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 | |
054f95b2 |
29 | #include "masm_tools.h" |
30 | |
69a3cdfc |
31 | enum op_flags { |
87bf6cec |
32 | OPF_RMD = (1 << 0), /* removed or optimized out */ |
33 | OPF_DATA = (1 << 1), /* data processing - writes to dst opr */ |
34 | OPF_FLAGS = (1 << 2), /* sets flags */ |
35 | OPF_JMP = (1 << 3), /* branches, ret and call */ |
36 | OPF_CC = (1 << 4), /* uses flags */ |
37 | OPF_TAIL = (1 << 5), /* ret or tail call */ |
7ba45c34 |
38 | OPF_RSAVE = (1 << 6), /* push/pop is local reg save/load */ |
39 | OPF_REP = (1 << 7), /* prefixed by rep */ |
40 | OPF_REPZ = (1 << 8), /* rep is repe/repz */ |
41 | OPF_REPNZ = (1 << 9), /* rep is repne/repnz */ |
de50b98b |
42 | OPF_FARG = (1 << 10), /* push collected as func arg (no reuse) */ |
da87ae38 |
43 | OPF_EBP_S = (1 << 11), /* ebp used as scratch here, not BP */ |
c36e914d |
44 | }; |
45 | |
46 | enum op_op { |
47 | OP_INVAL, |
33c35af6 |
48 | OP_NOP, |
c36e914d |
49 | OP_PUSH, |
50 | OP_POP, |
51 | OP_MOV, |
850c9265 |
52 | OP_LEA, |
53 | OP_MOVZX, |
54 | OP_MOVSX, |
55 | OP_NOT, |
5101a5f9 |
56 | OP_CDQ, |
33c35af6 |
57 | OP_STOS, |
d4e3b5db |
58 | OP_MOVS, |
7ba45c34 |
59 | OP_CMPS, |
c36e914d |
60 | OP_RET, |
61 | OP_ADD, |
91977a1c |
62 | OP_SUB, |
850c9265 |
63 | OP_AND, |
64 | OP_OR, |
65 | OP_XOR, |
66 | OP_SHL, |
67 | OP_SHR, |
68 | OP_SAR, |
d4e3b5db |
69 | OP_ROL, |
70 | OP_ROR, |
69a3cdfc |
71 | OP_ADC, |
850c9265 |
72 | OP_SBB, |
73 | OP_INC, |
74 | OP_DEC, |
5101a5f9 |
75 | OP_NEG, |
850c9265 |
76 | OP_MUL, |
77 | OP_IMUL, |
5101a5f9 |
78 | OP_DIV, |
79 | OP_IDIV, |
c36e914d |
80 | OP_TEST, |
81 | OP_CMP, |
82 | OP_CALL, |
83 | OP_JMP, |
84 | OP_JO, |
85 | OP_JNO, |
86 | OP_JC, |
87 | OP_JNC, |
88 | OP_JZ, |
89 | OP_JNZ, |
90 | OP_JBE, |
91 | OP_JA, |
92 | OP_JS, |
93 | OP_JNS, |
94 | OP_JP, |
95 | OP_JNP, |
96 | OP_JL, |
97 | OP_JGE, |
98 | OP_JLE, |
99 | OP_JG, |
100 | }; |
101 | |
102 | enum opr_type { |
87bf6cec |
103 | OPT_UNSPEC, |
104 | OPT_REG, |
105 | OPT_REGMEM, |
106 | OPT_LABEL, |
850c9265 |
107 | OPT_OFFSET, |
87bf6cec |
108 | OPT_CONST, |
c36e914d |
109 | }; |
110 | |
2b43685d |
111 | // must be sorted (larger len must be further in enum) |
c36e914d |
112 | enum opr_lenmod { |
91977a1c |
113 | OPLM_UNSPEC, |
114 | OPLM_BYTE, |
115 | OPLM_WORD, |
116 | OPLM_DWORD, |
c36e914d |
117 | }; |
118 | |
850c9265 |
119 | #define MAX_OPERANDS 3 |
c36e914d |
120 | |
121 | struct parsed_opr { |
91977a1c |
122 | enum opr_type type; |
123 | enum opr_lenmod lmod; |
7ba45c34 |
124 | unsigned int is_ptr:1; // pointer in C |
125 | unsigned int is_array:1; // array in C |
a3684be1 |
126 | unsigned int type_from_var:1; // .. in header, sometimes wrong |
2b43685d |
127 | unsigned int size_mismatch:1; // type override differs from C |
128 | unsigned int size_lt:1; // type override is larger than C |
ddaf8bd7 |
129 | unsigned int had_ds:1; // had ds: prefix |
91977a1c |
130 | int reg; |
131 | unsigned int val; |
132 | char name[256]; |
c36e914d |
133 | }; |
134 | |
135 | struct parsed_op { |
91977a1c |
136 | enum op_op op; |
137 | struct parsed_opr operand[MAX_OPERANDS]; |
69a3cdfc |
138 | unsigned int flags; |
91977a1c |
139 | int operand_cnt; |
69a3cdfc |
140 | int regmask_src; // all referensed regs |
141 | int regmask_dst; |
940e8e66 |
142 | int pfomask; // flagop: parsed_flag_op that can't be delayed |
de50b98b |
143 | int argnum; // push: altered before call arg # |
940e8e66 |
144 | int cc_scratch; // scratch storage during analysis |
4c45fa73 |
145 | int bt_i; // branch target for branches |
146 | struct parsed_data *btj;// branch targets for jumptables |
91977a1c |
147 | void *datap; |
148 | }; |
149 | |
69a3cdfc |
150 | // datap: |
ddaf8bd7 |
151 | // OP_CALL - parser proto hint (str), ptr to struct parsed_proto |
2b43685d |
152 | // (OPF_CC) - point to one of (OPF_FLAGS) that affects cc op |
69a3cdfc |
153 | |
91977a1c |
154 | struct parsed_equ { |
155 | char name[64]; |
156 | enum opr_lenmod lmod; |
157 | int offset; |
c36e914d |
158 | }; |
159 | |
4c45fa73 |
160 | struct parsed_data { |
161 | char label[256]; |
162 | enum opr_type type; |
163 | enum opr_lenmod lmod; |
164 | int count; |
165 | int count_alloc; |
166 | struct { |
167 | union { |
168 | char *label; |
63df67be |
169 | unsigned int val; |
4c45fa73 |
170 | } u; |
171 | int bt_i; |
172 | } *d; |
173 | }; |
174 | |
175 | struct label_ref { |
176 | int i; |
177 | struct label_ref *next; |
178 | }; |
179 | |
1bafb621 |
180 | enum ida_func_attr { |
181 | IDAFA_BP_FRAME = (1 << 0), |
182 | IDAFA_LIB_FUNC = (1 << 1), |
183 | IDAFA_STATIC = (1 << 2), |
184 | IDAFA_NORETURN = (1 << 3), |
185 | IDAFA_THUNK = (1 << 4), |
186 | IDAFA_FPD = (1 << 5), |
187 | }; |
188 | |
189 | #define MAX_OPS 4096 |
c36e914d |
190 | |
191 | static struct parsed_op ops[MAX_OPS]; |
91977a1c |
192 | static struct parsed_equ *g_eqs; |
193 | static int g_eqcnt; |
194 | static char g_labels[MAX_OPS][32]; |
4c45fa73 |
195 | static struct label_ref g_label_refs[MAX_OPS]; |
bd96f656 |
196 | static const struct parsed_proto *g_func_pp; |
4c45fa73 |
197 | static struct parsed_data *g_func_pd; |
198 | static int g_func_pd_cnt; |
91977a1c |
199 | static char g_func[256]; |
200 | static char g_comment[256]; |
201 | static int g_bp_frame; |
1bafb621 |
202 | static int g_sp_frame; |
a2c1d768 |
203 | static int g_stack_frame_used; |
1bafb621 |
204 | static int g_stack_fsz; |
4c45fa73 |
205 | static int g_ida_func_attr; |
89ff3147 |
206 | static int g_allow_regfunc; |
91977a1c |
207 | #define ferr(op_, fmt, ...) do { \ |
63df67be |
208 | printf("error:%s:#%zd: '%s': " fmt, g_func, (op_) - ops, \ |
850c9265 |
209 | dump_op(op_), ##__VA_ARGS__); \ |
33c35af6 |
210 | fcloseall(); \ |
91977a1c |
211 | exit(1); \ |
212 | } while (0) |
de50b98b |
213 | #define fnote(op_, fmt, ...) \ |
214 | printf("error:%s:#%zd: '%s': " fmt, g_func, (op_) - ops, \ |
215 | dump_op(op_), ##__VA_ARGS__) |
91977a1c |
216 | |
217 | #define MAX_REGS 8 |
218 | |
219 | const char *regs_r32[] = { "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp" }; |
220 | const char *regs_r16[] = { "ax", "bx", "cx", "dx", "si", "di", "bp", "sp" }; |
221 | const char *regs_r8l[] = { "al", "bl", "cl", "dl" }; |
222 | const char *regs_r8h[] = { "ah", "bh", "ch", "dh" }; |
223 | |
224 | enum x86_regs { xUNSPEC = -1, xAX, xBX, xCX, xDX, xSI, xDI, xBP, xSP }; |
225 | |
69a3cdfc |
226 | // possible basic comparison types (without inversion) |
227 | enum parsed_flag_op { |
228 | PFO_O, // 0 OF=1 |
229 | PFO_C, // 2 CF=1 |
230 | PFO_Z, // 4 ZF=1 |
231 | PFO_BE, // 6 CF=1||ZF=1 |
232 | PFO_S, // 8 SF=1 |
233 | PFO_P, // a PF=1 |
234 | PFO_L, // c SF!=OF |
235 | PFO_LE, // e ZF=1||SF!=OF |
236 | }; |
237 | |
238 | static const char *parsed_flag_op_names[] = { |
239 | "o", "c", "z", "be", "s", "p", "l", "le" |
240 | }; |
241 | |
91977a1c |
242 | static int char_array_i(const char *array[], size_t len, const char *s) |
243 | { |
244 | int i; |
c36e914d |
245 | |
91977a1c |
246 | for (i = 0; i < len; i++) |
247 | if (IS(s, array[i])) |
248 | return i; |
c36e914d |
249 | |
91977a1c |
250 | return -1; |
251 | } |
252 | |
63df67be |
253 | static void printf_number(char *buf, size_t buf_size, |
254 | unsigned long number) |
91977a1c |
255 | { |
5101a5f9 |
256 | // output in C-friendly form |
257 | snprintf(buf, buf_size, number < 10 ? "%lu" : "0x%02lx", number); |
258 | } |
91977a1c |
259 | |
5101a5f9 |
260 | static int parse_reg(enum opr_lenmod *reg_lmod, const char *s) |
261 | { |
262 | int reg; |
91977a1c |
263 | |
5101a5f9 |
264 | reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s); |
265 | if (reg >= 0) { |
266 | *reg_lmod = OPLM_DWORD; |
267 | return reg; |
91977a1c |
268 | } |
5101a5f9 |
269 | reg = char_array_i(regs_r16, ARRAY_SIZE(regs_r16), s); |
270 | if (reg >= 0) { |
271 | *reg_lmod = OPLM_WORD; |
272 | return reg; |
273 | } |
274 | reg = char_array_i(regs_r8h, ARRAY_SIZE(regs_r8h), s); |
275 | if (reg >= 0) { |
276 | *reg_lmod = OPLM_BYTE; |
277 | return reg; |
278 | } |
279 | reg = char_array_i(regs_r8l, ARRAY_SIZE(regs_r8l), s); |
280 | if (reg >= 0) { |
281 | *reg_lmod = OPLM_BYTE; |
282 | return reg; |
850c9265 |
283 | } |
284 | |
285 | return -1; |
91977a1c |
286 | } |
287 | |
5101a5f9 |
288 | static int parse_indmode(char *name, int *regmask, int need_c_cvt) |
289 | { |
290 | enum opr_lenmod lmod; |
291 | char cvtbuf[256]; |
292 | char *d = cvtbuf; |
293 | char *s = name; |
294 | char w[64]; |
295 | long number; |
296 | int reg; |
297 | int c = 0; |
298 | |
299 | *d = 0; |
300 | |
301 | while (*s != 0) { |
302 | d += strlen(d); |
303 | while (my_isblank(*s)) |
304 | s++; |
305 | for (; my_issep(*s); d++, s++) |
306 | *d = *s; |
307 | while (my_isblank(*s)) |
308 | s++; |
309 | *d = 0; |
310 | |
87bf6cec |
311 | // skip 'ds:' prefix |
39b168b8 |
312 | if (IS_START(s, "ds:")) |
87bf6cec |
313 | s += 3; |
314 | |
5101a5f9 |
315 | s = next_idt(w, sizeof(w), s); |
316 | if (w[0] == 0) |
317 | break; |
318 | c++; |
319 | |
320 | reg = parse_reg(&lmod, w); |
321 | if (reg >= 0) { |
322 | *regmask |= 1 << reg; |
323 | goto pass; |
324 | } |
325 | |
326 | if ('0' <= w[0] && w[0] <= '9') { |
327 | number = parse_number(w); |
328 | printf_number(d, sizeof(cvtbuf) - (d - cvtbuf), number); |
329 | continue; |
330 | } |
331 | |
332 | // probably some label/identifier - pass |
333 | |
334 | pass: |
335 | snprintf(d, sizeof(cvtbuf) - (d - cvtbuf), "%s", w); |
336 | } |
337 | |
338 | if (need_c_cvt) |
339 | strcpy(name, cvtbuf); |
340 | |
341 | return c; |
342 | } |
343 | |
4c45fa73 |
344 | static int is_reg_in_str(const char *s) |
345 | { |
346 | int i; |
347 | |
348 | if (strlen(s) < 3 || (s[3] && !my_issep(s[3]) && !my_isblank(s[3]))) |
349 | return 0; |
350 | |
351 | for (i = 0; i < ARRAY_SIZE(regs_r32); i++) |
352 | if (!strncmp(s, regs_r32[i], 3)) |
353 | return 1; |
354 | |
355 | return 0; |
356 | } |
357 | |
358 | static const char *parse_stack_el(const char *name, char *extra_reg) |
d4e3b5db |
359 | { |
4c45fa73 |
360 | const char *p, *p2, *s; |
1bafb621 |
361 | char *endp = NULL; |
d4e3b5db |
362 | char buf[32]; |
1bafb621 |
363 | long val; |
d4e3b5db |
364 | int len; |
365 | |
4c45fa73 |
366 | p = name; |
367 | if (IS_START(p + 3, "+ebp+") && is_reg_in_str(p)) { |
368 | p += 4; |
369 | if (extra_reg != NULL) { |
370 | strncpy(extra_reg, name, 3); |
371 | extra_reg[4] = 0; |
372 | } |
d4e3b5db |
373 | } |
4c45fa73 |
374 | |
375 | if (IS_START(p, "ebp+")) { |
376 | p += 4; |
377 | |
378 | p2 = strchr(p, '+'); |
379 | if (p2 != NULL && is_reg_in_str(p)) { |
380 | if (extra_reg != NULL) { |
381 | strncpy(extra_reg, p, p2 - p); |
382 | extra_reg[p2 - p] = 0; |
383 | } |
384 | p = p2 + 1; |
385 | } |
386 | |
387 | if (!('0' <= *p && *p <= '9')) |
388 | return p; |
389 | |
390 | return NULL; |
391 | } |
392 | |
39b168b8 |
393 | if (!IS_START(name, "esp+")) |
d4e3b5db |
394 | return NULL; |
395 | |
396 | p = strchr(name + 4, '+'); |
397 | if (p) { |
1bafb621 |
398 | // must be a number after esp+, already converted to 0x.. |
399 | s = name + 4; |
400 | if (!('0' <= *s && *s <= '9')) { |
401 | aerr("%s nan?\n", __func__); |
d4e3b5db |
402 | return NULL; |
1bafb621 |
403 | } |
404 | if (s[0] == '0' && s[1] == 'x') |
405 | s += 2; |
406 | len = p - s; |
d4e3b5db |
407 | if (len < sizeof(buf) - 1) { |
1bafb621 |
408 | strncpy(buf, s, len); |
d4e3b5db |
409 | buf[len] = 0; |
1bafb621 |
410 | val = strtol(buf, &endp, 16); |
411 | if (val == 0 || *endp != 0) { |
412 | aerr("%s num parse fail for '%s'\n", __func__, buf); |
413 | return NULL; |
414 | } |
d4e3b5db |
415 | } |
416 | p++; |
417 | } |
418 | else |
419 | p = name + 4; |
420 | |
421 | if ('0' <= *p && *p <= '9') |
422 | return NULL; |
423 | |
424 | return p; |
425 | } |
426 | |
850c9265 |
427 | static int guess_lmod_from_name(struct parsed_opr *opr) |
428 | { |
429 | if (!strncmp(opr->name, "dword_", 6)) { |
430 | opr->lmod = OPLM_DWORD; |
431 | return 1; |
432 | } |
433 | if (!strncmp(opr->name, "word_", 5)) { |
434 | opr->lmod = OPLM_WORD; |
435 | return 1; |
436 | } |
437 | if (!strncmp(opr->name, "byte_", 5)) { |
438 | opr->lmod = OPLM_BYTE; |
439 | return 1; |
440 | } |
441 | return 0; |
442 | } |
443 | |
3ebea2cf |
444 | static int guess_lmod_from_c_type(enum opr_lenmod *lmod, |
445 | const struct parsed_type *c_type) |
06c5d854 |
446 | { |
06c5d854 |
447 | static const char *dword_types[] = { |
da87ae38 |
448 | "int", "_DWORD", "UINT_PTR", "DWORD", |
840257f6 |
449 | "WPARAM", "LPARAM", "UINT", |
da87ae38 |
450 | "HIMC", |
06c5d854 |
451 | }; |
452 | static const char *word_types[] = { |
89ff3147 |
453 | "uint16_t", "int16_t", "_WORD", |
2b43685d |
454 | "unsigned __int16", "__int16", |
06c5d854 |
455 | }; |
456 | static const char *byte_types[] = { |
2b43685d |
457 | "uint8_t", "int8_t", "char", |
89ff3147 |
458 | "unsigned __int8", "__int8", "BYTE", "_BYTE", |
a3684be1 |
459 | "_UNKNOWN", |
06c5d854 |
460 | }; |
3ebea2cf |
461 | const char *n; |
06c5d854 |
462 | int i; |
463 | |
3ebea2cf |
464 | if (c_type->is_ptr) { |
465 | *lmod = OPLM_DWORD; |
06c5d854 |
466 | return 1; |
467 | } |
468 | |
3ebea2cf |
469 | n = skip_type_mod(c_type->name); |
06c5d854 |
470 | |
3ebea2cf |
471 | for (i = 0; i < ARRAY_SIZE(dword_types); i++) { |
472 | if (IS(n, dword_types[i])) { |
473 | *lmod = OPLM_DWORD; |
06c5d854 |
474 | return 1; |
475 | } |
476 | } |
477 | |
478 | for (i = 0; i < ARRAY_SIZE(word_types); i++) { |
3ebea2cf |
479 | if (IS(n, word_types[i])) { |
480 | *lmod = OPLM_WORD; |
06c5d854 |
481 | return 1; |
482 | } |
483 | } |
484 | |
485 | for (i = 0; i < ARRAY_SIZE(byte_types); i++) { |
3ebea2cf |
486 | if (IS(n, byte_types[i])) { |
487 | *lmod = OPLM_BYTE; |
06c5d854 |
488 | return 1; |
489 | } |
490 | } |
491 | |
06c5d854 |
492 | return 0; |
493 | } |
494 | |
4c45fa73 |
495 | static enum opr_type lmod_from_directive(const char *d) |
496 | { |
497 | if (IS(d, "dd")) |
498 | return OPLM_DWORD; |
499 | else if (IS(d, "dw")) |
500 | return OPLM_WORD; |
501 | else if (IS(d, "db")) |
502 | return OPLM_BYTE; |
503 | |
504 | aerr("unhandled directive: '%s'\n", d); |
505 | return OPLM_UNSPEC; |
506 | } |
507 | |
5101a5f9 |
508 | static void setup_reg_opr(struct parsed_opr *opr, int reg, enum opr_lenmod lmod, |
509 | int *regmask) |
510 | { |
511 | opr->type = OPT_REG; |
512 | opr->reg = reg; |
513 | opr->lmod = lmod; |
514 | *regmask |= 1 << reg; |
515 | } |
516 | |
39b168b8 |
517 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
518 | int *extra_offs); |
87bf6cec |
519 | |
69a3cdfc |
520 | static int parse_operand(struct parsed_opr *opr, |
521 | int *regmask, int *regmask_indirect, |
1bafb621 |
522 | char words[16][256], int wordc, int w, unsigned int op_flags) |
c36e914d |
523 | { |
bd96f656 |
524 | const struct parsed_proto *pp; |
850c9265 |
525 | enum opr_lenmod tmplmod; |
63df67be |
526 | unsigned long number; |
89ff3147 |
527 | char buf[256]; |
850c9265 |
528 | int ret, len; |
1bafb621 |
529 | int wordc_in; |
89ff3147 |
530 | char *p; |
850c9265 |
531 | int i; |
c36e914d |
532 | |
1bafb621 |
533 | if (w >= wordc) |
534 | aerr("parse_operand w %d, wordc %d\n", w, wordc); |
c36e914d |
535 | |
1bafb621 |
536 | opr->reg = xUNSPEC; |
91977a1c |
537 | |
1bafb621 |
538 | for (i = w; i < wordc; i++) { |
539 | len = strlen(words[i]); |
540 | if (words[i][len - 1] == ',') { |
541 | words[i][len - 1] = 0; |
542 | wordc = i + 1; |
543 | break; |
544 | } |
545 | } |
c36e914d |
546 | |
1bafb621 |
547 | wordc_in = wordc - w; |
c36e914d |
548 | |
1bafb621 |
549 | if ((op_flags & OPF_JMP) && wordc_in > 0 |
550 | && !('0' <= words[w][0] && words[w][0] <= '9')) |
551 | { |
552 | const char *label = NULL; |
553 | |
554 | if (wordc_in == 3 && !strncmp(words[w], "near", 4) |
555 | && IS(words[w + 1], "ptr")) |
556 | label = words[w + 2]; |
557 | else if (wordc_in == 2 && IS(words[w], "short")) |
558 | label = words[w + 1]; |
559 | else if (wordc_in == 1 |
560 | && strchr(words[w], '[') == NULL |
561 | && parse_reg(&tmplmod, words[w]) < 0) |
562 | label = words[w]; |
563 | |
564 | if (label != NULL) { |
565 | opr->type = OPT_LABEL; |
ddaf8bd7 |
566 | if (IS_START(label, "ds:")) { |
567 | opr->had_ds = 1; |
39b168b8 |
568 | label += 3; |
ddaf8bd7 |
569 | } |
1bafb621 |
570 | strcpy(opr->name, label); |
571 | return wordc; |
572 | } |
573 | } |
c36e914d |
574 | |
1bafb621 |
575 | if (wordc_in >= 3) { |
576 | if (IS(words[w + 1], "ptr")) { |
577 | if (IS(words[w], "dword")) |
578 | opr->lmod = OPLM_DWORD; |
579 | else if (IS(words[w], "word")) |
580 | opr->lmod = OPLM_WORD; |
581 | else if (IS(words[w], "byte")) |
582 | opr->lmod = OPLM_BYTE; |
583 | else |
584 | aerr("type parsing failed\n"); |
585 | w += 2; |
586 | wordc_in = wordc - w; |
587 | } |
588 | } |
589 | |
39b168b8 |
590 | if (wordc_in == 2) { |
591 | if (IS(words[w], "offset")) { |
592 | opr->type = OPT_OFFSET; |
593 | strcpy(opr->name, words[w + 1]); |
594 | return wordc; |
595 | } |
596 | if (IS(words[w], "(offset")) { |
89ff3147 |
597 | p = strchr(words[w + 1], ')'); |
39b168b8 |
598 | if (p == NULL) |
599 | aerr("parse of bracketed offset failed\n"); |
600 | *p = 0; |
601 | opr->type = OPT_OFFSET; |
602 | strcpy(opr->name, words[w + 1]); |
603 | return wordc; |
604 | } |
1bafb621 |
605 | } |
c36e914d |
606 | |
1bafb621 |
607 | if (wordc_in != 1) |
850c9265 |
608 | aerr("parse_operand 1 word expected\n"); |
c36e914d |
609 | |
ddaf8bd7 |
610 | if (IS_START(words[w], "ds:")) { |
611 | opr->had_ds = 1; |
89ff3147 |
612 | memmove(words[w], words[w] + 3, strlen(words[w]) - 2); |
ddaf8bd7 |
613 | } |
89ff3147 |
614 | strcpy(opr->name, words[w]); |
c36e914d |
615 | |
850c9265 |
616 | if (words[w][0] == '[') { |
617 | opr->type = OPT_REGMEM; |
618 | ret = sscanf(words[w], "[%[^]]]", opr->name); |
619 | if (ret != 1) |
620 | aerr("[] parse failure\n"); |
87bf6cec |
621 | |
5101a5f9 |
622 | parse_indmode(opr->name, regmask_indirect, 1); |
4c45fa73 |
623 | if (opr->lmod == OPLM_UNSPEC && parse_stack_el(opr->name, NULL)) { |
87bf6cec |
624 | // might be an equ |
d4e3b5db |
625 | struct parsed_equ *eq = |
4c45fa73 |
626 | equ_find(NULL, parse_stack_el(opr->name, NULL), &i); |
87bf6cec |
627 | if (eq) |
628 | opr->lmod = eq->lmod; |
629 | } |
850c9265 |
630 | return wordc; |
631 | } |
632 | else if (strchr(words[w], '[')) { |
633 | // label[reg] form |
89ff3147 |
634 | p = strchr(words[w], '['); |
850c9265 |
635 | opr->type = OPT_REGMEM; |
89ff3147 |
636 | parse_indmode(p, regmask_indirect, 0); |
637 | strncpy(buf, words[w], p - words[w]); |
638 | buf[p - words[w]] = 0; |
639 | pp = proto_parse(g_fhdr, buf, 1); |
640 | goto do_label; |
850c9265 |
641 | } |
642 | else if (('0' <= words[w][0] && words[w][0] <= '9') |
643 | || words[w][0] == '-') |
644 | { |
5101a5f9 |
645 | number = parse_number(words[w]); |
91977a1c |
646 | opr->type = OPT_CONST; |
5101a5f9 |
647 | opr->val = number; |
648 | printf_number(opr->name, sizeof(opr->name), number); |
91977a1c |
649 | return wordc; |
850c9265 |
650 | } |
c36e914d |
651 | |
5101a5f9 |
652 | ret = parse_reg(&tmplmod, opr->name); |
653 | if (ret >= 0) { |
654 | setup_reg_opr(opr, ret, tmplmod, regmask); |
850c9265 |
655 | return wordc; |
656 | } |
657 | |
658 | // most likely var in data segment |
659 | opr->type = OPT_LABEL; |
36595fd2 |
660 | pp = proto_parse(g_fhdr, opr->name, 0); |
89ff3147 |
661 | |
662 | do_label: |
bd96f656 |
663 | if (pp != NULL) { |
1cd4a663 |
664 | if (pp->is_fptr || pp->is_func) { |
06c5d854 |
665 | opr->lmod = OPLM_DWORD; |
666 | opr->is_ptr = 1; |
667 | } |
2b43685d |
668 | else { |
840257f6 |
669 | tmplmod = OPLM_UNSPEC; |
bd96f656 |
670 | if (!guess_lmod_from_c_type(&tmplmod, &pp->type)) |
2b43685d |
