| 1 | /* |
| 2 | * ia32rtools |
| 3 | * (C) notaz, 2013-2015 |
| 4 | * |
| 5 | * This work is licensed under the terms of 3-clause BSD license. |
| 6 | * See COPYING file in the top-level directory. |
| 7 | */ |
| 8 | |
| 9 | #define _GNU_SOURCE |
| 10 | #include <stdio.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <string.h> |
| 13 | |
| 14 | #include "my_assert.h" |
| 15 | #include "my_str.h" |
| 16 | #include "common.h" |
| 17 | |
| 18 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) |
| 19 | #define IS(w, y) !strcmp(w, y) |
| 20 | #define IS_START(w, y) !strncmp(w, y, strlen(y)) |
| 21 | |
| 22 | #include "protoparse.h" |
| 23 | |
| 24 | static const char *asmfn; |
| 25 | static int asmln; |
| 26 | static FILE *g_fhdr; |
| 27 | |
| 28 | #define anote(fmt, ...) \ |
| 29 | printf("%s:%d: note: " fmt, asmfn, asmln, ##__VA_ARGS__) |
| 30 | #define awarn(fmt, ...) \ |
| 31 | printf("%s:%d: warning: " fmt, asmfn, asmln, ##__VA_ARGS__) |
| 32 | #define aerr(fmt, ...) do { \ |
| 33 | printf("%s:%d: error: " fmt, asmfn, asmln, ##__VA_ARGS__); \ |
| 34 | fcloseall(); \ |
| 35 | exit(1); \ |
| 36 | } while (0) |
| 37 | |
| 38 | #include "masm_tools.h" |
| 39 | |
| 40 | enum op_flags { |
| 41 | OPF_RMD = (1 << 0), /* removed from code generation */ |
| 42 | OPF_DATA = (1 << 1), /* data processing - writes to dst opr */ |
| 43 | OPF_FLAGS = (1 << 2), /* sets flags */ |
| 44 | OPF_JMP = (1 << 3), /* branch, call */ |
| 45 | OPF_CJMP = (1 << 4), /* cond. branch (cc or jecxz/loop) */ |
| 46 | OPF_CC = (1 << 5), /* uses flags */ |
| 47 | OPF_TAIL = (1 << 6), /* ret or tail call */ |
| 48 | OPF_RSAVE = (1 << 7), /* push/pop is local reg save/load */ |
| 49 | OPF_REP = (1 << 8), /* prefixed by rep */ |
| 50 | OPF_REPZ = (1 << 9), /* rep is repe/repz */ |
| 51 | OPF_REPNZ = (1 << 10), /* rep is repne/repnz */ |
| 52 | OPF_FARG = (1 << 11), /* push collected as func arg */ |
| 53 | OPF_FARGNR = (1 << 12), /* push collected as func arg (no reuse) */ |
| 54 | OPF_EBP_S = (1 << 13), /* ebp used as scratch here, not BP */ |
| 55 | OPF_DF = (1 << 14), /* DF flag set */ |
| 56 | OPF_ATAIL = (1 << 15), /* tail call with reused arg frame */ |
| 57 | OPF_32BIT = (1 << 16), /* 32bit division */ |
| 58 | OPF_LOCK = (1 << 17), /* op has lock prefix */ |
| 59 | OPF_VAPUSH = (1 << 18), /* vararg ptr push (as call arg) */ |
| 60 | OPF_DONE = (1 << 19), /* already fully handled by analysis */ |
| 61 | OPF_PPUSH = (1 << 20), /* part of complex push-pop graph */ |
| 62 | OPF_NOREGS = (1 << 21), /* don't track regs of this op */ |
| 63 | OPF_FPUSH = (1 << 22), /* pushes x87 stack */ |
| 64 | OPF_FPOP = (1 << 23), /* pops x87 stack */ |
| 65 | OPF_FSHIFT = (1 << 24), /* x87 stack shift is actually needed */ |
| 66 | }; |
| 67 | |
| 68 | enum op_op { |
| 69 | OP_INVAL, |
| 70 | OP_NOP, |
| 71 | OP_PUSH, |
| 72 | OP_POP, |
| 73 | OP_PUSHA, |
| 74 | OP_POPA, |
| 75 | OP_LEAVE, |
| 76 | OP_MOV, |
| 77 | OP_LEA, |
| 78 | OP_MOVZX, |
| 79 | OP_MOVSX, |
| 80 | OP_XCHG, |
| 81 | OP_NOT, |
| 82 | OP_XLAT, |
| 83 | OP_CDQ, |
| 84 | OP_BSWAP, |
| 85 | OP_LODS, |
| 86 | OP_STOS, |
| 87 | OP_MOVS, |
| 88 | OP_CMPS, |
| 89 | OP_SCAS, |
| 90 | OP_STD, |
| 91 | OP_CLD, |
| 92 | OP_RET, |
| 93 | OP_ADD, |
| 94 | OP_SUB, |
| 95 | OP_AND, |
| 96 | OP_OR, |
| 97 | OP_XOR, |
| 98 | OP_SHL, |
| 99 | OP_SHR, |
| 100 | OP_SAR, |
| 101 | OP_SHLD, |
| 102 | OP_SHRD, |
| 103 | OP_ROL, |
| 104 | OP_ROR, |
| 105 | OP_RCL, |
| 106 | OP_RCR, |
| 107 | OP_ADC, |
| 108 | OP_SBB, |
| 109 | OP_BSF, |
| 110 | OP_INC, |
| 111 | OP_DEC, |
| 112 | OP_NEG, |
| 113 | OP_MUL, |
| 114 | OP_IMUL, |
| 115 | OP_DIV, |
| 116 | OP_IDIV, |
| 117 | OP_TEST, |
| 118 | OP_CMP, |
| 119 | OP_CALL, |
| 120 | OP_JMP, |
| 121 | OP_JECXZ, |
| 122 | OP_LOOP, |
| 123 | OP_JCC, |
| 124 | OP_SCC, |
| 125 | // x87 |
| 126 | OP_FLD, |
| 127 | OP_FILD, |
| 128 | OP_FLDc, |
| 129 | OP_FST, |
| 130 | OP_FIST, |
| 131 | OP_FADD, |
| 132 | OP_FDIV, |
| 133 | OP_FMUL, |
| 134 | OP_FSUB, |
| 135 | OP_FDIVR, |
| 136 | OP_FSUBR, |
| 137 | OP_FIADD, |
| 138 | OP_FIDIV, |
| 139 | OP_FIMUL, |
| 140 | OP_FISUB, |
| 141 | OP_FIDIVR, |
| 142 | OP_FISUBR, |
| 143 | OP_FCOM, |
| 144 | OP_FNSTSW, |
| 145 | OP_FCHS, |
| 146 | OP_FCOS, |
| 147 | OP_FPATAN, |
| 148 | OP_FPTAN, |
| 149 | OP_FSIN, |
| 150 | OP_FSQRT, |
| 151 | OP_FXCH, |
| 152 | OP_FYL2X, |
| 153 | // mmx |
| 154 | OP_EMMS, |
| 155 | // pseudo-ops for lib calls |
| 156 | OPP_ALLSHL, |
| 157 | OPP_ALLSHR, |
| 158 | OPP_FTOL, |
| 159 | OPP_CIPOW, |
| 160 | OPP_ABORT, |
| 161 | // undefined |
| 162 | OP_UD2, |
| 163 | }; |
| 164 | |
| 165 | enum opr_type { |
| 166 | OPT_UNSPEC, |
| 167 | OPT_REG, |
| 168 | OPT_REGMEM, |
| 169 | OPT_LABEL, |
| 170 | OPT_OFFSET, |
| 171 | OPT_CONST, |
| 172 | }; |
| 173 | |
| 174 | // must be sorted (larger len must be further in enum) |
| 175 | enum opr_lenmod { |
| 176 | OPLM_UNSPEC, |
| 177 | OPLM_BYTE, |
| 178 | OPLM_WORD, |
| 179 | OPLM_DWORD, |
| 180 | OPLM_QWORD, |
| 181 | }; |
| 182 | |
| 183 | #define MAX_EXITS 128 |
| 184 | |
| 185 | #define MAX_OPERANDS 3 |
| 186 | #define NAMELEN 112 |
| 187 | |
| 188 | #define OPR_INIT(type_, lmod_, reg_) \ |
| 189 | { type_, lmod_, reg_, } |
| 190 | |
| 191 | struct parsed_opr { |
| 192 | enum opr_type type; |
| 193 | enum opr_lenmod lmod; |
| 194 | int reg; |
| 195 | unsigned int is_ptr:1; // pointer in C |
| 196 | unsigned int is_array:1; // array in C |
| 197 | unsigned int type_from_var:1; // .. in header, sometimes wrong |
| 198 | unsigned int size_mismatch:1; // type override differs from C |
| 199 | unsigned int size_lt:1; // type override is larger than C |
| 200 | unsigned int had_ds:1; // had ds: prefix |
| 201 | const struct parsed_proto *pp; // for OPT_LABEL |
| 202 | unsigned int val; |
| 203 | char name[NAMELEN]; |
| 204 | }; |
| 205 | |
| 206 | struct parsed_op { |
| 207 | enum op_op op; |
| 208 | struct parsed_opr operand[MAX_OPERANDS]; |
| 209 | unsigned int flags; |
| 210 | unsigned char pfo; |
| 211 | unsigned char pfo_inv; |
| 212 | unsigned char operand_cnt; |
| 213 | unsigned char p_argnum; // arg push: altered before call arg # |
| 214 | unsigned char p_arggrp; // arg push: arg group # for above |
| 215 | unsigned char p_argpass;// arg push: arg of host func |
| 216 | short p_argnext;// arg push: same arg pushed elsewhere or -1 |
| 217 | int regmask_src; // all referensed regs |
| 218 | int regmask_dst; |
| 219 | int pfomask; // flagop: parsed_flag_op that can't be delayed |
| 220 | int cc_scratch; // scratch storage during analysis |
| 221 | int bt_i; // branch target for branches |
| 222 | struct parsed_data *btj;// branch targets for jumptables |
| 223 | struct parsed_proto *pp;// parsed_proto for OP_CALL |
| 224 | void *datap; |
| 225 | int asmln; |
| 226 | }; |
| 227 | |
| 228 | // datap: |
| 229 | // on start: function/data type hint (sctproto) |
| 230 | // after analysis: |
| 231 | // (OPF_CC) - points to one of (OPF_FLAGS) that affects cc op |
| 232 | // OP_PUSH - points to OP_POP in complex push/pop graph |
| 233 | // OP_POP - points to OP_PUSH in simple push/pop pair |
| 234 | // OP_FCOM - needed_status_word_bits | (is_z_check << 16) |
| 235 | |
| 236 | struct parsed_equ { |
| 237 | char name[64]; |
| 238 | enum opr_lenmod lmod; |
| 239 | int offset; |
| 240 | }; |
| 241 | |
| 242 | struct parsed_data { |
| 243 | char label[256]; |
| 244 | enum opr_type type; |
| 245 | enum opr_lenmod lmod; |
| 246 | int count; |
| 247 | int count_alloc; |
| 248 | struct { |
| 249 | union { |
| 250 | char *label; |
| 251 | unsigned int val; |
| 252 | } u; |
| 253 | int bt_i; |
| 254 | } *d; |
| 255 | }; |
| 256 | |
| 257 | struct label_ref { |
| 258 | int i; |
| 259 | struct label_ref *next; |
| 260 | }; |
| 261 | |
| 262 | enum ida_func_attr { |
| 263 | IDAFA_BP_FRAME = (1 << 0), |
| 264 | IDAFA_LIB_FUNC = (1 << 1), |
| 265 | IDAFA_STATIC = (1 << 2), |
| 266 | IDAFA_NORETURN = (1 << 3), |
| 267 | IDAFA_THUNK = (1 << 4), |
| 268 | IDAFA_FPD = (1 << 5), |
| 269 | }; |
| 270 | |
| 271 | enum sct_func_attr { |
| 272 | SCTFA_CLEAR_SF = (1 << 0), // clear stack frame |
| 273 | SCTFA_CLEAR_REGS = (1 << 1), // clear registers (mask) |
| 274 | }; |
| 275 | |
| 276 | enum x87_const { |
| 277 | X87_CONST_1 = 1, |
| 278 | X87_CONST_2T, |
| 279 | X87_CONST_2E, |
| 280 | X87_CONST_PI, |
| 281 | X87_CONST_LG2, |
| 282 | X87_CONST_LN2, |
| 283 | X87_CONST_Z, |
| 284 | }; |
| 285 | |
| 286 | // note: limited to 32k due to p_argnext |
| 287 | #define MAX_OPS 4096 |
| 288 | #define MAX_ARG_GRP 2 |
| 289 | |
| 290 | static struct parsed_op ops[MAX_OPS]; |
| 291 | static struct parsed_equ *g_eqs; |
| 292 | static int g_eqcnt; |
| 293 | static char *g_labels[MAX_OPS]; |
| 294 | static struct label_ref g_label_refs[MAX_OPS]; |
| 295 | static const struct parsed_proto *g_func_pp; |
| 296 | static struct parsed_data *g_func_pd; |
| 297 | static int g_func_pd_cnt; |
| 298 | static int g_func_lmods; |
| 299 | static char g_func[256]; |
| 300 | static char g_comment[256]; |
| 301 | static int g_bp_frame; |
| 302 | static int g_sp_frame; |
| 303 | static int g_stack_frame_used; |
| 304 | static int g_stack_fsz; |
| 305 | static int g_ida_func_attr; |
| 306 | static int g_sct_func_attr; |
| 307 | static int g_stack_clear_start; // in dwords |
| 308 | static int g_stack_clear_len; |
| 309 | static int g_regmask_init; |
| 310 | static int g_skip_func; |
| 311 | static int g_allow_regfunc; |
| 312 | static int g_allow_user_icall; |
| 313 | static int g_quiet_pp; |
| 314 | static int g_header_mode; |
| 315 | |
| 316 | #define ferr(op_, fmt, ...) do { \ |
| 317 | printf("%s:%d: error %u: [%s] '%s': " fmt, asmfn, (op_)->asmln, \ |
| 318 | __LINE__, g_func, dump_op(op_), ##__VA_ARGS__); \ |
| 319 | fcloseall(); \ |
| 320 | exit(1); \ |
| 321 | } while (0) |
| 322 | #define fnote(op_, fmt, ...) \ |
| 323 | printf("%s:%d: note: [%s] '%s': " fmt, asmfn, (op_)->asmln, g_func, \ |
| 324 | dump_op(op_), ##__VA_ARGS__) |
| 325 | |
| 326 | #define ferr_assert(op_, cond) do { \ |
| 327 | if (!(cond)) ferr(op_, "assertion '%s' failed\n", #cond); \ |
| 328 | } while (0) |
| 329 | |
| 330 | const char *regs_r32[] = { |
| 331 | "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp", |
| 332 | // not r32, but list here for easy parsing and printing |
| 333 | "mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7", |
| 334 | "st", "st(1)", "st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)" |
| 335 | }; |
| 336 | const char *regs_r16[] = { "ax", "bx", "cx", "dx", "si", "di", "bp", "sp" }; |
| 337 | const char *regs_r8l[] = { "al", "bl", "cl", "dl" }; |
| 338 | const char *regs_r8h[] = { "ah", "bh", "ch", "dh" }; |
| 339 | |
| 340 | enum x86_regs { |
| 341 | xUNSPEC = -1, |
| 342 | xAX, xBX, xCX, xDX, |
| 343 | xSI, xDI, xBP, xSP, |
| 344 | xMM0, xMM1, xMM2, xMM3, // mmx |
| 345 | xMM4, xMM5, xMM6, xMM7, |
| 346 | xST0, xST1, xST2, xST3, // x87 |
| 347 | xST4, xST5, xST6, xST7, |
| 348 | }; |
| 349 | |
| 350 | #define mxAX (1 << xAX) |
| 351 | #define mxCX (1 << xCX) |
| 352 | #define mxDX (1 << xDX) |
| 353 | #define mxST0 (1 << xST0) |
| 354 | #define mxST1 (1 << xST1) |
| 355 | #define mxST1_0 (mxST1 | mxST0) |
| 356 | #define mxST7_2 (0xfc << xST0) |
| 357 | #define mxSTa (0xff << xST0) |
| 358 | |
| 359 | // possible basic comparison types (without inversion) |
| 360 | enum parsed_flag_op { |
| 361 | PFO_O, // 0 OF=1 |
