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.def tool, generate .lib and tramp on demand
[ia32rtools.git] / tools / translate.c
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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 15static const char *asmfn;
c36e914d 16static int asmln;
06c5d854 17static 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 31enum 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
46enum 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
102enum 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 112enum 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
121struct 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
91977a1c 129 int reg;
130 unsigned int val;
131 char name[256];
c36e914d 132};
133
134struct parsed_op {
91977a1c 135 enum op_op op;
136 struct parsed_opr operand[MAX_OPERANDS];
69a3cdfc 137 unsigned int flags;
91977a1c 138 int operand_cnt;
69a3cdfc 139 int regmask_src; // all referensed regs
140 int regmask_dst;
940e8e66 141 int pfomask; // flagop: parsed_flag_op that can't be delayed
de50b98b 142 int argnum; // push: altered before call arg #
940e8e66 143 int cc_scratch; // scratch storage during analysis
4c45fa73 144 int bt_i; // branch target for branches
145 struct parsed_data *btj;// branch targets for jumptables
91977a1c 146 void *datap;
147};
148
69a3cdfc 149// datap:
69a3cdfc 150// OP_CALL - ptr to parsed_proto
2b43685d 151// (OPF_CC) - point to one of (OPF_FLAGS) that affects cc op
69a3cdfc 152
91977a1c 153struct parsed_equ {
154 char name[64];
155 enum opr_lenmod lmod;
156 int offset;
c36e914d 157};
158
4c45fa73 159struct parsed_data {
160 char label[256];
161 enum opr_type type;
162 enum opr_lenmod lmod;
163 int count;
164 int count_alloc;
165 struct {
166 union {
167 char *label;
63df67be 168 unsigned int val;
4c45fa73 169 } u;
170 int bt_i;
171 } *d;
172};
173
174struct label_ref {
175 int i;
176 struct label_ref *next;
177};
178
1bafb621 179enum ida_func_attr {
180 IDAFA_BP_FRAME = (1 << 0),
181 IDAFA_LIB_FUNC = (1 << 1),
182 IDAFA_STATIC = (1 << 2),
183 IDAFA_NORETURN = (1 << 3),
184 IDAFA_THUNK = (1 << 4),
185 IDAFA_FPD = (1 << 5),
186};
187
188#define MAX_OPS 4096
c36e914d 189
190static struct parsed_op ops[MAX_OPS];
91977a1c 191static struct parsed_equ *g_eqs;
192static int g_eqcnt;
193static char g_labels[MAX_OPS][32];
4c45fa73 194static struct label_ref g_label_refs[MAX_OPS];
bd96f656 195static const struct parsed_proto *g_func_pp;
4c45fa73 196static struct parsed_data *g_func_pd;
197static int g_func_pd_cnt;
91977a1c 198static char g_func[256];
199static char g_comment[256];
200static int g_bp_frame;
1bafb621 201static int g_sp_frame;
a2c1d768 202static int g_stack_frame_used;
1bafb621 203static int g_stack_fsz;
4c45fa73 204static int g_ida_func_attr;
89ff3147 205static int g_allow_regfunc;
91977a1c 206#define ferr(op_, fmt, ...) do { \
63df67be 207 printf("error:%s:#%zd: '%s': " fmt, g_func, (op_) - ops, \
850c9265 208 dump_op(op_), ##__VA_ARGS__); \
33c35af6 209 fcloseall(); \
91977a1c 210 exit(1); \
211} while (0)
de50b98b 212#define fnote(op_, fmt, ...) \
213 printf("error:%s:#%zd: '%s': " fmt, g_func, (op_) - ops, \
214 dump_op(op_), ##__VA_ARGS__)
91977a1c 215
216#define MAX_REGS 8
217
218const char *regs_r32[] = { "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp" };
219const char *regs_r16[] = { "ax", "bx", "cx", "dx", "si", "di", "bp", "sp" };
220const char *regs_r8l[] = { "al", "bl", "cl", "dl" };
221const char *regs_r8h[] = { "ah", "bh", "ch", "dh" };
222
223enum x86_regs { xUNSPEC = -1, xAX, xBX, xCX, xDX, xSI, xDI, xBP, xSP };
224
69a3cdfc 225// possible basic comparison types (without inversion)
226enum parsed_flag_op {
227 PFO_O, // 0 OF=1
228 PFO_C, // 2 CF=1
229 PFO_Z, // 4 ZF=1
230 PFO_BE, // 6 CF=1||ZF=1
231 PFO_S, // 8 SF=1
232 PFO_P, // a PF=1
233 PFO_L, // c SF!=OF
234 PFO_LE, // e ZF=1||SF!=OF
235};
236
237static const char *parsed_flag_op_names[] = {
238 "o", "c", "z", "be", "s", "p", "l", "le"
239};
240
91977a1c 241static int char_array_i(const char *array[], size_t len, const char *s)
242{
243 int i;
c36e914d 244
91977a1c 245 for (i = 0; i < len; i++)
246 if (IS(s, array[i]))
247 return i;
c36e914d 248
91977a1c 249 return -1;
250}
251
63df67be 252static void printf_number(char *buf, size_t buf_size,
253 unsigned long number)
91977a1c 254{
5101a5f9 255 // output in C-friendly form
256 snprintf(buf, buf_size, number < 10 ? "%lu" : "0x%02lx", number);
257}
91977a1c 258
5101a5f9 259static int parse_reg(enum opr_lenmod *reg_lmod, const char *s)
260{
261 int reg;
91977a1c 262
5101a5f9 263 reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s);
264 if (reg >= 0) {
265 *reg_lmod = OPLM_DWORD;
266 return reg;
91977a1c 267 }
5101a5f9 268 reg = char_array_i(regs_r16, ARRAY_SIZE(regs_r16), s);
269 if (reg >= 0) {
270 *reg_lmod = OPLM_WORD;
271 return reg;
272 }
273 reg = char_array_i(regs_r8h, ARRAY_SIZE(regs_r8h), s);
274 if (reg >= 0) {
275 *reg_lmod = OPLM_BYTE;
276 return reg;
277 }
278 reg = char_array_i(regs_r8l, ARRAY_SIZE(regs_r8l), s);
279 if (reg >= 0) {
280 *reg_lmod = OPLM_BYTE;
281 return reg;
850c9265 282 }
283
284 return -1;
91977a1c 285}
286
5101a5f9 287static int parse_indmode(char *name, int *regmask, int need_c_cvt)
288{
289 enum opr_lenmod lmod;
290 char cvtbuf[256];
291 char *d = cvtbuf;
292 char *s = name;
293 char w[64];
294 long number;
295 int reg;
296 int c = 0;
297
298 *d = 0;
299
300 while (*s != 0) {
301 d += strlen(d);
302 while (my_isblank(*s))
303 s++;
304 for (; my_issep(*s); d++, s++)
305 *d = *s;
306 while (my_isblank(*s))
307 s++;
308 *d = 0;
309
87bf6cec 310 // skip 'ds:' prefix
39b168b8 311 if (IS_START(s, "ds:"))
87bf6cec 312 s += 3;
313
5101a5f9 314 s = next_idt(w, sizeof(w), s);
315 if (w[0] == 0)
316 break;
317 c++;
318
319 reg = parse_reg(&lmod, w);
320 if (reg >= 0) {
321 *regmask |= 1 << reg;
322 goto pass;
323 }
324
325 if ('0' <= w[0] && w[0] <= '9') {
326 number = parse_number(w);
327 printf_number(d, sizeof(cvtbuf) - (d - cvtbuf), number);
328 continue;
329 }
330
331 // probably some label/identifier - pass
332
333pass:
334 snprintf(d, sizeof(cvtbuf) - (d - cvtbuf), "%s", w);
335 }
336
337 if (need_c_cvt)
338 strcpy(name, cvtbuf);
339
340 return c;
341}
342
4c45fa73 343static int is_reg_in_str(const char *s)
344{
345 int i;
346
347 if (strlen(s) < 3 || (s[3] && !my_issep(s[3]) && !my_isblank(s[3])))
348 return 0;
349
350 for (i = 0; i < ARRAY_SIZE(regs_r32); i++)
351 if (!strncmp(s, regs_r32[i], 3))
352 return 1;
353
354 return 0;
355}
356
357static const char *parse_stack_el(const char *name, char *extra_reg)
d4e3b5db 358{
4c45fa73 359 const char *p, *p2, *s;
1bafb621 360 char *endp = NULL;
d4e3b5db 361 char buf[32];
1bafb621 362 long val;
d4e3b5db 363 int len;
364
4c45fa73 365 p = name;
366 if (IS_START(p + 3, "+ebp+") && is_reg_in_str(p)) {
367 p += 4;
368 if (extra_reg != NULL) {
369 strncpy(extra_reg, name, 3);
370 extra_reg[4] = 0;
371 }
d4e3b5db 372 }
4c45fa73 373
374 if (IS_START(p, "ebp+")) {
375 p += 4;
376
377 p2 = strchr(p, '+');
378 if (p2 != NULL && is_reg_in_str(p)) {
379 if (extra_reg != NULL) {
380 strncpy(extra_reg, p, p2 - p);
381 extra_reg[p2 - p] = 0;
382 }
383 p = p2 + 1;
384 }
385
386 if (!('0' <= *p && *p <= '9'))
387 return p;
388
389 return NULL;
390 }
391
39b168b8 392 if (!IS_START(name, "esp+"))
d4e3b5db 393 return NULL;
394
395 p = strchr(name + 4, '+');
396 if (p) {
1bafb621 397 // must be a number after esp+, already converted to 0x..
398 s = name + 4;
399 if (!('0' <= *s && *s <= '9')) {
400 aerr("%s nan?\n", __func__);
d4e3b5db 401 return NULL;
1bafb621 402 }
403 if (s[0] == '0' && s[1] == 'x')
404 s += 2;
405 len = p - s;
d4e3b5db 406 if (len < sizeof(buf) - 1) {
1bafb621 407 strncpy(buf, s, len);
d4e3b5db 408 buf[len] = 0;
1bafb621 409 val = strtol(buf, &endp, 16);
410 if (val == 0 || *endp != 0) {
411 aerr("%s num parse fail for '%s'\n", __func__, buf);
412 return NULL;
413 }
d4e3b5db 414 }
415 p++;
416 }
417 else
418 p = name + 4;
419
420 if ('0' <= *p && *p <= '9')
421 return NULL;
422
423 return p;
424}
425
850c9265 426static int guess_lmod_from_name(struct parsed_opr *opr)
427{
428 if (!strncmp(opr->name, "dword_", 6)) {
429 opr->lmod = OPLM_DWORD;
430 return 1;
431 }
432 if (!strncmp(opr->name, "word_", 5)) {
433 opr->lmod = OPLM_WORD;
434 return 1;
435 }
436 if (!strncmp(opr->name, "byte_", 5)) {
437 opr->lmod = OPLM_BYTE;
438 return 1;
439 }
440 return 0;
441}
442
3ebea2cf 443static int guess_lmod_from_c_type(enum opr_lenmod *lmod,
444 const struct parsed_type *c_type)
06c5d854 445{
06c5d854 446 static const char *dword_types[] = {
da87ae38 447 "int", "_DWORD", "UINT_PTR", "DWORD",
840257f6 448 "WPARAM", "LPARAM", "UINT",
da87ae38 449 "HIMC",
06c5d854 450 };
451 static const char *word_types[] = {
89ff3147 452 "uint16_t", "int16_t", "_WORD",
2b43685d 453 "unsigned __int16", "__int16",
06c5d854 454 };
455 static const char *byte_types[] = {
2b43685d 456 "uint8_t", "int8_t", "char",
89ff3147 457 "unsigned __int8", "__int8", "BYTE", "_BYTE",
a3684be1 458 "_UNKNOWN",
06c5d854 459 };
3ebea2cf 460 const char *n;
06c5d854 461 int i;
462
3ebea2cf 463 if (c_type->is_ptr) {
464 *lmod = OPLM_DWORD;
06c5d854 465 return 1;
466 }
467
3ebea2cf 468 n = skip_type_mod(c_type->name);
06c5d854 469
3ebea2cf 470 for (i = 0; i < ARRAY_SIZE(dword_types); i++) {
471 if (IS(n, dword_types[i])) {
472 *lmod = OPLM_DWORD;
06c5d854 473 return 1;
474 }
475 }
476
477 for (i = 0; i < ARRAY_SIZE(word_types); i++) {
3ebea2cf 478 if (IS(n, word_types[i])) {
479 *lmod = OPLM_WORD;
06c5d854 480 return 1;
481 }
482 }
483
484 for (i = 0; i < ARRAY_SIZE(byte_types); i++) {
3ebea2cf 485 if (IS(n, byte_types[i])) {
486 *lmod = OPLM_BYTE;
06c5d854 487 return 1;
488 }
489 }
490
06c5d854 491 return 0;
492}
493
4c45fa73 494static enum opr_type lmod_from_directive(const char *d)
495{
496 if (IS(d, "dd"))
497 return OPLM_DWORD;
498 else if (IS(d, "dw"))
499 return OPLM_WORD;
500 else if (IS(d, "db"))
501 return OPLM_BYTE;
502
503 aerr("unhandled directive: '%s'\n", d);
504 return OPLM_UNSPEC;
505}
506
5101a5f9 507static void setup_reg_opr(struct parsed_opr *opr, int reg, enum opr_lenmod lmod,
508 int *regmask)
509{
510 opr->type = OPT_REG;
511 opr->reg = reg;
512 opr->lmod = lmod;
513 *regmask |= 1 << reg;
514}
515
39b168b8 516static struct parsed_equ *equ_find(struct parsed_op *po, const char *name,
517 int *extra_offs);
87bf6cec 518
69a3cdfc 519static int parse_operand(struct parsed_opr *opr,
520 int *regmask, int *regmask_indirect,
1bafb621 521 char words[16][256], int wordc, int w, unsigned int op_flags)
c36e914d 522{
bd96f656 523 const struct parsed_proto *pp;
850c9265 524 enum opr_lenmod tmplmod;
63df67be 525 unsigned long number;
89ff3147 526 char buf[256];
850c9265 527 int ret, len;
1bafb621 528 int wordc_in;
89ff3147 529 char *p;
850c9265 530 int i;
c36e914d 531
1bafb621 532 if (w >= wordc)
533 aerr("parse_operand w %d, wordc %d\n", w, wordc);
c36e914d 534
1bafb621 535 opr->reg = xUNSPEC;
91977a1c 536
1bafb621 537 for (i = w; i < wordc; i++) {
538 len = strlen(words[i]);
539 if (words[i][len - 1] == ',') {
540 words[i][len - 1] = 0;
541 wordc = i + 1;
542 break;
543 }
544 }
c36e914d 545
1bafb621 546 wordc_in = wordc - w;
c36e914d 547
1bafb621 548 if ((op_flags & OPF_JMP) && wordc_in > 0
549 && !('0' <= words[w][0] && words[w][0] <= '9'))
550 {
551 const char *label = NULL;
552
553 if (wordc_in == 3 && !strncmp(words[w], "near", 4)
554 && IS(words[w + 1], "ptr"))
555 label = words[w + 2];
556 else if (wordc_in == 2 && IS(words[w], "short"))
557 label = words[w + 1];
558 else if (wordc_in == 1
559 && strchr(words[w], '[') == NULL
560 && parse_reg(&tmplmod, words[w]) < 0)
561 label = words[w];
562
563 if (label != NULL) {
564 opr->type = OPT_LABEL;
39b168b8 565 if (IS_START(label, "ds:"))
566 label += 3;
1bafb621 567 strcpy(opr->name, label);
568 return wordc;
569 }
570 }
c36e914d 571
1bafb621 572 if (wordc_in >= 3) {
573 if (IS(words[w + 1], "ptr")) {
574 if (IS(words[w], "dword"))
575 opr->lmod = OPLM_DWORD;
576 else if (IS(words[w], "word"))
577 opr->lmod = OPLM_WORD;
578 else if (IS(words[w], "byte"))
579 opr->lmod = OPLM_BYTE;
580 else
581 aerr("type parsing failed\n");
582 w += 2;
583 wordc_in = wordc - w;
584 }
585 }
586
39b168b8 587 if (wordc_in == 2) {
588 if (IS(words[w], "offset")) {
589 opr->type = OPT_OFFSET;
590 strcpy(opr->name, words[w + 1]);
591 return wordc;
592 }
593 if (IS(words[w], "(offset")) {
89ff3147 594 p = strchr(words[w + 1], ')');
39b168b8 595 if (p == NULL)
596 aerr("parse of bracketed offset failed\n");
597 *p = 0;
598 opr->type = OPT_OFFSET;
599 strcpy(opr->name, words[w + 1]);
600 return wordc;
601 }
1bafb621 602 }
c36e914d 603
1bafb621 604 if (wordc_in != 1)
850c9265 605 aerr("parse_operand 1 word expected\n");
c36e914d 606
89ff3147 607 if (IS_START(words[w], "ds:"))
608 memmove(words[w], words[w] + 3, strlen(words[w]) - 2);
609 strcpy(opr->name, words[w]);
c36e914d 610
850c9265 611 if (words[w][0] == '[') {
612 opr->type = OPT_REGMEM;
613 ret = sscanf(words[w], "[%[^]]]", opr->name);
614 if (ret != 1)
615 aerr("[] parse failure\n");
87bf6cec 616
5101a5f9 617 parse_indmode(opr->name, regmask_indirect, 1);
4c45fa73 618 if (opr->lmod == OPLM_UNSPEC && parse_stack_el(opr->name, NULL)) {
87bf6cec 619 // might be an equ
d4e3b5db 620 struct parsed_equ *eq =
4c45fa73 621 equ_find(NULL, parse_stack_el(opr->name, NULL), &i);
87bf6cec 622 if (eq)
623 opr->lmod = eq->lmod;
624 }
850c9265 625 return wordc;
626 }
627 else if (strchr(words[w], '[')) {
628 // label[reg] form
89ff3147 629 p = strchr(words[w], '[');
850c9265 630 opr->type = OPT_REGMEM;
89ff3147 631 parse_indmode(p, regmask_indirect, 0);
632 strncpy(buf, words[w], p - words[w]);
633 buf[p - words[w]] = 0;
634 pp = proto_parse(g_fhdr, buf, 1);
635 goto do_label;
850c9265 636 }
637 else if (('0' <= words[w][0] && words[w][0] <= '9')
638 || words[w][0] == '-')
639 {
5101a5f9 640 number = parse_number(words[w]);
91977a1c 641 opr->type = OPT_CONST;
5101a5f9 642 opr->val = number;
643 printf_number(opr->name, sizeof(opr->name), number);
91977a1c 644 return wordc;
850c9265 645 }
c36e914d 646
5101a5f9 647 ret = parse_reg(&tmplmod, opr->name);