671 | anote("unhandled C type '%s' for '%s'\n", |
bd96f656 |
672 | pp->type.name, opr->name); |
2b43685d |
673 | |
a3684be1 |
674 | if (opr->lmod == OPLM_UNSPEC) { |
2b43685d |
675 | opr->lmod = tmplmod; |
a3684be1 |
676 | opr->type_from_var = 1; |
677 | } |
2b43685d |
678 | else if (opr->lmod != tmplmod) { |
679 | opr->size_mismatch = 1; |
680 | if (tmplmod < opr->lmod) |
681 | opr->size_lt = 1; |
682 | } |
a652aa9f |
683 | opr->is_ptr = pp->type.is_ptr; |
3ebea2cf |
684 | } |
bd96f656 |
685 | opr->is_array = pp->type.is_array; |
06c5d854 |
686 | } |
687 | |
850c9265 |
688 | if (opr->lmod == OPLM_UNSPEC) |
689 | guess_lmod_from_name(opr); |
850c9265 |
690 | return wordc; |
c36e914d |
691 | } |
692 | |
33c35af6 |
693 | static const struct { |
694 | const char *name; |
695 | unsigned int flags; |
696 | } pref_table[] = { |
697 | { "rep", OPF_REP }, |
7ba45c34 |
698 | { "repe", OPF_REP|OPF_REPZ }, |
699 | { "repz", OPF_REP|OPF_REPZ }, |
700 | { "repne", OPF_REP|OPF_REPNZ }, |
701 | { "repnz", OPF_REP|OPF_REPNZ }, |
33c35af6 |
702 | }; |
703 | |
c36e914d |
704 | static const struct { |
850c9265 |
705 | const char *name; |
706 | enum op_op op; |
69a3cdfc |
707 | unsigned int minopr; |
708 | unsigned int maxopr; |
709 | unsigned int flags; |
c36e914d |
710 | } op_table[] = { |
33c35af6 |
711 | { "nop", OP_NOP, 0, 0, 0 }, |
69a3cdfc |
712 | { "push", OP_PUSH, 1, 1, 0 }, |
713 | { "pop", OP_POP, 1, 1, OPF_DATA }, |
714 | { "mov" , OP_MOV, 2, 2, OPF_DATA }, |
715 | { "lea", OP_LEA, 2, 2, OPF_DATA }, |
716 | { "movzx",OP_MOVZX, 2, 2, OPF_DATA }, |
717 | { "movsx",OP_MOVSX, 2, 2, OPF_DATA }, |
718 | { "not", OP_NOT, 1, 1, OPF_DATA }, |
5101a5f9 |
719 | { "cdq", OP_CDQ, 0, 0, OPF_DATA }, |
33c35af6 |
720 | { "stosb",OP_STOS, 0, 0, OPF_DATA }, |
721 | { "stosw",OP_STOS, 0, 0, OPF_DATA }, |
722 | { "stosd",OP_STOS, 0, 0, OPF_DATA }, |
d4e3b5db |
723 | { "movsb",OP_MOVS, 0, 0, OPF_DATA }, |
724 | { "movsw",OP_MOVS, 0, 0, OPF_DATA }, |
725 | { "movsd",OP_MOVS, 0, 0, OPF_DATA }, |
7ba45c34 |
726 | { "cmpsb",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
727 | { "cmpsw",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
728 | { "cmpsd",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
729 | { "add", OP_ADD, 2, 2, OPF_DATA|OPF_FLAGS }, |
730 | { "sub", OP_SUB, 2, 2, OPF_DATA|OPF_FLAGS }, |
731 | { "and", OP_AND, 2, 2, OPF_DATA|OPF_FLAGS }, |
732 | { "or", OP_OR, 2, 2, OPF_DATA|OPF_FLAGS }, |
733 | { "xor", OP_XOR, 2, 2, OPF_DATA|OPF_FLAGS }, |
734 | { "shl", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
735 | { "shr", OP_SHR, 2, 2, OPF_DATA|OPF_FLAGS }, |
736 | { "sal", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
737 | { "sar", OP_SAR, 2, 2, OPF_DATA|OPF_FLAGS }, |
d4e3b5db |
738 | { "rol", OP_ROL, 2, 2, OPF_DATA|OPF_FLAGS }, |
739 | { "ror", OP_ROR, 2, 2, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
740 | { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC }, |
69a3cdfc |
741 | { "sbb", OP_SBB, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC }, |
742 | { "inc", OP_INC, 1, 1, OPF_DATA|OPF_FLAGS }, |
743 | { "dec", OP_DEC, 1, 1, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
744 | { "neg", OP_NEG, 1, 1, OPF_DATA|OPF_FLAGS }, |
745 | { "mul", OP_MUL, 1, 1, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
746 | { "imul", OP_IMUL, 1, 3, OPF_DATA|OPF_FLAGS }, |
5101a5f9 |
747 | { "div", OP_DIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
748 | { "idiv", OP_IDIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
749 | { "test", OP_TEST, 2, 2, OPF_FLAGS }, |
750 | { "cmp", OP_CMP, 2, 2, OPF_FLAGS }, |
a3684be1 |
751 | { "retn", OP_RET, 0, 1, OPF_TAIL }, |
de50b98b |
752 | { "call", OP_CALL, 1, 1, OPF_JMP|OPF_DATA|OPF_FLAGS }, |
69a3cdfc |
753 | { "jmp", OP_JMP, 1, 1, OPF_JMP }, |
754 | { "jo", OP_JO, 1, 1, OPF_JMP|OPF_CC }, // 70 OF=1 |
755 | { "jno", OP_JNO, 1, 1, OPF_JMP|OPF_CC }, // 71 OF=0 |
756 | { "jc", OP_JC, 1, 1, OPF_JMP|OPF_CC }, // 72 CF=1 |
757 | { "jb", OP_JC, 1, 1, OPF_JMP|OPF_CC }, // 72 |
758 | { "jnc", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73 CF=0 |
33c35af6 |
759 | { "jnb", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73 |
69a3cdfc |
760 | { "jae", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73 |
761 | { "jz", OP_JZ, 1, 1, OPF_JMP|OPF_CC }, // 74 ZF=1 |
762 | { "je", OP_JZ, 1, 1, OPF_JMP|OPF_CC }, // 74 |
763 | { "jnz", OP_JNZ, 1, 1, OPF_JMP|OPF_CC }, // 75 ZF=0 |
764 | { "jne", OP_JNZ, 1, 1, OPF_JMP|OPF_CC }, // 75 |
765 | { "jbe", OP_JBE, 1, 1, OPF_JMP|OPF_CC }, // 76 CF=1 || ZF=1 |
766 | { "jna", OP_JBE, 1, 1, OPF_JMP|OPF_CC }, // 76 |
767 | { "ja", OP_JA, 1, 1, OPF_JMP|OPF_CC }, // 77 CF=0 && ZF=0 |
768 | { "jnbe", OP_JA, 1, 1, OPF_JMP|OPF_CC }, // 77 |
769 | { "js", OP_JS, 1, 1, OPF_JMP|OPF_CC }, // 78 SF=1 |
770 | { "jns", OP_JNS, 1, 1, OPF_JMP|OPF_CC }, // 79 SF=0 |
771 | { "jp", OP_JP, 1, 1, OPF_JMP|OPF_CC }, // 7a PF=1 |
772 | { "jpe", OP_JP, 1, 1, OPF_JMP|OPF_CC }, // 7a |
773 | { "jnp", OP_JNP, 1, 1, OPF_JMP|OPF_CC }, // 7b PF=0 |
774 | { "jpo", OP_JNP, 1, 1, OPF_JMP|OPF_CC }, // 7b |
775 | { "jl", OP_JL, 1, 1, OPF_JMP|OPF_CC }, // 7c SF!=OF |
776 | { "jnge", OP_JL, 1, 1, OPF_JMP|OPF_CC }, // 7c |
777 | { "jge", OP_JGE, 1, 1, OPF_JMP|OPF_CC }, // 7d SF=OF |
778 | { "jnl", OP_JGE, 1, 1, OPF_JMP|OPF_CC }, // 7d |
779 | { "jle", OP_JLE, 1, 1, OPF_JMP|OPF_CC }, // 7e ZF=1 || SF!=OF |
780 | { "jng", OP_JLE, 1, 1, OPF_JMP|OPF_CC }, // 7e |
781 | { "jg", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f ZF=0 && SF=OF |
782 | { "jnle", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f |
5101a5f9 |
783 | { "seto", OP_JO, 1, 1, OPF_DATA|OPF_CC }, |
784 | { "setno", OP_JNO, 1, 1, OPF_DATA|OPF_CC }, |
785 | { "setc", OP_JC, 1, 1, OPF_DATA|OPF_CC }, |
786 | { "setb", OP_JC, 1, 1, OPF_DATA|OPF_CC }, |
787 | { "setnc", OP_JNC, 1, 1, OPF_DATA|OPF_CC }, |
788 | { "setae", OP_JNC, 1, 1, OPF_DATA|OPF_CC }, |
789 | { "setz", OP_JZ, 1, 1, OPF_DATA|OPF_CC }, |
790 | { "sete", OP_JZ, 1, 1, OPF_DATA|OPF_CC }, |
791 | { "setnz", OP_JNZ, 1, 1, OPF_DATA|OPF_CC }, |
792 | { "setne", OP_JNZ, 1, 1, OPF_DATA|OPF_CC }, |
793 | { "setbe", OP_JBE, 1, 1, OPF_DATA|OPF_CC }, |
794 | { "setna", OP_JBE, 1, 1, OPF_DATA|OPF_CC }, |
795 | { "seta", OP_JA, 1, 1, OPF_DATA|OPF_CC }, |
796 | { "setnbe", OP_JA, 1, 1, OPF_DATA|OPF_CC }, |
797 | { "sets", OP_JS, 1, 1, OPF_DATA|OPF_CC }, |
798 | { "setns", OP_JNS, 1, 1, OPF_DATA|OPF_CC }, |
799 | { "setp", OP_JP, 1, 1, OPF_DATA|OPF_CC }, |
800 | { "setpe", OP_JP, 1, 1, OPF_DATA|OPF_CC }, |
801 | { "setnp", OP_JNP, 1, 1, OPF_DATA|OPF_CC }, |
802 | { "setpo", OP_JNP, 1, 1, OPF_DATA|OPF_CC }, |
803 | { "setl", OP_JL, 1, 1, OPF_DATA|OPF_CC }, |
804 | { "setnge", OP_JL, 1, 1, OPF_DATA|OPF_CC }, |
805 | { "setge", OP_JGE, 1, 1, OPF_DATA|OPF_CC }, |
806 | { "setnl", OP_JGE, 1, 1, OPF_DATA|OPF_CC }, |
807 | { "setle", OP_JLE, 1, 1, OPF_DATA|OPF_CC }, |
808 | { "setng", OP_JLE, 1, 1, OPF_DATA|OPF_CC }, |
809 | { "setg", OP_JG, 1, 1, OPF_DATA|OPF_CC }, |
810 | { "setnle", OP_JG, 1, 1, OPF_DATA|OPF_CC }, |
69a3cdfc |
811 | }; |
c36e914d |
812 | |
813 | static void parse_op(struct parsed_op *op, char words[16][256], int wordc) |
814 | { |
bfa4a6ee |
815 | enum opr_lenmod lmod = OPLM_UNSPEC; |
33c35af6 |
816 | int prefix_flags = 0; |
69a3cdfc |
817 | int regmask_ind; |
818 | int regmask; |
33c35af6 |
819 | int op_w = 0; |
91977a1c |
820 | int opr = 0; |
33c35af6 |
821 | int w = 0; |
91977a1c |
822 | int i; |
c36e914d |
823 | |
33c35af6 |
824 | for (i = 0; i < ARRAY_SIZE(pref_table); i++) { |
825 | if (IS(words[w], pref_table[i].name)) { |
826 | prefix_flags = pref_table[i].flags; |
827 | break; |
828 | } |
829 | } |
830 | |
831 | if (prefix_flags) { |
832 | if (wordc <= 1) |
833 | aerr("lone prefix: '%s'\n", words[0]); |
834 | w++; |
835 | } |
836 | |
837 | op_w = w; |
91977a1c |
838 | for (i = 0; i < ARRAY_SIZE(op_table); i++) { |
33c35af6 |
839 | if (IS(words[w], op_table[i].name)) |
69a3cdfc |
840 | break; |
841 | } |
c36e914d |
842 | |
69a3cdfc |
843 | if (i == ARRAY_SIZE(op_table)) |
844 | aerr("unhandled op: '%s'\n", words[0]); |
33c35af6 |
845 | w++; |
c36e914d |
846 | |
69a3cdfc |
847 | op->op = op_table[i].op; |
33c35af6 |
848 | op->flags = op_table[i].flags | prefix_flags; |
69a3cdfc |
849 | op->regmask_src = op->regmask_dst = 0; |
850 | |
851 | for (opr = 0; opr < op_table[i].minopr; opr++) { |
852 | regmask = regmask_ind = 0; |
853 | w = parse_operand(&op->operand[opr], ®mask, ®mask_ind, |
854 | words, wordc, w, op->flags); |
855 | |
856 | if (opr == 0 && (op->flags & OPF_DATA)) |
857 | op->regmask_dst = regmask; |
858 | // for now, mark dst as src too |
859 | op->regmask_src |= regmask | regmask_ind; |
860 | } |
c36e914d |
861 | |
69a3cdfc |
862 | for (; w < wordc && opr < op_table[i].maxopr; opr++) { |
863 | w = parse_operand(&op->operand[opr], |
864 | &op->regmask_src, &op->regmask_src, |
865 | words, wordc, w, op->flags); |
91977a1c |
866 | } |
c36e914d |
867 | |
91977a1c |
868 | if (w < wordc) |
869 | aerr("parse_op %s incomplete: %d/%d\n", |
870 | words[0], w, wordc); |
5101a5f9 |
871 | |
872 | // special cases |
873 | op->operand_cnt = opr; |
874 | if (!strncmp(op_table[i].name, "set", 3)) |
875 | op->operand[0].lmod = OPLM_BYTE; |
876 | |
877 | // ops with implicit argumets |
878 | switch (op->op) { |
879 | case OP_CDQ: |
880 | op->operand_cnt = 2; |
881 | setup_reg_opr(&op->operand[0], xDX, OPLM_DWORD, &op->regmask_dst); |
882 | setup_reg_opr(&op->operand[1], xAX, OPLM_DWORD, &op->regmask_src); |
883 | break; |
884 | |
33c35af6 |
885 | case OP_STOS: |
886 | if (op->operand_cnt != 0) |
887 | break; |
888 | if (IS(words[op_w], "stosb")) |
889 | lmod = OPLM_BYTE; |
890 | else if (IS(words[op_w], "stosw")) |
891 | lmod = OPLM_WORD; |
892 | else if (IS(words[op_w], "stosd")) |
893 | lmod = OPLM_DWORD; |
894 | op->operand_cnt = 3; |
d4e3b5db |
895 | setup_reg_opr(&op->operand[0], xDI, lmod, &op->regmask_src); |
896 | setup_reg_opr(&op->operand[1], xCX, OPLM_DWORD, &op->regmask_src); |
897 | op->regmask_dst = op->regmask_src; |
33c35af6 |
898 | setup_reg_opr(&op->operand[2], xAX, OPLM_DWORD, &op->regmask_src); |
899 | break; |
900 | |
d4e3b5db |
901 | case OP_MOVS: |
7ba45c34 |
902 | case OP_CMPS: |
d4e3b5db |
903 | if (op->operand_cnt != 0) |
904 | break; |
7ba45c34 |
905 | if (words[op_w][4] == 'b') |
d4e3b5db |
906 | lmod = OPLM_BYTE; |
7ba45c34 |
907 | else if (words[op_w][4] == 'w') |
d4e3b5db |
908 | lmod = OPLM_WORD; |
7ba45c34 |
909 | else if (words[op_w][4] == 'd') |
d4e3b5db |
910 | lmod = OPLM_DWORD; |
911 | op->operand_cnt = 3; |
912 | setup_reg_opr(&op->operand[0], xDI, lmod, &op->regmask_src); |
913 | setup_reg_opr(&op->operand[1], xSI, OPLM_DWORD, &op->regmask_src); |
914 | setup_reg_opr(&op->operand[2], xCX, OPLM_DWORD, &op->regmask_src); |
915 | op->regmask_dst = op->regmask_src; |
916 | break; |
917 | |
5101a5f9 |
918 | case OP_IMUL: |
919 | if (op->operand_cnt != 1) |
920 | break; |
921 | // fallthrough |
922 | case OP_MUL: |
923 | // singleop mul |
924 | op->regmask_dst = (1 << xDX) | (1 << xAX); |
925 | op->regmask_src |= (1 << xAX); |
926 | if (op->operand[0].lmod == OPLM_UNSPEC) |
927 | op->operand[0].lmod = OPLM_DWORD; |
928 | break; |
929 | |
930 | case OP_DIV: |
931 | case OP_IDIV: |
932 | // we could set up operands for edx:eax, but there is no real need to |
933 | // (see is_opr_modified()) |
934 | regmask = (1 << xDX) | (1 << xAX); |
935 | op->regmask_dst = regmask; |
936 | op->regmask_src |= regmask; |
937 | if (op->operand[0].lmod == OPLM_UNSPEC) |
938 | op->operand[0].lmod = OPLM_DWORD; |
939 | break; |
940 | |
941 | case OP_SHL: |
942 | case OP_SHR: |
943 | case OP_SAR: |
d4e3b5db |
944 | case OP_ROL: |
945 | case OP_ROR: |
5101a5f9 |
946 | if (op->operand[1].lmod == OPLM_UNSPEC) |
947 | op->operand[1].lmod = OPLM_BYTE; |
948 | break; |
949 | |
7ba45c34 |
950 | case OP_PUSH: |
951 | if (op->operand[0].lmod == OPLM_UNSPEC |
952 | && (op->operand[0].type == OPT_CONST |
953 | || op->operand[0].type == OPT_OFFSET |
954 | || op->operand[0].type == OPT_LABEL)) |
955 | op->operand[0].lmod = OPLM_DWORD; |
956 | break; |
957 | |
3ebea2cf |
958 | // alignment |
959 | case OP_MOV: |
960 | if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG |
961 | && op->operand[0].reg == xDI && op->operand[1].reg == xDI) |
962 | { |
963 | op->flags |= OPF_RMD; |
964 | } |
965 | break; |
966 | |
de50b98b |
967 | case OP_LEA: |
968 | if (op->operand[0].type == OPT_REG |
969 | && op->operand[1].type == OPT_REGMEM) |
970 | { |
971 | char buf[16]; |
972 | snprintf(buf, sizeof(buf), "%s+0", op->operand[0].name); |
973 | if (IS(buf, op->operand[1].name)) |
974 | op->flags |= OPF_RMD; |
975 | } |
976 | break; |
977 | |
89ff3147 |
978 | case OP_CALL: |
979 | // trashed regs must be explicitly detected later |
980 | op->regmask_dst = 0; |
981 | break; |
982 | |
5101a5f9 |
983 | default: |
984 | break; |
985 | } |
c36e914d |
986 | } |
987 | |
850c9265 |
988 | static const char *op_name(enum op_op op) |
989 | { |
990 | int i; |
991 | |
992 | for (i = 0; i < ARRAY_SIZE(op_table); i++) |
993 | if (op_table[i].op == op) |
994 | return op_table[i].name; |
995 | |
996 | return "???"; |
997 | } |
998 | |
999 | // debug |
1000 | static const char *dump_op(struct parsed_op *po) |
1001 | { |
1002 | static char out[128]; |
1003 | char *p = out; |
1004 | int i; |
1005 | |
4c45fa73 |
1006 | if (po == NULL) |
1007 | return "???"; |
1008 | |
850c9265 |
1009 | snprintf(out, sizeof(out), "%s", op_name(po->op)); |
1010 | for (i = 0; i < po->operand_cnt; i++) { |
1011 | p += strlen(p); |
1012 | if (i > 0) |
1013 | *p++ = ','; |
1014 | snprintf(p, sizeof(out) - (p - out), |
1015 | po->operand[i].type == OPT_REGMEM ? " [%s]" : " %s", |
1016 | po->operand[i].name); |
1017 | } |
1018 | |
1019 | return out; |
1020 | } |
1021 | |
4c45fa73 |
1022 | static const char *lmod_type_u(struct parsed_op *po, |
1023 | enum opr_lenmod lmod) |
1024 | { |
1025 | switch (lmod) { |
1026 | case OPLM_DWORD: |
1027 | return "u32"; |
1028 | case OPLM_WORD: |
1029 | return "u16"; |
1030 | case OPLM_BYTE: |
1031 | return "u8"; |
1032 | default: |
1033 | ferr(po, "invalid lmod: %d\n", lmod); |
1034 | return "(_invalid_)"; |
1035 | } |
1036 | } |
1037 | |
d4e3b5db |
1038 | static const char *lmod_cast_u(struct parsed_op *po, |
1039 | enum opr_lenmod lmod) |
1040 | { |
1041 | switch (lmod) { |
1042 | case OPLM_DWORD: |
1043 | return ""; |
1044 | case OPLM_WORD: |
1045 | return "(u16)"; |
1046 | case OPLM_BYTE: |
1047 | return "(u8)"; |
1048 | default: |
1049 | ferr(po, "invalid lmod: %d\n", lmod); |
1050 | return "(_invalid_)"; |
1051 | } |
1052 | } |
1053 | |
1054 | static const char *lmod_cast_u_ptr(struct parsed_op *po, |
1055 | enum opr_lenmod lmod) |
1056 | { |
1057 | switch (lmod) { |
1058 | case OPLM_DWORD: |
1059 | return "*(u32 *)"; |
1060 | case OPLM_WORD: |
1061 | return "*(u16 *)"; |
1062 | case OPLM_BYTE: |
1063 | return "*(u8 *)"; |
1064 | default: |
1065 | ferr(po, "invalid lmod: %d\n", lmod); |
1066 | return "(_invalid_)"; |
1067 | } |
1068 | } |
1069 | |
1070 | static const char *lmod_cast_s(struct parsed_op *po, |
1071 | enum opr_lenmod lmod) |
1072 | { |
1073 | switch (lmod) { |
1074 | case OPLM_DWORD: |
1075 | return "(s32)"; |
1076 | case OPLM_WORD: |
1077 | return "(s16)"; |
1078 | case OPLM_BYTE: |
1079 | return "(s8)"; |
1080 | default: |
1081 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
1082 | return "(_invalid_)"; |
1083 | } |
1084 | } |
1085 | |
1086 | static const char *lmod_cast(struct parsed_op *po, |
1087 | enum opr_lenmod lmod, int is_signed) |
1088 | { |
1089 | return is_signed ? |
1090 | lmod_cast_s(po, lmod) : |
1091 | lmod_cast_u(po, lmod); |
1092 | } |
1093 | |
1094 | static int lmod_bytes(struct parsed_op *po, enum opr_lenmod lmod) |
1095 | { |
1096 | switch (lmod) { |
1097 | case OPLM_DWORD: |
1098 | return 4; |
1099 | case OPLM_WORD: |
1100 | return 2; |
1101 | case OPLM_BYTE: |
1102 | return 1; |
1103 | default: |
1104 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
1105 | return 0; |
1106 | } |
1107 | } |
1108 | |
91977a1c |
1109 | static const char *opr_name(struct parsed_op *po, int opr_num) |
c36e914d |
1110 | { |
91977a1c |
1111 | if (opr_num >= po->operand_cnt) |
1112 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
1113 | return po->operand[opr_num].name; |
c36e914d |
1114 | } |
1115 | |
91977a1c |
1116 | static unsigned int opr_const(struct parsed_op *po, int opr_num) |
c36e914d |
1117 | { |
91977a1c |
1118 | if (opr_num >= po->operand_cnt) |
1119 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
1120 | if (po->operand[opr_num].type != OPT_CONST) |
1121 | ferr(po, "opr %d: const expected\n", opr_num); |
1122 | return po->operand[opr_num].val; |
1123 | } |
c36e914d |
1124 | |
91977a1c |
1125 | static const char *opr_reg_p(struct parsed_op *po, struct parsed_opr *popr) |
1126 | { |
1127 | if ((unsigned int)popr->reg >= MAX_REGS) |
1128 | ferr(po, "invalid reg: %d\n", popr->reg); |
1129 | return regs_r32[popr->reg]; |
1130 | } |
c36e914d |
1131 | |
a2c1d768 |
1132 | // cast1 is the "final" cast |
1133 | static const char *simplify_cast(const char *cast1, const char *cast2) |
1134 | { |
1135 | static char buf[256]; |
1136 | |
1137 | if (cast1[0] == 0) |
1138 | return cast2; |
1139 | if (cast2[0] == 0) |
1140 | return cast1; |
1141 | if (IS(cast1, cast2)) |
1142 | return cast1; |
1143 | if (IS(cast1, "(s8)") && IS(cast2, "(u8)")) |
1144 | return cast1; |
1145 | if (IS(cast1, "(s16)") && IS(cast2, "(u16)")) |
1146 | return cast1; |
1147 | if (IS(cast1, "(u8)") && IS_START(cast2, "*(u8 *)")) |
1148 | return cast2; |
1149 | if (IS(cast1, "(u16)") && IS_START(cast2, "*(u16 *)")) |
1150 | return cast2; |
1cd4a663 |
1151 | if (strchr(cast1, '*') && IS_START(cast2, "(u32)")) |
1152 | return cast1; |
a2c1d768 |
1153 | |
1154 | snprintf(buf, sizeof(buf), "%s%s", cast1, cast2); |
1155 | return buf; |
1156 | } |
1157 | |
1158 | static const char *simplify_cast_num(const char *cast, unsigned int val) |
1159 | { |
1160 | if (IS(cast, "(u8)") && val < 0x100) |
1161 | return ""; |
1162 | if (IS(cast, "(s8)") && val < 0x80) |
1163 | return ""; |
1164 | if (IS(cast, "(u16)") && val < 0x10000) |
1165 | return ""; |
1166 | if (IS(cast, "(s16)") && val < 0x8000) |
1167 | return ""; |
1168 | if (IS(cast, "(s32)") && val < 0x80000000) |
1169 | return ""; |
1170 | |
1171 | return cast; |
1172 | } |
1173 | |
39b168b8 |
1174 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
1175 | int *extra_offs) |
91977a1c |
1176 | { |
39b168b8 |
1177 | const char *p; |
1178 | char *endp; |
1179 | int namelen; |
850c9265 |
1180 | int i; |
1181 | |
39b168b8 |
1182 | *extra_offs = 0; |
1183 | namelen = strlen(name); |
1184 | |
1185 | p = strchr(name, '+'); |
1186 | if (p != NULL) { |
1187 | namelen = p - name; |
1188 | if (namelen <= 0) |
1189 | ferr(po, "equ parse failed for '%s'\n", name); |
1190 | |
1191 | if (IS_START(p, "0x")) |
1192 | p += 2; |
1193 | *extra_offs = strtol(p, &endp, 16); |
1194 | if (*endp != 0) |
1195 | ferr(po, "equ parse failed for '%s'\n", name); |
1196 | } |
1197 | |
850c9265 |
1198 | for (i = 0; i < g_eqcnt; i++) |
39b168b8 |
1199 | if (strncmp(g_eqs[i].name, name, namelen) == 0 |
1200 | && g_eqs[i].name[namelen] == 0) |
850c9265 |
1201 | break; |
87bf6cec |
1202 | if (i >= g_eqcnt) { |
1203 | if (po != NULL) |
1204 | ferr(po, "unresolved equ name: '%s'\n", name); |
1205 | return NULL; |
1206 | } |
850c9265 |
1207 | |
1208 | return &g_eqs[i]; |
1209 | } |
1210 | |
1cd4a663 |
1211 | static int is_stack_access(struct parsed_op *po, |
1212 | const struct parsed_opr *popr) |
850c9265 |
1213 | { |
1cd4a663 |