| 362 | PFO_C, // 2 CF=1 |
| 363 | PFO_Z, // 4 ZF=1 |
| 364 | PFO_BE, // 6 CF=1||ZF=1 |
| 365 | PFO_S, // 8 SF=1 |
| 366 | PFO_P, // a PF=1 |
| 367 | PFO_L, // c SF!=OF |
| 368 | PFO_LE, // e ZF=1||SF!=OF |
| 369 | }; |
| 370 | |
| 371 | #define PFOB_O (1 << PFO_O) |
| 372 | #define PFOB_C (1 << PFO_C) |
| 373 | #define PFOB_Z (1 << PFO_Z) |
| 374 | #define PFOB_S (1 << PFO_S) |
| 375 | |
| 376 | static const char *parsed_flag_op_names[] = { |
| 377 | "o", "c", "z", "be", "s", "p", "l", "le" |
| 378 | }; |
| 379 | |
| 380 | static int char_array_i(const char *array[], size_t len, const char *s) |
| 381 | { |
| 382 | int i; |
| 383 | |
| 384 | for (i = 0; i < len; i++) |
| 385 | if (IS(s, array[i])) |
| 386 | return i; |
| 387 | |
| 388 | return -1; |
| 389 | } |
| 390 | |
| 391 | static void printf_number(char *buf, size_t buf_size, |
| 392 | unsigned long number) |
| 393 | { |
| 394 | // output in C-friendly form |
| 395 | snprintf(buf, buf_size, number < 10 ? "%lu" : "0x%02lx", number); |
| 396 | } |
| 397 | |
| 398 | static int check_segment_prefix(const char *s) |
| 399 | { |
| 400 | if (s[0] == 0 || s[1] != 's' || s[2] != ':') |
| 401 | return 0; |
| 402 | |
| 403 | switch (s[0]) { |
| 404 | case 'c': return 1; |
| 405 | case 'd': return 2; |
| 406 | case 's': return 3; |
| 407 | case 'e': return 4; |
| 408 | case 'f': return 5; |
| 409 | case 'g': return 6; |
| 410 | default: return 0; |
| 411 | } |
| 412 | } |
| 413 | |
| 414 | static int parse_reg(enum opr_lenmod *reg_lmod, const char *s) |
| 415 | { |
| 416 | int reg; |
| 417 | |
| 418 | reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s); |
| 419 | if (reg >= 8) { |
| 420 | *reg_lmod = OPLM_QWORD; |
| 421 | return reg; |
| 422 | } |
| 423 | if (reg >= 0) { |
| 424 | *reg_lmod = OPLM_DWORD; |
| 425 | return reg; |
| 426 | } |
| 427 | reg = char_array_i(regs_r16, ARRAY_SIZE(regs_r16), s); |
| 428 | if (reg >= 0) { |
| 429 | *reg_lmod = OPLM_WORD; |
| 430 | return reg; |
| 431 | } |
| 432 | reg = char_array_i(regs_r8h, ARRAY_SIZE(regs_r8h), s); |
| 433 | if (reg >= 0) { |
| 434 | *reg_lmod = OPLM_BYTE; |
| 435 | return reg; |
| 436 | } |
| 437 | reg = char_array_i(regs_r8l, ARRAY_SIZE(regs_r8l), s); |
| 438 | if (reg >= 0) { |
| 439 | *reg_lmod = OPLM_BYTE; |
| 440 | return reg; |
| 441 | } |
| 442 | |
| 443 | return -1; |
| 444 | } |
| 445 | |
| 446 | static int parse_indmode(char *name, int *regmask, int need_c_cvt) |
| 447 | { |
| 448 | enum opr_lenmod lmod; |
| 449 | char cvtbuf[256]; |
| 450 | char *d = cvtbuf; |
| 451 | char *s = name; |
| 452 | char w[64]; |
| 453 | long number; |
| 454 | int reg; |
| 455 | int c = 0; |
| 456 | |
| 457 | *d = 0; |
| 458 | |
| 459 | while (*s != 0) { |
| 460 | d += strlen(d); |
| 461 | while (my_isblank(*s)) |
| 462 | s++; |
| 463 | for (; my_issep(*s); d++, s++) |
| 464 | *d = *s; |
| 465 | while (my_isblank(*s)) |
| 466 | s++; |
| 467 | *d = 0; |
| 468 | |
| 469 | // skip '?s:' prefixes |
| 470 | if (check_segment_prefix(s)) |
| 471 | s += 3; |
| 472 | |
| 473 | s = next_idt(w, sizeof(w), s); |
| 474 | if (w[0] == 0) |
| 475 | break; |
| 476 | c++; |
| 477 | |
| 478 | reg = parse_reg(&lmod, w); |
| 479 | if (reg >= 0) { |
| 480 | *regmask |= 1 << reg; |
| 481 | goto pass; |
| 482 | } |
| 483 | |
| 484 | if ('0' <= w[0] && w[0] <= '9') { |
| 485 | number = parse_number(w); |
| 486 | printf_number(d, sizeof(cvtbuf) - (d - cvtbuf), number); |
| 487 | continue; |
| 488 | } |
| 489 | |
| 490 | // probably some label/identifier - pass |
| 491 | |
| 492 | pass: |
| 493 | snprintf(d, sizeof(cvtbuf) - (d - cvtbuf), "%s", w); |
| 494 | } |
| 495 | |
| 496 | if (need_c_cvt) |
| 497 | strcpy(name, cvtbuf); |
| 498 | |
| 499 | return c; |
| 500 | } |
| 501 | |
| 502 | static int is_reg_in_str(const char *s) |
| 503 | { |
| 504 | int i; |
| 505 | |
| 506 | if (strlen(s) < 3 || (s[3] && !my_issep(s[3]) && !my_isblank(s[3]))) |
| 507 | return 0; |
| 508 | |
| 509 | for (i = 0; i < ARRAY_SIZE(regs_r32); i++) |
| 510 | if (!strncmp(s, regs_r32[i], 3)) |
| 511 | return 1; |
| 512 | |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | static const char *parse_stack_el(const char *name, char *extra_reg, |
| 517 | int *base_val, int early_try) |
| 518 | { |
| 519 | const char *p, *p2, *s; |
| 520 | char *endp = NULL; |
| 521 | char buf[32]; |
| 522 | long val = -1; |
| 523 | int len; |
| 524 | |
| 525 | if (g_bp_frame || early_try) |
| 526 | { |
| 527 | p = name; |
| 528 | if (IS_START(p + 3, "+ebp+") && is_reg_in_str(p)) { |
| 529 | p += 4; |
| 530 | if (extra_reg != NULL) { |
| 531 | strncpy(extra_reg, name, 3); |
| 532 | extra_reg[4] = 0; |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | if (IS_START(p, "ebp+")) { |
| 537 | p += 4; |
| 538 | |
| 539 | p2 = strchr(p, '+'); |
| 540 | if (p2 != NULL && is_reg_in_str(p)) { |
| 541 | if (extra_reg != NULL) { |
| 542 | strncpy(extra_reg, p, p2 - p); |
| 543 | extra_reg[p2 - p] = 0; |
| 544 | } |
| 545 | p = p2 + 1; |
| 546 | } |
| 547 | |
| 548 | if (!('0' <= *p && *p <= '9')) |
| 549 | return p; |
| 550 | |
| 551 | return NULL; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | if (!IS_START(name, "esp+")) |
| 556 | return NULL; |
| 557 | |
| 558 | s = name + 4; |
| 559 | p = strchr(s, '+'); |
| 560 | if (p) { |
| 561 | if (is_reg_in_str(s)) { |
| 562 | if (extra_reg != NULL) { |
| 563 | strncpy(extra_reg, s, p - s); |
| 564 | extra_reg[p - s] = 0; |
| 565 | } |
| 566 | s = p + 1; |
| 567 | p = strchr(s, '+'); |
| 568 | if (p == NULL) |
| 569 | aerr("%s IDA stackvar not set?\n", __func__); |
| 570 | } |
| 571 | if (!('0' <= *s && *s <= '9')) { |
| 572 | aerr("%s IDA stackvar offset not set?\n", __func__); |
| 573 | return NULL; |
| 574 | } |
| 575 | if (s[0] == '0' && s[1] == 'x') |
| 576 | s += 2; |
| 577 | len = p - s; |
| 578 | if (len < sizeof(buf) - 1) { |
| 579 | strncpy(buf, s, len); |
| 580 | buf[len] = 0; |
| 581 | val = strtol(buf, &endp, 16); |
| 582 | if (val == 0 || *endp != 0) { |
| 583 | aerr("%s num parse fail for '%s'\n", __func__, buf); |
| 584 | return NULL; |
| 585 | } |
| 586 | } |
| 587 | p++; |
| 588 | } |
| 589 | else |
| 590 | p = name + 4; |
| 591 | |
| 592 | if ('0' <= *p && *p <= '9') |
| 593 | return NULL; |
| 594 | |
| 595 | if (base_val != NULL) |
| 596 | *base_val = val; |
| 597 | return p; |
| 598 | } |
| 599 | |
| 600 | static int guess_lmod_from_name(struct parsed_opr *opr) |
| 601 | { |
| 602 | if (IS_START(opr->name, "dword_") || IS_START(opr->name, "off_")) { |
| 603 | opr->lmod = OPLM_DWORD; |
| 604 | return 1; |
| 605 | } |
| 606 | if (IS_START(opr->name, "word_")) { |
| 607 | opr->lmod = OPLM_WORD; |
| 608 | return 1; |
| 609 | } |
| 610 | if (IS_START(opr->name, "byte_")) { |
| 611 | opr->lmod = OPLM_BYTE; |
| 612 | return 1; |
| 613 | } |
| 614 | if (IS_START(opr->name, "qword_")) { |
| 615 | opr->lmod = OPLM_QWORD; |
| 616 | return 1; |
| 617 | } |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | static int guess_lmod_from_c_type(enum opr_lenmod *lmod, |
| 622 | const struct parsed_type *c_type) |
| 623 | { |
| 624 | static const char *qword_types[] = { |
| 625 | "uint64_t", "int64_t", "__int64", |
| 626 | }; |
| 627 | static const char *dword_types[] = { |
| 628 | "uint32_t", "int", "_DWORD", "UINT_PTR", "DWORD", |
| 629 | "WPARAM", "LPARAM", "UINT", "__int32", |
| 630 | "LONG", "HIMC", "BOOL", "size_t", |
| 631 | "float", |
| 632 | }; |
| 633 | static const char *word_types[] = { |
| 634 | "uint16_t", "int16_t", "_WORD", "WORD", |
| 635 | "unsigned __int16", "__int16", |
| 636 | }; |
| 637 | static const char *byte_types[] = { |
| 638 | "uint8_t", "int8_t", "char", |
| 639 | "unsigned __int8", "__int8", "BYTE", "_BYTE", |
| 640 | "CHAR", "_UNKNOWN", |
| 641 | // structures.. deal the same as with _UNKNOWN for now |
| 642 | "CRITICAL_SECTION", |
| 643 | }; |
| 644 | const char *n; |
| 645 | int i; |
| 646 | |
| 647 | if (c_type->is_ptr) { |
| 648 | *lmod = OPLM_DWORD; |
| 649 | return 1; |
| 650 | } |
| 651 | |
| 652 | n = skip_type_mod(c_type->name); |
| 653 | |
| 654 | for (i = 0; i < ARRAY_SIZE(dword_types); i++) { |
| 655 | if (IS(n, dword_types[i])) { |
| 656 | *lmod = OPLM_DWORD; |
| 657 | return 1; |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | for (i = 0; i < ARRAY_SIZE(word_types); i++) { |
| 662 | if (IS(n, word_types[i])) { |
| 663 | *lmod = OPLM_WORD; |
| 664 | return 1; |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | for (i = 0; i < ARRAY_SIZE(byte_types); i++) { |
| 669 | if (IS(n, byte_types[i])) { |
| 670 | *lmod = OPLM_BYTE; |
| 671 | return 1; |
| 672 | } |
| 673 | } |
| 674 | |
| 675 | for (i = 0; i < ARRAY_SIZE(qword_types); i++) { |
| 676 | if (IS(n, qword_types[i])) { |
| 677 | *lmod = OPLM_QWORD; |
| 678 | return 1; |
| 679 | } |
| 680 | } |
| 681 | |
| 682 | return 0; |
| 683 | } |
| 684 | |
| 685 | static char *default_cast_to(char *buf, size_t buf_size, |
| 686 | struct parsed_opr *opr) |
| 687 | { |
| 688 | buf[0] = 0; |
| 689 | |
| 690 | if (!opr->is_ptr || strchr(opr->name, '[')) |
| 691 | return buf; |
| 692 | if (opr->pp == NULL || opr->pp->type.name == NULL |
| 693 | || opr->pp->is_fptr) |
| 694 | { |
| 695 | snprintf(buf, buf_size, "%s", "(void *)"); |
| 696 | return buf; |
| 697 | } |
| 698 | |
| 699 | snprintf(buf, buf_size, "(%s)", opr->pp->type.name); |
| 700 | return buf; |
| 701 | } |
| 702 | |
| 703 | static enum opr_type lmod_from_directive(const char *d) |
| 704 | { |
| 705 | if (IS(d, "dd")) |
| 706 | return OPLM_DWORD; |
| 707 | else if (IS(d, "dw")) |
| 708 | return OPLM_WORD; |
| 709 | else if (IS(d, "db")) |
| 710 | return OPLM_BYTE; |
| 711 | |
| 712 | aerr("unhandled directive: '%s'\n", d); |
| 713 | return OPLM_UNSPEC; |
| 714 | } |
| 715 | |
| 716 | static void setup_reg_opr(struct parsed_opr *opr, int reg, enum opr_lenmod lmod, |
| 717 | int *regmask) |
| 718 | { |
| 719 | opr->type = OPT_REG; |
| 720 | opr->reg = reg; |
| 721 | opr->lmod = lmod; |
| 722 | *regmask |= 1 << reg; |
| 723 | } |
| 724 | |
| 725 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
| 726 | int *extra_offs); |
| 727 | |
| 728 | static int parse_operand(struct parsed_opr *opr, |
| 729 | int *regmask, int *regmask_indirect, |
| 730 | char words[16][256], int wordc, int w, unsigned int op_flags) |
| 731 | { |
| 732 | const struct parsed_proto *pp = NULL; |
| 733 | enum opr_lenmod tmplmod; |
| 734 | unsigned long number; |
| 735 | char buf[256]; |
| 736 | int ret, len; |
| 737 | int wordc_in; |
| 738 | char *p; |
| 739 | int i; |
| 740 | |
| 741 | if (w >= wordc) |
| 742 | aerr("parse_operand w %d, wordc %d\n", w, wordc); |
| 743 | |
| 744 | opr->reg = xUNSPEC; |
| 745 | |
| 746 | for (i = w; i < wordc; i++) { |
| 747 | len = strlen(words[i]); |
| 748 | if (words[i][len - 1] == ',') { |
| 749 | words[i][len - 1] = 0; |
| 750 | wordc = i + 1; |
| 751 | break; |
| 752 | } |
| 753 | } |
| 754 | |
| 755 | wordc_in = wordc - w; |
| 756 | |
| 757 | if ((op_flags & OPF_JMP) && wordc_in > 0 |
| 758 | && !('0' <= words[w][0] && words[w][0] <= '9')) |
| 759 | { |
| 760 | const char *label = NULL; |
| 761 | |
| 762 | if (wordc_in == 3 && !strncmp(words[w], "near", 4) |
| 763 | && IS(words[w + 1], "ptr")) |
| 764 | label = words[w + 2]; |
| 765 | else if (wordc_in == 2 && IS(words[w], "short")) |
| 766 | label = words[w + 1]; |
| 767 | else if (wordc_in == 1 |
| 768 | && strchr(words[w], '[') == NULL |
