprintf(fout, " *(--esp) = %s;", buf1); |
4907 | break; |
4908 | } |
e56ab892 |
4909 | if (!(g_ida_func_attr & IDAFA_NORETURN)) |
4910 | ferr(po, "stray push encountered\n"); |
4911 | no_output = 1; |
91977a1c |
4912 | break; |
4913 | |
4914 | case OP_POP: |
d4e3b5db |
4915 | if (po->flags & OPF_RSAVE) { |
3ebea2cf |
4916 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
d4e3b5db |
4917 | fprintf(fout, " %s = s_%s;", buf1, buf1); |
4918 | break; |
4919 | } |
5c024ef7 |
4920 | else if (po->datap != NULL) { |
4921 | // push/pop pair |
4922 | tmp_op = po->datap; |
4923 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
4924 | fprintf(fout, " %s = %s;", buf1, |
4925 | out_src_opr(buf2, sizeof(buf2), |
4926 | tmp_op, &tmp_op->operand[0], |
c7ed83dd |
4927 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0)); |
5c024ef7 |
4928 | break; |
4929 | } |
1f84f6b3 |
4930 | else if (g_func_pp->is_userstack) { |
4931 | fprintf(fout, " %s = *esp++;", |
4932 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
4933 | break; |
4934 | } |
4935 | else |
4936 | ferr(po, "stray pop encountered\n"); |
91977a1c |
4937 | break; |
4938 | |
33c35af6 |
4939 | case OP_NOP: |
2b43685d |
4940 | no_output = 1; |
33c35af6 |
4941 | break; |
4942 | |
90307a99 |
4943 | // mmx |
4944 | case OP_EMMS: |
4945 | strcpy(g_comment, "(emms)"); |
4946 | break; |
4947 | |
91977a1c |
4948 | default: |
4949 | no_output = 1; |
69a3cdfc |
4950 | ferr(po, "unhandled op type %d, flags %x\n", |
4951 | po->op, po->flags); |
91977a1c |
4952 | break; |
4953 | } |
4954 | |
4955 | if (g_comment[0] != 0) { |
ddaf8bd7 |
4956 | char *p = g_comment; |
4957 | while (my_isblank(*p)) |
4958 | p++; |
4959 | fprintf(fout, " // %s", p); |
91977a1c |
4960 | g_comment[0] = 0; |
4961 | no_output = 0; |
4962 | } |
4963 | if (!no_output) |
4964 | fprintf(fout, "\n"); |
5101a5f9 |
4965 | |
2b43685d |
4966 | // some sanity checking |
591721d7 |
4967 | if (po->flags & OPF_REP) { |
4968 | if (po->op != OP_STOS && po->op != OP_MOVS |
4969 | && po->op != OP_CMPS && po->op != OP_SCAS) |
4970 | ferr(po, "unexpected rep\n"); |
4971 | if (!(po->flags & (OPF_REPZ|OPF_REPNZ)) |
4972 | && (po->op == OP_CMPS || po->op == OP_SCAS)) |
4973 | ferr(po, "cmps/scas with plain rep\n"); |
4974 | } |
4975 | if ((po->flags & (OPF_REPZ|OPF_REPNZ)) |
4976 | && po->op != OP_CMPS && po->op != OP_SCAS) |
2b43685d |
4977 | ferr(po, "unexpected repz/repnz\n"); |
4978 | |
940e8e66 |
4979 | if (pfomask != 0) |
7ba45c34 |
4980 | ferr(po, "missed flag calc, pfomask=%x\n", pfomask); |
940e8e66 |
4981 | |
5101a5f9 |
4982 | // see is delayed flag stuff is still valid |
4983 | if (delayed_flag_op != NULL && delayed_flag_op != po) { |
89ff3147 |
4984 | if (is_any_opr_modified(delayed_flag_op, po, 0)) |
5101a5f9 |
4985 | delayed_flag_op = NULL; |
4986 | } |
4987 | |
4988 | if (last_arith_dst != NULL && last_arith_dst != &po->operand[0]) { |
4989 | if (is_opr_modified(last_arith_dst, po)) |
4990 | last_arith_dst = NULL; |
4991 | } |
3ebea2cf |
4992 | |
4993 | label_pending = 0; |