1214 | return (parse_stack_el(popr->name, NULL) |
1215 | || (g_bp_frame && !(po->flags & OPF_EBP_S) |
1216 | && IS_START(popr->name, "ebp"))); |
1217 | } |
1218 | |
1219 | static void parse_stack_access(struct parsed_op *po, |
1220 | const char *name, char *ofs_reg, int *offset_out, |
1221 | int *stack_ra_out, const char **bp_arg_out) |
1222 | { |
1223 | const char *bp_arg = ""; |
1224 | const char *p = NULL; |
91977a1c |
1225 | struct parsed_equ *eq; |
4f12f671 |
1226 | char *endp = NULL; |
d4e3b5db |
1227 | int stack_ra = 0; |
39b168b8 |
1228 | int offset = 0; |
91977a1c |
1229 | |
1cd4a663 |
1230 | ofs_reg[0] = 0; |
a3684be1 |
1231 | |
1232 | if (IS_START(name, "ebp-") |
1233 | || (IS_START(name, "ebp+") && '0' <= name[4] && name[4] <= '9')) |
1234 | { |
1235 | p = name + 4; |
1236 | if (IS_START(p, "0x")) |
1237 | p += 2; |
1238 | offset = strtoul(p, &endp, 16); |
1239 | if (name[3] == '-') |
1240 | offset = -offset; |
1241 | if (*endp != 0) |
1242 | ferr(po, "ebp- parse of '%s' failed\n", name); |
1243 | } |
1244 | else { |
4f12f671 |
1245 | bp_arg = parse_stack_el(name, ofs_reg); |
1246 | snprintf(g_comment, sizeof(g_comment), "%s", bp_arg); |
1247 | eq = equ_find(po, bp_arg, &offset); |
1248 | if (eq == NULL) |
1249 | ferr(po, "detected but missing eq\n"); |
1250 | offset += eq->offset; |
1251 | } |
39b168b8 |
1252 | |
d4e3b5db |
1253 | if (!strncmp(name, "ebp", 3)) |
1254 | stack_ra = 4; |
1255 | |
94d447fb |
1256 | if (ofs_reg[0] == 0 && stack_ra <= offset && offset < stack_ra + 4) |
39b168b8 |
1257 | ferr(po, "reference to ra? %d %d\n", offset, stack_ra); |
d4e3b5db |
1258 | |
1cd4a663 |
1259 | *offset_out = offset; |
1260 | *stack_ra_out = stack_ra; |
1261 | if (bp_arg_out) |
1262 | *bp_arg_out = bp_arg; |
1263 | } |
1264 | |
1265 | static void stack_frame_access(struct parsed_op *po, |
1266 | struct parsed_opr *popr, char *buf, size_t buf_size, |
1267 | const char *name, const char *cast, int is_src, int is_lea) |
1268 | { |
1269 | enum opr_lenmod tmp_lmod = OPLM_UNSPEC; |
1270 | const char *prefix = ""; |
1271 | const char *bp_arg = NULL; |
1272 | char ofs_reg[16] = { 0, }; |
1273 | int i, arg_i, arg_s; |
1274 | int unaligned = 0; |
1275 | int stack_ra = 0; |
1276 | int offset = 0; |
1277 | int sf_ofs; |
1278 | int lim; |
1279 | |
1280 | if (po->flags & OPF_EBP_S) |
1281 | ferr(po, "stack_frame_access while ebp is scratch\n"); |
1282 | |
1283 | parse_stack_access(po, name, ofs_reg, &offset, &stack_ra, &bp_arg); |
1284 | |
4f12f671 |
1285 | if (offset > stack_ra) |
1286 | { |
39b168b8 |
1287 | arg_i = (offset - stack_ra - 4) / 4; |
bd96f656 |
1288 | if (arg_i < 0 || arg_i >= g_func_pp->argc_stack) |
4f12f671 |
1289 | { |
bd96f656 |
1290 | if (g_func_pp->is_vararg |
1291 | && arg_i == g_func_pp->argc_stack && is_lea) |
1292 | { |
4f12f671 |
1293 | // should be va_list |
1294 | if (cast[0] == 0) |
1295 | cast = "(u32)"; |
1296 | snprintf(buf, buf_size, "%sap", cast); |
1297 | return; |
1298 | } |
1299 | ferr(po, "offset %d (%s,%d) doesn't map to any arg\n", |
1300 | offset, bp_arg, arg_i); |
1301 | } |
4c45fa73 |
1302 | if (ofs_reg[0] != 0) |
7ba45c34 |
1303 | ferr(po, "offset reg on arg access?\n"); |
91977a1c |
1304 | |
bd96f656 |
1305 | for (i = arg_s = 0; i < g_func_pp->argc; i++) { |
1306 | if (g_func_pp->arg[i].reg != NULL) |
91977a1c |
1307 | continue; |
1308 | if (arg_s == arg_i) |
1309 | break; |
1310 | arg_s++; |
1311 | } |
bd96f656 |
1312 | if (i == g_func_pp->argc) |
91977a1c |
1313 | ferr(po, "arg %d not in prototype?\n", arg_i); |
850c9265 |
1314 | |
bd96f656 |
1315 | popr->is_ptr = g_func_pp->arg[i].type.is_ptr; |
de50b98b |
1316 | |
1317 | switch (popr->lmod) |
7ba45c34 |
1318 | { |
1319 | case OPLM_BYTE: |
4f12f671 |
1320 | if (is_lea) |
1321 | ferr(po, "lea/byte to arg?\n"); |
7ba45c34 |
1322 | if (is_src && (offset & 3) == 0) |
a2c1d768 |
1323 | snprintf(buf, buf_size, "%sa%d", |
1324 | simplify_cast(cast, "(u8)"), i + 1); |
7ba45c34 |
1325 | else |
a2c1d768 |
1326 | snprintf(buf, buf_size, "%sBYTE%d(a%d)", |
1327 | cast, offset & 3, i + 1); |
7ba45c34 |
1328 | break; |
1329 | |
1330 | case OPLM_WORD: |
4f12f671 |
1331 | if (is_lea) |
1332 | ferr(po, "lea/word to arg?\n"); |
a3684be1 |
1333 | if (offset & 1) { |
1334 | unaligned = 1; |
1335 | if (!is_src) { |
1336 | if (offset & 2) |
1337 | ferr(po, "problematic arg store\n"); |
a2c1d768 |
1338 | snprintf(buf, buf_size, "%s((char *)&a%d + 1)", |
1339 | simplify_cast(cast, "*(u16 *)"), i + 1); |
a3684be1 |
1340 | } |
1341 | else |
1342 | ferr(po, "unaligned arg word load\n"); |
1343 | } |
1344 | else if (is_src && (offset & 2) == 0) |
a2c1d768 |
1345 | snprintf(buf, buf_size, "%sa%d", |
1346 | simplify_cast(cast, "(u16)"), i + 1); |
7ba45c34 |
1347 | else |
a2c1d768 |
1348 | snprintf(buf, buf_size, "%s%sWORD(a%d)", |
1349 | cast, (offset & 2) ? "HI" : "LO", i + 1); |
7ba45c34 |
1350 | break; |
1351 | |
1352 | case OPLM_DWORD: |
3ebea2cf |
1353 | if (cast[0]) |
1354 | prefix = cast; |
1355 | else if (is_src) |
1356 | prefix = "(u32)"; |
a3684be1 |
1357 | |
de50b98b |
1358 | if (offset & 3) { |
a3684be1 |
1359 | unaligned = 1; |
2b43685d |
1360 | if (is_lea) |
1361 | snprintf(buf, buf_size, "(u32)&a%d + %d", |
1362 | i + 1, offset & 3); |
a3684be1 |
1363 | else if (!is_src) |
1364 | ferr(po, "unaligned arg store\n"); |
1365 | else { |
1366 | // mov edx, [ebp+arg_4+2]; movsx ecx, dx |
2b43685d |
1367 | snprintf(buf, buf_size, "%s(a%d >> %d)", |
1368 | prefix, i + 1, (offset & 3) * 8); |
a3684be1 |
1369 | } |
de50b98b |
1370 | } |
1371 | else { |
1372 | snprintf(buf, buf_size, "%s%sa%d", |
1373 | prefix, is_lea ? "&" : "", i + 1); |
1374 | } |
7ba45c34 |
1375 | break; |
1376 | |
1377 | default: |
de50b98b |
1378 | ferr(po, "bp_arg bad lmod: %d\n", popr->lmod); |
7ba45c34 |
1379 | } |
1380 | |
a3684be1 |
1381 | if (unaligned) |
1382 | snprintf(g_comment, sizeof(g_comment), "%s unaligned", bp_arg); |
1383 | |
7ba45c34 |
1384 | // common problem |
bd96f656 |
1385 | guess_lmod_from_c_type(&tmp_lmod, &g_func_pp->arg[i].type); |
a2c1d768 |
1386 | if (tmp_lmod != OPLM_DWORD |
1387 | && (unaligned || (!is_src && tmp_lmod < popr->lmod))) |
1388 | { |
1389 | ferr(po, "bp_arg arg%d/w offset %d and type '%s' is too small\n", |
1390 | i + 1, offset, g_func_pp->arg[i].type.name); |
1391 | } |
46411e6c |
1392 | if (popr->is_ptr && popr->lmod != OPLM_DWORD) |
1393 | ferr(po, "bp_arg arg%d: non-dword ptr access\n", i + 1); |
91977a1c |
1394 | } |
4f12f671 |
1395 | else |
1396 | { |
1bafb621 |
1397 | if (g_stack_fsz == 0) |
1398 | ferr(po, "stack var access without stackframe\n"); |
a2c1d768 |
1399 | g_stack_frame_used = 1; |
850c9265 |
1400 | |
39b168b8 |
1401 | sf_ofs = g_stack_fsz + offset; |
de50b98b |
1402 | lim = (ofs_reg[0] != 0) ? -4 : 0; |
1403 | if (offset > 0 || sf_ofs < lim) |
39b168b8 |
1404 | ferr(po, "bp_stack offset %d/%d\n", offset, g_stack_fsz); |
850c9265 |
1405 | |
1406 | if (is_lea) |
33c35af6 |
1407 | prefix = "(u32)&"; |
3ebea2cf |
1408 | else |
1409 | prefix = cast; |
850c9265 |
1410 | |
de50b98b |
1411 | switch (popr->lmod) |
850c9265 |
1412 | { |
1413 | case OPLM_BYTE: |
7ba45c34 |
1414 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1415 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
850c9265 |
1416 | break; |
7ba45c34 |
1417 | |
850c9265 |
1418 | case OPLM_WORD: |
7ba45c34 |
1419 | if ((sf_ofs & 1) || ofs_reg[0] != 0) { |
1420 | // known unaligned or possibly unaligned |
1421 | strcat(g_comment, " unaligned"); |
1422 | if (prefix[0] == 0) |
1423 | prefix = "*(u16 *)&"; |
1424 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1425 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
1426 | break; |
1427 | } |
1428 | snprintf(buf, buf_size, "%ssf.w[%d]", prefix, sf_ofs / 2); |
850c9265 |
1429 | break; |
7ba45c34 |
1430 | |
850c9265 |
1431 | case OPLM_DWORD: |
7ba45c34 |
1432 | if ((sf_ofs & 3) || ofs_reg[0] != 0) { |
1433 | // known unaligned or possibly unaligned |
1434 | strcat(g_comment, " unaligned"); |
1435 | if (prefix[0] == 0) |
1436 | prefix = "*(u32 *)&"; |
1437 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
1438 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
1439 | break; |
1440 | } |
1441 | snprintf(buf, buf_size, "%ssf.d[%d]", prefix, sf_ofs / 4); |
850c9265 |
1442 | break; |
7ba45c34 |
1443 | |
850c9265 |
1444 | default: |
de50b98b |
1445 | ferr(po, "bp_stack bad lmod: %d\n", popr->lmod); |
850c9265 |
1446 | } |
91977a1c |
1447 | } |
1448 | } |
c36e914d |
1449 | |
89ff3147 |
1450 | static void check_func_pp(struct parsed_op *po, |
1451 | const struct parsed_proto *pp, const char *pfx) |
1452 | { |
1453 | if (pp->argc_reg != 0) { |
1454 | if (!g_allow_regfunc) |
1455 | ferr(po, "%s: reg arg in arg-call unhandled yet\n", pfx); |
1456 | if (pp->argc_stack > 0 && pp->argc_reg != 2) |
1457 | ferr(po, "%s: %d reg arg(s) with %d stack arg(s)\n", |
1458 | pfx, pp->argc_reg, pp->argc_stack); |
1459 | } |
1460 | } |
1461 | |
3ebea2cf |
1462 | static void check_label_read_ref(struct parsed_op *po, const char *name) |
1463 | { |
840257f6 |
1464 | const struct parsed_proto *pp; |
1465 | |
36595fd2 |
1466 | pp = proto_parse(g_fhdr, name, 0); |
840257f6 |
1467 | if (pp == NULL) |
1468 | ferr(po, "proto_parse failed for ref '%s'\n", name); |
1469 | |
89ff3147 |
1470 | if (pp->is_func) |
1471 | check_func_pp(po, pp, "ref"); |
3ebea2cf |
1472 | } |
1473 | |
91977a1c |
1474 | static char *out_src_opr(char *buf, size_t buf_size, |
3ebea2cf |
1475 | struct parsed_op *po, struct parsed_opr *popr, const char *cast, |
1476 | int is_lea) |
91977a1c |
1477 | { |
850c9265 |
1478 | char tmp1[256], tmp2[256]; |
1479 | char expr[256]; |
a2c1d768 |
1480 | char *p; |
850c9265 |
1481 | int ret; |
1482 | |
3ebea2cf |
1483 | if (cast == NULL) |
1484 | cast = ""; |
1485 | |
91977a1c |
1486 | switch (popr->type) { |
1487 | case OPT_REG: |
850c9265 |
1488 | if (is_lea) |
1489 | ferr(po, "lea from reg?\n"); |
1490 | |
91977a1c |
1491 | switch (popr->lmod) { |
1492 | case OPLM_DWORD: |
3ebea2cf |
1493 | snprintf(buf, buf_size, "%s%s", cast, opr_reg_p(po, popr)); |
91977a1c |
1494 | break; |
850c9265 |
1495 | case OPLM_WORD: |
a2c1d768 |
1496 | snprintf(buf, buf_size, "%s%s", |
1497 | simplify_cast(cast, "(u16)"), opr_reg_p(po, popr)); |
850c9265 |
1498 | break; |
1499 | case OPLM_BYTE: |
5101a5f9 |
1500 | if (popr->name[1] == 'h') // XXX.. |
a2c1d768 |
1501 | snprintf(buf, buf_size, "%s(%s >> 8)", |
1502 | simplify_cast(cast, "(u8)"), opr_reg_p(po, popr)); |
5101a5f9 |
1503 | else |
a2c1d768 |
1504 | snprintf(buf, buf_size, "%s%s", |
1505 | simplify_cast(cast, "(u8)"), opr_reg_p(po, popr)); |
850c9265 |
1506 | break; |
91977a1c |
1507 | default: |
1508 | ferr(po, "invalid src lmod: %d\n", popr->lmod); |
1509 | } |
1510 | break; |
850c9265 |
1511 | |
91977a1c |
1512 | case OPT_REGMEM: |
1cd4a663 |
1513 | if (is_stack_access(po, popr)) { |
de50b98b |
1514 | stack_frame_access(po, popr, buf, buf_size, |
3ebea2cf |
1515 | popr->name, cast, 1, is_lea); |
91977a1c |
1516 | break; |
1517 | } |
850c9265 |
1518 | |
1519 | strcpy(expr, popr->name); |
1520 | if (strchr(expr, '[')) { |
1521 | // special case: '[' can only be left for label[reg] form |
1522 | ret = sscanf(expr, "%[^[][%[^]]]", tmp1, tmp2); |
1523 | if (ret != 2) |
1524 | ferr(po, "parse failure for '%s'\n", expr); |
a2c1d768 |
1525 | if (tmp1[0] == '(') { |
1526 | // (off_4FFF50+3)[eax] |
1527 | p = strchr(tmp1 + 1, ')'); |
1528 | if (p == NULL || p[1] != 0) |
1529 | ferr(po, "parse failure (2) for '%s'\n", expr); |
1530 | *p = 0; |
1531 | memmove(tmp1, tmp1 + 1, strlen(tmp1)); |
1532 | } |
33c35af6 |
1533 | snprintf(expr, sizeof(expr), "(u32)&%s + %s", tmp1, tmp2); |
850c9265 |
1534 | } |
1535 | |
1536 | // XXX: do we need more parsing? |
1537 | if (is_lea) { |
1538 | snprintf(buf, buf_size, "%s", expr); |
1539 | break; |
1540 | } |
1541 | |
a2c1d768 |
1542 | snprintf(buf, buf_size, "%s(%s)", |
1543 | simplify_cast(cast, lmod_cast_u_ptr(po, popr->lmod)), expr); |
91977a1c |
1544 | break; |
850c9265 |
1545 | |
91977a1c |
1546 | case OPT_LABEL: |
3ebea2cf |
1547 | check_label_read_ref(po, popr->name); |
1548 | if (cast[0] == 0 && popr->is_ptr) |
1549 | cast = "(u32)"; |
2b43685d |
1550 | |
850c9265 |
1551 | if (is_lea) |
1552 | snprintf(buf, buf_size, "(u32)&%s", popr->name); |
2b43685d |
1553 | else if (popr->size_lt) |
1554 | snprintf(buf, buf_size, "%s%s%s%s", cast, |
1555 | lmod_cast_u_ptr(po, popr->lmod), |
1556 | popr->is_array ? "" : "&", |
1557 | popr->name); |
850c9265 |
1558 | else |
3ebea2cf |
1559 | snprintf(buf, buf_size, "%s%s%s", cast, popr->name, |
7ba45c34 |
1560 | popr->is_array ? "[0]" : ""); |
850c9265 |
1561 | break; |
1562 | |
1563 | case OPT_OFFSET: |
3ebea2cf |
1564 | check_label_read_ref(po, popr->name); |
1565 | if (cast[0] == 0) |
1566 | cast = "(u32)"; |
850c9265 |
1567 | if (is_lea) |
1568 | ferr(po, "lea an offset?\n"); |
3ebea2cf |
1569 | snprintf(buf, buf_size, "%s&%s", cast, popr->name); |
91977a1c |
1570 | break; |
850c9265 |
1571 | |
91977a1c |
1572 | case OPT_CONST: |
850c9265 |
1573 | if (is_lea) |
1574 | ferr(po, "lea from const?\n"); |
1575 | |
a2c1d768 |
1576 | printf_number(tmp1, sizeof(tmp1), popr->val); |
ddaf8bd7 |
1577 | if (popr->val == 0 && strchr(cast, '*')) |
1578 | snprintf(buf, buf_size, "NULL"); |
1579 | else |
1580 | snprintf(buf, buf_size, "%s%s", |
1581 | simplify_cast_num(cast, popr->val), tmp1); |
91977a1c |
1582 | break; |
850c9265 |
1583 | |
91977a1c |
1584 | default: |
1585 | ferr(po, "invalid src type: %d\n", popr->type); |
1586 | } |
1587 | |
1588 | return buf; |
1589 | } |
c36e914d |
1590 | |
de50b98b |
1591 | // note: may set is_ptr (we find that out late for ebp frame..) |
91977a1c |
1592 | static char *out_dst_opr(char *buf, size_t buf_size, |
1593 | struct parsed_op *po, struct parsed_opr *popr) |
1594 | { |
1595 | switch (popr->type) { |
1596 | case OPT_REG: |
1597 | switch (popr->lmod) { |
1598 | case OPLM_DWORD: |
1599 | snprintf(buf, buf_size, "%s", opr_reg_p(po, popr)); |
1600 | break; |
850c9265 |
1601 | case OPLM_WORD: |
1602 | // ugh.. |
1603 | snprintf(buf, buf_size, "LOWORD(%s)", opr_reg_p(po, popr)); |
1604 | break; |
1605 | case OPLM_BYTE: |
1606 | // ugh.. |
5101a5f9 |
1607 | if (popr->name[1] == 'h') // XXX.. |
1608 | snprintf(buf, buf_size, "BYTE1(%s)", opr_reg_p(po, popr)); |
1609 | else |
1610 | snprintf(buf, buf_size, "LOBYTE(%s)", opr_reg_p(po, popr)); |
850c9265 |
1611 | break; |
91977a1c |
1612 | default: |
1613 | ferr(po, "invalid dst lmod: %d\n", popr->lmod); |
1614 | } |
1615 | break; |
850c9265 |
1616 | |
1617 | case OPT_REGMEM: |
1cd4a663 |
1618 | if (is_stack_access(po, popr)) { |
de50b98b |
1619 | stack_frame_access(po, popr, buf, buf_size, |
3ebea2cf |
1620 | popr->name, "", 0, 0); |
850c9265 |
1621 | break; |
1622 | } |
1623 | |
3ebea2cf |
1624 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
850c9265 |
1625 | |
bfa4a6ee |
1626 | case OPT_LABEL: |
2b43685d |
1627 | if (popr->size_mismatch) |
1628 | snprintf(buf, buf_size, "%s%s%s", |
1629 | lmod_cast_u_ptr(po, popr->lmod), |
1630 | popr->is_array ? "" : "&", popr->name); |
1631 | else |
1632 | snprintf(buf, buf_size, "%s%s", popr->name, |
1633 | popr->is_array ? "[0]" : ""); |
bfa4a6ee |
1634 | break; |
1635 | |
91977a1c |
1636 | default: |
1637 | ferr(po, "invalid dst type: %d\n", popr->type); |
1638 | } |
1639 | |
1640 | return buf; |
1641 | } |
c36e914d |
1642 | |
3ebea2cf |
1643 | static char *out_src_opr_u32(char *buf, size_t buf_size, |
1644 | struct parsed_op *po, struct parsed_opr *popr) |
1645 | { |
1646 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
1647 | } |
1648 | |
69a3cdfc |
1649 | static enum parsed_flag_op split_cond(struct parsed_op *po, |
940e8e66 |
1650 | enum op_op op, int *is_inv) |
91977a1c |
1651 | { |
940e8e66 |
1652 | *is_inv = 0; |
91977a1c |
1653 | |
69a3cdfc |
1654 | switch (op) { |
1655 | case OP_JO: |
1656 | return PFO_O; |
1657 | case OP_JC: |
1658 | return PFO_C; |
1659 | case OP_JZ: |
1660 | return PFO_Z; |
1661 | case OP_JBE: |
1662 | return PFO_BE; |
1663 | case OP_JS: |
1664 | return PFO_S; |
1665 | case OP_JP: |
1666 | return PFO_P; |
1667 | case OP_JL: |
1668 | return PFO_L; |
1669 | case OP_JLE: |
1670 | return PFO_LE; |
1671 | |
91977a1c |
1672 | case OP_JNO: |
940e8e66 |
1673 | *is_inv = 1; |
69a3cdfc |
1674 | return PFO_O; |
91977a1c |
1675 | case OP_JNC: |
940e8e66 |
1676 | *is_inv = 1; |
69a3cdfc |
1677 | return PFO_C; |
91977a1c |
1678 | case OP_JNZ: |
940e8e66 |
1679 | *is_inv = 1; |
69a3cdfc |
1680 | return PFO_Z; |
1681 | case OP_JA: |
940e8e66 |
1682 | *is_inv = 1; |
69a3cdfc |
1683 | return PFO_BE; |
91977a1c |
1684 | case OP_JNS: |
940e8e66 |
1685 | *is_inv = 1; |
69a3cdfc |
1686 | return PFO_S; |
91977a1c |
1687 | case OP_JNP: |
940e8e66 |
1688 | *is_inv = 1; |
69a3cdfc |
1689 | return PFO_P; |
850c9265 |
1690 | case OP_JGE: |
940e8e66 |
1691 | *is_inv = 1; |
69a3cdfc |
1692 | return PFO_L; |
91977a1c |
1693 | case OP_JG: |
940e8e66 |
1694 | *is_inv = 1; |
69a3cdfc |
1695 | return PFO_LE; |
1696 | |
1697 | case OP_ADC: |
1698 | case OP_SBB: |
1699 | return PFO_C; |
1700 | |
91977a1c |
1701 | default: |
69a3cdfc |
1702 | ferr(po, "split_cond: bad op %d\n", op); |
1703 | return -1; |
91977a1c |
1704 | } |
1705 | } |
c36e914d |
1706 | |
91977a1c |
1707 | static void out_test_for_cc(char *buf, size_t buf_size, |
940e8e66 |
1708 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv, |
69a3cdfc |
1709 | enum opr_lenmod lmod, const char *expr) |
91977a1c |
1710 | { |
69a3cdfc |
1711 | const char *cast, *scast; |
91977a1c |
1712 | |
69a3cdfc |
1713 | cast = lmod_cast_u(po, lmod); |
1714 | scast = lmod_cast_s(po, lmod); |
1715 | |
1716 | switch (pfo) { |
1717 | case PFO_Z: |
87bf6cec |
1718 | case PFO_BE: // CF=1||ZF=1; CF=0 |
850c9265 |
1719 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1720 | cast, expr, is_inv ? "!=" : "=="); |
91977a1c |
1721 | break; |
850c9265 |
1722 | |
5101a5f9 |
1723 | case PFO_S: |
1724 | case PFO_L: // SF!=OF; OF=0 |
1725 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1726 | scast, expr, is_inv ? ">=" : "<"); |
5101a5f9 |
1727 | break; |
1728 | |
87bf6cec |
1729 | case PFO_LE: // ZF=1||SF!=OF; OF=0 |
69a3cdfc |
1730 | snprintf(buf, buf_size, "(%s%s %s 0)", |
940e8e66 |
1731 | scast, expr, is_inv ? ">" : "<="); |
850c9265 |
1732 | break; |
1733 | |
91977a1c |
1734 | default: |
69a3cdfc |
1735 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
91977a1c |
1736 | } |
1737 | } |
c36e914d |
1738 | |
850c9265 |
1739 | static void out_cmp_for_cc(char *buf, size_t buf_size, |
a2c1d768 |
1740 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv) |
850c9265 |
1741 | { |
a2c1d768 |
1742 | const char *cast, *scast, *cast_use; |
1743 | char buf1[256], buf2[256]; |
1744 | enum opr_lenmod lmod; |
1745 | |
1746 | if (po->operand[0].lmod != po->operand[1].lmod) |
1747 | ferr(po, "%s: lmod mismatch: %d %d\n", __func__, |
1748 | po->operand[0].lmod, po->operand[1].lmod); |
1749 | lmod = po->operand[0].lmod; |
850c9265 |
1750 | |
69a3cdfc |
1751 | cast = lmod_cast_u(po, lmod); |
1752 | scast = lmod_cast_s(po, lmod); |
850c9265 |
1753 | |
a2c1d768 |
1754 | switch (pfo) { |
1755 | case PFO_C: |
1756 | case PFO_Z: |
1757 | case PFO_BE: // !a |
1758 | cast_use = cast; |
1759 | break; |
1760 | |
1761 | case PFO_S: |
1762 | case PFO_L: // !ge |
1763 | case PFO_LE: |
1764 | cast_use = scast; |
1765 | break; |
1766 | |
1767 | default: |
1768 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
1769 | } |
1770 | |
1771 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], cast_use, 0); |
1772 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], cast_use, 0); |
1773 | |
69a3cdfc |