| 769 | && parse_reg(&tmplmod, words[w]) < 0) |
| 770 | label = words[w]; |
| 771 | |
| 772 | if (label != NULL) { |
| 773 | opr->type = OPT_LABEL; |
| 774 | ret = check_segment_prefix(label); |
| 775 | if (ret != 0) { |
| 776 | if (ret >= 5) |
| 777 | aerr("fs/gs used\n"); |
| 778 | opr->had_ds = 1; |
| 779 | label += 3; |
| 780 | } |
| 781 | strcpy(opr->name, label); |
| 782 | return wordc; |
| 783 | } |
| 784 | } |
| 785 | |
| 786 | if (wordc_in >= 3) { |
| 787 | if (IS(words[w + 1], "ptr")) { |
| 788 | if (IS(words[w], "dword")) |
| 789 | opr->lmod = OPLM_DWORD; |
| 790 | else if (IS(words[w], "word")) |
| 791 | opr->lmod = OPLM_WORD; |
| 792 | else if (IS(words[w], "byte")) |
| 793 | opr->lmod = OPLM_BYTE; |
| 794 | else if (IS(words[w], "qword")) |
| 795 | opr->lmod = OPLM_QWORD; |
| 796 | else |
| 797 | aerr("type parsing failed\n"); |
| 798 | w += 2; |
| 799 | wordc_in = wordc - w; |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | if (wordc_in == 2) { |
| 804 | if (IS(words[w], "offset")) { |
| 805 | opr->type = OPT_OFFSET; |
| 806 | opr->lmod = OPLM_DWORD; |
| 807 | strcpy(opr->name, words[w + 1]); |
| 808 | pp = proto_parse(g_fhdr, opr->name, 1); |
| 809 | goto do_label; |
| 810 | } |
| 811 | if (IS(words[w], "(offset")) { |
| 812 | p = strchr(words[w + 1], ')'); |
| 813 | if (p == NULL) |
| 814 | aerr("parse of bracketed offset failed\n"); |
| 815 | *p = 0; |
| 816 | opr->type = OPT_OFFSET; |
| 817 | strcpy(opr->name, words[w + 1]); |
| 818 | return wordc; |
| 819 | } |
| 820 | } |
| 821 | |
| 822 | if (wordc_in != 1) |
| 823 | aerr("parse_operand 1 word expected\n"); |
| 824 | |
| 825 | ret = check_segment_prefix(words[w]); |
| 826 | if (ret != 0) { |
| 827 | if (ret >= 5) |
| 828 | aerr("fs/gs used\n"); |
| 829 | opr->had_ds = 1; |
| 830 | memmove(words[w], words[w] + 3, strlen(words[w]) - 2); |
| 831 | } |
| 832 | strcpy(opr->name, words[w]); |
| 833 | |
| 834 | if (words[w][0] == '[') { |
| 835 | opr->type = OPT_REGMEM; |
| 836 | ret = sscanf(words[w], "[%[^]]]", opr->name); |
| 837 | if (ret != 1) |
| 838 | aerr("[] parse failure\n"); |
| 839 | |
| 840 | parse_indmode(opr->name, regmask_indirect, 1); |
| 841 | if (opr->lmod == OPLM_UNSPEC |
| 842 | && parse_stack_el(opr->name, NULL, NULL, 1)) |
| 843 | { |
| 844 | // might be an equ |
| 845 | struct parsed_equ *eq = |
| 846 | equ_find(NULL, parse_stack_el(opr->name, NULL, NULL, 1), &i); |
| 847 | if (eq) |
| 848 | opr->lmod = eq->lmod; |
| 849 | |
| 850 | // might be unaligned access |
| 851 | g_func_lmods |= 1 << OPLM_BYTE; |
| 852 | } |
| 853 | return wordc; |
| 854 | } |
| 855 | else if (strchr(words[w], '[')) { |
| 856 | // label[reg] form |
| 857 | p = strchr(words[w], '['); |
| 858 | opr->type = OPT_REGMEM; |
| 859 | parse_indmode(p, regmask_indirect, 0); |
| 860 | strncpy(buf, words[w], p - words[w]); |
| 861 | buf[p - words[w]] = 0; |
| 862 | pp = proto_parse(g_fhdr, buf, 1); |
| 863 | goto do_label; |
| 864 | } |
| 865 | else if (('0' <= words[w][0] && words[w][0] <= '9') |
| 866 | || words[w][0] == '-') |
| 867 | { |
| 868 | number = parse_number(words[w]); |
| 869 | opr->type = OPT_CONST; |
| 870 | opr->val = number; |
| 871 | printf_number(opr->name, sizeof(opr->name), number); |
| 872 | return wordc; |
| 873 | } |
| 874 | |
| 875 | ret = parse_reg(&tmplmod, opr->name); |
| 876 | if (ret >= 0) { |
| 877 | setup_reg_opr(opr, ret, tmplmod, regmask); |
| 878 | return wordc; |
| 879 | } |
| 880 | |
| 881 | // most likely var in data segment |
| 882 | opr->type = OPT_LABEL; |
| 883 | pp = proto_parse(g_fhdr, opr->name, g_quiet_pp); |
| 884 | |
| 885 | do_label: |
| 886 | if (pp != NULL) { |
| 887 | if (pp->is_fptr || pp->is_func) { |
| 888 | opr->lmod = OPLM_DWORD; |
| 889 | opr->is_ptr = 1; |
| 890 | } |
| 891 | else { |
| 892 | tmplmod = OPLM_UNSPEC; |
| 893 | if (!guess_lmod_from_c_type(&tmplmod, &pp->type)) |
| 894 | anote("unhandled C type '%s' for '%s'\n", |
| 895 | pp->type.name, opr->name); |
| 896 | |
| 897 | if (opr->lmod == OPLM_UNSPEC) { |
| 898 | opr->lmod = tmplmod; |
| 899 | opr->type_from_var = 1; |
| 900 | } |
| 901 | else if (opr->lmod != tmplmod) { |
| 902 | opr->size_mismatch = 1; |
| 903 | if (tmplmod < opr->lmod) |
| 904 | opr->size_lt = 1; |
| 905 | } |
| 906 | opr->is_ptr = pp->type.is_ptr; |
| 907 | } |
| 908 | opr->is_array = pp->type.is_array; |
| 909 | } |
| 910 | opr->pp = pp; |
| 911 | |
| 912 | if (opr->lmod == OPLM_UNSPEC) |
| 913 | guess_lmod_from_name(opr); |
| 914 | return wordc; |
| 915 | } |
| 916 | |
| 917 | static const struct { |
| 918 | const char *name; |
| 919 | unsigned int flags; |
| 920 | } pref_table[] = { |
| 921 | { "rep", OPF_REP }, |
| 922 | { "repe", OPF_REP|OPF_REPZ }, |
| 923 | { "repz", OPF_REP|OPF_REPZ }, |
| 924 | { "repne", OPF_REP|OPF_REPNZ }, |
| 925 | { "repnz", OPF_REP|OPF_REPNZ }, |
| 926 | { "lock", OPF_LOCK }, // ignored for now.. |
| 927 | }; |
| 928 | |
| 929 | #define OPF_CJMP_CC (OPF_JMP|OPF_CJMP|OPF_CC) |
| 930 | |
| 931 | static const struct { |
| 932 | const char *name; |
| 933 | enum op_op op; |
| 934 | unsigned short minopr; |
| 935 | unsigned short maxopr; |
| 936 | unsigned int flags; |
| 937 | unsigned char pfo; |
| 938 | unsigned char pfo_inv; |
| 939 | } op_table[] = { |
| 940 | { "nop", OP_NOP, 0, 0, 0 }, |
| 941 | { "push", OP_PUSH, 1, 1, 0 }, |
| 942 | { "pop", OP_POP, 1, 1, OPF_DATA }, |
| 943 | { "pusha",OP_PUSHA, 0, 0, 0 }, |
| 944 | { "popa", OP_POPA, 0, 0, OPF_DATA }, |
| 945 | { "leave",OP_LEAVE, 0, 0, OPF_DATA }, |
| 946 | { "mov" , OP_MOV, 2, 2, OPF_DATA }, |
| 947 | { "lea", OP_LEA, 2, 2, OPF_DATA }, |
| 948 | { "movzx",OP_MOVZX, 2, 2, OPF_DATA }, |
| 949 | { "movsx",OP_MOVSX, 2, 2, OPF_DATA }, |
| 950 | { "xchg", OP_XCHG, 2, 2, OPF_DATA }, |
| 951 | { "not", OP_NOT, 1, 1, OPF_DATA }, |
| 952 | { "xlat", OP_XLAT, 0, 0, OPF_DATA }, |
| 953 | { "cdq", OP_CDQ, 0, 0, OPF_DATA }, |
| 954 | { "bswap",OP_BSWAP, 1, 1, OPF_DATA }, |
| 955 | { "lodsb",OP_LODS, 0, 0, OPF_DATA }, |
| 956 | { "lodsw",OP_LODS, 0, 0, OPF_DATA }, |
| 957 | { "lodsd",OP_LODS, 0, 0, OPF_DATA }, |
| 958 | { "stosb",OP_STOS, 0, 0, OPF_DATA }, |
| 959 | { "stosw",OP_STOS, 0, 0, OPF_DATA }, |
| 960 | { "stosd",OP_STOS, 0, 0, OPF_DATA }, |
| 961 | { "movsb",OP_MOVS, 0, 0, OPF_DATA }, |
| 962 | { "movsw",OP_MOVS, 0, 0, OPF_DATA }, |
| 963 | { "movsd",OP_MOVS, 0, 0, OPF_DATA }, |
| 964 | { "cmpsb",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
| 965 | { "cmpsw",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
| 966 | { "cmpsd",OP_CMPS, 0, 0, OPF_DATA|OPF_FLAGS }, |
| 967 | { "scasb",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
| 968 | { "scasw",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
| 969 | { "scasd",OP_SCAS, 0, 0, OPF_DATA|OPF_FLAGS }, |
| 970 | { "std", OP_STD, 0, 0, OPF_DATA }, // special flag |
| 971 | { "cld", OP_CLD, 0, 0, OPF_DATA }, |
| 972 | { "add", OP_ADD, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 973 | { "sub", OP_SUB, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 974 | { "and", OP_AND, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 975 | { "or", OP_OR, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 976 | { "xor", OP_XOR, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 977 | { "shl", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 978 | { "shr", OP_SHR, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 979 | { "sal", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 980 | { "sar", OP_SAR, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 981 | { "shld", OP_SHLD, 3, 3, OPF_DATA|OPF_FLAGS }, |
| 982 | { "shrd", OP_SHRD, 3, 3, OPF_DATA|OPF_FLAGS }, |
| 983 | { "rol", OP_ROL, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 984 | { "ror", OP_ROR, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 985 | { "rcl", OP_RCL, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
| 986 | { "rcr", OP_RCR, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
| 987 | { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
| 988 | { "sbb", OP_SBB, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C }, |
| 989 | { "bsf", OP_BSF, 2, 2, OPF_DATA|OPF_FLAGS }, |
| 990 | { "inc", OP_INC, 1, 1, OPF_DATA|OPF_FLAGS }, |
| 991 | { "dec", OP_DEC, 1, 1, OPF_DATA|OPF_FLAGS }, |
| 992 | { "neg", OP_NEG, 1, 1, OPF_DATA|OPF_FLAGS }, |
| 993 | { "mul", OP_MUL, 1, 1, OPF_DATA|OPF_FLAGS }, |
| 994 | { "imul", OP_IMUL, 1, 3, OPF_DATA|OPF_FLAGS }, |
| 995 | { "div", OP_DIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
| 996 | { "idiv", OP_IDIV, 1, 1, OPF_DATA|OPF_FLAGS }, |
| 997 | { "test", OP_TEST, 2, 2, OPF_FLAGS }, |
| 998 | { "cmp", OP_CMP, 2, 2, OPF_FLAGS }, |
| 999 | { "retn", OP_RET, 0, 1, OPF_TAIL }, |
| 1000 | { "call", OP_CALL, 1, 1, OPF_JMP|OPF_DATA|OPF_FLAGS }, |
| 1001 | { "jmp", OP_JMP, 1, 1, OPF_JMP }, |
| 1002 | { "jecxz",OP_JECXZ, 1, 1, OPF_JMP|OPF_CJMP }, |
| 1003 | { "loop", OP_LOOP, 1, 1, OPF_JMP|OPF_CJMP|OPF_DATA }, |
| 1004 | { "jo", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_O, 0 }, // 70 OF=1 |
| 1005 | { "jno", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_O, 1 }, // 71 OF=0 |
| 1006 | { "jc", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 0 }, // 72 CF=1 |
| 1007 | { "jb", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 0 }, // 72 |
| 1008 | { "jnc", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 CF=0 |
| 1009 | { "jnb", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 |
| 1010 | { "jae", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 |
| 1011 | { "jz", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 0 }, // 74 ZF=1 |
| 1012 | { "je", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 0 }, // 74 |
| 1013 | { "jnz", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 1 }, // 75 ZF=0 |
| 1014 | { "jne", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 1 }, // 75 |
| 1015 | { "jbe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 0 }, // 76 CF=1||ZF=1 |
| 1016 | { "jna", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 0 }, // 76 |
| 1017 | { "ja", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 1 }, // 77 CF=0&&ZF=0 |
| 1018 | { "jnbe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 1 }, // 77 |
| 1019 | { "js", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_S, 0 }, // 78 SF=1 |
| 1020 | { "jns", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_S, 1 }, // 79 SF=0 |
| 1021 | { "jp", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 0 }, // 7a PF=1 |
| 1022 | { "jpe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 0 }, // 7a |
| 1023 | { "jnp", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 1 }, // 7b PF=0 |
| 1024 | { "jpo", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 1 }, // 7b |
| 1025 | { "jl", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 0 }, // 7c SF!=OF |
| 1026 | { "jnge", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 0 }, // 7c |
| 1027 | { "jge", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 1 }, // 7d SF=OF |
| 1028 | { "jnl", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 1 }, // 7d |
| 1029 | { "jle", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 0 }, // 7e ZF=1||SF!=OF |
| 1030 | { "jng", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 0 }, // 7e |
| 1031 | { "jg", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 1 }, // 7f ZF=0&&SF=OF |