91977a1c |
4994 | } |
4995 | |
a2c1d768 |
4996 | if (g_stack_fsz && !g_stack_frame_used) |
4997 | fprintf(fout, " (void)sf;\n"); |
4998 | |
91977a1c |
4999 | fprintf(fout, "}\n\n"); |
5000 | |
5001 | // cleanup |
5002 | for (i = 0; i < opcnt; i++) { |
4c45fa73 |
5003 | struct label_ref *lr, *lr_del; |
5004 | |
5005 | lr = g_label_refs[i].next; |
5006 | while (lr != NULL) { |
5007 | lr_del = lr; |
5008 | lr = lr->next; |
5009 | free(lr_del); |
5010 | } |
5011 | g_label_refs[i].i = -1; |
5012 | g_label_refs[i].next = NULL; |
5013 | |
91977a1c |
5014 | if (ops[i].op == OP_CALL) { |
092f64e1 |
5015 | if (ops[i].pp) |
5016 | proto_release(ops[i].pp); |
91977a1c |
5017 | } |
5018 | } |
bd96f656 |
5019 | g_func_pp = NULL; |
91977a1c |
5020 | } |
c36e914d |
5021 | |
d4e3b5db |
5022 | static void set_label(int i, const char *name) |
5023 | { |
5024 | const char *p; |
5025 | int len; |
5026 | |
5027 | len = strlen(name); |
5028 | p = strchr(name, ':'); |
5029 | if (p != NULL) |
5030 | len = p - name; |
5031 | |
5032 | if (len > sizeof(g_labels[0]) - 1) |
5033 | aerr("label '%s' too long: %d\n", name, len); |
e56ab892 |
5034 | if (g_labels[i][0] != 0 && !IS_START(g_labels[i], "algn_")) |
5035 | aerr("dupe label '%s' vs '%s'?\n", name, g_labels[i]); |
d4e3b5db |
5036 | memcpy(g_labels[i], name, len); |
5037 | g_labels[i][len] = 0; |
5038 | } |
5039 | |
bfa4a6ee |
5040 | // '=' needs special treatment.. |
5041 | static char *next_word_s(char *w, size_t wsize, char *s) |
5042 | { |
5043 | size_t i; |
5044 | |
5045 | s = sskip(s); |
5046 | |
5047 | for (i = 0; i < wsize - 1; i++) { |
5048 | if (s[i] == 0 || my_isblank(s[i]) || (s[i] == '=' && i > 0)) |
5049 | break; |
5050 | w[i] = s[i]; |
5051 | } |
5052 | w[i] = 0; |
5053 | |
5054 | if (s[i] != 0 && !my_isblank(s[i]) && s[i] != '=') |
5055 | printf("warning: '%s' truncated\n", w); |
5056 | |
5057 | return s + i; |
5058 | } |
5059 | |
e56ab892 |
5060 | struct chunk_item { |
5061 | char *name; |
5062 | long fptr; |
de50b98b |
5063 | int asmln; |
e56ab892 |
5064 | }; |
5065 | |
cdfaeed7 |
5066 | static struct chunk_item *func_chunks; |
5067 | static int func_chunk_cnt; |
5068 | static int func_chunk_alloc; |
5069 | |
5070 | static void add_func_chunk(FILE *fasm, const char *name, int line) |
5071 | { |
5072 | if (func_chunk_cnt >= func_chunk_alloc) { |
5073 | func_chunk_alloc *= 2; |
5074 | func_chunks = realloc(func_chunks, |
5075 | func_chunk_alloc * sizeof(func_chunks[0])); |
5076 | my_assert_not(func_chunks, NULL); |
5077 | } |
5078 | func_chunks[func_chunk_cnt].fptr = ftell(fasm); |
5079 | func_chunks[func_chunk_cnt].name = strdup(name); |
5080 | func_chunks[func_chunk_cnt].asmln = line; |
5081 | func_chunk_cnt++; |
5082 | } |
5083 | |
e56ab892 |
5084 | static int cmp_chunks(const void *p1, const void *p2) |
5085 | { |
5086 | const struct chunk_item *c1 = p1, *c2 = p2; |
5087 | return strcmp(c1->name, c2->name); |
5088 | } |
5089 | |
bfa4a6ee |
5090 | static int cmpstringp(const void *p1, const void *p2) |
5091 | { |