1774 | switch (pfo) { |
5101a5f9 |
1775 | case PFO_C: |
1776 | // note: must be unsigned compare |
a2c1d768 |
1777 | snprintf(buf, buf_size, "(%s %s %s)", |
1778 | buf1, is_inv ? ">=" : "<", buf2); |
5101a5f9 |
1779 | break; |
1780 | |
69a3cdfc |
1781 | case PFO_Z: |
a2c1d768 |
1782 | snprintf(buf, buf_size, "(%s %s %s)", |
1783 | buf1, is_inv ? "!=" : "==", buf2); |
850c9265 |
1784 | break; |
1785 | |
5101a5f9 |
1786 | case PFO_BE: // !a |
850c9265 |
1787 | // note: must be unsigned compare |
a2c1d768 |
1788 | snprintf(buf, buf_size, "(%s %s %s)", |
1789 | buf1, is_inv ? ">" : "<=", buf2); |
1790 | |
1791 | // annoying case |
1792 | if (is_inv && lmod == OPLM_BYTE |
1793 | && po->operand[1].type == OPT_CONST |
1794 | && po->operand[1].val == 0xff) |
1795 | { |
1796 | snprintf(g_comment, sizeof(g_comment), "if %s", buf); |
1797 | snprintf(buf, buf_size, "(0)"); |
1798 | } |
5101a5f9 |
1799 | break; |
1800 | |
1801 | // note: must be signed compare |
1802 | case PFO_S: |
1803 | snprintf(buf, buf_size, "(%s(%s - %s) %s 0)", |
a2c1d768 |
1804 | scast, buf1, buf2, is_inv ? ">=" : "<"); |
850c9265 |
1805 | break; |
1806 | |
5101a5f9 |
1807 | case PFO_L: // !ge |
a2c1d768 |
1808 | snprintf(buf, buf_size, "(%s %s %s)", |
1809 | buf1, is_inv ? ">=" : "<", buf2); |
850c9265 |
1810 | break; |
1811 | |
5101a5f9 |
1812 | case PFO_LE: |
a2c1d768 |
1813 | snprintf(buf, buf_size, "(%s %s %s)", |
1814 | buf1, is_inv ? ">" : "<=", buf2); |
5101a5f9 |
1815 | break; |
1816 | |
850c9265 |
1817 | default: |
a2c1d768 |
1818 | break; |
850c9265 |
1819 | } |
1820 | } |
1821 | |
69a3cdfc |
1822 | static void out_cmp_test(char *buf, size_t buf_size, |
940e8e66 |
1823 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv) |
69a3cdfc |
1824 | { |
1825 | char buf1[256], buf2[256], buf3[256]; |
1826 | |
1827 | if (po->op == OP_TEST) { |
1828 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
3ebea2cf |
1829 | out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[0]); |
69a3cdfc |
1830 | } |
1831 | else { |
3ebea2cf |
1832 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
1833 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
69a3cdfc |
1834 | snprintf(buf3, sizeof(buf3), "(%s & %s)", buf1, buf2); |
1835 | } |
940e8e66 |
1836 | out_test_for_cc(buf, buf_size, po, pfo, is_inv, |
69a3cdfc |
1837 | po->operand[0].lmod, buf3); |
1838 | } |
1839 | else if (po->op == OP_CMP) { |
a2c1d768 |
1840 | out_cmp_for_cc(buf, buf_size, po, pfo, is_inv); |
69a3cdfc |
1841 | } |
1842 | else |
1843 | ferr(po, "%s: unhandled op: %d\n", __func__, po->op); |
1844 | } |
1845 | |
850c9265 |
1846 | static void propagate_lmod(struct parsed_op *po, struct parsed_opr *popr1, |
91977a1c |
1847 | struct parsed_opr *popr2) |
1848 | { |
1849 | if (popr1->lmod == OPLM_UNSPEC && popr2->lmod == OPLM_UNSPEC) |
1850 | ferr(po, "missing lmod for both operands\n"); |
1851 | |
1852 | if (popr1->lmod == OPLM_UNSPEC) |
1853 | popr1->lmod = popr2->lmod; |
1854 | else if (popr2->lmod == OPLM_UNSPEC) |
1855 | popr2->lmod = popr1->lmod; |
a3684be1 |
1856 | else if (popr1->lmod != popr2->lmod) { |
1857 | if (popr1->type_from_var) { |
1858 | popr1->size_mismatch = 1; |
1859 | if (popr1->lmod < popr2->lmod) |
1860 | popr1->size_lt = 1; |
1861 | popr1->lmod = popr2->lmod; |
1862 | } |
1863 | else if (popr2->type_from_var) { |
1864 | popr2->size_mismatch = 1; |
1865 | if (popr2->lmod < popr1->lmod) |
1866 | popr2->size_lt = 1; |
1867 | popr2->lmod = popr1->lmod; |
1868 | } |
1869 | else |
1870 | ferr(po, "conflicting lmods: %d vs %d\n", |
1871 | popr1->lmod, popr2->lmod); |
1872 | } |
91977a1c |
1873 | } |
c36e914d |
1874 | |
850c9265 |
1875 | static const char *op_to_c(struct parsed_op *po) |
1876 | { |
1877 | switch (po->op) |
1878 | { |
1879 | case OP_ADD: |
5101a5f9 |
1880 | case OP_ADC: |
850c9265 |
1881 | return "+"; |
1882 | case OP_SUB: |
5101a5f9 |
1883 | case OP_SBB: |
850c9265 |
1884 | return "-"; |
1885 | case OP_AND: |
1886 | return "&"; |
1887 | case OP_OR: |
1888 | return "|"; |
1889 | case OP_XOR: |
1890 | return "^"; |
1891 | case OP_SHL: |
1892 | return "<<"; |
1893 | case OP_SHR: |
1894 | return ">>"; |
1895 | case OP_MUL: |
1896 | case OP_IMUL: |
1897 | return "*"; |
1898 | default: |
1899 | ferr(po, "op_to_c was supplied with %d\n", po->op); |
1900 | } |
1901 | } |
1902 | |
7ae48d73 |
1903 | static void op_set_clear_flag(struct parsed_op *po, |
1904 | enum op_flags flag_set, enum op_flags flag_clear) |
d4e3b5db |
1905 | { |
7ae48d73 |
1906 | po->flags |= flag_set; |
1907 | po->flags &= ~flag_clear; |
d4e3b5db |
1908 | } |
1909 | |
de50b98b |
1910 | // last op in stream - unconditional branch or ret |
1911 | #define LAST_OP(_i) ((ops[_i].flags & OPF_TAIL) \ |
1912 | || (ops[_i].flags & (OPF_JMP|OPF_CC)) == OPF_JMP) |
1913 | |
87bf6cec |
1914 | static int scan_for_pop(int i, int opcnt, const char *reg, |
d4e3b5db |
1915 | int magic, int depth, int *maxdepth, int do_flags) |
850c9265 |
1916 | { |
89ff3147 |
1917 | const struct parsed_proto *pp; |
87bf6cec |
1918 | struct parsed_op *po; |
1919 | int ret = 0; |
4c45fa73 |
1920 | int j; |
87bf6cec |
1921 | |
850c9265 |
1922 | for (; i < opcnt; i++) { |
87bf6cec |
1923 | po = &ops[i]; |
1924 | if (po->cc_scratch == magic) |
1925 | break; // already checked |
1926 | po->cc_scratch = magic; |
1927 | |
89ff3147 |
1928 | if (po->flags & OPF_TAIL) { |
1929 | if (po->op == OP_CALL) { |
1930 | pp = proto_parse(g_fhdr, po->operand[0].name, 0); |
1931 | if (pp != NULL && pp->is_noreturn) |
1932 | // no stack cleanup for noreturn |
1933 | return ret; |
1934 | } |
87bf6cec |
1935 | return -1; // deadend |
89ff3147 |
1936 | } |
87bf6cec |
1937 | |
1bafb621 |
1938 | if ((po->flags & OPF_RMD) |
de50b98b |
1939 | || (po->op == OP_PUSH && po->argnum != 0)) // arg push |
850c9265 |
1940 | continue; |
1941 | |
87bf6cec |
1942 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
4c45fa73 |
1943 | if (po->btj != NULL) { |
1944 | // jumptable |
da87ae38 |
1945 | for (j = 0; j < po->btj->count; j++) { |
4c45fa73 |
1946 | ret |= scan_for_pop(po->btj->d[j].bt_i, opcnt, reg, magic, |
1947 | depth, maxdepth, do_flags); |
1948 | if (ret < 0) |
1949 | return ret; // dead end |
1950 | } |
da87ae38 |
1951 | return ret; |
4c45fa73 |
1952 | } |
1953 | |
87bf6cec |
1954 | if (po->bt_i < 0) { |
1955 | ferr(po, "dead branch\n"); |
1956 | return -1; |
1957 | } |
850c9265 |
1958 | |
87bf6cec |
1959 | if (po->flags & OPF_CC) { |
d4e3b5db |
1960 | ret |= scan_for_pop(po->bt_i, opcnt, reg, magic, |
1961 | depth, maxdepth, do_flags); |
87bf6cec |
1962 | if (ret < 0) |
1963 | return ret; // dead end |
1964 | } |
1965 | else { |
1966 | i = po->bt_i - 1; |
1967 | } |
1968 | continue; |
1969 | } |
1970 | |
d4e3b5db |
1971 | if ((po->op == OP_POP || po->op == OP_PUSH) |
1972 | && po->operand[0].type == OPT_REG |
87bf6cec |
1973 | && IS(po->operand[0].name, reg)) |
1974 | { |
da87ae38 |
1975 | if (po->op == OP_PUSH && !(po->flags & OPF_FARG)) { |
d4e3b5db |
1976 | depth++; |
1977 | if (depth > *maxdepth) |
1978 | *maxdepth = depth; |
1979 | if (do_flags) |
7ae48d73 |
1980 | op_set_clear_flag(po, OPF_RSAVE, OPF_RMD); |
d4e3b5db |
1981 | } |
da87ae38 |
1982 | else if (po->op == OP_POP) { |
1983 | if (depth == 0) { |
1984 | if (do_flags) |
1985 | op_set_clear_flag(po, OPF_RMD, OPF_RSAVE); |
1986 | return 1; |
1987 | } |
1988 | else { |
1989 | depth--; |
1990 | if (depth < 0) // should not happen |
1991 | ferr(po, "fail with depth\n"); |
1992 | if (do_flags) |
1993 | op_set_clear_flag(po, OPF_RSAVE, OPF_RMD); |
1994 | } |
d4e3b5db |
1995 | } |
87bf6cec |
1996 | } |
850c9265 |
1997 | } |
1998 | |
87bf6cec |
1999 | return ret; |
850c9265 |
2000 | } |
2001 | |
69a3cdfc |
2002 | // scan for pop starting from 'ret' op (all paths) |
d4e3b5db |
2003 | static int scan_for_pop_ret(int i, int opcnt, const char *reg, |
2004 | int flag_set) |
850c9265 |
2005 | { |
2006 | int found = 0; |
2007 | int j; |
2008 | |
2009 | for (; i < opcnt; i++) { |
87bf6cec |
2010 | if (!(ops[i].flags & OPF_TAIL)) |
850c9265 |
2011 | continue; |
2012 | |
2013 | for (j = i - 1; j >= 0; j--) { |
69a3cdfc |
2014 | if (ops[j].flags & OPF_RMD) |
2015 | continue; |
2016 | if (ops[j].flags & OPF_JMP) |
850c9265 |
2017 | return -1; |
2018 | |
2019 | if (ops[j].op == OP_POP && ops[j].operand[0].type == OPT_REG |
2020 | && IS(ops[j].operand[0].name, reg)) |
2021 | { |
2022 | found = 1; |
d4e3b5db |
2023 | ops[j].flags |= flag_set; |
850c9265 |
2024 | break; |
2025 | } |
2026 | |
2027 | if (g_labels[j][0] != 0) |
2028 | return -1; |
2029 | } |
2030 | } |
2031 | |
2032 | return found ? 0 : -1; |
2033 | } |
2034 | |
1cd4a663 |
2035 | // is operand 'opr' modified by parsed_op 'po'? |
5101a5f9 |
2036 | static int is_opr_modified(const struct parsed_opr *opr, |
69a3cdfc |
2037 | const struct parsed_op *po) |
2038 | { |
89ff3147 |
2039 | int mask; |
2040 | |
69a3cdfc |
2041 | if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA)) |
2042 | return 0; |
2043 | |
89ff3147 |
2044 | if (opr->type == OPT_REG) { |
2045 | if (po->op == OP_CALL) { |
2046 | mask = (1 << xAX) | (1 << xCX) | (1 << xDX); |
2047 | if ((1 << opr->reg) & mask) |
2048 | return 1; |
2049 | else |
2050 | return 0; |
2051 | } |
2052 | |
2053 | if (po->operand[0].type == OPT_REG) { |
2054 | if (po->regmask_dst & (1 << opr->reg)) |
2055 | return 1; |
2056 | else |
2057 | return 0; |
2058 | } |
69a3cdfc |
2059 | } |
2060 | |
2061 | return IS(po->operand[0].name, opr->name); |
2062 | } |
2063 | |
5101a5f9 |
2064 | // is any operand of parsed_op 'po_test' modified by parsed_op 'po'? |
2065 | static int is_any_opr_modified(const struct parsed_op *po_test, |
89ff3147 |
2066 | const struct parsed_op *po, int c_mode) |
5101a5f9 |
2067 | { |
89ff3147 |
2068 | int mask; |
5101a5f9 |
2069 | int i; |
2070 | |
2071 | if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA)) |
2072 | return 0; |
2073 | |
de50b98b |
2074 | if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST) |
2075 | return 0; |
2076 | |
2077 | if ((po_test->regmask_src | po_test->regmask_dst) & po->regmask_dst) |
2078 | return 1; |
2079 | |
2080 | // in reality, it can wreck any register, but in decompiled C |
2b43685d |
2081 | // version it can only overwrite eax or edx:eax |
89ff3147 |
2082 | mask = (1 << xAX) | (1 << xDX); |
2083 | if (!c_mode) |
2084 | mask |= 1 << xCX; |
2085 | |
de50b98b |
2086 | if (po->op == OP_CALL |
89ff3147 |
2087 | && ((po_test->regmask_src | po_test->regmask_dst) & mask)) |
5101a5f9 |
2088 | return 1; |
2089 | |
2090 | for (i = 0; i < po_test->operand_cnt; i++) |
2091 | if (IS(po_test->operand[i].name, po->operand[0].name)) |
2092 | return 1; |
2093 | |
2094 | return 0; |
2095 | } |
2096 | |
940e8e66 |
2097 | // scan for any po_test operand modification in range given |
89ff3147 |
2098 | static int scan_for_mod(struct parsed_op *po_test, int i, int opcnt, |
2099 | int c_mode) |
69a3cdfc |
2100 | { |
2b43685d |
2101 | if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST) |
2102 | return -1; |
2103 | |
69a3cdfc |
2104 | for (; i < opcnt; i++) { |
89ff3147 |
2105 | if (is_any_opr_modified(po_test, &ops[i], c_mode)) |
69a3cdfc |
2106 | return i; |
2107 | } |
2108 | |
2109 | return -1; |
2110 | } |
2111 | |
940e8e66 |
2112 | // scan for po_test operand[0] modification in range given |
2113 | static int scan_for_mod_opr0(struct parsed_op *po_test, |
2114 | int i, int opcnt) |
2115 | { |
2116 | for (; i < opcnt; i++) { |
2117 | if (is_opr_modified(&po_test->operand[0], &ops[i])) |
2118 | return i; |
2119 | } |
2120 | |
2121 | return -1; |
2122 | } |
2123 | |
04f8a628 |
2124 | static int scan_for_flag_set(int i, int magic, int *branched, |
2125 | int *setters, int *setter_cnt) |
69a3cdfc |
2126 | { |
04f8a628 |
2127 | struct label_ref *lr; |
2b43685d |
2128 | int ret; |
de50b98b |
2129 | |
2130 | while (i >= 0) { |
04f8a628 |
2131 | if (ops[i].cc_scratch == magic) { |
2132 | ferr(&ops[i], "%s looped\n", __func__); |
2133 | return -1; |
2134 | } |
2135 | ops[i].cc_scratch = magic; |
2136 | |
de50b98b |
2137 | if (g_labels[i][0] != 0) { |
2b43685d |
2138 | *branched = 1; |
04f8a628 |
2139 | |
2140 | lr = &g_label_refs[i]; |
2141 | for (; lr->next; lr = lr->next) { |
2142 | ret = scan_for_flag_set(lr->i, magic, |
2143 | branched, setters, setter_cnt); |
2144 | if (ret < 0) |
2145 | return ret; |
2146 | } |
2147 | |
de50b98b |
2148 | if (i > 0 && LAST_OP(i - 1)) { |
94d447fb |
2149 | i = lr->i; |
de50b98b |
2150 | continue; |
2151 | } |
04f8a628 |
2152 | ret = scan_for_flag_set(lr->i, magic, |
2153 | branched, setters, setter_cnt); |
2b43685d |
2154 | if (ret < 0) |
2155 | return ret; |
de50b98b |
2156 | } |
2157 | i--; |
2158 | |
2b43685d |
2159 | if (ops[i].flags & OPF_FLAGS) { |
2160 | setters[*setter_cnt] = i; |
2161 | (*setter_cnt)++; |
2162 | return 0; |
2163 | } |
69a3cdfc |
2164 | |
2165 | if ((ops[i].flags & OPF_JMP) && !(ops[i].flags & OPF_CC)) |
2166 | return -1; |
69a3cdfc |
2167 | } |
2168 | |
2169 | return -1; |
2170 | } |
2171 | |
5101a5f9 |
2172 | // scan back for cdq, if anything modifies edx, fail |
2173 | static int scan_for_cdq_edx(int i) |
2174 | { |
cdfaeed7 |
2175 | while (i >= 0) { |
2176 | if (g_labels[i][0] != 0) { |
2177 | if (g_label_refs[i].next != NULL) |
2178 | return -1; |
2179 | if (i > 0 && LAST_OP(i - 1)) { |
2180 | i = g_label_refs[i].i; |
2181 | continue; |
2182 | } |
2183 | return -1; |
2184 | } |
2185 | i--; |
2186 | |
5101a5f9 |
2187 | if (ops[i].op == OP_CDQ) |
2188 | return i; |
2189 | |
2190 | if (ops[i].regmask_dst & (1 << xDX)) |
2191 | return -1; |
5101a5f9 |
2192 | } |
2193 | |
2194 | return -1; |
2195 | } |
2196 | |
64c59faf |
2197 | static int scan_for_reg_clear(int i, int reg) |
2198 | { |
cdfaeed7 |
2199 | while (i >= 0) { |
2200 | if (g_labels[i][0] != 0) { |
2201 | if (g_label_refs[i].next != NULL) |
2202 | return -1; |
2203 | if (i > 0 && LAST_OP(i - 1)) { |
2204 | i = g_label_refs[i].i; |
2205 | continue; |
2206 | } |
2207 | return -1; |
2208 | } |
2209 | i--; |
2210 | |
64c59faf |
2211 | if (ops[i].op == OP_XOR |
2212 | && ops[i].operand[0].lmod == OPLM_DWORD |
2213 | && ops[i].operand[0].reg == ops[i].operand[1].reg |
2214 | && ops[i].operand[0].reg == reg) |
2215 | return i; |
2216 | |
2217 | if (ops[i].regmask_dst & (1 << reg)) |
2218 | return -1; |
64c59faf |
2219 | } |
2220 | |
2221 | return -1; |
2222 | } |
2223 | |
1bafb621 |
2224 | // scan for positive, constant esp adjust |
2225 | static int scan_for_esp_adjust(int i, int opcnt, int *adj) |
2226 | { |
89ff3147 |
2227 | const struct parsed_proto *pp; |
7ba45c34 |
2228 | struct parsed_op *po; |
46411e6c |
2229 | int first_pop = -1; |
7ba45c34 |
2230 | *adj = 0; |
2231 | |
1bafb621 |
2232 | for (; i < opcnt; i++) { |
7ba45c34 |
2233 | po = &ops[i]; |
2234 | |
a2c1d768 |
2235 | if (g_labels[i][0] != 0) |
2236 | break; |
2237 | |
7ba45c34 |
2238 | if (po->op == OP_ADD && po->operand[0].reg == xSP) { |
2239 | if (po->operand[1].type != OPT_CONST) |
1bafb621 |
2240 | ferr(&ops[i], "non-const esp adjust?\n"); |
7ba45c34 |
2241 | *adj += po->operand[1].val; |
1bafb621 |
2242 | if (*adj & 3) |
2243 | ferr(&ops[i], "unaligned esp adjust: %x\n", *adj); |
2244 | return i; |
2245 | } |
46411e6c |
2246 | else if (po->op == OP_PUSH) { |
2247 | if (first_pop == -1) |
2248 | first_pop = -2; // none |
7ba45c34 |
2249 | *adj -= lmod_bytes(po, po->operand[0].lmod); |
46411e6c |
2250 | } |
2251 | else if (po->op == OP_POP) { |
2252 | if (first_pop == -1) |
2253 | first_pop = i; |
7ba45c34 |
2254 | *adj += lmod_bytes(po, po->operand[0].lmod); |
46411e6c |
2255 | } |
e56ab892 |
2256 | else if (po->flags & (OPF_JMP|OPF_TAIL)) { |
2257 | if (po->op != OP_CALL) |
a2c1d768 |
2258 | break; |
e56ab892 |
2259 | if (po->operand[0].type != OPT_LABEL) |
a2c1d768 |
2260 | break; |
89ff3147 |
2261 | pp = po->datap; |
2262 | if (pp != NULL && pp->is_stdcall) |
2263 | break; |
e56ab892 |
2264 | } |
a2c1d768 |
2265 | } |
7ba45c34 |
2266 | |
46411e6c |
2267 | if (*adj == 4 && first_pop >= 0 && ops[first_pop].op == OP_POP |
2268 | && ops[first_pop].operand[0].type == OPT_REG |
2269 | && ops[first_pop].operand[0].reg == xCX) |
a2c1d768 |
2270 | { |
2271 | // probably 'pop ecx' was used.. |
46411e6c |
2272 | return first_pop; |
1bafb621 |
2273 | } |
2274 | |
2275 | return -1; |
2276 | } |
2277 | |
a3684be1 |
2278 | static void scan_fwd_set_flags(int i, int opcnt, int magic, int flags) |
2279 | { |
2280 | struct parsed_op *po; |
2281 | int j; |
2282 | |
2283 | if (i < 0) |
2284 | ferr(ops, "%s: followed bad branch?\n", __func__); |
2285 | |
2286 | for (; i < opcnt; i++) { |
2287 | po = &ops[i]; |
2288 | if (po->cc_scratch == magic) |
2289 | return; |
2290 | po->cc_scratch = magic; |
2291 | po->flags |= flags; |
2292 | |
2293 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
2294 | if (po->btj != NULL) { |
2295 | // jumptable |
2296 | for (j = 0; j < po->btj->count; j++) |
2297 | scan_fwd_set_flags(po->btj->d[j].bt_i, opcnt, magic, flags); |
2298 | return; |
2299 | } |
2300 | |
2301 | scan_fwd_set_flags(po->bt_i, opcnt, magic, flags); |
2302 | if (!(po->flags & OPF_CC)) |
2303 | return; |
2304 | } |
2305 | if (po->flags & OPF_TAIL) |
2306 | return; |
2307 | } |
2308 | } |
2309 | |
1cd4a663 |
2310 | static const struct parsed_proto *try_recover_pp( |
da87ae38 |
2311 | struct parsed_op *po, const struct parsed_opr *opr, int *search_instead) |
1cd4a663 |
2312 | { |
2313 | const struct parsed_proto *pp = NULL; |
89ff3147 |
2314 | char buf[256]; |
2315 | char *p; |
1cd4a663 |
2316 | |
2317 | // maybe an arg of g_func? |
2318 | if (opr->type == OPT_REGMEM && is_stack_access(po, opr)) |
2319 | { |
2320 | char ofs_reg[16] = { 0, }; |
2321 | int arg, arg_s, arg_i; |
2322 | int stack_ra = 0; |
2323 | int offset = 0; |
2324 | |
2325 | parse_stack_access(po, opr->name, ofs_reg, |
2326 | &offset, &stack_ra, NULL); |
2327 | if (ofs_reg[0] != 0) |
2328 | ferr(po, "offset reg on arg access?\n"); |
da87ae38 |
2329 | if (offset <= stack_ra) { |
2330 | // search who set the stack var instead |
2331 | if (search_instead != NULL) |
2332 | *search_instead = 1; |
2333 | return NULL; |
2334 | } |
1cd4a663 |
2335 | |
2336 | arg_i = (offset - stack_ra - 4) / 4; |
2337 | for (arg = arg_s = 0; arg < g_func_pp->argc; arg++) { |
2338 | if (g_func_pp->arg[arg].reg != NULL) |
2339 | continue; |
2340 | if (arg_s == arg_i) |
2341 | break; |
2342 | arg_s++; |
2343 | } |
2344 | if (arg == g_func_pp->argc) |
2345 | ferr(po, "stack arg %d not in prototype?\n", arg_i); |
2346 | |
2347 | pp = g_func_pp->arg[arg].fptr; |
2348 | if (pp == NULL) |
46411e6c |
2349 | ferr(po, "icall sa: arg%d is not a fptr?\n", arg + 1); |
89ff3147 |
2350 | check_func_pp(po, pp, "icall arg"); |
2351 | } |
2352 | else if (opr->type == OPT_REGMEM && strchr(opr->name + 1, '[')) { |
2353 | // label[index] |
2354 | p = strchr(opr->name + 1, '['); |
2355 | memcpy(buf, opr->name, p - opr->name); |
2356 | buf[p - opr->name] = 0; |
2357 | pp = proto_parse(g_fhdr, buf, 0); |
1cd4a663 |
2358 | } |
2359 | else if (opr->type == OPT_OFFSET || opr->type == OPT_LABEL) { |
36595fd2 |
2360 | pp = proto_parse(g_fhdr, opr->name, 0); |
1cd4a663 |
2361 | if (pp == NULL) |
2362 | ferr(po, "proto_parse failed for icall from '%s'\n", opr->name); |
89ff3147 |
2363 | check_func_pp(po, pp, "reg-fptr ref"); |
1cd4a663 |
2364 | } |
2365 | |
2366 | return pp; |
2367 | } |
2368 | |
da87ae38 |
2369 | static void scan_for_call_type(int i, const struct parsed_opr *opr, |
89ff3147 |
2370 | int magic, const struct parsed_proto **pp_found, int *multi) |
1cd4a663 |
2371 | { |
2372 | const struct parsed_proto *pp = NULL; |
2373 | struct parsed_op *po; |
2374 | struct label_ref *lr; |
2375 | |
2376 | while (i >= 0) { |