648 if (ret >= 0) {
649 setup_reg_opr(opr, ret, tmplmod, regmask);
850c9265 650 return wordc;
651 }
652
653 // most likely var in data segment
654 opr->type = OPT_LABEL;
36595fd2 655 pp = proto_parse(g_fhdr, opr->name, 0);
89ff3147 656
657do_label:
bd96f656 658 if (pp != NULL) {
1cd4a663 659 if (pp->is_fptr || pp->is_func) {
06c5d854 660 opr->lmod = OPLM_DWORD;
661 opr->is_ptr = 1;
662 }
2b43685d 663 else {
840257f6 664 tmplmod = OPLM_UNSPEC;
bd96f656 665 if (!guess_lmod_from_c_type(&tmplmod, &pp->type))
2b43685d 666 anote("unhandled C type '%s' for '%s'\n",
bd96f656 667 pp->type.name, opr->name);
2b43685d 668
a3684be1 669 if (opr->lmod == OPLM_UNSPEC) {
2b43685d 670 opr->lmod = tmplmod;
a3684be1 671 opr->type_from_var = 1;
672 }
2b43685d 673 else if (opr->lmod != tmplmod) {
674 opr->size_mismatch = 1;
675 if (tmplmod < opr->lmod)
676 opr->size_lt = 1;
677 }
a652aa9f 678 opr->is_ptr = pp->type.is_ptr;
3ebea2cf 679 }
bd96f656 680 opr->is_array = pp->type.is_array;
06c5d854 681 }
682
850c9265 683 if (opr->lmod == OPLM_UNSPEC)
684 guess_lmod_from_name(opr);
850c9265 685 return wordc;
c36e914d 686}
687
33c35af6 688static const struct {
689 const char *name;
690 unsigned int flags;
691} pref_table[] = {
692 { "rep", OPF_REP },
7ba45c34 693 { "repe", OPF_REP|OPF_REPZ },
694 { "repz", OPF_REP|OPF_REPZ },
695 { "repne", OPF_REP|OPF_REPNZ },
696 { "repnz", OPF_REP|OPF_REPNZ },
33c35af6 697};
698
c36e914d 699static const struct {
850c9265 700 const char *name;
701 enum op_op op;
69a3cdfc 702 unsigned int minopr;
703 unsigned int maxopr;
704 unsigned int flags;
c36e914d 705} op_table[] = {
33c35af6 706 { "nop", OP_NOP, 0, 0, 0 },
69a3cdfc 707 { "push", OP_PUSH, 1, 1, 0 },
708 { "pop", OP_POP, 1, 1, OPF_DATA },
709 { "mov" , OP_MOV, 2, 2, OPF_DATA },
710 { "lea", OP_LEA, 2, 2, OPF_DATA },
711 { "movzx",OP_MOVZX, 2, 2, OPF_DATA },
712 { "movsx",OP_MOVSX, 2, 2, OPF_DATA },
713 { "not", OP_NOT, 1, 1, OPF_DATA },
5101a5f9 714 { "cdq", OP_CDQ, 0, 0, OPF_DATA },
33c35af6 715 { "stosb",OP_STOS, 0, 0, OPF_DATA },
716 { "stosw",OP_STOS, 0, 0, OPF_DATA },
717 { "stosd",OP_STOS, 0, 0, OPF_DATA },
d4e3b5db 718 { "movsb",OP_MOVS, 0, 0, OPF_DATA },
719 { "movsw",OP_MOVS, 0, 0, OPF_DATA },
720 { "movsd",OP_MOVS, 0, 0, OPF_DATA },
7ba45c34 721 { "cmpsb",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS },
722 { "cmpsw",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS },
723 { "cmpsd",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS },
69a3cdfc 724 { "add", OP_ADD, 2, 2, OPF_DATA|OPF_FLAGS },
725 { "sub", OP_SUB, 2, 2, OPF_DATA|OPF_FLAGS },
726 { "and", OP_AND, 2, 2, OPF_DATA|OPF_FLAGS },
727 { "or", OP_OR, 2, 2, OPF_DATA|OPF_FLAGS },
728 { "xor", OP_XOR, 2, 2, OPF_DATA|OPF_FLAGS },
729 { "shl", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS },
730 { "shr", OP_SHR, 2, 2, OPF_DATA|OPF_FLAGS },
731 { "sal", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS },
732 { "sar", OP_SAR, 2, 2, OPF_DATA|OPF_FLAGS },
d4e3b5db 733 { "rol", OP_ROL, 2, 2, OPF_DATA|OPF_FLAGS },
734 { "ror", OP_ROR, 2, 2, OPF_DATA|OPF_FLAGS },
5101a5f9 735 { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC },
69a3cdfc 736 { "sbb", OP_SBB, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC },
737 { "inc", OP_INC, 1, 1, OPF_DATA|OPF_FLAGS },
738 { "dec", OP_DEC, 1, 1, OPF_DATA|OPF_FLAGS },
5101a5f9 739 { "neg", OP_NEG, 1, 1, OPF_DATA|OPF_FLAGS },
740 { "mul", OP_MUL, 1, 1, OPF_DATA|OPF_FLAGS },
69a3cdfc 741 { "imul", OP_IMUL, 1, 3, OPF_DATA|OPF_FLAGS },
5101a5f9 742 { "div", OP_DIV, 1, 1, OPF_DATA|OPF_FLAGS },
743 { "idiv", OP_IDIV, 1, 1, OPF_DATA|OPF_FLAGS },
69a3cdfc 744 { "test", OP_TEST, 2, 2, OPF_FLAGS },
745 { "cmp", OP_CMP, 2, 2, OPF_FLAGS },
a3684be1 746 { "retn", OP_RET, 0, 1, OPF_TAIL },
de50b98b 747 { "call", OP_CALL, 1, 1, OPF_JMP|OPF_DATA|OPF_FLAGS },
69a3cdfc 748 { "jmp", OP_JMP, 1, 1, OPF_JMP },
749 { "jo", OP_JO, 1, 1, OPF_JMP|OPF_CC }, // 70 OF=1
750 { "jno", OP_JNO, 1, 1, OPF_JMP|OPF_CC }, // 71 OF=0
751 { "jc", OP_JC, 1, 1, OPF_JMP|OPF_CC }, // 72 CF=1
752 { "jb", OP_JC, 1, 1, OPF_JMP|OPF_CC }, // 72
753 { "jnc", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73 CF=0
33c35af6 754 { "jnb", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73
69a3cdfc 755 { "jae", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73
756 { "jz", OP_JZ, 1, 1, OPF_JMP|OPF_CC }, // 74 ZF=1
757 { "je", OP_JZ, 1, 1, OPF_JMP|OPF_CC }, // 74
758 { "jnz", OP_JNZ, 1, 1, OPF_JMP|OPF_CC }, // 75 ZF=0
759 { "jne", OP_JNZ, 1, 1, OPF_JMP|OPF_CC }, // 75
760 { "jbe", OP_JBE, 1, 1, OPF_JMP|OPF_CC }, // 76 CF=1 || ZF=1
761 { "jna", OP_JBE, 1, 1, OPF_JMP|OPF_CC }, // 76
762 { "ja", OP_JA, 1, 1, OPF_JMP|OPF_CC }, // 77 CF=0 && ZF=0
763 { "jnbe", OP_JA, 1, 1, OPF_JMP|OPF_CC }, // 77
764 { "js", OP_JS, 1, 1, OPF_JMP|OPF_CC }, // 78 SF=1
765 { "jns", OP_JNS, 1, 1, OPF_JMP|OPF_CC }, // 79 SF=0
766 { "jp", OP_JP, 1, 1, OPF_JMP|OPF_CC }, // 7a PF=1
767 { "jpe", OP_JP, 1, 1, OPF_JMP|OPF_CC }, // 7a
768 { "jnp", OP_JNP, 1, 1, OPF_JMP|OPF_CC }, // 7b PF=0
769 { "jpo", OP_JNP, 1, 1, OPF_JMP|OPF_CC }, // 7b
770 { "jl", OP_JL, 1, 1, OPF_JMP|OPF_CC }, // 7c SF!=OF
771 { "jnge", OP_JL, 1, 1, OPF_JMP|OPF_CC }, // 7c
772 { "jge", OP_JGE, 1, 1, OPF_JMP|OPF_CC }, // 7d SF=OF
773 { "jnl", OP_JGE, 1, 1, OPF_JMP|OPF_CC }, // 7d
774 { "jle", OP_JLE, 1, 1, OPF_JMP|OPF_CC }, // 7e ZF=1 || SF!=OF
775 { "jng", OP_JLE, 1, 1, OPF_JMP|OPF_CC }, // 7e
776 { "jg", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f ZF=0 && SF=OF
777 { "jnle", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f
5101a5f9 778 { "seto", OP_JO, 1, 1, OPF_DATA|OPF_CC },
779 { "setno", OP_JNO, 1, 1, OPF_DATA|OPF_CC },
780 { "setc", OP_JC, 1, 1, OPF_DATA|OPF_CC },
781 { "setb", OP_JC, 1, 1, OPF_DATA|OPF_CC },
782 { "setnc", OP_JNC, 1, 1, OPF_DATA|OPF_CC },
783 { "setae", OP_JNC, 1, 1, OPF_DATA|OPF_CC },
784 { "setz", OP_JZ, 1, 1, OPF_DATA|OPF_CC },
785 { "sete", OP_JZ, 1, 1, OPF_DATA|OPF_CC },
786 { "setnz", OP_JNZ, 1, 1, OPF_DATA|OPF_CC },
787 { "setne", OP_JNZ, 1, 1, OPF_DATA|OPF_CC },
788 { "setbe", OP_JBE, 1, 1, OPF_DATA|OPF_CC },
789 { "setna", OP_JBE, 1, 1, OPF_DATA|OPF_CC },
790 { "seta", OP_JA, 1, 1, OPF_DATA|OPF_CC },
791 { "setnbe", OP_JA, 1, 1, OPF_DATA|OPF_CC },
792 { "sets", OP_JS, 1, 1, OPF_DATA|OPF_CC },
793 { "setns", OP_JNS, 1, 1, OPF_DATA|OPF_CC },
794 { "setp", OP_JP, 1, 1, OPF_DATA|OPF_CC },
795 { "setpe", OP_JP, 1, 1, OPF_DATA|OPF_CC },
796 { "setnp", OP_JNP, 1, 1, OPF_DATA|OPF_CC },
797 { "setpo", OP_JNP, 1, 1, OPF_DATA|OPF_CC },
798 { "setl", OP_JL, 1, 1, OPF_DATA|OPF_CC },
799 { "setnge", OP_JL, 1, 1, OPF_DATA|OPF_CC },
800 { "setge", OP_JGE, 1, 1, OPF_DATA|OPF_CC },
801 { "setnl", OP_JGE, 1, 1, OPF_DATA|OPF_CC },
802 { "setle", OP_JLE, 1, 1, OPF_DATA|OPF_CC },
803 { "setng", OP_JLE, 1, 1, OPF_DATA|OPF_CC },
804 { "setg", OP_JG, 1, 1, OPF_DATA|OPF_CC },
805 { "setnle", OP_JG, 1, 1, OPF_DATA|OPF_CC },
69a3cdfc 806};
c36e914d 807
808static void parse_op(struct parsed_op *op, char words[16][256], int wordc)
809{
bfa4a6ee 810 enum opr_lenmod lmod = OPLM_UNSPEC;
33c35af6 811 int prefix_flags = 0;
69a3cdfc 812 int regmask_ind;
813 int regmask;
33c35af6 814 int op_w = 0;
91977a1c 815 int opr = 0;
33c35af6 816 int w = 0;
91977a1c 817 int i;
c36e914d 818
33c35af6 819 for (i = 0; i < ARRAY_SIZE(pref_table); i++) {
820 if (IS(words[w], pref_table[i].name)) {
821 prefix_flags = pref_table[i].flags;
822 break;
823 }
824 }
825
826 if (prefix_flags) {
827 if (wordc <= 1)
828 aerr("lone prefix: '%s'\n", words[0]);
829 w++;
830 }
831
832 op_w = w;
91977a1c 833 for (i = 0; i < ARRAY_SIZE(op_table); i++) {
33c35af6 834 if (IS(words[w], op_table[i].name))
69a3cdfc 835 break;
836 }
c36e914d 837
69a3cdfc 838 if (i == ARRAY_SIZE(op_table))
839 aerr("unhandled op: '%s'\n", words[0]);
33c35af6 840 w++;
c36e914d 841
69a3cdfc 842 op->op = op_table[i].op;
33c35af6 843 op->flags = op_table[i].flags | prefix_flags;
69a3cdfc 844 op->regmask_src = op->regmask_dst = 0;
845
846 for (opr = 0; opr < op_table[i].minopr; opr++) {
847 regmask = regmask_ind = 0;
848 w = parse_operand(&op->operand[opr], &regmask, &regmask_ind,
849 words, wordc, w, op->flags);
850
851 if (opr == 0 && (op->flags & OPF_DATA))
852 op->regmask_dst = regmask;
853 // for now, mark dst as src too
854 op->regmask_src |= regmask | regmask_ind;
855 }
c36e914d 856
69a3cdfc 857 for (; w < wordc && opr < op_table[i].maxopr; opr++) {
858 w = parse_operand(&op->operand[opr],
859 &op->regmask_src, &op->regmask_src,
860 words, wordc, w, op->flags);
91977a1c 861 }
c36e914d 862
91977a1c 863 if (w < wordc)
864 aerr("parse_op %s incomplete: %d/%d\n",
865 words[0], w, wordc);
5101a5f9 866
867 // special cases
868 op->operand_cnt = opr;
869 if (!strncmp(op_table[i].name, "set", 3))
870 op->operand[0].lmod = OPLM_BYTE;
871
872 // ops with implicit argumets
873 switch (op->op) {
874 case OP_CDQ:
875 op->operand_cnt = 2;
876 setup_reg_opr(&op->operand[0], xDX, OPLM_DWORD, &op->regmask_dst);
877 setup_reg_opr(&op->operand[1], xAX, OPLM_DWORD, &op->regmask_src);
878 break;
879
33c35af6 880 case OP_STOS:
881 if (op->operand_cnt != 0)
882 break;
883 if (IS(words[op_w], "stosb"))
884 lmod = OPLM_BYTE;
885 else if (IS(words[op_w], "stosw"))
886 lmod = OPLM_WORD;
887 else if (IS(words[op_w], "stosd"))
888 lmod = OPLM_DWORD;
889 op->operand_cnt = 3;
d4e3b5db 890 setup_reg_opr(&op->operand[0], xDI, lmod, &op->regmask_src);
891 setup_reg_opr(&op->operand[1], xCX, OPLM_DWORD, &op->regmask_src);
892 op->regmask_dst = op->regmask_src;
33c35af6 893 setup_reg_opr(&op->operand[2], xAX, OPLM_DWORD, &op->regmask_src);
894 break;
895
d4e3b5db 896 case OP_MOVS:
7ba45c34 897 case OP_CMPS:
d4e3b5db 898 if (op->operand_cnt != 0)
899 break;
7ba45c34 900 if (words[op_w][4] == 'b')
d4e3b5db 901 lmod = OPLM_BYTE;
7ba45c34 902 else if (words[op_w][4] == 'w')
d4e3b5db 903 lmod = OPLM_WORD;
7ba45c34 904 else if (words[op_w][4] == 'd')
d4e3b5db 905 lmod = OPLM_DWORD;
906 op->operand_cnt = 3;
907 setup_reg_opr(&op->operand[0], xDI, lmod, &op->regmask_src);
908 setup_reg_opr(&op->operand[1], xSI, OPLM_DWORD, &op->regmask_src);
909 setup_reg_opr(&op->operand[2], xCX, OPLM_DWORD, &op->regmask_src);
910 op->regmask_dst = op->regmask_src;
911 break;
912
5101a5f9 913 case OP_IMUL:
914 if (op->operand_cnt != 1)
915 break;
916 // fallthrough
917 case OP_MUL:
918 // singleop mul
919 op->regmask_dst = (1 << xDX) | (1 << xAX);
920 op->regmask_src |= (1 << xAX);
921 if (op->operand[0].lmod == OPLM_UNSPEC)
922 op->operand[0].lmod = OPLM_DWORD;
923 break;
924
925 case OP_DIV:
926 case OP_IDIV:
927 // we could set up operands for edx:eax, but there is no real need to
928 // (see is_opr_modified())
929 regmask = (1 << xDX) | (1 << xAX);
930 op->regmask_dst = regmask;
931 op->regmask_src |= regmask;
932 if (op->operand[0].lmod == OPLM_UNSPEC)
933 op->operand[0].lmod = OPLM_DWORD;
934 break;
935
936 case OP_SHL:
937 case OP_SHR:
938 case OP_SAR:
d4e3b5db 939 case OP_ROL:
940 case OP_ROR:
5101a5f9 941 if (op->operand[1].lmod == OPLM_UNSPEC)
942 op->operand[1].lmod = OPLM_BYTE;
943 break;
944
7ba45c34 945 case OP_PUSH:
946 if (op->operand[0].lmod == OPLM_UNSPEC
947 && (op->operand[0].type == OPT_CONST
948 || op->operand[0].type == OPT_OFFSET
949 || op->operand[0].type == OPT_LABEL))
950 op->operand[0].lmod = OPLM_DWORD;
951 break;
952
3ebea2cf 953 // alignment
954 case OP_MOV:
955 if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG
956 && op->operand[0].reg == xDI && op->operand[1].reg == xDI)
957 {
958 op->flags |= OPF_RMD;
959 }
960 break;
961
de50b98b 962 case OP_LEA:
963 if (op->operand[0].type == OPT_REG
964 && op->operand[1].type == OPT_REGMEM)
965 {
966 char buf[16];
967 snprintf(buf, sizeof(buf), "%s+0", op->operand[0].name);
968 if (IS(buf, op->operand[1].name))
969 op->flags |= OPF_RMD;
970 }
971 break;
972
89ff3147 973 case OP_CALL:
974 // trashed regs must be explicitly detected later
975 op->regmask_dst = 0;
976 break;
977
5101a5f9 978 default:
979 break;
980 }
c36e914d 981}
982
850c9265 983static const char *op_name(enum op_op op)
984{
985 int i;
986
987 for (i = 0; i < ARRAY_SIZE(op_table); i++)
988 if (op_table[i].op == op)
989 return op_table[i].name;
990
991 return "???";
992}
993
994// debug
995static const char *dump_op(struct parsed_op *po)
996{
997 static char out[128];
998 char *p = out;
999 int i;
1000
4c45fa73 1001 if (po == NULL)
1002 return "???";
1003
850c9265 1004 snprintf(out, sizeof(out), "%s", op_name(po->op));
1005 for (i = 0; i < po->operand_cnt; i++) {
1006 p += strlen(p);
1007 if (i > 0)
1008 *p++ = ',';
1009 snprintf(p, sizeof(out) - (p - out),
1010 po->operand[i].type == OPT_REGMEM ? " [%s]" : " %s",
1011 po->operand[i].name);
1012 }
1013
1014 return out;
1015}
1016
4c45fa73 1017static const char *lmod_type_u(struct parsed_op *po,
1018 enum opr_lenmod lmod)
1019{
1020 switch (lmod) {
1021 case OPLM_DWORD:
1022 return "u32";
1023 case OPLM_WORD:
1024 return "u16";
1025 case OPLM_BYTE:
1026 return "u8";
1027 default:
1028 ferr(po, "invalid lmod: %d\n", lmod);
1029 return "(_invalid_)";
1030 }
1031}
1032
d4e3b5db 1033static const char *lmod_cast_u(struct parsed_op *po,
1034 enum opr_lenmod lmod)
1035{
1036 switch (lmod) {
1037 case OPLM_DWORD:
1038 return "";
1039 case OPLM_WORD:
1040 return "(u16)";
1041 case OPLM_BYTE:
1042 return "(u8)";
1043 default:
1044 ferr(po, "invalid lmod: %d\n", lmod);
1045 return "(_invalid_)";
1046 }
1047}
1048
1049static const char *lmod_cast_u_ptr(struct parsed_op *po,
1050 enum opr_lenmod lmod)
1051{
1052 switch (lmod) {
1053 case OPLM_DWORD:
1054 return "*(u32 *)";
1055 case OPLM_WORD:
1056 return "*(u16 *)";
1057 case OPLM_BYTE:
1058 return "*(u8 *)";
1059 default:
1060 ferr(po, "invalid lmod: %d\n", lmod);
1061 return "(_invalid_)";
1062 }
1063}
1064
1065static const char *lmod_cast_s(struct parsed_op *po,
1066 enum opr_lenmod lmod)
1067{
1068 switch (lmod) {
1069 case OPLM_DWORD:
1070 return "(s32)";
1071 case OPLM_WORD:
1072 return "(s16)";
1073 case OPLM_BYTE:
1074 return "(s8)";
1075 default:
1076 ferr(po, "%s: invalid lmod: %d\n", __func__, lmod);
1077 return "(_invalid_)";
1078 }
1079}
1080
1081static const char *lmod_cast(struct parsed_op *po,
1082 enum opr_lenmod lmod, int is_signed)
1083{
1084 return is_signed ?