5092 | return strcmp(*(char * const *)p1, *(char * const *)p2); |
5093 | } |
5094 | |
cdfaeed7 |
5095 | static void scan_ahead(FILE *fasm) |
5096 | { |
5097 | char words[2][256]; |
5098 | char line[256]; |
5099 | long oldpos; |
5100 | int oldasmln; |
5101 | int wordc; |
5102 | char *p; |
5103 | int i; |
5104 | |
5105 | oldpos = ftell(fasm); |
5106 | oldasmln = asmln; |
5107 | |
5108 | while (fgets(line, sizeof(line), fasm)) |
5109 | { |
5110 | wordc = 0; |
5111 | asmln++; |
5112 | |
5113 | p = sskip(line); |
5114 | if (*p == 0) |
5115 | continue; |
5116 | |
5117 | if (*p == ';') |
5118 | { |
5119 | // get rid of random tabs |
5120 | for (i = 0; line[i] != 0; i++) |
5121 | if (line[i] == '\t') |
5122 | line[i] = ' '; |
5123 | |
5124 | if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR ")) |
5125 | { |
5126 | p += 30; |
5127 | next_word(words[0], sizeof(words[0]), p); |
5128 | if (words[0][0] == 0) |
5129 | aerr("missing name for func chunk?\n"); |
5130 | |
5131 | add_func_chunk(fasm, words[0], asmln); |
5132 | } |
46b388c2 |
5133 | else if (IS_START(p, "; sctend")) |
5134 | break; |
5135 | |
cdfaeed7 |
5136 | continue; |
5137 | } // *p == ';' |
5138 | |
5139 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
5140 | words[wordc][0] = 0; |
5141 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
5142 | if (*p == 0 || *p == ';') { |
5143 | wordc++; |
5144 | break; |
5145 | } |
5146 | } |
5147 | |
5148 | if (wordc == 2 && IS(words[1], "ends")) |
5149 | break; |
5150 | } |
5151 | |
5152 | fseek(fasm, oldpos, SEEK_SET); |
5153 | asmln = oldasmln; |
5154 | } |
5155 | |
91977a1c |
5156 | int main(int argc, char *argv[]) |
5157 | { |
06c5d854 |
5158 | FILE *fout, *fasm, *frlist; |
4c45fa73 |
5159 | struct parsed_data *pd = NULL; |
5160 | int pd_alloc = 0; |
5161 | char **rlist = NULL; |
5162 | int rlist_len = 0; |
5163 | int rlist_alloc = 0; |
e56ab892 |
5164 | int func_chunks_used = 0; |
5165 | int func_chunks_sorted = 0; |
e56ab892 |
5166 | int func_chunk_i = -1; |
5167 | long func_chunk_ret = 0; |
de50b98b |
5168 | int func_chunk_ret_ln = 0; |
cdfaeed7 |
5169 | int scanned_ahead = 0; |
91977a1c |
5170 | char line[256]; |
a2c1d768 |
5171 | char words[20][256]; |
4c45fa73 |
5172 | enum opr_lenmod lmod; |
ddaf8bd7 |
5173 | char *sctproto = NULL; |
91977a1c |
5174 | int in_func = 0; |
4c45fa73 |
5175 | int pending_endp = 0; |
bfa4a6ee |
5176 | int skip_func = 0; |
940e8e66 |
5177 | int skip_warned = 0; |
91977a1c |
5178 | int eq_alloc; |
bfa4a6ee |
5179 | int verbose = 0; |
1f84f6b3 |
5180 | int multi_seg = 0; |
46b388c2 |
5181 | int end = 0; |
bfa4a6ee |
5182 | int arg_out; |
89ff3147 |
5183 | int arg; |
91977a1c |
5184 | int pi = 0; |
e56ab892 |
5185 | int i, j; |
5186 | int ret, len; |
91977a1c |
5187 | char *p; |
5188 | int wordc; |
5189 | |
89ff3147 |
5190 | for (arg = 1; arg < argc; arg++) { |
5191 | if (IS(argv[arg], "-v")) |
5192 | verbose = 1; |
5193 | else if (IS(argv[arg], "-rf")) |
5194 | g_allow_regfunc = 1; |
1f84f6b3 |
5195 | else if (IS(argv[arg], "-m")) |
5196 | multi_seg = 1; |