| 1032 | { "jnle", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 1 }, // 7f |
| 1033 | { "seto", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_O, 0 }, |
| 1034 | { "setno", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_O, 1 }, |
| 1035 | { "setc", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 0 }, |
| 1036 | { "setb", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 0 }, |
| 1037 | { "setnc", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
| 1038 | { "setae", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
| 1039 | { "setnb", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 }, |
| 1040 | { "setz", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 0 }, |
| 1041 | { "sete", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 0 }, |
| 1042 | { "setnz", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 1 }, |
| 1043 | { "setne", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 1 }, |
| 1044 | { "setbe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 0 }, |
| 1045 | { "setna", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 0 }, |
| 1046 | { "seta", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 1 }, |
| 1047 | { "setnbe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 1 }, |
| 1048 | { "sets", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_S, 0 }, |
| 1049 | { "setns", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_S, 1 }, |
| 1050 | { "setp", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 0 }, |
| 1051 | { "setpe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 0 }, |
| 1052 | { "setnp", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 1 }, |
| 1053 | { "setpo", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 1 }, |
| 1054 | { "setl", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 0 }, |
| 1055 | { "setnge", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 0 }, |
| 1056 | { "setge", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 1 }, |
| 1057 | { "setnl", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 1 }, |
| 1058 | { "setle", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 0 }, |
| 1059 | { "setng", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 0 }, |
| 1060 | { "setg", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 }, |
| 1061 | { "setnle", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 }, |
| 1062 | // x87 |
| 1063 | { "fld", OP_FLD, 1, 1, OPF_FPUSH }, |
| 1064 | { "fild", OP_FILD, 1, 1, OPF_FPUSH }, |
| 1065 | { "fld1", OP_FLDc, 0, 0, OPF_FPUSH }, |
| 1066 | { "fldln2", OP_FLDc, 0, 0, OPF_FPUSH }, |
| 1067 | { "fldz", OP_FLDc, 0, 0, OPF_FPUSH }, |
| 1068 | { "fst", OP_FST, 1, 1, 0 }, |
| 1069 | { "fstp", OP_FST, 1, 1, OPF_FPOP }, |
| 1070 | { "fist", OP_FIST, 1, 1, 0 }, |
| 1071 | { "fistp", OP_FIST, 1, 1, OPF_FPOP }, |
| 1072 | { "fadd", OP_FADD, 0, 2, 0 }, |
| 1073 | { "faddp", OP_FADD, 0, 2, OPF_FPOP }, |
| 1074 | { "fdiv", OP_FDIV, 0, 2, 0 }, |
| 1075 | { "fdivp", OP_FDIV, 0, 2, OPF_FPOP }, |
| 1076 | { "fmul", OP_FMUL, 0, 2, 0 }, |
| 1077 | { "fmulp", OP_FMUL, 0, 2, OPF_FPOP }, |
| 1078 | { "fsub", OP_FSUB, 0, 2, 0 }, |
| 1079 | { "fsubp", OP_FSUB, 0, 2, OPF_FPOP }, |
| 1080 | { "fdivr", OP_FDIVR, 0, 2, 0 }, |
| 1081 | { "fdivrp", OP_FDIVR, 0, 2, OPF_FPOP }, |
| 1082 | { "fsubr", OP_FSUBR, 0, 2, 0 }, |
| 1083 | { "fsubrp", OP_FSUBR, 0, 2, OPF_FPOP }, |
| 1084 | { "fiadd", OP_FIADD, 1, 1, 0 }, |
| 1085 | { "fidiv", OP_FIDIV, 1, 1, 0 }, |
| 1086 | { "fimul", OP_FIMUL, 1, 1, 0 }, |
| 1087 | { "fisub", OP_FISUB, 1, 1, 0 }, |
| 1088 | { "fidivr", OP_FIDIVR, 1, 1, 0 }, |
| 1089 | { "fisubr", OP_FISUBR, 1, 1, 0 }, |
| 1090 | { "fcom", OP_FCOM, 0, 1, 0 }, |
| 1091 | { "fcomp", OP_FCOM, 0, 1, OPF_FPOP }, |
| 1092 | { "fnstsw", OP_FNSTSW, 1, 1, OPF_DATA }, |
| 1093 | { "fchs", OP_FCHS, 0, 0, 0 }, |
| 1094 | { "fcos", OP_FCOS, 0, 0, 0 }, |
| 1095 | { "fpatan", OP_FPATAN, 0, 0, OPF_FPOP }, |
| 1096 | { "fptan", OP_FPTAN, 0, 0, OPF_FPUSH }, |
| 1097 | { "fsin", OP_FSIN, 0, 0, 0 }, |
| 1098 | { "fsqrt", OP_FSQRT, 0, 0, 0 }, |
| 1099 | { "fxch", OP_FXCH, 1, 1, 0 }, |
| 1100 | { "fyl2x", OP_FYL2X, 0, 0, OPF_FPOP }, |
| 1101 | // mmx |
| 1102 | { "emms", OP_EMMS, 0, 0, OPF_DATA }, |
| 1103 | { "movq", OP_MOV, 2, 2, OPF_DATA }, |
| 1104 | // pseudo-ops for lib calls |
| 1105 | { "_allshl",OPP_ALLSHL }, |
| 1106 | { "_allshr",OPP_ALLSHR }, |
| 1107 | { "_ftol", OPP_FTOL }, |
| 1108 | { "_CIpow", OPP_CIPOW }, |
| 1109 | // must be last |
| 1110 | { "ud2", OP_UD2 }, |
| 1111 | }; |
| 1112 | |
| 1113 | static void parse_op(struct parsed_op *op, char words[16][256], int wordc) |
| 1114 | { |
| 1115 | enum opr_lenmod lmod = OPLM_UNSPEC; |
| 1116 | int prefix_flags = 0; |
| 1117 | int regmask_ind; |
| 1118 | int regmask; |
| 1119 | int op_w = 0; |
| 1120 | int opr = 0; |
| 1121 | int w = 0; |
| 1122 | int i, j; |
| 1123 | |
| 1124 | for (i = 0; i < ARRAY_SIZE(pref_table); i++) { |
| 1125 | if (IS(words[w], pref_table[i].name)) { |
| 1126 | prefix_flags = pref_table[i].flags; |
| 1127 | break; |
| 1128 | } |
| 1129 | } |
| 1130 | |
| 1131 | if (prefix_flags) { |
| 1132 | if (wordc <= 1) |
| 1133 | aerr("lone prefix: '%s'\n", words[0]); |
| 1134 | w++; |
| 1135 | } |
| 1136 | |
| 1137 | op_w = w; |
| 1138 | for (i = 0; i < ARRAY_SIZE(op_table); i++) { |
| 1139 | if (IS(words[w], op_table[i].name)) |
| 1140 | break; |
| 1141 | } |
| 1142 | |
| 1143 | if (i == ARRAY_SIZE(op_table)) { |
| 1144 | if (!g_skip_func) |
| 1145 | aerr("unhandled op: '%s'\n", words[0]); |
| 1146 | i--; // OP_UD2 |
| 1147 | } |
| 1148 | w++; |
| 1149 | |
| 1150 | op->op = op_table[i].op; |
| 1151 | op->flags = op_table[i].flags | prefix_flags; |
| 1152 | op->pfo = op_table[i].pfo; |
| 1153 | op->pfo_inv = op_table[i].pfo_inv; |
| 1154 | op->regmask_src = op->regmask_dst = 0; |
| 1155 | op->asmln = asmln; |
| 1156 | |
| 1157 | if (op->op == OP_UD2) |
| 1158 | return; |
| 1159 | |
| 1160 | for (opr = 0; opr < op_table[i].maxopr; opr++) { |
| 1161 | if (opr >= op_table[i].minopr && w >= wordc) |
| 1162 | break; |
| 1163 | |
| 1164 | regmask = regmask_ind = 0; |
| 1165 | w = parse_operand(&op->operand[opr], ®mask, ®mask_ind, |
| 1166 | words, wordc, w, op->flags); |
| 1167 | |
| 1168 | if (opr == 0 && (op->flags & OPF_DATA)) |
| 1169 | op->regmask_dst = regmask; |
| 1170 | else |
| 1171 | op->regmask_src |= regmask; |
| 1172 | op->regmask_src |= regmask_ind; |
| 1173 | |
| 1174 | if (op->operand[opr].lmod != OPLM_UNSPEC) |
| 1175 | g_func_lmods |= 1 << op->operand[opr].lmod; |
| 1176 | } |
| 1177 | |
| 1178 | if (w < wordc) |
| 1179 | aerr("parse_op %s incomplete: %d/%d\n", |
| 1180 | words[0], w, wordc); |
| 1181 | |
| 1182 | // special cases |
| 1183 | op->operand_cnt = opr; |
| 1184 | if (!strncmp(op_table[i].name, "set", 3)) |
| 1185 | op->operand[0].lmod = OPLM_BYTE; |
| 1186 | |
| 1187 | switch (op->op) { |
| 1188 | // first operand is not dst |
| 1189 | case OP_CMP: |
| 1190 | case OP_TEST: |
| 1191 | op->regmask_src |= op->regmask_dst; |
| 1192 | op->regmask_dst = 0; |
| 1193 | break; |
| 1194 | |
| 1195 | // first operand is src too |
| 1196 | case OP_NOT: |
| 1197 | case OP_ADD: |
| 1198 | case OP_AND: |
| 1199 | case OP_OR: |
| 1200 | case OP_RCL: |
| 1201 | case OP_RCR: |
| 1202 | case OP_ADC: |
| 1203 | case OP_INC: |
| 1204 | case OP_DEC: |
| 1205 | case OP_NEG: |
| 1206 | case OP_BSWAP: |
| 1207 | // more below.. |
| 1208 | op->regmask_src |= op->regmask_dst; |
| 1209 | break; |
| 1210 | |
| 1211 | // special |
| 1212 | case OP_XCHG: |
| 1213 | op->regmask_src |= op->regmask_dst; |
| 1214 | op->regmask_dst |= op->regmask_src; |
| 1215 | goto check_align; |
| 1216 | |
| 1217 | case OP_SUB: |
| 1218 | case OP_SBB: |
| 1219 | case OP_XOR: |
| 1220 | if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG |
| 1221 | && op->operand[0].lmod == op->operand[1].lmod |
| 1222 | && op->operand[0].reg == op->operand[1].reg |
| 1223 | && IS(op->operand[0].name, op->operand[1].name)) // ! ah, al.. |
| 1224 | { |
| 1225 | op->regmask_src = 0; |
| 1226 | } |
| 1227 | else |
| 1228 | op->regmask_src |= op->regmask_dst; |
| 1229 | break; |
| 1230 | |
| 1231 | // ops with implicit argumets |
| 1232 | case OP_XLAT: |
| 1233 | op->operand_cnt = 2; |
| 1234 | setup_reg_opr(&op->operand[0], xAX, OPLM_BYTE, &op->regmask_src); |
| 1235 | op->regmask_dst = op->regmask_src; |
| 1236 | setup_reg_opr(&op->operand[1], xBX, OPLM_DWORD, &op->regmask_src); |
| 1237 | break; |
| 1238 | |
| 1239 | case OP_CDQ: |
| 1240 | op->operand_cnt = 2; |
| 1241 | setup_reg_opr(&op->operand[0], xDX, OPLM_DWORD, &op->regmask_dst); |
| 1242 | setup_reg_opr(&op->operand[1], xAX, OPLM_DWORD, &op->regmask_src); |
| 1243 | break; |
| 1244 | |
| 1245 | case OP_LODS: |
| 1246 | case OP_STOS: |
| 1247 | case OP_SCAS: |
| 1248 | if (words[op_w][4] == 'b') |
| 1249 | lmod = OPLM_BYTE; |
| 1250 | else if (words[op_w][4] == 'w') |
| 1251 | lmod = OPLM_WORD; |
| 1252 | else if (words[op_w][4] == 'd') |
| 1253 | lmod = OPLM_DWORD; |
| 1254 | j = 0; |
| 1255 | op->regmask_src = 0; |
| 1256 | setup_reg_opr(&op->operand[j++], op->op == OP_LODS ? xSI : xDI, |
| 1257 | OPLM_DWORD, &op->regmask_src); |
| 1258 | op->regmask_dst = op->regmask_src; |
| 1259 | setup_reg_opr(&op->operand[j++], xAX, lmod, |
| 1260 | op->op == OP_LODS ? &op->regmask_dst : &op->regmask_src); |
| 1261 | if (op->flags & OPF_REP) { |
| 1262 | setup_reg_opr(&op->operand[j++], xCX, OPLM_DWORD, &op->regmask_src); |
| 1263 | op->regmask_dst |= 1 << xCX; |
| 1264 | } |
| 1265 | op->operand_cnt = j; |
| 1266 | break; |
| 1267 | |
| 1268 | case OP_MOVS: |
| 1269 | case OP_CMPS: |
| 1270 | if (words[op_w][4] == 'b') |
| 1271 | lmod = OPLM_BYTE; |
| 1272 | else if (words[op_w][4] == 'w') |
| 1273 | lmod = OPLM_WORD; |
| 1274 | else if (words[op_w][4] == 'd') |
| 1275 | lmod = OPLM_DWORD; |
| 1276 | j = 0; |
| 1277 | op->regmask_src = 0; |
| 1278 | // note: lmod is not correct, don't have where to place it |
| 1279 | setup_reg_opr(&op->operand[j++], xDI, lmod, &op->regmask_src); |
| 1280 | setup_reg_opr(&op->operand[j++], xSI, OPLM_DWORD, &op->regmask_src); |
| 1281 | if (op->flags & OPF_REP) |
| 1282 | setup_reg_opr(&op->operand[j++], xCX, OPLM_DWORD, &op->regmask_src); |
| 1283 | op->operand_cnt = j; |
| 1284 | op->regmask_dst = op->regmask_src; |
| 1285 | break; |
| 1286 | |
| 1287 | case OP_LOOP: |
| 1288 | op->regmask_dst = 1 << xCX; |
| 1289 | // fallthrough |
| 1290 | case OP_JECXZ: |
| 1291 | op->operand_cnt = 2; |
| 1292 | op->regmask_src = 1 << xCX; |
| 1293 | op->operand[1].type = OPT_REG; |
| 1294 | op->operand[1].reg = xCX; |
| 1295 | op->operand[1].lmod = OPLM_DWORD; |
| 1296 | break; |
| 1297 | |
| 1298 | case OP_IMUL: |
| 1299 | if (op->operand_cnt == 2) { |
| 1300 | if (op->operand[0].type != OPT_REG) |
| 1301 | aerr("reg expected\n"); |
| 1302 | op->regmask_src |= 1 << op->operand[0].reg; |
| 1303 | } |
| 1304 | if (op->operand_cnt != 1) |
| 1305 | break; |
| 1306 | // fallthrough |
| 1307 | case OP_MUL: |
| 1308 | // singleop mul |
| 1309 | op->regmask_src |= op->regmask_dst; |
| 1310 | op->regmask_dst = (1 << xDX) | (1 << xAX); |
| 1311 | if (op->operand[0].lmod == OPLM_UNSPEC) |
| 1312 | op->operand[0].lmod = OPLM_DWORD; |
| 1313 | break; |
| 1314 | |
| 1315 | case OP_DIV: |
| 1316 | case OP_IDIV: |
| 1317 | // we could set up operands for edx:eax, but there is no real need to |
| 1318 | // (see is_opr_modified()) |