1085 lmod_cast_s(po, lmod) :
1086 lmod_cast_u(po, lmod);
1087}
1088
1089static int lmod_bytes(struct parsed_op *po, enum opr_lenmod lmod)
1090{
1091 switch (lmod) {
1092 case OPLM_DWORD:
1093 return 4;
1094 case OPLM_WORD:
1095 return 2;
1096 case OPLM_BYTE:
1097 return 1;
1098 default:
1099 ferr(po, "%s: invalid lmod: %d\n", __func__, lmod);
1100 return 0;
1101 }
1102}
1103
91977a1c 1104static const char *opr_name(struct parsed_op *po, int opr_num)
c36e914d 1105{
91977a1c 1106 if (opr_num >= po->operand_cnt)
1107 ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt);
1108 return po->operand[opr_num].name;
c36e914d 1109}
1110
91977a1c 1111static unsigned int opr_const(struct parsed_op *po, int opr_num)
c36e914d 1112{
91977a1c 1113 if (opr_num >= po->operand_cnt)
1114 ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt);
1115 if (po->operand[opr_num].type != OPT_CONST)
1116 ferr(po, "opr %d: const expected\n", opr_num);
1117 return po->operand[opr_num].val;
1118}
c36e914d 1119
91977a1c 1120static const char *opr_reg_p(struct parsed_op *po, struct parsed_opr *popr)
1121{
1122 if ((unsigned int)popr->reg >= MAX_REGS)
1123 ferr(po, "invalid reg: %d\n", popr->reg);
1124 return regs_r32[popr->reg];
1125}
c36e914d 1126
a2c1d768 1127// cast1 is the "final" cast
1128static const char *simplify_cast(const char *cast1, const char *cast2)
1129{
1130 static char buf[256];
1131
1132 if (cast1[0] == 0)
1133 return cast2;
1134 if (cast2[0] == 0)
1135 return cast1;
1136 if (IS(cast1, cast2))
1137 return cast1;
1138 if (IS(cast1, "(s8)") && IS(cast2, "(u8)"))
1139 return cast1;
1140 if (IS(cast1, "(s16)") && IS(cast2, "(u16)"))
1141 return cast1;
1142 if (IS(cast1, "(u8)") && IS_START(cast2, "*(u8 *)"))
1143 return cast2;
1144 if (IS(cast1, "(u16)") && IS_START(cast2, "*(u16 *)"))
1145 return cast2;
1cd4a663 1146 if (strchr(cast1, '*') && IS_START(cast2, "(u32)"))
1147 return cast1;
a2c1d768 1148
1149 snprintf(buf, sizeof(buf), "%s%s", cast1, cast2);
1150 return buf;
1151}
1152
1153static const char *simplify_cast_num(const char *cast, unsigned int val)
1154{
1155 if (IS(cast, "(u8)") && val < 0x100)
1156 return "";
1157 if (IS(cast, "(s8)") && val < 0x80)
1158 return "";
1159 if (IS(cast, "(u16)") && val < 0x10000)
1160 return "";
1161 if (IS(cast, "(s16)") && val < 0x8000)
1162 return "";
1163 if (IS(cast, "(s32)") && val < 0x80000000)
1164 return "";
1165
1166 return cast;
1167}
1168
39b168b8 1169static struct parsed_equ *equ_find(struct parsed_op *po, const char *name,
1170 int *extra_offs)
91977a1c 1171{
39b168b8 1172 const char *p;
1173 char *endp;
1174 int namelen;
850c9265 1175 int i;
1176
39b168b8 1177 *extra_offs = 0;
1178 namelen = strlen(name);
1179
1180 p = strchr(name, '+');
1181 if (p != NULL) {
1182 namelen = p - name;
1183 if (namelen <= 0)
1184 ferr(po, "equ parse failed for '%s'\n", name);
1185
1186 if (IS_START(p, "0x"))
1187 p += 2;
1188 *extra_offs = strtol(p, &endp, 16);
1189 if (*endp != 0)
1190 ferr(po, "equ parse failed for '%s'\n", name);
1191 }
1192
850c9265 1193 for (i = 0; i < g_eqcnt; i++)
39b168b8 1194 if (strncmp(g_eqs[i].name, name, namelen) == 0
1195 && g_eqs[i].name[namelen] == 0)
850c9265 1196 break;
87bf6cec 1197 if (i >= g_eqcnt) {
1198 if (po != NULL)
1199 ferr(po, "unresolved equ name: '%s'\n", name);
1200 return NULL;
1201 }
850c9265 1202
1203 return &g_eqs[i];
1204}
1205
1cd4a663 1206static int is_stack_access(struct parsed_op *po,
1207 const struct parsed_opr *popr)
850c9265 1208{
1cd4a663 1209 return (parse_stack_el(popr->name, NULL)
1210 || (g_bp_frame && !(po->flags & OPF_EBP_S)
1211 && IS_START(popr->name, "ebp")));
1212}
1213
1214static void parse_stack_access(struct parsed_op *po,
1215 const char *name, char *ofs_reg, int *offset_out,
1216 int *stack_ra_out, const char **bp_arg_out)
1217{
1218 const char *bp_arg = "";
1219 const char *p = NULL;
91977a1c 1220 struct parsed_equ *eq;
4f12f671 1221 char *endp = NULL;
d4e3b5db 1222 int stack_ra = 0;
39b168b8 1223 int offset = 0;
91977a1c 1224
1cd4a663 1225 ofs_reg[0] = 0;
a3684be1 1226
1227 if (IS_START(name, "ebp-")
1228 || (IS_START(name, "ebp+") && '0' <= name[4] && name[4] <= '9'))
1229 {
1230 p = name + 4;
1231 if (IS_START(p, "0x"))
1232 p += 2;
1233 offset = strtoul(p, &endp, 16);
1234 if (name[3] == '-')
1235 offset = -offset;
1236 if (*endp != 0)
1237 ferr(po, "ebp- parse of '%s' failed\n", name);
1238 }
1239 else {
4f12f671 1240 bp_arg = parse_stack_el(name, ofs_reg);
1241 snprintf(g_comment, sizeof(g_comment), "%s", bp_arg);
1242 eq = equ_find(po, bp_arg, &offset);
1243 if (eq == NULL)
1244 ferr(po, "detected but missing eq\n");
1245 offset += eq->offset;
1246 }
39b168b8 1247
d4e3b5db 1248 if (!strncmp(name, "ebp", 3))
1249 stack_ra = 4;
1250
94d447fb 1251 if (ofs_reg[0] == 0 && stack_ra <= offset && offset < stack_ra + 4)
39b168b8 1252 ferr(po, "reference to ra? %d %d\n", offset, stack_ra);
d4e3b5db 1253
1cd4a663 1254 *offset_out = offset;
1255 *stack_ra_out = stack_ra;
1256 if (bp_arg_out)
1257 *bp_arg_out = bp_arg;
1258}
1259
1260static void stack_frame_access(struct parsed_op *po,
1261 struct parsed_opr *popr, char *buf, size_t buf_size,
1262 const char *name, const char *cast, int is_src, int is_lea)
1263{
1264 enum opr_lenmod tmp_lmod = OPLM_UNSPEC;
1265 const char *prefix = "";
1266 const char *bp_arg = NULL;
1267 char ofs_reg[16] = { 0, };
1268 int i, arg_i, arg_s;
1269 int unaligned = 0;
1270 int stack_ra = 0;
1271 int offset = 0;
1272 int sf_ofs;
1273 int lim;
1274
1275 if (po->flags & OPF_EBP_S)
1276 ferr(po, "stack_frame_access while ebp is scratch\n");
1277
1278 parse_stack_access(po, name, ofs_reg, &offset, &stack_ra, &bp_arg);
1279
4f12f671 1280 if (offset > stack_ra)
1281 {
39b168b8 1282 arg_i = (offset - stack_ra - 4) / 4;
bd96f656 1283 if (arg_i < 0 || arg_i >= g_func_pp->argc_stack)
4f12f671 1284 {
bd96f656 1285 if (g_func_pp->is_vararg
1286 && arg_i == g_func_pp->argc_stack && is_lea)
1287 {
4f12f671 1288 // should be va_list
1289 if (cast[0] == 0)
1290 cast = "(u32)";
1291 snprintf(buf, buf_size, "%sap", cast);
1292 return;
1293 }
1294 ferr(po, "offset %d (%s,%d) doesn't map to any arg\n",
1295 offset, bp_arg, arg_i);
1296 }
4c45fa73 1297 if (ofs_reg[0] != 0)
7ba45c34 1298 ferr(po, "offset reg on arg access?\n");
91977a1c 1299
bd96f656 1300 for (i = arg_s = 0; i < g_func_pp->argc; i++) {
1301 if (g_func_pp->arg[i].reg != NULL)
91977a1c 1302 continue;
1303 if (arg_s == arg_i)
1304 break;
1305 arg_s++;
1306 }
bd96f656 1307 if (i == g_func_pp->argc)
91977a1c 1308 ferr(po, "arg %d not in prototype?\n", arg_i);
850c9265 1309
bd96f656 1310 popr->is_ptr = g_func_pp->arg[i].type.is_ptr;
de50b98b 1311
1312 switch (popr->lmod)
7ba45c34 1313 {
1314 case OPLM_BYTE:
4f12f671 1315 if (is_lea)
1316 ferr(po, "lea/byte to arg?\n");
7ba45c34 1317 if (is_src && (offset & 3) == 0)
a2c1d768 1318 snprintf(buf, buf_size, "%sa%d",
1319 simplify_cast(cast, "(u8)"), i + 1);
7ba45c34 1320 else
a2c1d768 1321 snprintf(buf, buf_size, "%sBYTE%d(a%d)",
1322 cast, offset & 3, i + 1);
7ba45c34 1323 break;
1324
1325 case OPLM_WORD:
4f12f671 1326 if (is_lea)
1327 ferr(po, "lea/word to arg?\n");
a3684be1 1328 if (offset & 1) {
1329 unaligned = 1;
1330 if (!is_src) {
1331 if (offset & 2)
1332 ferr(po, "problematic arg store\n");
a2c1d768 1333 snprintf(buf, buf_size, "%s((char *)&a%d + 1)",
1334 simplify_cast(cast, "*(u16 *)"), i + 1);
a3684be1 1335 }
1336 else
1337 ferr(po, "unaligned arg word load\n");
1338 }
1339 else if (is_src && (offset & 2) == 0)
a2c1d768 1340 snprintf(buf, buf_size, "%sa%d",
1341 simplify_cast(cast, "(u16)"), i + 1);
7ba45c34 1342 else
a2c1d768 1343 snprintf(buf, buf_size, "%s%sWORD(a%d)",
1344 cast, (offset & 2) ? "HI" : "LO", i + 1);
7ba45c34 1345 break;
1346
1347 case OPLM_DWORD:
3ebea2cf 1348 if (cast[0])
1349 prefix = cast;
1350 else if (is_src)
1351 prefix = "(u32)";
a3684be1 1352
de50b98b 1353 if (offset & 3) {
a3684be1 1354 unaligned = 1;
2b43685d 1355 if (is_lea)
1356 snprintf(buf, buf_size, "(u32)&a%d + %d",
1357 i + 1, offset & 3);
a3684be1 1358 else if (!is_src)
1359 ferr(po, "unaligned arg store\n");
1360 else {
1361 // mov edx, [ebp+arg_4+2]; movsx ecx, dx
2b43685d 1362 snprintf(buf, buf_size, "%s(a%d >> %d)",
1363 prefix, i + 1, (offset & 3) * 8);
a3684be1 1364 }
de50b98b 1365 }
1366 else {
1367 snprintf(buf, buf_size, "%s%sa%d",
1368 prefix, is_lea ? "&" : "", i + 1);
1369 }
7ba45c34 1370 break;
1371
1372 default:
de50b98b 1373 ferr(po, "bp_arg bad lmod: %d\n", popr->lmod);
7ba45c34 1374 }
1375
a3684be1 1376 if (unaligned)
1377 snprintf(g_comment, sizeof(g_comment), "%s unaligned", bp_arg);
1378
7ba45c34 1379 // common problem
bd96f656 1380 guess_lmod_from_c_type(&tmp_lmod, &g_func_pp->arg[i].type);
a2c1d768 1381 if (tmp_lmod != OPLM_DWORD
1382 && (unaligned || (!is_src && tmp_lmod < popr->lmod)))
1383 {
1384 ferr(po, "bp_arg arg%d/w offset %d and type '%s' is too small\n",
1385 i + 1, offset, g_func_pp->arg[i].type.name);
1386 }
46411e6c 1387 if (popr->is_ptr && popr->lmod != OPLM_DWORD)
1388 ferr(po, "bp_arg arg%d: non-dword ptr access\n", i + 1);
91977a1c 1389 }
4f12f671 1390 else
1391 {
1bafb621 1392 if (g_stack_fsz == 0)
1393 ferr(po, "stack var access without stackframe\n");
a2c1d768 1394 g_stack_frame_used = 1;
850c9265 1395
39b168b8 1396 sf_ofs = g_stack_fsz + offset;
de50b98b 1397 lim = (ofs_reg[0] != 0) ? -4 : 0;
1398 if (offset > 0 || sf_ofs < lim)
39b168b8 1399 ferr(po, "bp_stack offset %d/%d\n", offset, g_stack_fsz);
850c9265 1400
1401 if (is_lea)
33c35af6 1402 prefix = "(u32)&";
3ebea2cf 1403 else
1404 prefix = cast;
850c9265 1405
de50b98b 1406 switch (popr->lmod)
850c9265 1407 {
1408 case OPLM_BYTE:
7ba45c34 1409 snprintf(buf, buf_size, "%ssf.b[%d%s%s]",
1410 prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg);
850c9265 1411 break;
7ba45c34 1412
850c9265 1413 case OPLM_WORD:
7ba45c34 1414 if ((sf_ofs & 1) || ofs_reg[0] != 0) {
1415 // known unaligned or possibly unaligned
1416 strcat(g_comment, " unaligned");
1417 if (prefix[0] == 0)
1418 prefix = "*(u16 *)&";
1419 snprintf(buf, buf_size, "%ssf.b[%d%s%s]",
1420 prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg);
1421 break;
1422 }
1423 snprintf(buf, buf_size, "%ssf.w[%d]", prefix, sf_ofs / 2);
850c9265 1424 break;
7ba45c34 1425
850c9265 1426 case OPLM_DWORD:
7ba45c34 1427 if ((sf_ofs & 3) || ofs_reg[0] != 0) {
1428 // known unaligned or possibly unaligned
1429 strcat(g_comment, " unaligned");
1430 if (prefix[0] == 0)
1431 prefix = "*(u32 *)&";
1432 snprintf(buf, buf_size, "%ssf.b[%d%s%s]",
1433 prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg);
1434 break;
1435 }
1436 snprintf(buf, buf_size, "%ssf.d[%d]", prefix, sf_ofs / 4);
850c9265 1437 break;
7ba45c34 1438
850c9265 1439 default:
de50b98b 1440 ferr(po, "bp_stack bad lmod: %d\n", popr->lmod);
850c9265 1441 }
91977a1c 1442 }
1443}
c36e914d 1444
89ff3147 1445static void check_func_pp(struct parsed_op *po,
1446 const struct parsed_proto *pp, const char *pfx)
1447{
1448 if (pp->argc_reg != 0) {
1449 if (!g_allow_regfunc)
1450 ferr(po, "%s: reg arg in arg-call unhandled yet\n", pfx);
1451 if (pp->argc_stack > 0 && pp->argc_reg != 2)
1452 ferr(po, "%s: %d reg arg(s) with %d stack arg(s)\n",
1453 pfx, pp->argc_reg, pp->argc_stack);
1454 }
1455}
1456
3ebea2cf 1457static void check_label_read_ref(struct parsed_op *po, const char *name)
1458{
840257f6 1459 const struct parsed_proto *pp;
1460
36595fd2 1461 pp = proto_parse(g_fhdr, name, 0);
840257f6 1462 if (pp == NULL)
1463 ferr(po, "proto_parse failed for ref '%s'\n", name);
1464
89ff3147 1465 if (pp->is_func)
1466 check_func_pp(po, pp, "ref");
3ebea2cf 1467}
1468
91977a1c 1469static char *out_src_opr(char *buf, size_t buf_size,
3ebea2cf 1470 struct parsed_op *po, struct parsed_opr *popr, const char *cast,
1471 int is_lea)
91977a1c 1472{
850c9265 1473 char tmp1[256], tmp2[256];
1474 char expr[256];
a2c1d768 1475 char *p;
850c9265 1476 int ret;
1477
3ebea2cf 1478 if (cast == NULL)
1479 cast = "";
1480
91977a1c 1481 switch (popr->type) {
1482 case OPT_REG:
850c9265 1483 if (is_lea)
1484 ferr(po, "lea from reg?\n");
1485
91977a1c 1486 switch (popr->lmod) {
1487 case OPLM_DWORD:
3ebea2cf 1488 snprintf(buf, buf_size, "%s%s", cast, opr_reg_p(po, popr));
91977a1c 1489 break;
850c9265 1490 case OPLM_WORD:
a2c1d768 1491 snprintf(buf, buf_size, "%s%s",
1492 simplify_cast(cast, "(u16)"), opr_reg_p(po, popr));
850c9265 1493 break;
1494 case OPLM_BYTE:
5101a5f9 1495 if (popr->name[1] == 'h') // XXX..
a2c1d768 1496 snprintf(buf, buf_size, "%s(%s >> 8)",
1497 simplify_cast(cast, "(u8)"), opr_reg_p(po, popr));
5101a5f9 1498 else
a2c1d768 1499 snprintf(buf, buf_size, "%s%s",
1500 simplify_cast(cast, "(u8)"), opr_reg_p(po, popr));
850c9265 1501 break;
91977a1c 1502 default:
1503 ferr(po, "invalid src lmod: %d\n", popr->lmod);
1504 }
1505 break;
850c9265 1506
91977a1c 1507 case OPT_REGMEM:
1cd4a663 1508 if (is_stack_access(po, popr)) {
de50b98b 1509 stack_frame_access(po, popr, buf, buf_size,
3ebea2cf 1510 popr->name, cast, 1, is_lea);
91977a1c 1511 break;
1512 }
850c9265 1513
1514 strcpy(expr, popr->name);
1515 if (strchr(expr, '[')) {
1516 // special case: '[' can only be left for label[reg] form
1517 ret = sscanf(expr, "%[^[][%[^]]]", tmp1, tmp2);
1518 if (ret != 2)
1519 ferr(po, "parse failure for '%s'\n", expr);
a2c1d768 1520 if (tmp1[0] == '(') {
1521 // (off_4FFF50+3)[eax]
1522 p = strchr(tmp1 + 1, ')');
1523 if (p == NULL || p[1] != 0)
1524 ferr(po, "parse failure (2) for '%s'\n", expr);
1525 *p = 0;
1526 memmove(tmp1, tmp1 + 1, strlen(tmp1));
1527 }
33c35af6 1528 snprintf(expr, sizeof(expr), "(u32)&%s + %s", tmp1, tmp2);
850c9265 1529 }
1530
1531 // XXX: do we need more parsing?
1532 if (is_lea) {
1533 snprintf(buf, buf_size, "%s", expr);
1534 break;
1535 }
1536
a2c1d768 1537 snprintf(buf, buf_size, "%s(%s)",
1538 simplify_cast(cast, lmod_cast_u_ptr(po, popr->lmod)), expr);
91977a1c 1539 break;
850c9265 1540
91977a1c 1541 case OPT_LABEL:
3ebea2cf 1542 check_label_read_ref(po, popr->name);
1543 if (cast[0] == 0 && popr->is_ptr)
1544 cast = "(u32)";
2b43685d 1545
850c9265 1546 if (is_lea)
1547 snprintf(buf, buf_size, "(u32)&%s", popr->name);
2b43685d 1548 else if (popr->size_lt)
1549 snprintf(buf, buf_size, "%s%s%s%s", cast,
1550 lmod_cast_u_ptr(po, popr->lmod),
1551 popr->is_array ? "" : "&",
1552 popr->name);
850c9265 1553 else
3ebea2cf 1554 snprintf(buf, buf_size, "%s%s%s", cast, popr->name,
7ba45c34 1555 popr->is_array ? "[0]" : "");
850c9265 1556 break;
1557
1558 case OPT_OFFSET:
3ebea2cf 1559 check_label_read_ref(po, popr->name);
1560 if (cast[0] == 0)
1561 cast = "(u32)";
850c9265 1562 if (is_lea)
1563 ferr(po, "lea an offset?\n");
3ebea2cf 1564 snprintf(buf, buf_size, "%s&%s", cast, popr->name);
91977a1c 1565 break;
850c9265 1566
91977a1c 1567 case OPT_CONST:
850c9265 1568 if (is_lea)
1569 ferr(po, "lea from const?\n");
1570
a2c1d768 1571 printf_number(tmp1, sizeof(tmp1), popr->val);
1572 snprintf(buf, buf_size, "%s%s",
1573 simplify_cast_num(cast, popr->val), tmp1);
91977a1c 1574 break;
850c9265 1575
91977a1c 1576 default:
1577 ferr(po, "invalid src type: %d\n", popr->type);
1578 }
1579
1580 return buf;
1581}
c36e914d 1582
de50b98b 1583// note: may set is_ptr (we find that out late for ebp frame..)
91977a1c 1584static char *out_dst_opr(char *buf, size_t buf_size,
1585 struct parsed_op *po, struct parsed_opr *popr)
1586{
1587 switch (popr->type) {
1588 case OPT_REG:
1589 switch (popr->lmod) {
1590 case OPLM_DWORD:
1591 snprintf(buf, buf_size, "%s", opr_reg_p(po, popr));
1592 break;
850c9265 1593 case OPLM_WORD:
1594 // ugh..
1595 snprintf(buf, buf_size, "LOWORD(%s)", opr_reg_p(po, popr));
1596 break;
1597 case OPLM_BYTE:
1598 // ugh..
5101a5f9 1599 if (popr->name[1] == 'h') // XXX..
1600 snprintf(buf, buf_size, "BYTE1(%s)", opr_reg_p(po, popr));
1601 else
1602 snprintf(buf, buf_size, "LOBYTE(%s)", opr_reg_p(po, popr));
850c9265 1603 break;
91977a1c 1604 default:
1605 ferr(po, "invalid dst lmod: %d\n", popr->lmod);
1606 }
1607 break;
850c9265 1608
1609 case OPT_REGMEM:
1cd4a663 1610 if (is_stack_access(po, popr)) {
de50b98b 1611 stack_frame_access(po, popr, buf, buf_size,
3ebea2cf 1612 popr->name, "", 0, 0);
850c9265 1613 break;
1614 }
1615
3ebea2cf 1616 return out_src_opr(buf, buf_size, po, popr, NULL, 0);
850c9265 1617
bfa4a6ee 1618 case OPT_LABEL:
2b43685d 1619 if (popr->size_mismatch)
1620 snprintf(buf, buf_size, "%s%s%s",
1621 lmod_cast_u_ptr(po, popr->lmod),
1622 popr->is_array ? "" : "&", popr->name);
1623 else
1624 snprintf(buf, buf_size, "%s%s", popr->name,
1625 popr->is_array ? "[0]" : "");
bfa4a6ee 1626 break;
1627
91977a1c 1628 default:
1629 ferr(po, "invalid dst type: %d\n", popr->type);
1630 }
1631
1632 return buf;
1633}
c36e914d 1634
3ebea2cf 1635static char *out_src_opr_u32(char *buf, size_t buf_size,
1636 struct parsed_op *po, struct parsed_opr *popr)
1637{
1638 return out_src_opr(buf, buf_size, po, popr, NULL, 0);
1639}
1640
69a3cdfc 1641static enum parsed_flag_op split_cond(struct parsed_op *po,
940e8e66 1642 enum op_op op, int *is_inv)
91977a1c 1643{
940e8e66 1644 *is_inv = 0;
91977a1c 1645
69a3cdfc 1646 switch (op) {
1647 case OP_JO:
1648 return PFO_O;
1649 case OP_JC:
1650 return PFO_C;
1651 case OP_JZ:
1652 return PFO_Z;
1653 case OP_JBE:
1654 return PFO_BE;
1655 case OP_JS:
1656 return PFO_S;
1657 case OP_JP:
1658 return PFO_P;
1659 case OP_JL:
1660 return PFO_L;
1661 case OP_JLE:
1662 return PFO_LE;
1663
91977a1c 1664 case OP_JNO:
940e8e66 1665 *is_inv = 1;
69a3cdfc 1666 return PFO_O;
91977a1c 1667 case OP_JNC:
940e8e66 1668 *is_inv = 1;
69a3cdfc 1669 return PFO_C;
91977a1c 1670 case OP_JNZ:
940e8e66 1671 *is_inv = 1;
69a3cdfc 1672 return PFO_Z;
