33c35af6 |
1 | #define _GNU_SOURCE |
c36e914d |
2 | #include <stdio.h> |
3 | #include <stdlib.h> |
4 | #include <string.h> |
5 | |
6 | #include "my_assert.h" |
7 | #include "my_str.h" |
8 | |
9 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) |
10 | #define IS(w, y) !strcmp(w, y) |
39b168b8 |
11 | #define IS_START(w, y) !strncmp(w, y, strlen(y)) |
c36e914d |
12 | |
13 | #include "protoparse.h" |
14 | |
06c5d854 |
15 | static const char *asmfn; |
c36e914d |
16 | static int asmln; |
06c5d854 |
17 | static FILE *g_fhdr; |
c36e914d |
18 | |
940e8e66 |
19 | #define anote(fmt, ...) \ |
20 | printf("%s:%d: note: " fmt, asmfn, asmln, ##__VA_ARGS__) |
c36e914d |
21 | #define awarn(fmt, ...) \ |
940e8e66 |
22 | printf("%s:%d: warning: " fmt, asmfn, asmln, ##__VA_ARGS__) |
c36e914d |
23 | #define aerr(fmt, ...) do { \ |
940e8e66 |
24 | printf("%s:%d: error: " fmt, asmfn, asmln, ##__VA_ARGS__); \ |
33c35af6 |
25 | fcloseall(); \ |
c36e914d |
26 | exit(1); \ |
27 | } while (0) |
28 | |
69a3cdfc |
29 | enum op_flags { |
87bf6cec |
30 | OPF_RMD = (1 << 0), /* removed or optimized out */ |
31 | OPF_DATA = (1 << 1), /* data processing - writes to dst opr */ |
32 | OPF_FLAGS = (1 << 2), /* sets flags */ |
33 | OPF_JMP = (1 << 3), /* branches, ret and call */ |
34 | OPF_CC = (1 << 4), /* uses flags */ |
35 | OPF_TAIL = (1 << 5), /* ret or tail call */ |
7ba45c34 |
36 | OPF_RSAVE = (1 << 6), /* push/pop is local reg save/load */ |
37 | OPF_REP = (1 << 7), /* prefixed by rep */ |
38 | OPF_REPZ = (1 << 8), /* rep is repe/repz */ |
39 | OPF_REPNZ = (1 << 9), /* rep is repne/repnz */ |
c36e914d |
40 | }; |
41 | |
42 | enum op_op { |
43 | OP_INVAL, |
33c35af6 |
44 | OP_NOP, |
c36e914d |
45 | OP_PUSH, |
46 | OP_POP, |
47 | OP_MOV, |
850c9265 |
48 | OP_LEA, |
49 | OP_MOVZX, |
50 | OP_MOVSX, |
51 | OP_NOT, |
5101a5f9 |
52 | OP_CDQ, |
33c35af6 |
53 | OP_STOS, |
d4e3b5db |
54 | OP_MOVS, |
7ba45c34 |
55 | OP_CMPS, |
c36e914d |
56 | OP_RET, |
57 | OP_ADD, |
91977a1c |
58 | OP_SUB, |
850c9265 |
59 | OP_AND, |
60 | OP_OR, |
61 | OP_XOR, |
62 | OP_SHL, |
63 | OP_SHR, |
64 | OP_SAR, |
d4e3b5db |
65 | OP_ROL, |
66 | OP_ROR, |
69a3cdfc |
67 | OP_ADC, |
850c9265 |
68 | OP_SBB, |
69 | OP_INC, |
70 | OP_DEC, |
5101a5f9 |
71 | OP_NEG, |
850c9265 |
72 | OP_MUL, |
73 | OP_IMUL, |
5101a5f9 |
74 | OP_DIV, |
75 | OP_IDIV, |
c36e914d |
76 | OP_TEST, |
77 | OP_CMP, |
78 | OP_CALL, |
79 | OP_JMP, |
80 | OP_JO, |
81 | OP_JNO, |
82 | OP_JC, |
83 | OP_JNC, |
84 | OP_JZ, |
85 | OP_JNZ, |
86 | OP_JBE, |
87 | OP_JA, |
88 | OP_JS, |
89 | OP_JNS, |
90 | OP_JP, |
91 | OP_JNP, |
92 | OP_JL, |
93 | OP_JGE, |
94 | OP_JLE, |
95 | OP_JG, |
96 | }; |
97 | |
98 | enum opr_type { |
87bf6cec |
99 | OPT_UNSPEC, |
100 | OPT_REG, |
101 | OPT_REGMEM, |
102 | OPT_LABEL, |
850c9265 |
103 | OPT_OFFSET, |
87bf6cec |
104 | OPT_CONST, |
c36e914d |
105 | }; |
106 | |
107 | enum opr_lenmod { |
91977a1c |
108 | OPLM_UNSPEC, |
109 | OPLM_BYTE, |
110 | OPLM_WORD, |
111 | OPLM_DWORD, |
c36e914d |
112 | }; |
113 | |
850c9265 |
114 | #define MAX_OPERANDS 3 |
c36e914d |
115 | |
116 | struct parsed_opr { |
91977a1c |
117 | enum opr_type type; |
118 | enum opr_lenmod lmod; |
7ba45c34 |
119 | unsigned int is_ptr:1; // pointer in C |
120 | unsigned int is_array:1; // array in C |
91977a1c |
121 | int reg; |
122 | unsigned int val; |
123 | char name[256]; |
c36e914d |
124 | }; |
125 | |
126 | struct parsed_op { |
91977a1c |
127 | enum op_op op; |
128 | struct parsed_opr operand[MAX_OPERANDS]; |
69a3cdfc |
129 | unsigned int flags; |
91977a1c |
130 | int operand_cnt; |
69a3cdfc |
131 | int regmask_src; // all referensed regs |
132 | int regmask_dst; |
940e8e66 |
133 | int pfomask; // flagop: parsed_flag_op that can't be delayed |
134 | int argmask; // push: args that are altered before call |
135 | int cc_scratch; // scratch storage during analysis |
4c45fa73 |
136 | int bt_i; // branch target for branches |
137 | struct parsed_data *btj;// branch targets for jumptables |
91977a1c |
138 | void *datap; |
139 | }; |
140 | |
69a3cdfc |
141 | // datap: |
69a3cdfc |
142 | // OP_CALL - ptr to parsed_proto |
143 | // (OPF_CC) - point to corresponding (OPF_FLAGS) |
144 | |
91977a1c |
145 | struct parsed_equ { |
146 | char name[64]; |
147 | enum opr_lenmod lmod; |
148 | int offset; |
c36e914d |
149 | }; |
150 | |
4c45fa73 |
151 | struct parsed_data { |
152 | char label[256]; |
153 | enum opr_type type; |
154 | enum opr_lenmod lmod; |
155 | int count; |
156 | int count_alloc; |
157 | struct { |
158 | union { |
159 | char *label; |
63df67be |
160 | unsigned int val; |
4c45fa73 |
161 | } u; |
162 | int bt_i; |
163 | } *d; |
164 | }; |
165 | |
166 | struct label_ref { |
167 | int i; |
168 | struct label_ref *next; |
169 | }; |
170 | |
1bafb621 |
171 | enum ida_func_attr { |
172 | IDAFA_BP_FRAME = (1 << 0), |
173 | IDAFA_LIB_FUNC = (1 << 1), |
174 | IDAFA_STATIC = (1 << 2), |
175 | IDAFA_NORETURN = (1 << 3), |
176 | IDAFA_THUNK = (1 << 4), |
177 | IDAFA_FPD = (1 << 5), |
178 | }; |
179 | |
180 | #define MAX_OPS 4096 |
c36e914d |
181 | |
182 | static struct parsed_op ops[MAX_OPS]; |
91977a1c |
183 | static struct parsed_equ *g_eqs; |
184 | static int g_eqcnt; |
185 | static char g_labels[MAX_OPS][32]; |
4c45fa73 |
186 | static struct label_ref g_label_refs[MAX_OPS]; |
91977a1c |
187 | static struct parsed_proto g_func_pp; |
4c45fa73 |
188 | static struct parsed_data *g_func_pd; |
189 | static int g_func_pd_cnt; |
91977a1c |
190 | static char g_func[256]; |
191 | static char g_comment[256]; |
192 | static int g_bp_frame; |
1bafb621 |
193 | static int g_sp_frame; |
194 | static int g_stack_fsz; |
4c45fa73 |
195 | static int g_ida_func_attr; |
91977a1c |
196 | #define ferr(op_, fmt, ...) do { \ |
63df67be |
197 | printf("error:%s:#%zd: '%s': " fmt, g_func, (op_) - ops, \ |
850c9265 |
198 | dump_op(op_), ##__VA_ARGS__); \ |
33c35af6 |
199 | fcloseall(); \ |
91977a1c |
200 | exit(1); \ |
201 | } while (0) |
202 | |
203 | #define MAX_REGS 8 |
204 | |
205 | const char *regs_r32[] = { "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp" }; |
206 | const char *regs_r16[] = { "ax", "bx", "cx", "dx", "si", "di", "bp", "sp" }; |
207 | const char *regs_r8l[] = { "al", "bl", "cl", "dl" }; |
208 | const char *regs_r8h[] = { "ah", "bh", "ch", "dh" }; |
209 | |
210 | enum x86_regs { xUNSPEC = -1, xAX, xBX, xCX, xDX, xSI, xDI, xBP, xSP }; |
211 | |
69a3cdfc |
212 | // possible basic comparison types (without inversion) |
213 | enum parsed_flag_op { |
214 | PFO_O, // 0 OF=1 |
215 | PFO_C, // 2 CF=1 |
216 | PFO_Z, // 4 ZF=1 |
217 | PFO_BE, // 6 CF=1||ZF=1 |
218 | PFO_S, // 8 SF=1 |
219 | PFO_P, // a PF=1 |
220 | PFO_L, // c SF!=OF |
221 | PFO_LE, // e ZF=1||SF!=OF |
222 | }; |
223 | |
224 | static const char *parsed_flag_op_names[] = { |
225 | "o", "c", "z", "be", "s", "p", "l", "le" |
226 | }; |
227 | |
91977a1c |
228 | static int char_array_i(const char *array[], size_t len, const char *s) |
229 | { |
230 | int i; |
c36e914d |
231 | |
91977a1c |
232 | for (i = 0; i < len; i++) |
233 | if (IS(s, array[i])) |
234 | return i; |
c36e914d |
235 | |
91977a1c |
236 | return -1; |
237 | } |
238 | |
63df67be |
239 | static void printf_number(char *buf, size_t buf_size, |
240 | unsigned long number) |
91977a1c |
241 | { |
5101a5f9 |
242 | // output in C-friendly form |
243 | snprintf(buf, buf_size, number < 10 ? "%lu" : "0x%02lx", number); |
244 | } |
91977a1c |
245 | |
5101a5f9 |
246 | static int parse_reg(enum opr_lenmod *reg_lmod, const char *s) |
247 | { |
248 | int reg; |
91977a1c |
249 | |
5101a5f9 |
250 | reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s); |
251 | if (reg >= 0) { |
252 | *reg_lmod = OPLM_DWORD; |
253 | return reg; |
91977a1c |
254 | } |
5101a5f9 |
255 | reg = char_array_i(regs_r16, ARRAY_SIZE(regs_r16), s); |
256 | if (reg >= 0) { |
257 | *reg_lmod = OPLM_WORD; |
258 | return reg; |
259 | } |
260 | reg = char_array_i(regs_r8h, ARRAY_SIZE(regs_r8h), s); |
261 | if (reg >= 0) { |
262 | *reg_lmod = OPLM_BYTE; |
263 | return reg; |
264 | } |
265 | reg = char_array_i(regs_r8l, ARRAY_SIZE(regs_r8l), s); |
266 | if (reg >= 0) { |
267 | *reg_lmod = OPLM_BYTE; |
268 | return reg; |
850c9265 |
269 | } |
270 | |
271 | return -1; |
91977a1c |
272 | } |
273 | |
63df67be |
274 | static unsigned long parse_number(const char *number) |
91977a1c |
275 | { |
276 | int len = strlen(number); |
277 | const char *p = number; |
278 | char *endp = NULL; |
63df67be |
279 | unsigned long ret; |
91977a1c |
280 | int neg = 0; |
281 | int bad; |
91977a1c |
282 | |
283 | if (*p == '-') { |
284 | neg = 1; |
285 | p++; |
286 | } |
287 | if (len > 1 && *p == '0') |
288 | p++; |
289 | if (number[len - 1] == 'h') { |
63df67be |
290 | ret = strtoul(p, &endp, 16); |
91977a1c |
291 | bad = (*endp != 'h'); |
292 | } |
293 | else { |
63df67be |
294 | ret = strtoul(p, &endp, 10); |
91977a1c |
295 | bad = (*endp != 0); |
296 | } |
297 | if (bad) |
298 | aerr("number parsing failed\n"); |
299 | if (neg) |
300 | ret = -ret; |
301 | return ret; |
302 | } |
303 | |
5101a5f9 |
304 | static int parse_indmode(char *name, int *regmask, int need_c_cvt) |
305 | { |
306 | enum opr_lenmod lmod; |
307 | char cvtbuf[256]; |
308 | char *d = cvtbuf; |
309 | char *s = name; |
310 | char w[64]; |
311 | long number; |
312 | int reg; |
313 | int c = 0; |
314 | |
315 | *d = 0; |
316 | |
317 | while (*s != 0) { |
318 | d += strlen(d); |
319 | while (my_isblank(*s)) |
320 | s++; |
321 | for (; my_issep(*s); d++, s++) |
322 | *d = *s; |
323 | while (my_isblank(*s)) |
324 | s++; |
325 | *d = 0; |
326 | |
87bf6cec |
327 | // skip 'ds:' prefix |
39b168b8 |
328 | if (IS_START(s, "ds:")) |
87bf6cec |
329 | s += 3; |
330 | |
5101a5f9 |
331 | s = next_idt(w, sizeof(w), s); |
332 | if (w[0] == 0) |
333 | break; |
334 | c++; |
335 | |
336 | reg = parse_reg(&lmod, w); |
337 | if (reg >= 0) { |
338 | *regmask |= 1 << reg; |
339 | goto pass; |
340 | } |
341 | |
342 | if ('0' <= w[0] && w[0] <= '9') { |
343 | number = parse_number(w); |
344 | printf_number(d, sizeof(cvtbuf) - (d - cvtbuf), number); |
345 | continue; |
346 | } |
347 | |
348 | // probably some label/identifier - pass |
349 | |
350 | pass: |
351 | snprintf(d, sizeof(cvtbuf) - (d - cvtbuf), "%s", w); |
352 | } |
353 | |
354 | if (need_c_cvt) |
355 | strcpy(name, cvtbuf); |
356 | |
357 | return c; |
358 | } |
359 | |
4c45fa73 |
360 | static int is_reg_in_str(const char *s) |
361 | { |
362 | int i; |
363 | |
364 | if (strlen(s) < 3 || (s[3] && !my_issep(s[3]) && !my_isblank(s[3]))) |
365 | return 0; |
366 | |
367 | for (i = 0; i < ARRAY_SIZE(regs_r32); i++) |
368 | if (!strncmp(s, regs_r32[i], 3)) |
369 | return 1; |
370 | |
371 | return 0; |
372 | } |
373 | |
374 | static const char *parse_stack_el(const char *name, char *extra_reg) |
d4e3b5db |
375 | { |
4c45fa73 |
376 | const char *p, *p2, *s; |
1bafb621 |
377 | char *endp = NULL; |
d4e3b5db |
378 | char buf[32]; |
1bafb621 |
379 | long val; |
d4e3b5db |
380 | int len; |
381 | |
4c45fa73 |
382 | p = name; |
383 | if (IS_START(p + 3, "+ebp+") && is_reg_in_str(p)) { |
384 | p += 4; |
385 | if (extra_reg != NULL) { |
386 | strncpy(extra_reg, name, 3); |
387 | extra_reg[4] = 0; |
388 | } |
d4e3b5db |
389 | } |
4c45fa73 |
390 | |
391 | if (IS_START(p, "ebp+")) { |
392 | p += 4; |
393 | |
394 | p2 = strchr(p, '+'); |
395 | if (p2 != NULL && is_reg_in_str(p)) { |
396 | if (extra_reg != NULL) { |
397 | strncpy(extra_reg, p, p2 - p); |
398 | extra_reg[p2 - p] = 0; |
399 | } |
400 | p = p2 + 1; |
401 | } |
402 | |
403 | if (!('0' <= *p && *p <= '9')) |
404 | return p; |
405 | |
406 | return NULL; |
407 | } |
408 | |
39b168b8 |
409 | if (!IS_START(name, "esp+")) |
d4e3b5db |
410 | return NULL; |
411 | |
412 | p = strchr(name + 4, '+'); |
413 | if (p) { |
1bafb621 |
414 | // must be a number after esp+, already converted to 0x.. |
415 | s = name + 4; |
416 | if (!('0' <= *s && *s <= '9')) { |
417 | aerr("%s nan?\n", __func__); |
d4e3b5db |
418 | return NULL; |
1bafb621 |
419 | } |
420 | if (s[0] == '0' && s[1] == 'x') |
421 | s += 2; |
422 | len = p - s; |
d4e3b5db |
423 | if (len < sizeof(buf) - 1) { |
1bafb621 |
424 | strncpy(buf, s, len); |
d4e3b5db |
425 | buf[len] = 0; |
1bafb621 |
426 | val = strtol(buf, &endp, 16); |
427 | if (val == 0 || *endp != 0) { |
428 | aerr("%s num parse fail for '%s'\n", __func__, buf); |
429 | return NULL; |
430 | } |
d4e3b5db |
431 | } |
432 | p++; |
433 | } |
434 | else |
435 | p = name + 4; |
436 | |
437 | if ('0' <= *p && *p <= '9') |
438 | return NULL; |
439 | |
440 | return p; |
441 | } |
442 | |
850c9265 |
443 | static int guess_lmod_from_name(struct parsed_opr *opr) |
444 | { |
445 | if (!strncmp(opr->name, "dword_", 6)) { |
446 | opr->lmod = OPLM_DWORD; |
447 | return 1; |
448 | } |
449 | if (!strncmp(opr->name, "word_", 5)) { |
450 | opr->lmod = OPLM_WORD; |
451 | return 1; |
452 | } |
453 | if (!strncmp(opr->name, "byte_", 5)) { |
454 | opr->lmod = OPLM_BYTE; |
455 | return 1; |
456 | } |
457 | return 0; |
458 | } |
459 | |
3ebea2cf |
460 | static int guess_lmod_from_c_type(enum opr_lenmod *lmod, |
461 | const struct parsed_type *c_type) |
06c5d854 |
462 | { |
06c5d854 |
463 | static const char *dword_types[] = { |
464 | "int", "_DWORD", "DWORD", "HANDLE", "HWND", "HMODULE", |
465 | }; |
466 | static const char *word_types[] = { |
467 | "__int16", "unsigned __int16", |
468 | }; |
469 | static const char *byte_types[] = { |
470 | "char", "__int8", "unsigned __int8", "BYTE", |
471 | }; |
3ebea2cf |
472 | const char *n; |
06c5d854 |
473 | int i; |
474 | |
3ebea2cf |
475 | if (c_type->is_ptr) { |
476 | *lmod = OPLM_DWORD; |
06c5d854 |
477 | return 1; |
478 | } |
479 | |
3ebea2cf |
480 | n = skip_type_mod(c_type->name); |
06c5d854 |
481 | |
3ebea2cf |
482 | for (i = 0; i < ARRAY_SIZE(dword_types); i++) { |
483 | if (IS(n, dword_types[i])) { |
484 | *lmod = OPLM_DWORD; |
06c5d854 |
485 | return 1; |
486 | } |
487 | } |
488 | |
489 | for (i = 0; i < ARRAY_SIZE(word_types); i++) { |
3ebea2cf |
490 | if (IS(n, word_types[i])) { |
491 | *lmod = OPLM_WORD; |
06c5d854 |
492 | return 1; |
493 | } |
494 | } |
495 | |
496 | for (i = 0; i < ARRAY_SIZE(byte_types); i++) { |
3ebea2cf |
497 | if (IS(n, byte_types[i])) { |
498 | *lmod = OPLM_BYTE; |
06c5d854 |
499 | return 1; |
500 | } |
501 | } |
502 | |
06c5d854 |
503 | return 0; |
504 | } |
505 | |
4c45fa73 |
506 | static enum opr_type lmod_from_directive(const char *d) |