2377 | if (ops[i].cc_scratch == magic) |
2378 | return; |
2379 | ops[i].cc_scratch = magic; |
2380 | |
2381 | if (g_labels[i][0] != 0) { |
2382 | lr = &g_label_refs[i]; |
2383 | for (; lr != NULL; lr = lr->next) |
89ff3147 |
2384 | scan_for_call_type(lr->i, opr, magic, pp_found, multi); |
46411e6c |
2385 | if (i > 0 && LAST_OP(i - 1)) |
2386 | return; |
1cd4a663 |
2387 | } |
2388 | i--; |
2389 | |
2390 | if (!(ops[i].flags & OPF_DATA)) |
2391 | continue; |
2392 | if (!is_opr_modified(opr, &ops[i])) |
2393 | continue; |
2394 | if (ops[i].op != OP_MOV && ops[i].op != OP_LEA) { |
2395 | // most probably trashed by some processing |
2396 | *pp_found = NULL; |
2397 | return; |
2398 | } |
2399 | |
2400 | opr = &ops[i].operand[1]; |
2401 | if (opr->type != OPT_REG) |
2402 | break; |
2403 | } |
2404 | |
2405 | po = (i >= 0) ? &ops[i] : ops; |
2406 | |
2407 | if (i < 0) { |
2408 | // reached the top - can only be an arg-reg |
2409 | if (opr->type != OPT_REG) |
2410 | return; |
2411 | |
2412 | for (i = 0; i < g_func_pp->argc; i++) { |
2413 | if (g_func_pp->arg[i].reg == NULL) |
2414 | continue; |
2415 | if (IS(opr->name, g_func_pp->arg[i].reg)) |
2416 | break; |
2417 | } |
2418 | if (i == g_func_pp->argc) |
2419 | return; |
2420 | pp = g_func_pp->arg[i].fptr; |
2421 | if (pp == NULL) |
46411e6c |
2422 | ferr(po, "icall: arg%d (%s) is not a fptr?\n", |
2423 | i + 1, g_func_pp->arg[i].reg); |
89ff3147 |
2424 | check_func_pp(po, pp, "icall reg-arg"); |
1cd4a663 |
2425 | } |
2426 | else |
da87ae38 |
2427 | pp = try_recover_pp(po, opr, NULL); |
1cd4a663 |
2428 | |
89ff3147 |
2429 | if (*pp_found != NULL && pp != NULL && *pp_found != pp) { |
1cd4a663 |
2430 | if (!IS((*pp_found)->ret_type.name, pp->ret_type.name) |
2431 | || (*pp_found)->is_stdcall != pp->is_stdcall |
89ff3147 |
2432 | || (*pp_found)->is_fptr != pp->is_fptr |
1cd4a663 |
2433 | || (*pp_found)->argc != pp->argc |
2434 | || (*pp_found)->argc_reg != pp->argc_reg |
2435 | || (*pp_found)->argc_stack != pp->argc_stack) |
2436 | { |
2437 | ferr(po, "icall: parsed_proto mismatch\n"); |
2438 | } |
89ff3147 |
2439 | *multi = 1; |
1cd4a663 |
2440 | } |
2441 | if (pp != NULL) |
2442 | *pp_found = pp; |
2443 | } |
2444 | |
89ff3147 |
2445 | static const struct parsed_proto *resolve_icall(int i, int opcnt, |
2446 | int *multi_src) |
1cd4a663 |
2447 | { |
2448 | const struct parsed_proto *pp = NULL; |
da87ae38 |
2449 | int search_advice = 0; |
1cd4a663 |
2450 | |
89ff3147 |
2451 | *multi_src = 0; |
2452 | |
1cd4a663 |
2453 | switch (ops[i].operand[0].type) { |
2454 | case OPT_REGMEM: |
2455 | case OPT_LABEL: |
2456 | case OPT_OFFSET: |
da87ae38 |
2457 | pp = try_recover_pp(&ops[i], &ops[i].operand[0], &search_advice); |
2458 | if (!search_advice) |
2459 | break; |
2460 | // fallthrough |
1cd4a663 |
2461 | default: |
89ff3147 |
2462 | scan_for_call_type(i, &ops[i].operand[0], i + opcnt * 9, &pp, |
2463 | multi_src); |
1cd4a663 |
2464 | break; |
2465 | } |
2466 | |
2467 | return pp; |
2468 | } |
2469 | |
89ff3147 |
2470 | static int collect_call_args_r(struct parsed_op *po, int i, |
75ad0378 |
2471 | struct parsed_proto *pp, int *regmask, int *save_arg_vars, int arg, |
a3684be1 |
2472 | int magic, int need_op_saving, int may_reuse) |
e56ab892 |
2473 | { |
2474 | struct parsed_proto *pp_tmp; |
2475 | struct label_ref *lr; |
2b43685d |
2476 | int need_to_save_current; |
e56ab892 |
2477 | int ret = 0; |
2478 | int j; |
2479 | |
a3684be1 |
2480 | if (i < 0) { |
a2c1d768 |
2481 | ferr(po, "dead label encountered\n"); |
a3684be1 |
2482 | return -1; |
2483 | } |
e56ab892 |
2484 | |
de50b98b |
2485 | for (; arg < pp->argc; arg++) |
e56ab892 |
2486 | if (pp->arg[arg].reg == NULL) |
2487 | break; |
a3684be1 |
2488 | magic = (magic & 0xffffff) | (arg << 24); |
e56ab892 |
2489 | |
89ff3147 |
2490 | for (j = i; j >= 0 && (arg < pp->argc || pp->is_unresolved); ) |
e56ab892 |
2491 | { |
a3684be1 |
2492 | if (((ops[j].cc_scratch ^ magic) & 0xffffff) == 0) { |
2493 | if (ops[j].cc_scratch != magic) { |
2494 | ferr(&ops[j], "arg collect hit same path with diff args for %s\n", |
2495 | pp->name); |
2496 | return -1; |
2497 | } |
2498 | // ok: have already been here |
2499 | return 0; |
2500 | } |
2501 | ops[j].cc_scratch = magic; |
2502 | |
a2c1d768 |
2503 | if (g_labels[j][0] != 0 && g_label_refs[j].i != -1) { |
e56ab892 |
2504 | lr = &g_label_refs[j]; |
2505 | if (lr->next != NULL) |
2506 | need_op_saving = 1; |
a652aa9f |
2507 | for (; lr->next; lr = lr->next) { |
2508 | if ((ops[lr->i].flags & (OPF_JMP|OPF_CC)) != OPF_JMP) |
2509 | may_reuse = 1; |
89ff3147 |
2510 | ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars, |
a3684be1 |
2511 | arg, magic, need_op_saving, may_reuse); |
2512 | if (ret < 0) |
2513 | return ret; |
a652aa9f |
2514 | } |
e56ab892 |
2515 | |
a652aa9f |
2516 | if ((ops[lr->i].flags & (OPF_JMP|OPF_CC)) != OPF_JMP) |
2517 | may_reuse = 1; |
de50b98b |
2518 | if (j > 0 && LAST_OP(j - 1)) { |
e56ab892 |
2519 | // follow last branch in reverse |
2520 | j = lr->i; |
2521 | continue; |
2522 | } |
2523 | need_op_saving = 1; |
89ff3147 |
2524 | ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars, |
a3684be1 |
2525 | arg, magic, need_op_saving, may_reuse); |
2526 | if (ret < 0) |
2527 | return ret; |
e56ab892 |
2528 | } |
2529 | j--; |
2530 | |
2531 | if (ops[j].op == OP_CALL) |
2532 | { |
89ff3147 |
2533 | if (pp->is_unresolved) |
2534 | break; |
2535 | |
e56ab892 |
2536 | pp_tmp = ops[j].datap; |
2537 | if (pp_tmp == NULL) |
7ae48d73 |
2538 | ferr(po, "arg collect hit unparsed call '%s'\n", |
2539 | ops[j].operand[0].name); |
a652aa9f |
2540 | if (may_reuse && pp_tmp->argc_stack > 0) |
de50b98b |
2541 | ferr(po, "arg collect %d/%d hit '%s' with %d stack args\n", |
2542 | arg, pp->argc, opr_name(&ops[j], 0), pp_tmp->argc_stack); |
e56ab892 |
2543 | } |
de50b98b |
2544 | else if (ops[j].op == OP_ADD && ops[j].operand[0].reg == xSP) { |
89ff3147 |
2545 | if (pp->is_unresolved) |
2546 | break; |
2547 | |
de50b98b |
2548 | ferr(po, "arg collect %d/%d hit esp adjust\n", |
2549 | arg, pp->argc); |
2550 | } |
2551 | else if (ops[j].op == OP_POP) { |
89ff3147 |
2552 | if (pp->is_unresolved) |
2553 | break; |
2554 | |
de50b98b |
2555 | ferr(po, "arg collect %d/%d hit pop\n", arg, pp->argc); |
2556 | } |
de50b98b |
2557 | else if ((ops[j].flags & (OPF_JMP|OPF_CC)) == (OPF_JMP|OPF_CC)) |
2558 | { |
89ff3147 |
2559 | if (pp->is_unresolved) |
2560 | break; |
2561 | |
a652aa9f |
2562 | may_reuse = 1; |
de50b98b |
2563 | } |
2564 | else if (ops[j].op == OP_PUSH && !(ops[j].flags & OPF_FARG)) |
e56ab892 |
2565 | { |
89ff3147 |
2566 | if (pp->is_unresolved && (ops[j].flags & OPF_RMD)) |
2567 | break; |
2568 | |
e56ab892 |
2569 | pp->arg[arg].datap = &ops[j]; |
2b43685d |
2570 | need_to_save_current = 0; |
e56ab892 |
2571 | if (!need_op_saving) { |
89ff3147 |
2572 | ret = scan_for_mod(&ops[j], j + 1, i, 1); |
2b43685d |
2573 | need_to_save_current = (ret >= 0); |
e56ab892 |
2574 | } |
2b43685d |
2575 | if (need_op_saving || need_to_save_current) { |
e56ab892 |
2576 | // mark this push as one that needs operand saving |
2577 | ops[j].flags &= ~OPF_RMD; |
de50b98b |
2578 | if (ops[j].argnum == 0) { |
2579 | ops[j].argnum = arg + 1; |
2580 | *save_arg_vars |= 1 << arg; |
2581 | } |
2582 | else if (ops[j].argnum < arg + 1) |
2583 | ferr(&ops[j], "argnum conflict (%d<%d) for '%s'\n", |
2584 | ops[j].argnum, arg + 1, pp->name); |
e56ab892 |
2585 | } |
de50b98b |
2586 | else if (ops[j].argnum == 0) |
e56ab892 |
2587 | ops[j].flags |= OPF_RMD; |
2588 | |
a652aa9f |
2589 | // some PUSHes are reused by different calls on other branches, |
de50b98b |
2590 | // but that can't happen if we didn't branch, so they |
2591 | // can be removed from future searches (handles nested calls) |
a652aa9f |
2592 | if (!may_reuse) |
de50b98b |
2593 | ops[j].flags |= OPF_FARG; |
2594 | |
da87ae38 |
2595 | ops[j].flags &= ~OPF_RSAVE; |
2596 | |
89ff3147 |
2597 | arg++; |
2598 | if (!pp->is_unresolved) { |
2599 | // next arg |
2600 | for (; arg < pp->argc; arg++) |
2601 | if (pp->arg[arg].reg == NULL) |
2602 | break; |
2603 | } |
a3684be1 |
2604 | magic = (magic & 0xffffff) | (arg << 24); |
75ad0378 |
2605 | |
2606 | // tracking reg usage |
2607 | if (ops[j].operand[0].type == OPT_REG) |
2608 | *regmask |= 1 << ops[j].operand[0].reg; |
e56ab892 |
2609 | } |
2610 | } |
2611 | |
2612 | if (arg < pp->argc) { |
2613 | ferr(po, "arg collect failed for '%s': %d/%d\n", |
2614 | pp->name, arg, pp->argc); |
89ff3147 |
2615 | return -1; |
e56ab892 |
2616 | } |
89ff3147 |
2617 | |
2618 | return arg; |
2619 | } |
2620 | |
2621 | static int collect_call_args(struct parsed_op *po, int i, |
2622 | struct parsed_proto *pp, int *regmask, int *save_arg_vars, |
2623 | int magic) |
2624 | { |
2625 | int ret; |
2626 | int a; |
2627 | |
2628 | ret = collect_call_args_r(po, i, pp, regmask, save_arg_vars, |
2629 | 0, magic, 0, 0); |
2630 | if (ret < 0) |
2631 | return ret; |
2632 | |
2633 | if (pp->is_unresolved) { |
2634 | pp->argc += ret; |
2635 | pp->argc_stack += ret; |
2636 | for (a = 0; a < pp->argc; a++) |
2637 | if (pp->arg[a].type.name == NULL) |
2638 | pp->arg[a].type.name = strdup("int"); |
2639 | } |
2640 | |
e56ab892 |
2641 | return ret; |
2642 | } |
2643 | |
89ff3147 |
2644 | static void pp_insert_reg_arg(struct parsed_proto *pp, const char *reg) |
2645 | { |
2646 | int i; |
2647 | |
2648 | for (i = 0; i < pp->argc; i++) |
2649 | if (pp->arg[i].reg == NULL) |
2650 | break; |
2651 | |
2652 | if (pp->argc_stack) |
2653 | memmove(&pp->arg[i + 1], &pp->arg[i], |
2654 | sizeof(pp->arg[0]) * pp->argc_stack); |
2655 | memset(&pp->arg[i], 0, sizeof(pp->arg[i])); |
2656 | pp->arg[i].reg = strdup(reg); |
2657 | pp->arg[i].type.name = strdup("int"); |
2658 | pp->argc++; |
2659 | pp->argc_reg++; |
2660 | } |
2661 | |
4c45fa73 |
2662 | static void add_label_ref(struct label_ref *lr, int op_i) |
2663 | { |
2664 | struct label_ref *lr_new; |
2665 | |
2666 | if (lr->i == -1) { |
2667 | lr->i = op_i; |
2668 | return; |
2669 | } |
2670 | |
2671 | lr_new = calloc(1, sizeof(*lr_new)); |
2672 | lr_new->i = op_i; |
a652aa9f |
2673 | lr_new->next = lr->next; |
4c45fa73 |
2674 | lr->next = lr_new; |
2675 | } |
2676 | |
04f8a628 |
2677 | static void output_std_flags(FILE *fout, struct parsed_op *po, |
2678 | int *pfomask, const char *dst_opr_text) |
2679 | { |
2680 | if (*pfomask & (1 << PFO_Z)) { |
2681 | fprintf(fout, "\n cond_z = (%s%s == 0);", |
2682 | lmod_cast_u(po, po->operand[0].lmod), dst_opr_text); |
2683 | *pfomask &= ~(1 << PFO_Z); |
2684 | } |
2685 | if (*pfomask & (1 << PFO_S)) { |
2686 | fprintf(fout, "\n cond_s = (%s%s < 0);", |
2687 | lmod_cast_s(po, po->operand[0].lmod), dst_opr_text); |
2688 | *pfomask &= ~(1 << PFO_S); |
2689 | } |
2690 | } |
2691 | |
91977a1c |
2692 | static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) |
2693 | { |
69a3cdfc |
2694 | struct parsed_op *po, *delayed_flag_op = NULL, *tmp_op; |
850c9265 |
2695 | struct parsed_opr *last_arith_dst = NULL; |
3ebea2cf |
2696 | char buf1[256], buf2[256], buf3[256], cast[64]; |
bd96f656 |
2697 | const struct parsed_proto *pp_c; |
ddaf8bd7 |
2698 | struct parsed_proto *pp, *pp_tmp; |
4c45fa73 |
2699 | struct parsed_data *pd; |
91977a1c |
2700 | const char *tmpname; |
940e8e66 |
2701 | enum parsed_flag_op pfo; |
69a3cdfc |
2702 | int save_arg_vars = 0; |
2703 | int cmp_result_vars = 0; |
87bf6cec |
2704 | int need_mul_var = 0; |
91977a1c |
2705 | int had_decl = 0; |
3ebea2cf |
2706 | int label_pending = 0; |
d4e3b5db |
2707 | int regmask_save = 0; |
91977a1c |
2708 | int regmask_arg = 0; |
a3684be1 |
2709 | int regmask_now = 0; |
ddaf8bd7 |
2710 | int regmask_init = 0; |
91977a1c |
2711 | int regmask = 0; |
940e8e66 |
2712 | int pfomask = 0; |
64c59faf |
2713 | int found = 0; |
d4e3b5db |
2714 | int depth = 0; |
91977a1c |
2715 | int no_output; |
4c45fa73 |
2716 | int i, j, l; |
69a3cdfc |
2717 | int dummy; |
91977a1c |
2718 | int arg; |
91977a1c |
2719 | int reg; |
2720 | int ret; |
2721 | |
1bafb621 |
2722 | g_bp_frame = g_sp_frame = g_stack_fsz = 0; |
a2c1d768 |
2723 | g_stack_frame_used = 0; |
91977a1c |
2724 | |
36595fd2 |
2725 | g_func_pp = proto_parse(fhdr, funcn, 0); |
bd96f656 |
2726 | if (g_func_pp == NULL) |
91977a1c |
2727 | ferr(ops, "proto_parse failed for '%s'\n", funcn); |
2728 | |
bd96f656 |
2729 | fprintf(fout, "%s ", g_func_pp->ret_type.name); |
54e763a1 |
2730 | if (g_func_pp->is_stdcall && g_func_pp->argc_reg == 0) |
2731 | fprintf(fout, "__stdcall "); |
e56ab892 |
2732 | if (g_ida_func_attr & IDAFA_NORETURN) |
2733 | fprintf(fout, "noreturn "); |
2734 | fprintf(fout, "%s(", funcn); |
54e763a1 |
2735 | |
bd96f656 |
2736 | for (i = 0; i < g_func_pp->argc; i++) { |
91977a1c |
2737 | if (i > 0) |
2738 | fprintf(fout, ", "); |
54e763a1 |
2739 | if (g_func_pp->arg[i].fptr != NULL) { |
2740 | // func pointer.. |
2741 | pp = g_func_pp->arg[i].fptr; |
2742 | fprintf(fout, "%s (", pp->ret_type.name); |
2743 | if (pp->is_stdcall && pp->argc_reg == 0) |
2744 | fprintf(fout, "__stdcall "); |
2745 | fprintf(fout, "*a%d)(", i + 1); |
2746 | for (j = 0; j < pp->argc; j++) { |
2747 | if (j > 0) |
2748 | fprintf(fout, ", "); |
2749 | if (pp->arg[j].fptr) |
2750 | ferr(ops, "nested fptr\n"); |
2751 | fprintf(fout, "%s", pp->arg[j].type.name); |
2752 | } |
2753 | fprintf(fout, ")"); |
2754 | } |
2755 | else { |
2756 | fprintf(fout, "%s a%d", g_func_pp->arg[i].type.name, i + 1); |
2757 | } |
89ff3147 |
2758 | if (g_func_pp->arg[i].reg != NULL) { |
2759 | reg = char_array_i(regs_r32, |
2760 | ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg); |
2761 | if (reg < 0) |
2762 | ferr(ops, "arg '%s' is not a reg?\n", g_func_pp->arg[i].reg); |
2763 | regmask_arg |= 1 << reg; |
2764 | } |
91977a1c |
2765 | } |
bd96f656 |
2766 | if (g_func_pp->is_vararg) { |
4f12f671 |
2767 | if (i > 0) |
2768 | fprintf(fout, ", "); |
2769 | fprintf(fout, "..."); |
2770 | } |
54e763a1 |
2771 | |
91977a1c |
2772 | fprintf(fout, ")\n{\n"); |
2773 | |
2774 | // pass1: |
1bafb621 |
2775 | // - handle ebp/esp frame, remove ops related to it |
91977a1c |
2776 | if (ops[0].op == OP_PUSH && IS(opr_name(&ops[0], 0), "ebp") |
2777 | && ops[1].op == OP_MOV |
2778 | && IS(opr_name(&ops[1], 0), "ebp") |
2779 | && IS(opr_name(&ops[1], 1), "esp")) |
2780 | { |
87bf6cec |
2781 | int ecx_push = 0; |
2782 | |
91977a1c |
2783 | g_bp_frame = 1; |
69a3cdfc |
2784 | ops[0].flags |= OPF_RMD; |
2785 | ops[1].flags |= OPF_RMD; |
4c45fa73 |
2786 | i = 2; |
91977a1c |
2787 | |
2788 | if (ops[2].op == OP_SUB && IS(opr_name(&ops[2], 0), "esp")) { |
1bafb621 |
2789 | g_stack_fsz = opr_const(&ops[2], 1); |
69a3cdfc |
2790 | ops[2].flags |= OPF_RMD; |
4c45fa73 |
2791 | i++; |
91977a1c |
2792 | } |
87bf6cec |
2793 | else { |
2794 | // another way msvc builds stack frame.. |
2795 | i = 2; |
2796 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
1bafb621 |
2797 | g_stack_fsz += 4; |
87bf6cec |
2798 | ops[i].flags |= OPF_RMD; |
2799 | ecx_push++; |
2800 | i++; |
2801 | } |
4c45fa73 |
2802 | // and another way.. |
2803 | if (i == 2 && ops[i].op == OP_MOV && ops[i].operand[0].reg == xAX |
2804 | && ops[i].operand[1].type == OPT_CONST |
2805 | && ops[i + 1].op == OP_CALL |
2806 | && IS(opr_name(&ops[i + 1], 0), "__alloca_probe")) |
2807 | { |
2808 | g_stack_fsz += ops[i].operand[1].val; |
2809 | ops[i].flags |= OPF_RMD; |
2810 | i++; |
2811 | ops[i].flags |= OPF_RMD; |
2812 | i++; |
2813 | } |
87bf6cec |
2814 | } |
91977a1c |
2815 | |
64c59faf |
2816 | found = 0; |
91977a1c |
2817 | do { |
2818 | for (; i < opcnt; i++) |
2819 | if (ops[i].op == OP_RET) |
2820 | break; |
64c59faf |
2821 | if (i == opcnt && (ops[i - 1].flags & OPF_JMP) && found) |
2822 | break; |
2823 | |
e56ab892 |
2824 | if (ops[i - 1].op == OP_POP && IS(opr_name(&ops[i - 1], 0), "ebp")) |
2825 | ops[i - 1].flags |= OPF_RMD; |
2826 | else if (!(g_ida_func_attr & IDAFA_NORETURN)) |
91977a1c |
2827 | ferr(&ops[i - 1], "'pop ebp' expected\n"); |
91977a1c |
2828 | |
1bafb621 |
2829 | if (g_stack_fsz != 0) { |
e56ab892 |
2830 | if (ops[i - 2].op == OP_MOV |
2831 | && IS(opr_name(&ops[i - 2], 0), "esp") |
2832 | && IS(opr_name(&ops[i - 2], 1), "ebp")) |
91977a1c |
2833 | { |
e56ab892 |
2834 | ops[i - 2].flags |= OPF_RMD; |
91977a1c |
2835 | } |
e56ab892 |
2836 | else if (!(g_ida_func_attr & IDAFA_NORETURN)) |
2837 | ferr(&ops[i - 2], "esp restore expected\n"); |
87bf6cec |
2838 | |
2839 | if (ecx_push && ops[i - 3].op == OP_POP |
2840 | && IS(opr_name(&ops[i - 3], 0), "ecx")) |
2841 | { |
2842 | ferr(&ops[i - 3], "unexpected ecx pop\n"); |
2843 | } |
91977a1c |
2844 | } |
87bf6cec |
2845 | |
64c59faf |
2846 | found = 1; |
91977a1c |
2847 | i++; |
2848 | } while (i < opcnt); |
2849 | } |
1bafb621 |
2850 | else { |
2851 | for (i = 0; i < opcnt; i++) { |
2852 | if (ops[i].op == OP_PUSH || (ops[i].flags & (OPF_JMP|OPF_TAIL))) |
2853 | break; |
2854 | if (ops[i].op == OP_SUB && ops[i].operand[0].reg == xSP |
2855 | && ops[i].operand[1].type == OPT_CONST) |
2856 | { |
2857 | g_sp_frame = 1; |
2858 | break; |
2859 | } |
2860 | } |
2861 | |
2862 | if (g_sp_frame) |
2863 | { |
2864 | g_stack_fsz = ops[i].operand[1].val; |
2865 | ops[i].flags |= OPF_RMD; |
2866 | |
2867 | i++; |
2868 | do { |
2869 | for (; i < opcnt; i++) |
2870 | if (ops[i].op == OP_RET) |
2871 | break; |
2872 | if (ops[i - 1].op != OP_ADD |
2873 | || !IS(opr_name(&ops[i - 1], 0), "esp") |
2874 | || ops[i - 1].operand[1].type != OPT_CONST |
2875 | || ops[i - 1].operand[1].val != g_stack_fsz) |
2876 | ferr(&ops[i - 1], "'add esp' expected\n"); |
2877 | ops[i - 1].flags |= OPF_RMD; |
2878 | |
2879 | i++; |
2880 | } while (i < opcnt); |
2881 | } |
2882 | } |
91977a1c |
2883 | |
2884 | // pass2: |
7ae48d73 |
2885 | // - parse calls with labels |
87bf6cec |
2886 | // - resolve all branches |
de50b98b |
2887 | for (i = 0; i < opcnt; i++) |
2888 | { |
87bf6cec |
2889 | po = &ops[i]; |
2890 | po->bt_i = -1; |
4c45fa73 |
2891 | po->btj = NULL; |
87bf6cec |
2892 | |
7ae48d73 |
2893 | if (po->flags & OPF_RMD) |
2894 | continue; |
2895 | |
2896 | if (po->op == OP_CALL) { |
ddaf8bd7 |
2897 | pp = NULL; |
2898 | |
7ae48d73 |
2899 | if (po->operand[0].type == OPT_LABEL) { |
2900 | tmpname = opr_name(po, 0); |
46411e6c |
2901 | if (IS_START(tmpname, "loc_")) |
2902 | ferr(po, "call to loc_*\n"); |
36595fd2 |
2903 | pp_c = proto_parse(fhdr, tmpname, 0); |
7ae48d73 |
2904 | if (pp_c == NULL) |
2905 | ferr(po, "proto_parse failed for call '%s'\n", tmpname); |
da87ae38 |
2906 | |
7ae48d73 |
2907 | pp = proto_clone(pp_c); |
2908 | my_assert_not(pp, NULL); |
ddaf8bd7 |
2909 | } |
2910 | else if (po->datap != NULL) { |
2911 | pp = calloc(1, sizeof(*pp)); |
2912 | my_assert_not(pp, NULL); |
2913 | |
2914 | ret = parse_protostr(po->datap, pp); |
2915 | if (ret < 0) |
2916 | ferr(po, "bad protostr supplied: %s\n", (char *)po->datap); |
2917 | free(po->datap); |
2918 | po->datap = NULL; |
2919 | } |
2920 | |
2921 | if (pp != NULL) { |
2922 | if (pp->is_fptr) |
2923 | check_func_pp(po, pp, "fptr var call"); |
2924 | if (pp->is_noreturn) |
2925 | po->flags |= OPF_TAIL; |
7ae48d73 |
2926 | po->datap = pp; |
2927 | } |
2928 | continue; |
2929 | } |
2930 | |
2931 | if (!(po->flags & OPF_JMP) || po->op == OP_RET) |
87bf6cec |
2932 | continue; |
2933 | |
4c45fa73 |
2934 | if (po->operand[0].type == OPT_REGMEM) { |
2935 | char *p = strchr(po->operand[0].name, '['); |
2936 | if (p == NULL) |
89ff3147 |
2937 | goto tailcall; |
4c45fa73 |
2938 | ret = p - po->operand[0].name; |
2939 | strncpy(buf1, po->operand[0].name, ret); |
2940 | buf1[ret] = 0; |
2941 | |
2942 | for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) { |
2943 | if (IS(g_func_pd[j].label, buf1)) { |