1673 case OP_JA:
940e8e66 1674 *is_inv = 1;
69a3cdfc 1675 return PFO_BE;
91977a1c 1676 case OP_JNS:
940e8e66 1677 *is_inv = 1;
69a3cdfc 1678 return PFO_S;
91977a1c 1679 case OP_JNP:
940e8e66 1680 *is_inv = 1;
69a3cdfc 1681 return PFO_P;
850c9265 1682 case OP_JGE:
940e8e66 1683 *is_inv = 1;
69a3cdfc 1684 return PFO_L;
91977a1c 1685 case OP_JG:
940e8e66 1686 *is_inv = 1;
69a3cdfc 1687 return PFO_LE;
1688
1689 case OP_ADC:
1690 case OP_SBB:
1691 return PFO_C;
1692
91977a1c 1693 default:
69a3cdfc 1694 ferr(po, "split_cond: bad op %d\n", op);
1695 return -1;
91977a1c 1696 }
1697}
c36e914d 1698
91977a1c 1699static void out_test_for_cc(char *buf, size_t buf_size,
940e8e66 1700 struct parsed_op *po, enum parsed_flag_op pfo, int is_inv,
69a3cdfc 1701 enum opr_lenmod lmod, const char *expr)
91977a1c 1702{
69a3cdfc 1703 const char *cast, *scast;
91977a1c 1704
69a3cdfc 1705 cast = lmod_cast_u(po, lmod);
1706 scast = lmod_cast_s(po, lmod);
1707
1708 switch (pfo) {
1709 case PFO_Z:
87bf6cec 1710 case PFO_BE: // CF=1||ZF=1; CF=0
850c9265 1711 snprintf(buf, buf_size, "(%s%s %s 0)",
940e8e66 1712 cast, expr, is_inv ? "!=" : "==");
91977a1c 1713 break;
850c9265 1714
5101a5f9 1715 case PFO_S:
1716 case PFO_L: // SF!=OF; OF=0
1717 snprintf(buf, buf_size, "(%s%s %s 0)",
940e8e66 1718 scast, expr, is_inv ? ">=" : "<");
5101a5f9 1719 break;
1720
87bf6cec 1721 case PFO_LE: // ZF=1||SF!=OF; OF=0
69a3cdfc 1722 snprintf(buf, buf_size, "(%s%s %s 0)",
940e8e66 1723 scast, expr, is_inv ? ">" : "<=");
850c9265 1724 break;
1725
91977a1c 1726 default:
69a3cdfc 1727 ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo);
91977a1c 1728 }
1729}
c36e914d 1730
850c9265 1731static void out_cmp_for_cc(char *buf, size_t buf_size,
a2c1d768 1732 struct parsed_op *po, enum parsed_flag_op pfo, int is_inv)
850c9265 1733{
a2c1d768 1734 const char *cast, *scast, *cast_use;
1735 char buf1[256], buf2[256];
1736 enum opr_lenmod lmod;
1737
1738 if (po->operand[0].lmod != po->operand[1].lmod)
1739 ferr(po, "%s: lmod mismatch: %d %d\n", __func__,
1740 po->operand[0].lmod, po->operand[1].lmod);
1741 lmod = po->operand[0].lmod;
850c9265 1742
69a3cdfc 1743 cast = lmod_cast_u(po, lmod);
1744 scast = lmod_cast_s(po, lmod);
850c9265 1745
a2c1d768 1746 switch (pfo) {
1747 case PFO_C:
1748 case PFO_Z:
1749 case PFO_BE: // !a
1750 cast_use = cast;
1751 break;
1752
1753 case PFO_S:
1754 case PFO_L: // !ge
1755 case PFO_LE:
1756 cast_use = scast;
1757 break;
1758
1759 default:
1760 ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo);
1761 }
1762
1763 out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], cast_use, 0);
1764 out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], cast_use, 0);
1765
69a3cdfc 1766 switch (pfo) {
5101a5f9 1767 case PFO_C:
1768 // note: must be unsigned compare
a2c1d768 1769 snprintf(buf, buf_size, "(%s %s %s)",
1770 buf1, is_inv ? ">=" : "<", buf2);
5101a5f9 1771 break;
1772
69a3cdfc 1773 case PFO_Z:
a2c1d768 1774 snprintf(buf, buf_size, "(%s %s %s)",
1775 buf1, is_inv ? "!=" : "==", buf2);
850c9265 1776 break;
1777
5101a5f9 1778 case PFO_BE: // !a
850c9265 1779 // note: must be unsigned compare
a2c1d768 1780 snprintf(buf, buf_size, "(%s %s %s)",
1781 buf1, is_inv ? ">" : "<=", buf2);
1782
1783 // annoying case
1784 if (is_inv && lmod == OPLM_BYTE
1785 && po->operand[1].type == OPT_CONST
1786 && po->operand[1].val == 0xff)
1787 {
1788 snprintf(g_comment, sizeof(g_comment), "if %s", buf);
1789 snprintf(buf, buf_size, "(0)");
1790 }
5101a5f9 1791 break;
1792
1793 // note: must be signed compare
1794 case PFO_S:
1795 snprintf(buf, buf_size, "(%s(%s - %s) %s 0)",
a2c1d768 1796 scast, buf1, buf2, is_inv ? ">=" : "<");
850c9265 1797 break;
1798
5101a5f9 1799 case PFO_L: // !ge
a2c1d768 1800 snprintf(buf, buf_size, "(%s %s %s)",
1801 buf1, is_inv ? ">=" : "<", buf2);
850c9265 1802 break;
1803
5101a5f9 1804 case PFO_LE:
a2c1d768 1805 snprintf(buf, buf_size, "(%s %s %s)",
1806 buf1, is_inv ? ">" : "<=", buf2);
5101a5f9 1807 break;
1808
850c9265 1809 default:
a2c1d768 1810 break;
850c9265 1811 }
1812}
1813
69a3cdfc 1814static void out_cmp_test(char *buf, size_t buf_size,
940e8e66 1815 struct parsed_op *po, enum parsed_flag_op pfo, int is_inv)
69a3cdfc 1816{
1817 char buf1[256], buf2[256], buf3[256];
1818
1819 if (po->op == OP_TEST) {
1820 if (IS(opr_name(po, 0), opr_name(po, 1))) {
3ebea2cf 1821 out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[0]);
69a3cdfc 1822 }
1823 else {
3ebea2cf 1824 out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
1825 out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]);
69a3cdfc 1826 snprintf(buf3, sizeof(buf3), "(%s & %s)", buf1, buf2);
1827 }
940e8e66 1828 out_test_for_cc(buf, buf_size, po, pfo, is_inv,
69a3cdfc 1829 po->operand[0].lmod, buf3);
1830 }
1831 else if (po->op == OP_CMP) {
a2c1d768 1832 out_cmp_for_cc(buf, buf_size, po, pfo, is_inv);
69a3cdfc 1833 }
1834 else
1835 ferr(po, "%s: unhandled op: %d\n", __func__, po->op);
1836}
1837
850c9265 1838static void propagate_lmod(struct parsed_op *po, struct parsed_opr *popr1,
91977a1c 1839 struct parsed_opr *popr2)
1840{
1841 if (popr1->lmod == OPLM_UNSPEC && popr2->lmod == OPLM_UNSPEC)
1842 ferr(po, "missing lmod for both operands\n");
1843
1844 if (popr1->lmod == OPLM_UNSPEC)
1845 popr1->lmod = popr2->lmod;
1846 else if (popr2->lmod == OPLM_UNSPEC)
1847 popr2->lmod = popr1->lmod;
a3684be1 1848 else if (popr1->lmod != popr2->lmod) {
1849 if (popr1->type_from_var) {
1850 popr1->size_mismatch = 1;
1851 if (popr1->lmod < popr2->lmod)
1852 popr1->size_lt = 1;
1853 popr1->lmod = popr2->lmod;
1854 }
1855 else if (popr2->type_from_var) {
1856 popr2->size_mismatch = 1;
1857 if (popr2->lmod < popr1->lmod)
1858 popr2->size_lt = 1;
1859 popr2->lmod = popr1->lmod;
1860 }
1861 else
1862 ferr(po, "conflicting lmods: %d vs %d\n",
1863 popr1->lmod, popr2->lmod);
1864 }
91977a1c 1865}
c36e914d 1866
850c9265 1867static const char *op_to_c(struct parsed_op *po)
1868{
1869 switch (po->op)
1870 {
1871 case OP_ADD:
5101a5f9 1872 case OP_ADC:
850c9265 1873 return "+";
1874 case OP_SUB:
5101a5f9 1875 case OP_SBB:
850c9265 1876 return "-";
1877 case OP_AND:
1878 return "&";
1879 case OP_OR:
1880 return "|";
1881 case OP_XOR:
1882 return "^";
1883 case OP_SHL:
1884 return "<<";
1885 case OP_SHR:
1886 return ">>";
1887 case OP_MUL:
1888 case OP_IMUL:
1889 return "*";
1890 default:
1891 ferr(po, "op_to_c was supplied with %d\n", po->op);
1892 }
1893}
1894
7ae48d73 1895static void op_set_clear_flag(struct parsed_op *po,
1896 enum op_flags flag_set, enum op_flags flag_clear)
d4e3b5db 1897{
7ae48d73 1898 po->flags |= flag_set;
1899 po->flags &= ~flag_clear;
d4e3b5db 1900}
1901
de50b98b 1902// last op in stream - unconditional branch or ret
1903#define LAST_OP(_i) ((ops[_i].flags & OPF_TAIL) \
1904 || (ops[_i].flags & (OPF_JMP|OPF_CC)) == OPF_JMP)
1905
87bf6cec 1906static int scan_for_pop(int i, int opcnt, const char *reg,
d4e3b5db 1907 int magic, int depth, int *maxdepth, int do_flags)
850c9265 1908{
89ff3147 1909 const struct parsed_proto *pp;
87bf6cec 1910 struct parsed_op *po;
1911 int ret = 0;
4c45fa73 1912 int j;
87bf6cec 1913
850c9265 1914 for (; i < opcnt; i++) {
87bf6cec 1915 po = &ops[i];
1916 if (po->cc_scratch == magic)
1917 break; // already checked
1918 po->cc_scratch = magic;
1919
89ff3147 1920 if (po->flags & OPF_TAIL) {
1921 if (po->op == OP_CALL) {
1922 pp = proto_parse(g_fhdr, po->operand[0].name, 0);
1923 if (pp != NULL && pp->is_noreturn)
1924 // no stack cleanup for noreturn
1925 return ret;
1926 }
87bf6cec 1927 return -1; // deadend
89ff3147 1928 }
87bf6cec 1929
1bafb621 1930 if ((po->flags & OPF_RMD)
de50b98b 1931 || (po->op == OP_PUSH && po->argnum != 0)) // arg push
850c9265 1932 continue;
1933
87bf6cec 1934 if ((po->flags & OPF_JMP) && po->op != OP_CALL) {
4c45fa73 1935 if (po->btj != NULL) {
1936 // jumptable
da87ae38 1937 for (j = 0; j < po->btj->count; j++) {
4c45fa73 1938 ret |= scan_for_pop(po->btj->d[j].bt_i, opcnt, reg, magic,
1939 depth, maxdepth, do_flags);
1940 if (ret < 0)
1941 return ret; // dead end
1942 }
da87ae38 1943 return ret;
4c45fa73 1944 }
1945
87bf6cec 1946 if (po->bt_i < 0) {
1947 ferr(po, "dead branch\n");
1948 return -1;
1949 }
850c9265 1950
87bf6cec 1951 if (po->flags & OPF_CC) {
d4e3b5db 1952 ret |= scan_for_pop(po->bt_i, opcnt, reg, magic,
1953 depth, maxdepth, do_flags);
87bf6cec 1954 if (ret < 0)
1955 return ret; // dead end
1956 }
1957 else {
1958 i = po->bt_i - 1;
1959 }
1960 continue;
1961 }
1962
d4e3b5db 1963 if ((po->op == OP_POP || po->op == OP_PUSH)
1964 && po->operand[0].type == OPT_REG
87bf6cec 1965 && IS(po->operand[0].name, reg))
1966 {
da87ae38 1967 if (po->op == OP_PUSH && !(po->flags & OPF_FARG)) {
d4e3b5db 1968 depth++;
1969 if (depth > *maxdepth)
1970 *maxdepth = depth;
1971 if (do_flags)
7ae48d73 1972 op_set_clear_flag(po, OPF_RSAVE, OPF_RMD);
d4e3b5db 1973 }
da87ae38 1974 else if (po->op == OP_POP) {
1975 if (depth == 0) {
1976 if (do_flags)
1977 op_set_clear_flag(po, OPF_RMD, OPF_RSAVE);
1978 return 1;
1979 }
1980 else {
1981 depth--;
1982 if (depth < 0) // should not happen
1983 ferr(po, "fail with depth\n");
1984 if (do_flags)
1985 op_set_clear_flag(po, OPF_RSAVE, OPF_RMD);
1986 }
d4e3b5db 1987 }
87bf6cec 1988 }
850c9265 1989 }
1990
87bf6cec 1991 return ret;
850c9265 1992}
1993
69a3cdfc 1994// scan for pop starting from 'ret' op (all paths)
d4e3b5db 1995static int scan_for_pop_ret(int i, int opcnt, const char *reg,
1996 int flag_set)
850c9265 1997{
1998 int found = 0;
1999 int j;
2000
2001 for (; i < opcnt; i++) {
87bf6cec 2002 if (!(ops[i].flags & OPF_TAIL))
850c9265 2003 continue;
2004
2005 for (j = i - 1; j >= 0; j--) {
69a3cdfc 2006 if (ops[j].flags & OPF_RMD)
2007 continue;
2008 if (ops[j].flags & OPF_JMP)
850c9265 2009 return -1;
2010
2011 if (ops[j].op == OP_POP && ops[j].operand[0].type == OPT_REG
2012 && IS(ops[j].operand[0].name, reg))
2013 {
2014 found = 1;
d4e3b5db 2015 ops[j].flags |= flag_set;
850c9265 2016 break;
2017 }
2018
2019 if (g_labels[j][0] != 0)
2020 return -1;
2021 }
2022 }
2023
2024 return found ? 0 : -1;
2025}
2026
1cd4a663 2027// is operand 'opr' modified by parsed_op 'po'?
5101a5f9 2028static int is_opr_modified(const struct parsed_opr *opr,
69a3cdfc 2029 const struct parsed_op *po)
2030{
89ff3147 2031 int mask;
2032
69a3cdfc 2033 if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA))
2034 return 0;
2035
89ff3147 2036 if (opr->type == OPT_REG) {
2037 if (po->op == OP_CALL) {
2038 mask = (1 << xAX) | (1 << xCX) | (1 << xDX);
2039 if ((1 << opr->reg) & mask)
2040 return 1;
2041 else
2042 return 0;
2043 }
2044
2045 if (po->operand[0].type == OPT_REG) {
2046 if (po->regmask_dst & (1 << opr->reg))
2047 return 1;
2048 else
2049 return 0;
2050 }
69a3cdfc 2051 }
2052
2053 return IS(po->operand[0].name, opr->name);
2054}
2055
5101a5f9 2056// is any operand of parsed_op 'po_test' modified by parsed_op 'po'?
2057static int is_any_opr_modified(const struct parsed_op *po_test,
89ff3147 2058 const struct parsed_op *po, int c_mode)
5101a5f9 2059{
89ff3147 2060 int mask;
5101a5f9 2061 int i;
2062
2063 if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA))
2064 return 0;
2065
de50b98b 2066 if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST)
2067 return 0;
2068
2069 if ((po_test->regmask_src | po_test->regmask_dst) & po->regmask_dst)
2070 return 1;
2071
2072 // in reality, it can wreck any register, but in decompiled C
2b43685d 2073 // version it can only overwrite eax or edx:eax
89ff3147 2074 mask = (1 << xAX) | (1 << xDX);
2075 if (!c_mode)
2076 mask |= 1 << xCX;
2077
de50b98b 2078 if (po->op == OP_CALL
89ff3147 2079 && ((po_test->regmask_src | po_test->regmask_dst) & mask))
5101a5f9 2080 return 1;
2081
2082 for (i = 0; i < po_test->operand_cnt; i++)
2083 if (IS(po_test->operand[i].name, po->operand[0].name))
2084 return 1;
2085
2086 return 0;
2087}
2088
940e8e66 2089// scan for any po_test operand modification in range given
89ff3147 2090static int scan_for_mod(struct parsed_op *po_test, int i, int opcnt,
2091 int c_mode)
69a3cdfc 2092{
2b43685d 2093 if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST)
2094 return -1;
2095
69a3cdfc 2096 for (; i < opcnt; i++) {
89ff3147 2097 if (is_any_opr_modified(po_test, &ops[i], c_mode))
69a3cdfc 2098 return i;
2099 }
2100
2101 return -1;
2102}
2103
940e8e66 2104// scan for po_test operand[0] modification in range given
2105static int scan_for_mod_opr0(struct parsed_op *po_test,
2106 int i, int opcnt)
2107{
2108 for (; i < opcnt; i++) {
2109 if (is_opr_modified(&po_test->operand[0], &ops[i]))
2110 return i;
2111 }
2112
2113 return -1;
2114}
2115
04f8a628 2116static int scan_for_flag_set(int i, int magic, int *branched,
2117 int *setters, int *setter_cnt)
69a3cdfc 2118{
04f8a628 2119 struct label_ref *lr;
2b43685d 2120 int ret;
de50b98b 2121
2122 while (i >= 0) {
04f8a628 2123 if (ops[i].cc_scratch == magic) {
2124 ferr(&ops[i], "%s looped\n", __func__);
2125 return -1;
2126 }
2127 ops[i].cc_scratch = magic;
2128
de50b98b 2129 if (g_labels[i][0] != 0) {
2b43685d 2130 *branched = 1;
04f8a628 2131
2132 lr = &g_label_refs[i];
2133 for (; lr->next; lr = lr->next) {
2134 ret = scan_for_flag_set(lr->i, magic,
2135 branched, setters, setter_cnt);
2136 if (ret < 0)
2137 return ret;
2138 }
2139
de50b98b 2140 if (i > 0 && LAST_OP(i - 1)) {
94d447fb 2141 i = lr->i;
de50b98b 2142 continue;
2143 }
04f8a628 2144 ret = scan_for_flag_set(lr->i, magic,
2145 branched, setters, setter_cnt);
2b43685d 2146 if (ret < 0)
2147 return ret;
de50b98b 2148 }
2149 i--;
2150
2b43685d 2151 if (ops[i].flags & OPF_FLAGS) {
2152 setters[*setter_cnt] = i;
2153 (*setter_cnt)++;
2154 return 0;
2155 }
69a3cdfc 2156
2157 if ((ops[i].flags & OPF_JMP) && !(ops[i].flags & OPF_CC))
2158 return -1;
69a3cdfc 2159 }
2160
2161 return -1;
2162}
2163
5101a5f9 2164// scan back for cdq, if anything modifies edx, fail
2165static int scan_for_cdq_edx(int i)
2166{
cdfaeed7 2167 while (i >= 0) {
2168 if (g_labels[i][0] != 0) {
2169 if (g_label_refs[i].next != NULL)
2170 return -1;
2171 if (i > 0 && LAST_OP(i - 1)) {
2172 i = g_label_refs[i].i;
2173 continue;
2174 }
2175 return -1;
2176 }
2177 i--;
2178
5101a5f9 2179 if (ops[i].op == OP_CDQ)
2180 return i;
2181
2182 if (ops[i].regmask_dst & (1 << xDX))
2183 return -1;
5101a5f9 2184 }
2185
2186 return -1;
2187}
2188
64c59faf 2189static int scan_for_reg_clear(int i, int reg)
2190{
cdfaeed7 2191 while (i >= 0) {
2192 if (g_labels[i][0] != 0) {
2193 if (g_label_refs[i].next != NULL)
2194 return -1;
2195 if (i > 0 && LAST_OP(i - 1)) {
2196 i = g_label_refs[i].i;
2197 continue;
2198 }
2199 return -1;
2200 }
2201 i--;
2202
64c59faf 2203 if (ops[i].op == OP_XOR
2204 && ops[i].operand[0].lmod == OPLM_DWORD
2205 && ops[i].operand[0].reg == ops[i].operand[1].reg
2206 && ops[i].operand[0].reg == reg)
2207 return i;
2208
2209 if (ops[i].regmask_dst & (1 << reg))
2210 return -1;
64c59faf 2211 }
2212
2213 return -1;
2214}
2215
1bafb621 2216// scan for positive, constant esp adjust
2217static int scan_for_esp_adjust(int i, int opcnt, int *adj)
2218{
89ff3147 2219 const struct parsed_proto *pp;
7ba45c34 2220 struct parsed_op *po;
46411e6c 2221 int first_pop = -1;
7ba45c34 2222 *adj = 0;
2223
1bafb621 2224 for (; i < opcnt; i++) {
7ba45c34 2225 po = &ops[i];
2226
a2c1d768 2227 if (g_labels[i][0] != 0)
2228 break;
2229
7ba45c34 2230 if (po->op == OP_ADD && po->operand[0].reg == xSP) {
2231 if (po->operand[1].type != OPT_CONST)
1bafb621 2232 ferr(&ops[i], "non-const esp adjust?\n");
7ba45c34 2233 *adj += po->operand[1].val;
1bafb621 2234 if (*adj & 3)
2235 ferr(&ops[i], "unaligned esp adjust: %x\n", *adj);
2236 return i;
2237 }
46411e6c 2238 else if (po->op == OP_PUSH) {
2239 if (first_pop == -1)
2240 first_pop = -2; // none
7ba45c34 2241 *adj -= lmod_bytes(po, po->operand[0].lmod);
46411e6c 2242 }
2243 else if (po->op == OP_POP) {
2244 if (first_pop == -1)
2245 first_pop = i;
7ba45c34 2246 *adj += lmod_bytes(po, po->operand[0].lmod);
46411e6c 2247 }
e56ab892 2248 else if (po->flags & (OPF_JMP|OPF_TAIL)) {
2249 if (po->op != OP_CALL)
a2c1d768 2250 break;
e56ab892 2251 if (po->operand[0].type != OPT_LABEL)
a2c1d768 2252 break;
89ff3147 2253 pp = po->datap;
2254 if (pp != NULL && pp->is_stdcall)
2255 break;
e56ab892 2256 }
a2c1d768 2257 }
7ba45c34 2258
46411e6c 2259 if (*adj == 4 && first_pop >= 0 && ops[first_pop].op == OP_POP
2260 && ops[first_pop].operand[0].type == OPT_REG
2261 && ops[first_pop].operand[0].reg == xCX)
a2c1d768 2262 {
2263 // probably 'pop ecx' was used..
46411e6c 2264 return first_pop;
1bafb621 2265 }
2266
2267 return -1;
2268}
2269
a3684be1 2270static void scan_fwd_set_flags(int i, int opcnt, int magic, int flags)
2271{
2272 struct parsed_op *po;
2273 int j;
2274
2275 if (i < 0)
2276 ferr(ops, "%s: followed bad branch?\n", __func__);
2277
2278 for (; i < opcnt; i++) {
2279 po = &ops[i];
2280 if (po->cc_scratch == magic)
2281 return;
2282 po->cc_scratch = magic;
2283 po->flags |= flags;
2284
2285 if ((po->flags & OPF_JMP) && po->op != OP_CALL) {
2286 if (po->btj != NULL) {
2287 // jumptable
2288 for (j = 0; j < po->btj->count; j++)
2289 scan_fwd_set_flags(po->btj->d[j].bt_i, opcnt, magic, flags);
2290 return;
2291 }
2292
2293 scan_fwd_set_flags(po->bt_i, opcnt, magic, flags);
2294 if (!(po->flags & OPF_CC))
2295 return;
2296 }
2297 if (po->flags & OPF_TAIL)
2298 return;
2299 }
2300}
2301
1cd4a663 2302static const struct parsed_proto *try_recover_pp(
da87ae38 2303 struct parsed_op *po, const struct parsed_opr *opr, int *search_instead)
1cd4a663 2304{
2305 const struct parsed_proto *pp = NULL;
89ff3147 2306 char buf[256];
2307 char *p;
1cd4a663 2308
2309 // maybe an arg of g_func?