507 | { |
508 | if (IS(d, "dd")) |
509 | return OPLM_DWORD; |
510 | else if (IS(d, "dw")) |
511 | return OPLM_WORD; |
512 | else if (IS(d, "db")) |
513 | return OPLM_BYTE; |
514 | |
515 | aerr("unhandled directive: '%s'\n", d); |
516 | return OPLM_UNSPEC; |
517 | } |
518 | |
5101a5f9 |
519 | static void setup_reg_opr(struct parsed_opr *opr, int reg, enum opr_lenmod lmod, |
520 | int *regmask) |
521 | { |
522 | opr->type = OPT_REG; |
523 | opr->reg = reg; |
524 | opr->lmod = lmod; |
525 | *regmask |= 1 << reg; |
526 | } |
527 | |
39b168b8 |
528 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
529 | int *extra_offs); |
87bf6cec |
530 | |
69a3cdfc |
531 | static int parse_operand(struct parsed_opr *opr, |
532 | int *regmask, int *regmask_indirect, |
1bafb621 |
533 | char words[16][256], int wordc, int w, unsigned int op_flags) |
c36e914d |
534 | { |
06c5d854 |
535 | struct parsed_proto pp; |
850c9265 |
536 | enum opr_lenmod tmplmod; |
63df67be |
537 | unsigned long number; |
850c9265 |
538 | int ret, len; |
1bafb621 |
539 | int wordc_in; |
39b168b8 |
540 | char *tmp; |
850c9265 |
541 | int i; |
c36e914d |
542 | |
1bafb621 |
543 | if (w >= wordc) |
544 | aerr("parse_operand w %d, wordc %d\n", w, wordc); |
c36e914d |
545 | |
1bafb621 |
546 | opr->reg = xUNSPEC; |
91977a1c |
547 | |
1bafb621 |
548 | for (i = w; i < wordc; i++) { |
549 | len = strlen(words[i]); |
550 | if (words[i][len - 1] == ',') { |
551 | words[i][len - 1] = 0; |
552 | wordc = i + 1; |
553 | break; |
554 | } |
555 | } |
c36e914d |
556 | |
1bafb621 |
557 | wordc_in = wordc - w; |
c36e914d |
558 | |
1bafb621 |
559 | if ((op_flags & OPF_JMP) && wordc_in > 0 |
560 | && !('0' <= words[w][0] && words[w][0] <= '9')) |
561 | { |
562 | const char *label = NULL; |
563 | |
564 | if (wordc_in == 3 && !strncmp(words[w], "near", 4) |
565 | && IS(words[w + 1], "ptr")) |
566 | label = words[w + 2]; |
567 | else if (wordc_in == 2 && IS(words[w], "short")) |
568 | label = words[w + 1]; |
569 | else if (wordc_in == 1 |
570 | && strchr(words[w], '[') == NULL |
571 | && parse_reg(&tmplmod, words[w]) < 0) |
572 | label = words[w]; |
573 | |
574 | if (label != NULL) { |
575 | opr->type = OPT_LABEL; |
39b168b8 |
576 | if (IS_START(label, "ds:")) |
577 | label += 3; |
1bafb621 |
578 | strcpy(opr->name, label); |
579 | return wordc; |
580 | } |
581 | } |
c36e914d |
582 | |
1bafb621 |
583 | if (wordc_in >= 3) { |
584 | if (IS(words[w + 1], "ptr")) { |
585 | if (IS(words[w], "dword")) |
586 | opr->lmod = OPLM_DWORD; |
587 | else if (IS(words[w], "word")) |
588 | opr->lmod = OPLM_WORD; |
589 | else if (IS(words[w], "byte")) |
590 | opr->lmod = OPLM_BYTE; |
591 | else |
592 | aerr("type parsing failed\n"); |
593 | w += 2; |
594 | wordc_in = wordc - w; |
595 | } |
596 | } |
597 | |
39b168b8 |
598 | if (wordc_in == 2) { |
599 | if (IS(words[w], "offset")) { |
600 | opr->type = OPT_OFFSET; |
601 | strcpy(opr->name, words[w + 1]); |
602 | return wordc; |
603 | } |
604 | if (IS(words[w], "(offset")) { |
605 | char *p = strchr(words[w + 1], ')'); |
606 | if (p == NULL) |
607 | aerr("parse of bracketed offset failed\n"); |
608 | *p = 0; |
609 | opr->type = OPT_OFFSET; |
610 | strcpy(opr->name, words[w + 1]); |
611 | return wordc; |
612 | } |
1bafb621 |
613 | } |
c36e914d |
614 | |
1bafb621 |
615 | if (wordc_in != 1) |
850c9265 |
616 | aerr("parse_operand 1 word expected\n"); |
c36e914d |
617 | |
39b168b8 |
618 | tmp = words[w]; |
619 | if (IS_START(tmp, "ds:")) |
620 | tmp += 3; |
621 | strcpy(opr->name, tmp); |
c36e914d |
622 | |
850c9265 |
623 | if (words[w][0] == '[') { |
624 | opr->type = OPT_REGMEM; |
625 | ret = sscanf(words[w], "[%[^]]]", opr->name); |
626 | if (ret != 1) |
627 | aerr("[] parse failure\n"); |
87bf6cec |
628 | |
5101a5f9 |
629 | parse_indmode(opr->name, regmask_indirect, 1); |
4c45fa73 |
630 | if (opr->lmod == OPLM_UNSPEC && parse_stack_el(opr->name, NULL)) { |
87bf6cec |
631 | // might be an equ |
d4e3b5db |
632 | struct parsed_equ *eq = |
4c45fa73 |
633 | equ_find(NULL, parse_stack_el(opr->name, NULL), &i); |
87bf6cec |
634 | if (eq) |
635 | opr->lmod = eq->lmod; |
636 | } |
850c9265 |
637 | return wordc; |
638 | } |
639 | else if (strchr(words[w], '[')) { |
640 | // label[reg] form |
641 | opr->type = OPT_REGMEM; |
642 | if (opr->lmod == OPLM_UNSPEC) |
643 | guess_lmod_from_name(opr); |
5101a5f9 |
644 | parse_indmode(strchr(words[w], '['), regmask_indirect, 0); |
850c9265 |
645 | return wordc; |
646 | } |
647 | else if (('0' <= words[w][0] && words[w][0] <= '9') |
648 | || words[w][0] == '-') |
649 | { |
5101a5f9 |
650 | number = parse_number(words[w]); |
91977a1c |
651 | opr->type = OPT_CONST; |
5101a5f9 |
652 | opr->val = number; |
653 | printf_number(opr->name, sizeof(opr->name), number); |
91977a1c |
654 | return wordc; |
850c9265 |
655 | } |
c36e914d |
656 | |
5101a5f9 |
657 | ret = parse_reg(&tmplmod, opr->name); |
658 | if (ret >= 0) { |
659 | setup_reg_opr(opr, ret, tmplmod, regmask); |
850c9265 |
660 | return wordc; |
661 | } |
662 | |
663 | // most likely var in data segment |
664 | opr->type = OPT_LABEL; |
06c5d854 |
665 | |
666 | ret = proto_parse(g_fhdr, opr->name, &pp); |
667 | if (ret == 0) { |
668 | if (pp.is_fptr) { |
669 | opr->lmod = OPLM_DWORD; |
670 | opr->is_ptr = 1; |
671 | } |
3ebea2cf |
672 | else if (opr->lmod == OPLM_UNSPEC) { |
673 | if (!guess_lmod_from_c_type(&opr->lmod, &pp.type)) |
674 | anote("unhandled C type '%s' for '%s'\n", pp.type.name, opr->name); |
675 | } |
676 | opr->is_ptr = pp.type.is_ptr; |
677 | opr->is_array = pp.type.is_array; |
06c5d854 |
678 | } |
64c59faf |
679 | proto_release(&pp); |
06c5d854 |
680 | |
850c9265 |
681 | if (opr->lmod == OPLM_UNSPEC) |
682 | guess_lmod_from_name(opr); |
850c9265 |
683 | return wordc; |
c36e914d |
684 | } |
685 | |
33c35af6 |
686 | static const struct { |
687 | const char *name; |
688 | unsigned int flags; |
689 | } pref_table[] = { |
690 | { "rep", OPF_REP }, |
7ba45c34 |
691 | { "repe", OPF_REP|OPF_REPZ }, |
692 | { "repz", OPF_REP|OPF_REPZ }, |
693 | { "repne", OPF_REP|OPF_REPNZ }, |
694 | { "repnz", OPF_REP|OPF_REPNZ }, |
33c35af6 |
695 | }; |
696 | |
c36e914d |
697 | static const struct { |
850c9265 |
698 | const char *name; |
699 | enum op_op op; |
69a3cdfc |
700 | unsigned int minopr; |
701 | unsigned int maxopr; |
702 | unsigned int flags; |
c36e914d |
703 | } op_table[] = { |
33c35af6 |
704 | { "nop", OP_NOP, 0, 0, 0 }, |
69a3cdfc |
705 | { "push", OP_PUSH, 1, 1, 0 }, |
706 | { "pop", OP_POP, 1, 1, OPF_DATA }, |
707 | { "mov" , OP_MOV, 2, 2, OPF_DATA }, |
708 | { "lea", OP_LEA, 2, 2, OPF_DATA }, |
709 | { "movzx",OP_MOVZX, 2, 2, OPF_DATA }, |
710 | { "movsx",OP_MOVSX, 2, 2, OPF_DATA }, |
711 | { "not", OP_NOT, 1, 1, OPF_DATA }, |
5101a5f9 |
712 | { "cdq", OP_CDQ, 0, 0, OPF_DATA }, |
33c35af6 |
713 | { "stosb",OP_STOS, 0, 0, OPF_DATA }, |
714 | { "stosw",OP_STOS, 0, 0, OPF_DATA }, |
715 | { "stosd",OP_STOS, 0, 0, OPF_DATA }, |
d4e3b5db |
716 | { "movsb",OP_MOVS, 0, 0, OPF_DATA }, |
717 | { "movsw",OP_MOVS, 0, 0, OPF_DATA }, |
718 | { "movsd",OP_MOVS, 0, 0, OPF_DATA }, |
7ba45c34 |
719 | { "cmpsb",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
720 | { "cmpsw",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
721 | { "cmpsd",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
722 | { "add", OP_ADD, 2, 2, OPF_DATA|OPF_FLAGS }, |
723 | { "sub", OP_SUB, 2, 2, OPF_DATA|OPF_FLAGS }, |
724 | { "and", OP_AND, 2, 2, OPF_DATA|OPF_FLAGS }, |
725 | { "or", OP_OR, 2, 2, OPF_DATA|OPF_FLAGS }, |
726 | { "xor", OP_XOR, 2, 2, OPF_DATA|OPF_FLAGS }, |
727 | { "shl", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
728 | { "shr", OP_SHR, 2, 2, OPF_DATA|OPF_FLAGS }, |
729 | { "sal", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
730 | { "sar", OP_SAR, 2, 2, OPF_DATA|OPF_FLAGS }, |
d4e3b5db |
731 | { "rol", OP_ROL, 2, 2, OPF_DATA|OPF_FLAGS }, |
732 | { "ror", OP_ROR, 2, 2, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
733 | { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC }, |
69a3cdfc |
734 | { "sbb", OP_SBB, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC }, |
735 | { "inc", OP_INC, 1, 1, OPF_DATA|OPF_FLAGS }, |
736 | { "dec", OP_DEC, 1, 1, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
737 | { "neg", OP_NEG, 1, 1, OPF_DATA|OPF_FLAGS }, |
738 | { "mul", OP_MUL, 1, 1, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
739 | { "imul", OP_IMUL, 1, 3, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
740 | { "div", OP_DIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
741 | { "idiv", OP_IDIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
742 | { "test", OP_TEST, 2, 2, OPF_FLAGS }, |
743 | { "cmp", OP_CMP, 2, 2, OPF_FLAGS }, |
87bf6cec |
744 | { "retn", OP_RET, 0, 1, OPF_JMP|OPF_TAIL }, |
745 | { "call", OP_CALL, 1, 1, OPF_JMP|OPF_FLAGS }, |
69a3cdfc |
746 | { "jmp", OP_JMP, 1, 1, OPF_JMP }, |
747 | { "jo", OP_JO, 1, 1, OPF_JMP|OPF_CC }, // 70 OF=1 |
748 | { "jno", OP_JNO, 1, 1, OPF_JMP|OPF_CC }, // 71 OF=0 |
749 | { "jc", OP_JC, 1, 1, OPF_JMP|OPF_CC }, // 72 CF=1 |
750 | { "jb", OP_JC, 1, 1, OPF_JMP|OPF_CC }, // 72 |
751 | { "jnc", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73 CF=0 |
33c35af6 |
752 | { "jnb", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73 |
69a3cdfc |
753 | { "jae", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73 |
754 | { "jz", OP_JZ, 1, 1, OPF_JMP|OPF_CC }, // 74 ZF=1 |
755 | { "je", OP_JZ, 1, 1, OPF_JMP|OPF_CC }, // 74 |
756 | { "jnz", OP_JNZ, 1, 1, OPF_JMP|OPF_CC }, // 75 ZF=0 |
757 | { "jne", OP_JNZ, 1, 1, OPF_JMP|OPF_CC }, // 75 |
758 | { "jbe", OP_JBE, 1, 1, OPF_JMP|OPF_CC }, // 76 CF=1 || ZF=1 |
759 | { "jna", OP_JBE, 1, 1, OPF_JMP|OPF_CC }, // 76 |
760 | { "ja", OP_JA, 1, 1, OPF_JMP|OPF_CC }, // 77 CF=0 && ZF=0 |
761 | { "jnbe", OP_JA, 1, 1, OPF_JMP|OPF_CC }, // 77 |
762 | { "js", OP_JS, 1, 1, OPF_JMP|OPF_CC }, // 78 SF=1 |
763 | { "jns", OP_JNS, 1, 1, OPF_JMP|OPF_CC }, // 79 SF=0 |
764 | { "jp", OP_JP, 1, 1, OPF_JMP|OPF_CC }, // 7a PF=1 |
765 | { "jpe", OP_JP, 1, 1, OPF_JMP|OPF_CC }, // 7a |
766 | { "jnp", OP_JNP, 1, 1, OPF_JMP|OPF_CC }, // 7b PF=0 |
767 | { "jpo", OP_JNP, 1, 1, OPF_JMP|OPF_CC }, // 7b |
768 | { "jl", OP_JL, 1, 1, OPF_JMP|OPF_CC }, // 7c SF!=OF |
769 | { "jnge", OP_JL, 1, 1, OPF_JMP|OPF_CC }, // 7c |
770 | { "jge", OP_JGE, 1, 1, OPF_JMP|OPF_CC }, // 7d SF=OF |
771 | { "jnl", OP_JGE, 1, 1, OPF_JMP|OPF_CC }, // 7d |
772 | { "jle", OP_JLE, 1, 1, OPF_JMP|OPF_CC }, // 7e ZF=1 || SF!=OF |
773 | { "jng", OP_JLE, 1, 1, OPF_JMP|OPF_CC }, // 7e |
774 | { "jg", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f ZF=0 && SF=OF |
775 | { "jnle", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f |
5101a5f9 |
776 | { "seto", OP_JO, 1, 1, OPF_DATA|OPF_CC }, |
777 | { "setno", OP_JNO, 1, 1, OPF_DATA|OPF_CC }, |
778 | { "setc", OP_JC, 1, 1, OPF_DATA|OPF_CC }, |
779 | { "setb", OP_JC, 1, 1, OPF_DATA|OPF_CC }, |
780 | { "setnc", OP_JNC, 1, 1, OPF_DATA|OPF_CC }, |
781 | { "setae", OP_JNC, 1, 1, OPF_DATA|OPF_CC }, |
782 | { "setz", OP_JZ, 1, 1, OPF_DATA|OPF_CC }, |
783 | { "sete", OP_JZ, 1, 1, OPF_DATA|OPF_CC }, |
784 | { "setnz", OP_JNZ, 1, 1, OPF_DATA|OPF_CC }, |
785 | { "setne", OP_JNZ, 1, 1, OPF_DATA|OPF_CC }, |
786 | { "setbe", OP_JBE, 1, 1, OPF_DATA|OPF_CC }, |
787 | { "setna", OP_JBE, 1, 1, OPF_DATA|OPF_CC }, |
788 | { "seta", OP_JA, 1, 1, OPF_DATA|OPF_CC }, |
789 | { "setnbe", OP_JA, 1, 1, OPF_DATA|OPF_CC }, |
790 | { "sets", OP_JS, 1, 1, OPF_DATA|OPF_CC }, |
791 | { "setns", OP_JNS, 1, 1, OPF_DATA|OPF_CC }, |
792 | { "setp", OP_JP, 1, 1, OPF_DATA|OPF_CC }, |
793 | { "setpe", OP_JP, 1, 1, OPF_DATA|OPF_CC }, |
794 | { "setnp", OP_JNP, 1, 1, OPF_DATA|OPF_CC }, |
795 | { "setpo", OP_JNP, 1, 1, OPF_DATA|OPF_CC }, |
796 | { "setl", OP_JL, 1, 1, OPF_DATA|OPF_CC }, |
797 | { "setnge", OP_JL, 1, 1, OPF_DATA|OPF_CC }, |
798 | { "setge", OP_JGE, 1, 1, OPF_DATA|OPF_CC }, |
799 | { "setnl", OP_JGE, 1, 1, OPF_DATA|OPF_CC }, |
800 | { "setle", OP_JLE, 1, 1, OPF_DATA|OPF_CC }, |
801 | { "setng", OP_JLE, 1, 1, OPF_DATA|OPF_CC }, |
802 | { "setg", OP_JG, 1, 1, OPF_DATA|OPF_CC }, |
803 | { "setnle", OP_JG, 1, 1, OPF_DATA|OPF_CC }, |
69a3cdfc |
804 | }; |
c36e914d |
805 | |
806 | static void parse_op(struct parsed_op *op, char words[16][256], int wordc) |
807 | { |
bfa4a6ee |
808 | enum opr_lenmod lmod = OPLM_UNSPEC; |
33c35af6 |
809 | int prefix_flags = 0; |
69a3cdfc |
810 | int regmask_ind; |
811 | int regmask; |
33c35af6 |
812 | int op_w = 0; |
91977a1c |
813 | int opr = 0; |
33c35af6 |
814 | int w = 0; |
91977a1c |
815 | int i; |
c36e914d |
816 | |
33c35af6 |
817 | for (i = 0; i < ARRAY_SIZE(pref_table); i++) { |
818 | if (IS(words[w], pref_table[i].name)) { |
819 | prefix_flags = pref_table[i].flags; |
820 | break; |
821 | } |
822 | } |
823 | |
824 | if (prefix_flags) { |
825 | if (wordc <= 1) |
826 | aerr("lone prefix: '%s'\n", words[0]); |
827 | w++; |
828 | } |
829 | |
830 | op_w = w; |
91977a1c |
831 | for (i = 0; i < ARRAY_SIZE(op_table); i++) { |
33c35af6 |
832 | if (IS(words[w], op_table[i].name)) |
69a3cdfc |
833 | break; |
834 | } |
c36e914d |
835 | |
69a3cdfc |
836 | if (i == ARRAY_SIZE(op_table)) |
837 | aerr("unhandled op: '%s'\n", words[0]); |
33c35af6 |
838 | w++; |
c36e914d |
839 | |
69a3cdfc |
840 | op->op = op_table[i].op; |
33c35af6 |
841 | op->flags = op_table[i].flags | prefix_flags; |
69a3cdfc |
842 | op->regmask_src = op->regmask_dst = 0; |
843 | |
844 | for (opr = 0; opr < op_table[i].minopr; opr++) { |
845 | regmask = regmask_ind = 0; |
846 | w = parse_operand(&op->operand[opr], ®mask, ®mask_ind, |
847 | words, wordc, w, op->flags); |
848 | |
849 | if (opr == 0 && (op->flags & OPF_DATA)) |
850 | op->regmask_dst = regmask; |
851 | // for now, mark dst as src too |
852 | op->regmask_src |= regmask | regmask_ind; |
853 | } |
c36e914d |
854 | |
69a3cdfc |
855 | for (; w < wordc && opr < op_table[i].maxopr; opr++) { |
856 | w = parse_operand(&op->operand[opr], |
857 | &op->regmask_src, &op->regmask_src, |
858 | words, wordc, w, op->flags); |
91977a1c |
859 | } |
c36e914d |
860 | |
91977a1c |
861 | if (w < wordc) |
862 | aerr("parse_op %s incomplete: %d/%d\n", |
863 | words[0], w, wordc); |
5101a5f9 |
864 | |
865 | // special cases |
866 | op->operand_cnt = opr; |
867 | if (!strncmp(op_table[i].name, "set", 3)) |
868 | op->operand[0].lmod = OPLM_BYTE; |
869 | |
870 | // ops with implicit argumets |
871 | switch (op->op) { |
872 | case OP_CDQ: |