2944 | pd = &g_func_pd[j]; |
2945 | break; |
2946 | } |
2947 | } |
2948 | if (pd == NULL) |
840257f6 |
2949 | //ferr(po, "label '%s' not parsed?\n", buf1); |
2950 | goto tailcall; |
4c45fa73 |
2951 | if (pd->type != OPT_OFFSET) |
2952 | ferr(po, "label '%s' with non-offset data?\n", buf1); |
2953 | |
2954 | // find all labels, link |
2955 | for (j = 0; j < pd->count; j++) { |
2956 | for (l = 0; l < opcnt; l++) { |
2957 | if (g_labels[l][0] && IS(g_labels[l], pd->d[j].u.label)) { |
2958 | add_label_ref(&g_label_refs[l], i); |
2959 | pd->d[j].bt_i = l; |
2960 | break; |
2961 | } |
2962 | } |
2963 | } |
2964 | |
2965 | po->btj = pd; |
2966 | continue; |
2967 | } |
2968 | |
2969 | for (l = 0; l < opcnt; l++) { |
2970 | if (g_labels[l][0] && IS(po->operand[0].name, g_labels[l])) { |
2971 | add_label_ref(&g_label_refs[l], i); |
2972 | po->bt_i = l; |
87bf6cec |
2973 | break; |
2974 | } |
2975 | } |
2976 | |
4c45fa73 |
2977 | if (po->bt_i != -1) |
2978 | continue; |
2979 | |
840257f6 |
2980 | if (po->operand[0].type == OPT_LABEL) |
87bf6cec |
2981 | // assume tail call |
840257f6 |
2982 | goto tailcall; |
4c45fa73 |
2983 | |
2984 | ferr(po, "unhandled branch\n"); |
840257f6 |
2985 | |
2986 | tailcall: |
2987 | po->op = OP_CALL; |
2988 | po->flags |= OPF_TAIL; |
7ae48d73 |
2989 | i--; // reprocess |
87bf6cec |
2990 | } |
2991 | |
2992 | // pass3: |
a2c1d768 |
2993 | // - remove dead labels |
91977a1c |
2994 | // - process calls |
1bafb621 |
2995 | for (i = 0; i < opcnt; i++) |
2996 | { |
a2c1d768 |
2997 | if (g_labels[i][0] != 0 && g_label_refs[i].i == -1) |
2998 | g_labels[i][0] = 0; |
2999 | |
69a3cdfc |
3000 | po = &ops[i]; |
3001 | if (po->flags & OPF_RMD) |
91977a1c |
3002 | continue; |
850c9265 |
3003 | |
d4e3b5db |
3004 | if (po->op == OP_CALL) |
69a3cdfc |
3005 | { |
1bafb621 |
3006 | tmpname = opr_name(po, 0); |
7ae48d73 |
3007 | pp = po->datap; |
3008 | if (pp == NULL) |
1bafb621 |
3009 | { |
7ae48d73 |
3010 | // indirect call |
89ff3147 |
3011 | pp_c = resolve_icall(i, opcnt, &l); |
3012 | if (pp_c != NULL) { |
1cd4a663 |
3013 | pp = proto_clone(pp_c); |
89ff3147 |
3014 | my_assert_not(pp, NULL); |
3015 | if (l) |
3016 | // not resolved just to single func |
3017 | pp->is_fptr = 1; |
3018 | } |
1cd4a663 |
3019 | if (pp == NULL) { |
3020 | pp = calloc(1, sizeof(*pp)); |
3021 | my_assert_not(pp, NULL); |
89ff3147 |
3022 | pp->is_fptr = 1; |
1cd4a663 |
3023 | ret = scan_for_esp_adjust(i + 1, opcnt, &j); |
89ff3147 |
3024 | if (ret < 0) { |
3025 | if (!g_allow_regfunc) |
3026 | ferr(po, "non-__cdecl indirect call unhandled yet\n"); |
3027 | pp->is_unresolved = 1; |
3028 | j = 0; |
3029 | } |
1cd4a663 |
3030 | j /= 4; |
3031 | if (j > ARRAY_SIZE(pp->arg)) |
89ff3147 |
3032 | ferr(po, "esp adjust too large: %d\n", j); |
1cd4a663 |
3033 | pp->ret_type.name = strdup("int"); |
3034 | pp->argc = pp->argc_stack = j; |
3035 | for (arg = 0; arg < pp->argc; arg++) |
3036 | pp->arg[arg].type.name = strdup("int"); |
3037 | } |
7ae48d73 |
3038 | po->datap = pp; |
1bafb621 |
3039 | } |
3040 | |
7ba45c34 |
3041 | // look for and make use of esp adjust |
3042 | ret = -1; |
e56ab892 |
3043 | if (!pp->is_stdcall && pp->argc_stack > 0) |
7ba45c34 |
3044 | ret = scan_for_esp_adjust(i + 1, opcnt, &j); |
1bafb621 |
3045 | if (ret >= 0) { |
7ba45c34 |
3046 | if (pp->is_vararg) { |
3047 | if (j / 4 < pp->argc_stack) |
3048 | ferr(po, "esp adjust is too small: %x < %x\n", |
3049 | j, pp->argc_stack * 4); |
3050 | // modify pp to make it have varargs as normal args |
3051 | arg = pp->argc; |
3052 | pp->argc += j / 4 - pp->argc_stack; |
3053 | for (; arg < pp->argc; arg++) { |
3ebea2cf |
3054 | pp->arg[arg].type.name = strdup("int"); |
7ba45c34 |
3055 | pp->argc_stack++; |
3056 | } |
3057 | if (pp->argc > ARRAY_SIZE(pp->arg)) |
e56ab892 |
3058 | ferr(po, "too many args for '%s'\n", tmpname); |
7ba45c34 |
3059 | } |
1bafb621 |
3060 | if (pp->argc_stack != j / 4) |
e56ab892 |
3061 | ferr(po, "stack tracking failed for '%s': %x %x\n", |
3062 | tmpname, pp->argc_stack * 4, j); |
7ba45c34 |
3063 | |
1bafb621 |
3064 | ops[ret].flags |= OPF_RMD; |
7ba45c34 |
3065 | // a bit of a hack, but deals with use of |
3066 | // single adj for multiple calls |
3067 | ops[ret].operand[1].val -= j; |
1bafb621 |
3068 | } |
7ba45c34 |
3069 | else if (pp->is_vararg) |
3070 | ferr(po, "missing esp_adjust for vararg func '%s'\n", |
3071 | pp->name); |
91977a1c |
3072 | |
89ff3147 |
3073 | if (!pp->is_unresolved) { |
3074 | // since we know the args, collect them |
3075 | collect_call_args(po, i, pp, ®mask, &save_arg_vars, |
3076 | i + opcnt * 2); |
3077 | } |
2b43685d |
3078 | |
3079 | if (strstr(pp->ret_type.name, "int64")) |
3080 | need_mul_var = 1; |
91977a1c |
3081 | } |
d4e3b5db |
3082 | } |
3083 | |
3084 | // pass4: |
3085 | // - find POPs for PUSHes, rm both |
3086 | // - scan for all used registers |
3087 | // - find flag set ops for their users |
89ff3147 |
3088 | // - do unreselved calls |
1bafb621 |
3089 | // - declare indirect functions |
d4e3b5db |
3090 | for (i = 0; i < opcnt; i++) { |
3091 | po = &ops[i]; |
3092 | if (po->flags & OPF_RMD) |
3093 | continue; |
3094 | |
7ae48d73 |
3095 | if (po->op == OP_PUSH && (po->flags & OPF_RSAVE)) { |
3096 | reg = po->operand[0].reg; |
3097 | if (!(regmask & (1 << reg))) |
3098 | // not a reg save after all, rerun scan_for_pop |
3099 | po->flags &= ~OPF_RSAVE; |
3100 | else |
3101 | regmask_save |= 1 << reg; |
3102 | } |
3103 | |
d4e3b5db |
3104 | if (po->op == OP_PUSH |
de50b98b |
3105 | && po->argnum == 0 && !(po->flags & OPF_RSAVE) |
d4e3b5db |
3106 | && po->operand[0].type == OPT_REG) |
3107 | { |
3108 | reg = po->operand[0].reg; |
3109 | if (reg < 0) |
3110 | ferr(po, "reg not set for push?\n"); |
3111 | |
3112 | depth = 0; |
3113 | ret = scan_for_pop(i + 1, opcnt, |
a3684be1 |
3114 | po->operand[0].name, i + opcnt * 3, 0, &depth, 0); |
d4e3b5db |
3115 | if (ret == 1) { |
3116 | if (depth > 1) |
3117 | ferr(po, "too much depth: %d\n", depth); |
d4e3b5db |
3118 | |
3119 | po->flags |= OPF_RMD; |
3120 | scan_for_pop(i + 1, opcnt, po->operand[0].name, |
a3684be1 |
3121 | i + opcnt * 4, 0, &depth, 1); |
d4e3b5db |
3122 | continue; |
3123 | } |
3124 | ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, 0); |
3125 | if (ret == 0) { |
3126 | arg = OPF_RMD; |
3127 | if (regmask & (1 << reg)) { |
3128 | if (regmask_save & (1 << reg)) |
3129 | ferr(po, "%s already saved?\n", po->operand[0].name); |
3130 | arg = OPF_RSAVE; |
3131 | } |
3132 | po->flags |= arg; |
3133 | scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, arg); |
3134 | continue; |
3135 | } |
3136 | } |
3137 | |
a3684be1 |
3138 | regmask_now = po->regmask_src | po->regmask_dst; |
3139 | if (regmask_now & (1 << xBP)) { |
3140 | if (g_bp_frame && !(po->flags & OPF_EBP_S)) { |
3141 | if (po->regmask_dst & (1 << xBP)) |
3142 | // compiler decided to drop bp frame and use ebp as scratch |
3143 | scan_fwd_set_flags(i, opcnt, i + opcnt * 5, OPF_EBP_S); |
3144 | else |
3145 | regmask_now &= ~(1 << xBP); |
3146 | } |
3147 | } |
3148 | |
3149 | regmask |= regmask_now; |
d4e3b5db |
3150 | |
3151 | if (po->flags & OPF_CC) |
3152 | { |
2b43685d |
3153 | int setters[16], cnt = 0, branched = 0; |
3154 | |
04f8a628 |
3155 | ret = scan_for_flag_set(i, i + opcnt * 6, |
3156 | &branched, setters, &cnt); |
2b43685d |
3157 | if (ret < 0 || cnt <= 0) |
3158 | ferr(po, "unable to trace flag setter(s)\n"); |
3159 | if (cnt > ARRAY_SIZE(setters)) |
3160 | ferr(po, "too many flag setters\n"); |
d4e3b5db |
3161 | |
d4e3b5db |
3162 | pfo = split_cond(po, po->op, &dummy); |
2b43685d |
3163 | for (j = 0; j < cnt; j++) |
3164 | { |
3165 | tmp_op = &ops[setters[j]]; // flag setter |
3166 | pfomask = 0; |
3167 | |
3168 | // to get nicer code, we try to delay test and cmp; |
3169 | // if we can't because of operand modification, or if we |
3170 | // have math op, or branch, make it calculate flags explicitly |
3171 | if (tmp_op->op == OP_TEST || tmp_op->op == OP_CMP) { |
89ff3147 |
3172 | if (branched || scan_for_mod(tmp_op, setters[j] + 1, i, 0) >= 0) |
2b43685d |
3173 | pfomask = 1 << pfo; |
3174 | } |
3175 | else if (tmp_op->op == OP_CMPS) { |
3176 | pfomask = 1 << PFO_Z; |
3177 | } |
3178 | else { |
04f8a628 |
3179 | // see if we'll be able to handle based on op result |
3180 | if ((tmp_op->op != OP_AND && tmp_op->op != OP_OR |
3181 | && pfo != PFO_Z && pfo != PFO_S && pfo != PFO_P) |
3182 | || branched |
2b43685d |
3183 | || scan_for_mod_opr0(tmp_op, setters[j] + 1, i) >= 0) |
3184 | pfomask = 1 << pfo; |
3185 | } |
3186 | if (pfomask) { |
3187 | tmp_op->pfomask |= pfomask; |
3188 | cmp_result_vars |= pfomask; |
2b43685d |
3189 | } |
04f8a628 |
3190 | // note: may overwrite, currently not a problem |
3191 | po->datap = tmp_op; |
d4e3b5db |
3192 | } |
3193 | |
3194 | if (po->op == OP_ADC || po->op == OP_SBB) |
3195 | cmp_result_vars |= 1 << PFO_C; |
3196 | } |
87bf6cec |
3197 | else if (po->op == OP_MUL |
3198 | || (po->op == OP_IMUL && po->operand_cnt == 1)) |
3199 | { |
3200 | need_mul_var = 1; |
3201 | } |
89ff3147 |
3202 | else if (po->op == OP_CALL) { |
1bafb621 |
3203 | pp = po->datap; |
89ff3147 |
3204 | if (pp == NULL) |
3205 | ferr(po, "NULL pp\n"); |
3206 | |
3207 | if (pp->is_unresolved) { |
ddaf8bd7 |
3208 | int regmask_stack = 0; |
3209 | collect_call_args(po, i, pp, ®mask_stack, &save_arg_vars, |
89ff3147 |
3210 | i + opcnt * 2); |
3211 | |
ddaf8bd7 |
3212 | if (!((regmask_stack & (1 << xCX)) |
3213 | && (regmask_stack & (1 << xDX)))) |
89ff3147 |
3214 | { |
3215 | if (pp->argc_stack != 0 |
3216 | || ((regmask | regmask_arg) & (1 << xCX))) |
3217 | { |
3218 | pp_insert_reg_arg(pp, "ecx"); |
ddaf8bd7 |
3219 | regmask_init |= 1 << xCX; |
89ff3147 |
3220 | regmask |= 1 << xCX; |
3221 | } |
3222 | if (pp->argc_stack != 0 |
3223 | || ((regmask | regmask_arg) & (1 << xDX))) |
3224 | { |
3225 | pp_insert_reg_arg(pp, "edx"); |
ddaf8bd7 |
3226 | regmask_init |= 1 << xDX; |
89ff3147 |
3227 | regmask |= 1 << xDX; |
3228 | } |
3229 | } |
ddaf8bd7 |
3230 | regmask |= regmask_stack; |
3231 | } |
3232 | |
3233 | for (arg = 0; arg < pp->argc; arg++) { |
3234 | if (pp->arg[arg].reg != NULL) { |
3235 | reg = char_array_i(regs_r32, |
3236 | ARRAY_SIZE(regs_r32), pp->arg[arg].reg); |
3237 | if (reg < 0) |
3238 | ferr(ops, "arg '%s' is not a reg?\n", pp->arg[arg].reg); |
3239 | if (!(regmask & (1 << reg))) { |
3240 | regmask_init |= 1 << reg; |
3241 | regmask |= 1 << reg; |
3242 | } |
3243 | } |
89ff3147 |
3244 | } |
3245 | |
3246 | if (pp->is_fptr) { |
ddaf8bd7 |
3247 | if (pp->name[0] != 0) { |
3248 | memmove(pp->name + 2, pp->name, strlen(pp->name) + 1); |
3249 | memcpy(pp->name, "i_", 2); |
3250 | |
3251 | // might be declared already |
3252 | found = 0; |
3253 | for (j = 0; j < i; j++) { |
3254 | if (ops[j].op == OP_CALL && (pp_tmp = ops[j].datap)) { |
3255 | if (pp_tmp->is_fptr && IS(pp->name, pp_tmp->name)) { |
3256 | found = 1; |
3257 | break; |
3258 | } |
3259 | } |
3260 | } |
3261 | if (found) |
3262 | continue; |
3263 | } |
3264 | else |
3265 | snprintf(pp->name, sizeof(pp->name), "icall%d", i); |
3266 | |
89ff3147 |
3267 | fprintf(fout, " %s (", pp->ret_type.name); |
3268 | if (pp->is_stdcall && pp->argc_reg == 0) |
3269 | fprintf(fout, "__stdcall "); |
ddaf8bd7 |
3270 | fprintf(fout, "*%s)(", pp->name); |
89ff3147 |
3271 | for (j = 0; j < pp->argc; j++) { |
3272 | if (j > 0) |
3273 | fprintf(fout, ", "); |
3274 | fprintf(fout, "%s a%d", pp->arg[j].type.name, j + 1); |
3275 | } |
3276 | fprintf(fout, ");\n"); |
1bafb621 |
3277 | } |
1bafb621 |
3278 | } |
75ad0378 |
3279 | else if (po->op == OP_RET && !IS(g_func_pp->ret_type.name, "void")) |
3280 | regmask |= 1 << xAX; |
91977a1c |
3281 | } |
3282 | |
da87ae38 |
3283 | // pass4: |
3284 | // - confirm regmask_save, it might have been reduced |
3285 | if (regmask_save != 0) |
3286 | { |
3287 | regmask_save = 0; |
3288 | for (i = 0; i < opcnt; i++) { |
3289 | po = &ops[i]; |
3290 | if (po->flags & OPF_RMD) |
3291 | continue; |
3292 | |
3293 | if (po->op == OP_PUSH && (po->flags & OPF_RSAVE)) |
3294 | regmask_save |= 1 << po->operand[0].reg; |
3295 | } |
3296 | } |
3297 | |
3298 | |
4c45fa73 |
3299 | // output LUTs/jumptables |
3300 | for (i = 0; i < g_func_pd_cnt; i++) { |
3301 | pd = &g_func_pd[i]; |
3302 | fprintf(fout, " static const "); |
3303 | if (pd->type == OPT_OFFSET) { |
3304 | fprintf(fout, "void *jt_%s[] =\n { ", pd->label); |
3305 | |
3306 | for (j = 0; j < pd->count; j++) { |
3307 | if (j > 0) |
3308 | fprintf(fout, ", "); |
3309 | fprintf(fout, "&&%s", pd->d[j].u.label); |
3310 | } |
3311 | } |
3312 | else { |
3313 | fprintf(fout, "%s %s[] =\n { ", |
3314 | lmod_type_u(ops, pd->lmod), pd->label); |
3315 | |
3316 | for (j = 0; j < pd->count; j++) { |
3317 | if (j > 0) |
3318 | fprintf(fout, ", "); |
3319 | fprintf(fout, "%u", pd->d[j].u.val); |
3320 | } |
3321 | } |
3322 | fprintf(fout, " };\n"); |
3323 | } |
3324 | |
4f12f671 |
3325 | // declare stack frame, va_arg |
1bafb621 |
3326 | if (g_stack_fsz) |
850c9265 |
3327 | fprintf(fout, " union { u32 d[%d]; u16 w[%d]; u8 b[%d]; } sf;\n", |
1bafb621 |
3328 | (g_stack_fsz + 3) / 4, (g_stack_fsz + 1) / 2, g_stack_fsz); |
850c9265 |
3329 | |
bd96f656 |
3330 | if (g_func_pp->is_vararg) |
4f12f671 |
3331 | fprintf(fout, " va_list ap;\n"); |
3332 | |
940e8e66 |
3333 | // declare arg-registers |
bd96f656 |
3334 | for (i = 0; i < g_func_pp->argc; i++) { |
3335 | if (g_func_pp->arg[i].reg != NULL) { |
91977a1c |
3336 | reg = char_array_i(regs_r32, |
bd96f656 |
3337 | ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg); |
75ad0378 |
3338 | if (regmask & (1 << reg)) { |
3339 | fprintf(fout, " u32 %s = (u32)a%d;\n", |
3340 | g_func_pp->arg[i].reg, i + 1); |
3341 | } |
3342 | else |
3343 | fprintf(fout, " // %s = a%d; // unused\n", |
3344 | g_func_pp->arg[i].reg, i + 1); |
91977a1c |
3345 | had_decl = 1; |
3346 | } |
3347 | } |
3348 | |
75ad0378 |
3349 | regmask_now = regmask & ~regmask_arg; |
3350 | regmask_now &= ~(1 << xSP); |
3351 | if (regmask_now) { |
91977a1c |
3352 | for (reg = 0; reg < 8; reg++) { |
75ad0378 |
3353 | if (regmask_now & (1 << reg)) { |
ddaf8bd7 |
3354 | fprintf(fout, " u32 %s", regs_r32[reg]); |
3355 | if (regmask_init & (1 << reg)) |
3356 | fprintf(fout, " = 0"); |
3357 | fprintf(fout, ";\n"); |
91977a1c |
3358 | had_decl = 1; |
3359 | } |
3360 | } |
3361 | } |
3362 | |
d4e3b5db |
3363 | if (regmask_save) { |
3364 | for (reg = 0; reg < 8; reg++) { |
3365 | if (regmask_save & (1 << reg)) { |
3366 | fprintf(fout, " u32 s_%s;\n", regs_r32[reg]); |
3367 | had_decl = 1; |
3368 | } |
3369 | } |
3370 | } |
3371 | |
69a3cdfc |
3372 | if (save_arg_vars) { |
3373 | for (reg = 0; reg < 32; reg++) { |
3374 | if (save_arg_vars & (1 << reg)) { |
3375 | fprintf(fout, " u32 s_a%d;\n", reg + 1); |
3376 | had_decl = 1; |
3377 | } |
3378 | } |
3379 | } |
3380 | |
3381 | if (cmp_result_vars) { |
3382 | for (i = 0; i < 8; i++) { |
3383 | if (cmp_result_vars & (1 << i)) { |
3384 | fprintf(fout, " u32 cond_%s;\n", parsed_flag_op_names[i]); |
3385 | had_decl = 1; |
3386 | } |
3387 | } |
3388 | } |
3389 | |
87bf6cec |
3390 | if (need_mul_var) { |
3391 | fprintf(fout, " u64 mul_tmp;\n"); |
3392 | had_decl = 1; |
3393 | } |
3394 | |
91977a1c |
3395 | if (had_decl) |
3396 | fprintf(fout, "\n"); |
3397 | |
bd96f656 |
3398 | if (g_func_pp->is_vararg) { |
3399 | if (g_func_pp->argc_stack == 0) |
4f12f671 |
3400 | ferr(ops, "vararg func without stack args?\n"); |
bd96f656 |
3401 | fprintf(fout, " va_start(ap, a%d);\n", g_func_pp->argc); |
4f12f671 |
3402 | } |
3403 | |
91977a1c |
3404 | // output ops |
69a3cdfc |
3405 | for (i = 0; i < opcnt; i++) |
3406 | { |
a2c1d768 |
3407 | if (g_labels[i][0] != 0) { |
91977a1c |
3408 | fprintf(fout, "\n%s:\n", g_labels[i]); |
3ebea2cf |
3409 | label_pending = 1; |
2b43685d |
3410 | |
3411 | delayed_flag_op = NULL; |
3412 | last_arith_dst = NULL; |
3ebea2cf |
3413 | } |
91977a1c |
3414 | |
69a3cdfc |
3415 | po = &ops[i]; |
3416 | if (po->flags & OPF_RMD) |
91977a1c |
3417 | continue; |
3418 | |
3419 | no_output = 0; |
3420 | |
91977a1c |
3421 | #define assert_operand_cnt(n_) \ |
850c9265 |
3422 | if (po->operand_cnt != n_) \ |
3423 | ferr(po, "operand_cnt is %d/%d\n", po->operand_cnt, n_) |
3424 | |
69a3cdfc |
3425 | // conditional/flag using op? |
3426 | if (po->flags & OPF_CC) |
850c9265 |
3427 | { |
940e8e66 |
3428 | int is_delayed = 0; |
3429 | int is_inv = 0; |
69a3cdfc |
3430 | |
940e8e66 |
3431 | pfo = split_cond(po, po->op, &is_inv); |
04f8a628 |
3432 | tmp_op = po->datap; |
850c9265 |
3433 | |
69a3cdfc |
3434 | // we go through all this trouble to avoid using parsed_flag_op, |
3435 | // which makes generated code much nicer |
3436 | if (delayed_flag_op != NULL) |
850c9265 |
3437 | { |
940e8e66 |
3438 | out_cmp_test(buf1, sizeof(buf1), delayed_flag_op, pfo, is_inv); |
3439 | is_delayed = 1; |
91977a1c |
3440 | } |
850c9265 |
3441 | else if (last_arith_dst != NULL |
04f8a628 |
3442 | && (pfo == PFO_Z || pfo == PFO_S || pfo == PFO_P |
3443 | || (tmp_op && (tmp_op->op == OP_AND || tmp_op->op == OP_OR)) |
3444 | )) |
850c9265 |
3445 | { |
3ebea2cf |
3446 | out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst); |
940e8e66 |
3447 | out_test_for_cc(buf1, sizeof(buf1), po, pfo, is_inv, |
850c9265 |
3448 | last_arith_dst->lmod, buf3); |
940e8e66 |
3449 | is_delayed = 1; |
850c9265 |
3450 | } |
04f8a628 |
3451 | else if (tmp_op != NULL) { |
7ba45c34 |
3452 | // use preprocessed flag calc results |
04f8a628 |
3453 | if (!(tmp_op->pfomask & (1 << pfo))) |
69a3cdfc |
3454 | ferr(po, "not prepared for pfo %d\n", pfo); |
3455 | |
940e8e66 |
3456 | // note: is_inv was not yet applied |
69a3cdfc |
3457 | snprintf(buf1, sizeof(buf1), "(%scond_%s)", |
940e8e66 |
3458 | is_inv ? "!" : "", parsed_flag_op_names[pfo]); |
69a3cdfc |
3459 | } |
3460 | else { |
3461 | ferr(po, "all methods of finding comparison failed\n"); |
3462 | } |
850c9265 |
3463 | |
69a3cdfc |
3464 | if (po->flags & OPF_JMP) { |
850c9265 |
3465 | fprintf(fout, " if %s\n", buf1); |
3466 | } |
5101a5f9 |
3467 | else if (po->op == OP_ADC || po->op == OP_SBB) { |
940e8e66 |
3468 | if (is_delayed) |
3469 | fprintf(fout, " cond_%s = %s;\n", |
3470 | parsed_flag_op_names[pfo], buf1); |
850c9265 |
3471 | } |
5101a5f9 |
3472 | else if (po->flags & OPF_DATA) { // SETcc |
850c9265 |
3473 | out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]); |
3474 | fprintf(fout, " %s = %s;", buf2, buf1); |
91977a1c |
3475 | } |
69a3cdfc |
3476 | else { |
3477 | ferr(po, "unhandled conditional op\n"); |
3478 | } |
91977a1c |
3479 | } |
3480 | |
940e8e66 |
3481 | pfomask = po->pfomask; |
3482 | |
850c9265 |
3483 | switch (po->op) |
91977a1c |
3484 | { |
3485 | case OP_MOV: |
3486 | assert_operand_cnt(2); |
850c9265 |
3487 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
de50b98b |
3488 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
3489 | fprintf(fout, " %s = %s;", buf1, |
3ebea2cf |
3490 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
3491 | po->operand[0].is_ptr ? "(void *)" : "", 0)); |
850c9265 |
3492 | break; |
3493 | |
3494 | case OP_LEA: |
3495 | assert_operand_cnt(2); |
87bf6cec |
3496 | po->operand[1].lmod = OPLM_DWORD; // always |
850c9265 |
3497 | fprintf(fout, " %s = %s;", |
3498 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
3499 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
3500 | NULL, 1)); |
850c9265 |
3501 | break; |
3502 | |
3503 | case OP_MOVZX: |
3504 | assert_operand_cnt(2); |
91977a1c |
3505 | fprintf(fout, " %s = %s;", |
850c9265 |
3506 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
3507 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
850c9265 |
3508 | break; |