89ff3147 |
5197 | else |
5198 | break; |
bfa4a6ee |
5199 | } |
5200 | |
5201 | if (argc < arg + 3) { |
1f84f6b3 |
5202 | printf("usage:\n%s [-v] [-rf] [-m] <.c> <.asm> <hdrf> [rlist]*\n", |
91977a1c |
5203 | argv[0]); |
5204 | return 1; |
5205 | } |
5206 | |
bfa4a6ee |
5207 | arg_out = arg++; |
91977a1c |
5208 | |
bfa4a6ee |
5209 | asmfn = argv[arg++]; |
91977a1c |
5210 | fasm = fopen(asmfn, "r"); |
5211 | my_assert_not(fasm, NULL); |
5212 | |
bfa4a6ee |
5213 | hdrfn = argv[arg++]; |
06c5d854 |
5214 | g_fhdr = fopen(hdrfn, "r"); |
5215 | my_assert_not(g_fhdr, NULL); |
bfa4a6ee |
5216 | |
5217 | rlist_alloc = 64; |
5218 | rlist = malloc(rlist_alloc * sizeof(rlist[0])); |
5219 | my_assert_not(rlist, NULL); |
5220 | // needs special handling.. |
5221 | rlist[rlist_len++] = "__alloca_probe"; |
5222 | |
e56ab892 |
5223 | func_chunk_alloc = 32; |
5224 | func_chunks = malloc(func_chunk_alloc * sizeof(func_chunks[0])); |
5225 | my_assert_not(func_chunks, NULL); |
5226 | |
a2c1d768 |
5227 | memset(words, 0, sizeof(words)); |
5228 | |
bfa4a6ee |
5229 | for (; arg < argc; arg++) { |
5230 | frlist = fopen(argv[arg], "r"); |
5231 | my_assert_not(frlist, NULL); |
5232 | |
5233 | while (fgets(line, sizeof(line), frlist)) { |
5234 | p = sskip(line); |
1cd4a663 |
5235 | if (*p == 0 || *p == ';') |
5236 | continue; |
5237 | if (*p == '#') { |
89ff3147 |
5238 | if (IS_START(p, "#if 0") |
5239 | || (g_allow_regfunc && IS_START(p, "#if NO_REGFUNC"))) |
5240 | { |
1cd4a663 |
5241 | skip_func = 1; |
89ff3147 |
5242 | } |
1cd4a663 |
5243 | else if (IS_START(p, "#endif")) |
5244 | skip_func = 0; |
5245 | continue; |
5246 | } |
5247 | if (skip_func) |
bfa4a6ee |
5248 | continue; |
5249 | |
5250 | p = next_word(words[0], sizeof(words[0]), p); |
5251 | if (words[0][0] == 0) |
5252 | continue; |
5253 | |
5254 | if (rlist_len >= rlist_alloc) { |
5255 | rlist_alloc = rlist_alloc * 2 + 64; |
5256 | rlist = realloc(rlist, rlist_alloc * sizeof(rlist[0])); |
5257 | my_assert_not(rlist, NULL); |
5258 | } |
5259 | rlist[rlist_len++] = strdup(words[0]); |
5260 | } |
1cd4a663 |
5261 | skip_func = 0; |
bfa4a6ee |
5262 | |
5263 | fclose(frlist); |
5264 | frlist = NULL; |
5265 | } |
5266 | |
5267 | if (rlist_len > 0) |
5268 | qsort(rlist, rlist_len, sizeof(rlist[0]), cmpstringp); |
5269 | |
5270 | fout = fopen(argv[arg_out], "w"); |
91977a1c |
5271 | my_assert_not(fout, NULL); |
5272 | |
5273 | eq_alloc = 128; |
5274 | g_eqs = malloc(eq_alloc * sizeof(g_eqs[0])); |
5275 | my_assert_not(g_eqs, NULL); |
5276 | |
4c45fa73 |
5277 | for (i = 0; i < ARRAY_SIZE(g_label_refs); i++) { |
5278 | g_label_refs[i].i = -1; |
5279 | g_label_refs[i].next = NULL; |
5280 | } |
5281 | |
91977a1c |
5282 | while (fgets(line, sizeof(line), fasm)) |
5283 | { |
4c45fa73 |
5284 | wordc = 0; |
91977a1c |
5285 | asmln++; |
5286 | |
5287 | p = sskip(line); |
1bafb621 |
5288 | if (*p == 0) |
91977a1c |
5289 | continue; |
5290 | |
de50b98b |
5291 | // get rid of random tabs |
5292 | for (i = 0; line[i] != 0; i++) |
5293 | if (line[i] == '\t') |