873 | op->operand_cnt = 2; |
874 | setup_reg_opr(&op->operand[0], xDX, OPLM_DWORD, &op->regmask_dst); |
875 | setup_reg_opr(&op->operand[1], xAX, OPLM_DWORD, &op->regmask_src); |
876 | break; |
877 | |
33c35af6 |
878 | case OP_STOS: |
879 | if (op->operand_cnt != 0) |
880 | break; |
881 | if (IS(words[op_w], "stosb")) |
882 | lmod = OPLM_BYTE; |
883 | else if (IS(words[op_w], "stosw")) |
884 | lmod = OPLM_WORD; |
885 | else if (IS(words[op_w], "stosd")) |
886 | lmod = OPLM_DWORD; |
887 | op->operand_cnt = 3; |
d4e3b5db |
888 | setup_reg_opr(&op->operand[0], xDI, lmod, &op->regmask_src); |
889 | setup_reg_opr(&op->operand[1], xCX, OPLM_DWORD, &op->regmask_src); |
890 | op->regmask_dst = op->regmask_src; |
33c35af6 |
891 | setup_reg_opr(&op->operand[2], xAX, OPLM_DWORD, &op->regmask_src); |
892 | break; |
893 | |
d4e3b5db |
894 | case OP_MOVS: |
7ba45c34 |
895 | case OP_CMPS: |
d4e3b5db |
896 | if (op->operand_cnt != 0) |
897 | break; |
7ba45c34 |
898 | if (words[op_w][4] == 'b') |
d4e3b5db |
899 | lmod = OPLM_BYTE; |
7ba45c34 |
900 | else if (words[op_w][4] == 'w') |
d4e3b5db |
901 | lmod = OPLM_WORD; |
7ba45c34 |
902 | else if (words[op_w][4] == 'd') |
d4e3b5db |
903 | lmod = OPLM_DWORD; |
904 | op->operand_cnt = 3; |
905 | setup_reg_opr(&op->operand[0], xDI, lmod, &op->regmask_src); |
906 | setup_reg_opr(&op->operand[1], xSI, OPLM_DWORD, &op->regmask_src); |
907 | setup_reg_opr(&op->operand[2], xCX, OPLM_DWORD, &op->regmask_src); |
908 | op->regmask_dst = op->regmask_src; |
909 | break; |
910 | |
5101a5f9 |
911 | case OP_IMUL: |
912 | if (op->operand_cnt != 1) |
913 | break; |
914 | // fallthrough |
915 | case OP_MUL: |
916 | // singleop mul |
917 | op->regmask_dst = (1 << xDX) | (1 << xAX); |
918 | op->regmask_src |= (1 << xAX); |
919 | if (op->operand[0].lmod == OPLM_UNSPEC) |
920 | op->operand[0].lmod = OPLM_DWORD; |
921 | break; |
922 | |
923 | case OP_DIV: |
924 | case OP_IDIV: |
925 | // we could set up operands for edx:eax, but there is no real need to |
926 | // (see is_opr_modified()) |
927 | regmask = (1 << xDX) | (1 << xAX); |
928 | op->regmask_dst = regmask; |
929 | op->regmask_src |= regmask; |
930 | if (op->operand[0].lmod == OPLM_UNSPEC) |
931 | op->operand[0].lmod = OPLM_DWORD; |
932 | break; |
933 | |
934 | case OP_SHL: |
935 | case OP_SHR: |
936 | case OP_SAR: |
d4e3b5db |
937 | case OP_ROL: |
938 | case OP_ROR: |
5101a5f9 |
939 | if (op->operand[1].lmod == OPLM_UNSPEC) |
940 | op->operand[1].lmod = OPLM_BYTE; |
941 | break; |
942 | |
7ba45c34 |
943 | case OP_PUSH: |
944 | if (op->operand[0].lmod == OPLM_UNSPEC |
945 | && (op->operand[0].type == OPT_CONST |
946 | || op->operand[0].type == OPT_OFFSET |
947 | || op->operand[0].type == OPT_LABEL)) |
948 | op->operand[0].lmod = OPLM_DWORD; |
949 | break; |
950 | |
3ebea2cf |
951 | // alignment |
952 | case OP_MOV: |
953 | if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG |
954 | && op->operand[0].reg == xDI && op->operand[1].reg == xDI) |
955 | { |
956 | op->flags |= OPF_RMD; |
957 | } |
958 | break; |
959 | |
5101a5f9 |
960 | default: |
961 | break; |
962 | } |
c36e914d |
963 | } |
964 | |
850c9265 |
965 | static const char *op_name(enum op_op op) |
966 | { |
967 | int i; |
968 | |
969 | for (i = 0; i < ARRAY_SIZE(op_table); i++) |
970 | if (op_table[i].op == op) |
971 | return op_table[i].name; |
972 | |
973 | return "???"; |
974 | } |
975 | |
976 | // debug |
977 | static const char *dump_op(struct parsed_op *po) |
978 | { |
979 | static char out[128]; |
980 | char *p = out; |
981 | int i; |
982 | |
4c45fa73 |
983 | if (po == NULL) |
984 | return "???"; |
985 | |
850c9265 |
986 | snprintf(out, sizeof(out), "%s", op_name(po->op)); |
987 | for (i = 0; i < po->operand_cnt; i++) { |
988 | p += strlen(p); |
989 | if (i > 0) |
990 | *p++ = ','; |
991 | snprintf(p, sizeof(out) - (p - out), |
992 | po->operand[i].type == OPT_REGMEM ? " [%s]" : " %s", |
993 | po->operand[i].name); |
994 | } |
995 | |
996 | return out; |
997 | } |
998 | |
4c45fa73 |
999 | static const char *lmod_type_u(struct parsed_op *po, |
1000 | enum opr_lenmod lmod) |
1001 | { |
1002 | switch (lmod) { |
1003 | case OPLM_DWORD: |
1004 | return "u32"; |
1005 | case OPLM_WORD: |
1006 | return "u16"; |
1007 | case OPLM_BYTE: |
1008 | return "u8"; |
1009 | default: |
1010 | ferr(po, "invalid lmod: %d\n", lmod); |
1011 | return "(_invalid_)"; |
1012 | } |
1013 | } |
1014 | |
d4e3b5db |
1015 | static const char *lmod_cast_u(struct parsed_op *po, |
1016 | enum opr_lenmod lmod) |
1017 | { |
1018 | switch (lmod) { |
1019 | case OPLM_DWORD: |
1020 | return ""; |
1021 | case OPLM_WORD: |
1022 | return "(u16)"; |
1023 | case OPLM_BYTE: |
1024 | return "(u8)"; |
1025 | default: |
1026 | ferr(po, "invalid lmod: %d\n", lmod); |
1027 | return "(_invalid_)"; |
1028 | } |
1029 | } |
1030 | |
1031 | static const char *lmod_cast_u_ptr(struct parsed_op *po, |
1032 | enum opr_lenmod lmod) |
1033 | { |
1034 | switch (lmod) { |
1035 | case OPLM_DWORD: |
1036 | return "*(u32 *)"; |
1037 | case OPLM_WORD: |
1038 | return "*(u16 *)"; |
1039 | case OPLM_BYTE: |
1040 | return "*(u8 *)"; |
1041 | default: |
1042 | ferr(po, "invalid lmod: %d\n", lmod); |
1043 | return "(_invalid_)"; |
1044 | } |
1045 | } |
1046 | |
1047 | static const char *lmod_cast_s(struct parsed_op *po, |
1048 | enum opr_lenmod lmod) |
1049 | { |
1050 | switch (lmod) { |
1051 | case OPLM_DWORD: |
1052 | return "(s32)"; |
1053 | case OPLM_WORD: |
1054 | return "(s16)"; |
1055 | case OPLM_BYTE: |
1056 | return "(s8)"; |
1057 | default: |
1058 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
1059 | return "(_invalid_)"; |
1060 | } |
1061 | } |
1062 | |
1063 | static const char *lmod_cast(struct parsed_op *po, |
1064 | enum opr_lenmod lmod, int is_signed) |
1065 | { |
1066 | return is_signed ? |
1067 | lmod_cast_s(po, lmod) : |
1068 | lmod_cast_u(po, lmod); |
1069 | } |
1070 | |
1071 | static int lmod_bytes(struct parsed_op *po, enum opr_lenmod lmod) |
1072 | { |
1073 | switch (lmod) { |
1074 | case OPLM_DWORD: |
1075 | return 4; |
1076 | case OPLM_WORD: |
1077 | return 2; |
1078 | case OPLM_BYTE: |
1079 | return 1; |
1080 | default: |
1081 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
1082 | return 0; |
1083 | } |
1084 | } |
1085 | |
91977a1c |
1086 | static const char *opr_name(struct parsed_op *po, int opr_num) |
c36e914d |
1087 | { |
91977a1c |
1088 | if (opr_num >= po->operand_cnt) |
1089 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
1090 | return po->operand[opr_num].name; |
c36e914d |
1091 | } |
1092 | |
91977a1c |
1093 | static unsigned int opr_const(struct parsed_op *po, int opr_num) |
c36e914d |
1094 | { |
91977a1c |
1095 | if (opr_num >= po->operand_cnt) |
1096 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
1097 | if (po->operand[opr_num].type != OPT_CONST) |
1098 | ferr(po, "opr %d: const expected\n", opr_num); |
1099 | return po->operand[opr_num].val; |
1100 | } |
c36e914d |
1101 | |
91977a1c |
1102 | static const char *opr_reg_p(struct parsed_op *po, struct parsed_opr *popr) |
1103 | { |
1104 | if ((unsigned int)popr->reg >= MAX_REGS) |
1105 | ferr(po, "invalid reg: %d\n", popr->reg); |
1106 | return regs_r32[popr->reg]; |
1107 | } |
c36e914d |
1108 | |
39b168b8 |
1109 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
1110 | int *extra_offs) |
91977a1c |
1111 | { |
39b168b8 |
1112 | const char *p; |
1113 | char *endp; |
1114 | int namelen; |
850c9265 |
1115 | int i; |
1116 | |
39b168b8 |
1117 | *extra_offs = 0; |
1118 | namelen = strlen(name); |
1119 | |
1120 | p = strchr(name, '+'); |
1121 | if (p != NULL) { |
1122 | namelen = p - name; |
1123 | if (namelen <= 0) |
1124 | ferr(po, "equ parse failed for '%s'\n", name); |
1125 | |
1126 | if (IS_START(p, "0x")) |
1127 | p += 2; |
1128 | *extra_offs = strtol(p, &endp, 16); |
1129 | if (*endp != 0) |
1130 | ferr(po, "equ parse failed for '%s'\n", name); |
1131 | } |
1132 | |
850c9265 |
1133 | for (i = 0; i < g_eqcnt; i++) |
39b168b8 |
1134 | if (strncmp(g_eqs[i].name, name, namelen) == 0 |
1135 | && g_eqs[i].name[namelen] == 0) |
850c9265 |
1136 | break; |
87bf6cec |
1137 | if (i >= g_eqcnt) { |
1138 | if (po != NULL) |
1139 | ferr(po, "unresolved equ name: '%s'\n", name); |
1140 | return NULL; |
1141 | } |
850c9265 |
1142 | |
1143 | return &g_eqs[i]; |
1144 | } |
1145 | |
1bafb621 |
1146 | static void stack_frame_access(struct parsed_op *po, |
1147 | enum opr_lenmod lmod, char *buf, size_t buf_size, |
3ebea2cf |
1148 | const char *name, const char *cast, int is_src, int is_lea) |
850c9265 |
1149 | { |
3ebea2cf |
1150 | enum opr_lenmod tmp_lmod = OPLM_UNSPEC; |
850c9265 |
1151 | const char *prefix = ""; |
4f12f671 |
1152 | const char *bp_arg = NULL; |
4c45fa73 |
1153 | char ofs_reg[16] = { 0, }; |
91977a1c |
1154 | struct parsed_equ *eq; |
4f12f671 |
1155 | const char *p; |
1156 | char *endp = NULL; |
91977a1c |
1157 | int i, arg_i, arg_s; |
d4e3b5db |
1158 | int stack_ra = 0; |
39b168b8 |
1159 | int offset = 0; |
850c9265 |
1160 | int sf_ofs; |
91977a1c |
1161 | |
4f12f671 |
1162 | if (!IS_START(name, "ebp-")) { |
1163 | bp_arg = parse_stack_el(name, ofs_reg); |
1164 | snprintf(g_comment, sizeof(g_comment), "%s", bp_arg); |
1165 | eq = equ_find(po, bp_arg, &offset); |
1166 | if (eq == NULL) |
1167 | ferr(po, "detected but missing eq\n"); |
1168 | offset += eq->offset; |
1169 | } |
1170 | else { |
1171 | p = name + 4; |
1172 | if (IS_START(p, "0x")) |
1173 | p += 2; |
1174 | offset = -strtoul(p, &endp, 16); |
1175 | if (*endp != 0) |
1176 | ferr(po, "ebp- parse of '%s' failed\n", name); |
1177 | } |
39b168b8 |
1178 | |
d4e3b5db |
1179 | if (!strncmp(name, "ebp", 3)) |
1180 | stack_ra = 4; |
1181 | |
39b168b8 |
1182 | if (stack_ra <= offset && offset < stack_ra + 4) |
1183 | ferr(po, "reference to ra? %d %d\n", offset, stack_ra); |
d4e3b5db |
1184 | |
4f12f671 |
1185 | if (offset > stack_ra) |
1186 | { |
39b168b8 |
1187 | arg_i = (offset - stack_ra - 4) / 4; |
91977a1c |
1188 | if (arg_i < 0 || arg_i >= g_func_pp.argc_stack) |
4f12f671 |
1189 | { |
1190 | if (g_func_pp.is_vararg && arg_i == g_func_pp.argc_stack && is_lea) { |
1191 | // should be va_list |
1192 | if (cast[0] == 0) |
1193 | cast = "(u32)"; |
1194 | snprintf(buf, buf_size, "%sap", cast); |
1195 | return; |
1196 | } |
1197 | ferr(po, "offset %d (%s,%d) doesn't map to any arg\n", |
1198 | offset, bp_arg, arg_i); |
1199 | } |
4c45fa73 |
1200 | if (ofs_reg[0] != 0) |
7ba45c34 |
1201 | ferr(po, "offset reg on arg access?\n"); |
91977a1c |
1202 | |
1203 | for (i = arg_s = 0; i < g_func_pp.argc; i++) { |
1204 | if (g_func_pp.arg[i].reg != NULL) |
1205 | continue; |
1206 | if (arg_s == arg_i) |
1207 | break; |
1208 | arg_s++; |
1209 | } |
1210 | if (i == g_func_pp.argc) |
1211 | ferr(po, "arg %d not in prototype?\n", arg_i); |
850c9265 |
1212 | |
7ba45c34 |
1213 | switch (lmod) |
1214 | { |
1215 | case OPLM_BYTE: |
4f12f671 |
1216 | if (is_lea) |
1217 | ferr(po, "lea/byte to arg?\n"); |
7ba45c34 |
1218 | if (is_src && (offset & 3) == 0) |
1219 | snprintf(buf, buf_size, "(u8)a%d", i + 1); |
1220 | else |
1221 | snprintf(buf, buf_size, "BYTE%d(a%d)", offset & 3, i + 1); |
1222 | break; |
1223 | |
1224 | case OPLM_WORD: |
4f12f671 |
1225 | if (is_lea) |
1226 | ferr(po, "lea/word to arg?\n"); |
7ba45c34 |
1227 | if (offset & 1) |
1228 | ferr(po, "unaligned arg access\n"); |
1229 | if (is_src && (offset & 2) == 0) |
1230 | snprintf(buf, buf_size, "(u16)a%d", i + 1); |
1231 | else |
1232 | snprintf(buf, buf_size, "%sWORD(a%d)", |
1233 | (offset & 2) ? "HI" : "LO", i + 1); |
1234 | break; |
1235 | |
1236 | case OPLM_DWORD: |
1237 | if (offset & 3) |
1238 | ferr(po, "unaligned arg access\n"); |
3ebea2cf |
1239 | if (cast[0]) |
1240 | prefix = cast; |
1241 | else if (is_src) |
1242 | prefix = "(u32)"; |
4f12f671 |
1243 | snprintf(buf, buf_size, "%s%sa%d", prefix, is_lea ? "&" : "", i + 1); |
7ba45c34 |
1244 | break; |
1245 | |
1246 | default: |
1247 | ferr(po, "bp_arg bad lmod: %d\n", lmod); |
1248 | } |
1249 | |
1250 | // common problem |
3ebea2cf |
1251 | guess_lmod_from_c_type(&tmp_lmod, &g_func_pp.arg[i].type); |
1252 | if ((offset & 3) && tmp_lmod != OPLM_DWORD) |
7ba45c34 |
1253 | ferr(po, "bp_arg arg/w offset %d and type '%s'\n", |
3ebea2cf |
1254 | offset, g_func_pp.arg[i].type.name); |
91977a1c |
1255 | } |
4f12f671 |
1256 | else |
1257 | { |
1bafb621 |
1258 | if (g_stack_fsz == 0) |
1259 | ferr(po, "stack var access without stackframe\n"); |
850c9265 |
1260 | |
39b168b8 |
1261 | sf_ofs = g_stack_fsz + offset; |
850c9265 |
1262 | if (sf_ofs < 0) |
39b168b8 |
1263 | ferr(po, "bp_stack offset %d/%d\n", offset, g_stack_fsz); |
850c9265 |
1264 | |
1265 | if (is_lea) |
33c35af6 |
1266 | prefix = "(u32)&"; |
3ebea2cf |
1267 | else |
1268 | prefix = cast; |
850c9265 |
1269 | |
1270 | switch (lmod) |
1271 | { |
1272 | case OPLM_BYTE: |
7ba45c34 |
1273 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1274 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
850c9265 |
1275 | break; |
7ba45c34 |
1276 | |
850c9265 |
1277 | case OPLM_WORD: |
7ba45c34 |
1278 | if ((sf_ofs & 1) || ofs_reg[0] != 0) { |
1279 | // known unaligned or possibly unaligned |
1280 | strcat(g_comment, " unaligned"); |
1281 | if (prefix[0] == 0) |
1282 | prefix = "*(u16 *)&"; |
1283 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1284 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
1285 | break; |
1286 | } |
1287 | snprintf(buf, buf_size, "%ssf.w[%d]", prefix, sf_ofs / 2); |
850c9265 |
1288 | break; |
7ba45c34 |
1289 | |
850c9265 |
1290 | case OPLM_DWORD: |
7ba45c34 |
1291 | if ((sf_ofs & 3) || ofs_reg[0] != 0) { |
1292 | // known unaligned or possibly unaligned |
1293 | strcat(g_comment, " unaligned"); |
1294 | if (prefix[0] == 0) |
1295 | prefix = "*(u32 *)&"; |
1296 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1297 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
1298 | break; |
1299 | } |
1300 | snprintf(buf, buf_size, "%ssf.d[%d]", prefix, sf_ofs / 4); |
850c9265 |
1301 | break; |
7ba45c34 |
1302 | |
850c9265 |
1303 | default: |
1304 | ferr(po, "bp_stack bad lmod: %d\n", lmod); |
1305 | } |
91977a1c |
1306 | } |
1307 | } |
c36e914d |
1308 | |
3ebea2cf |
1309 | static void check_label_read_ref(struct parsed_op *po, const char *name) |
1310 | { |
1311 | if (IS_START(name, "sub_")) |
1312 | ferr(po, "func reference?\n"); |
1313 | } |
1314 | |
91977a1c |