2310 if (opr->type == OPT_REGMEM && is_stack_access(po, opr))
2311 {
2312 char ofs_reg[16] = { 0, };
2313 int arg, arg_s, arg_i;
2314 int stack_ra = 0;
2315 int offset = 0;
2316
2317 parse_stack_access(po, opr->name, ofs_reg,
2318 &offset, &stack_ra, NULL);
2319 if (ofs_reg[0] != 0)
2320 ferr(po, "offset reg on arg access?\n");
da87ae38 2321 if (offset <= stack_ra) {
2322 // search who set the stack var instead
2323 if (search_instead != NULL)
2324 *search_instead = 1;
2325 return NULL;
2326 }
1cd4a663 2327
2328 arg_i = (offset - stack_ra - 4) / 4;
2329 for (arg = arg_s = 0; arg < g_func_pp->argc; arg++) {
2330 if (g_func_pp->arg[arg].reg != NULL)
2331 continue;
2332 if (arg_s == arg_i)
2333 break;
2334 arg_s++;
2335 }
2336 if (arg == g_func_pp->argc)
2337 ferr(po, "stack arg %d not in prototype?\n", arg_i);
2338
2339 pp = g_func_pp->arg[arg].fptr;
2340 if (pp == NULL)
46411e6c 2341 ferr(po, "icall sa: arg%d is not a fptr?\n", arg + 1);
89ff3147 2342 check_func_pp(po, pp, "icall arg");
2343 }
2344 else if (opr->type == OPT_REGMEM && strchr(opr->name + 1, '[')) {
2345 // label[index]
2346 p = strchr(opr->name + 1, '[');
2347 memcpy(buf, opr->name, p - opr->name);
2348 buf[p - opr->name] = 0;
2349 pp = proto_parse(g_fhdr, buf, 0);
1cd4a663 2350 }
2351 else if (opr->type == OPT_OFFSET || opr->type == OPT_LABEL) {
36595fd2 2352 pp = proto_parse(g_fhdr, opr->name, 0);
1cd4a663 2353 if (pp == NULL)
2354 ferr(po, "proto_parse failed for icall from '%s'\n", opr->name);
89ff3147 2355 check_func_pp(po, pp, "reg-fptr ref");
1cd4a663 2356 }
2357
2358 return pp;
2359}
2360
da87ae38 2361static void scan_for_call_type(int i, const struct parsed_opr *opr,
89ff3147 2362 int magic, const struct parsed_proto **pp_found, int *multi)
1cd4a663 2363{
2364 const struct parsed_proto *pp = NULL;
2365 struct parsed_op *po;
2366 struct label_ref *lr;
2367
2368 while (i >= 0) {
2369 if (ops[i].cc_scratch == magic)
2370 return;
2371 ops[i].cc_scratch = magic;
2372
2373 if (g_labels[i][0] != 0) {
2374 lr = &g_label_refs[i];
2375 for (; lr != NULL; lr = lr->next)
89ff3147 2376 scan_for_call_type(lr->i, opr, magic, pp_found, multi);
46411e6c 2377 if (i > 0 && LAST_OP(i - 1))
2378 return;
1cd4a663 2379 }
2380 i--;
2381
2382 if (!(ops[i].flags & OPF_DATA))
2383 continue;
2384 if (!is_opr_modified(opr, &ops[i]))
2385 continue;
2386 if (ops[i].op != OP_MOV && ops[i].op != OP_LEA) {
2387 // most probably trashed by some processing
2388 *pp_found = NULL;
2389 return;
2390 }
2391
2392 opr = &ops[i].operand[1];
2393 if (opr->type != OPT_REG)
2394 break;
2395 }
2396
2397 po = (i >= 0) ? &ops[i] : ops;
2398
2399 if (i < 0) {
2400 // reached the top - can only be an arg-reg
2401 if (opr->type != OPT_REG)
2402 return;
2403
2404 for (i = 0; i < g_func_pp->argc; i++) {
2405 if (g_func_pp->arg[i].reg == NULL)
2406 continue;
2407 if (IS(opr->name, g_func_pp->arg[i].reg))
2408 break;
2409 }
2410 if (i == g_func_pp->argc)
2411 return;
2412 pp = g_func_pp->arg[i].fptr;
2413 if (pp == NULL)
46411e6c 2414 ferr(po, "icall: arg%d (%s) is not a fptr?\n",
2415 i + 1, g_func_pp->arg[i].reg);
89ff3147 2416 check_func_pp(po, pp, "icall reg-arg");
1cd4a663 2417 }
2418 else
da87ae38 2419 pp = try_recover_pp(po, opr, NULL);
1cd4a663 2420
89ff3147 2421 if (*pp_found != NULL && pp != NULL && *pp_found != pp) {
1cd4a663 2422 if (!IS((*pp_found)->ret_type.name, pp->ret_type.name)
2423 || (*pp_found)->is_stdcall != pp->is_stdcall
89ff3147 2424 || (*pp_found)->is_fptr != pp->is_fptr
1cd4a663 2425 || (*pp_found)->argc != pp->argc
2426 || (*pp_found)->argc_reg != pp->argc_reg
2427 || (*pp_found)->argc_stack != pp->argc_stack)
2428 {
2429 ferr(po, "icall: parsed_proto mismatch\n");
2430 }
89ff3147 2431 *multi = 1;
1cd4a663 2432 }
2433 if (pp != NULL)
2434 *pp_found = pp;
2435}
2436
89ff3147 2437static const struct parsed_proto *resolve_icall(int i, int opcnt,
2438 int *multi_src)
1cd4a663 2439{
2440 const struct parsed_proto *pp = NULL;
da87ae38 2441 int search_advice = 0;
1cd4a663 2442
89ff3147 2443 *multi_src = 0;
2444
1cd4a663 2445 switch (ops[i].operand[0].type) {
2446 case OPT_REGMEM:
2447 case OPT_LABEL:
2448 case OPT_OFFSET:
da87ae38 2449 pp = try_recover_pp(&ops[i], &ops[i].operand[0], &search_advice);
2450 if (!search_advice)
2451 break;
2452 // fallthrough
1cd4a663 2453 default:
89ff3147 2454 scan_for_call_type(i, &ops[i].operand[0], i + opcnt * 9, &pp,
2455 multi_src);
1cd4a663 2456 break;
2457 }
2458
2459 return pp;
2460}
2461
89ff3147 2462static int collect_call_args_r(struct parsed_op *po, int i,
75ad0378 2463 struct parsed_proto *pp, int *regmask, int *save_arg_vars, int arg,
a3684be1 2464 int magic, int need_op_saving, int may_reuse)
e56ab892 2465{
2466 struct parsed_proto *pp_tmp;
2467 struct label_ref *lr;
2b43685d 2468 int need_to_save_current;
e56ab892 2469 int ret = 0;
2470 int j;
2471
a3684be1 2472 if (i < 0) {
a2c1d768 2473 ferr(po, "dead label encountered\n");
a3684be1 2474 return -1;
2475 }
e56ab892 2476
de50b98b 2477 for (; arg < pp->argc; arg++)
e56ab892 2478 if (pp->arg[arg].reg == NULL)
2479 break;
a3684be1 2480 magic = (magic & 0xffffff) | (arg << 24);
e56ab892 2481
89ff3147 2482 for (j = i; j >= 0 && (arg < pp->argc || pp->is_unresolved); )
e56ab892 2483 {
a3684be1 2484 if (((ops[j].cc_scratch ^ magic) & 0xffffff) == 0) {
2485 if (ops[j].cc_scratch != magic) {
2486 ferr(&ops[j], "arg collect hit same path with diff args for %s\n",
2487 pp->name);
2488 return -1;
2489 }
2490 // ok: have already been here
2491 return 0;
2492 }
2493 ops[j].cc_scratch = magic;
2494
a2c1d768 2495 if (g_labels[j][0] != 0 && g_label_refs[j].i != -1) {
e56ab892 2496 lr = &g_label_refs[j];
2497 if (lr->next != NULL)
2498 need_op_saving = 1;
a652aa9f 2499 for (; lr->next; lr = lr->next) {
2500 if ((ops[lr->i].flags & (OPF_JMP|OPF_CC)) != OPF_JMP)
2501 may_reuse = 1;
89ff3147 2502 ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars,
a3684be1 2503 arg, magic, need_op_saving, may_reuse);
2504 if (ret < 0)
2505 return ret;
a652aa9f 2506 }
e56ab892 2507
a652aa9f 2508 if ((ops[lr->i].flags & (OPF_JMP|OPF_CC)) != OPF_JMP)
2509 may_reuse = 1;
de50b98b 2510 if (j > 0 && LAST_OP(j - 1)) {
e56ab892 2511 // follow last branch in reverse
2512 j = lr->i;
2513 continue;
2514 }
2515 need_op_saving = 1;
89ff3147 2516 ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars,
a3684be1 2517 arg, magic, need_op_saving, may_reuse);
2518 if (ret < 0)
2519 return ret;
e56ab892 2520 }
2521 j--;
2522
2523 if (ops[j].op == OP_CALL)
2524 {
89ff3147 2525 if (pp->is_unresolved)
2526 break;
2527
e56ab892 2528 pp_tmp = ops[j].datap;
2529 if (pp_tmp == NULL)
7ae48d73 2530 ferr(po, "arg collect hit unparsed call '%s'\n",
2531 ops[j].operand[0].name);
a652aa9f 2532 if (may_reuse && pp_tmp->argc_stack > 0)
de50b98b 2533 ferr(po, "arg collect %d/%d hit '%s' with %d stack args\n",
2534 arg, pp->argc, opr_name(&ops[j], 0), pp_tmp->argc_stack);
e56ab892 2535 }
de50b98b 2536 else if (ops[j].op == OP_ADD && ops[j].operand[0].reg == xSP) {
89ff3147 2537 if (pp->is_unresolved)
2538 break;
2539
de50b98b 2540 ferr(po, "arg collect %d/%d hit esp adjust\n",
2541 arg, pp->argc);
2542 }
2543 else if (ops[j].op == OP_POP) {
89ff3147 2544 if (pp->is_unresolved)
2545 break;
2546
de50b98b 2547 ferr(po, "arg collect %d/%d hit pop\n", arg, pp->argc);
2548 }
de50b98b 2549 else if ((ops[j].flags & (OPF_JMP|OPF_CC)) == (OPF_JMP|OPF_CC))
2550 {
89ff3147 2551 if (pp->is_unresolved)
2552 break;
2553
a652aa9f 2554 may_reuse = 1;
de50b98b 2555 }
2556 else if (ops[j].op == OP_PUSH && !(ops[j].flags & OPF_FARG))
e56ab892 2557 {
89ff3147 2558 if (pp->is_unresolved && (ops[j].flags & OPF_RMD))
2559 break;
2560
e56ab892 2561 pp->arg[arg].datap = &ops[j];
2b43685d 2562 need_to_save_current = 0;
e56ab892 2563 if (!need_op_saving) {
89ff3147 2564 ret = scan_for_mod(&ops[j], j + 1, i, 1);
2b43685d 2565 need_to_save_current = (ret >= 0);
e56ab892 2566 }
2b43685d 2567 if (need_op_saving || need_to_save_current) {
e56ab892 2568 // mark this push as one that needs operand saving
2569 ops[j].flags &= ~OPF_RMD;
de50b98b 2570 if (ops[j].argnum == 0) {
2571 ops[j].argnum = arg + 1;
2572 *save_arg_vars |= 1 << arg;
2573 }
2574 else if (ops[j].argnum < arg + 1)
2575 ferr(&ops[j], "argnum conflict (%d<%d) for '%s'\n",
2576 ops[j].argnum, arg + 1, pp->name);
e56ab892 2577 }
de50b98b 2578 else if (ops[j].argnum == 0)
e56ab892 2579 ops[j].flags |= OPF_RMD;
2580
a652aa9f 2581 // some PUSHes are reused by different calls on other branches,
de50b98b 2582 // but that can't happen if we didn't branch, so they
2583 // can be removed from future searches (handles nested calls)
a652aa9f 2584 if (!may_reuse)
de50b98b 2585 ops[j].flags |= OPF_FARG;
2586
da87ae38 2587 ops[j].flags &= ~OPF_RSAVE;
2588
89ff3147 2589 arg++;
2590 if (!pp->is_unresolved) {
2591 // next arg
2592 for (; arg < pp->argc; arg++)
2593 if (pp->arg[arg].reg == NULL)
2594 break;
2595 }
a3684be1 2596 magic = (magic & 0xffffff) | (arg << 24);
75ad0378 2597
2598 // tracking reg usage
2599 if (ops[j].operand[0].type == OPT_REG)
2600 *regmask |= 1 << ops[j].operand[0].reg;
e56ab892 2601 }
2602 }
2603
2604 if (arg < pp->argc) {
2605 ferr(po, "arg collect failed for '%s': %d/%d\n",
2606 pp->name, arg, pp->argc);
89ff3147 2607 return -1;
e56ab892 2608 }
89ff3147 2609
2610 return arg;
2611}
2612
2613static int collect_call_args(struct parsed_op *po, int i,
2614 struct parsed_proto *pp, int *regmask, int *save_arg_vars,
2615 int magic)
2616{
2617 int ret;
2618 int a;
2619
2620 ret = collect_call_args_r(po, i, pp, regmask, save_arg_vars,
2621 0, magic, 0, 0);
2622 if (ret < 0)
2623 return ret;
2624
2625 if (pp->is_unresolved) {
2626 pp->argc += ret;
2627 pp->argc_stack += ret;
2628 for (a = 0; a < pp->argc; a++)
2629 if (pp->arg[a].type.name == NULL)
2630 pp->arg[a].type.name = strdup("int");
2631 }
2632
e56ab892 2633 return ret;
2634}
2635
89ff3147 2636static void pp_insert_reg_arg(struct parsed_proto *pp, const char *reg)
2637{
2638 int i;
2639
2640 for (i = 0; i < pp->argc; i++)
2641 if (pp->arg[i].reg == NULL)
2642 break;
2643
2644 if (pp->argc_stack)
2645 memmove(&pp->arg[i + 1], &pp->arg[i],
2646 sizeof(pp->arg[0]) * pp->argc_stack);
2647 memset(&pp->arg[i], 0, sizeof(pp->arg[i]));
2648 pp->arg[i].reg = strdup(reg);
2649 pp->arg[i].type.name = strdup("int");
2650 pp->argc++;
2651 pp->argc_reg++;
2652}
2653
4c45fa73 2654static void add_label_ref(struct label_ref *lr, int op_i)
2655{
2656 struct label_ref *lr_new;
2657
2658 if (lr->i == -1) {
2659 lr->i = op_i;
2660 return;
2661 }
2662
2663 lr_new = calloc(1, sizeof(*lr_new));
2664 lr_new->i = op_i;
a652aa9f 2665 lr_new->next = lr->next;
4c45fa73 2666 lr->next = lr_new;
2667}
2668
04f8a628 2669static void output_std_flags(FILE *fout, struct parsed_op *po,
2670 int *pfomask, const char *dst_opr_text)
2671{
2672 if (*pfomask & (1 << PFO_Z)) {
2673 fprintf(fout, "\n cond_z = (%s%s == 0);",
2674 lmod_cast_u(po, po->operand[0].lmod), dst_opr_text);
2675 *pfomask &= ~(1 << PFO_Z);
2676 }
2677 if (*pfomask & (1 << PFO_S)) {
2678 fprintf(fout, "\n cond_s = (%s%s < 0);",
2679 lmod_cast_s(po, po->operand[0].lmod), dst_opr_text);
2680 *pfomask &= ~(1 << PFO_S);
2681 }
2682}
2683
91977a1c 2684static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt)
2685{
69a3cdfc 2686 struct parsed_op *po, *delayed_flag_op = NULL, *tmp_op;
850c9265 2687 struct parsed_opr *last_arith_dst = NULL;
3ebea2cf 2688 char buf1[256], buf2[256], buf3[256], cast[64];
bd96f656 2689 const struct parsed_proto *pp_c;
89ff3147 2690 struct parsed_proto *pp;
4c45fa73 2691 struct parsed_data *pd;
91977a1c 2692 const char *tmpname;
940e8e66 2693 enum parsed_flag_op pfo;
69a3cdfc 2694 int save_arg_vars = 0;
2695 int cmp_result_vars = 0;
87bf6cec 2696 int need_mul_var = 0;
91977a1c 2697 int had_decl = 0;
3ebea2cf 2698 int label_pending = 0;
d4e3b5db 2699 int regmask_save = 0;
91977a1c 2700 int regmask_arg = 0;
a3684be1 2701 int regmask_now = 0;
91977a1c 2702 int regmask = 0;
940e8e66 2703 int pfomask = 0;
64c59faf 2704 int found = 0;
d4e3b5db 2705 int depth = 0;
91977a1c 2706 int no_output;
4c45fa73 2707 int i, j, l;
69a3cdfc 2708 int dummy;
91977a1c 2709 int arg;
91977a1c 2710 int reg;
2711 int ret;
2712
1bafb621 2713 g_bp_frame = g_sp_frame = g_stack_fsz = 0;
a2c1d768 2714 g_stack_frame_used = 0;
91977a1c 2715
36595fd2 2716 g_func_pp = proto_parse(fhdr, funcn, 0);
bd96f656 2717 if (g_func_pp == NULL)
91977a1c 2718 ferr(ops, "proto_parse failed for '%s'\n", funcn);
2719
bd96f656 2720 fprintf(fout, "%s ", g_func_pp->ret_type.name);
54e763a1 2721 if (g_func_pp->is_stdcall && g_func_pp->argc_reg == 0)
2722 fprintf(fout, "__stdcall ");
e56ab892 2723 if (g_ida_func_attr & IDAFA_NORETURN)
2724 fprintf(fout, "noreturn ");
2725 fprintf(fout, "%s(", funcn);
54e763a1 2726
bd96f656 2727 for (i = 0; i < g_func_pp->argc; i++) {
91977a1c 2728 if (i > 0)
2729 fprintf(fout, ", ");
54e763a1 2730 if (g_func_pp->arg[i].fptr != NULL) {
2731 // func pointer..
2732 pp = g_func_pp->arg[i].fptr;
2733 fprintf(fout, "%s (", pp->ret_type.name);
2734 if (pp->is_stdcall && pp->argc_reg == 0)
2735 fprintf(fout, "__stdcall ");
2736 fprintf(fout, "*a%d)(", i + 1);
2737 for (j = 0; j < pp->argc; j++) {
2738 if (j > 0)
2739 fprintf(fout, ", ");
2740 if (pp->arg[j].fptr)
2741 ferr(ops, "nested fptr\n");
2742 fprintf(fout, "%s", pp->arg[j].type.name);
2743 }
2744 fprintf(fout, ")");
2745 }
2746 else {
2747 fprintf(fout, "%s a%d", g_func_pp->arg[i].type.name, i + 1);
2748 }
89ff3147 2749 if (g_func_pp->arg[i].reg != NULL) {
2750 reg = char_array_i(regs_r32,
2751 ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg);
2752 if (reg < 0)
2753 ferr(ops, "arg '%s' is not a reg?\n", g_func_pp->arg[i].reg);
2754 regmask_arg |= 1 << reg;
2755 }
91977a1c 2756 }
bd96f656 2757 if (g_func_pp->is_vararg) {
4f12f671 2758 if (i > 0)
2759 fprintf(fout, ", ");
2760 fprintf(fout, "...");
2761 }
54e763a1 2762
91977a1c 2763 fprintf(fout, ")\n{\n");
2764
2765 // pass1:
1bafb621 2766 // - handle ebp/esp frame, remove ops related to it
91977a1c 2767 if (ops[0].op == OP_PUSH && IS(opr_name(&ops[0], 0), "ebp")
2768 && ops[1].op == OP_MOV
2769 && IS(opr_name(&ops[1], 0), "ebp")
2770 && IS(opr_name(&ops[1], 1), "esp"))
2771 {
87bf6cec 2772 int ecx_push = 0;
2773
91977a1c 2774 g_bp_frame = 1;
69a3cdfc 2775 ops[0].flags |= OPF_RMD;
2776 ops[1].flags |= OPF_RMD;
4c45fa73 2777 i = 2;
91977a1c 2778
2779 if (ops[2].op == OP_SUB && IS(opr_name(&ops[2], 0), "esp")) {
1bafb621 2780 g_stack_fsz = opr_const(&ops[2], 1);
69a3cdfc 2781 ops[2].flags |= OPF_RMD;
4c45fa73 2782 i++;
91977a1c 2783 }
87bf6cec 2784 else {
2785 // another way msvc builds stack frame..
2786 i = 2;
2787 while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) {
1bafb621 2788 g_stack_fsz += 4;
87bf6cec 2789 ops[i].flags |= OPF_RMD;
2790 ecx_push++;
2791 i++;
2792 }
4c45fa73 2793 // and another way..