| 1319 | op->regmask_src |= op->regmask_dst; |
| 1320 | op->regmask_dst = (1 << xDX) | (1 << xAX); |
| 1321 | if (op->operand[0].lmod == OPLM_UNSPEC) |
| 1322 | op->operand[0].lmod = OPLM_DWORD; |
| 1323 | break; |
| 1324 | |
| 1325 | case OP_SHL: |
| 1326 | case OP_SHR: |
| 1327 | case OP_SAR: |
| 1328 | case OP_ROL: |
| 1329 | case OP_ROR: |
| 1330 | op->regmask_src |= op->regmask_dst; |
| 1331 | if (op->operand[1].lmod == OPLM_UNSPEC) |
| 1332 | op->operand[1].lmod = OPLM_BYTE; |
| 1333 | break; |
| 1334 | |
| 1335 | case OP_SHLD: |
| 1336 | case OP_SHRD: |
| 1337 | op->regmask_src |= op->regmask_dst; |
| 1338 | if (op->operand[2].lmod == OPLM_UNSPEC) |
| 1339 | op->operand[2].lmod = OPLM_BYTE; |
| 1340 | break; |
| 1341 | |
| 1342 | case OP_PUSH: |
| 1343 | op->regmask_src |= op->regmask_dst; |
| 1344 | op->regmask_dst = 0; |
| 1345 | if (op->operand[0].lmod == OPLM_UNSPEC |
| 1346 | && (op->operand[0].type == OPT_CONST |
| 1347 | || op->operand[0].type == OPT_OFFSET |
| 1348 | || op->operand[0].type == OPT_LABEL)) |
| 1349 | op->operand[0].lmod = OPLM_DWORD; |
| 1350 | break; |
| 1351 | |
| 1352 | // alignment |
| 1353 | case OP_MOV: |
| 1354 | check_align: |
| 1355 | if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG |
| 1356 | && op->operand[0].lmod == op->operand[1].lmod |
| 1357 | && op->operand[0].reg == op->operand[1].reg |
| 1358 | && IS(op->operand[0].name, op->operand[1].name)) // ! ah, al.. |
| 1359 | { |
| 1360 | op->flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 1361 | op->regmask_src = op->regmask_dst = 0; |
| 1362 | } |
| 1363 | break; |
| 1364 | |
| 1365 | case OP_LEA: |
| 1366 | if (op->operand[0].type == OPT_REG |
| 1367 | && op->operand[1].type == OPT_REGMEM) |
| 1368 | { |
| 1369 | char buf[16]; |
| 1370 | snprintf(buf, sizeof(buf), "%s+0", op->operand[0].name); |
| 1371 | if (IS(buf, op->operand[1].name)) |
| 1372 | op->flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 1373 | } |
| 1374 | break; |
| 1375 | |
| 1376 | case OP_CALL: |
| 1377 | // trashed regs must be explicitly detected later |
| 1378 | op->regmask_dst = 0; |
| 1379 | break; |
| 1380 | |
| 1381 | case OP_LEAVE: |
| 1382 | op->regmask_dst = (1 << xBP) | (1 << xSP); |
| 1383 | op->regmask_src = 1 << xBP; |
| 1384 | break; |
| 1385 | |
| 1386 | case OP_FLD: |
| 1387 | case OP_FILD: |
| 1388 | op->regmask_dst |= mxST0; |
| 1389 | break; |
| 1390 | |
| 1391 | case OP_FLDc: |
| 1392 | op->regmask_dst |= mxST0; |
| 1393 | if (IS(words[op_w] + 3, "1")) |
| 1394 | op->operand[0].val = X87_CONST_1; |
| 1395 | else if (IS(words[op_w] + 3, "ln2")) |
| 1396 | op->operand[0].val = X87_CONST_LN2; |
| 1397 | else if (IS(words[op_w] + 3, "z")) |
| 1398 | op->operand[0].val = X87_CONST_Z; |
| 1399 | else |
| 1400 | aerr("TODO\n"); |
| 1401 | break; |
| 1402 | |
| 1403 | case OP_FST: |
| 1404 | case OP_FIST: |
| 1405 | op->regmask_src |= mxST0; |
| 1406 | break; |
| 1407 | |
| 1408 | case OP_FADD: |
| 1409 | case OP_FDIV: |
| 1410 | case OP_FMUL: |
| 1411 | case OP_FSUB: |
| 1412 | case OP_FDIVR: |
| 1413 | case OP_FSUBR: |
| 1414 | op->regmask_src |= mxST0; |
| 1415 | if (op->operand_cnt == 2) |
| 1416 | op->regmask_src |= op->regmask_dst; |
| 1417 | else if (op->operand_cnt == 1) { |
| 1418 | memcpy(&op->operand[1], &op->operand[0], sizeof(op->operand[1])); |
| 1419 | op->operand[0].type = OPT_REG; |
| 1420 | op->operand[0].lmod = OPLM_QWORD; |
| 1421 | op->operand[0].reg = xST0; |
| 1422 | op->regmask_dst |= mxST0; |
| 1423 | } |
| 1424 | else |
| 1425 | // IDA doesn't use this |
| 1426 | aerr("no operands?\n"); |
| 1427 | break; |
| 1428 | |
| 1429 | case OP_FIADD: |
| 1430 | case OP_FIDIV: |
| 1431 | case OP_FIMUL: |
| 1432 | case OP_FISUB: |
| 1433 | case OP_FIDIVR: |
| 1434 | case OP_FISUBR: |
| 1435 | case OP_FCHS: |
| 1436 | case OP_FCOS: |
| 1437 | case OP_FSIN: |
| 1438 | case OP_FSQRT: |
| 1439 | case OP_FXCH: |
| 1440 | op->regmask_src |= mxST0; |
| 1441 | op->regmask_dst |= mxST0; |
| 1442 | break; |
| 1443 | |
| 1444 | case OP_FPATAN: |
| 1445 | case OP_FYL2X: |
| 1446 | op->regmask_src |= mxST0 | mxST1; |
| 1447 | op->regmask_dst |= mxST0; |
| 1448 | break; |
| 1449 | |
| 1450 | case OP_FPTAN: |
| 1451 | aerr("TODO\n"); |
| 1452 | break; |
| 1453 | |
| 1454 | case OP_FCOM: |
| 1455 | op->regmask_src |= mxST0; |
| 1456 | break; |
| 1457 | |
| 1458 | default: |
| 1459 | break; |
| 1460 | } |
| 1461 | |
| 1462 | if (op->operand[0].type == OPT_REG |
| 1463 | && op->operand[1].type == OPT_CONST) |
| 1464 | { |
| 1465 | struct parsed_opr *op1 = &op->operand[1]; |
| 1466 | if ((op->op == OP_AND && op1->val == 0) |
| 1467 | || (op->op == OP_OR |
| 1468 | && (op1->val == ~0 |
| 1469 | || (op->operand[0].lmod == OPLM_WORD && op1->val == 0xffff) |
| 1470 | || (op->operand[0].lmod == OPLM_BYTE && op1->val == 0xff)))) |
| 1471 | { |
| 1472 | op->regmask_src = 0; |
| 1473 | } |
| 1474 | } |
| 1475 | } |
| 1476 | |
| 1477 | static const char *op_name(struct parsed_op *po) |
| 1478 | { |
| 1479 | static char buf[16]; |
| 1480 | char *p; |
| 1481 | int i; |
| 1482 | |
| 1483 | if (po->op == OP_JCC || po->op == OP_SCC) { |
| 1484 | p = buf; |
| 1485 | *p++ = (po->op == OP_JCC) ? 'j' : 's'; |
| 1486 | if (po->pfo_inv) |
| 1487 | *p++ = 'n'; |
| 1488 | strcpy(p, parsed_flag_op_names[po->pfo]); |
| 1489 | return buf; |
| 1490 | } |
| 1491 | |
| 1492 | for (i = 0; i < ARRAY_SIZE(op_table); i++) |
| 1493 | if (op_table[i].op == po->op) |
| 1494 | return op_table[i].name; |
| 1495 | |
| 1496 | return "???"; |
| 1497 | } |
| 1498 | |
| 1499 | // debug |
| 1500 | static const char *dump_op(struct parsed_op *po) |
| 1501 | { |
| 1502 | static char out[128]; |
| 1503 | char *p = out; |
| 1504 | int i; |
| 1505 | |
| 1506 | if (po == NULL) |
| 1507 | return "???"; |
| 1508 | |
| 1509 | snprintf(out, sizeof(out), "%s", op_name(po)); |
| 1510 | for (i = 0; i < po->operand_cnt; i++) { |
| 1511 | p += strlen(p); |
| 1512 | if (i > 0) |
| 1513 | *p++ = ','; |
| 1514 | snprintf(p, sizeof(out) - (p - out), |
| 1515 | po->operand[i].type == OPT_REGMEM ? " [%s]" : " %s", |
| 1516 | po->operand[i].name); |
| 1517 | } |
| 1518 | |
| 1519 | return out; |
| 1520 | } |
| 1521 | |
| 1522 | static const char *lmod_type_u(struct parsed_op *po, |
| 1523 | enum opr_lenmod lmod) |
| 1524 | { |
| 1525 | switch (lmod) { |
| 1526 | case OPLM_QWORD: |
| 1527 | return "u64"; |
| 1528 | case OPLM_DWORD: |
| 1529 | return "u32"; |
| 1530 | case OPLM_WORD: |
| 1531 | return "u16"; |
| 1532 | case OPLM_BYTE: |
| 1533 | return "u8"; |
| 1534 | default: |
| 1535 | ferr(po, "invalid lmod: %d\n", lmod); |
| 1536 | return "(_invalid_)"; |
| 1537 | } |
| 1538 | } |
| 1539 | |
| 1540 | static const char *lmod_cast_u(struct parsed_op *po, |
| 1541 | enum opr_lenmod lmod) |
| 1542 | { |
| 1543 | switch (lmod) { |
| 1544 | case OPLM_QWORD: |
| 1545 | return ""; |
| 1546 | case OPLM_DWORD: |
| 1547 | return ""; |
| 1548 | case OPLM_WORD: |
| 1549 | return "(u16)"; |
| 1550 | case OPLM_BYTE: |
| 1551 | return "(u8)"; |
| 1552 | default: |
| 1553 | ferr(po, "invalid lmod: %d\n", lmod); |
| 1554 | return "(_invalid_)"; |
| 1555 | } |
| 1556 | } |
| 1557 | |
| 1558 | static const char *lmod_cast_u_ptr(struct parsed_op *po, |
| 1559 | enum opr_lenmod lmod) |
| 1560 | { |
| 1561 | switch (lmod) { |
| 1562 | case OPLM_QWORD: |
| 1563 | return "*(u64 *)"; |
| 1564 | case OPLM_DWORD: |
| 1565 | return "*(u32 *)"; |
| 1566 | case OPLM_WORD: |
| 1567 | return "*(u16 *)"; |
| 1568 | case OPLM_BYTE: |
| 1569 | return "*(u8 *)"; |
| 1570 | default: |
| 1571 | ferr(po, "invalid lmod: %d\n", lmod); |
| 1572 | return "(_invalid_)"; |
| 1573 | } |
| 1574 | } |
| 1575 | |
| 1576 | static const char *lmod_cast_s(struct parsed_op *po, |
| 1577 | enum opr_lenmod lmod) |
| 1578 | { |
| 1579 | switch (lmod) { |
| 1580 | case OPLM_QWORD: |
| 1581 | return "(s64)"; |
| 1582 | case OPLM_DWORD: |
| 1583 | return "(s32)"; |
| 1584 | case OPLM_WORD: |
| 1585 | return "(s16)"; |
| 1586 | case OPLM_BYTE: |
| 1587 | return "(s8)"; |
| 1588 | default: |
| 1589 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
| 1590 | return "(_invalid_)"; |
| 1591 | } |
| 1592 | } |
| 1593 | |
| 1594 | static const char *lmod_cast(struct parsed_op *po, |
| 1595 | enum opr_lenmod lmod, int is_signed) |
| 1596 | { |
| 1597 | return is_signed ? |
| 1598 | lmod_cast_s(po, lmod) : |
| 1599 | lmod_cast_u(po, lmod); |
| 1600 | } |
| 1601 | |
| 1602 | static int lmod_bytes(struct parsed_op *po, enum opr_lenmod lmod) |
| 1603 | { |
| 1604 | switch (lmod) { |
| 1605 | case OPLM_QWORD: |
| 1606 | return 8; |
| 1607 | case OPLM_DWORD: |
| 1608 | return 4; |
| 1609 | case OPLM_WORD: |
| 1610 | return 2; |
| 1611 | case OPLM_BYTE: |
| 1612 | return 1; |
| 1613 | default: |
| 1614 | ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); |
| 1615 | return 0; |
| 1616 | } |
| 1617 | } |
| 1618 | |
| 1619 | static const char *opr_name(struct parsed_op *po, int opr_num) |
| 1620 | { |
| 1621 | if (opr_num >= po->operand_cnt) |
| 1622 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
| 1623 | return po->operand[opr_num].name; |
| 1624 | } |
| 1625 | |
| 1626 | static unsigned int opr_const(struct parsed_op *po, int opr_num) |
| 1627 | { |
| 1628 | if (opr_num >= po->operand_cnt) |
| 1629 | ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); |
| 1630 | if (po->operand[opr_num].type != OPT_CONST) |
| 1631 | ferr(po, "opr %d: const expected\n", opr_num); |
| 1632 | return po->operand[opr_num].val; |
| 1633 | } |
| 1634 | |
| 1635 | static const char *opr_reg_p(struct parsed_op *po, struct parsed_opr *popr) |
| 1636 | { |
| 1637 | if ((unsigned int)popr->reg >= ARRAY_SIZE(regs_r32)) |
| 1638 | ferr(po, "invalid reg: %d\n", popr->reg); |
| 1639 | return regs_r32[popr->reg]; |
| 1640 | } |
| 1641 | |
| 1642 | static int check_simple_cast(const char *cast, int *bits, int *is_signed) |
| 1643 | { |
| 1644 | if (IS_START(cast, "(s8)") || IS_START(cast, "(u8)")) |
| 1645 | *bits = 8; |
| 1646 | else if (IS_START(cast, "(s16)") || IS_START(cast, "(u16)")) |
| 1647 | *bits = 16; |
| 1648 | else if (IS_START(cast, "(s32)") || IS_START(cast, "(u32)")) |
| 1649 | *bits = 32; |
| 1650 | else if (IS_START(cast, "(s64)") || IS_START(cast, "(u64)")) |
| 1651 | *bits = 64; |
| 1652 | else |
| 1653 | return -1; |
| 1654 | |
| 1655 | *is_signed = cast[1] == 's' ? 1 : 0; |
| 1656 | return 0; |
| 1657 | } |
| 1658 | |
| 1659 | static int check_deref_cast(const char *cast, int *bits) |
| 1660 | { |
| 1661 | if (IS_START(cast, "*(u8 *)")) |
| 1662 | *bits = 8; |
| 1663 | else if (IS_START(cast, "*(u16 *)")) |
| 1664 | *bits = 16; |
| 1665 | else if (IS_START(cast, "*(u32 *)")) |
| 1666 | *bits = 32; |
| 1667 | else if (IS_START(cast, "*(u64 *)")) |
| 1668 | *bits = 64; |
| 1669 | else |
| 1670 | return -1; |
| 1671 | |
| 1672 | return 0; |
| 1673 | } |
| 1674 | |
| 1675 | // cast1 is the "final" cast |
| 1676 | static const char *simplify_cast(const char *cast1, const char *cast2) |
| 1677 | { |
| 1678 | static char buf[256]; |
| 1679 | int bits1, bits2; |
| 1680 | int s1, s2; |
| 1681 | |
| 1682 | if (cast1[0] == 0) |
| 1683 | return cast2; |
| 1684 | if (cast2[0] == 0) |
| 1685 | return cast1; |
| 1686 | if (IS(cast1, cast2)) |
| 1687 | return cast1; |
| 1688 | |
| 1689 | if (check_simple_cast(cast1, &bits1, &s1) == 0 |
| 1690 | && check_simple_cast(cast2, &bits2, &s2) == 0) |