1315 | static char *out_src_opr(char *buf, size_t buf_size, |
3ebea2cf |
1316 | struct parsed_op *po, struct parsed_opr *popr, const char *cast, |
1317 | int is_lea) |
91977a1c |
1318 | { |
850c9265 |
1319 | char tmp1[256], tmp2[256]; |
1320 | char expr[256]; |
1321 | int ret; |
1322 | |
3ebea2cf |
1323 | if (cast == NULL) |
1324 | cast = ""; |
1325 | |
91977a1c |
1326 | switch (popr->type) { |
1327 | case OPT_REG: |
850c9265 |
1328 | if (is_lea) |
1329 | ferr(po, "lea from reg?\n"); |
1330 | |
91977a1c |
1331 | switch (popr->lmod) { |
1332 | case OPLM_DWORD: |
3ebea2cf |
1333 | snprintf(buf, buf_size, "%s%s", cast, opr_reg_p(po, popr)); |
91977a1c |
1334 | break; |
850c9265 |
1335 | case OPLM_WORD: |
1336 | snprintf(buf, buf_size, "(u16)%s", opr_reg_p(po, popr)); |
1337 | break; |
1338 | case OPLM_BYTE: |
5101a5f9 |
1339 | if (popr->name[1] == 'h') // XXX.. |
1340 | snprintf(buf, buf_size, "(u8)(%s >> 8)", opr_reg_p(po, popr)); |
1341 | else |
1342 | snprintf(buf, buf_size, "(u8)%s", opr_reg_p(po, popr)); |
850c9265 |
1343 | break; |
91977a1c |
1344 | default: |
1345 | ferr(po, "invalid src lmod: %d\n", popr->lmod); |
1346 | } |
1347 | break; |
850c9265 |
1348 | |
91977a1c |
1349 | case OPT_REGMEM: |
4f12f671 |
1350 | if (parse_stack_el(popr->name, NULL) |
1351 | || (g_bp_frame && IS_START(popr->name, "ebp-"))) |
1352 | { |
1bafb621 |
1353 | stack_frame_access(po, popr->lmod, buf, buf_size, |
3ebea2cf |
1354 | popr->name, cast, 1, is_lea); |
91977a1c |
1355 | break; |
1356 | } |
850c9265 |
1357 | |
1358 | strcpy(expr, popr->name); |
1359 | if (strchr(expr, '[')) { |
1360 | // special case: '[' can only be left for label[reg] form |
1361 | ret = sscanf(expr, "%[^[][%[^]]]", tmp1, tmp2); |
1362 | if (ret != 2) |
1363 | ferr(po, "parse failure for '%s'\n", expr); |
33c35af6 |
1364 | snprintf(expr, sizeof(expr), "(u32)&%s + %s", tmp1, tmp2); |
850c9265 |
1365 | } |
1366 | |
1367 | // XXX: do we need more parsing? |
1368 | if (is_lea) { |
1369 | snprintf(buf, buf_size, "%s", expr); |
1370 | break; |
1371 | } |
1372 | |
3ebea2cf |
1373 | if (cast[0] == 0) |
1374 | cast = lmod_cast_u_ptr(po, popr->lmod); |
1375 | snprintf(buf, buf_size, "%s(%s)", cast, expr); |
91977a1c |
1376 | break; |
850c9265 |
1377 | |
91977a1c |
1378 | case OPT_LABEL: |
3ebea2cf |
1379 | check_label_read_ref(po, popr->name); |
1380 | if (cast[0] == 0 && popr->is_ptr) |
1381 | cast = "(u32)"; |
850c9265 |
1382 | if (is_lea) |
1383 | snprintf(buf, buf_size, "(u32)&%s", popr->name); |
1384 | else |
3ebea2cf |
1385 | snprintf(buf, buf_size, "%s%s%s", cast, popr->name, |
7ba45c34 |
1386 | popr->is_array ? "[0]" : ""); |
850c9265 |
1387 | break; |
1388 | |
1389 | case OPT_OFFSET: |
3ebea2cf |
1390 | check_label_read_ref(po, popr->name); |
1391 | if (cast[0] == 0) |
1392 | cast = "(u32)"; |
850c9265 |
1393 | if (is_lea) |
1394 | ferr(po, "lea an offset?\n"); |
3ebea2cf |
1395 | snprintf(buf, buf_size, "%s&%s", cast, popr->name); |
91977a1c |
1396 | break; |
850c9265 |
1397 | |
91977a1c |
1398 | case OPT_CONST: |
850c9265 |
1399 | if (is_lea) |
1400 | ferr(po, "lea from const?\n"); |
1401 | |
3ebea2cf |
1402 | snprintf(buf, buf_size, "%s", cast); |
1403 | ret = strlen(buf); |
1404 | printf_number(buf + ret, buf_size - ret, popr->val); |
91977a1c |
1405 | break; |
850c9265 |
1406 | |
91977a1c |
1407 | default: |
1408 | ferr(po, "invalid src type: %d\n", popr->type); |
1409 | } |
1410 | |
1411 | return buf; |
1412 | } |
c36e914d |
1413 | |
91977a1c |
1414 | static char *out_dst_opr(char *buf, size_t buf_size, |
1415 | struct parsed_op *po, struct parsed_opr *popr) |
1416 | { |
1417 | switch (popr->type) { |
1418 | case OPT_REG: |
1419 | switch (popr->lmod) { |
1420 | case OPLM_DWORD: |
1421 | snprintf(buf, buf_size, "%s", opr_reg_p(po, popr)); |
1422 | break; |
850c9265 |
1423 | case OPLM_WORD: |
1424 | // ugh.. |
1425 | snprintf(buf, buf_size, "LOWORD(%s)", opr_reg_p(po, popr)); |
1426 | break; |
1427 | case OPLM_BYTE: |
1428 | // ugh.. |
5101a5f9 |
1429 | if (popr->name[1] == 'h') // XXX.. |
1430 | snprintf(buf, buf_size, "BYTE1(%s)", opr_reg_p(po, popr)); |
1431 | else |
1432 | snprintf(buf, buf_size, "LOBYTE(%s)", opr_reg_p(po, popr)); |
850c9265 |
1433 | break; |
91977a1c |
1434 | default: |
1435 | ferr(po, "invalid dst lmod: %d\n", popr->lmod); |
1436 | } |
1437 | break; |
850c9265 |
1438 | |
1439 | case OPT_REGMEM: |
4f12f671 |
1440 | if (parse_stack_el(popr->name, NULL) |
1441 | || (g_bp_frame && IS_START(popr->name, "ebp-"))) |
1442 | { |
1bafb621 |
1443 | stack_frame_access(po, popr->lmod, buf, buf_size, |
3ebea2cf |
1444 | popr->name, "", 0, 0); |
850c9265 |
1445 | break; |
1446 | } |
1447 | |
3ebea2cf |
1448 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
850c9265 |
1449 | |
bfa4a6ee |
1450 | case OPT_LABEL: |
7ba45c34 |
1451 | snprintf(buf, buf_size, "%s%s", popr->name, |
1452 | popr->is_array ? "[0]" : ""); |
bfa4a6ee |
1453 | break; |
1454 | |
91977a1c |
1455 | default: |
1456 | ferr(po, "invalid dst type: %d\n", popr->type); |
1457 | } |
1458 | |
1459 | return buf; |
1460 | } |
c36e914d |
1461 | |
3ebea2cf |
1462 | static char *out_src_opr_u32(char *buf, size_t buf_size, |
1463 | struct parsed_op *po, struct parsed_opr *popr) |
1464 | { |
1465 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
1466 | } |
1467 | |
69a3cdfc |
1468 | static enum parsed_flag_op split_cond(struct parsed_op *po, |
940e8e66 |
1469 | enum op_op op, int *is_inv) |
91977a1c |
1470 | { |
940e8e66 |
1471 | *is_inv = 0; |
91977a1c |
1472 | |
69a3cdfc |
1473 | switch (op) { |
1474 | case OP_JO: |
1475 | return PFO_O; |
1476 | case OP_JC: |
1477 | return PFO_C; |
1478 | case OP_JZ: |
1479 | return PFO_Z; |
1480 | case OP_JBE: |
1481 | return PFO_BE; |
1482 | case OP_JS: |
1483 | return PFO_S; |
1484 | case OP_JP: |
1485 | return PFO_P; |
1486 | case OP_JL: |
1487 | return PFO_L; |
1488 | case OP_JLE: |
1489 | return PFO_LE; |
1490 | |
91977a1c |
1491 | case OP_JNO: |
940e8e66 |
1492 | *is_inv = 1; |
69a3cdfc |
1493 | return PFO_O; |
91977a1c |
1494 | case OP_JNC: |
940e8e66 |
1495 | *is_inv = 1; |
69a3cdfc |
1496 | return PFO_C; |
91977a1c |
1497 | case OP_JNZ: |
940e8e66 |
1498 | *is_inv = 1; |
69a3cdfc |
1499 | return PFO_Z; |
1500 | case OP_JA: |
940e8e66 |
1501 | *is_inv = 1; |
69a3cdfc |
1502 | return PFO_BE; |
91977a1c |
1503 | case OP_JNS: |
940e8e66 |
1504 | *is_inv = 1; |
69a3cdfc |
1505 | return PFO_S; |
91977a1c |
1506 | case OP_JNP: |
940e8e66 |
1507 | *is_inv = 1; |
69a3cdfc |
1508 | return PFO_P; |
850c9265 |
1509 | case OP_JGE: |
940e8e66 |
1510 | *is_inv = 1; |
69a3cdfc |
1511 | return PFO_L; |
91977a1c |
1512 | case OP_JG: |
940e8e66 |
1513 | *is_inv = 1; |
69a3cdfc |
1514 | return PFO_LE; |
1515 | |
1516 | case OP_ADC: |
1517 | case OP_SBB: |
1518 | return PFO_C; |
1519 | |
91977a1c |
1520 | default: |
69a3cdfc |
1521 | ferr(po, "split_cond: bad op %d\n", op); |
1522 | return -1; |
91977a1c |
1523 | } |
1524 | } |
c36e914d |
1525 | |
91977a1c |
1526 | static void out_test_for_cc(char *buf, size_t buf_size, |
940e8e66 |
1527 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv, |
69a3cdfc |
1528 | enum opr_lenmod lmod, const char *expr) |
91977a1c |
1529 | { |
69a3cdfc |
1530 | const char *cast, *scast; |
91977a1c |
1531 | |
69a3cdfc |
1532 | cast = lmod_cast_u(po, lmod); |
1533 | scast = lmod_cast_s(po, lmod); |
1534 | |
1535 | switch (pfo) { |
1536 | case PFO_Z: |
87bf6cec |
1537 | case PFO_BE: // CF=1||ZF=1; CF=0 |
850c9265 |
1538 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1539 | cast, expr, is_inv ? "!=" : "=="); |
91977a1c |
1540 | break; |
850c9265 |
1541 | |
5101a5f9 |
1542 | case PFO_S: |
1543 | case PFO_L: // SF!=OF; OF=0 |
1544 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1545 | scast, expr, is_inv ? ">=" : "<"); |
5101a5f9 |
1546 | break; |
1547 | |
87bf6cec |
1548 | case PFO_LE: // ZF=1||SF!=OF; OF=0 |
69a3cdfc |
1549 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1550 | scast, expr, is_inv ? ">" : "<="); |
850c9265 |
1551 | break; |
1552 | |
91977a1c |
1553 | default: |
69a3cdfc |
1554 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
91977a1c |
1555 | } |
1556 | } |
c36e914d |
1557 | |
850c9265 |
1558 | static void out_cmp_for_cc(char *buf, size_t buf_size, |
940e8e66 |
1559 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv, |
69a3cdfc |
1560 | enum opr_lenmod lmod, const char *expr1, const char *expr2) |
850c9265 |
1561 | { |
69a3cdfc |
1562 | const char *cast, *scast; |
850c9265 |
1563 | |
69a3cdfc |
1564 | cast = lmod_cast_u(po, lmod); |
1565 | scast = lmod_cast_s(po, lmod); |
850c9265 |
1566 | |
69a3cdfc |
1567 | switch (pfo) { |
5101a5f9 |
1568 | case PFO_C: |
1569 | // note: must be unsigned compare |
1570 | snprintf(buf, buf_size, "(%s%s %s %s%s)", |
940e8e66 |
1571 | cast, expr1, is_inv ? ">=" : "<", cast, expr2); |
5101a5f9 |
1572 | break; |
1573 | |
69a3cdfc |
1574 | case PFO_Z: |
850c9265 |
1575 | snprintf(buf, buf_size, "(%s%s %s %s%s)", |
940e8e66 |
1576 | cast, expr1, is_inv ? "!=" : "==", cast, expr2); |
850c9265 |
1577 | break; |
1578 | |
5101a5f9 |
1579 | case PFO_BE: // !a |
850c9265 |
1580 | // note: must be unsigned compare |
1581 | snprintf(buf, buf_size, "(%s%s %s %s%s)", |
940e8e66 |
1582 | cast, expr1, is_inv ? ">" : "<=", cast, expr2); |
5101a5f9 |
1583 | break; |
1584 | |
1585 | // note: must be signed compare |
1586 | case PFO_S: |
1587 | snprintf(buf, buf_size, "(%s(%s - %s) %s 0)", |
940e8e66 |
1588 | scast, expr1, expr2, is_inv ? ">=" : "<"); |
850c9265 |
1589 | break; |
1590 | |
5101a5f9 |
1591 | case PFO_L: // !ge |
850c9265 |
1592 | snprintf(buf, buf_size, "(%s%s %s %s%s)", |
940e8e66 |
1593 | scast, expr1, is_inv ? ">=" : "<", scast, expr2); |
850c9265 |
1594 | break; |
1595 | |
5101a5f9 |
1596 | case PFO_LE: |
1597 | snprintf(buf, buf_size, "(%s%s %s %s%s)", |
940e8e66 |
1598 | scast, expr1, is_inv ? ">" : "<=", scast, expr2); |
5101a5f9 |
1599 | break; |
1600 | |
850c9265 |
1601 | default: |
69a3cdfc |
1602 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
850c9265 |
1603 | } |
1604 | } |
1605 | |
69a3cdfc |
1606 | static void out_cmp_test(char *buf, size_t buf_size, |
940e8e66 |
1607 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv) |
69a3cdfc |
1608 | { |
1609 | char buf1[256], buf2[256], buf3[256]; |
1610 | |
1611 | if (po->op == OP_TEST) { |
1612 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
3ebea2cf |
1613 | out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[0]); |
69a3cdfc |
1614 | } |
1615 | else { |
3ebea2cf |
1616 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
1617 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
69a3cdfc |
1618 | snprintf(buf3, sizeof(buf3), "(%s & %s)", buf1, buf2); |
1619 | } |
940e8e66 |
1620 | out_test_for_cc(buf, buf_size, po, pfo, is_inv, |
69a3cdfc |
1621 | po->operand[0].lmod, buf3); |
1622 | } |
1623 | else if (po->op == OP_CMP) { |
3ebea2cf |
1624 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]); |
1625 | out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[1]); |
940e8e66 |
1626 | out_cmp_for_cc(buf, buf_size, po, pfo, is_inv, |
69a3cdfc |
1627 | po->operand[0].lmod, buf2, buf3); |
1628 | } |
1629 | else |
1630 | ferr(po, "%s: unhandled op: %d\n", __func__, po->op); |
1631 | } |
1632 | |
850c9265 |
1633 | static void propagate_lmod(struct parsed_op *po, struct parsed_opr *popr1, |
91977a1c |
1634 | struct parsed_opr *popr2) |
1635 | { |
1636 | if (popr1->lmod == OPLM_UNSPEC && popr2->lmod == OPLM_UNSPEC) |
1637 | ferr(po, "missing lmod for both operands\n"); |
1638 | |
1639 | if (popr1->lmod == OPLM_UNSPEC) |
1640 | popr1->lmod = popr2->lmod; |
1641 | else if (popr2->lmod == OPLM_UNSPEC) |
1642 | popr2->lmod = popr1->lmod; |
1643 | else if (popr1->lmod != popr2->lmod) |
1644 | ferr(po, "conflicting lmods: %d vs %d\n", popr1->lmod, popr2->lmod); |
1645 | } |
c36e914d |
1646 | |
850c9265 |
1647 | static const char *op_to_c(struct parsed_op *po) |
1648 | { |
1649 | switch (po->op) |
1650 | { |
1651 | case OP_ADD: |
5101a5f9 |
1652 | case OP_ADC: |
850c9265 |
1653 | return "+"; |
1654 | case OP_SUB: |
5101a5f9 |
1655 | case OP_SBB: |
850c9265 |
1656 | return "-"; |
1657 | case OP_AND: |
1658 | return "&"; |
1659 | case OP_OR: |
1660 | return "|"; |
1661 | case OP_XOR: |
1662 | return "^"; |
1663 | case OP_SHL: |
1664 | return "<<"; |
1665 | case OP_SHR: |
1666 | return ">>"; |
1667 | case OP_MUL: |
1668 | case OP_IMUL: |
1669 | return "*"; |
1670 | default: |
1671 | ferr(po, "op_to_c was supplied with %d\n", po->op); |
1672 | } |
1673 | } |
1674 | |
d4e3b5db |
1675 | static void set_flag_no_dup(struct parsed_op *po, enum op_flags flag, |
1676 | enum op_flags flag_check) |
1677 | { |
1678 | if (po->flags & flag) |
1679 | ferr(po, "flag %x already set\n", flag); |
1680 | if (po->flags & flag_check) |
1681 | ferr(po, "flag_check %x already set\n", flag_check); |
1682 | |
1683 | po->flags |= flag; |
1684 | } |
1685 | |
87bf6cec |
1686 | static int scan_for_pop(int i, int opcnt, const char *reg, |
d4e3b5db |
1687 | int magic, int depth, int *maxdepth, int do_flags) |
850c9265 |
1688 | { |
87bf6cec |
1689 | struct parsed_op *po; |
1690 | int ret = 0; |
4c45fa73 |
1691 | int j; |
87bf6cec |
1692 | |
850c9265 |
1693 | for (; i < opcnt; i++) { |
87bf6cec |
1694 | po = &ops[i]; |
1695 | if (po->cc_scratch == magic) |
1696 | break; // already checked |
1697 | po->cc_scratch = magic; |
1698 | |
1699 | if (po->flags & OPF_TAIL) |
1700 | return -1; // deadend |
1701 | |
1bafb621 |
1702 | if ((po->flags & OPF_RMD) |
1703 | || (po->op == OP_PUSH && po->argmask)) // arg push |
850c9265 |
1704 | continue; |
1705 | |
87bf6cec |
1706 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
4c45fa73 |
1707 | if (po->btj != NULL) { |
1708 | // jumptable |
1709 | for (j = 0; j < po->btj->count - 1; j++) { |
1710 | ret |= scan_for_pop(po->btj->d[j].bt_i, opcnt, reg, magic, |
1711 | depth, maxdepth, do_flags); |
1712 | if (ret < 0) |
1713 | return ret; // dead end |
1714 | } |
1715 | // follow last jumptable entry |
1716 | i = po->btj->d[j].bt_i - 1; |
1717 | continue; |
1718 | } |
1719 | |
87bf6cec |
1720 | if (po->bt_i < 0) { |
1721 | ferr(po, "dead branch\n"); |
1722 | return -1; |
1723 | } |
850c9265 |
1724 | |
87bf6cec |
1725 | if (po->flags & OPF_CC) { |
d4e3b5db |
1726 | ret |= scan_for_pop(po->bt_i, opcnt, reg, magic, |
1727 | depth, maxdepth, do_flags); |
87bf6cec |
1728 | if (ret < 0) |