2794 if (i == 2 && ops[i].op == OP_MOV && ops[i].operand[0].reg == xAX
2795 && ops[i].operand[1].type == OPT_CONST
2796 && ops[i + 1].op == OP_CALL
2797 && IS(opr_name(&ops[i + 1], 0), "__alloca_probe"))
2798 {
2799 g_stack_fsz += ops[i].operand[1].val;
2800 ops[i].flags |= OPF_RMD;
2801 i++;
2802 ops[i].flags |= OPF_RMD;
2803 i++;
2804 }
87bf6cec 2805 }
91977a1c 2806
64c59faf 2807 found = 0;
91977a1c 2808 do {
2809 for (; i < opcnt; i++)
2810 if (ops[i].op == OP_RET)
2811 break;
64c59faf 2812 if (i == opcnt && (ops[i - 1].flags & OPF_JMP) && found)
2813 break;
2814
e56ab892 2815 if (ops[i - 1].op == OP_POP && IS(opr_name(&ops[i - 1], 0), "ebp"))
2816 ops[i - 1].flags |= OPF_RMD;
2817 else if (!(g_ida_func_attr & IDAFA_NORETURN))
91977a1c 2818 ferr(&ops[i - 1], "'pop ebp' expected\n");
91977a1c 2819
1bafb621 2820 if (g_stack_fsz != 0) {
e56ab892 2821 if (ops[i - 2].op == OP_MOV
2822 && IS(opr_name(&ops[i - 2], 0), "esp")
2823 && IS(opr_name(&ops[i - 2], 1), "ebp"))
91977a1c 2824 {
e56ab892 2825 ops[i - 2].flags |= OPF_RMD;
91977a1c 2826 }
e56ab892 2827 else if (!(g_ida_func_attr & IDAFA_NORETURN))
2828 ferr(&ops[i - 2], "esp restore expected\n");
87bf6cec 2829
2830 if (ecx_push && ops[i - 3].op == OP_POP
2831 && IS(opr_name(&ops[i - 3], 0), "ecx"))
2832 {
2833 ferr(&ops[i - 3], "unexpected ecx pop\n");
2834 }
91977a1c 2835 }
87bf6cec 2836
64c59faf 2837 found = 1;
91977a1c 2838 i++;
2839 } while (i < opcnt);
2840 }
1bafb621 2841 else {
2842 for (i = 0; i < opcnt; i++) {
2843 if (ops[i].op == OP_PUSH || (ops[i].flags & (OPF_JMP|OPF_TAIL)))
2844 break;
2845 if (ops[i].op == OP_SUB && ops[i].operand[0].reg == xSP
2846 && ops[i].operand[1].type == OPT_CONST)
2847 {
2848 g_sp_frame = 1;
2849 break;
2850 }
2851 }
2852
2853 if (g_sp_frame)
2854 {
2855 g_stack_fsz = ops[i].operand[1].val;
2856 ops[i].flags |= OPF_RMD;
2857
2858 i++;
2859 do {
2860 for (; i < opcnt; i++)
2861 if (ops[i].op == OP_RET)
2862 break;
2863 if (ops[i - 1].op != OP_ADD
2864 || !IS(opr_name(&ops[i - 1], 0), "esp")
2865 || ops[i - 1].operand[1].type != OPT_CONST
2866 || ops[i - 1].operand[1].val != g_stack_fsz)
2867 ferr(&ops[i - 1], "'add esp' expected\n");
2868 ops[i - 1].flags |= OPF_RMD;
2869
2870 i++;
2871 } while (i < opcnt);
2872 }
2873 }
91977a1c 2874
2875 // pass2:
7ae48d73 2876 // - parse calls with labels
87bf6cec 2877 // - resolve all branches
de50b98b 2878 for (i = 0; i < opcnt; i++)
2879 {
87bf6cec 2880 po = &ops[i];
2881 po->bt_i = -1;
4c45fa73 2882 po->btj = NULL;
87bf6cec 2883
7ae48d73 2884 if (po->flags & OPF_RMD)
2885 continue;
2886
2887 if (po->op == OP_CALL) {
2888 if (po->operand[0].type == OPT_LABEL) {
2889 tmpname = opr_name(po, 0);
46411e6c 2890 if (IS_START(tmpname, "loc_"))
2891 ferr(po, "call to loc_*\n");
36595fd2 2892 pp_c = proto_parse(fhdr, tmpname, 0);
7ae48d73 2893 if (pp_c == NULL)
2894 ferr(po, "proto_parse failed for call '%s'\n", tmpname);
da87ae38 2895 if (pp_c->is_fptr)
2896 check_func_pp(po, pp_c, "fptr var call");
2897 if (pp_c->is_noreturn)
2898 po->flags |= OPF_TAIL;
2899
7ae48d73 2900 pp = proto_clone(pp_c);
2901 my_assert_not(pp, NULL);
2902 po->datap = pp;
2903 }
2904 continue;
2905 }
2906
2907 if (!(po->flags & OPF_JMP) || po->op == OP_RET)
87bf6cec 2908 continue;
2909
4c45fa73 2910 if (po->operand[0].type == OPT_REGMEM) {
2911 char *p = strchr(po->operand[0].name, '[');
2912 if (p == NULL)
89ff3147 2913 goto tailcall;
4c45fa73 2914 ret = p - po->operand[0].name;
2915 strncpy(buf1, po->operand[0].name, ret);
2916 buf1[ret] = 0;
2917
2918 for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) {
2919 if (IS(g_func_pd[j].label, buf1)) {
2920 pd = &g_func_pd[j];
2921 break;
2922 }
2923 }
2924 if (pd == NULL)
840257f6 2925 //ferr(po, "label '%s' not parsed?\n", buf1);
2926 goto tailcall;
4c45fa73 2927 if (pd->type != OPT_OFFSET)
2928 ferr(po, "label '%s' with non-offset data?\n", buf1);
2929
2930 // find all labels, link
2931 for (j = 0; j < pd->count; j++) {
2932 for (l = 0; l < opcnt; l++) {
2933 if (g_labels[l][0] && IS(g_labels[l], pd->d[j].u.label)) {
2934 add_label_ref(&g_label_refs[l], i);
2935 pd->d[j].bt_i = l;
2936 break;
2937 }
2938 }
2939 }
2940
2941 po->btj = pd;
2942 continue;
2943 }
2944
2945 for (l = 0; l < opcnt; l++) {
2946 if (g_labels[l][0] && IS(po->operand[0].name, g_labels[l])) {
2947 add_label_ref(&g_label_refs[l], i);
2948 po->bt_i = l;
87bf6cec 2949 break;
2950 }
2951 }
2952
4c45fa73 2953 if (po->bt_i != -1)
2954 continue;
2955
840257f6 2956 if (po->operand[0].type == OPT_LABEL)
87bf6cec 2957 // assume tail call
840257f6 2958 goto tailcall;
4c45fa73 2959
2960 ferr(po, "unhandled branch\n");
840257f6 2961
2962tailcall:
2963 po->op = OP_CALL;
2964 po->flags |= OPF_TAIL;
7ae48d73 2965 i--; // reprocess
87bf6cec 2966 }
2967
2968 // pass3:
a2c1d768 2969 // - remove dead labels
91977a1c 2970 // - process calls
1bafb621 2971 for (i = 0; i < opcnt; i++)
2972 {
a2c1d768 2973 if (g_labels[i][0] != 0 && g_label_refs[i].i == -1)
2974 g_labels[i][0] = 0;
2975
69a3cdfc 2976 po = &ops[i];
2977 if (po->flags & OPF_RMD)
91977a1c 2978 continue;
850c9265 2979
d4e3b5db 2980 if (po->op == OP_CALL)
69a3cdfc 2981 {
1bafb621 2982 tmpname = opr_name(po, 0);
7ae48d73 2983 pp = po->datap;
2984 if (pp == NULL)
1bafb621 2985 {
7ae48d73 2986 // indirect call
89ff3147 2987 pp_c = resolve_icall(i, opcnt, &l);
2988 if (pp_c != NULL) {
1cd4a663 2989 pp = proto_clone(pp_c);
89ff3147 2990 my_assert_not(pp, NULL);
2991 if (l)
2992 // not resolved just to single func
2993 pp->is_fptr = 1;
2994 }
1cd4a663 2995 if (pp == NULL) {
2996 pp = calloc(1, sizeof(*pp));
2997 my_assert_not(pp, NULL);
89ff3147 2998 pp->is_fptr = 1;
1cd4a663 2999 ret = scan_for_esp_adjust(i + 1, opcnt, &j);
89ff3147 3000 if (ret < 0) {
3001 if (!g_allow_regfunc)
3002 ferr(po, "non-__cdecl indirect call unhandled yet\n");
3003 pp->is_unresolved = 1;
3004 j = 0;
3005 }
1cd4a663 3006 j /= 4;
3007 if (j > ARRAY_SIZE(pp->arg))
89ff3147 3008 ferr(po, "esp adjust too large: %d\n", j);
1cd4a663 3009 pp->ret_type.name = strdup("int");
3010 pp->argc = pp->argc_stack = j;
3011 for (arg = 0; arg < pp->argc; arg++)
3012 pp->arg[arg].type.name = strdup("int");
3013 }
7ae48d73 3014 po->datap = pp;
1bafb621 3015 }
3016
7ba45c34 3017 // look for and make use of esp adjust
3018 ret = -1;
e56ab892 3019 if (!pp->is_stdcall && pp->argc_stack > 0)
7ba45c34 3020 ret = scan_for_esp_adjust(i + 1, opcnt, &j);
1bafb621 3021 if (ret >= 0) {
7ba45c34 3022 if (pp->is_vararg) {
3023 if (j / 4 < pp->argc_stack)
3024 ferr(po, "esp adjust is too small: %x < %x\n",
3025 j, pp->argc_stack * 4);
3026 // modify pp to make it have varargs as normal args
3027 arg = pp->argc;
3028 pp->argc += j / 4 - pp->argc_stack;
3029 for (; arg < pp->argc; arg++) {
3ebea2cf 3030 pp->arg[arg].type.name = strdup("int");
7ba45c34 3031 pp->argc_stack++;
3032 }
3033 if (pp->argc > ARRAY_SIZE(pp->arg))
e56ab892 3034 ferr(po, "too many args for '%s'\n", tmpname);
7ba45c34 3035 }
1bafb621 3036 if (pp->argc_stack != j / 4)
e56ab892 3037 ferr(po, "stack tracking failed for '%s': %x %x\n",
3038 tmpname, pp->argc_stack * 4, j);
7ba45c34 3039
1bafb621 3040 ops[ret].flags |= OPF_RMD;
7ba45c34 3041 // a bit of a hack, but deals with use of
3042 // single adj for multiple calls
3043 ops[ret].operand[1].val -= j;
1bafb621 3044 }
7ba45c34 3045 else if (pp->is_vararg)
3046 ferr(po, "missing esp_adjust for vararg func '%s'\n",
3047 pp->name);
91977a1c 3048
39b168b8 3049 for (arg = 0; arg < pp->argc; arg++) {
75ad0378 3050 if (pp->arg[arg].reg != NULL) {
3051 reg = char_array_i(regs_r32,
3052 ARRAY_SIZE(regs_r32), pp->arg[arg].reg);
3053 if (reg < 0)
3054 ferr(ops, "arg '%s' is not a reg?\n", pp->arg[arg].reg);
3055 regmask |= 1 << reg;
3056 }
89ff3147 3057#if 0
39b168b8 3058 if (pp->arg[arg].fptr != NULL) {
75ad0378 3059 // can't call functions with non-__cdecl callbacks yet
89ff3147 3060 struct parsed_proto *pp_tmp;
39b168b8 3061 pp_tmp = pp->arg[arg].fptr;
1cd4a663 3062 if (pp_tmp->argc_reg != 0)
3063 ferr(po, "'%s' has a callback with reg-args\n", tmpname);
39b168b8 3064 }
89ff3147 3065#endif
39b168b8 3066 }
3067
89ff3147 3068 if (!pp->is_unresolved) {
3069 // since we know the args, collect them
3070 collect_call_args(po, i, pp, &regmask, &save_arg_vars,
3071 i + opcnt * 2);
3072 }
2b43685d 3073
3074 if (strstr(pp->ret_type.name, "int64"))
3075 need_mul_var = 1;
91977a1c 3076 }
d4e3b5db 3077 }
3078
3079 // pass4:
3080 // - find POPs for PUSHes, rm both
3081 // - scan for all used registers
3082 // - find flag set ops for their users
89ff3147 3083 // - do unreselved calls
1bafb621 3084 // - declare indirect functions
d4e3b5db 3085 for (i = 0; i < opcnt; i++) {
3086 po = &ops[i];
3087 if (po->flags & OPF_RMD)
3088 continue;
3089
7ae48d73 3090 if (po->op == OP_PUSH && (po->flags & OPF_RSAVE)) {
3091 reg = po->operand[0].reg;
3092 if (!(regmask & (1 << reg)))
3093 // not a reg save after all, rerun scan_for_pop
3094 po->flags &= ~OPF_RSAVE;
3095 else
3096 regmask_save |= 1 << reg;
3097 }
3098
d4e3b5db 3099 if (po->op == OP_PUSH
de50b98b 3100 && po->argnum == 0 && !(po->flags & OPF_RSAVE)
d4e3b5db 3101 && po->operand[0].type == OPT_REG)
3102 {
3103 reg = po->operand[0].reg;
3104 if (reg < 0)
3105 ferr(po, "reg not set for push?\n");
3106
3107 depth = 0;
3108 ret = scan_for_pop(i + 1, opcnt,
a3684be1 3109 po->operand[0].name, i + opcnt * 3, 0, &depth, 0);
d4e3b5db 3110 if (ret == 1) {
3111 if (depth > 1)
3112 ferr(po, "too much depth: %d\n", depth);
d4e3b5db 3113
3114 po->flags |= OPF_RMD;
3115 scan_for_pop(i + 1, opcnt, po->operand[0].name,
a3684be1 3116 i + opcnt * 4, 0, &depth, 1);
d4e3b5db 3117 continue;
3118 }
3119 ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, 0);
3120 if (ret == 0) {
3121 arg = OPF_RMD;
3122 if (regmask & (1 << reg)) {
3123 if (regmask_save & (1 << reg))
3124 ferr(po, "%s already saved?\n", po->operand[0].name);
3125 arg = OPF_RSAVE;
3126 }
3127 po->flags |= arg;
3128 scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, arg);
3129 continue;
3130 }
3131 }
3132
a3684be1 3133 regmask_now = po->regmask_src | po->regmask_dst;
3134 if (regmask_now & (1 << xBP)) {
3135 if (g_bp_frame && !(po->flags & OPF_EBP_S)) {
3136 if (po->regmask_dst & (1 << xBP))
3137 // compiler decided to drop bp frame and use ebp as scratch
3138 scan_fwd_set_flags(i, opcnt, i + opcnt * 5, OPF_EBP_S);
3139 else
3140 regmask_now &= ~(1 << xBP);
3141 }
3142 }
3143
3144 regmask |= regmask_now;
d4e3b5db 3145
3146 if (po->flags & OPF_CC)
3147 {
2b43685d 3148 int setters[16], cnt = 0, branched = 0;
3149
04f8a628 3150 ret = scan_for_flag_set(i, i + opcnt * 6,
3151 &branched, setters, &cnt);
2b43685d 3152 if (ret < 0 || cnt <= 0)
3153 ferr(po, "unable to trace flag setter(s)\n");
3154 if (cnt > ARRAY_SIZE(setters))
3155 ferr(po, "too many flag setters\n");
d4e3b5db 3156
d4e3b5db 3157 pfo = split_cond(po, po->op, &dummy);
2b43685d 3158 for (j = 0; j < cnt; j++)
3159 {
3160 tmp_op = &ops[setters[j]]; // flag setter
3161 pfomask = 0;
3162
3163 // to get nicer code, we try to delay test and cmp;
3164 // if we can't because of operand modification, or if we
3165 // have math op, or branch, make it calculate flags explicitly
3166 if (tmp_op->op == OP_TEST || tmp_op->op == OP_CMP) {
89ff3147 3167 if (branched || scan_for_mod(tmp_op, setters[j] + 1, i, 0) >= 0)
2b43685d 3168 pfomask = 1 << pfo;
3169 }
3170 else if (tmp_op->op == OP_CMPS) {
3171 pfomask = 1 << PFO_Z;
3172 }
3173 else {
04f8a628 3174 // see if we'll be able to handle based on op result
3175 if ((tmp_op->op != OP_AND && tmp_op->op != OP_OR
3176 && pfo != PFO_Z && pfo != PFO_S && pfo != PFO_P)
3177 || branched
2b43685d 3178 || scan_for_mod_opr0(tmp_op, setters[j] + 1, i) >= 0)
3179 pfomask = 1 << pfo;
3180 }
3181 if (pfomask) {
3182 tmp_op->pfomask |= pfomask;
3183 cmp_result_vars |= pfomask;
2b43685d 3184 }
04f8a628 3185 // note: may overwrite, currently not a problem
3186 po->datap = tmp_op;
d4e3b5db 3187 }
3188
3189 if (po->op == OP_ADC || po->op == OP_SBB)
3190 cmp_result_vars |= 1 << PFO_C;
3191 }
87bf6cec 3192 else if (po->op == OP_MUL
3193 || (po->op == OP_IMUL && po->operand_cnt == 1))
3194 {
3195 need_mul_var = 1;
3196 }
89ff3147 3197 else if (po->op == OP_CALL) {
1bafb621 3198 pp = po->datap;
89ff3147 3199 if (pp == NULL)
3200 ferr(po, "NULL pp\n");
3201
3202 if (pp->is_unresolved) {
3203 int regmask_push = 0;
3204 collect_call_args(po, i, pp, &regmask_push, &save_arg_vars,
3205 i + opcnt * 2);
3206
3207 if (!((regmask_push & (1 << xCX))
3208 && (regmask_push & (1 << xDX))))
3209 {
3210 if (pp->argc_stack != 0
3211 || ((regmask | regmask_arg) & (1 << xCX)))
3212 {
3213 pp_insert_reg_arg(pp, "ecx");
3214 regmask |= 1 << xCX;
3215 }
3216 if (pp->argc_stack != 0
3217 || ((regmask | regmask_arg) & (1 << xDX)))
3218 {
3219 pp_insert_reg_arg(pp, "edx");
3220 regmask |= 1 << xDX;
3221 }
3222 }
3223 regmask |= regmask_push;
3224 }
3225
3226 if (pp->is_fptr) {
3227 fprintf(fout, " %s (", pp->ret_type.name);
3228 if (pp->is_stdcall && pp->argc_reg == 0)
3229 fprintf(fout, "__stdcall ");
3230 fprintf(fout, "*icall%d)(", i);
3231 for (j = 0; j < pp->argc; j++) {
3232 if (j > 0)
3233 fprintf(fout, ", ");
3234 fprintf(fout, "%s a%d", pp->arg[j].type.name, j + 1);
3235 }
3236 fprintf(fout, ");\n");
1bafb621 3237 }
1bafb621 3238 }
75ad0378 3239 else if (po->op == OP_RET && !IS(g_func_pp->ret_type.name, "void"))
3240 regmask |= 1 << xAX;
91977a1c 3241 }
3242
da87ae38 3243 // pass4:
3244 // - confirm regmask_save, it might have been reduced
3245 if (regmask_save != 0)
3246 {
3247 regmask_save = 0;
3248 for (i = 0; i < opcnt; i++) {
3249 po = &ops[i];
3250 if (po->flags & OPF_RMD)
3251 continue;
3252
3253 if (po->op == OP_PUSH && (po->flags & OPF_RSAVE))
3254 regmask_save |= 1 << po->operand[0].reg;
3255 }
3256 }
3257
3258
4c45fa73 3259 // output LUTs/jumptables
3260 for (i = 0; i < g_func_pd_cnt; i++) {
3261 pd = &g_func_pd[i];
3262 fprintf(fout, " static const ");
3263 if (pd->type == OPT_OFFSET) {
3264 fprintf(fout, "void *jt_%s[] =\n { ", pd->label);
3265
3266 for (j = 0; j < pd->count; j++) {
3267 if (j > 0)
3268 fprintf(fout, ", ");
3269 fprintf(fout, "&&%s", pd->d[j].u.label);
3270 }
3271 }
3272 else {
3273 fprintf(fout, "%s %s[] =\n { ",
3274 lmod_type_u(ops, pd->lmod), pd->label);
3275
3276 for (j = 0; j < pd->count; j++) {
3277 if (j > 0)
3278 fprintf(fout, ", ");
3279 fprintf(fout, "%u", pd->d[j].u.val);
3280 }
3281 }
3282 fprintf(fout, " };\n");
3283 }
3284
4f12f671 3285 // declare stack frame, va_arg
1bafb621 3286 if (g_stack_fsz)
850c9265 3287 fprintf(fout, " union { u32 d[%d]; u16 w[%d]; u8 b[%d]; } sf;\n",
1bafb621 3288 (g_stack_fsz + 3) / 4, (g_stack_fsz + 1) / 2, g_stack_fsz);
850c9265 3289
bd96f656 3290 if (g_func_pp->is_vararg)
4f12f671 3291 fprintf(fout, " va_list ap;\n");
3292
940e8e66 3293 // declare arg-registers
bd96f656 3294 for (i = 0; i < g_func_pp->argc; i++) {
3295 if (g_func_pp->arg[i].reg != NULL) {
91977a1c 3296 reg = char_array_i(regs_r32,
bd96f656 3297 ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg);
75ad0378 3298 if (regmask & (1 << reg)) {
3299 fprintf(fout, " u32 %s = (u32)a%d;\n",
3300 g_func_pp->arg[i].reg, i + 1);
3301 }
3302 else
3303 fprintf(fout, " // %s = a%d; // unused\n",
3304 g_func_pp->arg[i].reg, i + 1);
91977a1c 3305 had_decl = 1;
3306 }
3307 }
3308
75ad0378 3309 regmask_now = regmask & ~regmask_arg;
3310 regmask_now &= ~(1 << xSP);
3311 if (regmask_now) {
91977a1c 3312 for (reg = 0; reg < 8; reg++) {
75ad0378 3313 if (regmask_now & (1 << reg)) {
91977a1c 3314 fprintf(fout, " u32 %s;\n", regs_r32[reg]);
3315 had_decl = 1;
3316 }
3317 }
3318 }
3319
d4e3b5db 3320 if (regmask_save) {
3321 for (reg = 0; reg < 8; reg++) {
3322 if (regmask_save & (1 << reg)) {
3323 fprintf(fout, " u32 s_%s;\n", regs_r32[reg]);
3324 had_decl = 1;
3325 }
3326 }
3327 }
3328
69a3cdfc 3329 if (save_arg_vars) {
3330 for (reg = 0; reg < 32; reg++) {
3331 if (save_arg_vars & (1 << reg)) {
3332 fprintf(fout, " u32 s_a%d;\n", reg + 1);
3333 had_decl = 1;
3334 }
3335 }
3336 }
3337
3338 if (cmp_result_vars) {
3339 for (i = 0; i < 8; i++) {
3340 if (cmp_result_vars & (1 << i)) {
3341 fprintf(fout, " u32 cond_%s;\n", parsed_flag_op_names[i]);
3342 had_decl = 1;
3343 }
3344 }
3345 }
3346
87bf6cec 3347 if (need_mul_var) {
3348 fprintf(fout, " u64 mul_tmp;\n");
3349 had_decl = 1;
3350 }
3351
91977a1c 3352 if (had_decl)
3353 fprintf(fout, "\n");
3354
bd96f656 3355 if (g_func_pp->is_vararg) {
3356 if (g_func_pp->argc_stack == 0)
4f12f671 3357 ferr(ops, "vararg func without stack args?\n");
bd96f656 3358 fprintf(fout, " va_start(ap, a%d);\n", g_func_pp->argc);
4f12f671 3359 }
3360
91977a1c 3361 // output ops
69a3cdfc 3362 for (i = 0; i < opcnt; i++)
3363 {
a2c1d768 3364 if (g_labels[i][0] != 0) {
91977a1c 3365 fprintf(fout, "\n%s:\n", g_labels[i]);
3ebea2cf 3366 label_pending = 1;
2b43685d 3367
3368 delayed_flag_op = NULL;
3369 last_arith_dst = NULL;
3ebea2cf 3370 }
91977a1c 3371
69a3cdfc 3372 po = &ops[i];
3373 if (po->flags & OPF_RMD)
91977a1c 3374 continue;
3375
3376 no_output = 0;
3377
91977a1c 3378 #define assert_operand_cnt(n_) \
850c9265 3379 if (po->operand_cnt != n_) \
3380 ferr(po, "operand_cnt is %d/%d\n", po->operand_cnt, n_)
3381
69a3cdfc 3382 // conditional/flag using op?