5294 | line[i] = ' '; |
5295 | |
e56ab892 |
5296 | if (*p == ';') |
5297 | { |
e56ab892 |
5298 | if (p[2] == '=' && IS_START(p, "; =============== S U B")) |
5299 | goto do_pending_endp; // eww.. |
5300 | |
5301 | if (p[2] == 'A' && IS_START(p, "; Attributes:")) |
5302 | { |
5303 | static const char *attrs[] = { |
5304 | "bp-based frame", |
5305 | "library function", |
5306 | "static", |
5307 | "noreturn", |
5308 | "thunk", |
5309 | "fpd=", |
5310 | }; |
5311 | |
5312 | // parse IDA's attribute-list comment |
5313 | g_ida_func_attr = 0; |
5314 | p = sskip(p + 13); |
5315 | |
5316 | for (; *p != 0; p = sskip(p)) { |
5317 | for (i = 0; i < ARRAY_SIZE(attrs); i++) { |
5318 | if (!strncmp(p, attrs[i], strlen(attrs[i]))) { |
5319 | g_ida_func_attr |= 1 << i; |
5320 | p += strlen(attrs[i]); |
5321 | break; |
5322 | } |
5323 | } |
5324 | if (i == ARRAY_SIZE(attrs)) { |
5325 | anote("unparsed IDA attr: %s\n", p); |
1bafb621 |
5326 | break; |
5327 | } |
e56ab892 |
5328 | if (IS(attrs[i], "fpd=")) { |
5329 | p = next_word(words[0], sizeof(words[0]), p); |
5330 | // ignore for now.. |
5331 | } |
1bafb621 |
5332 | } |
e56ab892 |
5333 | } |
5334 | else if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR ")) |
5335 | { |
5336 | p += 30; |
5337 | next_word(words[0], sizeof(words[0]), p); |
5338 | if (words[0][0] == 0) |
cdfaeed7 |
5339 | aerr("missing name for func chunk?\n"); |
5340 | |
5341 | if (!scanned_ahead) { |
5342 | add_func_chunk(fasm, words[0], asmln); |
5343 | func_chunks_sorted = 0; |
e56ab892 |
5344 | } |
e56ab892 |
5345 | } |
5346 | else if (p[2] == 'E' && IS_START(p, "; END OF FUNCTION CHUNK")) |
5347 | { |
5348 | if (func_chunk_i >= 0) { |
5349 | if (func_chunk_i < func_chunk_cnt |
5350 | && IS(func_chunks[func_chunk_i].name, g_func)) |
5351 | { |
5352 | // move on to next chunk |
5353 | ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET); |
5354 | if (ret) |
5355 | aerr("seek failed for '%s' chunk #%d\n", |
5356 | g_func, func_chunk_i); |
de50b98b |
5357 | asmln = func_chunks[func_chunk_i].asmln; |
e56ab892 |
5358 | func_chunk_i++; |
5359 | } |
5360 | else { |
5361 | if (func_chunk_ret == 0) |
5362 | aerr("no return from chunk?\n"); |
5363 | fseek(fasm, func_chunk_ret, SEEK_SET); |
de50b98b |
5364 | asmln = func_chunk_ret_ln; |
e56ab892 |
5365 | func_chunk_ret = 0; |
5366 | pending_endp = 1; |
5367 | } |
1bafb621 |
5368 | } |
e56ab892 |
5369 | } |
5370 | else if (p[2] == 'F' && IS_START(p, "; FUNCTION CHUNK AT ")) { |
5371 | func_chunks_used = 1; |
5372 | p += 20; |
5373 | if (IS_START(g_func, "sub_")) { |
5374 | unsigned long addr = strtoul(p, NULL, 16); |
5375 | unsigned long f_addr = strtoul(g_func + 4, NULL, 16); |
cdfaeed7 |
5376 | if (addr > f_addr && !scanned_ahead) { |
94d447fb |
5377 | anote("scan_ahead caused by '%s', addr %lx\n", |
5378 | g_func, addr); |
cdfaeed7 |
5379 | scan_ahead(fasm); |
5380 | scanned_ahead = 1; |
5381 | func_chunks_sorted = 0; |
5382 | } |
1bafb621 |
5383 | } |
5384 | } |
5385 | continue; |
e56ab892 |
5386 | } // *p == ';' |
1bafb621 |