| 1691 | { |
| 1692 | if (bits1 <= bits2) |
| 1693 | return cast1; |
| 1694 | } |
| 1695 | if (check_simple_cast(cast1, &bits1, &s1) == 0 |
| 1696 | && check_deref_cast(cast2, &bits2) == 0) |
| 1697 | { |
| 1698 | if (bits1 == bits2) { |
| 1699 | snprintf(buf, sizeof(buf), "*(%c%d *)", s1 ? 's' : 'u', bits1); |
| 1700 | return buf; |
| 1701 | } |
| 1702 | } |
| 1703 | |
| 1704 | if (strchr(cast1, '*') && IS_START(cast2, "(u32)")) |
| 1705 | return cast1; |
| 1706 | |
| 1707 | snprintf(buf, sizeof(buf), "%s%s", cast1, cast2); |
| 1708 | return buf; |
| 1709 | } |
| 1710 | |
| 1711 | static const char *simplify_cast_num(const char *cast, unsigned int val) |
| 1712 | { |
| 1713 | if (IS(cast, "(u8)") && val < 0x100) |
| 1714 | return ""; |
| 1715 | if (IS(cast, "(s8)") && val < 0x80) |
| 1716 | return ""; |
| 1717 | if (IS(cast, "(u16)") && val < 0x10000) |
| 1718 | return ""; |
| 1719 | if (IS(cast, "(s16)") && val < 0x8000) |
| 1720 | return ""; |
| 1721 | if (IS(cast, "(s32)") && val < 0x80000000) |
| 1722 | return ""; |
| 1723 | |
| 1724 | return cast; |
| 1725 | } |
| 1726 | |
| 1727 | static struct parsed_equ *equ_find(struct parsed_op *po, const char *name, |
| 1728 | int *extra_offs) |
| 1729 | { |
| 1730 | const char *p; |
| 1731 | char *endp; |
| 1732 | int namelen; |
| 1733 | int i; |
| 1734 | |
| 1735 | *extra_offs = 0; |
| 1736 | namelen = strlen(name); |
| 1737 | |
| 1738 | p = strpbrk(name, "+-"); |
| 1739 | if (p != NULL) { |
| 1740 | namelen = p - name; |
| 1741 | if (namelen <= 0) |
| 1742 | ferr(po, "equ parse failed for '%s'\n", name); |
| 1743 | |
| 1744 | *extra_offs = strtol(p, &endp, 16); |
| 1745 | if (*endp != 0) |
| 1746 | ferr(po, "equ parse failed for '%s'\n", name); |
| 1747 | } |
| 1748 | |
| 1749 | for (i = 0; i < g_eqcnt; i++) |
| 1750 | if (strncmp(g_eqs[i].name, name, namelen) == 0 |
| 1751 | && g_eqs[i].name[namelen] == 0) |
| 1752 | break; |
| 1753 | if (i >= g_eqcnt) { |
| 1754 | if (po != NULL) |
| 1755 | ferr(po, "unresolved equ name: '%s'\n", name); |
| 1756 | return NULL; |
| 1757 | } |
| 1758 | |
| 1759 | return &g_eqs[i]; |
| 1760 | } |
| 1761 | |
| 1762 | static int is_stack_access(struct parsed_op *po, |
| 1763 | const struct parsed_opr *popr) |
| 1764 | { |
| 1765 | return (parse_stack_el(popr->name, NULL, NULL, 0) |
| 1766 | || (g_bp_frame && !(po->flags & OPF_EBP_S) |
| 1767 | && IS_START(popr->name, "ebp"))); |
| 1768 | } |
| 1769 | |
| 1770 | static void parse_stack_access(struct parsed_op *po, |
| 1771 | const char *name, char *ofs_reg, int *offset_out, |
| 1772 | int *stack_ra_out, const char **bp_arg_out, int is_lea) |
| 1773 | { |
| 1774 | const char *bp_arg = ""; |
| 1775 | const char *p = NULL; |
| 1776 | struct parsed_equ *eq; |
| 1777 | char *endp = NULL; |
| 1778 | int stack_ra = 0; |
| 1779 | int offset = 0; |
| 1780 | |
| 1781 | ofs_reg[0] = 0; |
| 1782 | |
| 1783 | if (IS_START(name, "ebp-") |
| 1784 | || (IS_START(name, "ebp+") && '0' <= name[4] && name[4] <= '9')) |
| 1785 | { |
| 1786 | p = name + 4; |
| 1787 | if (IS_START(p, "0x")) |
| 1788 | p += 2; |
| 1789 | offset = strtoul(p, &endp, 16); |
| 1790 | if (name[3] == '-') |
| 1791 | offset = -offset; |
| 1792 | if (*endp != 0) |
| 1793 | ferr(po, "ebp- parse of '%s' failed\n", name); |
| 1794 | } |
| 1795 | else { |
| 1796 | bp_arg = parse_stack_el(name, ofs_reg, NULL, 0); |
| 1797 | eq = equ_find(po, bp_arg, &offset); |
| 1798 | if (eq == NULL) |
| 1799 | ferr(po, "detected but missing eq\n"); |
| 1800 | offset += eq->offset; |
| 1801 | } |
| 1802 | |
| 1803 | if (!strncmp(name, "ebp", 3)) |
| 1804 | stack_ra = 4; |
| 1805 | |
| 1806 | // yes it sometimes LEAs ra for compares.. |
| 1807 | if (!is_lea && ofs_reg[0] == 0 |
| 1808 | && stack_ra <= offset && offset < stack_ra + 4) |
| 1809 | { |
| 1810 | ferr(po, "reference to ra? %d %d\n", offset, stack_ra); |
| 1811 | } |
| 1812 | |
| 1813 | *offset_out = offset; |
| 1814 | if (stack_ra_out) |
| 1815 | *stack_ra_out = stack_ra; |
| 1816 | if (bp_arg_out) |
| 1817 | *bp_arg_out = bp_arg; |
| 1818 | } |
| 1819 | |
| 1820 | static int parse_stack_esp_offset(struct parsed_op *po, |
| 1821 | const char *name, int *offset_out) |
| 1822 | { |
| 1823 | char ofs_reg[16] = { 0, }; |
| 1824 | struct parsed_equ *eq; |
| 1825 | const char *bp_arg; |
| 1826 | char *endp = NULL; |
| 1827 | int base_val = 0; |
| 1828 | int offset = 0; |
| 1829 | |
| 1830 | if (strstr(name, "esp") == NULL) |
| 1831 | return -1; |
| 1832 | bp_arg = parse_stack_el(name, ofs_reg, &base_val, 0); |
| 1833 | if (bp_arg == NULL) { |
| 1834 | // just plain offset? |
| 1835 | if (!IS_START(name, "esp+")) |
| 1836 | return -1; |
| 1837 | offset = strtol(name + 4, &endp, 0); |
| 1838 | if (endp == NULL || *endp != 0) |
| 1839 | return -1; |
| 1840 | *offset_out = offset; |
| 1841 | return 0; |
| 1842 | } |
| 1843 | |
| 1844 | if (ofs_reg[0] != 0) |
| 1845 | return -1; |
| 1846 | eq = equ_find(po, bp_arg, &offset); |
| 1847 | if (eq == NULL) |
| 1848 | ferr(po, "detected but missing eq\n"); |
| 1849 | offset += eq->offset; |
| 1850 | *offset_out = base_val + offset; |
| 1851 | return 0; |
| 1852 | } |
| 1853 | |
| 1854 | static int stack_frame_access(struct parsed_op *po, |
| 1855 | struct parsed_opr *popr, char *buf, size_t buf_size, |
| 1856 | const char *name, const char *cast, int is_src, int is_lea) |
| 1857 | { |
| 1858 | enum opr_lenmod tmp_lmod = OPLM_UNSPEC; |
| 1859 | const char *prefix = ""; |
| 1860 | const char *bp_arg = NULL; |
| 1861 | char ofs_reg[16] = { 0, }; |
| 1862 | int i, arg_i, arg_s; |
| 1863 | int unaligned = 0; |
| 1864 | int stack_ra = 0; |
| 1865 | int offset = 0; |
| 1866 | int retval = -1; |
| 1867 | int sf_ofs; |
| 1868 | |
| 1869 | if (po->flags & OPF_EBP_S) |
| 1870 | ferr(po, "stack_frame_access while ebp is scratch\n"); |
| 1871 | |
| 1872 | parse_stack_access(po, name, ofs_reg, &offset, |
| 1873 | &stack_ra, &bp_arg, is_lea); |
| 1874 | |
| 1875 | snprintf(g_comment, sizeof(g_comment), "%s", bp_arg); |
| 1876 | |
| 1877 | if (offset > stack_ra) |
| 1878 | { |
| 1879 | arg_i = (offset - stack_ra - 4) / 4; |
| 1880 | if (arg_i < 0 || arg_i >= g_func_pp->argc_stack) |
| 1881 | { |
| 1882 | if (g_func_pp->is_vararg |
| 1883 | && arg_i == g_func_pp->argc_stack && is_lea) |
| 1884 | { |
| 1885 | // should be va_list |
| 1886 | if (cast[0] == 0) |
| 1887 | cast = "(u32)"; |
| 1888 | snprintf(buf, buf_size, "%sap", cast); |
| 1889 | return -1; |
| 1890 | } |
| 1891 | ferr(po, "offset %d (%s,%d) doesn't map to any arg\n", |
| 1892 | offset, bp_arg, arg_i); |
| 1893 | } |
| 1894 | if (ofs_reg[0] != 0) |
| 1895 | ferr(po, "offset reg on arg access?\n"); |
| 1896 | |
| 1897 | for (i = arg_s = 0; i < g_func_pp->argc; i++) { |
| 1898 | if (g_func_pp->arg[i].reg != NULL) |
| 1899 | continue; |
| 1900 | if (arg_s == arg_i) |
| 1901 | break; |
| 1902 | arg_s++; |
| 1903 | } |
| 1904 | if (i == g_func_pp->argc) |
| 1905 | ferr(po, "arg %d not in prototype?\n", arg_i); |
| 1906 | |
| 1907 | popr->is_ptr = g_func_pp->arg[i].type.is_ptr; |
| 1908 | retval = i; |
| 1909 | |
| 1910 | switch (popr->lmod) |
| 1911 | { |
| 1912 | case OPLM_BYTE: |
| 1913 | if (is_lea) |
| 1914 | ferr(po, "lea/byte to arg?\n"); |
| 1915 | if (is_src && (offset & 3) == 0) |
| 1916 | snprintf(buf, buf_size, "%sa%d", |
| 1917 | simplify_cast(cast, "(u8)"), i + 1); |
| 1918 | else |
| 1919 | snprintf(buf, buf_size, "%sBYTE%d(a%d)", |
| 1920 | cast, offset & 3, i + 1); |
| 1921 | break; |
| 1922 | |
| 1923 | case OPLM_WORD: |
| 1924 | if (is_lea) |
| 1925 | ferr(po, "lea/word to arg?\n"); |
| 1926 | if (offset & 1) { |
| 1927 | unaligned = 1; |
| 1928 | if (!is_src) { |
| 1929 | if (offset & 2) |
| 1930 | ferr(po, "problematic arg store\n"); |
| 1931 | snprintf(buf, buf_size, "%s((char *)&a%d + 1)", |
| 1932 | simplify_cast(cast, "*(u16 *)"), i + 1); |
| 1933 | } |
| 1934 | else |
| 1935 | ferr(po, "unaligned arg word load\n"); |
| 1936 | } |
| 1937 | else if (is_src && (offset & 2) == 0) |
| 1938 | snprintf(buf, buf_size, "%sa%d", |
| 1939 | simplify_cast(cast, "(u16)"), i + 1); |
| 1940 | else |
| 1941 | snprintf(buf, buf_size, "%s%sWORD(a%d)", |
| 1942 | cast, (offset & 2) ? "HI" : "LO", i + 1); |
| 1943 | break; |
| 1944 | |
| 1945 | case OPLM_DWORD: |
| 1946 | if (cast[0]) |
| 1947 | prefix = cast; |
| 1948 | else if (is_src) |
| 1949 | prefix = "(u32)"; |
| 1950 | |
| 1951 | if (offset & 3) { |
| 1952 | unaligned = 1; |
| 1953 | if (is_lea) |
| 1954 | snprintf(buf, buf_size, "(u32)&a%d + %d", |
| 1955 | i + 1, offset & 3); |
| 1956 | else if (!is_src) |
| 1957 | ferr(po, "unaligned arg store\n"); |
| 1958 | else { |
| 1959 | // mov edx, [ebp+arg_4+2]; movsx ecx, dx |
| 1960 | snprintf(buf, buf_size, "%s(a%d >> %d)", |
| 1961 | prefix, i + 1, (offset & 3) * 8); |
| 1962 | } |
| 1963 | } |
| 1964 | else { |
| 1965 | snprintf(buf, buf_size, "%s%sa%d", |
| 1966 | prefix, is_lea ? "&" : "", i + 1); |
| 1967 | } |
| 1968 | break; |
| 1969 | |
| 1970 | default: |
| 1971 | ferr(po, "bp_arg bad lmod: %d\n", popr->lmod); |
| 1972 | } |
| 1973 | |
| 1974 | if (unaligned) |
| 1975 | strcat(g_comment, " unaligned"); |
| 1976 | |
| 1977 | // common problem |
| 1978 | guess_lmod_from_c_type(&tmp_lmod, &g_func_pp->arg[i].type); |
| 1979 | if (tmp_lmod != OPLM_DWORD |
| 1980 | && (unaligned || (!is_src && lmod_bytes(po, tmp_lmod) |
| 1981 | < lmod_bytes(po, popr->lmod) + (offset & 3)))) |
| 1982 | { |
| 1983 | ferr(po, "bp_arg arg%d/w offset %d and type '%s' is too small\n", |
| 1984 | i + 1, offset, g_func_pp->arg[i].type.name); |
| 1985 | } |
| 1986 | // can't check this because msvc likes to reuse |
| 1987 | // arg space for scratch.. |
| 1988 | //if (popr->is_ptr && popr->lmod != OPLM_DWORD) |
| 1989 | // ferr(po, "bp_arg arg%d: non-dword ptr access\n", i + 1); |
| 1990 | } |
| 1991 | else |
| 1992 | { |
| 1993 | if (g_stack_fsz == 0) |
| 1994 | ferr(po, "stack var access without stackframe\n"); |
| 1995 | g_stack_frame_used = 1; |
| 1996 | |
| 1997 | sf_ofs = g_stack_fsz + offset; |
| 1998 | if (ofs_reg[0] == 0 && (offset > 0 || sf_ofs < 0)) |
| 1999 | ferr(po, "bp_stack offset %d/%d\n", offset, g_stack_fsz); |
| 2000 | |
| 2001 | if (is_lea) |
| 2002 | prefix = "(u32)&"; |
| 2003 | else |
| 2004 | prefix = cast; |
| 2005 | |
| 2006 | switch (popr->lmod) |
| 2007 | { |
| 2008 | case OPLM_BYTE: |
| 2009 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
| 2010 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
| 2011 | break; |
| 2012 | |
| 2013 | case OPLM_WORD: |
| 2014 | if ((sf_ofs & 1) || ofs_reg[0] != 0) { |
| 2015 | // known unaligned or possibly unaligned |
| 2016 | strcat(g_comment, " unaligned"); |
| 2017 | if (prefix[0] == 0) |
| 2018 | prefix = "*(u16 *)&"; |
| 2019 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
| 2020 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
| 2021 | break; |
| 2022 | } |
| 2023 | snprintf(buf, buf_size, "%ssf.w[%d]", prefix, sf_ofs / 2); |
| 2024 | break; |
| 2025 | |
| 2026 | case OPLM_DWORD: |
| 2027 | if ((sf_ofs & 3) || ofs_reg[0] != 0) { |
| 2028 | // known unaligned or possibly unaligned |
| 2029 | strcat(g_comment, " unaligned"); |
| 2030 | if (prefix[0] == 0) |
| 2031 | prefix = "*(u32 *)&"; |
| 2032 | snprintf(buf, buf_size, "%ssf.b[%d%s%s]", |
| 2033 | prefix, sf_ofs, ofs_reg[0] ? "+" : "", ofs_reg); |
| 2034 | break; |
| 2035 | } |