1729 | return ret; // dead end |
1730 | } |
1731 | else { |
1732 | i = po->bt_i - 1; |
1733 | } |
1734 | continue; |
1735 | } |
1736 | |
d4e3b5db |
1737 | if ((po->op == OP_POP || po->op == OP_PUSH) |
1738 | && po->operand[0].type == OPT_REG |
87bf6cec |
1739 | && IS(po->operand[0].name, reg)) |
1740 | { |
d4e3b5db |
1741 | if (po->op == OP_PUSH) { |
1742 | depth++; |
1743 | if (depth > *maxdepth) |
1744 | *maxdepth = depth; |
1745 | if (do_flags) |
1746 | set_flag_no_dup(po, OPF_RSAVE, OPF_RMD); |
1747 | } |
1748 | else if (depth == 0) { |
1749 | if (do_flags) |
1750 | set_flag_no_dup(po, OPF_RMD, OPF_RSAVE); |
1751 | return 1; |
1752 | } |
1753 | else { |
1754 | depth--; |
1755 | if (depth < 0) // should not happen |
1756 | ferr(po, "fail with depth\n"); |
1757 | if (do_flags) |
1758 | set_flag_no_dup(po, OPF_RSAVE, OPF_RMD); |
1759 | } |
87bf6cec |
1760 | } |
850c9265 |
1761 | } |
1762 | |
87bf6cec |
1763 | return ret; |
850c9265 |
1764 | } |
1765 | |
69a3cdfc |
1766 | // scan for pop starting from 'ret' op (all paths) |
d4e3b5db |
1767 | static int scan_for_pop_ret(int i, int opcnt, const char *reg, |
1768 | int flag_set) |
850c9265 |
1769 | { |
1770 | int found = 0; |
1771 | int j; |
1772 | |
1773 | for (; i < opcnt; i++) { |
87bf6cec |
1774 | if (!(ops[i].flags & OPF_TAIL)) |
850c9265 |
1775 | continue; |
1776 | |
1777 | for (j = i - 1; j >= 0; j--) { |
69a3cdfc |
1778 | if (ops[j].flags & OPF_RMD) |
1779 | continue; |
1780 | if (ops[j].flags & OPF_JMP) |
850c9265 |
1781 | return -1; |
1782 | |
1783 | if (ops[j].op == OP_POP && ops[j].operand[0].type == OPT_REG |
1784 | && IS(ops[j].operand[0].name, reg)) |
1785 | { |
1786 | found = 1; |
d4e3b5db |
1787 | ops[j].flags |= flag_set; |
850c9265 |
1788 | break; |
1789 | } |
1790 | |
1791 | if (g_labels[j][0] != 0) |
1792 | return -1; |
1793 | } |
1794 | } |
1795 | |
1796 | return found ? 0 : -1; |
1797 | } |
1798 | |
5101a5f9 |
1799 | // is operand 'opr modified' by parsed_op 'po'? |
1800 | static int is_opr_modified(const struct parsed_opr *opr, |
69a3cdfc |
1801 | const struct parsed_op *po) |
1802 | { |
1803 | if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA)) |
1804 | return 0; |
1805 | |
1806 | if (opr->type == OPT_REG && po->operand[0].type == OPT_REG) { |
1807 | if (po->regmask_dst & (1 << opr->reg)) |
1808 | return 1; |
1809 | else |
1810 | return 0; |
1811 | } |
1812 | |
1813 | return IS(po->operand[0].name, opr->name); |
1814 | } |
1815 | |
5101a5f9 |
1816 | // is any operand of parsed_op 'po_test' modified by parsed_op 'po'? |
1817 | static int is_any_opr_modified(const struct parsed_op *po_test, |
1818 | const struct parsed_op *po) |
1819 | { |
1820 | int i; |
1821 | |
1822 | if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA)) |
1823 | return 0; |
1824 | |
1825 | if (po_test->regmask_src & po->regmask_dst) |
1826 | return 1; |
1827 | |
1828 | for (i = 0; i < po_test->operand_cnt; i++) |
1829 | if (IS(po_test->operand[i].name, po->operand[0].name)) |
1830 | return 1; |
1831 | |
1832 | return 0; |
1833 | } |
1834 | |
940e8e66 |
1835 | // scan for any po_test operand modification in range given |
5101a5f9 |
1836 | static int scan_for_mod(struct parsed_op *po_test, int i, int opcnt) |
69a3cdfc |
1837 | { |
1838 | for (; i < opcnt; i++) { |
5101a5f9 |
1839 | if (is_any_opr_modified(po_test, &ops[i])) |
69a3cdfc |
1840 | return i; |
1841 | } |
1842 | |
1843 | return -1; |
1844 | } |
1845 | |
940e8e66 |
1846 | // scan for po_test operand[0] modification in range given |
1847 | static int scan_for_mod_opr0(struct parsed_op *po_test, |
1848 | int i, int opcnt) |
1849 | { |
1850 | for (; i < opcnt; i++) { |
1851 | if (is_opr_modified(&po_test->operand[0], &ops[i])) |
1852 | return i; |
1853 | } |
1854 | |
1855 | return -1; |
1856 | } |
1857 | |
5101a5f9 |
1858 | static int scan_for_flag_set(int i) |
69a3cdfc |
1859 | { |
1860 | for (; i >= 0; i--) { |
1861 | if (ops[i].flags & OPF_FLAGS) |
1862 | return i; |
1863 | |
1864 | if ((ops[i].flags & OPF_JMP) && !(ops[i].flags & OPF_CC)) |
1865 | return -1; |
1866 | if (g_labels[i][0] != 0) |
1867 | return -1; |
1868 | } |
1869 | |
1870 | return -1; |
1871 | } |
1872 | |
5101a5f9 |
1873 | // scan back for cdq, if anything modifies edx, fail |
1874 | static int scan_for_cdq_edx(int i) |
1875 | { |
1876 | for (; i >= 0; i--) { |
1877 | if (ops[i].op == OP_CDQ) |
1878 | return i; |
1879 | |
1880 | if (ops[i].regmask_dst & (1 << xDX)) |
1881 | return -1; |
1882 | if (g_labels[i][0] != 0) |
1883 | return -1; |
1884 | } |
1885 | |
1886 | return -1; |
1887 | } |
1888 | |
64c59faf |
1889 | static int scan_for_reg_clear(int i, int reg) |
1890 | { |
1891 | for (; i >= 0; i--) { |
1892 | if (ops[i].op == OP_XOR |
1893 | && ops[i].operand[0].lmod == OPLM_DWORD |
1894 | && ops[i].operand[0].reg == ops[i].operand[1].reg |
1895 | && ops[i].operand[0].reg == reg) |
1896 | return i; |
1897 | |
1898 | if (ops[i].regmask_dst & (1 << reg)) |
1899 | return -1; |
1900 | if (g_labels[i][0] != 0) |
1901 | return -1; |
1902 | } |
1903 | |
1904 | return -1; |
1905 | } |
1906 | |
1bafb621 |
1907 | // scan for positive, constant esp adjust |
1908 | static int scan_for_esp_adjust(int i, int opcnt, int *adj) |
1909 | { |
7ba45c34 |
1910 | struct parsed_op *po; |
1911 | *adj = 0; |
1912 | |
1bafb621 |
1913 | for (; i < opcnt; i++) { |
7ba45c34 |
1914 | po = &ops[i]; |
1915 | |
1916 | if (po->op == OP_ADD && po->operand[0].reg == xSP) { |
1917 | if (po->operand[1].type != OPT_CONST) |
1bafb621 |
1918 | ferr(&ops[i], "non-const esp adjust?\n"); |
7ba45c34 |
1919 | *adj += po->operand[1].val; |
1bafb621 |
1920 | if (*adj & 3) |
1921 | ferr(&ops[i], "unaligned esp adjust: %x\n", *adj); |
1922 | return i; |
1923 | } |
7ba45c34 |
1924 | else if (po->op == OP_PUSH) |
1925 | *adj -= lmod_bytes(po, po->operand[0].lmod); |
1926 | else if (po->op == OP_POP) |
1927 | *adj += lmod_bytes(po, po->operand[0].lmod); |
1928 | else if ((po->flags & (OPF_JMP|OPF_TAIL)) && po->op != OP_CALL) |
1bafb621 |
1929 | return -1; |
7ba45c34 |
1930 | |
1bafb621 |
1931 | if (g_labels[i][0] != 0) |
1932 | return -1; |
1933 | } |
1934 | |
1935 | return -1; |
1936 | } |
1937 | |
4c45fa73 |
1938 | static void add_label_ref(struct label_ref *lr, int op_i) |
1939 | { |
1940 | struct label_ref *lr_new; |
1941 | |
1942 | if (lr->i == -1) { |
1943 | lr->i = op_i; |
1944 | return; |
1945 | } |
1946 | |
1947 | lr_new = calloc(1, sizeof(*lr_new)); |
1948 | lr_new->i = op_i; |
1949 | lr->next = lr_new; |
1950 | } |
1951 | |
91977a1c |
1952 | static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) |
1953 | { |
69a3cdfc |
1954 | struct parsed_op *po, *delayed_flag_op = NULL, *tmp_op; |
850c9265 |
1955 | struct parsed_opr *last_arith_dst = NULL; |
3ebea2cf |
1956 | char buf1[256], buf2[256], buf3[256], cast[64]; |
940e8e66 |
1957 | struct parsed_proto *pp, *pp_tmp; |
4c45fa73 |
1958 | struct parsed_data *pd; |
91977a1c |
1959 | const char *tmpname; |
940e8e66 |
1960 | enum parsed_flag_op pfo; |
69a3cdfc |
1961 | int save_arg_vars = 0; |
1962 | int cmp_result_vars = 0; |
87bf6cec |
1963 | int need_mul_var = 0; |
91977a1c |
1964 | int had_decl = 0; |
3ebea2cf |
1965 | int label_pending = 0; |
d4e3b5db |
1966 | int regmask_save = 0; |
91977a1c |
1967 | int regmask_arg = 0; |
1968 | int regmask = 0; |
940e8e66 |
1969 | int pfomask = 0; |
64c59faf |
1970 | int found = 0; |
d4e3b5db |
1971 | int depth = 0; |
91977a1c |
1972 | int no_output; |
4c45fa73 |
1973 | int i, j, l; |
69a3cdfc |
1974 | int dummy; |
91977a1c |
1975 | int arg; |
91977a1c |
1976 | int reg; |
1977 | int ret; |
1978 | |
1bafb621 |
1979 | g_bp_frame = g_sp_frame = g_stack_fsz = 0; |
91977a1c |
1980 | |
1981 | ret = proto_parse(fhdr, funcn, &g_func_pp); |
1982 | if (ret) |
1983 | ferr(ops, "proto_parse failed for '%s'\n", funcn); |
1984 | |
3ebea2cf |
1985 | fprintf(fout, "%s %s(", g_func_pp.ret_type.name, funcn); |
91977a1c |
1986 | for (i = 0; i < g_func_pp.argc; i++) { |
1987 | if (i > 0) |
1988 | fprintf(fout, ", "); |
3ebea2cf |
1989 | fprintf(fout, "%s a%d", g_func_pp.arg[i].type.name, i + 1); |
91977a1c |
1990 | } |
4f12f671 |
1991 | if (g_func_pp.is_vararg) { |
1992 | if (i > 0) |
1993 | fprintf(fout, ", "); |
1994 | fprintf(fout, "..."); |
1995 | } |
91977a1c |
1996 | fprintf(fout, ")\n{\n"); |
1997 | |
1998 | // pass1: |
1bafb621 |
1999 | // - handle ebp/esp frame, remove ops related to it |
91977a1c |
2000 | if (ops[0].op == OP_PUSH && IS(opr_name(&ops[0], 0), "ebp") |
2001 | && ops[1].op == OP_MOV |
2002 | && IS(opr_name(&ops[1], 0), "ebp") |
2003 | && IS(opr_name(&ops[1], 1), "esp")) |
2004 | { |
87bf6cec |
2005 | int ecx_push = 0; |
2006 | |
91977a1c |
2007 | g_bp_frame = 1; |
69a3cdfc |
2008 | ops[0].flags |= OPF_RMD; |
2009 | ops[1].flags |= OPF_RMD; |
4c45fa73 |
2010 | i = 2; |
91977a1c |
2011 | |
2012 | if (ops[2].op == OP_SUB && IS(opr_name(&ops[2], 0), "esp")) { |
1bafb621 |
2013 | g_stack_fsz = opr_const(&ops[2], 1); |
69a3cdfc |
2014 | ops[2].flags |= OPF_RMD; |
4c45fa73 |
2015 | i++; |
91977a1c |
2016 | } |
87bf6cec |
2017 | else { |
2018 | // another way msvc builds stack frame.. |
2019 | i = 2; |
2020 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
1bafb621 |
2021 | g_stack_fsz += 4; |
87bf6cec |
2022 | ops[i].flags |= OPF_RMD; |
2023 | ecx_push++; |
2024 | i++; |
2025 | } |
4c45fa73 |
2026 | // and another way.. |
2027 | if (i == 2 && ops[i].op == OP_MOV && ops[i].operand[0].reg == xAX |
2028 | && ops[i].operand[1].type == OPT_CONST |
2029 | && ops[i + 1].op == OP_CALL |
2030 | && IS(opr_name(&ops[i + 1], 0), "__alloca_probe")) |
2031 | { |
2032 | g_stack_fsz += ops[i].operand[1].val; |
2033 | ops[i].flags |= OPF_RMD; |
2034 | i++; |
2035 | ops[i].flags |= OPF_RMD; |
2036 | i++; |
2037 | } |
87bf6cec |
2038 | } |
91977a1c |
2039 | |
64c59faf |
2040 | found = 0; |
91977a1c |
2041 | do { |
2042 | for (; i < opcnt; i++) |
2043 | if (ops[i].op == OP_RET) |
2044 | break; |
64c59faf |
2045 | if (i == opcnt && (ops[i - 1].flags & OPF_JMP) && found) |
2046 | break; |
2047 | |
91977a1c |
2048 | if (ops[i - 1].op != OP_POP || !IS(opr_name(&ops[i - 1], 0), "ebp")) |
2049 | ferr(&ops[i - 1], "'pop ebp' expected\n"); |
69a3cdfc |
2050 | ops[i - 1].flags |= OPF_RMD; |
91977a1c |
2051 | |
1bafb621 |
2052 | if (g_stack_fsz != 0) { |
91977a1c |
2053 | if (ops[i - 2].op != OP_MOV |
2054 | || !IS(opr_name(&ops[i - 2], 0), "esp") |
2055 | || !IS(opr_name(&ops[i - 2], 1), "ebp")) |
2056 | { |
2057 | ferr(&ops[i - 2], "esp restore expected\n"); |
2058 | } |
69a3cdfc |
2059 | ops[i - 2].flags |= OPF_RMD; |
87bf6cec |
2060 | |
2061 | if (ecx_push && ops[i - 3].op == OP_POP |
2062 | && IS(opr_name(&ops[i - 3], 0), "ecx")) |
2063 | { |
2064 | ferr(&ops[i - 3], "unexpected ecx pop\n"); |
2065 | } |
91977a1c |
2066 | } |
87bf6cec |
2067 | |
64c59faf |
2068 | found = 1; |
91977a1c |
2069 | i++; |
2070 | } while (i < opcnt); |
2071 | } |
1bafb621 |
2072 | else { |
2073 | for (i = 0; i < opcnt; i++) { |
2074 | if (ops[i].op == OP_PUSH || (ops[i].flags & (OPF_JMP|OPF_TAIL))) |
2075 | break; |
2076 | if (ops[i].op == OP_SUB && ops[i].operand[0].reg == xSP |
2077 | && ops[i].operand[1].type == OPT_CONST) |
2078 | { |
2079 | g_sp_frame = 1; |
2080 | break; |
2081 | } |
2082 | } |
2083 | |
2084 | if (g_sp_frame) |
2085 | { |
2086 | g_stack_fsz = ops[i].operand[1].val; |
2087 | ops[i].flags |= OPF_RMD; |
2088 | |
2089 | i++; |
2090 | do { |
2091 | for (; i < opcnt; i++) |
2092 | if (ops[i].op == OP_RET) |
2093 | break; |
2094 | if (ops[i - 1].op != OP_ADD |
2095 | || !IS(opr_name(&ops[i - 1], 0), "esp") |
2096 | || ops[i - 1].operand[1].type != OPT_CONST |
2097 | || ops[i - 1].operand[1].val != g_stack_fsz) |
2098 | ferr(&ops[i - 1], "'add esp' expected\n"); |
2099 | ops[i - 1].flags |= OPF_RMD; |
2100 | |
2101 | i++; |
2102 | } while (i < opcnt); |
2103 | } |
2104 | } |
91977a1c |
2105 | |
2106 | // pass2: |
87bf6cec |
2107 | // - resolve all branches |
2108 | for (i = 0; i < opcnt; i++) { |
2109 | po = &ops[i]; |
2110 | po->bt_i = -1; |
4c45fa73 |
2111 | po->btj = NULL; |
87bf6cec |
2112 | |
2113 | if ((po->flags & OPF_RMD) || !(po->flags & OPF_JMP) |
2114 | || po->op == OP_CALL || po->op == OP_RET) |
2115 | continue; |
2116 | |
4c45fa73 |
2117 | if (po->operand[0].type == OPT_REGMEM) { |
2118 | char *p = strchr(po->operand[0].name, '['); |
2119 | if (p == NULL) |
2120 | ferr(po, "unhandled indirect branch\n"); |
2121 | ret = p - po->operand[0].name; |
2122 | strncpy(buf1, po->operand[0].name, ret); |
2123 | buf1[ret] = 0; |
2124 | |
2125 | for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) { |
2126 | if (IS(g_func_pd[j].label, buf1)) { |
2127 | pd = &g_func_pd[j]; |
2128 | break; |
2129 | } |
2130 | } |
2131 | if (pd == NULL) |
2132 | ferr(po, "label '%s' not parsed?\n", buf1); |
2133 | if (pd->type != OPT_OFFSET) |
2134 | ferr(po, "label '%s' with non-offset data?\n", buf1); |
2135 | |
2136 | // find all labels, link |
2137 | for (j = 0; j < pd->count; j++) { |
2138 | for (l = 0; l < opcnt; l++) { |
2139 | if (g_labels[l][0] && IS(g_labels[l], pd->d[j].u.label)) { |
2140 | add_label_ref(&g_label_refs[l], i); |
2141 | pd->d[j].bt_i = l; |
2142 | break; |
2143 | } |
2144 | } |
2145 | } |
2146 | |
2147 | po->btj = pd; |
2148 | continue; |
2149 | } |
2150 | |
2151 | for (l = 0; l < opcnt; l++) { |
2152 | if (g_labels[l][0] && IS(po->operand[0].name, g_labels[l])) { |
2153 | add_label_ref(&g_label_refs[l], i); |
2154 | po->bt_i = l; |
87bf6cec |
2155 | break; |
2156 | } |
2157 | } |
2158 | |
4c45fa73 |
2159 | if (po->bt_i != -1) |
2160 | continue; |
2161 | |
2162 | if (po->operand[0].type == OPT_LABEL) { |
87bf6cec |
2163 | // assume tail call |
2164 | po->op = OP_CALL; |
2165 | po->flags |= OPF_TAIL; |
4c45fa73 |
2166 | continue; |
87bf6cec |
2167 | } |
4c45fa73 |
2168 | |
2169 | ferr(po, "unhandled branch\n"); |
87bf6cec |
2170 | } |
2171 | |
2172 | // pass3: |
91977a1c |
2173 | // - process calls |
1bafb621 |
2174 | for (i = 0; i < opcnt; i++) |
2175 | { |
69a3cdfc |
2176 | po = &ops[i]; |
2177 | if (po->flags & OPF_RMD) |
91977a1c |
2178 | continue; |
850c9265 |
2179 | |
d4e3b5db |
2180 | if (po->op == OP_CALL) |
69a3cdfc |
2181 | { |
1bafb621 |
2182 | pp = calloc(1, sizeof(*pp)); |
91977a1c |
2183 | my_assert_not(pp, NULL); |
1bafb621 |
2184 | tmpname = opr_name(po, 0); |
2185 | if (po->operand[0].type != OPT_LABEL) |
2186 | { |
2187 | ret = scan_for_esp_adjust(i + 1, opcnt, &j); |