5387 | |
06c5d854 |
5388 | parse_words: |
a2c1d768 |
5389 | for (i = wordc; i < ARRAY_SIZE(words); i++) |
5390 | words[i][0] = 0; |
cdfaeed7 |
5391 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
bfa4a6ee |
5392 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
91977a1c |
5393 | if (*p == 0 || *p == ';') { |
5394 | wordc++; |
5395 | break; |
5396 | } |
5397 | } |
a2c1d768 |
5398 | if (*p != 0 && *p != ';') |
5399 | aerr("too many words\n"); |
91977a1c |
5400 | |
06c5d854 |
5401 | // alow asm patches in comments |
ddaf8bd7 |
5402 | if (*p == ';') { |
5403 | if (IS_START(p, "; sctpatch:")) { |
5404 | p = sskip(p + 11); |
5405 | if (*p == 0 || *p == ';') |
5406 | continue; |
5407 | goto parse_words; // lame |
5408 | } |
5409 | if (IS_START(p, "; sctproto:")) { |
5410 | sctproto = strdup(p + 11); |
5411 | } |
46b388c2 |
5412 | else if (IS_START(p, "; sctend")) { |
5413 | end = 1; |
5414 | if (!pending_endp) |
5415 | break; |
5416 | } |
06c5d854 |
5417 | } |
5418 | |
91977a1c |
5419 | if (wordc == 0) { |
5420 | // shouldn't happen |
5421 | awarn("wordc == 0?\n"); |
5422 | continue; |
5423 | } |
5424 | |
5425 | // don't care about this: |
5426 | if (words[0][0] == '.' |
5427 | || IS(words[0], "include") |
5428 | || IS(words[0], "assume") || IS(words[1], "segment") |
5429 | || IS(words[0], "align")) |
5430 | { |
5431 | continue; |
5432 | } |
5433 | |
4c45fa73 |
5434 | do_pending_endp: |
5435 | // do delayed endp processing to collect switch jumptables |
5436 | if (pending_endp) { |
46b388c2 |
5437 | if (in_func && !skip_func && !end && wordc >= 2 |
4c45fa73 |
5438 | && ((words[0][0] == 'd' && words[0][2] == 0) |
5439 | || (words[1][0] == 'd' && words[1][2] == 0))) |
5440 | { |
5441 | i = 1; |
5442 | if (words[1][0] == 'd' && words[1][2] == 0) { |
5443 | // label |
5444 | if (g_func_pd_cnt >= pd_alloc) { |
5445 | pd_alloc = pd_alloc * 2 + 16; |
5446 | g_func_pd = realloc(g_func_pd, |
5447 | sizeof(g_func_pd[0]) * pd_alloc); |
5448 | my_assert_not(g_func_pd, NULL); |
5449 | } |
5450 | pd = &g_func_pd[g_func_pd_cnt]; |
5451 | g_func_pd_cnt++; |
5452 | memset(pd, 0, sizeof(*pd)); |
5453 | strcpy(pd->label, words[0]); |
5454 | pd->type = OPT_CONST; |
5455 | pd->lmod = lmod_from_directive(words[1]); |
5456 | i = 2; |
5457 | } |
5458 | else { |
da87ae38 |
5459 | if (pd == NULL) { |
5460 | if (verbose) |
5461 | anote("skipping alignment byte?\n"); |
5462 | continue; |
5463 | } |
4c45fa73 |
5464 | lmod = lmod_from_directive(words[0]); |
5465 | if (lmod != pd->lmod) |
5466 | aerr("lmod change? %d->%d\n", pd->lmod, lmod); |
5467 | } |
5468 | |
5469 | if (pd->count_alloc < pd->count + wordc) { |
5470 | pd->count_alloc = pd->count_alloc * 2 + 14 + wordc; |
5471 | pd->d = realloc(pd->d, sizeof(pd->d[0]) * pd->count_alloc); |
5472 | my_assert_not(pd->d, NULL); |
5473 | } |
5474 | for (; i < wordc; i++) { |
5475 | if (IS(words[i], "offset")) { |
5476 | pd->type = OPT_OFFSET; |
5477 | i++; |
5478 | } |
5479 | p = strchr(words[i], ','); |
5480 | if (p != NULL) |
5481 | *p = 0; |