| 2036 | snprintf(buf, buf_size, "%ssf.d[%d]", prefix, sf_ofs / 4); |
| 2037 | break; |
| 2038 | |
| 2039 | case OPLM_QWORD: |
| 2040 | ferr_assert(po, !(sf_ofs & 7)); |
| 2041 | ferr_assert(po, ofs_reg[0] == 0); |
| 2042 | // only used for x87 int64/float, float sets is_lea |
| 2043 | if (is_lea) |
| 2044 | snprintf(buf, buf_size, "%ssf.q[%d]", prefix, sf_ofs / 8); |
| 2045 | else |
| 2046 | snprintf(buf, buf_size, "*(s64 *)&sf.q[%d]", sf_ofs / 8); |
| 2047 | break; |
| 2048 | |
| 2049 | default: |
| 2050 | ferr(po, "bp_stack bad lmod: %d\n", popr->lmod); |
| 2051 | } |
| 2052 | } |
| 2053 | |
| 2054 | return retval; |
| 2055 | } |
| 2056 | |
| 2057 | static void check_func_pp(struct parsed_op *po, |
| 2058 | const struct parsed_proto *pp, const char *pfx) |
| 2059 | { |
| 2060 | enum opr_lenmod tmp_lmod; |
| 2061 | char buf[256]; |
| 2062 | int ret, i; |
| 2063 | |
| 2064 | if (pp->argc_reg != 0) { |
| 2065 | if (!g_allow_user_icall && !pp->is_fastcall) { |
| 2066 | pp_print(buf, sizeof(buf), pp); |
| 2067 | ferr(po, "%s: unexpected reg arg in icall: %s\n", pfx, buf); |
| 2068 | } |
| 2069 | if (pp->argc_stack > 0 && pp->argc_reg != 2) |
| 2070 | ferr(po, "%s: %d reg arg(s) with %d stack arg(s)\n", |
| 2071 | pfx, pp->argc_reg, pp->argc_stack); |
| 2072 | } |
| 2073 | |
| 2074 | // fptrs must use 32bit args, callsite might have no information and |
| 2075 | // lack a cast to smaller types, which results in incorrectly masked |
| 2076 | // args passed (callee may assume masked args, it does on ARM) |
| 2077 | if (!pp->is_osinc) { |
| 2078 | for (i = 0; i < pp->argc; i++) { |
| 2079 | ret = guess_lmod_from_c_type(&tmp_lmod, &pp->arg[i].type); |
| 2080 | if (ret && tmp_lmod != OPLM_DWORD) |
| 2081 | ferr(po, "reference to %s with arg%d '%s'\n", pp->name, |
| 2082 | i + 1, pp->arg[i].type.name); |
| 2083 | } |
| 2084 | } |
| 2085 | } |
| 2086 | |
| 2087 | static const char *check_label_read_ref(struct parsed_op *po, |
| 2088 | const char *name) |
| 2089 | { |
| 2090 | const struct parsed_proto *pp; |
| 2091 | |
| 2092 | pp = proto_parse(g_fhdr, name, 0); |
| 2093 | if (pp == NULL) |
| 2094 | ferr(po, "proto_parse failed for ref '%s'\n", name); |
| 2095 | |
| 2096 | if (pp->is_func) |
| 2097 | check_func_pp(po, pp, "ref"); |
| 2098 | |
| 2099 | return pp->name; |
| 2100 | } |
| 2101 | |
| 2102 | static char *out_src_opr(char *buf, size_t buf_size, |
| 2103 | struct parsed_op *po, struct parsed_opr *popr, const char *cast, |
| 2104 | int is_lea) |
| 2105 | { |
| 2106 | char tmp1[256], tmp2[256]; |
| 2107 | char expr[256]; |
| 2108 | const char *name; |
| 2109 | char *p; |
| 2110 | int ret; |
| 2111 | |
| 2112 | if (cast == NULL) |
| 2113 | cast = ""; |
| 2114 | |
| 2115 | switch (popr->type) { |
| 2116 | case OPT_REG: |
| 2117 | if (is_lea) |
| 2118 | ferr(po, "lea from reg?\n"); |
| 2119 | |
| 2120 | switch (popr->lmod) { |
| 2121 | case OPLM_QWORD: |
| 2122 | snprintf(buf, buf_size, "%s%s.q", cast, opr_reg_p(po, popr)); |
| 2123 | break; |
| 2124 | case OPLM_DWORD: |
| 2125 | snprintf(buf, buf_size, "%s%s", cast, opr_reg_p(po, popr)); |
| 2126 | break; |
| 2127 | case OPLM_WORD: |
| 2128 | snprintf(buf, buf_size, "%s%s", |
| 2129 | simplify_cast(cast, "(u16)"), opr_reg_p(po, popr)); |
| 2130 | break; |
| 2131 | case OPLM_BYTE: |
| 2132 | if (popr->name[1] == 'h') // XXX.. |
| 2133 | snprintf(buf, buf_size, "%s(%s >> 8)", |
| 2134 | simplify_cast(cast, "(u8)"), opr_reg_p(po, popr)); |
| 2135 | else |
| 2136 | snprintf(buf, buf_size, "%s%s", |
| 2137 | simplify_cast(cast, "(u8)"), opr_reg_p(po, popr)); |
| 2138 | break; |
| 2139 | default: |
| 2140 | ferr(po, "invalid src lmod: %d\n", popr->lmod); |
| 2141 | } |
| 2142 | break; |
| 2143 | |
| 2144 | case OPT_REGMEM: |
| 2145 | if (is_stack_access(po, popr)) { |
| 2146 | stack_frame_access(po, popr, buf, buf_size, |
| 2147 | popr->name, cast, 1, is_lea); |
| 2148 | break; |
| 2149 | } |
| 2150 | |
| 2151 | strcpy(expr, popr->name); |
| 2152 | if (strchr(expr, '[')) { |
| 2153 | // special case: '[' can only be left for label[reg] form |
| 2154 | ret = sscanf(expr, "%[^[][%[^]]]", tmp1, tmp2); |
| 2155 | if (ret != 2) |
| 2156 | ferr(po, "parse failure for '%s'\n", expr); |
| 2157 | if (tmp1[0] == '(') { |
| 2158 | // (off_4FFF50+3)[eax] |
| 2159 | p = strchr(tmp1 + 1, ')'); |
| 2160 | if (p == NULL || p[1] != 0) |
| 2161 | ferr(po, "parse failure (2) for '%s'\n", expr); |
| 2162 | *p = 0; |
| 2163 | memmove(tmp1, tmp1 + 1, strlen(tmp1)); |
| 2164 | } |
| 2165 | snprintf(expr, sizeof(expr), "(u32)&%s + %s", tmp1, tmp2); |
| 2166 | } |
| 2167 | |
| 2168 | // XXX: do we need more parsing? |
| 2169 | if (is_lea) { |
| 2170 | snprintf(buf, buf_size, "%s", expr); |
| 2171 | break; |
| 2172 | } |
| 2173 | |
| 2174 | snprintf(buf, buf_size, "%s(%s)", |
| 2175 | simplify_cast(cast, lmod_cast_u_ptr(po, popr->lmod)), expr); |
| 2176 | break; |
| 2177 | |
| 2178 | case OPT_LABEL: |
| 2179 | name = check_label_read_ref(po, popr->name); |
| 2180 | if (cast[0] == 0 && popr->is_ptr) |
| 2181 | cast = "(u32)"; |
| 2182 | |
| 2183 | if (is_lea) |
| 2184 | snprintf(buf, buf_size, "(u32)&%s", name); |
| 2185 | else if (popr->size_lt) |
| 2186 | snprintf(buf, buf_size, "%s%s%s%s", cast, |
| 2187 | lmod_cast_u_ptr(po, popr->lmod), |
| 2188 | popr->is_array ? "" : "&", name); |
| 2189 | else |
| 2190 | snprintf(buf, buf_size, "%s%s%s", cast, name, |
| 2191 | popr->is_array ? "[0]" : ""); |
| 2192 | break; |
| 2193 | |
| 2194 | case OPT_OFFSET: |
| 2195 | name = check_label_read_ref(po, popr->name); |
| 2196 | if (cast[0] == 0) |
| 2197 | cast = "(u32)"; |
| 2198 | if (is_lea) |
| 2199 | ferr(po, "lea an offset?\n"); |
| 2200 | snprintf(buf, buf_size, "%s&%s", cast, name); |
| 2201 | break; |
| 2202 | |
| 2203 | case OPT_CONST: |
| 2204 | if (is_lea) |
| 2205 | ferr(po, "lea from const?\n"); |
| 2206 | |
| 2207 | printf_number(tmp1, sizeof(tmp1), popr->val); |
| 2208 | if (popr->val == 0 && strchr(cast, '*')) |
| 2209 | snprintf(buf, buf_size, "NULL"); |
| 2210 | else |
| 2211 | snprintf(buf, buf_size, "%s%s", |
| 2212 | simplify_cast_num(cast, popr->val), tmp1); |
| 2213 | break; |
| 2214 | |
| 2215 | default: |
| 2216 | ferr(po, "invalid src type: %d\n", popr->type); |
| 2217 | } |
| 2218 | |
| 2219 | return buf; |
| 2220 | } |
| 2221 | |
| 2222 | // note: may set is_ptr (we find that out late for ebp frame..) |
| 2223 | static char *out_dst_opr(char *buf, size_t buf_size, |
| 2224 | struct parsed_op *po, struct parsed_opr *popr) |
| 2225 | { |
| 2226 | switch (popr->type) { |
| 2227 | case OPT_REG: |
| 2228 | switch (popr->lmod) { |
| 2229 | case OPLM_QWORD: |
| 2230 | snprintf(buf, buf_size, "%s.q", opr_reg_p(po, popr)); |
| 2231 | break; |
| 2232 | case OPLM_DWORD: |
| 2233 | snprintf(buf, buf_size, "%s", opr_reg_p(po, popr)); |
| 2234 | break; |
| 2235 | case OPLM_WORD: |
| 2236 | // ugh.. |
| 2237 | snprintf(buf, buf_size, "LOWORD(%s)", opr_reg_p(po, popr)); |
| 2238 | break; |
| 2239 | case OPLM_BYTE: |
| 2240 | // ugh.. |
| 2241 | if (popr->name[1] == 'h') // XXX.. |
| 2242 | snprintf(buf, buf_size, "BYTE1(%s)", opr_reg_p(po, popr)); |
| 2243 | else |
| 2244 | snprintf(buf, buf_size, "LOBYTE(%s)", opr_reg_p(po, popr)); |
| 2245 | break; |
| 2246 | default: |
| 2247 | ferr(po, "invalid dst lmod: %d\n", popr->lmod); |
| 2248 | } |
| 2249 | break; |
| 2250 | |
| 2251 | case OPT_REGMEM: |
| 2252 | if (is_stack_access(po, popr)) { |
| 2253 | stack_frame_access(po, popr, buf, buf_size, |
| 2254 | popr->name, "", 0, 0); |
| 2255 | break; |
| 2256 | } |
| 2257 | |
| 2258 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
| 2259 | |
| 2260 | case OPT_LABEL: |
| 2261 | if (popr->size_mismatch) |
| 2262 | snprintf(buf, buf_size, "%s%s%s", |
| 2263 | lmod_cast_u_ptr(po, popr->lmod), |
| 2264 | popr->is_array ? "" : "&", popr->name); |
| 2265 | else |
| 2266 | snprintf(buf, buf_size, "%s%s", popr->name, |
| 2267 | popr->is_array ? "[0]" : ""); |
| 2268 | break; |
| 2269 | |
| 2270 | default: |
| 2271 | ferr(po, "invalid dst type: %d\n", popr->type); |
| 2272 | } |
| 2273 | |
| 2274 | return buf; |
| 2275 | } |
| 2276 | |
| 2277 | static char *out_src_opr_u32(char *buf, size_t buf_size, |
| 2278 | struct parsed_op *po, struct parsed_opr *popr) |
| 2279 | { |
| 2280 | return out_src_opr(buf, buf_size, po, popr, NULL, 0); |
| 2281 | } |
| 2282 | |
| 2283 | static char *out_src_opr_float(char *buf, size_t buf_size, |
| 2284 | struct parsed_op *po, struct parsed_opr *popr, int need_float_stack) |
| 2285 | { |
| 2286 | const char *cast = NULL; |
| 2287 | char tmp[256]; |
| 2288 | |
| 2289 | switch (popr->type) { |
| 2290 | case OPT_REG: |
| 2291 | if (popr->reg < xST0 || popr->reg > xST7) |
| 2292 | ferr(po, "bad reg: %d\n", popr->reg); |
| 2293 | |
| 2294 | if (need_float_stack) { |
| 2295 | if (popr->reg == xST0) |
| 2296 | snprintf(buf, buf_size, "f_st[f_stp & 7]"); |
| 2297 | else |
| 2298 | snprintf(buf, buf_size, "f_st[(f_stp + %d) & 7]", |
| 2299 | popr->reg - xST0); |
| 2300 | } |
| 2301 | else |
| 2302 | snprintf(buf, buf_size, "f_st%d", popr->reg - xST0); |
| 2303 | break; |
| 2304 | |
| 2305 | case OPT_REGMEM: |
| 2306 | case OPT_LABEL: |
| 2307 | case OPT_OFFSET: |
| 2308 | switch (popr->lmod) { |
| 2309 | case OPLM_QWORD: |
| 2310 | cast = "double"; |
| 2311 | break; |
| 2312 | case OPLM_DWORD: |
| 2313 | cast = "float"; |
| 2314 | break; |
| 2315 | default: |
| 2316 | ferr(po, "unhandled lmod: %d\n", popr->lmod); |
| 2317 | break; |
| 2318 | } |
| 2319 | out_src_opr(tmp, sizeof(tmp), po, popr, "", 1); |
| 2320 | snprintf(buf, buf_size, "*(%s *)(%s)", cast, tmp); |
| 2321 | break; |
| 2322 | |
| 2323 | default: |
| 2324 | ferr(po, "invalid float type: %d\n", popr->type); |
| 2325 | } |
| 2326 | |
| 2327 | return buf; |
| 2328 | } |
| 2329 | |
| 2330 | static char *out_dst_opr_float(char *buf, size_t buf_size, |
| 2331 | struct parsed_op *po, struct parsed_opr *popr, int need_float_stack) |
| 2332 | { |
| 2333 | // same? |
| 2334 | return out_src_opr_float(buf, buf_size, po, popr, need_float_stack); |
| 2335 | } |
| 2336 | |
| 2337 | static void out_test_for_cc(char *buf, size_t buf_size, |
| 2338 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv, |
| 2339 | enum opr_lenmod lmod, const char *expr) |
| 2340 | { |
| 2341 | const char *cast, *scast; |
| 2342 | |
| 2343 | cast = lmod_cast_u(po, lmod); |
| 2344 | scast = lmod_cast_s(po, lmod); |
| 2345 | |
| 2346 | switch (pfo) { |
| 2347 | case PFO_Z: |
| 2348 | case PFO_BE: // CF==1||ZF==1; CF=0 |
| 2349 | snprintf(buf, buf_size, "(%s%s %s 0)", |
| 2350 | cast, expr, is_inv ? "!=" : "=="); |
| 2351 | break; |
| 2352 | |
| 2353 | case PFO_S: |
| 2354 | case PFO_L: // SF!=OF; OF=0 |
| 2355 | snprintf(buf, buf_size, "(%s%s %s 0)", |
| 2356 | scast, expr, is_inv ? ">=" : "<"); |
| 2357 | break; |
| 2358 | |
| 2359 | case PFO_LE: // ZF==1||SF!=OF; OF=0 |
| 2360 | snprintf(buf, buf_size, "(%s%s %s 0)", |
| 2361 | scast, expr, is_inv ? ">" : "<="); |
| 2362 | break; |
| 2363 | |
| 2364 | case PFO_C: // CF=0 |
| 2365 | case PFO_O: // OF=0 |
| 2366 | snprintf(buf, buf_size, "(%d)", !!is_inv); |
| 2367 | break; |
| 2368 | |
| 2369 | default: |
| 2370 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
| 2371 | } |
| 2372 | } |
| 2373 | |
| 2374 | static void out_cmp_for_cc(char *buf, size_t buf_size, |
| 2375 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv, |