2188 | if (ret < 0) |
2189 | ferr(po, "non-__cdecl indirect call unhandled yet\n"); |
2190 | j /= 4; |
2191 | if (j > ARRAY_SIZE(pp->arg)) |
2192 | ferr(po, "esp adjust too large?\n"); |
3ebea2cf |
2193 | pp->ret_type.name = strdup("int"); |
1bafb621 |
2194 | pp->argc = pp->argc_stack = j; |
2195 | for (arg = 0; arg < pp->argc; arg++) |
3ebea2cf |
2196 | pp->arg[arg].type.name = strdup("int"); |
1bafb621 |
2197 | } |
2198 | else { |
2199 | ret = proto_parse(fhdr, tmpname, pp); |
2200 | if (ret) |
2201 | ferr(po, "proto_parse failed for call '%s'\n", tmpname); |
2202 | } |
2203 | |
7ba45c34 |
2204 | // look for and make use of esp adjust |
2205 | ret = -1; |
2206 | if (!pp->is_stdcall) |
2207 | ret = scan_for_esp_adjust(i + 1, opcnt, &j); |
1bafb621 |
2208 | if (ret >= 0) { |
7ba45c34 |
2209 | if (pp->is_vararg) { |
2210 | if (j / 4 < pp->argc_stack) |
2211 | ferr(po, "esp adjust is too small: %x < %x\n", |
2212 | j, pp->argc_stack * 4); |
2213 | // modify pp to make it have varargs as normal args |
2214 | arg = pp->argc; |
2215 | pp->argc += j / 4 - pp->argc_stack; |
2216 | for (; arg < pp->argc; arg++) { |
3ebea2cf |
2217 | pp->arg[arg].type.name = strdup("int"); |
7ba45c34 |
2218 | pp->argc_stack++; |
2219 | } |
2220 | if (pp->argc > ARRAY_SIZE(pp->arg)) |
2221 | ferr(po, "too many args\n"); |
2222 | } |
1bafb621 |
2223 | if (pp->argc_stack != j / 4) |
2224 | ferr(po, "stack tracking failed: %x %x\n", |
7ba45c34 |
2225 | pp->argc_stack * 4, j); |
2226 | |
1bafb621 |
2227 | ops[ret].flags |= OPF_RMD; |
7ba45c34 |
2228 | // a bit of a hack, but deals with use of |
2229 | // single adj for multiple calls |
2230 | ops[ret].operand[1].val -= j; |
1bafb621 |
2231 | } |
7ba45c34 |
2232 | else if (pp->is_vararg) |
2233 | ferr(po, "missing esp_adjust for vararg func '%s'\n", |
2234 | pp->name); |
91977a1c |
2235 | |
39b168b8 |
2236 | // can't call functions with non-__cdecl callbacks yet |
2237 | for (arg = 0; arg < pp->argc; arg++) { |
2238 | if (pp->arg[arg].fptr != NULL) { |
2239 | pp_tmp = pp->arg[arg].fptr; |
2240 | if (pp_tmp->is_stdcall || pp_tmp->argc != pp_tmp->argc_stack) |
2241 | ferr(po, "'%s' has a non-__cdecl callback\n", tmpname); |
2242 | } |
2243 | } |
2244 | |
4c45fa73 |
2245 | // collect all stack args |
91977a1c |
2246 | for (arg = 0; arg < pp->argc; arg++) |
2247 | if (pp->arg[arg].reg == NULL) |
2248 | break; |
2249 | |
1bafb621 |
2250 | for (j = i; j >= 0 && arg < pp->argc; ) |
2251 | { |
2252 | if (g_labels[j][0] != 0) { |
2253 | if (j > 0 && ((ops[j - 1].flags & OPF_TAIL) |
2254 | || (ops[j - 1].flags & (OPF_JMP|OPF_CC)) == OPF_JMP)) |
2255 | { |
2256 | // follow the branch in reverse |
4c45fa73 |
2257 | if (g_label_refs[j].i == -1) |
1bafb621 |
2258 | ferr(po, "no refs for '%s'?\n", g_labels[j]); |
4c45fa73 |
2259 | if (g_label_refs[j].next != NULL) |
2260 | ferr(po, "unhandled multiple refs to '%s'\n", g_labels[j]); |
2261 | j = g_label_refs[j].i + 1; |
1bafb621 |
2262 | continue; |
2263 | } |
2264 | break; |
2265 | } |
2266 | j--; |
2267 | |
2268 | if (ops[j].op == OP_CALL) |
2269 | { |
940e8e66 |
2270 | pp_tmp = ops[j].datap; |
2271 | if (pp_tmp == NULL) |
2272 | ferr(po, "arg collect hit unparsed call\n"); |
2273 | if (pp_tmp->argc_stack > 0) |
2274 | ferr(po, "arg collect hit '%s' with %d stack args\n", |
2275 | opr_name(&ops[j], 0), pp_tmp->argc_stack); |
2276 | } |
2277 | else if ((ops[j].flags & OPF_TAIL) |
2278 | || (ops[j].flags & (OPF_JMP|OPF_CC)) == OPF_JMP) |
2279 | { |
2280 | break; |
69a3cdfc |
2281 | } |
1bafb621 |
2282 | else if (ops[j].op == OP_PUSH) |
2283 | { |
940e8e66 |
2284 | pp->arg[arg].datap = &ops[j]; |
2285 | ret = scan_for_mod(&ops[j], j + 1, i); |
2286 | if (ret >= 0) { |
2287 | // mark this push as one that needs operand saving |
1bafb621 |
2288 | ops[j].flags &= ~OPF_RMD; |
940e8e66 |
2289 | ops[j].argmask |= 1 << arg; |
2290 | save_arg_vars |= 1 << arg; |
2291 | } |
2292 | else |
2293 | ops[j].flags |= OPF_RMD; |
2294 | |
2295 | // next arg |
2296 | for (arg++; arg < pp->argc; arg++) |
2297 | if (pp->arg[arg].reg == NULL) |
2298 | break; |
2299 | } |
91977a1c |
2300 | } |
2301 | if (arg < pp->argc) |
64c59faf |
2302 | ferr(po, "arg collect failed for '%s': %d/%d\n", |
2303 | tmpname, arg, pp->argc); |
69a3cdfc |
2304 | po->datap = pp; |
91977a1c |
2305 | } |
d4e3b5db |
2306 | } |
2307 | |
2308 | // pass4: |
2309 | // - find POPs for PUSHes, rm both |
2310 | // - scan for all used registers |
2311 | // - find flag set ops for their users |
1bafb621 |
2312 | // - declare indirect functions |
d4e3b5db |
2313 | for (i = 0; i < opcnt; i++) { |
2314 | po = &ops[i]; |
2315 | if (po->flags & OPF_RMD) |
2316 | continue; |
2317 | |
2318 | if (po->op == OP_PUSH |
2319 | && po->argmask == 0 && !(po->flags & OPF_RSAVE) |
2320 | && po->operand[0].type == OPT_REG) |
2321 | { |
2322 | reg = po->operand[0].reg; |
2323 | if (reg < 0) |
2324 | ferr(po, "reg not set for push?\n"); |
2325 | |
2326 | depth = 0; |
2327 | ret = scan_for_pop(i + 1, opcnt, |
2328 | po->operand[0].name, i + opcnt, 0, &depth, 0); |
2329 | if (ret == 1) { |
2330 | if (depth > 1) |
2331 | ferr(po, "too much depth: %d\n", depth); |
2332 | if (depth > 0) |
2333 | regmask_save |= 1 << reg; |
2334 | |
2335 | po->flags |= OPF_RMD; |
2336 | scan_for_pop(i + 1, opcnt, po->operand[0].name, |
2337 | i + opcnt * 2, 0, &depth, 1); |
2338 | continue; |
2339 | } |
2340 | ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, 0); |
2341 | if (ret == 0) { |
2342 | arg = OPF_RMD; |
2343 | if (regmask & (1 << reg)) { |
2344 | if (regmask_save & (1 << reg)) |
2345 | ferr(po, "%s already saved?\n", po->operand[0].name); |
2346 | arg = OPF_RSAVE; |
2347 | } |
2348 | po->flags |= arg; |
2349 | scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, arg); |
2350 | continue; |
2351 | } |
2352 | } |
2353 | |
2354 | regmask |= po->regmask_src | po->regmask_dst; |
2355 | |
2356 | if (po->flags & OPF_CC) |
2357 | { |
2358 | ret = scan_for_flag_set(i - 1); |
2359 | if (ret < 0) |
2360 | ferr(po, "unable to trace flag setter\n"); |
2361 | |
2362 | tmp_op = &ops[ret]; // flag setter |
2363 | pfo = split_cond(po, po->op, &dummy); |
2364 | pfomask = 0; |
2365 | |
2366 | // to get nicer code, we try to delay test and cmp; |
2367 | // if we can't because of operand modification, or if we |
2368 | // have math op, make it calculate flags explicitly |
2369 | if (tmp_op->op == OP_TEST || tmp_op->op == OP_CMP) { |
2370 | if (scan_for_mod(tmp_op, ret + 1, i) >= 0) |
2371 | pfomask = 1 << pfo; |
2372 | } |
7ba45c34 |
2373 | else if (tmp_op->op == OP_CMPS) { |
2374 | pfomask = 1 << PFO_Z; |
2375 | } |
d4e3b5db |
2376 | else { |
2377 | if ((pfo != PFO_Z && pfo != PFO_S && pfo != PFO_P) |
2378 | || scan_for_mod_opr0(tmp_op, ret + 1, i) >= 0) |
2379 | pfomask = 1 << pfo; |
2380 | } |
2381 | if (pfomask) { |
2382 | tmp_op->pfomask |= pfomask; |
2383 | cmp_result_vars |= pfomask; |
2384 | po->datap = tmp_op; |
2385 | } |
2386 | |
2387 | if (po->op == OP_ADC || po->op == OP_SBB) |
2388 | cmp_result_vars |= 1 << PFO_C; |
2389 | } |
87bf6cec |
2390 | else if (po->op == OP_MUL |
2391 | || (po->op == OP_IMUL && po->operand_cnt == 1)) |
2392 | { |
2393 | need_mul_var = 1; |
2394 | } |
1bafb621 |
2395 | else if (po->op == OP_CALL && po->operand[0].type != OPT_LABEL) { |
2396 | pp = po->datap; |
2397 | my_assert_not(pp, NULL); |
3ebea2cf |
2398 | fprintf(fout, " %s (*icall%d)(", pp->ret_type.name, i); |
1bafb621 |
2399 | for (j = 0; j < pp->argc; j++) { |
2400 | if (j > 0) |
2401 | fprintf(fout, ", "); |
3ebea2cf |
2402 | fprintf(fout, "%s a%d", pp->arg[j].type.name, j + 1); |
1bafb621 |
2403 | } |
2404 | fprintf(fout, ");\n"); |
2405 | } |
91977a1c |
2406 | } |
2407 | |
4c45fa73 |
2408 | // output LUTs/jumptables |
2409 | for (i = 0; i < g_func_pd_cnt; i++) { |
2410 | pd = &g_func_pd[i]; |
2411 | fprintf(fout, " static const "); |
2412 | if (pd->type == OPT_OFFSET) { |
2413 | fprintf(fout, "void *jt_%s[] =\n { ", pd->label); |
2414 | |
2415 | for (j = 0; j < pd->count; j++) { |
2416 | if (j > 0) |
2417 | fprintf(fout, ", "); |
2418 | fprintf(fout, "&&%s", pd->d[j].u.label); |
2419 | } |
2420 | } |
2421 | else { |
2422 | fprintf(fout, "%s %s[] =\n { ", |
2423 | lmod_type_u(ops, pd->lmod), pd->label); |
2424 | |
2425 | for (j = 0; j < pd->count; j++) { |
2426 | if (j > 0) |
2427 | fprintf(fout, ", "); |
2428 | fprintf(fout, "%u", pd->d[j].u.val); |
2429 | } |
2430 | } |
2431 | fprintf(fout, " };\n"); |
2432 | } |
2433 | |
4f12f671 |
2434 | // declare stack frame, va_arg |
1bafb621 |
2435 | if (g_stack_fsz) |
850c9265 |
2436 | fprintf(fout, " union { u32 d[%d]; u16 w[%d]; u8 b[%d]; } sf;\n", |
1bafb621 |
2437 | (g_stack_fsz + 3) / 4, (g_stack_fsz + 1) / 2, g_stack_fsz); |
850c9265 |
2438 | |
4f12f671 |
2439 | if (g_func_pp.is_vararg) |
2440 | fprintf(fout, " va_list ap;\n"); |
2441 | |
940e8e66 |
2442 | // declare arg-registers |
91977a1c |
2443 | for (i = 0; i < g_func_pp.argc; i++) { |
2444 | if (g_func_pp.arg[i].reg != NULL) { |
2445 | reg = char_array_i(regs_r32, |
2446 | ARRAY_SIZE(regs_r32), g_func_pp.arg[i].reg); |
2447 | if (reg < 0) |
2448 | ferr(ops, "arg '%s' is not a reg?\n", g_func_pp.arg[i].reg); |
2449 | |
2450 | regmask_arg |= 1 << reg; |
2451 | fprintf(fout, " u32 %s = (u32)a%d;\n", |
850c9265 |
2452 | g_func_pp.arg[i].reg, i + 1); |
91977a1c |
2453 | had_decl = 1; |
2454 | } |
2455 | } |
2456 | |
940e8e66 |
2457 | // declare other regs - special case for eax |
3ebea2cf |
2458 | if (!((regmask | regmask_arg) & 1) |
2459 | && !IS(g_func_pp.ret_type.name, "void")) |
2460 | { |
91977a1c |
2461 | fprintf(fout, " u32 eax = 0;\n"); |
2462 | had_decl = 1; |
2463 | } |
2464 | |
2465 | regmask &= ~regmask_arg; |
d4e3b5db |
2466 | regmask &= ~(1 << xSP); |
91977a1c |
2467 | if (g_bp_frame) |
2468 | regmask &= ~(1 << xBP); |
2469 | if (regmask) { |
2470 | for (reg = 0; reg < 8; reg++) { |
2471 | if (regmask & (1 << reg)) { |
2472 | fprintf(fout, " u32 %s;\n", regs_r32[reg]); |
2473 | had_decl = 1; |
2474 | } |
2475 | } |
2476 | } |
2477 | |
d4e3b5db |
2478 | if (regmask_save) { |
2479 | for (reg = 0; reg < 8; reg++) { |
2480 | if (regmask_save & (1 << reg)) { |
2481 | fprintf(fout, " u32 s_%s;\n", regs_r32[reg]); |
2482 | had_decl = 1; |
2483 | } |
2484 | } |
2485 | } |
2486 | |
69a3cdfc |
2487 | if (save_arg_vars) { |
2488 | for (reg = 0; reg < 32; reg++) { |
2489 | if (save_arg_vars & (1 << reg)) { |
2490 | fprintf(fout, " u32 s_a%d;\n", reg + 1); |
2491 | had_decl = 1; |
2492 | } |
2493 | } |
2494 | } |
2495 | |
2496 | if (cmp_result_vars) { |
2497 | for (i = 0; i < 8; i++) { |
2498 | if (cmp_result_vars & (1 << i)) { |
2499 | fprintf(fout, " u32 cond_%s;\n", parsed_flag_op_names[i]); |
2500 | had_decl = 1; |
2501 | } |
2502 | } |
2503 | } |
2504 | |
87bf6cec |
2505 | if (need_mul_var) { |
2506 | fprintf(fout, " u64 mul_tmp;\n"); |
2507 | had_decl = 1; |
2508 | } |
2509 | |
91977a1c |
2510 | if (had_decl) |
2511 | fprintf(fout, "\n"); |
2512 | |
4f12f671 |
2513 | if (g_func_pp.is_vararg) { |
2514 | if (g_func_pp.argc_stack == 0) |
2515 | ferr(ops, "vararg func without stack args?\n"); |
2516 | fprintf(fout, " va_start(ap, a%d);\n", g_func_pp.argc); |
2517 | } |
2518 | |
91977a1c |
2519 | // output ops |
69a3cdfc |
2520 | for (i = 0; i < opcnt; i++) |
2521 | { |
3ebea2cf |
2522 | if (g_labels[i][0] != 0 && g_label_refs[i].i != -1) { |
91977a1c |
2523 | fprintf(fout, "\n%s:\n", g_labels[i]); |
3ebea2cf |
2524 | label_pending = 1; |
2525 | } |
91977a1c |
2526 | |
69a3cdfc |
2527 | po = &ops[i]; |
2528 | if (po->flags & OPF_RMD) |
91977a1c |
2529 | continue; |
2530 | |
2531 | no_output = 0; |
2532 | |
91977a1c |
2533 | #define assert_operand_cnt(n_) \ |
850c9265 |
2534 | if (po->operand_cnt != n_) \ |
2535 | ferr(po, "operand_cnt is %d/%d\n", po->operand_cnt, n_) |
2536 | |
69a3cdfc |
2537 | // conditional/flag using op? |
2538 | if (po->flags & OPF_CC) |
850c9265 |
2539 | { |
940e8e66 |
2540 | int is_delayed = 0; |
2541 | int is_inv = 0; |
69a3cdfc |
2542 | |
940e8e66 |
2543 | pfo = split_cond(po, po->op, &is_inv); |
850c9265 |
2544 | |
69a3cdfc |
2545 | // we go through all this trouble to avoid using parsed_flag_op, |
2546 | // which makes generated code much nicer |
2547 | if (delayed_flag_op != NULL) |
850c9265 |
2548 | { |
940e8e66 |
2549 | out_cmp_test(buf1, sizeof(buf1), delayed_flag_op, pfo, is_inv); |
2550 | is_delayed = 1; |
91977a1c |
2551 | } |
850c9265 |
2552 | else if (last_arith_dst != NULL |
69a3cdfc |
2553 | && (pfo == PFO_Z || pfo == PFO_S || pfo == PFO_P)) |
850c9265 |
2554 | { |
3ebea2cf |
2555 | out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst); |
940e8e66 |
2556 | out_test_for_cc(buf1, sizeof(buf1), po, pfo, is_inv, |
850c9265 |
2557 | last_arith_dst->lmod, buf3); |
940e8e66 |
2558 | is_delayed = 1; |
850c9265 |
2559 | } |
69a3cdfc |
2560 | else if (po->datap != NULL) { |
7ba45c34 |
2561 | // use preprocessed flag calc results |
69a3cdfc |
2562 | tmp_op = po->datap; |
2563 | if (!tmp_op || !(tmp_op->pfomask & (1 << pfo))) |
2564 | ferr(po, "not prepared for pfo %d\n", pfo); |
2565 | |
940e8e66 |
2566 | // note: is_inv was not yet applied |
69a3cdfc |
2567 | snprintf(buf1, sizeof(buf1), "(%scond_%s)", |
940e8e66 |
2568 | is_inv ? "!" : "", parsed_flag_op_names[pfo]); |
69a3cdfc |
2569 | } |
2570 | else { |
2571 | ferr(po, "all methods of finding comparison failed\n"); |
2572 | } |
850c9265 |
2573 | |
69a3cdfc |
2574 | if (po->flags & OPF_JMP) { |
850c9265 |
2575 | fprintf(fout, " if %s\n", buf1); |
2576 | } |
5101a5f9 |
2577 | else if (po->op == OP_ADC || po->op == OP_SBB) { |
940e8e66 |
2578 | if (is_delayed) |
2579 | fprintf(fout, " cond_%s = %s;\n", |
2580 | parsed_flag_op_names[pfo], buf1); |
850c9265 |
2581 | } |
5101a5f9 |
2582 | else if (po->flags & OPF_DATA) { // SETcc |
850c9265 |
2583 | out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]); |
2584 | fprintf(fout, " %s = %s;", buf2, buf1); |
91977a1c |
2585 | } |
69a3cdfc |
2586 | else { |
2587 | ferr(po, "unhandled conditional op\n"); |
2588 | } |
91977a1c |
2589 | } |
2590 | |
940e8e66 |
2591 | pfomask = po->pfomask; |
2592 | |
850c9265 |
2593 | switch (po->op) |
91977a1c |
2594 | { |
2595 | case OP_MOV: |
2596 | assert_operand_cnt(2); |
850c9265 |
2597 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
3ebea2cf |
2598 | fprintf(fout, " %s = %s;", |
850c9265 |
2599 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