3509 | |
3510 | case OP_MOVSX: |
3511 | assert_operand_cnt(2); |
3512 | switch (po->operand[1].lmod) { |
3513 | case OPLM_BYTE: |
3514 | strcpy(buf3, "(s8)"); |
3515 | break; |
3516 | case OPLM_WORD: |
3517 | strcpy(buf3, "(s16)"); |
3518 | break; |
3519 | default: |
3520 | ferr(po, "invalid src lmod: %d\n", po->operand[1].lmod); |
3521 | } |
a2c1d768 |
3522 | fprintf(fout, " %s = %s;", |
850c9265 |
3523 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
a2c1d768 |
3524 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
3525 | buf3, 0)); |
850c9265 |
3526 | break; |
3527 | |
3528 | case OP_NOT: |
3529 | assert_operand_cnt(1); |
3530 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
3531 | fprintf(fout, " %s = ~%s;", buf1, buf1); |
3532 | break; |
3533 | |
5101a5f9 |
3534 | case OP_CDQ: |
3535 | assert_operand_cnt(2); |
3536 | fprintf(fout, " %s = (s32)%s >> 31;", |
3537 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3ebea2cf |
3538 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
5101a5f9 |
3539 | strcpy(g_comment, "cdq"); |
3540 | break; |
3541 | |
33c35af6 |
3542 | case OP_STOS: |
3543 | // assumes DF=0 |
3544 | assert_operand_cnt(3); |
3545 | if (po->flags & OPF_REP) { |
3546 | fprintf(fout, " for (; ecx != 0; ecx--, edi += %d)\n", |
3547 | lmod_bytes(po, po->operand[0].lmod)); |
d4e3b5db |
3548 | fprintf(fout, " %sedi = eax;", |
3549 | lmod_cast_u_ptr(po, po->operand[0].lmod)); |
33c35af6 |
3550 | strcpy(g_comment, "rep stos"); |
3551 | } |
3552 | else { |
d4e3b5db |
3553 | fprintf(fout, " %sedi = eax; edi += %d;", |
3554 | lmod_cast_u_ptr(po, po->operand[0].lmod), |
33c35af6 |
3555 | lmod_bytes(po, po->operand[0].lmod)); |
3556 | strcpy(g_comment, "stos"); |
3557 | } |
3558 | break; |
3559 | |
d4e3b5db |
3560 | case OP_MOVS: |
3561 | // assumes DF=0 |
3562 | assert_operand_cnt(3); |
3563 | j = lmod_bytes(po, po->operand[0].lmod); |
3564 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
3565 | if (po->flags & OPF_REP) { |
3566 | fprintf(fout, |
3567 | " for (; ecx != 0; ecx--, edi += %d, esi += %d)\n", |
3568 | j, j); |
3569 | fprintf(fout, |
3570 | " %sedi = %sesi;", buf1, buf1); |
3571 | strcpy(g_comment, "rep movs"); |
3572 | } |
3573 | else { |
3574 | fprintf(fout, " %sedi = %sesi; edi += %d; esi += %d;", |
3575 | buf1, buf1, j, j); |
3576 | strcpy(g_comment, "movs"); |
3577 | } |
3578 | break; |
3579 | |
7ba45c34 |
3580 | case OP_CMPS: |
3581 | // assumes DF=0 |
3582 | // repe ~ repeat while ZF=1 |
3583 | assert_operand_cnt(3); |
3584 | j = lmod_bytes(po, po->operand[0].lmod); |
3585 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
3586 | if (po->flags & OPF_REP) { |
3587 | fprintf(fout, |
3588 | " for (; ecx != 0; ecx--, edi += %d, esi += %d)\n", |
3589 | j, j); |
3590 | fprintf(fout, |
3591 | " if ((cond_z = (%sedi == %sesi)) %s 0)\n", |
3592 | buf1, buf1, (po->flags & OPF_REPZ) ? "==" : "!="); |
3593 | fprintf(fout, |
3594 | " break;"); |
3595 | snprintf(g_comment, sizeof(g_comment), "rep%s cmps", |
3596 | (po->flags & OPF_REPZ) ? "e" : "ne"); |
3597 | } |
3598 | else { |
3599 | fprintf(fout, |
3600 | " cond_z = (%sedi = %sesi); edi += %d; esi += %d;", |
3601 | buf1, buf1, j, j); |
3602 | strcpy(g_comment, "cmps"); |
3603 | } |
3604 | pfomask &= ~(1 << PFO_Z); |
3605 | last_arith_dst = NULL; |
3606 | delayed_flag_op = NULL; |
3607 | break; |
3608 | |
850c9265 |
3609 | // arithmetic w/flags |
3610 | case OP_ADD: |
3611 | case OP_SUB: |
3612 | case OP_AND: |
3613 | case OP_OR: |
5101a5f9 |
3614 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
3615 | // fallthrough |
850c9265 |
3616 | dualop_arith: |
3617 | assert_operand_cnt(2); |
850c9265 |
3618 | fprintf(fout, " %s %s= %s;", |
3619 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
3620 | op_to_c(po), |
3ebea2cf |
3621 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
04f8a628 |
3622 | output_std_flags(fout, po, &pfomask, buf1); |
3623 | last_arith_dst = &po->operand[0]; |
3624 | delayed_flag_op = NULL; |
3625 | break; |
3626 | |
3627 | case OP_SHL: |
3628 | case OP_SHR: |
3629 | assert_operand_cnt(2); |
3630 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
3631 | if (pfomask & (1 << PFO_C)) { |
3632 | if (po->operand[1].type == OPT_CONST) { |
3633 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
3634 | j = po->operand[1].val; |
3635 | j %= l; |
3636 | if (j != 0) { |
3637 | if (po->op == OP_SHL) |
3638 | j = l - j; |
3639 | else |
3640 | j -= 1; |
3641 | fprintf(fout, " cond_c = (%s & 0x%02x) ? 1 : 0;\n", |
3642 | buf1, 1 << j); |
3643 | } |
3644 | else |
3645 | ferr(po, "zero shift?\n"); |
3646 | } |
3647 | else |
3648 | ferr(po, "TODO\n"); |
3649 | pfomask &= ~(1 << PFO_C); |
840257f6 |
3650 | } |
04f8a628 |
3651 | fprintf(fout, " %s %s= %s;", buf1, op_to_c(po), |
3652 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
3653 | output_std_flags(fout, po, &pfomask, buf1); |
850c9265 |
3654 | last_arith_dst = &po->operand[0]; |
69a3cdfc |
3655 | delayed_flag_op = NULL; |
850c9265 |
3656 | break; |
3657 | |
d4e3b5db |
3658 | case OP_SAR: |
3659 | assert_operand_cnt(2); |
3660 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
3661 | fprintf(fout, " %s = %s%s >> %s;", buf1, |
3662 | lmod_cast_s(po, po->operand[0].lmod), buf1, |
3ebea2cf |
3663 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
04f8a628 |
3664 | output_std_flags(fout, po, &pfomask, buf1); |
d4e3b5db |
3665 | last_arith_dst = &po->operand[0]; |
3666 | delayed_flag_op = NULL; |
3667 | break; |
3668 | |
3669 | case OP_ROL: |
3670 | case OP_ROR: |
3671 | assert_operand_cnt(2); |
3672 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
3673 | if (po->operand[1].type == OPT_CONST) { |
3674 | j = po->operand[1].val; |
3675 | j %= lmod_bytes(po, po->operand[0].lmod) * 8; |
3676 | fprintf(fout, po->op == OP_ROL ? |
3677 | " %s = (%s << %d) | (%s >> %d);" : |
3678 | " %s = (%s >> %d) | (%s << %d);", |
3679 | buf1, buf1, j, buf1, |
3680 | lmod_bytes(po, po->operand[0].lmod) * 8 - j); |
3681 | } |
3682 | else |
3683 | ferr(po, "TODO\n"); |
04f8a628 |
3684 | output_std_flags(fout, po, &pfomask, buf1); |
d4e3b5db |
3685 | last_arith_dst = &po->operand[0]; |
3686 | delayed_flag_op = NULL; |
3687 | break; |
3688 | |
5101a5f9 |
3689 | case OP_XOR: |
850c9265 |
3690 | assert_operand_cnt(2); |
3691 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
5101a5f9 |
3692 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
3693 | // special case for XOR |
3694 | fprintf(fout, " %s = 0;", |
3695 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
3696 | last_arith_dst = &po->operand[0]; |
3697 | delayed_flag_op = NULL; |
850c9265 |
3698 | break; |
850c9265 |
3699 | } |
5101a5f9 |
3700 | goto dualop_arith; |
3701 | |
5101a5f9 |
3702 | case OP_ADC: |
850c9265 |
3703 | case OP_SBB: |
5101a5f9 |
3704 | assert_operand_cnt(2); |
3705 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
a2c1d768 |
3706 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
840257f6 |
3707 | if (po->op == OP_SBB |
3708 | && IS(po->operand[0].name, po->operand[1].name)) |
3709 | { |
3710 | // avoid use of unitialized var |
a2c1d768 |
3711 | fprintf(fout, " %s = -cond_c;", buf1); |
94d447fb |
3712 | // carry remains what it was |
3713 | pfomask &= ~(1 << PFO_C); |
840257f6 |
3714 | } |
3715 | else { |
a2c1d768 |
3716 | fprintf(fout, " %s %s= %s + cond_c;", buf1, op_to_c(po), |
3ebea2cf |
3717 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
840257f6 |
3718 | } |
a2c1d768 |
3719 | output_std_flags(fout, po, &pfomask, buf1); |
5101a5f9 |
3720 | last_arith_dst = &po->operand[0]; |
3721 | delayed_flag_op = NULL; |
850c9265 |
3722 | break; |
3723 | |
3724 | case OP_INC: |
3725 | case OP_DEC: |
3726 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
1bafb621 |
3727 | if (po->operand[0].type == OPT_REG) { |
3728 | strcpy(buf2, po->op == OP_INC ? "++" : "--"); |
3729 | fprintf(fout, " %s%s;", buf1, buf2); |
3730 | } |
3731 | else { |
3732 | strcpy(buf2, po->op == OP_INC ? "+" : "-"); |
3733 | fprintf(fout, " %s %s= 1;", buf1, buf2); |
3734 | } |
a2c1d768 |
3735 | output_std_flags(fout, po, &pfomask, buf1); |
5101a5f9 |
3736 | last_arith_dst = &po->operand[0]; |
3737 | delayed_flag_op = NULL; |
3738 | break; |
3739 | |
3740 | case OP_NEG: |
3741 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
3ebea2cf |
3742 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]); |
5101a5f9 |
3743 | fprintf(fout, " %s = -%s%s;", buf1, |
3744 | lmod_cast_s(po, po->operand[0].lmod), buf2); |
850c9265 |
3745 | last_arith_dst = &po->operand[0]; |
69a3cdfc |
3746 | delayed_flag_op = NULL; |
940e8e66 |
3747 | if (pfomask & (1 << PFO_C)) { |
3748 | fprintf(fout, "\n cond_c = (%s != 0);", buf1); |
3749 | pfomask &= ~(1 << PFO_C); |
3750 | } |
850c9265 |
3751 | break; |
3752 | |
3753 | case OP_IMUL: |
de50b98b |
3754 | if (po->operand_cnt == 2) { |
3755 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
850c9265 |
3756 | goto dualop_arith; |
de50b98b |
3757 | } |
87bf6cec |
3758 | if (po->operand_cnt == 3) |
3759 | ferr(po, "TODO imul3\n"); |
3760 | // fallthrough |
3761 | case OP_MUL: |
3762 | assert_operand_cnt(1); |
3763 | strcpy(buf1, po->op == OP_IMUL ? "(s64)(s32)" : "(u64)"); |
3764 | fprintf(fout, " mul_tmp = %seax * %s%s;\n", buf1, buf1, |
3ebea2cf |
3765 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0])); |
87bf6cec |
3766 | fprintf(fout, " edx = mul_tmp >> 32;\n"); |
3767 | fprintf(fout, " eax = mul_tmp;"); |
3768 | last_arith_dst = NULL; |
69a3cdfc |
3769 | delayed_flag_op = NULL; |
91977a1c |
3770 | break; |
3771 | |
5101a5f9 |
3772 | case OP_DIV: |
3773 | case OP_IDIV: |
3774 | assert_operand_cnt(1); |
3775 | if (po->operand[0].lmod != OPLM_DWORD) |
3776 | ferr(po, "unhandled lmod %d\n", po->operand[0].lmod); |
3777 | |
3778 | // 32bit division is common, look for it |
64c59faf |
3779 | if (po->op == OP_DIV) |
cdfaeed7 |
3780 | ret = scan_for_reg_clear(i, xDX); |
64c59faf |
3781 | else |
cdfaeed7 |
3782 | ret = scan_for_cdq_edx(i); |
64c59faf |
3783 | if (ret >= 0) { |
3ebea2cf |
3784 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
5101a5f9 |
3785 | strcpy(buf2, lmod_cast(po, po->operand[0].lmod, |
3786 | po->op == OP_IDIV)); |
3787 | fprintf(fout, " edx = %seax %% %s%s;\n", buf2, buf2, buf1); |
3788 | fprintf(fout, " eax = %seax / %s%s;", buf2, buf2, buf1); |
3789 | } |
3790 | else |
3791 | ferr(po, "TODO 64bit divident\n"); |
87bf6cec |
3792 | last_arith_dst = NULL; |
3793 | delayed_flag_op = NULL; |
5101a5f9 |
3794 | break; |
3795 | |
91977a1c |
3796 | case OP_TEST: |
3797 | case OP_CMP: |
850c9265 |
3798 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
940e8e66 |
3799 | if (pfomask != 0) { |
69a3cdfc |
3800 | for (j = 0; j < 8; j++) { |
940e8e66 |
3801 | if (pfomask & (1 << j)) { |
69a3cdfc |
3802 | out_cmp_test(buf1, sizeof(buf1), po, j, 0); |
3803 | fprintf(fout, " cond_%s = %s;", |
3804 | parsed_flag_op_names[j], buf1); |
3805 | } |
3806 | } |
940e8e66 |
3807 | pfomask = 0; |
69a3cdfc |
3808 | } |
3809 | else |
3810 | no_output = 1; |
7ba45c34 |
3811 | last_arith_dst = NULL; |
69a3cdfc |
3812 | delayed_flag_op = po; |
91977a1c |
3813 | break; |
3814 | |
69a3cdfc |
3815 | // note: we reuse OP_Jcc for SETcc, only flags differ |
91977a1c |
3816 | case OP_JO ... OP_JG: |
5101a5f9 |
3817 | if (po->flags & OPF_JMP) |
850c9265 |
3818 | fprintf(fout, " goto %s;", po->operand[0].name); |
5101a5f9 |
3819 | // else SETcc - should already be handled |
850c9265 |
3820 | break; |
3821 | |
3822 | case OP_JMP: |
87bf6cec |
3823 | assert_operand_cnt(1); |
de50b98b |
3824 | last_arith_dst = NULL; |
3825 | delayed_flag_op = NULL; |
3826 | |
4c45fa73 |
3827 | if (po->operand[0].type == OPT_REGMEM) { |
3828 | ret = sscanf(po->operand[0].name, "%[^[][%[^*]*4]", |
3829 | buf1, buf2); |
3830 | if (ret != 2) |
3831 | ferr(po, "parse failure for jmp '%s'\n", |
3832 | po->operand[0].name); |
3833 | fprintf(fout, " goto *jt_%s[%s];", buf1, buf2); |
3834 | break; |
3835 | } |
3836 | else if (po->operand[0].type != OPT_LABEL) |
3837 | ferr(po, "unhandled jmp type\n"); |
87bf6cec |
3838 | |
850c9265 |
3839 | fprintf(fout, " goto %s;", po->operand[0].name); |
91977a1c |
3840 | break; |
3841 | |
3842 | case OP_CALL: |
5101a5f9 |
3843 | assert_operand_cnt(1); |
850c9265 |
3844 | pp = po->datap; |
89ff3147 |
3845 | my_assert_not(pp, NULL); |
91977a1c |
3846 | |
89ff3147 |
3847 | if (pp->is_fptr) |
ddaf8bd7 |
3848 | fprintf(fout, " %s = %s;\n", pp->name, |
1cd4a663 |
3849 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], |
3850 | "(void *)", 0)); |
1bafb621 |
3851 | |
91977a1c |
3852 | fprintf(fout, " "); |
2b43685d |
3853 | if (strstr(pp->ret_type.name, "int64")) { |
87bf6cec |
3854 | if (po->flags & OPF_TAIL) |
2b43685d |
3855 | ferr(po, "int64 and tail?\n"); |
3856 | fprintf(fout, "mul_tmp = "); |
3857 | } |
3858 | else if (!IS(pp->ret_type.name, "void")) { |
3859 | if (po->flags & OPF_TAIL) { |
840257f6 |
3860 | if (!IS(g_func_pp->ret_type.name, "void")) { |
3861 | fprintf(fout, "return "); |
3862 | if (g_func_pp->ret_type.is_ptr != pp->ret_type.is_ptr) |
3863 | fprintf(fout, "(%s)", g_func_pp->ret_type.name); |
3864 | } |
2b43685d |
3865 | } |
75ad0378 |
3866 | else if (regmask & (1 << xAX)) { |
87bf6cec |
3867 | fprintf(fout, "eax = "); |
2b43685d |
3868 | if (pp->ret_type.is_ptr) |
3869 | fprintf(fout, "(u32)"); |
3870 | } |
91977a1c |
3871 | } |
87bf6cec |
3872 | |
ddaf8bd7 |
3873 | if (pp->name[0] == 0) |
3874 | ferr(po, "missing pp->name\n"); |
3875 | fprintf(fout, "%s%s(", pp->name, |
3876 | pp->has_structarg ? "_sa" : ""); |
39b168b8 |
3877 | |
91977a1c |
3878 | for (arg = 0; arg < pp->argc; arg++) { |
3879 | if (arg > 0) |
3880 | fprintf(fout, ", "); |
87bf6cec |
3881 | |
3ebea2cf |
3882 | cast[0] = 0; |
3883 | if (pp->arg[arg].type.is_ptr) |
3884 | snprintf(cast, sizeof(cast), "(%s)", pp->arg[arg].type.name); |
87bf6cec |
3885 | |
91977a1c |
3886 | if (pp->arg[arg].reg != NULL) { |
3ebea2cf |
3887 | fprintf(fout, "%s%s", cast, pp->arg[arg].reg); |
91977a1c |
3888 | continue; |
3889 | } |
3890 | |
3891 | // stack arg |
3892 | tmp_op = pp->arg[arg].datap; |
3893 | if (tmp_op == NULL) |
850c9265 |
3894 | ferr(po, "parsed_op missing for arg%d\n", arg); |
de50b98b |
3895 | if (tmp_op->argnum != 0) { |
3896 | fprintf(fout, "%ss_a%d", cast, tmp_op->argnum); |
69a3cdfc |
3897 | } |
3898 | else { |
3899 | fprintf(fout, "%s", |
3900 | out_src_opr(buf1, sizeof(buf1), |
3ebea2cf |
3901 | tmp_op, &tmp_op->operand[0], cast, 0)); |
69a3cdfc |
3902 | } |
91977a1c |
3903 | } |
3904 | fprintf(fout, ");"); |
87bf6cec |
3905 | |
2b43685d |
3906 | if (strstr(pp->ret_type.name, "int64")) { |
3907 | fprintf(fout, "\n"); |
3908 | fprintf(fout, " edx = mul_tmp >> 32;\n"); |
3909 | fprintf(fout, " eax = mul_tmp;"); |
3910 | } |
3911 | |
89ff3147 |
3912 | if (pp->is_unresolved) { |
ddaf8bd7 |
3913 | snprintf(buf3, sizeof(buf3), " unresoved %dreg", |
89ff3147 |
3914 | pp->argc_reg); |
3915 | strcat(g_comment, buf3); |
3916 | } |
3917 | |
87bf6cec |
3918 | if (po->flags & OPF_TAIL) { |
840257f6 |
3919 | ret = 0; |
ddaf8bd7 |
3920 | if (i == opcnt - 1 || pp->is_noreturn) |
840257f6 |
3921 | ret = 0; |
3922 | else if (IS(pp->ret_type.name, "void")) |
3923 | ret = 1; |
3924 | else if (IS(g_func_pp->ret_type.name, "void")) |
3925 | ret = 1; |
3926 | // else already handled as 'return f()' |
3927 | |
3928 | if (ret) { |
da87ae38 |
3929 | if (!IS(g_func_pp->ret_type.name, "void")) { |
ddaf8bd7 |
3930 | ferr(po, "int func -> void func tailcall?\n"); |
da87ae38 |
3931 | } |
3932 | else { |
3933 | fprintf(fout, "\n return;"); |
ddaf8bd7 |
3934 | strcat(g_comment, " ^ tailcall"); |
da87ae38 |
3935 | } |
3ebea2cf |
3936 | } |
89ff3147 |
3937 | else |
ddaf8bd7 |
3938 | strcat(g_comment, " tailcall"); |
87bf6cec |
3939 | } |
ddaf8bd7 |
3940 | if (pp->is_noreturn) |
3941 | strcat(g_comment, " noreturn"); |
87bf6cec |
3942 | delayed_flag_op = NULL; |
3943 | last_arith_dst = NULL; |
91977a1c |
3944 | break; |
3945 | |
3946 | case OP_RET: |
bd96f656 |
3947 | if (g_func_pp->is_vararg) |
4f12f671 |
3948 | fprintf(fout, " va_end(ap);\n"); |
3949 | |
bd96f656 |
3950 | if (IS(g_func_pp->ret_type.name, "void")) { |
3ebea2cf |
3951 | if (i != opcnt - 1 || label_pending) |
3952 | fprintf(fout, " return;"); |
3953 | } |
bd96f656 |
3954 | else if (g_func_pp->ret_type.is_ptr) { |
d4e3b5db |
3955 | fprintf(fout, " return (%s)eax;", |
bd96f656 |
3956 | g_func_pp->ret_type.name); |
3ebea2cf |
3957 | } |
91977a1c |
3958 | else |
3959 | fprintf(fout, " return eax;"); |
de50b98b |
3960 | |
3961 | last_arith_dst = NULL; |
3962 | delayed_flag_op = NULL; |
91977a1c |
3963 | break; |
3964 | |
3965 | case OP_PUSH: |
de50b98b |
3966 | if (po->argnum != 0) { |
69a3cdfc |
3967 | // special case - saved func arg |
3ebea2cf |
3968 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
de50b98b |
3969 | fprintf(fout, " s_a%d = %s;", po->argnum, buf1); |
69a3cdfc |
3970 | break; |
3971 | } |
d4e3b5db |
3972 | else if (po->flags & OPF_RSAVE) { |
3ebea2cf |
3973 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
d4e3b5db |
3974 | fprintf(fout, " s_%s = %s;", buf1, buf1); |
3975 | break; |
3976 | } |
e56ab892 |
3977 | if (!(g_ida_func_attr & IDAFA_NORETURN)) |
3978 | ferr(po, "stray push encountered\n"); |
3979 | no_output = 1; |
91977a1c |
3980 | break; |
3981 | |
3982 | case OP_POP: |
d4e3b5db |
3983 | if (po->flags & OPF_RSAVE) { |
3ebea2cf |
3984 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
d4e3b5db |
3985 | fprintf(fout, " %s = s_%s;", buf1, buf1); |
3986 | break; |
3987 | } |
3988 | ferr(po, "stray pop encountered\n"); |
91977a1c |
3989 | break; |
3990 | |
33c35af6 |
3991 | case OP_NOP: |
2b43685d |
3992 | no_output = 1; |
33c35af6 |
3993 | break; |
3994 | |
91977a1c |
3995 | default: |
3996 | no_output = 1; |
69a3cdfc |
3997 | ferr(po, "unhandled op type %d, flags %x\n", |
3998 | po->op, po->flags); |
91977a1c |
3999 | break; |
4000 | } |
4001 | |
4002 | if (g_comment[0] != 0) { |
ddaf8bd7 |
4003 | char *p = g_comment; |
4004 | while (my_isblank(*p)) |
4005 | p++; |
4006 | fprintf(fout, " // %s", p); |
91977a1c |
4007 | g_comment[0] = 0; |
4008 | no_output = 0; |
4009 | } |
4010 | if (!no_output) |
4011 | fprintf(fout, "\n"); |
5101a5f9 |
4012 | |
2b43685d |
4013 | // some sanity checking |
4014 | if ((po->flags & OPF_REP) && po->op != OP_STOS |
4015 | && po->op != OP_MOVS && po->op != OP_CMPS) |
4016 | ferr(po, "unexpected rep\n"); |
4017 | if ((po->flags & (OPF_REPZ|OPF_REPNZ)) && po->op != OP_CMPS) |
4018 | ferr(po, "unexpected repz/repnz\n"); |
4019 | |
940e8e66 |
4020 | if (pfomask != 0) |
7ba45c34 |
4021 | ferr(po, "missed flag calc, pfomask=%x\n", pfomask); |
940e8e66 |
4022 | |
5101a5f9 |
4023 | // see is delayed flag stuff is still valid |
4024 | if (delayed_flag_op != NULL && delayed_flag_op != po) { |
89ff3147 |
4025 | if (is_any_opr_modified(delayed_flag_op, po, 0)) |
5101a5f9 |
4026 | delayed_flag_op = NULL; |
4027 | } |
4028 | |
4029 | if (last_arith_dst != NULL && last_arith_dst != &po->operand[0]) { |
4030 | if (is_opr_modified(last_arith_dst, po)) |
4031 | last_arith_dst = NULL; |
4032 | } |
3ebea2cf |
4033 | |
4034 | label_pending = 0; |
91977a1c |
4035 | } |
4036 | |
a2c1d768 |
4037 | if (g_stack_fsz && !g_stack_frame_used) |
4038 | fprintf(fout, " (void)sf;\n"); |
4039 | |
91977a1c |
4040 | fprintf(fout, "}\n\n"); |
4041 | |
4042 | // cleanup |
4043 | for (i = 0; i < opcnt; i++) { |
4c45fa73 |
4044 | struct label_ref *lr, *lr_del; |
4045 | |
4046 | lr = g_label_refs[i].next; |
4047 | while (lr != NULL) { |
4048 | lr_del = lr; |
4049 | lr = lr->next; |
4050 | free(lr_del); |
4051 | } |
4052 | g_label_refs[i].i = -1; |