3383 if (po->flags & OPF_CC)
850c9265 3384 {
940e8e66 3385 int is_delayed = 0;
3386 int is_inv = 0;
69a3cdfc 3387
940e8e66 3388 pfo = split_cond(po, po->op, &is_inv);
04f8a628 3389 tmp_op = po->datap;
850c9265 3390
69a3cdfc 3391 // we go through all this trouble to avoid using parsed_flag_op,
3392 // which makes generated code much nicer
3393 if (delayed_flag_op != NULL)
850c9265 3394 {
940e8e66 3395 out_cmp_test(buf1, sizeof(buf1), delayed_flag_op, pfo, is_inv);
3396 is_delayed = 1;
91977a1c 3397 }
850c9265 3398 else if (last_arith_dst != NULL
04f8a628 3399 && (pfo == PFO_Z || pfo == PFO_S || pfo == PFO_P
3400 || (tmp_op && (tmp_op->op == OP_AND || tmp_op->op == OP_OR))
3401 ))
850c9265 3402 {
3ebea2cf 3403 out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst);
940e8e66 3404 out_test_for_cc(buf1, sizeof(buf1), po, pfo, is_inv,
850c9265 3405 last_arith_dst->lmod, buf3);
940e8e66 3406 is_delayed = 1;
850c9265 3407 }
04f8a628 3408 else if (tmp_op != NULL) {
7ba45c34 3409 // use preprocessed flag calc results
04f8a628 3410 if (!(tmp_op->pfomask & (1 << pfo)))
69a3cdfc 3411 ferr(po, "not prepared for pfo %d\n", pfo);
3412
940e8e66 3413 // note: is_inv was not yet applied
69a3cdfc 3414 snprintf(buf1, sizeof(buf1), "(%scond_%s)",
940e8e66 3415 is_inv ? "!" : "", parsed_flag_op_names[pfo]);
69a3cdfc 3416 }
3417 else {
3418 ferr(po, "all methods of finding comparison failed\n");
3419 }
850c9265 3420
69a3cdfc 3421 if (po->flags & OPF_JMP) {
850c9265 3422 fprintf(fout, " if %s\n", buf1);
3423 }
5101a5f9 3424 else if (po->op == OP_ADC || po->op == OP_SBB) {
940e8e66 3425 if (is_delayed)
3426 fprintf(fout, " cond_%s = %s;\n",
3427 parsed_flag_op_names[pfo], buf1);
850c9265 3428 }
5101a5f9 3429 else if (po->flags & OPF_DATA) { // SETcc
850c9265 3430 out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]);
3431 fprintf(fout, " %s = %s;", buf2, buf1);
91977a1c 3432 }
69a3cdfc 3433 else {
3434 ferr(po, "unhandled conditional op\n");
3435 }
91977a1c 3436 }
3437
940e8e66 3438 pfomask = po->pfomask;
3439
850c9265 3440 switch (po->op)
91977a1c 3441 {
3442 case OP_MOV:
3443 assert_operand_cnt(2);
850c9265 3444 propagate_lmod(po, &po->operand[0], &po->operand[1]);
de50b98b 3445 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
3446 fprintf(fout, " %s = %s;", buf1,
3ebea2cf 3447 out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
3448 po->operand[0].is_ptr ? "(void *)" : "", 0));
850c9265 3449 break;
3450
3451 case OP_LEA:
3452 assert_operand_cnt(2);
87bf6cec 3453 po->operand[1].lmod = OPLM_DWORD; // always
850c9265 3454 fprintf(fout, " %s = %s;",
3455 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
3ebea2cf 3456 out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
3457 NULL, 1));
850c9265 3458 break;
3459
3460 case OP_MOVZX:
3461 assert_operand_cnt(2);
91977a1c 3462 fprintf(fout, " %s = %s;",
850c9265 3463 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
3ebea2cf 3464 out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
850c9265 3465 break;
3466
3467 case OP_MOVSX:
3468 assert_operand_cnt(2);
3469 switch (po->operand[1].lmod) {
3470 case OPLM_BYTE:
3471 strcpy(buf3, "(s8)");
3472 break;
3473 case OPLM_WORD:
3474 strcpy(buf3, "(s16)");
3475 break;
3476 default:
3477 ferr(po, "invalid src lmod: %d\n", po->operand[1].lmod);
3478 }
a2c1d768 3479 fprintf(fout, " %s = %s;",
850c9265 3480 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
a2c1d768 3481 out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
3482 buf3, 0));
850c9265 3483 break;
3484
3485 case OP_NOT:
3486 assert_operand_cnt(1);
3487 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
3488 fprintf(fout, " %s = ~%s;", buf1, buf1);
3489 break;
3490
5101a5f9 3491 case OP_CDQ:
3492 assert_operand_cnt(2);
3493 fprintf(fout, " %s = (s32)%s >> 31;",
3494 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
3ebea2cf 3495 out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
5101a5f9 3496 strcpy(g_comment, "cdq");
3497 break;
3498
33c35af6 3499 case OP_STOS:
3500 // assumes DF=0
3501 assert_operand_cnt(3);
3502 if (po->flags & OPF_REP) {
3503 fprintf(fout, " for (; ecx != 0; ecx--, edi += %d)\n",
3504 lmod_bytes(po, po->operand[0].lmod));
d4e3b5db 3505 fprintf(fout, " %sedi = eax;",
3506 lmod_cast_u_ptr(po, po->operand[0].lmod));
33c35af6 3507 strcpy(g_comment, "rep stos");
3508 }
3509 else {
d4e3b5db 3510 fprintf(fout, " %sedi = eax; edi += %d;",
3511 lmod_cast_u_ptr(po, po->operand[0].lmod),
33c35af6 3512 lmod_bytes(po, po->operand[0].lmod));
3513 strcpy(g_comment, "stos");
3514 }
3515 break;
3516
d4e3b5db 3517 case OP_MOVS:
3518 // assumes DF=0
3519 assert_operand_cnt(3);
3520 j = lmod_bytes(po, po->operand[0].lmod);
3521 strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod));
3522 if (po->flags & OPF_REP) {
3523 fprintf(fout,
3524 " for (; ecx != 0; ecx--, edi += %d, esi += %d)\n",
3525 j, j);
3526 fprintf(fout,
3527 " %sedi = %sesi;", buf1, buf1);
3528 strcpy(g_comment, "rep movs");
3529 }
3530 else {
3531 fprintf(fout, " %sedi = %sesi; edi += %d; esi += %d;",
3532 buf1, buf1, j, j);
3533 strcpy(g_comment, "movs");
3534 }
3535 break;
3536
7ba45c34 3537 case OP_CMPS:
3538 // assumes DF=0
3539 // repe ~ repeat while ZF=1
3540 assert_operand_cnt(3);
3541 j = lmod_bytes(po, po->operand[0].lmod);
3542 strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod));
3543 if (po->flags & OPF_REP) {
3544 fprintf(fout,
3545 " for (; ecx != 0; ecx--, edi += %d, esi += %d)\n",
3546 j, j);
3547 fprintf(fout,
3548 " if ((cond_z = (%sedi == %sesi)) %s 0)\n",
3549 buf1, buf1, (po->flags & OPF_REPZ) ? "==" : "!=");
3550 fprintf(fout,
3551 " break;");
3552 snprintf(g_comment, sizeof(g_comment), "rep%s cmps",
3553 (po->flags & OPF_REPZ) ? "e" : "ne");
3554 }
3555 else {
3556 fprintf(fout,
3557 " cond_z = (%sedi = %sesi); edi += %d; esi += %d;",
3558 buf1, buf1, j, j);
3559 strcpy(g_comment, "cmps");
3560 }
3561 pfomask &= ~(1 << PFO_Z);
3562 last_arith_dst = NULL;
3563 delayed_flag_op = NULL;
3564 break;
3565
850c9265 3566 // arithmetic w/flags
3567 case OP_ADD:
3568 case OP_SUB:
3569 case OP_AND:
3570 case OP_OR:
5101a5f9 3571 propagate_lmod(po, &po->operand[0], &po->operand[1]);
3572 // fallthrough
850c9265 3573 dualop_arith:
3574 assert_operand_cnt(2);
850c9265 3575 fprintf(fout, " %s %s= %s;",
3576 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
3577 op_to_c(po),
3ebea2cf 3578 out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
04f8a628 3579 output_std_flags(fout, po, &pfomask, buf1);
3580 last_arith_dst = &po->operand[0];
3581 delayed_flag_op = NULL;
3582 break;
3583
3584 case OP_SHL:
3585 case OP_SHR:
3586 assert_operand_cnt(2);
3587 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
3588 if (pfomask & (1 << PFO_C)) {
3589 if (po->operand[1].type == OPT_CONST) {
3590 l = lmod_bytes(po, po->operand[0].lmod) * 8;
3591 j = po->operand[1].val;
3592 j %= l;
3593 if (j != 0) {
3594 if (po->op == OP_SHL)
3595 j = l - j;
3596 else
3597 j -= 1;
3598 fprintf(fout, " cond_c = (%s & 0x%02x) ? 1 : 0;\n",
3599 buf1, 1 << j);
3600 }
3601 else
3602 ferr(po, "zero shift?\n");
3603 }
3604 else
3605 ferr(po, "TODO\n");
3606 pfomask &= ~(1 << PFO_C);
840257f6 3607 }
04f8a628 3608 fprintf(fout, " %s %s= %s;", buf1, op_to_c(po),
3609 out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
3610 output_std_flags(fout, po, &pfomask, buf1);
850c9265 3611 last_arith_dst = &po->operand[0];
69a3cdfc 3612 delayed_flag_op = NULL;
850c9265 3613 break;
3614
d4e3b5db 3615 case OP_SAR:
3616 assert_operand_cnt(2);
3617 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
3618 fprintf(fout, " %s = %s%s >> %s;", buf1,
3619 lmod_cast_s(po, po->operand[0].lmod), buf1,
3ebea2cf 3620 out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
04f8a628 3621 output_std_flags(fout, po, &pfomask, buf1);
d4e3b5db 3622 last_arith_dst = &po->operand[0];
3623 delayed_flag_op = NULL;
3624 break;
3625
3626 case OP_ROL:
3627 case OP_ROR:
3628 assert_operand_cnt(2);
3629 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
3630 if (po->operand[1].type == OPT_CONST) {
3631 j = po->operand[1].val;
3632 j %= lmod_bytes(po, po->operand[0].lmod) * 8;
3633 fprintf(fout, po->op == OP_ROL ?
3634 " %s = (%s << %d) | (%s >> %d);" :
3635 " %s = (%s >> %d) | (%s << %d);",
3636 buf1, buf1, j, buf1,
3637 lmod_bytes(po, po->operand[0].lmod) * 8 - j);
3638 }
3639 else
3640 ferr(po, "TODO\n");
04f8a628 3641 output_std_flags(fout, po, &pfomask, buf1);
d4e3b5db 3642 last_arith_dst = &po->operand[0];
3643 delayed_flag_op = NULL;
3644 break;
3645
5101a5f9 3646 case OP_XOR:
850c9265 3647 assert_operand_cnt(2);
3648 propagate_lmod(po, &po->operand[0], &po->operand[1]);
5101a5f9 3649 if (IS(opr_name(po, 0), opr_name(po, 1))) {
3650 // special case for XOR
3651 fprintf(fout, " %s = 0;",
3652 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]));
3653 last_arith_dst = &po->operand[0];
3654 delayed_flag_op = NULL;
850c9265 3655 break;
850c9265 3656 }
5101a5f9 3657 goto dualop_arith;
3658
5101a5f9 3659 case OP_ADC:
850c9265 3660 case OP_SBB:
5101a5f9 3661 assert_operand_cnt(2);
3662 propagate_lmod(po, &po->operand[0], &po->operand[1]);
a2c1d768 3663 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
840257f6 3664 if (po->op == OP_SBB
3665 && IS(po->operand[0].name, po->operand[1].name))
3666 {
3667 // avoid use of unitialized var
a2c1d768 3668 fprintf(fout, " %s = -cond_c;", buf1);
94d447fb 3669 // carry remains what it was
3670 pfomask &= ~(1 << PFO_C);
840257f6 3671 }
3672 else {
a2c1d768 3673 fprintf(fout, " %s %s= %s + cond_c;", buf1, op_to_c(po),
3ebea2cf 3674 out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
840257f6 3675 }
a2c1d768 3676 output_std_flags(fout, po, &pfomask, buf1);
5101a5f9 3677 last_arith_dst = &po->operand[0];
3678 delayed_flag_op = NULL;
850c9265 3679 break;
3680
3681 case OP_INC:
3682 case OP_DEC:
3683 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
1bafb621 3684 if (po->operand[0].type == OPT_REG) {
3685 strcpy(buf2, po->op == OP_INC ? "++" : "--");
3686 fprintf(fout, " %s%s;", buf1, buf2);
3687 }
3688 else {
3689 strcpy(buf2, po->op == OP_INC ? "+" : "-");
3690 fprintf(fout, " %s %s= 1;", buf1, buf2);
3691 }
a2c1d768 3692 output_std_flags(fout, po, &pfomask, buf1);
5101a5f9 3693 last_arith_dst = &po->operand[0];
3694 delayed_flag_op = NULL;
3695 break;
3696
3697 case OP_NEG:
3698 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
3ebea2cf 3699 out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]);
5101a5f9 3700 fprintf(fout, " %s = -%s%s;", buf1,
3701 lmod_cast_s(po, po->operand[0].lmod), buf2);
850c9265 3702 last_arith_dst = &po->operand[0];
69a3cdfc 3703 delayed_flag_op = NULL;
940e8e66 3704 if (pfomask & (1 << PFO_C)) {
3705 fprintf(fout, "\n cond_c = (%s != 0);", buf1);
3706 pfomask &= ~(1 << PFO_C);
3707 }
850c9265 3708 break;
3709
3710 case OP_IMUL:
de50b98b 3711 if (po->operand_cnt == 2) {
3712 propagate_lmod(po, &po->operand[0], &po->operand[1]);
850c9265 3713 goto dualop_arith;
de50b98b 3714 }
87bf6cec 3715 if (po->operand_cnt == 3)
3716 ferr(po, "TODO imul3\n");
3717 // fallthrough
3718 case OP_MUL:
3719 assert_operand_cnt(1);
3720 strcpy(buf1, po->op == OP_IMUL ? "(s64)(s32)" : "(u64)");
3721 fprintf(fout, " mul_tmp = %seax * %s%s;\n", buf1, buf1,
3ebea2cf 3722 out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]));
87bf6cec 3723 fprintf(fout, " edx = mul_tmp >> 32;\n");
3724 fprintf(fout, " eax = mul_tmp;");
3725 last_arith_dst = NULL;
69a3cdfc 3726 delayed_flag_op = NULL;
91977a1c 3727 break;
3728
5101a5f9 3729 case OP_DIV:
3730 case OP_IDIV:
3731 assert_operand_cnt(1);
3732 if (po->operand[0].lmod != OPLM_DWORD)
3733 ferr(po, "unhandled lmod %d\n", po->operand[0].lmod);
3734
3735 // 32bit division is common, look for it
64c59faf 3736 if (po->op == OP_DIV)
cdfaeed7 3737 ret = scan_for_reg_clear(i, xDX);
64c59faf 3738 else
cdfaeed7 3739 ret = scan_for_cdq_edx(i);
64c59faf 3740 if (ret >= 0) {
3ebea2cf 3741 out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
5101a5f9 3742 strcpy(buf2, lmod_cast(po, po->operand[0].lmod,
3743 po->op == OP_IDIV));
3744 fprintf(fout, " edx = %seax %% %s%s;\n", buf2, buf2, buf1);
3745 fprintf(fout, " eax = %seax / %s%s;", buf2, buf2, buf1);
3746 }
3747 else
3748 ferr(po, "TODO 64bit divident\n");
87bf6cec 3749 last_arith_dst = NULL;
3750 delayed_flag_op = NULL;
5101a5f9 3751 break;
3752
91977a1c 3753 case OP_TEST:
3754 case OP_CMP:
850c9265 3755 propagate_lmod(po, &po->operand[0], &po->operand[1]);
940e8e66 3756 if (pfomask != 0) {
69a3cdfc 3757 for (j = 0; j < 8; j++) {
940e8e66 3758 if (pfomask & (1 << j)) {
69a3cdfc 3759 out_cmp_test(buf1, sizeof(buf1), po, j, 0);
3760 fprintf(fout, " cond_%s = %s;",
3761 parsed_flag_op_names[j], buf1);
3762 }
3763 }
940e8e66 3764 pfomask = 0;
69a3cdfc 3765 }
3766 else
3767 no_output = 1;
7ba45c34 3768 last_arith_dst = NULL;
69a3cdfc 3769 delayed_flag_op = po;
91977a1c 3770 break;
3771
69a3cdfc 3772 // note: we reuse OP_Jcc for SETcc, only flags differ
91977a1c 3773 case OP_JO ... OP_JG:
5101a5f9 3774 if (po->flags & OPF_JMP)
850c9265 3775 fprintf(fout, " goto %s;", po->operand[0].name);
5101a5f9 3776 // else SETcc - should already be handled
850c9265 3777 break;
3778
3779 case OP_JMP:
87bf6cec 3780 assert_operand_cnt(1);
de50b98b 3781 last_arith_dst = NULL;
3782 delayed_flag_op = NULL;
3783
4c45fa73 3784 if (po->operand[0].type == OPT_REGMEM) {
3785 ret = sscanf(po->operand[0].name, "%[^[][%[^*]*4]",
3786 buf1, buf2);
3787 if (ret != 2)
3788 ferr(po, "parse failure for jmp '%s'\n",
3789 po->operand[0].name);
3790 fprintf(fout, " goto *jt_%s[%s];", buf1, buf2);
3791 break;
3792 }
3793 else if (po->operand[0].type != OPT_LABEL)
3794 ferr(po, "unhandled jmp type\n");
87bf6cec 3795
850c9265 3796 fprintf(fout, " goto %s;", po->operand[0].name);
91977a1c 3797 break;
3798
3799 case OP_CALL:
5101a5f9 3800 assert_operand_cnt(1);
850c9265 3801 pp = po->datap;
89ff3147 3802 my_assert_not(pp, NULL);
91977a1c 3803
89ff3147 3804 if (pp->is_fptr)
1cd4a663 3805 fprintf(fout, " icall%d = %s;\n", i,
3806 out_src_opr(buf1, sizeof(buf1), po, &po->operand[0],
3807 "(void *)", 0));
1bafb621 3808
91977a1c 3809 fprintf(fout, " ");
2b43685d 3810 if (strstr(pp->ret_type.name, "int64")) {
87bf6cec 3811 if (po->flags & OPF_TAIL)
2b43685d 3812 ferr(po, "int64 and tail?\n");
3813 fprintf(fout, "mul_tmp = ");
3814 }
3815 else if (!IS(pp->ret_type.name, "void")) {
3816 if (po->flags & OPF_TAIL) {
840257f6 3817 if (!IS(g_func_pp->ret_type.name, "void")) {
3818 fprintf(fout, "return ");
3819 if (g_func_pp->ret_type.is_ptr != pp->ret_type.is_ptr)
3820 fprintf(fout, "(%s)", g_func_pp->ret_type.name);
3821 }
2b43685d 3822 }
75ad0378 3823 else if (regmask & (1 << xAX)) {
87bf6cec 3824 fprintf(fout, "eax = ");
2b43685d 3825 if (pp->ret_type.is_ptr)
3826 fprintf(fout, "(u32)");
3827 }
91977a1c 3828 }
87bf6cec 3829
89ff3147 3830 if (pp->is_fptr) {
1bafb621 3831 fprintf(fout, "icall%d(", i);
39b168b8 3832 }
3833 else {
3834 if (pp->name[0] == 0)
3835 ferr(po, "missing pp->name\n");
a652aa9f 3836 fprintf(fout, "%s%s(", pp->name,
3837 pp->has_structarg ? "_sa" : "");
39b168b8 3838 }
3839
91977a1c 3840 for (arg = 0; arg < pp->argc; arg++) {
3841 if (arg > 0)
3842 fprintf(fout, ", ");
87bf6cec 3843
3ebea2cf 3844 cast[0] = 0;
3845 if (pp->arg[arg].type.is_ptr)
3846 snprintf(cast, sizeof(cast), "(%s)", pp->arg[arg].type.name);
87bf6cec 3847
91977a1c 3848 if (pp->arg[arg].reg != NULL) {
3ebea2cf 3849 fprintf(fout, "%s%s", cast, pp->arg[arg].reg);
91977a1c 3850 continue;
3851 }
3852
3853 // stack arg
3854 tmp_op = pp->arg[arg].datap;
3855 if (tmp_op == NULL)
850c9265 3856 ferr(po, "parsed_op missing for arg%d\n", arg);
de50b98b 3857 if (tmp_op->argnum != 0) {
3858 fprintf(fout, "%ss_a%d", cast, tmp_op->argnum);
69a3cdfc 3859 }
3860 else {
3861 fprintf(fout, "%s",
3862 out_src_opr(buf1, sizeof(buf1),
3ebea2cf 3863 tmp_op, &tmp_op->operand[0], cast, 0));
69a3cdfc 3864 }
91977a1c 3865 }
3866 fprintf(fout, ");");
87bf6cec 3867
2b43685d 3868 if (strstr(pp->ret_type.name, "int64")) {
3869 fprintf(fout, "\n");
3870 fprintf(fout, " edx = mul_tmp >> 32;\n");
3871 fprintf(fout, " eax = mul_tmp;");
3872 }
3873
89ff3147 3874 if (pp->is_unresolved) {
3875 snprintf(buf3, sizeof(buf3), "unresoved %dreg ",
3876 pp->argc_reg);
3877 strcat(g_comment, buf3);
3878 }
3879
87bf6cec 3880 if (po->flags & OPF_TAIL) {
840257f6 3881 ret = 0;
3882 if (i == opcnt - 1)
3883 ret = 0;
3884 else if (IS(pp->ret_type.name, "void"))
3885 ret = 1;
3886 else if (IS(g_func_pp->ret_type.name, "void"))
3887 ret = 1;
3888 // else already handled as 'return f()'
3889
3890 if (ret) {
da87ae38 3891 if (!IS(g_func_pp->ret_type.name, "void")) {
3892 if (!pp->is_noreturn)
3893 ferr(po, "int func -> void func tailcall?\n");
3894 strcat(g_comment, "tailcall noreturn");
3895 }
3896 else {
3897 fprintf(fout, "\n return;");
3898 strcat(g_comment, "^ tailcall");
3899 }
3ebea2cf 3900 }
89ff3147 3901 else
3902 strcat(g_comment, "tailcall");
87bf6cec 3903 }
3904 delayed_flag_op = NULL;
3905 last_arith_dst = NULL;
91977a1c 3906 break;
3907
3908 case OP_RET:
bd96f656 3909 if (g_func_pp->is_vararg)
4f12f671 3910 fprintf(fout, " va_end(ap);\n");
3911
bd96f656 3912 if (IS(g_func_pp->ret_type.name, "void")) {
3ebea2cf 3913 if (i != opcnt - 1 || label_pending)
3914 fprintf(fout, " return;");
3915 }
bd96f656 3916 else if (g_func_pp->ret_type.is_ptr) {
d4e3b5db 3917 fprintf(fout, " return (%s)eax;",
bd96f656 3918 g_func_pp->ret_type.name);
3ebea2cf 3919 }
91977a1c 3920 else
3921 fprintf(fout, " return eax;");
de50b98b 3922
3923 last_arith_dst = NULL;
3924 delayed_flag_op = NULL;
91977a1c 3925 break;
3926
3927 case OP_PUSH:
de50b98b 3928 if (po->argnum != 0) {
69a3cdfc 3929 // special case - saved func arg
3ebea2cf 3930 out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
de50b98b 3931 fprintf(fout, " s_a%d = %s;", po->argnum, buf1);
69a3cdfc 3932 break;
3933 }
d4e3b5db 3934 else if (po->flags & OPF_RSAVE) {
3ebea2cf 3935 out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
d4e3b5db 3936 fprintf(fout, " s_%s = %s;", buf1, buf1);
3937 break;
3938 }
e56ab892 3939 if (!(g_ida_func_attr & IDAFA_NORETURN))
3940 ferr(po, "stray push encountered\n");
3941 no_output = 1;
91977a1c 3942 break;
3943
3944 case OP_POP:
d4e3b5db 3945 if (po->flags & OPF_RSAVE) {
3ebea2cf 3946 out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
d4e3b5db 3947 fprintf(fout, " %s = s_%s;", buf1, buf1);
3948 break;
3949 }
3950 ferr(po, "stray pop encountered\n");
91977a1c 3951 break;
3952
33c35af6 3953 case OP_NOP:
2b43685d 3954 no_output = 1;
33c35af6 3955 break;
3956
91977a1c 3957 default:
3958 no_output = 1;
69a3cdfc 3959 ferr(po, "unhandled op type %d, flags %x\n",
3960 po->op, po->flags);
91977a1c 3961 break;
3962 }
3963
3964 if (g_comment[0] != 0) {
3965 fprintf(fout, " // %s", g_comment);
3966 g_comment[0] = 0;
3967 no_output = 0;
3968 }
3969 if (!no_output)
3970 fprintf(fout, "\n");
5101a5f9 3971
2b43685d 3972 // some sanity checking
3973 if ((po->flags & OPF_REP) && po->op != OP_STOS
3974 && po->op != OP_MOVS && po->op != OP_CMPS)
3975 ferr(po, "unexpected rep\n");
3976 if ((po->flags & (OPF_REPZ|OPF_REPNZ)) && po->op != OP_CMPS)
3977 ferr(po, "unexpected repz/repnz\n");
3978
940e8e66 3979 if (pfomask != 0)
7ba45c34 3980 ferr(po, "missed flag calc, pfomask=%x\n", pfomask);
940e8e66 3981
5101a5f9 3982 // see is delayed flag stuff is still valid
3983 if (delayed_flag_op != NULL && delayed_flag_op != po) {
89ff3147 3984 if (is_any_opr_modified(delayed_flag_op, po, 0))
5101a5f9 3985 delayed_flag_op = NULL;
3986 }
3987
3988 if (last_arith_dst != NULL && last_arith_dst != &po->operand[0]) {
3989 if (is_opr_modified(last_arith_dst, po))
3990 last_arith_dst = NULL;
3991 }
3ebea2cf 3992
3993 label_pending = 0;
91977a1c 3994 }
3995
a2c1d768 3996 if (g_stack_fsz && !g_stack_frame_used)
3997 fprintf(fout, " (void)sf;\n");
3998
91977a1c 3999 fprintf(fout, "}\n\n");
4000
4001 // cleanup
4002 for (i = 0; i < opcnt; i++) {
4c45fa73 4003 struct label_ref *lr, *lr_del;
4004
4005 lr = g_label_refs[i].next;
4006 while (lr != NULL) {
4007 lr_del = lr;
4008 lr = lr->next;
4009 free(lr_del);
4010 }
4011 g_label_refs[i].i = -1;
4012 g_label_refs[i].next = NULL;
4013
91977a1c 4014 if (ops[i].op == OP_CALL) {
4015 pp = ops[i].datap;
bd96f656 4016 if (pp)
91977a1c 4017 proto_release(pp);
91977a1c 4018 }
4019 }
bd96f656 4020 g_func_pp = NULL;
91977a1c 4021}
c36e914d 4022
d4e3b5db 4023static void set_label(int i, const char *name)
4024{
4025 const char *p;
4026 int len;
4027
4028 len = strlen(name);
4029 p = strchr(name, ':');
4030 if (p != NULL)
4031 len = p - name;
4032
4033 if (len > sizeof(g_labels[0]) - 1)
4034 aerr("label '%s' too long: %d\n", name, len);
e56ab892 4035 if (g_labels[i][0] != 0 && !IS_START(g_labels[i], "algn_"))
4036 aerr("dupe label '%s' vs '%s'?\n", name, g_labels[i]);
d4e3b5db 4037 memcpy(g_labels[i], name, len);
4038 g_labels[i][len] = 0;
4039}
4040
bfa4a6ee 4041// '=' needs special treatment..