2600 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
2601 | po->operand[0].is_ptr ? "(void *)" : "", 0)); |
850c9265 |
2602 | break; |
2603 | |
2604 | case OP_LEA: |
2605 | assert_operand_cnt(2); |
87bf6cec |
2606 | po->operand[1].lmod = OPLM_DWORD; // always |
850c9265 |
2607 | fprintf(fout, " %s = %s;", |
2608 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
2609 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
2610 | NULL, 1)); |
850c9265 |
2611 | break; |
2612 | |
2613 | case OP_MOVZX: |
2614 | assert_operand_cnt(2); |
91977a1c |
2615 | fprintf(fout, " %s = %s;", |
850c9265 |
2616 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
2617 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
850c9265 |
2618 | break; |
2619 | |
2620 | case OP_MOVSX: |
2621 | assert_operand_cnt(2); |
2622 | switch (po->operand[1].lmod) { |
2623 | case OPLM_BYTE: |
2624 | strcpy(buf3, "(s8)"); |
2625 | break; |
2626 | case OPLM_WORD: |
2627 | strcpy(buf3, "(s16)"); |
2628 | break; |
2629 | default: |
2630 | ferr(po, "invalid src lmod: %d\n", po->operand[1].lmod); |
2631 | } |
2632 | fprintf(fout, " %s = %s%s;", |
2633 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
2634 | buf3, |
3ebea2cf |
2635 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
850c9265 |
2636 | break; |
2637 | |
2638 | case OP_NOT: |
2639 | assert_operand_cnt(1); |
2640 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
2641 | fprintf(fout, " %s = ~%s;", buf1, buf1); |
2642 | break; |
2643 | |
5101a5f9 |
2644 | case OP_CDQ: |
2645 | assert_operand_cnt(2); |
2646 | fprintf(fout, " %s = (s32)%s >> 31;", |
2647 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
2648 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
5101a5f9 |
2649 | strcpy(g_comment, "cdq"); |
2650 | break; |
2651 | |
33c35af6 |
2652 | case OP_STOS: |
2653 | // assumes DF=0 |
2654 | assert_operand_cnt(3); |
2655 | if (po->flags & OPF_REP) { |
2656 | fprintf(fout, " for (; ecx != 0; ecx--, edi += %d)\n", |
2657 | lmod_bytes(po, po->operand[0].lmod)); |
d4e3b5db |
2658 | fprintf(fout, " %sedi = eax;", |
2659 | lmod_cast_u_ptr(po, po->operand[0].lmod)); |
33c35af6 |
2660 | strcpy(g_comment, "rep stos"); |
2661 | } |
2662 | else { |
d4e3b5db |
2663 | fprintf(fout, " %sedi = eax; edi += %d;", |
2664 | lmod_cast_u_ptr(po, po->operand[0].lmod), |
33c35af6 |
2665 | lmod_bytes(po, po->operand[0].lmod)); |
2666 | strcpy(g_comment, "stos"); |
2667 | } |
2668 | break; |
2669 | |
d4e3b5db |
2670 | case OP_MOVS: |
2671 | // assumes DF=0 |
2672 | assert_operand_cnt(3); |
2673 | j = lmod_bytes(po, po->operand[0].lmod); |
2674 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
2675 | if (po->flags & OPF_REP) { |
2676 | fprintf(fout, |
2677 | " for (; ecx != 0; ecx--, edi += %d, esi += %d)\n", |
2678 | j, j); |
2679 | fprintf(fout, |
2680 | " %sedi = %sesi;", buf1, buf1); |
2681 | strcpy(g_comment, "rep movs"); |
2682 | } |
2683 | else { |
2684 | fprintf(fout, " %sedi = %sesi; edi += %d; esi += %d;", |
2685 | buf1, buf1, j, j); |
2686 | strcpy(g_comment, "movs"); |
2687 | } |
2688 | break; |
2689 | |
7ba45c34 |
2690 | case OP_CMPS: |
2691 | // assumes DF=0 |
2692 | // repe ~ repeat while ZF=1 |
2693 | assert_operand_cnt(3); |
2694 | j = lmod_bytes(po, po->operand[0].lmod); |
2695 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
2696 | if (po->flags & OPF_REP) { |
2697 | fprintf(fout, |
2698 | " for (; ecx != 0; ecx--, edi += %d, esi += %d)\n", |
2699 | j, j); |
2700 | fprintf(fout, |
2701 | " if ((cond_z = (%sedi == %sesi)) %s 0)\n", |
2702 | buf1, buf1, (po->flags & OPF_REPZ) ? "==" : "!="); |
2703 | fprintf(fout, |
2704 | " break;"); |
2705 | snprintf(g_comment, sizeof(g_comment), "rep%s cmps", |
2706 | (po->flags & OPF_REPZ) ? "e" : "ne"); |
2707 | } |
2708 | else { |
2709 | fprintf(fout, |
2710 | " cond_z = (%sedi = %sesi); edi += %d; esi += %d;", |
2711 | buf1, buf1, j, j); |
2712 | strcpy(g_comment, "cmps"); |
2713 | } |
2714 | pfomask &= ~(1 << PFO_Z); |
2715 | last_arith_dst = NULL; |
2716 | delayed_flag_op = NULL; |
2717 | break; |
2718 | |
850c9265 |
2719 | // arithmetic w/flags |
2720 | case OP_ADD: |
2721 | case OP_SUB: |
2722 | case OP_AND: |
2723 | case OP_OR: |
5101a5f9 |
2724 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
2725 | // fallthrough |
850c9265 |
2726 | case OP_SHL: |
2727 | case OP_SHR: |
2728 | dualop_arith: |
2729 | assert_operand_cnt(2); |
850c9265 |
2730 | fprintf(fout, " %s %s= %s;", |
2731 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
2732 | op_to_c(po), |
3ebea2cf |
2733 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
850c9265 |
2734 | last_arith_dst = &po->operand[0]; |
69a3cdfc |
2735 | delayed_flag_op = NULL; |
850c9265 |
2736 | break; |
2737 | |
d4e3b5db |
2738 | case OP_SAR: |
2739 | assert_operand_cnt(2); |
2740 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
2741 | fprintf(fout, " %s = %s%s >> %s;", buf1, |
2742 | lmod_cast_s(po, po->operand[0].lmod), buf1, |
3ebea2cf |
2743 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
d4e3b5db |
2744 | last_arith_dst = &po->operand[0]; |
2745 | delayed_flag_op = NULL; |
2746 | break; |
2747 | |
2748 | case OP_ROL: |
2749 | case OP_ROR: |
2750 | assert_operand_cnt(2); |
2751 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
2752 | if (po->operand[1].type == OPT_CONST) { |
2753 | j = po->operand[1].val; |
2754 | j %= lmod_bytes(po, po->operand[0].lmod) * 8; |
2755 | fprintf(fout, po->op == OP_ROL ? |
2756 | " %s = (%s << %d) | (%s >> %d);" : |
2757 | " %s = (%s >> %d) | (%s << %d);", |
2758 | buf1, buf1, j, buf1, |
2759 | lmod_bytes(po, po->operand[0].lmod) * 8 - j); |
2760 | } |
2761 | else |
2762 | ferr(po, "TODO\n"); |
2763 | last_arith_dst = &po->operand[0]; |
2764 | delayed_flag_op = NULL; |
2765 | break; |
2766 | |
5101a5f9 |
2767 | case OP_XOR: |
850c9265 |
2768 | assert_operand_cnt(2); |
2769 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
5101a5f9 |
2770 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
2771 | // special case for XOR |
2772 | fprintf(fout, " %s = 0;", |
2773 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
2774 | last_arith_dst = &po->operand[0]; |
2775 | delayed_flag_op = NULL; |
850c9265 |
2776 | break; |
850c9265 |
2777 | } |
5101a5f9 |
2778 | goto dualop_arith; |
2779 | |
5101a5f9 |
2780 | case OP_ADC: |
850c9265 |
2781 | case OP_SBB: |
5101a5f9 |
2782 | assert_operand_cnt(2); |
2783 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
2784 | fprintf(fout, " %s %s= %s + cond_c;", |
2785 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
2786 | op_to_c(po), |
3ebea2cf |
2787 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
5101a5f9 |
2788 | last_arith_dst = &po->operand[0]; |
2789 | delayed_flag_op = NULL; |
850c9265 |
2790 | break; |
2791 | |
2792 | case OP_INC: |
2793 | case OP_DEC: |
2794 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
1bafb621 |
2795 | if (po->operand[0].type == OPT_REG) { |
2796 | strcpy(buf2, po->op == OP_INC ? "++" : "--"); |
2797 | fprintf(fout, " %s%s;", buf1, buf2); |
2798 | } |
2799 | else { |
2800 | strcpy(buf2, po->op == OP_INC ? "+" : "-"); |
2801 | fprintf(fout, " %s %s= 1;", buf1, buf2); |
2802 | } |
5101a5f9 |
2803 | last_arith_dst = &po->operand[0]; |
2804 | delayed_flag_op = NULL; |
2805 | break; |
2806 | |
2807 | case OP_NEG: |
2808 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
3ebea2cf |
2809 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]); |
5101a5f9 |
2810 | fprintf(fout, " %s = -%s%s;", buf1, |
2811 | lmod_cast_s(po, po->operand[0].lmod), buf2); |
850c9265 |
2812 | last_arith_dst = &po->operand[0]; |
69a3cdfc |
2813 | delayed_flag_op = NULL; |
940e8e66 |
2814 | if (pfomask & (1 << PFO_C)) { |
2815 | fprintf(fout, "\n cond_c = (%s != 0);", buf1); |
2816 | pfomask &= ~(1 << PFO_C); |
2817 | } |
850c9265 |
2818 | break; |
2819 | |
2820 | case OP_IMUL: |
2821 | if (po->operand_cnt == 2) |
2822 | goto dualop_arith; |
87bf6cec |
2823 | if (po->operand_cnt == 3) |
2824 | ferr(po, "TODO imul3\n"); |
2825 | // fallthrough |
2826 | case OP_MUL: |
2827 | assert_operand_cnt(1); |
2828 | strcpy(buf1, po->op == OP_IMUL ? "(s64)(s32)" : "(u64)"); |
2829 | fprintf(fout, " mul_tmp = %seax * %s%s;\n", buf1, buf1, |
3ebea2cf |
2830 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0])); |
87bf6cec |
2831 | fprintf(fout, " edx = mul_tmp >> 32;\n"); |
2832 | fprintf(fout, " eax = mul_tmp;"); |
2833 | last_arith_dst = NULL; |
69a3cdfc |
2834 | delayed_flag_op = NULL; |
91977a1c |
2835 | break; |
2836 | |
5101a5f9 |
2837 | case OP_DIV: |
2838 | case OP_IDIV: |
2839 | assert_operand_cnt(1); |
2840 | if (po->operand[0].lmod != OPLM_DWORD) |
2841 | ferr(po, "unhandled lmod %d\n", po->operand[0].lmod); |
2842 | |
2843 | // 32bit division is common, look for it |
64c59faf |
2844 | if (po->op == OP_DIV) |
2845 | ret = scan_for_reg_clear(i - 1, xDX); |
2846 | else |
2847 | ret = scan_for_cdq_edx(i - 1); |
2848 | if (ret >= 0) { |
3ebea2cf |
2849 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
5101a5f9 |
2850 | strcpy(buf2, lmod_cast(po, po->operand[0].lmod, |
2851 | po->op == OP_IDIV)); |
2852 | fprintf(fout, " edx = %seax %% %s%s;\n", buf2, buf2, buf1); |
2853 | fprintf(fout, " eax = %seax / %s%s;", buf2, buf2, buf1); |
2854 | } |
2855 | else |
2856 | ferr(po, "TODO 64bit divident\n"); |
87bf6cec |
2857 | last_arith_dst = NULL; |
2858 | delayed_flag_op = NULL; |
5101a5f9 |
2859 | break; |
2860 | |
91977a1c |
2861 | case OP_TEST: |
2862 | case OP_CMP: |
850c9265 |
2863 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
940e8e66 |
2864 | if (pfomask != 0) { |
69a3cdfc |
2865 | for (j = 0; j < 8; j++) { |
940e8e66 |
2866 | if (pfomask & (1 << j)) { |
69a3cdfc |
2867 | out_cmp_test(buf1, sizeof(buf1), po, j, 0); |
2868 | fprintf(fout, " cond_%s = %s;", |
2869 | parsed_flag_op_names[j], buf1); |
2870 | } |
2871 | } |
940e8e66 |
2872 | pfomask = 0; |
69a3cdfc |
2873 | } |
2874 | else |
2875 | no_output = 1; |
7ba45c34 |
2876 | last_arith_dst = NULL; |
69a3cdfc |
2877 | delayed_flag_op = po; |
91977a1c |
2878 | break; |
2879 | |
69a3cdfc |
2880 | // note: we reuse OP_Jcc for SETcc, only flags differ |
91977a1c |
2881 | case OP_JO ... OP_JG: |
5101a5f9 |
2882 | if (po->flags & OPF_JMP) |
850c9265 |
2883 | fprintf(fout, " goto %s;", po->operand[0].name); |
5101a5f9 |
2884 | // else SETcc - should already be handled |
850c9265 |
2885 | break; |
2886 | |
2887 | case OP_JMP: |
87bf6cec |
2888 | assert_operand_cnt(1); |
4c45fa73 |
2889 | if (po->operand[0].type == OPT_REGMEM) { |
2890 | ret = sscanf(po->operand[0].name, "%[^[][%[^*]*4]", |
2891 | buf1, buf2); |
2892 | if (ret != 2) |
2893 | ferr(po, "parse failure for jmp '%s'\n", |
2894 | po->operand[0].name); |
2895 | fprintf(fout, " goto *jt_%s[%s];", buf1, buf2); |
2896 | break; |
2897 | } |
2898 | else if (po->operand[0].type != OPT_LABEL) |
2899 | ferr(po, "unhandled jmp type\n"); |
87bf6cec |
2900 | |
850c9265 |
2901 | fprintf(fout, " goto %s;", po->operand[0].name); |
91977a1c |
2902 | break; |
2903 | |
2904 | case OP_CALL: |
5101a5f9 |
2905 | assert_operand_cnt(1); |
850c9265 |
2906 | pp = po->datap; |
91977a1c |
2907 | if (pp == NULL) |
850c9265 |
2908 | ferr(po, "NULL pp\n"); |
91977a1c |
2909 | |
1bafb621 |
2910 | if (po->operand[0].type != OPT_LABEL) |
2911 | fprintf(fout, " icall%d = (void *)%s;\n", i, |
3ebea2cf |
2912 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0])); |
1bafb621 |
2913 | |
91977a1c |
2914 | fprintf(fout, " "); |
3ebea2cf |
2915 | if (!IS(pp->ret_type.name, "void")) { |
87bf6cec |
2916 | if (po->flags & OPF_TAIL) |
2917 | fprintf(fout, "return "); |
2918 | else |
2919 | fprintf(fout, "eax = "); |
3ebea2cf |
2920 | if (pp->ret_type.is_ptr) |
91977a1c |
2921 | fprintf(fout, "(u32)"); |
2922 | } |
87bf6cec |
2923 | |
39b168b8 |
2924 | if (po->operand[0].type != OPT_LABEL) { |
1bafb621 |
2925 | fprintf(fout, "icall%d(", i); |
39b168b8 |
2926 | } |
2927 | else { |
2928 | if (pp->name[0] == 0) |
2929 | ferr(po, "missing pp->name\n"); |
2930 | fprintf(fout, "%s(", pp->name); |
2931 | } |
2932 | |
91977a1c |
2933 | for (arg = 0; arg < pp->argc; arg++) { |
2934 | if (arg > 0) |
2935 | fprintf(fout, ", "); |
87bf6cec |
2936 | |
3ebea2cf |
2937 | cast[0] = 0; |
2938 | if (pp->arg[arg].type.is_ptr) |
2939 | snprintf(cast, sizeof(cast), "(%s)", pp->arg[arg].type.name); |
87bf6cec |
2940 | |
91977a1c |
2941 | if (pp->arg[arg].reg != NULL) { |
3ebea2cf |
2942 | fprintf(fout, "%s%s", cast, pp->arg[arg].reg); |
91977a1c |
2943 | continue; |
2944 | } |
2945 | |
2946 | // stack arg |
2947 | tmp_op = pp->arg[arg].datap; |
2948 | if (tmp_op == NULL) |
850c9265 |
2949 | ferr(po, "parsed_op missing for arg%d\n", arg); |
940e8e66 |
2950 | if (tmp_op->argmask) { |
3ebea2cf |
2951 | fprintf(fout, "%ss_a%d", cast, arg + 1); |
69a3cdfc |
2952 | } |
2953 | else { |
2954 | fprintf(fout, "%s", |
2955 | out_src_opr(buf1, sizeof(buf1), |
3ebea2cf |
2956 | tmp_op, &tmp_op->operand[0], cast, 0)); |
69a3cdfc |
2957 | } |
91977a1c |
2958 | } |
2959 | fprintf(fout, ");"); |
87bf6cec |
2960 | |
2961 | if (po->flags & OPF_TAIL) { |
2962 | strcpy(g_comment, "tailcall"); |
3ebea2cf |
2963 | if (IS(pp->ret_type.name, "void")) { |
87bf6cec |
2964 | fprintf(fout, "\n return;"); |
3ebea2cf |
2965 | strcpy(g_comment, "^ tailcall"); |
2966 | } |
87bf6cec |
2967 | } |
2968 | delayed_flag_op = NULL; |
2969 | last_arith_dst = NULL; |
91977a1c |
2970 | break; |
2971 | |
2972 | case OP_RET: |
4f12f671 |
2973 | if (g_func_pp.is_vararg) |
2974 | fprintf(fout, " va_end(ap);\n"); |
2975 | |
3ebea2cf |
2976 | if (IS(g_func_pp.ret_type.name, "void")) { |
2977 | if (i != opcnt - 1 || label_pending) |
2978 | fprintf(fout, " return;"); |
2979 | } |
2980 | else if (g_func_pp.ret_type.is_ptr) { |
d4e3b5db |
2981 | fprintf(fout, " return (%s)eax;", |
3ebea2cf |
2982 | g_func_pp.ret_type.name); |
2983 | } |
91977a1c |
2984 | else |
2985 | fprintf(fout, " return eax;"); |
2986 | break; |
2987 | |
2988 | case OP_PUSH: |
940e8e66 |
2989 | if (po->argmask) { |
69a3cdfc |
2990 | // special case - saved func arg |
3ebea2cf |
2991 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
940e8e66 |
2992 | for (j = 0; j < 32; j++) { |
d4e3b5db |
2993 | if (po->argmask & (1 << j)) |
2994 | fprintf(fout, " s_a%d = %s;", j + 1, buf1); |
940e8e66 |
2995 | } |
69a3cdfc |
2996 | break; |
2997 | } |
d4e3b5db |
2998 | else if (po->flags & OPF_RSAVE) { |