5482 | if (pd->type == OPT_OFFSET) |
5483 | pd->d[pd->count].u.label = strdup(words[i]); |
5484 | else |
5485 | pd->d[pd->count].u.val = parse_number(words[i]); |
5486 | pd->d[pd->count].bt_i = -1; |
5487 | pd->count++; |
5488 | } |
5489 | continue; |
5490 | } |
5491 | |
5492 | if (in_func && !skip_func) |
5493 | gen_func(fout, g_fhdr, g_func, pi); |
5494 | |
5495 | pending_endp = 0; |
5496 | in_func = 0; |
5497 | g_ida_func_attr = 0; |
5498 | skip_warned = 0; |
5499 | skip_func = 0; |
5500 | g_func[0] = 0; |
e56ab892 |
5501 | func_chunks_used = 0; |
5502 | func_chunk_i = -1; |
4c45fa73 |
5503 | if (pi != 0) { |
5504 | memset(&ops, 0, pi * sizeof(ops[0])); |
5505 | memset(g_labels, 0, pi * sizeof(g_labels[0])); |
5506 | pi = 0; |
5507 | } |
5508 | g_eqcnt = 0; |
5509 | for (i = 0; i < g_func_pd_cnt; i++) { |
5510 | pd = &g_func_pd[i]; |
5511 | if (pd->type == OPT_OFFSET) { |
5512 | for (j = 0; j < pd->count; j++) |
5513 | free(pd->d[j].u.label); |
5514 | } |
5515 | free(pd->d); |
5516 | pd->d = NULL; |
5517 | } |
5518 | g_func_pd_cnt = 0; |
5519 | pd = NULL; |
46b388c2 |
5520 | |
5521 | if (end) |
5522 | break; |
4c45fa73 |
5523 | if (wordc == 0) |
5524 | continue; |
5525 | } |
5526 | |
91977a1c |
5527 | if (IS(words[1], "proc")) { |
5528 | if (in_func) |
5529 | aerr("proc '%s' while in_func '%s'?\n", |
5530 | words[0], g_func); |
bfa4a6ee |
5531 | p = words[0]; |
ddaf8bd7 |
5532 | if (bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp)) |
bfa4a6ee |
5533 | skip_func = 1; |
91977a1c |
5534 | strcpy(g_func, words[0]); |
d4e3b5db |
5535 | set_label(0, words[0]); |
91977a1c |
5536 | in_func = 1; |
5537 | continue; |
5538 | } |
5539 | |
e56ab892 |
5540 | if (IS(words[1], "endp")) |
5541 | { |
91977a1c |
5542 | if (!in_func) |
5543 | aerr("endp '%s' while not in_func?\n", words[0]); |
5544 | if (!IS(g_func, words[0])) |
5545 | aerr("endp '%s' while in_func '%s'?\n", |
5546 | words[0], g_func); |
bfa4a6ee |
5547 | |
ddaf8bd7 |
5548 | if ((g_ida_func_attr & IDAFA_THUNK) && pi == 1 |
5549 | && ops[0].op == OP_JMP && ops[0].operand[0].had_ds) |
5550 | { |
5551 | // import jump |
5552 | skip_func = 1; |
5553 | } |
5554 | |
e56ab892 |
5555 | if (!skip_func && func_chunks_used) { |
5556 | // start processing chunks |
5557 | struct chunk_item *ci, key = { g_func, 0 }; |
5558 | |
5559 | func_chunk_ret = ftell(fasm); |
de50b98b |
5560 | func_chunk_ret_ln = asmln; |
e56ab892 |
5561 | if (!func_chunks_sorted) { |
5562 | qsort(func_chunks, func_chunk_cnt, |
5563 | sizeof(func_chunks[0]), cmp_chunks); |
5564 | func_chunks_sorted = 1; |
5565 | } |
5566 | ci = bsearch(&key, func_chunks, func_chunk_cnt, |
5567 | sizeof(func_chunks[0]), cmp_chunks); |
5568 | if (ci == NULL) |
5569 | aerr("'%s' needs chunks, but none found\n", g_func); |
5570 | func_chunk_i = ci - func_chunks; |
5571 | for (; func_chunk_i > 0; func_chunk_i--) |
5572 | if (!IS(func_chunks[func_chunk_i - 1].name, g_func)) |
5573 | break; |
5574 | |
5575 | ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET); |
5576 | if (ret) |