4042static char *next_word_s(char *w, size_t wsize, char *s)
4043{
4044 size_t i;
4045
4046 s = sskip(s);
4047
4048 for (i = 0; i < wsize - 1; i++) {
4049 if (s[i] == 0 || my_isblank(s[i]) || (s[i] == '=' && i > 0))
4050 break;
4051 w[i] = s[i];
4052 }
4053 w[i] = 0;
4054
4055 if (s[i] != 0 && !my_isblank(s[i]) && s[i] != '=')
4056 printf("warning: '%s' truncated\n", w);
4057
4058 return s + i;
4059}
4060
e56ab892 4061struct chunk_item {
4062 char *name;
4063 long fptr;
de50b98b 4064 int asmln;
e56ab892 4065};
4066
cdfaeed7 4067static struct chunk_item *func_chunks;
4068static int func_chunk_cnt;
4069static int func_chunk_alloc;
4070
4071static void add_func_chunk(FILE *fasm, const char *name, int line)
4072{
4073 if (func_chunk_cnt >= func_chunk_alloc) {
4074 func_chunk_alloc *= 2;
4075 func_chunks = realloc(func_chunks,
4076 func_chunk_alloc * sizeof(func_chunks[0]));
4077 my_assert_not(func_chunks, NULL);
4078 }
4079 func_chunks[func_chunk_cnt].fptr = ftell(fasm);
4080 func_chunks[func_chunk_cnt].name = strdup(name);
4081 func_chunks[func_chunk_cnt].asmln = line;
4082 func_chunk_cnt++;
4083}
4084
e56ab892 4085static int cmp_chunks(const void *p1, const void *p2)
4086{
4087 const struct chunk_item *c1 = p1, *c2 = p2;
4088 return strcmp(c1->name, c2->name);
4089}
4090
bfa4a6ee 4091static int cmpstringp(const void *p1, const void *p2)
4092{
4093 return strcmp(*(char * const *)p1, *(char * const *)p2);
4094}
4095
cdfaeed7 4096static void scan_ahead(FILE *fasm)
4097{
4098 char words[2][256];
4099 char line[256];
4100 long oldpos;
4101 int oldasmln;
4102 int wordc;
4103 char *p;
4104 int i;
4105
4106 oldpos = ftell(fasm);
4107 oldasmln = asmln;
4108
4109 while (fgets(line, sizeof(line), fasm))
4110 {
4111 wordc = 0;
4112 asmln++;
4113
4114 p = sskip(line);
4115 if (*p == 0)
4116 continue;
4117
4118 if (*p == ';')
4119 {
4120 // get rid of random tabs
4121 for (i = 0; line[i] != 0; i++)
4122 if (line[i] == '\t')
4123 line[i] = ' ';
4124
4125 if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR "))
4126 {
4127 p += 30;
4128 next_word(words[0], sizeof(words[0]), p);
4129 if (words[0][0] == 0)
4130 aerr("missing name for func chunk?\n");
4131
4132 add_func_chunk(fasm, words[0], asmln);
4133 }
4134 continue;
4135 } // *p == ';'
4136
4137 for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) {
4138 words[wordc][0] = 0;
4139 p = sskip(next_word_s(words[wordc], sizeof(words[0]), p));
4140 if (*p == 0 || *p == ';') {
4141 wordc++;
4142 break;
4143 }
4144 }
4145
4146 if (wordc == 2 && IS(words[1], "ends"))
4147 break;
4148 }
4149
4150 fseek(fasm, oldpos, SEEK_SET);
4151 asmln = oldasmln;
4152}
4153
91977a1c 4154int main(int argc, char *argv[])
4155{
06c5d854 4156 FILE *fout, *fasm, *frlist;
4c45fa73 4157 struct parsed_data *pd = NULL;
4158 int pd_alloc = 0;
4159 char **rlist = NULL;
4160 int rlist_len = 0;
4161 int rlist_alloc = 0;
e56ab892 4162 int func_chunks_used = 0;
4163 int func_chunks_sorted = 0;
e56ab892 4164 int func_chunk_i = -1;
4165 long func_chunk_ret = 0;
de50b98b 4166 int func_chunk_ret_ln = 0;
cdfaeed7 4167 int scanned_ahead = 0;
91977a1c 4168 char line[256];
a2c1d768 4169 char words[20][256];
4c45fa73 4170 enum opr_lenmod lmod;
91977a1c 4171 int in_func = 0;
4c45fa73 4172 int pending_endp = 0;
bfa4a6ee 4173 int skip_func = 0;
940e8e66 4174 int skip_warned = 0;
91977a1c 4175 int eq_alloc;
bfa4a6ee 4176 int verbose = 0;
4177 int arg_out;
89ff3147 4178 int arg;
91977a1c 4179 int pi = 0;
e56ab892 4180 int i, j;
4181 int ret, len;
91977a1c 4182 char *p;
4183 int wordc;
4184
89ff3147 4185 for (arg = 1; arg < argc; arg++) {
4186 if (IS(argv[arg], "-v"))
4187 verbose = 1;
4188 else if (IS(argv[arg], "-rf"))
4189 g_allow_regfunc = 1;
4190 else
4191 break;
bfa4a6ee 4192 }
4193
4194 if (argc < arg + 3) {
89ff3147 4195 printf("usage:\n%s [-v] [-rf] <.c> <.asm> <hdrf> [rlist]*\n",
91977a1c 4196 argv[0]);
4197 return 1;
4198 }
4199
bfa4a6ee 4200 arg_out = arg++;
91977a1c 4201
bfa4a6ee 4202 asmfn = argv[arg++];
91977a1c 4203 fasm = fopen(asmfn, "r");
4204 my_assert_not(fasm, NULL);
4205
bfa4a6ee 4206 hdrfn = argv[arg++];
06c5d854 4207 g_fhdr = fopen(hdrfn, "r");
4208 my_assert_not(g_fhdr, NULL);
bfa4a6ee 4209
4210 rlist_alloc = 64;
4211 rlist = malloc(rlist_alloc * sizeof(rlist[0]));
4212 my_assert_not(rlist, NULL);
4213 // needs special handling..
4214 rlist[rlist_len++] = "__alloca_probe";
4215
e56ab892 4216 func_chunk_alloc = 32;
4217 func_chunks = malloc(func_chunk_alloc * sizeof(func_chunks[0]));
4218 my_assert_not(func_chunks, NULL);
4219
a2c1d768 4220 memset(words, 0, sizeof(words));
4221
bfa4a6ee 4222 for (; arg < argc; arg++) {
4223 frlist = fopen(argv[arg], "r");
4224 my_assert_not(frlist, NULL);
4225
4226 while (fgets(line, sizeof(line), frlist)) {
4227 p = sskip(line);
1cd4a663 4228 if (*p == 0 || *p == ';')
4229 continue;
4230 if (*p == '#') {
89ff3147 4231 if (IS_START(p, "#if 0")
4232 || (g_allow_regfunc && IS_START(p, "#if NO_REGFUNC")))
4233 {
1cd4a663 4234 skip_func = 1;
89ff3147 4235 }
1cd4a663 4236 else if (IS_START(p, "#endif"))
4237 skip_func = 0;
4238 continue;
4239 }
4240 if (skip_func)
bfa4a6ee 4241 continue;
4242
4243 p = next_word(words[0], sizeof(words[0]), p);
4244 if (words[0][0] == 0)
4245 continue;
4246
4247 if (rlist_len >= rlist_alloc) {
4248 rlist_alloc = rlist_alloc * 2 + 64;
4249 rlist = realloc(rlist, rlist_alloc * sizeof(rlist[0]));
4250 my_assert_not(rlist, NULL);
4251 }
4252 rlist[rlist_len++] = strdup(words[0]);
4253 }
1cd4a663 4254 skip_func = 0;
bfa4a6ee 4255
4256 fclose(frlist);
4257 frlist = NULL;
4258 }
4259
4260 if (rlist_len > 0)
4261 qsort(rlist, rlist_len, sizeof(rlist[0]), cmpstringp);
4262
4263 fout = fopen(argv[arg_out], "w");
91977a1c 4264 my_assert_not(fout, NULL);
4265
4266 eq_alloc = 128;
4267 g_eqs = malloc(eq_alloc * sizeof(g_eqs[0]));
4268 my_assert_not(g_eqs, NULL);
4269
4c45fa73 4270 for (i = 0; i < ARRAY_SIZE(g_label_refs); i++) {
4271 g_label_refs[i].i = -1;
4272 g_label_refs[i].next = NULL;
4273 }
4274
91977a1c 4275 while (fgets(line, sizeof(line), fasm))
4276 {
4c45fa73 4277 wordc = 0;
91977a1c 4278 asmln++;
4279
4280 p = sskip(line);
1bafb621 4281 if (*p == 0)
91977a1c 4282 continue;
4283
de50b98b 4284 // get rid of random tabs
4285 for (i = 0; line[i] != 0; i++)
4286 if (line[i] == '\t')
4287 line[i] = ' ';
4288
e56ab892 4289 if (*p == ';')
4290 {
e56ab892 4291 if (p[2] == '=' && IS_START(p, "; =============== S U B"))
4292 goto do_pending_endp; // eww..
4293
4294 if (p[2] == 'A' && IS_START(p, "; Attributes:"))
4295 {
4296 static const char *attrs[] = {
4297 "bp-based frame",
4298 "library function",
4299 "static",
4300 "noreturn",
4301 "thunk",
4302 "fpd=",
4303 };
4304
4305 // parse IDA's attribute-list comment
4306 g_ida_func_attr = 0;
4307 p = sskip(p + 13);
4308
4309 for (; *p != 0; p = sskip(p)) {
4310 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
4311 if (!strncmp(p, attrs[i], strlen(attrs[i]))) {
4312 g_ida_func_attr |= 1 << i;
4313 p += strlen(attrs[i]);
4314 break;
4315 }
4316 }
4317 if (i == ARRAY_SIZE(attrs)) {
4318 anote("unparsed IDA attr: %s\n", p);
1bafb621 4319 break;
4320 }
e56ab892 4321 if (IS(attrs[i], "fpd=")) {
4322 p = next_word(words[0], sizeof(words[0]), p);
4323 // ignore for now..
4324 }
1bafb621 4325 }
e56ab892 4326 }
4327 else if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR "))
4328 {
4329 p += 30;
4330 next_word(words[0], sizeof(words[0]), p);
4331 if (words[0][0] == 0)
cdfaeed7 4332 aerr("missing name for func chunk?\n");
4333
4334 if (!scanned_ahead) {
4335 add_func_chunk(fasm, words[0], asmln);
4336 func_chunks_sorted = 0;
e56ab892 4337 }
e56ab892 4338 }
4339 else if (p[2] == 'E' && IS_START(p, "; END OF FUNCTION CHUNK"))
4340 {
4341 if (func_chunk_i >= 0) {
4342 if (func_chunk_i < func_chunk_cnt
4343 && IS(func_chunks[func_chunk_i].name, g_func))
4344 {
4345 // move on to next chunk
4346 ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET);
4347 if (ret)
4348 aerr("seek failed for '%s' chunk #%d\n",
4349 g_func, func_chunk_i);
de50b98b 4350 asmln = func_chunks[func_chunk_i].asmln;
e56ab892 4351 func_chunk_i++;
4352 }
4353 else {
4354 if (func_chunk_ret == 0)
4355 aerr("no return from chunk?\n");
4356 fseek(fasm, func_chunk_ret, SEEK_SET);
de50b98b 4357 asmln = func_chunk_ret_ln;
e56ab892 4358 func_chunk_ret = 0;
4359 pending_endp = 1;
4360 }
1bafb621 4361 }
e56ab892 4362 }
4363 else if (p[2] == 'F' && IS_START(p, "; FUNCTION CHUNK AT ")) {
4364 func_chunks_used = 1;
4365 p += 20;
4366 if (IS_START(g_func, "sub_")) {
4367 unsigned long addr = strtoul(p, NULL, 16);
4368 unsigned long f_addr = strtoul(g_func + 4, NULL, 16);
cdfaeed7 4369 if (addr > f_addr && !scanned_ahead) {
94d447fb 4370 anote("scan_ahead caused by '%s', addr %lx\n",
4371 g_func, addr);
cdfaeed7 4372 scan_ahead(fasm);
4373 scanned_ahead = 1;
4374 func_chunks_sorted = 0;
4375 }
1bafb621 4376 }
4377 }
4378 continue;
e56ab892 4379 } // *p == ';'
1bafb621 4380
06c5d854 4381parse_words:
a2c1d768 4382 for (i = wordc; i < ARRAY_SIZE(words); i++)
4383 words[i][0] = 0;
cdfaeed7 4384 for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) {
bfa4a6ee 4385 p = sskip(next_word_s(words[wordc], sizeof(words[0]), p));
91977a1c 4386 if (*p == 0 || *p == ';') {
4387 wordc++;
4388 break;
4389 }
4390 }
a2c1d768 4391 if (*p != 0 && *p != ';')
4392 aerr("too many words\n");
91977a1c 4393
06c5d854 4394 // alow asm patches in comments
3ebea2cf 4395 if (*p == ';' && IS_START(p, "; sctpatch:")) {
4396 p = sskip(p + 11);
06c5d854 4397 if (*p == 0 || *p == ';')
4398 continue;
4399 goto parse_words; // lame
4400 }
4401
91977a1c 4402 if (wordc == 0) {
4403 // shouldn't happen
4404 awarn("wordc == 0?\n");
4405 continue;
4406 }
4407
4408 // don't care about this:
4409 if (words[0][0] == '.'
4410 || IS(words[0], "include")
4411 || IS(words[0], "assume") || IS(words[1], "segment")
4412 || IS(words[0], "align"))
4413 {
4414 continue;
4415 }
4416
4c45fa73 4417do_pending_endp:
4418 // do delayed endp processing to collect switch jumptables
4419 if (pending_endp) {
4420 if (in_func && !skip_func && wordc >= 2
4421 && ((words[0][0] == 'd' && words[0][2] == 0)
4422 || (words[1][0] == 'd' && words[1][2] == 0)))
4423 {
4424 i = 1;
4425 if (words[1][0] == 'd' && words[1][2] == 0) {
4426 // label
4427 if (g_func_pd_cnt >= pd_alloc) {
4428 pd_alloc = pd_alloc * 2 + 16;
4429 g_func_pd = realloc(g_func_pd,
4430 sizeof(g_func_pd[0]) * pd_alloc);
4431 my_assert_not(g_func_pd, NULL);
4432 }
4433 pd = &g_func_pd[g_func_pd_cnt];
4434 g_func_pd_cnt++;
4435 memset(pd, 0, sizeof(*pd));
4436 strcpy(pd->label, words[0]);
4437 pd->type = OPT_CONST;
4438 pd->lmod = lmod_from_directive(words[1]);
4439 i = 2;
4440 }
4441 else {
da87ae38 4442 if (pd == NULL) {
4443 if (verbose)
4444 anote("skipping alignment byte?\n");
4445 continue;
4446 }
4c45fa73 4447 lmod = lmod_from_directive(words[0]);
4448 if (lmod != pd->lmod)
4449 aerr("lmod change? %d->%d\n", pd->lmod, lmod);
4450 }
4451
4452 if (pd->count_alloc < pd->count + wordc) {
4453 pd->count_alloc = pd->count_alloc * 2 + 14 + wordc;
4454 pd->d = realloc(pd->d, sizeof(pd->d[0]) * pd->count_alloc);
4455 my_assert_not(pd->d, NULL);
4456 }
4457 for (; i < wordc; i++) {
4458 if (IS(words[i], "offset")) {
4459 pd->type = OPT_OFFSET;
4460 i++;
4461 }
4462 p = strchr(words[i], ',');
4463 if (p != NULL)
4464 *p = 0;
4465 if (pd->type == OPT_OFFSET)
4466 pd->d[pd->count].u.label = strdup(words[i]);
4467 else
4468 pd->d[pd->count].u.val = parse_number(words[i]);
4469 pd->d[pd->count].bt_i = -1;
4470 pd->count++;
4471 }
4472 continue;
4473 }
4474
4475 if (in_func && !skip_func)
4476 gen_func(fout, g_fhdr, g_func, pi);
4477
4478 pending_endp = 0;
4479 in_func = 0;
4480 g_ida_func_attr = 0;
4481 skip_warned = 0;
4482 skip_func = 0;
4483 g_func[0] = 0;
e56ab892 4484 func_chunks_used = 0;
4485 func_chunk_i = -1;
4c45fa73 4486 if (pi != 0) {
4487 memset(&ops, 0, pi * sizeof(ops[0]));
4488 memset(g_labels, 0, pi * sizeof(g_labels[0]));
4489 pi = 0;
4490 }
4491 g_eqcnt = 0;
4492 for (i = 0; i < g_func_pd_cnt; i++) {
4493 pd = &g_func_pd[i];
4494 if (pd->type == OPT_OFFSET) {
4495 for (j = 0; j < pd->count; j++)
4496 free(pd->d[j].u.label);
4497 }
4498 free(pd->d);
4499 pd->d = NULL;
4500 }
4501 g_func_pd_cnt = 0;
4502 pd = NULL;
4503 if (wordc == 0)
4504 continue;
4505 }
4506
91977a1c 4507 if (IS(words[1], "proc")) {
4508 if (in_func)
4509 aerr("proc '%s' while in_func '%s'?\n",
4510 words[0], g_func);
bfa4a6ee 4511 p = words[0];
4c45fa73 4512 if ((g_ida_func_attr & IDAFA_THUNK)
1bafb621 4513 || bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp))
bfa4a6ee 4514 skip_func = 1;
91977a1c 4515 strcpy(g_func, words[0]);
d4e3b5db 4516 set_label(0, words[0]);
91977a1c 4517 in_func = 1;
4518 continue;
4519 }
4520
e56ab892 4521 if (IS(words[1], "endp"))
4522 {
91977a1c 4523 if (!in_func)
4524 aerr("endp '%s' while not in_func?\n", words[0]);
4525 if (!IS(g_func, words[0]))
4526 aerr("endp '%s' while in_func '%s'?\n",
4527 words[0], g_func);
bfa4a6ee 4528
e56ab892 4529 if (!skip_func && func_chunks_used) {
4530 // start processing chunks
4531 struct chunk_item *ci, key = { g_func, 0 };
4532
4533 func_chunk_ret = ftell(fasm);
de50b98b 4534 func_chunk_ret_ln = asmln;
e56ab892 4535 if (!func_chunks_sorted) {
4536 qsort(func_chunks, func_chunk_cnt,
4537 sizeof(func_chunks[0]), cmp_chunks);
4538 func_chunks_sorted = 1;
4539 }
4540 ci = bsearch(&key, func_chunks, func_chunk_cnt,
4541 sizeof(func_chunks[0]), cmp_chunks);
4542 if (ci == NULL)
4543 aerr("'%s' needs chunks, but none found\n", g_func);
4544 func_chunk_i = ci - func_chunks;
4545 for (; func_chunk_i > 0; func_chunk_i--)
4546 if (!IS(func_chunks[func_chunk_i - 1].name, g_func))
4547 break;
4548
4549 ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET);
4550 if (ret)
4551 aerr("seek failed for '%s' chunk #%d\n", g_func, func_chunk_i);
de50b98b 4552 asmln = func_chunks[func_chunk_i].asmln;
e56ab892 4553 func_chunk_i++;
4554 continue;
4555 }
4c45fa73 4556 pending_endp = 1;
91977a1c 4557 continue;
4558 }
4559
a2c1d768 4560 if (wordc == 2 && IS(words[1], "ends"))
4561 break;
4562
bfa4a6ee 4563 p = strchr(words[0], ':');
4564 if (p != NULL) {
d4e3b5db 4565 set_label(pi, words[0]);
bfa4a6ee 4566 continue;
4567 }
4568
4569 if (!in_func || skip_func) {
4570 if (!skip_warned && !skip_func && g_labels[pi][0] != 0) {
4571 if (verbose)
4572 anote("skipping from '%s'\n", g_labels[pi]);
4573 skip_warned = 1;
4574 }
4575 g_labels[pi][0] = 0;
4576 continue;
4577 }
4578
4c45fa73 4579 if (wordc > 1 && IS(words[1], "=")) {
91977a1c 4580 if (wordc != 5)
4581 aerr("unhandled equ, wc=%d\n", wordc);
4582 if (g_eqcnt >= eq_alloc) {
4583 eq_alloc *= 2;
4584 g_eqs = realloc(g_eqs, eq_alloc * sizeof(g_eqs[0]));
4585 my_assert_not(g_eqs, NULL);
4586 }
4587
4588 len = strlen(words[0]);
4589 if (len > sizeof(g_eqs[0].name) - 1)
4590 aerr("equ name too long: %d\n", len);
4591 strcpy(g_eqs[g_eqcnt].name, words[0]);
4592
4593 if (!IS(words[3], "ptr"))
4594 aerr("unhandled equ\n");
4595 if (IS(words[2], "dword"))
4596 g_eqs[g_eqcnt].lmod = OPLM_DWORD;
4597 else if (IS(words[2], "word"))
4598 g_eqs[g_eqcnt].lmod = OPLM_WORD;
4599 else if (IS(words[2], "byte"))
4600 g_eqs[g_eqcnt].lmod = OPLM_BYTE;
4601 else
4602 aerr("bad lmod: '%s'\n", words[2]);
4603
4604 g_eqs[g_eqcnt].offset = parse_number(words[4]);
4605 g_eqcnt++;
4606 continue;
4607 }
4608
4609 if (pi >= ARRAY_SIZE(ops))
4610 aerr("too many ops\n");
4611
91977a1c 4612 parse_op(&ops[pi], words, wordc);
4613 pi++;
91977a1c 4614 }
4615
4616 fclose(fout);
4617 fclose(fasm);
06c5d854 4618 fclose(g_fhdr);
91977a1c 4619
4620 return 0;
c36e914d 4621}
91977a1c 4622
4623// vim:ts=2:shiftwidth=2:expandtab
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