3ebea2cf |
2999 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
d4e3b5db |
3000 | fprintf(fout, " s_%s = %s;", buf1, buf1); |
3001 | break; |
3002 | } |
3003 | ferr(po, "stray push encountered\n"); |
91977a1c |
3004 | break; |
3005 | |
3006 | case OP_POP: |
d4e3b5db |
3007 | if (po->flags & OPF_RSAVE) { |
3ebea2cf |
3008 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
d4e3b5db |
3009 | fprintf(fout, " %s = s_%s;", buf1, buf1); |
3010 | break; |
3011 | } |
3012 | ferr(po, "stray pop encountered\n"); |
91977a1c |
3013 | break; |
3014 | |
33c35af6 |
3015 | case OP_NOP: |
3016 | break; |
3017 | |
91977a1c |
3018 | default: |
3019 | no_output = 1; |
69a3cdfc |
3020 | ferr(po, "unhandled op type %d, flags %x\n", |
3021 | po->op, po->flags); |
91977a1c |
3022 | break; |
3023 | } |
3024 | |
7ba45c34 |
3025 | // some sanity checking |
3026 | if ((po->flags & OPF_REP) && po->op != OP_STOS |
3027 | && po->op != OP_MOVS && po->op != OP_CMPS) |
3028 | ferr(po, "unexpected rep\n"); |
3029 | if ((po->flags & (OPF_REPZ|OPF_REPNZ)) && po->op != OP_CMPS) |
3030 | ferr(po, "unexpected repz/repnz\n"); |
3031 | |
91977a1c |
3032 | if (g_comment[0] != 0) { |
3033 | fprintf(fout, " // %s", g_comment); |
3034 | g_comment[0] = 0; |
3035 | no_output = 0; |
3036 | } |
3037 | if (!no_output) |
3038 | fprintf(fout, "\n"); |
5101a5f9 |
3039 | |
940e8e66 |
3040 | if (pfomask != 0) |
7ba45c34 |
3041 | ferr(po, "missed flag calc, pfomask=%x\n", pfomask); |
940e8e66 |
3042 | |
5101a5f9 |
3043 | // see is delayed flag stuff is still valid |
3044 | if (delayed_flag_op != NULL && delayed_flag_op != po) { |
3045 | if (is_any_opr_modified(delayed_flag_op, po)) |
3046 | delayed_flag_op = NULL; |
3047 | } |
3048 | |
3049 | if (last_arith_dst != NULL && last_arith_dst != &po->operand[0]) { |
3050 | if (is_opr_modified(last_arith_dst, po)) |
3051 | last_arith_dst = NULL; |
3052 | } |
3ebea2cf |
3053 | |
3054 | label_pending = 0; |
91977a1c |
3055 | } |
3056 | |
3057 | fprintf(fout, "}\n\n"); |
3058 | |
3059 | // cleanup |
3060 | for (i = 0; i < opcnt; i++) { |
4c45fa73 |
3061 | struct label_ref *lr, *lr_del; |
3062 | |
3063 | lr = g_label_refs[i].next; |
3064 | while (lr != NULL) { |
3065 | lr_del = lr; |
3066 | lr = lr->next; |
3067 | free(lr_del); |
3068 | } |
3069 | g_label_refs[i].i = -1; |
3070 | g_label_refs[i].next = NULL; |
3071 | |
91977a1c |
3072 | if (ops[i].op == OP_CALL) { |
3073 | pp = ops[i].datap; |
3074 | if (pp) { |
3075 | proto_release(pp); |
3076 | free(pp); |
3077 | } |
3078 | } |
3079 | } |
3080 | proto_release(&g_func_pp); |
3081 | } |
c36e914d |
3082 | |
d4e3b5db |
3083 | static void set_label(int i, const char *name) |
3084 | { |
3085 | const char *p; |
3086 | int len; |
3087 | |
3088 | len = strlen(name); |
3089 | p = strchr(name, ':'); |
3090 | if (p != NULL) |
3091 | len = p - name; |
3092 | |
3093 | if (len > sizeof(g_labels[0]) - 1) |
3094 | aerr("label '%s' too long: %d\n", name, len); |
3095 | if (g_labels[i][0] != 0) |
3096 | aerr("dupe label '%s'?\n", name); |
3097 | memcpy(g_labels[i], name, len); |
3098 | g_labels[i][len] = 0; |
3099 | } |
3100 | |
bfa4a6ee |
3101 | // '=' needs special treatment.. |
3102 | static char *next_word_s(char *w, size_t wsize, char *s) |
3103 | { |
3104 | size_t i; |
3105 | |
3106 | s = sskip(s); |
3107 | |
3108 | for (i = 0; i < wsize - 1; i++) { |
3109 | if (s[i] == 0 || my_isblank(s[i]) || (s[i] == '=' && i > 0)) |
3110 | break; |
3111 | w[i] = s[i]; |
3112 | } |
3113 | w[i] = 0; |
3114 | |
3115 | if (s[i] != 0 && !my_isblank(s[i]) && s[i] != '=') |
3116 | printf("warning: '%s' truncated\n", w); |
3117 | |
3118 | return s + i; |
3119 | } |
3120 | |
3121 | static int cmpstringp(const void *p1, const void *p2) |
3122 | { |
3123 | return strcmp(*(char * const *)p1, *(char * const *)p2); |
3124 | } |
3125 | |
91977a1c |
3126 | int main(int argc, char *argv[]) |
3127 | { |
06c5d854 |
3128 | FILE *fout, *fasm, *frlist; |
4c45fa73 |
3129 | struct parsed_data *pd = NULL; |
3130 | int pd_alloc = 0; |
3131 | char **rlist = NULL; |
3132 | int rlist_len = 0; |
3133 | int rlist_alloc = 0; |
91977a1c |
3134 | char line[256]; |
3135 | char words[16][256]; |
4c45fa73 |
3136 | enum opr_lenmod lmod; |
91977a1c |
3137 | int in_func = 0; |
4c45fa73 |
3138 | int pending_endp = 0; |
bfa4a6ee |
3139 | int skip_func = 0; |
940e8e66 |
3140 | int skip_warned = 0; |
91977a1c |
3141 | int eq_alloc; |
bfa4a6ee |
3142 | int verbose = 0; |
3143 | int arg_out; |
3144 | int arg = 1; |
91977a1c |
3145 | int pi = 0; |
4c45fa73 |
3146 | int i, j, len; |
91977a1c |
3147 | char *p; |
3148 | int wordc; |
3149 | |
bfa4a6ee |
3150 | if (argv[1] && IS(argv[1], "-v")) { |
3151 | verbose = 1; |
3152 | arg++; |
3153 | } |
3154 | |
3155 | if (argc < arg + 3) { |
3156 | printf("usage:\n%s [-v] <.c> <.asm> <hdrf> [rlist]*\n", |
91977a1c |
3157 | argv[0]); |
3158 | return 1; |
3159 | } |
3160 | |
bfa4a6ee |
3161 | arg_out = arg++; |
91977a1c |
3162 | |
bfa4a6ee |
3163 | asmfn = argv[arg++]; |
91977a1c |
3164 | fasm = fopen(asmfn, "r"); |
3165 | my_assert_not(fasm, NULL); |
3166 | |
bfa4a6ee |
3167 | hdrfn = argv[arg++]; |
06c5d854 |
3168 | g_fhdr = fopen(hdrfn, "r"); |
3169 | my_assert_not(g_fhdr, NULL); |
bfa4a6ee |
3170 | |
3171 | rlist_alloc = 64; |
3172 | rlist = malloc(rlist_alloc * sizeof(rlist[0])); |
3173 | my_assert_not(rlist, NULL); |
3174 | // needs special handling.. |
3175 | rlist[rlist_len++] = "__alloca_probe"; |
3176 | |
3177 | for (; arg < argc; arg++) { |
3178 | frlist = fopen(argv[arg], "r"); |
3179 | my_assert_not(frlist, NULL); |
3180 | |
3181 | while (fgets(line, sizeof(line), frlist)) { |
3182 | p = sskip(line); |
3183 | if (*p == 0 || *p == ';' || *p == '#') |
3184 | continue; |
3185 | |
3186 | p = next_word(words[0], sizeof(words[0]), p); |
3187 | if (words[0][0] == 0) |
3188 | continue; |
3189 | |
3190 | if (rlist_len >= rlist_alloc) { |
3191 | rlist_alloc = rlist_alloc * 2 + 64; |
3192 | rlist = realloc(rlist, rlist_alloc * sizeof(rlist[0])); |
3193 | my_assert_not(rlist, NULL); |
3194 | } |
3195 | rlist[rlist_len++] = strdup(words[0]); |
3196 | } |
3197 | |
3198 | fclose(frlist); |
3199 | frlist = NULL; |
3200 | } |
3201 | |
3202 | if (rlist_len > 0) |
3203 | qsort(rlist, rlist_len, sizeof(rlist[0]), cmpstringp); |
3204 | |
3205 | fout = fopen(argv[arg_out], "w"); |
91977a1c |
3206 | my_assert_not(fout, NULL); |
3207 | |
3208 | eq_alloc = 128; |
3209 | g_eqs = malloc(eq_alloc * sizeof(g_eqs[0])); |
3210 | my_assert_not(g_eqs, NULL); |
3211 | |
4c45fa73 |
3212 | for (i = 0; i < ARRAY_SIZE(g_label_refs); i++) { |
3213 | g_label_refs[i].i = -1; |
3214 | g_label_refs[i].next = NULL; |
3215 | } |
3216 | |
91977a1c |
3217 | while (fgets(line, sizeof(line), fasm)) |
3218 | { |
4c45fa73 |
3219 | wordc = 0; |
91977a1c |
3220 | asmln++; |
3221 | |
3222 | p = sskip(line); |
1bafb621 |
3223 | if (*p == 0) |
91977a1c |
3224 | continue; |
3225 | |
1bafb621 |
3226 | if (*p == ';') { |
3227 | static const char *attrs[] = { |
3228 | "bp-based frame", |
3229 | "library function", |
3230 | "static", |
3231 | "noreturn", |
3232 | "thunk", |
3233 | "fpd=", |
3234 | }; |
4c45fa73 |
3235 | if (p[2] == '=' && IS_START(p, "; =============== S U B")) |
3236 | goto do_pending_endp; // eww.. |
3237 | |
3238 | if (p[2] != 'A' || !IS_START(p, "; Attributes:")) |
1bafb621 |
3239 | continue; |
3240 | |
3241 | // parse IDA's attribute-list comment |
4c45fa73 |
3242 | g_ida_func_attr = 0; |
1bafb621 |
3243 | p = sskip(p + 13); |
3244 | // get rid of random tabs |
3245 | for (i = 0; p[i] != 0; i++) |
3246 | if (p[i] == '\t') |
3247 | p[i] = ' '; |
3248 | |
3249 | for (; *p != 0; p = sskip(p)) { |
3250 | for (i = 0; i < ARRAY_SIZE(attrs); i++) { |
3251 | if (!strncmp(p, attrs[i], strlen(attrs[i]))) { |
4c45fa73 |
3252 | g_ida_func_attr |= 1 << i; |
1bafb621 |
3253 | p += strlen(attrs[i]); |
3254 | break; |
3255 | } |
3256 | } |
3257 | if (i == ARRAY_SIZE(attrs)) { |
3258 | anote("unparsed IDA attr: %s\n", p); |
3259 | break; |
3260 | } |
3261 | if (IS(attrs[i], "fpd=")) { |
3262 | p = next_word(words[0], sizeof(words[0]), p); |
3263 | // ignore for now.. |
3264 | } |
3265 | } |
3266 | continue; |
3267 | } |
3268 | |
06c5d854 |
3269 | parse_words: |
91977a1c |
3270 | memset(words, 0, sizeof(words)); |
3271 | for (wordc = 0; wordc < 16; wordc++) { |
bfa4a6ee |
3272 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
91977a1c |
3273 | if (*p == 0 || *p == ';') { |
3274 | wordc++; |
3275 | break; |
3276 | } |
3277 | } |
3278 | |
06c5d854 |
3279 | // alow asm patches in comments |
3ebea2cf |
3280 | if (*p == ';' && IS_START(p, "; sctpatch:")) { |
3281 | p = sskip(p + 11); |
06c5d854 |
3282 | if (*p == 0 || *p == ';') |
3283 | continue; |
3284 | goto parse_words; // lame |
3285 | } |
3286 | |
91977a1c |
3287 | if (wordc == 0) { |
3288 | // shouldn't happen |
3289 | awarn("wordc == 0?\n"); |
3290 | continue; |
3291 | } |
3292 | |
3293 | // don't care about this: |
3294 | if (words[0][0] == '.' |
3295 | || IS(words[0], "include") |
3296 | || IS(words[0], "assume") || IS(words[1], "segment") |
3297 | || IS(words[0], "align")) |
3298 | { |
3299 | continue; |
3300 | } |
3301 | |
4c45fa73 |
3302 | do_pending_endp: |
3303 | // do delayed endp processing to collect switch jumptables |
3304 | if (pending_endp) { |
3305 | if (in_func && !skip_func && wordc >= 2 |
3306 | && ((words[0][0] == 'd' && words[0][2] == 0) |
3307 | || (words[1][0] == 'd' && words[1][2] == 0))) |
3308 | { |
3309 | i = 1; |
3310 | if (words[1][0] == 'd' && words[1][2] == 0) { |
3311 | // label |
3312 | if (g_func_pd_cnt >= pd_alloc) { |
3313 | pd_alloc = pd_alloc * 2 + 16; |
3314 | g_func_pd = realloc(g_func_pd, |
3315 | sizeof(g_func_pd[0]) * pd_alloc); |
3316 | my_assert_not(g_func_pd, NULL); |
3317 | } |
3318 | pd = &g_func_pd[g_func_pd_cnt]; |
3319 | g_func_pd_cnt++; |
3320 | memset(pd, 0, sizeof(*pd)); |
3321 | strcpy(pd->label, words[0]); |
3322 | pd->type = OPT_CONST; |
3323 | pd->lmod = lmod_from_directive(words[1]); |
3324 | i = 2; |
3325 | } |
3326 | else { |
3327 | lmod = lmod_from_directive(words[0]); |
3328 | if (lmod != pd->lmod) |
3329 | aerr("lmod change? %d->%d\n", pd->lmod, lmod); |
3330 | } |
3331 | |
3332 | if (pd->count_alloc < pd->count + wordc) { |
3333 | pd->count_alloc = pd->count_alloc * 2 + 14 + wordc; |
3334 | pd->d = realloc(pd->d, sizeof(pd->d[0]) * pd->count_alloc); |
3335 | my_assert_not(pd->d, NULL); |
3336 | } |
3337 | for (; i < wordc; i++) { |
3338 | if (IS(words[i], "offset")) { |
3339 | pd->type = OPT_OFFSET; |
3340 | i++; |
3341 | } |
3342 | p = strchr(words[i], ','); |
3343 | if (p != NULL) |
3344 | *p = 0; |
3345 | if (pd->type == OPT_OFFSET) |
3346 | pd->d[pd->count].u.label = strdup(words[i]); |
3347 | else |
3348 | pd->d[pd->count].u.val = parse_number(words[i]); |
3349 | pd->d[pd->count].bt_i = -1; |
3350 | pd->count++; |
3351 | } |
3352 | continue; |
3353 | } |
3354 | |
3355 | if (in_func && !skip_func) |
3356 | gen_func(fout, g_fhdr, g_func, pi); |
3357 | |
3358 | pending_endp = 0; |
3359 | in_func = 0; |
3360 | g_ida_func_attr = 0; |
3361 | skip_warned = 0; |
3362 | skip_func = 0; |
3363 | g_func[0] = 0; |
3364 | if (pi != 0) { |
3365 | memset(&ops, 0, pi * sizeof(ops[0])); |
3366 | memset(g_labels, 0, pi * sizeof(g_labels[0])); |
3367 | pi = 0; |
3368 | } |
3369 | g_eqcnt = 0; |
3370 | for (i = 0; i < g_func_pd_cnt; i++) { |
3371 | pd = &g_func_pd[i]; |
3372 | if (pd->type == OPT_OFFSET) { |
3373 | for (j = 0; j < pd->count; j++) |
3374 | free(pd->d[j].u.label); |
3375 | } |
3376 | free(pd->d); |
3377 | pd->d = NULL; |
3378 | } |
3379 | g_func_pd_cnt = 0; |
3380 | pd = NULL; |
3381 | if (wordc == 0) |
3382 | continue; |
3383 | } |
3384 | |
91977a1c |
3385 | if (IS(words[1], "proc")) { |
3386 | if (in_func) |
3387 | aerr("proc '%s' while in_func '%s'?\n", |
3388 | words[0], g_func); |
bfa4a6ee |
3389 | p = words[0]; |
4c45fa73 |
3390 | if ((g_ida_func_attr & IDAFA_THUNK) |
1bafb621 |
3391 | || bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp)) |
bfa4a6ee |
3392 | skip_func = 1; |
91977a1c |
3393 | strcpy(g_func, words[0]); |
d4e3b5db |
3394 | set_label(0, words[0]); |
91977a1c |
3395 | in_func = 1; |
3396 | continue; |
3397 | } |
3398 | |
3399 | if (IS(words[1], "endp")) { |
3400 | if (!in_func) |
3401 | aerr("endp '%s' while not in_func?\n", words[0]); |
3402 | if (!IS(g_func, words[0])) |
3403 | aerr("endp '%s' while in_func '%s'?\n", |
3404 | words[0], g_func); |
bfa4a6ee |
3405 | |
4c45fa73 |
3406 | pending_endp = 1; |
91977a1c |
3407 | continue; |
3408 | } |
3409 | |
bfa4a6ee |
3410 | p = strchr(words[0], ':'); |
3411 | if (p != NULL) { |
d4e3b5db |
3412 | set_label(pi, words[0]); |
bfa4a6ee |
3413 | continue; |
3414 | } |
3415 | |
3416 | if (!in_func || skip_func) { |
3417 | if (!skip_warned && !skip_func && g_labels[pi][0] != 0) { |
3418 | if (verbose) |
3419 | anote("skipping from '%s'\n", g_labels[pi]); |
3420 | skip_warned = 1; |
3421 | } |
3422 | g_labels[pi][0] = 0; |
3423 | continue; |
3424 | } |
3425 | |
4c45fa73 |
3426 | if (wordc > 1 && IS(words[1], "=")) { |
91977a1c |
3427 | if (wordc != 5) |
3428 | aerr("unhandled equ, wc=%d\n", wordc); |
3429 | if (g_eqcnt >= eq_alloc) { |
3430 | eq_alloc *= 2; |
3431 | g_eqs = realloc(g_eqs, eq_alloc * sizeof(g_eqs[0])); |
3432 | my_assert_not(g_eqs, NULL); |
3433 | } |
3434 | |
3435 | len = strlen(words[0]); |
3436 | if (len > sizeof(g_eqs[0].name) - 1) |
3437 | aerr("equ name too long: %d\n", len); |
3438 | strcpy(g_eqs[g_eqcnt].name, words[0]); |
3439 | |
3440 | if (!IS(words[3], "ptr")) |
3441 | aerr("unhandled equ\n"); |
3442 | if (IS(words[2], "dword")) |
3443 | g_eqs[g_eqcnt].lmod = OPLM_DWORD; |
3444 | else if (IS(words[2], "word")) |
3445 | g_eqs[g_eqcnt].lmod = OPLM_WORD; |
3446 | else if (IS(words[2], "byte")) |
3447 | g_eqs[g_eqcnt].lmod = OPLM_BYTE; |
3448 | else |
3449 | aerr("bad lmod: '%s'\n", words[2]); |
3450 | |
3451 | g_eqs[g_eqcnt].offset = parse_number(words[4]); |
3452 | g_eqcnt++; |
3453 | continue; |
3454 | } |
3455 | |
3456 | if (pi >= ARRAY_SIZE(ops)) |
3457 | aerr("too many ops\n"); |
3458 | |
91977a1c |
3459 | parse_op(&ops[pi], words, wordc); |
3460 | pi++; |
91977a1c |
3461 | } |
3462 | |
3463 | fclose(fout); |
3464 | fclose(fasm); |
06c5d854 |
3465 | fclose(g_fhdr); |
91977a1c |
3466 | |
3467 | return 0; |
c36e914d |
3468 | } |
91977a1c |
3469 | |
3470 | // vim:ts=2:shiftwidth=2:expandtab |