4053 | g_label_refs[i].next = NULL; |
4054 | |
91977a1c |
4055 | if (ops[i].op == OP_CALL) { |
4056 | pp = ops[i].datap; |
bd96f656 |
4057 | if (pp) |
91977a1c |
4058 | proto_release(pp); |
91977a1c |
4059 | } |
4060 | } |
bd96f656 |
4061 | g_func_pp = NULL; |
91977a1c |
4062 | } |
c36e914d |
4063 | |
d4e3b5db |
4064 | static void set_label(int i, const char *name) |
4065 | { |
4066 | const char *p; |
4067 | int len; |
4068 | |
4069 | len = strlen(name); |
4070 | p = strchr(name, ':'); |
4071 | if (p != NULL) |
4072 | len = p - name; |
4073 | |
4074 | if (len > sizeof(g_labels[0]) - 1) |
4075 | aerr("label '%s' too long: %d\n", name, len); |
e56ab892 |
4076 | if (g_labels[i][0] != 0 && !IS_START(g_labels[i], "algn_")) |
4077 | aerr("dupe label '%s' vs '%s'?\n", name, g_labels[i]); |
d4e3b5db |
4078 | memcpy(g_labels[i], name, len); |
4079 | g_labels[i][len] = 0; |
4080 | } |
4081 | |
bfa4a6ee |
4082 | // '=' needs special treatment.. |
4083 | static char *next_word_s(char *w, size_t wsize, char *s) |
4084 | { |
4085 | size_t i; |
4086 | |
4087 | s = sskip(s); |
4088 | |
4089 | for (i = 0; i < wsize - 1; i++) { |
4090 | if (s[i] == 0 || my_isblank(s[i]) || (s[i] == '=' && i > 0)) |
4091 | break; |
4092 | w[i] = s[i]; |
4093 | } |
4094 | w[i] = 0; |
4095 | |
4096 | if (s[i] != 0 && !my_isblank(s[i]) && s[i] != '=') |
4097 | printf("warning: '%s' truncated\n", w); |
4098 | |
4099 | return s + i; |
4100 | } |
4101 | |
e56ab892 |
4102 | struct chunk_item { |
4103 | char *name; |
4104 | long fptr; |
de50b98b |
4105 | int asmln; |
e56ab892 |
4106 | }; |
4107 | |
cdfaeed7 |
4108 | static struct chunk_item *func_chunks; |
4109 | static int func_chunk_cnt; |
4110 | static int func_chunk_alloc; |
4111 | |
4112 | static void add_func_chunk(FILE *fasm, const char *name, int line) |
4113 | { |
4114 | if (func_chunk_cnt >= func_chunk_alloc) { |
4115 | func_chunk_alloc *= 2; |
4116 | func_chunks = realloc(func_chunks, |
4117 | func_chunk_alloc * sizeof(func_chunks[0])); |
4118 | my_assert_not(func_chunks, NULL); |
4119 | } |
4120 | func_chunks[func_chunk_cnt].fptr = ftell(fasm); |
4121 | func_chunks[func_chunk_cnt].name = strdup(name); |
4122 | func_chunks[func_chunk_cnt].asmln = line; |
4123 | func_chunk_cnt++; |
4124 | } |
4125 | |
e56ab892 |
4126 | static int cmp_chunks(const void *p1, const void *p2) |
4127 | { |
4128 | const struct chunk_item *c1 = p1, *c2 = p2; |
4129 | return strcmp(c1->name, c2->name); |
4130 | } |
4131 | |
bfa4a6ee |
4132 | static int cmpstringp(const void *p1, const void *p2) |
4133 | { |
4134 | return strcmp(*(char * const *)p1, *(char * const *)p2); |
4135 | } |
4136 | |
cdfaeed7 |
4137 | static void scan_ahead(FILE *fasm) |
4138 | { |
4139 | char words[2][256]; |
4140 | char line[256]; |
4141 | long oldpos; |
4142 | int oldasmln; |
4143 | int wordc; |
4144 | char *p; |
4145 | int i; |
4146 | |
4147 | oldpos = ftell(fasm); |
4148 | oldasmln = asmln; |
4149 | |
4150 | while (fgets(line, sizeof(line), fasm)) |
4151 | { |
4152 | wordc = 0; |
4153 | asmln++; |
4154 | |
4155 | p = sskip(line); |
4156 | if (*p == 0) |
4157 | continue; |
4158 | |
4159 | if (*p == ';') |
4160 | { |
4161 | // get rid of random tabs |
4162 | for (i = 0; line[i] != 0; i++) |
4163 | if (line[i] == '\t') |
4164 | line[i] = ' '; |
4165 | |
4166 | if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR ")) |
4167 | { |
4168 | p += 30; |
4169 | next_word(words[0], sizeof(words[0]), p); |
4170 | if (words[0][0] == 0) |
4171 | aerr("missing name for func chunk?\n"); |
4172 | |
4173 | add_func_chunk(fasm, words[0], asmln); |
4174 | } |
4175 | continue; |
4176 | } // *p == ';' |
4177 | |
4178 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
4179 | words[wordc][0] = 0; |
4180 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
4181 | if (*p == 0 || *p == ';') { |
4182 | wordc++; |
4183 | break; |
4184 | } |
4185 | } |
4186 | |
4187 | if (wordc == 2 && IS(words[1], "ends")) |
4188 | break; |
4189 | } |
4190 | |
4191 | fseek(fasm, oldpos, SEEK_SET); |
4192 | asmln = oldasmln; |
4193 | } |
4194 | |
91977a1c |
4195 | int main(int argc, char *argv[]) |
4196 | { |
06c5d854 |
4197 | FILE *fout, *fasm, *frlist; |
4c45fa73 |
4198 | struct parsed_data *pd = NULL; |
4199 | int pd_alloc = 0; |
4200 | char **rlist = NULL; |
4201 | int rlist_len = 0; |
4202 | int rlist_alloc = 0; |
e56ab892 |
4203 | int func_chunks_used = 0; |
4204 | int func_chunks_sorted = 0; |
e56ab892 |
4205 | int func_chunk_i = -1; |
4206 | long func_chunk_ret = 0; |
de50b98b |
4207 | int func_chunk_ret_ln = 0; |
cdfaeed7 |
4208 | int scanned_ahead = 0; |
91977a1c |
4209 | char line[256]; |
a2c1d768 |
4210 | char words[20][256]; |
4c45fa73 |
4211 | enum opr_lenmod lmod; |
ddaf8bd7 |
4212 | char *sctproto = NULL; |
91977a1c |
4213 | int in_func = 0; |
4c45fa73 |
4214 | int pending_endp = 0; |
bfa4a6ee |
4215 | int skip_func = 0; |
940e8e66 |
4216 | int skip_warned = 0; |
91977a1c |
4217 | int eq_alloc; |
bfa4a6ee |
4218 | int verbose = 0; |
4219 | int arg_out; |
89ff3147 |
4220 | int arg; |
91977a1c |
4221 | int pi = 0; |
e56ab892 |
4222 | int i, j; |
4223 | int ret, len; |
91977a1c |
4224 | char *p; |
4225 | int wordc; |
4226 | |
89ff3147 |
4227 | for (arg = 1; arg < argc; arg++) { |
4228 | if (IS(argv[arg], "-v")) |
4229 | verbose = 1; |
4230 | else if (IS(argv[arg], "-rf")) |
4231 | g_allow_regfunc = 1; |
4232 | else |
4233 | break; |
bfa4a6ee |
4234 | } |
4235 | |
4236 | if (argc < arg + 3) { |
89ff3147 |
4237 | printf("usage:\n%s [-v] [-rf] <.c> <.asm> <hdrf> [rlist]*\n", |
91977a1c |
4238 | argv[0]); |
4239 | return 1; |
4240 | } |
4241 | |
bfa4a6ee |
4242 | arg_out = arg++; |
91977a1c |
4243 | |
bfa4a6ee |
4244 | asmfn = argv[arg++]; |
91977a1c |
4245 | fasm = fopen(asmfn, "r"); |
4246 | my_assert_not(fasm, NULL); |
4247 | |
bfa4a6ee |
4248 | hdrfn = argv[arg++]; |
06c5d854 |
4249 | g_fhdr = fopen(hdrfn, "r"); |
4250 | my_assert_not(g_fhdr, NULL); |
bfa4a6ee |
4251 | |
4252 | rlist_alloc = 64; |
4253 | rlist = malloc(rlist_alloc * sizeof(rlist[0])); |
4254 | my_assert_not(rlist, NULL); |
4255 | // needs special handling.. |
4256 | rlist[rlist_len++] = "__alloca_probe"; |
4257 | |
e56ab892 |
4258 | func_chunk_alloc = 32; |
4259 | func_chunks = malloc(func_chunk_alloc * sizeof(func_chunks[0])); |
4260 | my_assert_not(func_chunks, NULL); |
4261 | |
a2c1d768 |
4262 | memset(words, 0, sizeof(words)); |
4263 | |
bfa4a6ee |
4264 | for (; arg < argc; arg++) { |
4265 | frlist = fopen(argv[arg], "r"); |
4266 | my_assert_not(frlist, NULL); |
4267 | |
4268 | while (fgets(line, sizeof(line), frlist)) { |
4269 | p = sskip(line); |
1cd4a663 |
4270 | if (*p == 0 || *p == ';') |
4271 | continue; |
4272 | if (*p == '#') { |
89ff3147 |
4273 | if (IS_START(p, "#if 0") |
4274 | || (g_allow_regfunc && IS_START(p, "#if NO_REGFUNC"))) |
4275 | { |
1cd4a663 |
4276 | skip_func = 1; |
89ff3147 |
4277 | } |
1cd4a663 |
4278 | else if (IS_START(p, "#endif")) |
4279 | skip_func = 0; |
4280 | continue; |
4281 | } |
4282 | if (skip_func) |
bfa4a6ee |
4283 | continue; |
4284 | |
4285 | p = next_word(words[0], sizeof(words[0]), p); |
4286 | if (words[0][0] == 0) |
4287 | continue; |
4288 | |
4289 | if (rlist_len >= rlist_alloc) { |
4290 | rlist_alloc = rlist_alloc * 2 + 64; |
4291 | rlist = realloc(rlist, rlist_alloc * sizeof(rlist[0])); |
4292 | my_assert_not(rlist, NULL); |
4293 | } |
4294 | rlist[rlist_len++] = strdup(words[0]); |
4295 | } |
1cd4a663 |
4296 | skip_func = 0; |
bfa4a6ee |
4297 | |
4298 | fclose(frlist); |
4299 | frlist = NULL; |
4300 | } |
4301 | |
4302 | if (rlist_len > 0) |
4303 | qsort(rlist, rlist_len, sizeof(rlist[0]), cmpstringp); |
4304 | |
4305 | fout = fopen(argv[arg_out], "w"); |
91977a1c |
4306 | my_assert_not(fout, NULL); |
4307 | |
4308 | eq_alloc = 128; |
4309 | g_eqs = malloc(eq_alloc * sizeof(g_eqs[0])); |
4310 | my_assert_not(g_eqs, NULL); |
4311 | |
4c45fa73 |
4312 | for (i = 0; i < ARRAY_SIZE(g_label_refs); i++) { |
4313 | g_label_refs[i].i = -1; |
4314 | g_label_refs[i].next = NULL; |
4315 | } |
4316 | |
91977a1c |
4317 | while (fgets(line, sizeof(line), fasm)) |
4318 | { |
4c45fa73 |
4319 | wordc = 0; |
91977a1c |
4320 | asmln++; |
4321 | |
4322 | p = sskip(line); |
1bafb621 |
4323 | if (*p == 0) |
91977a1c |
4324 | continue; |
4325 | |
de50b98b |
4326 | // get rid of random tabs |
4327 | for (i = 0; line[i] != 0; i++) |
4328 | if (line[i] == '\t') |
4329 | line[i] = ' '; |
4330 | |
e56ab892 |
4331 | if (*p == ';') |
4332 | { |
e56ab892 |
4333 | if (p[2] == '=' && IS_START(p, "; =============== S U B")) |
4334 | goto do_pending_endp; // eww.. |
4335 | |
4336 | if (p[2] == 'A' && IS_START(p, "; Attributes:")) |
4337 | { |
4338 | static const char *attrs[] = { |
4339 | "bp-based frame", |
4340 | "library function", |
4341 | "static", |
4342 | "noreturn", |
4343 | "thunk", |
4344 | "fpd=", |
4345 | }; |
4346 | |
4347 | // parse IDA's attribute-list comment |
4348 | g_ida_func_attr = 0; |
4349 | p = sskip(p + 13); |
4350 | |
4351 | for (; *p != 0; p = sskip(p)) { |
4352 | for (i = 0; i < ARRAY_SIZE(attrs); i++) { |
4353 | if (!strncmp(p, attrs[i], strlen(attrs[i]))) { |
4354 | g_ida_func_attr |= 1 << i; |
4355 | p += strlen(attrs[i]); |
4356 | break; |
4357 | } |
4358 | } |
4359 | if (i == ARRAY_SIZE(attrs)) { |
4360 | anote("unparsed IDA attr: %s\n", p); |
1bafb621 |
4361 | break; |
4362 | } |
e56ab892 |
4363 | if (IS(attrs[i], "fpd=")) { |
4364 | p = next_word(words[0], sizeof(words[0]), p); |
4365 | // ignore for now.. |
4366 | } |
1bafb621 |
4367 | } |
e56ab892 |
4368 | } |
4369 | else if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR ")) |
4370 | { |
4371 | p += 30; |
4372 | next_word(words[0], sizeof(words[0]), p); |
4373 | if (words[0][0] == 0) |
cdfaeed7 |
4374 | aerr("missing name for func chunk?\n"); |
4375 | |
4376 | if (!scanned_ahead) { |
4377 | add_func_chunk(fasm, words[0], asmln); |
4378 | func_chunks_sorted = 0; |
e56ab892 |
4379 | } |
e56ab892 |
4380 | } |
4381 | else if (p[2] == 'E' && IS_START(p, "; END OF FUNCTION CHUNK")) |
4382 | { |
4383 | if (func_chunk_i >= 0) { |
4384 | if (func_chunk_i < func_chunk_cnt |
4385 | && IS(func_chunks[func_chunk_i].name, g_func)) |
4386 | { |
4387 | // move on to next chunk |
4388 | ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET); |
4389 | if (ret) |
4390 | aerr("seek failed for '%s' chunk #%d\n", |
4391 | g_func, func_chunk_i); |
de50b98b |
4392 | asmln = func_chunks[func_chunk_i].asmln; |
e56ab892 |
4393 | func_chunk_i++; |
4394 | } |
4395 | else { |
4396 | if (func_chunk_ret == 0) |
4397 | aerr("no return from chunk?\n"); |
4398 | fseek(fasm, func_chunk_ret, SEEK_SET); |
de50b98b |
4399 | asmln = func_chunk_ret_ln; |
e56ab892 |
4400 | func_chunk_ret = 0; |
4401 | pending_endp = 1; |
4402 | } |
1bafb621 |
4403 | } |
e56ab892 |
4404 | } |
4405 | else if (p[2] == 'F' && IS_START(p, "; FUNCTION CHUNK AT ")) { |
4406 | func_chunks_used = 1; |
4407 | p += 20; |
4408 | if (IS_START(g_func, "sub_")) { |
4409 | unsigned long addr = strtoul(p, NULL, 16); |
4410 | unsigned long f_addr = strtoul(g_func + 4, NULL, 16); |
cdfaeed7 |
4411 | if (addr > f_addr && !scanned_ahead) { |
94d447fb |
4412 | anote("scan_ahead caused by '%s', addr %lx\n", |
4413 | g_func, addr); |
cdfaeed7 |
4414 | scan_ahead(fasm); |
4415 | scanned_ahead = 1; |
4416 | func_chunks_sorted = 0; |
4417 | } |
1bafb621 |
4418 | } |
4419 | } |
4420 | continue; |
e56ab892 |
4421 | } // *p == ';' |
1bafb621 |
4422 | |
06c5d854 |
4423 | parse_words: |
a2c1d768 |
4424 | for (i = wordc; i < ARRAY_SIZE(words); i++) |
4425 | words[i][0] = 0; |
cdfaeed7 |
4426 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
bfa4a6ee |
4427 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
91977a1c |
4428 | if (*p == 0 || *p == ';') { |
4429 | wordc++; |
4430 | break; |
4431 | } |
4432 | } |
a2c1d768 |
4433 | if (*p != 0 && *p != ';') |
4434 | aerr("too many words\n"); |
91977a1c |
4435 | |
06c5d854 |
4436 | // alow asm patches in comments |
ddaf8bd7 |
4437 | if (*p == ';') { |
4438 | if (IS_START(p, "; sctpatch:")) { |
4439 | p = sskip(p + 11); |
4440 | if (*p == 0 || *p == ';') |
4441 | continue; |
4442 | goto parse_words; // lame |
4443 | } |
4444 | if (IS_START(p, "; sctproto:")) { |
4445 | sctproto = strdup(p + 11); |
4446 | } |
06c5d854 |
4447 | } |
4448 | |
91977a1c |
4449 | if (wordc == 0) { |
4450 | // shouldn't happen |
4451 | awarn("wordc == 0?\n"); |
4452 | continue; |
4453 | } |
4454 | |
4455 | // don't care about this: |
4456 | if (words[0][0] == '.' |
4457 | || IS(words[0], "include") |
4458 | || IS(words[0], "assume") || IS(words[1], "segment") |
4459 | || IS(words[0], "align")) |
4460 | { |
4461 | continue; |
4462 | } |
4463 | |
4c45fa73 |
4464 | do_pending_endp: |
4465 | // do delayed endp processing to collect switch jumptables |
4466 | if (pending_endp) { |
4467 | if (in_func && !skip_func && wordc >= 2 |
4468 | && ((words[0][0] == 'd' && words[0][2] == 0) |
4469 | || (words[1][0] == 'd' && words[1][2] == 0))) |
4470 | { |
4471 | i = 1; |
4472 | if (words[1][0] == 'd' && words[1][2] == 0) { |
4473 | // label |
4474 | if (g_func_pd_cnt >= pd_alloc) { |
4475 | pd_alloc = pd_alloc * 2 + 16; |
4476 | g_func_pd = realloc(g_func_pd, |
4477 | sizeof(g_func_pd[0]) * pd_alloc); |
4478 | my_assert_not(g_func_pd, NULL); |
4479 | } |
4480 | pd = &g_func_pd[g_func_pd_cnt]; |
4481 | g_func_pd_cnt++; |
4482 | memset(pd, 0, sizeof(*pd)); |
4483 | strcpy(pd->label, words[0]); |
4484 | pd->type = OPT_CONST; |
4485 | pd->lmod = lmod_from_directive(words[1]); |
4486 | i = 2; |
4487 | } |
4488 | else { |
da87ae38 |
4489 | if (pd == NULL) { |
4490 | if (verbose) |
4491 | anote("skipping alignment byte?\n"); |
4492 | continue; |
4493 | } |
4c45fa73 |
4494 | lmod = lmod_from_directive(words[0]); |
4495 | if (lmod != pd->lmod) |
4496 | aerr("lmod change? %d->%d\n", pd->lmod, lmod); |
4497 | } |
4498 | |
4499 | if (pd->count_alloc < pd->count + wordc) { |
4500 | pd->count_alloc = pd->count_alloc * 2 + 14 + wordc; |
4501 | pd->d = realloc(pd->d, sizeof(pd->d[0]) * pd->count_alloc); |
4502 | my_assert_not(pd->d, NULL); |
4503 | } |
4504 | for (; i < wordc; i++) { |
4505 | if (IS(words[i], "offset")) { |
4506 | pd->type = OPT_OFFSET; |
4507 | i++; |
4508 | } |
4509 | p = strchr(words[i], ','); |
4510 | if (p != NULL) |
4511 | *p = 0; |
4512 | if (pd->type == OPT_OFFSET) |
4513 | pd->d[pd->count].u.label = strdup(words[i]); |
4514 | else |
4515 | pd->d[pd->count].u.val = parse_number(words[i]); |
4516 | pd->d[pd->count].bt_i = -1; |
4517 | pd->count++; |
4518 | } |
4519 | continue; |
4520 | } |
4521 | |
4522 | if (in_func && !skip_func) |
4523 | gen_func(fout, g_fhdr, g_func, pi); |
4524 | |
4525 | pending_endp = 0; |
4526 | in_func = 0; |
4527 | g_ida_func_attr = 0; |
4528 | skip_warned = 0; |
4529 | skip_func = 0; |
4530 | g_func[0] = 0; |
e56ab892 |
4531 | func_chunks_used = 0; |
4532 | func_chunk_i = -1; |
4c45fa73 |
4533 | if (pi != 0) { |
4534 | memset(&ops, 0, pi * sizeof(ops[0])); |
4535 | memset(g_labels, 0, pi * sizeof(g_labels[0])); |
4536 | pi = 0; |
4537 | } |
4538 | g_eqcnt = 0; |
4539 | for (i = 0; i < g_func_pd_cnt; i++) { |
4540 | pd = &g_func_pd[i]; |
4541 | if (pd->type == OPT_OFFSET) { |
4542 | for (j = 0; j < pd->count; j++) |
4543 | free(pd->d[j].u.label); |
4544 | } |
4545 | free(pd->d); |
4546 | pd->d = NULL; |
4547 | } |
4548 | g_func_pd_cnt = 0; |
4549 | pd = NULL; |
4550 | if (wordc == 0) |
4551 | continue; |
4552 | } |
4553 | |
91977a1c |
4554 | if (IS(words[1], "proc")) { |
4555 | if (in_func) |
4556 | aerr("proc '%s' while in_func '%s'?\n", |
4557 | words[0], g_func); |
bfa4a6ee |
4558 | p = words[0]; |
ddaf8bd7 |
4559 | if (bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp)) |
bfa4a6ee |
4560 | skip_func = 1; |
91977a1c |
4561 | strcpy(g_func, words[0]); |
d4e3b5db |
4562 | set_label(0, words[0]); |
91977a1c |
4563 | in_func = 1; |
4564 | continue; |
4565 | } |
4566 | |
e56ab892 |
4567 | if (IS(words[1], "endp")) |
4568 | { |
91977a1c |
4569 | if (!in_func) |
4570 | aerr("endp '%s' while not in_func?\n", words[0]); |
4571 | if (!IS(g_func, words[0])) |
4572 | aerr("endp '%s' while in_func '%s'?\n", |
4573 | words[0], g_func); |
bfa4a6ee |
4574 | |
ddaf8bd7 |
4575 | if ((g_ida_func_attr & IDAFA_THUNK) && pi == 1 |
4576 | && ops[0].op == OP_JMP && ops[0].operand[0].had_ds) |
4577 | { |
4578 | // import jump |
4579 | skip_func = 1; |
4580 | } |
4581 | |
e56ab892 |
4582 | if (!skip_func && func_chunks_used) { |
4583 | // start processing chunks |
4584 | struct chunk_item *ci, key = { g_func, 0 }; |
4585 | |
4586 | func_chunk_ret = ftell(fasm); |
de50b98b |
4587 | func_chunk_ret_ln = asmln; |
e56ab892 |
4588 | if (!func_chunks_sorted) { |
4589 | qsort(func_chunks, func_chunk_cnt, |
4590 | sizeof(func_chunks[0]), cmp_chunks); |
4591 | func_chunks_sorted = 1; |
4592 | } |
4593 | ci = bsearch(&key, func_chunks, func_chunk_cnt, |
4594 | sizeof(func_chunks[0]), cmp_chunks); |
4595 | if (ci == NULL) |
4596 | aerr("'%s' needs chunks, but none found\n", g_func); |
4597 | func_chunk_i = ci - func_chunks; |
4598 | for (; func_chunk_i > 0; func_chunk_i--) |
4599 | if (!IS(func_chunks[func_chunk_i - 1].name, g_func)) |
4600 | break; |
4601 | |
4602 | ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET); |
4603 | if (ret) |
4604 | aerr("seek failed for '%s' chunk #%d\n", g_func, func_chunk_i); |
de50b98b |
4605 | asmln = func_chunks[func_chunk_i].asmln; |
e56ab892 |
4606 | func_chunk_i++; |
4607 | continue; |
4608 | } |
4c45fa73 |
4609 | pending_endp = 1; |
91977a1c |
4610 | continue; |
4611 | } |
4612 | |
a2c1d768 |
4613 | if (wordc == 2 && IS(words[1], "ends")) |
4614 | break; |
4615 | |
bfa4a6ee |
4616 | p = strchr(words[0], ':'); |
4617 | if (p != NULL) { |
d4e3b5db |
4618 | set_label(pi, words[0]); |
bfa4a6ee |
4619 | continue; |
4620 | } |
4621 | |
4622 | if (!in_func || skip_func) { |
4623 | if (!skip_warned && !skip_func && g_labels[pi][0] != 0) { |
4624 | if (verbose) |
4625 | anote("skipping from '%s'\n", g_labels[pi]); |
4626 | skip_warned = 1; |
4627 | } |
4628 | g_labels[pi][0] = 0; |
4629 | continue; |
4630 | } |
4631 | |
ddaf8bd7 |
4632 | if (wordc > 1 && IS(words[1], "=")) |
4633 | { |
91977a1c |
4634 | if (wordc != 5) |
4635 | aerr("unhandled equ, wc=%d\n", wordc); |
4636 | if (g_eqcnt >= eq_alloc) { |
4637 | eq_alloc *= 2; |
4638 | g_eqs = realloc(g_eqs, eq_alloc * sizeof(g_eqs[0])); |
4639 | my_assert_not(g_eqs, NULL); |
4640 | } |
4641 | |
4642 | len = strlen(words[0]); |
4643 | if (len > sizeof(g_eqs[0].name) - 1) |
4644 | aerr("equ name too long: %d\n", len); |
4645 | strcpy(g_eqs[g_eqcnt].name, words[0]); |
4646 | |
4647 | if (!IS(words[3], "ptr")) |
4648 | aerr("unhandled equ\n"); |
4649 | if (IS(words[2], "dword")) |
4650 | g_eqs[g_eqcnt].lmod = OPLM_DWORD; |
4651 | else if (IS(words[2], "word")) |
4652 | g_eqs[g_eqcnt].lmod = OPLM_WORD; |
4653 | else if (IS(words[2], "byte")) |
4654 | g_eqs[g_eqcnt].lmod = OPLM_BYTE; |
4655 | else |
4656 | aerr("bad lmod: '%s'\n", words[2]); |
4657 | |
4658 | g_eqs[g_eqcnt].offset = parse_number(words[4]); |
4659 | g_eqcnt++; |
4660 | continue; |
4661 | } |
4662 | |
4663 | if (pi >= ARRAY_SIZE(ops)) |
4664 | aerr("too many ops\n"); |
4665 | |
91977a1c |
4666 | parse_op(&ops[pi], words, wordc); |
ddaf8bd7 |
4667 | |
4668 | if (sctproto != NULL) { |
4669 | if (ops[pi].op == OP_CALL) |
4670 | ops[pi].datap = sctproto; |
4671 | sctproto = NULL; |
4672 | } |
91977a1c |
4673 | pi++; |
91977a1c |
4674 | } |
4675 | |
4676 | fclose(fout); |
4677 | fclose(fasm); |
06c5d854 |
4678 | fclose(g_fhdr); |
91977a1c |
4679 | |
4680 | return 0; |
c36e914d |
4681 | } |
91977a1c |
4682 | |
4683 | // vim:ts=2:shiftwidth=2:expandtab |