5577 | aerr("seek failed for '%s' chunk #%d\n", g_func, func_chunk_i); |
de50b98b |
5578 | asmln = func_chunks[func_chunk_i].asmln; |
e56ab892 |
5579 | func_chunk_i++; |
5580 | continue; |
5581 | } |
4c45fa73 |
5582 | pending_endp = 1; |
91977a1c |
5583 | continue; |
5584 | } |
5585 | |
1f84f6b3 |
5586 | if (wordc == 2 && IS(words[1], "ends")) { |
46b388c2 |
5587 | if (!multi_seg) { |
5588 | end = 1; |
5589 | if (pending_endp) |
5590 | goto do_pending_endp; |
1f84f6b3 |
5591 | break; |
46b388c2 |
5592 | } |
1f84f6b3 |
5593 | |
5594 | // scan for next text segment |
5595 | while (fgets(line, sizeof(line), fasm)) { |
5596 | asmln++; |
5597 | p = sskip(line); |
5598 | if (*p == 0 || *p == ';') |
5599 | continue; |
5600 | |
5601 | if (strstr(p, "segment para public 'CODE' use32")) |
5602 | break; |
5603 | } |
5604 | |
5605 | continue; |
5606 | } |
a2c1d768 |
5607 | |
bfa4a6ee |
5608 | p = strchr(words[0], ':'); |
5609 | if (p != NULL) { |
d4e3b5db |
5610 | set_label(pi, words[0]); |
bfa4a6ee |
5611 | continue; |
5612 | } |
5613 | |
5614 | if (!in_func || skip_func) { |
5615 | if (!skip_warned && !skip_func && g_labels[pi][0] != 0) { |
5616 | if (verbose) |
5617 | anote("skipping from '%s'\n", g_labels[pi]); |
5618 | skip_warned = 1; |
5619 | } |
5620 | g_labels[pi][0] = 0; |
5621 | continue; |
5622 | } |
5623 | |
ddaf8bd7 |
5624 | if (wordc > 1 && IS(words[1], "=")) |
5625 | { |
91977a1c |
5626 | if (wordc != 5) |
5627 | aerr("unhandled equ, wc=%d\n", wordc); |
5628 | if (g_eqcnt >= eq_alloc) { |
5629 | eq_alloc *= 2; |
5630 | g_eqs = realloc(g_eqs, eq_alloc * sizeof(g_eqs[0])); |
5631 | my_assert_not(g_eqs, NULL); |
5632 | } |
5633 | |
5634 | len = strlen(words[0]); |
5635 | if (len > sizeof(g_eqs[0].name) - 1) |
5636 | aerr("equ name too long: %d\n", len); |
5637 | strcpy(g_eqs[g_eqcnt].name, words[0]); |
5638 | |
5639 | if (!IS(words[3], "ptr")) |
5640 | aerr("unhandled equ\n"); |
5641 | if (IS(words[2], "dword")) |
5642 | g_eqs[g_eqcnt].lmod = OPLM_DWORD; |
5643 | else if (IS(words[2], "word")) |
5644 | g_eqs[g_eqcnt].lmod = OPLM_WORD; |
5645 | else if (IS(words[2], "byte")) |
5646 | g_eqs[g_eqcnt].lmod = OPLM_BYTE; |
90307a99 |
5647 | else if (IS(words[2], "qword")) |
5648 | g_eqs[g_eqcnt].lmod = OPLM_QWORD; |
91977a1c |
5649 | else |
5650 | aerr("bad lmod: '%s'\n", words[2]); |
5651 | |
5652 | g_eqs[g_eqcnt].offset = parse_number(words[4]); |
5653 | g_eqcnt++; |
5654 | continue; |
5655 | } |
5656 | |
5657 | if (pi >= ARRAY_SIZE(ops)) |
5658 | aerr("too many ops\n"); |
5659 | |
91977a1c |
5660 | parse_op(&ops[pi], words, wordc); |
ddaf8bd7 |
5661 | |
5662 | if (sctproto != NULL) { |
8eb12e72 |
5663 | if (ops[pi].op == OP_CALL || ops[pi].op == OP_JMP) |
ddaf8bd7 |
5664 | ops[pi].datap = sctproto; |
5665 | sctproto = NULL; |
5666 | } |
91977a1c |
5667 | pi++; |
91977a1c |
5668 | } |
5669 | |
5670 | fclose(fout); |
5671 | fclose(fasm); |
06c5d854 |
5672 | fclose(g_fhdr); |
91977a1c |
5673 | |
5674 | return 0; |
c36e914d |
5675 | } |
91977a1c |
5676 | |
5677 | // vim:ts=2:shiftwidth=2:expandtab |