| 2376 | int is_neg) |
| 2377 | { |
| 2378 | const char *cast, *scast, *cast_use; |
| 2379 | char buf1[256], buf2[256]; |
| 2380 | enum opr_lenmod lmod; |
| 2381 | |
| 2382 | if (po->op != OP_DEC && po->operand[0].lmod != po->operand[1].lmod) |
| 2383 | ferr(po, "%s: lmod mismatch: %d %d\n", __func__, |
| 2384 | po->operand[0].lmod, po->operand[1].lmod); |
| 2385 | lmod = po->operand[0].lmod; |
| 2386 | |
| 2387 | cast = lmod_cast_u(po, lmod); |
| 2388 | scast = lmod_cast_s(po, lmod); |
| 2389 | |
| 2390 | switch (pfo) { |
| 2391 | case PFO_C: |
| 2392 | case PFO_Z: |
| 2393 | case PFO_BE: // !a |
| 2394 | cast_use = cast; |
| 2395 | break; |
| 2396 | |
| 2397 | case PFO_S: |
| 2398 | case PFO_L: // !ge |
| 2399 | case PFO_LE: |
| 2400 | cast_use = scast; |
| 2401 | break; |
| 2402 | |
| 2403 | default: |
| 2404 | ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); |
| 2405 | } |
| 2406 | |
| 2407 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], cast_use, 0); |
| 2408 | if (po->op == OP_DEC) |
| 2409 | snprintf(buf2, sizeof(buf2), "1"); |
| 2410 | else { |
| 2411 | char cast_op2[64]; |
| 2412 | snprintf(cast_op2, sizeof(cast_op2) - 1, "%s", cast_use); |
| 2413 | if (is_neg) |
| 2414 | strcat(cast_op2, "-"); |
| 2415 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], cast_op2, 0); |
| 2416 | } |
| 2417 | |
| 2418 | switch (pfo) { |
| 2419 | case PFO_C: |
| 2420 | // note: must be unsigned compare |
| 2421 | snprintf(buf, buf_size, "(%s %s %s)", |
| 2422 | buf1, is_inv ? ">=" : "<", buf2); |
| 2423 | break; |
| 2424 | |
| 2425 | case PFO_Z: |
| 2426 | snprintf(buf, buf_size, "(%s %s %s)", |
| 2427 | buf1, is_inv ? "!=" : "==", buf2); |
| 2428 | break; |
| 2429 | |
| 2430 | case PFO_BE: // !a |
| 2431 | // note: must be unsigned compare |
| 2432 | snprintf(buf, buf_size, "(%s %s %s)", |
| 2433 | buf1, is_inv ? ">" : "<=", buf2); |
| 2434 | |
| 2435 | // annoying case |
| 2436 | if (is_inv && lmod == OPLM_BYTE |
| 2437 | && po->operand[1].type == OPT_CONST |
| 2438 | && po->operand[1].val == 0xff) |
| 2439 | { |
| 2440 | snprintf(g_comment, sizeof(g_comment), "if %s", buf); |
| 2441 | snprintf(buf, buf_size, "(0)"); |
| 2442 | } |
| 2443 | break; |
| 2444 | |
| 2445 | // note: must be signed compare |
| 2446 | case PFO_S: |
| 2447 | snprintf(buf, buf_size, "(%s(%s - %s) %s 0)", |
| 2448 | scast, buf1, buf2, is_inv ? ">=" : "<"); |
| 2449 | break; |
| 2450 | |
| 2451 | case PFO_L: // !ge |
| 2452 | snprintf(buf, buf_size, "(%s %s %s)", |
| 2453 | buf1, is_inv ? ">=" : "<", buf2); |
| 2454 | break; |
| 2455 | |
| 2456 | case PFO_LE: // !g |
| 2457 | snprintf(buf, buf_size, "(%s %s %s)", |
| 2458 | buf1, is_inv ? ">" : "<=", buf2); |
| 2459 | break; |
| 2460 | |
| 2461 | default: |
| 2462 | break; |
| 2463 | } |
| 2464 | } |
| 2465 | |
| 2466 | static void out_cmp_test(char *buf, size_t buf_size, |
| 2467 | struct parsed_op *po, enum parsed_flag_op pfo, int is_inv) |
| 2468 | { |
| 2469 | char buf1[256], buf2[256], buf3[256]; |
| 2470 | |
| 2471 | if (po->op == OP_TEST) { |
| 2472 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
| 2473 | out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[0]); |
| 2474 | } |
| 2475 | else { |
| 2476 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
| 2477 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
| 2478 | snprintf(buf3, sizeof(buf3), "(%s & %s)", buf1, buf2); |
| 2479 | } |
| 2480 | out_test_for_cc(buf, buf_size, po, pfo, is_inv, |
| 2481 | po->operand[0].lmod, buf3); |
| 2482 | } |
| 2483 | else if (po->op == OP_CMP) { |
| 2484 | out_cmp_for_cc(buf, buf_size, po, pfo, is_inv, 0); |
| 2485 | } |
| 2486 | else |
| 2487 | ferr(po, "%s: unhandled op: %d\n", __func__, po->op); |
| 2488 | } |
| 2489 | |
| 2490 | static void propagate_lmod(struct parsed_op *po, struct parsed_opr *popr1, |
| 2491 | struct parsed_opr *popr2) |
| 2492 | { |
| 2493 | if (popr1->lmod == OPLM_UNSPEC && popr2->lmod == OPLM_UNSPEC) |
| 2494 | ferr(po, "missing lmod for both operands\n"); |
| 2495 | |
| 2496 | if (popr1->lmod == OPLM_UNSPEC) |
| 2497 | popr1->lmod = popr2->lmod; |
| 2498 | else if (popr2->lmod == OPLM_UNSPEC) |
| 2499 | popr2->lmod = popr1->lmod; |
| 2500 | else if (popr1->lmod != popr2->lmod) { |
| 2501 | if (popr1->type_from_var) { |
| 2502 | popr1->size_mismatch = 1; |
| 2503 | if (popr1->lmod < popr2->lmod) |
| 2504 | popr1->size_lt = 1; |
| 2505 | popr1->lmod = popr2->lmod; |
| 2506 | } |
| 2507 | else if (popr2->type_from_var) { |
| 2508 | popr2->size_mismatch = 1; |
| 2509 | if (popr2->lmod < popr1->lmod) |
| 2510 | popr2->size_lt = 1; |
| 2511 | popr2->lmod = popr1->lmod; |
| 2512 | } |
| 2513 | else |
| 2514 | ferr(po, "conflicting lmods: %d vs %d\n", |
| 2515 | popr1->lmod, popr2->lmod); |
| 2516 | } |
| 2517 | } |
| 2518 | |
| 2519 | static const char *op_to_c(struct parsed_op *po) |
| 2520 | { |
| 2521 | switch (po->op) |
| 2522 | { |
| 2523 | case OP_ADD: |
| 2524 | case OP_ADC: |
| 2525 | return "+"; |
| 2526 | case OP_SUB: |
| 2527 | case OP_SBB: |
| 2528 | return "-"; |
| 2529 | case OP_AND: |
| 2530 | return "&"; |
| 2531 | case OP_OR: |
| 2532 | return "|"; |
| 2533 | case OP_XOR: |
| 2534 | return "^"; |
| 2535 | case OP_SHL: |
| 2536 | return "<<"; |
| 2537 | case OP_SHR: |
| 2538 | return ">>"; |
| 2539 | case OP_MUL: |
| 2540 | case OP_IMUL: |
| 2541 | return "*"; |
| 2542 | default: |
| 2543 | ferr(po, "op_to_c was supplied with %d\n", po->op); |
| 2544 | } |
| 2545 | } |
| 2546 | |
| 2547 | // last op in stream - unconditional branch or ret |
| 2548 | #define LAST_OP(_i) ((ops[_i].flags & OPF_TAIL) \ |
| 2549 | || ((ops[_i].flags & (OPF_JMP|OPF_CJMP|OPF_RMD)) == OPF_JMP \ |
| 2550 | && ops[_i].op != OP_CALL)) |
| 2551 | |
| 2552 | #define check_i(po, i) \ |
| 2553 | if ((i) < 0) \ |
| 2554 | ferr(po, "bad " #i ": %d\n", i) |
| 2555 | |
| 2556 | // note: this skips over calls and rm'd stuff assuming they're handled |
| 2557 | // so it's intended to use at one of final passes |
| 2558 | static int scan_for_pop(int i, int opcnt, int magic, int reg, |
| 2559 | int depth, int seen_noreturn, int flags_set) |
| 2560 | { |
| 2561 | struct parsed_op *po; |
| 2562 | int relevant; |
| 2563 | int ret = 0; |
| 2564 | int j; |
| 2565 | |
| 2566 | for (; i < opcnt; i++) { |
| 2567 | po = &ops[i]; |
| 2568 | if (po->cc_scratch == magic) |
| 2569 | return ret; // already checked |
| 2570 | po->cc_scratch = magic; |
| 2571 | |
| 2572 | if (po->flags & OPF_TAIL) { |
| 2573 | if (po->op == OP_CALL) { |
| 2574 | if (po->pp != NULL && po->pp->is_noreturn) |
| 2575 | seen_noreturn = 1; |
| 2576 | else |
| 2577 | return -1; |
| 2578 | } |
| 2579 | else |
| 2580 | return -1; // deadend |
| 2581 | } |
| 2582 | |
| 2583 | if (po->flags & (OPF_RMD|OPF_DONE|OPF_FARG)) |
| 2584 | continue; |
| 2585 | |
| 2586 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
| 2587 | if (po->btj != NULL) { |
| 2588 | // jumptable |
| 2589 | for (j = 0; j < po->btj->count; j++) { |
| 2590 | check_i(po, po->btj->d[j].bt_i); |
| 2591 | ret |= scan_for_pop(po->btj->d[j].bt_i, opcnt, magic, reg, |
| 2592 | depth, seen_noreturn, flags_set); |
| 2593 | if (ret < 0) |
| 2594 | return ret; // dead end |
| 2595 | } |
| 2596 | return ret; |
| 2597 | } |
| 2598 | |
| 2599 | check_i(po, po->bt_i); |
| 2600 | if (po->flags & OPF_CJMP) { |
| 2601 | ret |= scan_for_pop(po->bt_i, opcnt, magic, reg, |
| 2602 | depth, seen_noreturn, flags_set); |
| 2603 | if (ret < 0) |
| 2604 | return ret; // dead end |
| 2605 | } |
| 2606 | else { |
| 2607 | i = po->bt_i - 1; |
| 2608 | } |
| 2609 | continue; |
| 2610 | } |
| 2611 | |
| 2612 | relevant = 0; |
| 2613 | if ((po->op == OP_POP || po->op == OP_PUSH) |
| 2614 | && po->operand[0].type == OPT_REG && po->operand[0].reg == reg) |
| 2615 | { |
| 2616 | relevant = 1; |
| 2617 | } |
| 2618 | |
| 2619 | if (po->op == OP_PUSH) { |
| 2620 | depth++; |
| 2621 | } |
| 2622 | else if (po->op == OP_POP) { |
| 2623 | if (relevant && depth == 0) { |
| 2624 | po->flags |= flags_set; |
| 2625 | return 1; |
| 2626 | } |
| 2627 | depth--; |
| 2628 | } |
| 2629 | } |
| 2630 | |
| 2631 | // for noreturn, assume msvc skipped stack cleanup |
| 2632 | return seen_noreturn ? 1 : -1; |
| 2633 | } |
| 2634 | |
| 2635 | // scan for 'reg' pop backwards starting from i |
| 2636 | // intended to use for register restore search, so other reg |
| 2637 | // references are considered an error |
| 2638 | static int scan_for_rsave_pop_reg(int i, int magic, int reg, int set_flags) |
| 2639 | { |
| 2640 | struct parsed_op *po; |
| 2641 | struct label_ref *lr; |
| 2642 | int ret = 0; |
| 2643 | |
| 2644 | ops[i].cc_scratch = magic; |
| 2645 | |
| 2646 | while (1) |
| 2647 | { |
| 2648 | if (g_labels[i] != NULL) { |
| 2649 | lr = &g_label_refs[i]; |
| 2650 | for (; lr != NULL; lr = lr->next) { |
| 2651 | check_i(&ops[i], lr->i); |
| 2652 | ret |= scan_for_rsave_pop_reg(lr->i, magic, reg, set_flags); |
| 2653 | if (ret < 0) |
| 2654 | return ret; |
| 2655 | } |
| 2656 | if (i > 0 && LAST_OP(i - 1)) |
| 2657 | return ret; |
| 2658 | } |
| 2659 | |
| 2660 | i--; |
| 2661 | if (i < 0) |
| 2662 | break; |
| 2663 | |
| 2664 | if (ops[i].cc_scratch == magic) |
| 2665 | return ret; |
| 2666 | ops[i].cc_scratch = magic; |
| 2667 | |
| 2668 | po = &ops[i]; |
| 2669 | if (po->op == OP_POP && po->operand[0].reg == reg) { |
| 2670 | if (po->flags & (OPF_RMD|OPF_DONE)) |
| 2671 | return -1; |
| 2672 | |
| 2673 | po->flags |= set_flags; |
| 2674 | return 1; |
| 2675 | } |
| 2676 | |
| 2677 | // this also covers the case where we reach corresponding push |
| 2678 | if ((po->regmask_dst | po->regmask_src) & (1 << reg)) |
| 2679 | return -1; |
| 2680 | } |
| 2681 | |
| 2682 | // nothing interesting on this path |
| 2683 | return 0; |
| 2684 | } |
| 2685 | |
| 2686 | static void find_reachable_exits(int i, int opcnt, int magic, |
| 2687 | int *exits, int *exit_count) |
| 2688 | { |
| 2689 | struct parsed_op *po; |
| 2690 | int j; |
| 2691 | |
| 2692 | for (; i < opcnt; i++) |
| 2693 | { |
| 2694 | po = &ops[i]; |
| 2695 | if (po->cc_scratch == magic) |
| 2696 | return; |
| 2697 | po->cc_scratch = magic; |
| 2698 | |
| 2699 | if (po->flags & OPF_TAIL) { |
| 2700 | ferr_assert(po, *exit_count < MAX_EXITS); |
| 2701 | exits[*exit_count] = i; |
| 2702 | (*exit_count)++; |
| 2703 | return; |
| 2704 | } |
| 2705 | |
| 2706 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
| 2707 | if (po->flags & OPF_RMD) |
| 2708 | continue; |
| 2709 | |
| 2710 | if (po->btj != NULL) { |
| 2711 | for (j = 0; j < po->btj->count; j++) { |
| 2712 | check_i(po, po->btj->d[j].bt_i); |
| 2713 | find_reachable_exits(po->btj->d[j].bt_i, opcnt, magic, |
| 2714 | exits, exit_count); |
| 2715 | } |
| 2716 | return; |
| 2717 | } |
| 2718 | |
| 2719 | check_i(po, po->bt_i); |
| 2720 | if (po->flags & OPF_CJMP) |
| 2721 | find_reachable_exits(po->bt_i, opcnt, magic, exits, exit_count); |
| 2722 | else |
| 2723 | i = po->bt_i - 1; |
| 2724 | continue; |
| 2725 | } |
| 2726 | } |
| 2727 | } |
| 2728 | |
| 2729 | // scan for 'reg' pop backwards starting from exits (all paths) |
| 2730 | static int scan_for_pop_ret(int i, int opcnt, int reg, int set_flags) |
| 2731 | { |
| 2732 | static int exits[MAX_EXITS]; |
| 2733 | static int exit_count; |
| 2734 | int j, ret; |
| 2735 | |
| 2736 | if (!set_flags) { |
| 2737 | exit_count = 0; |
| 2738 | find_reachable_exits(i, opcnt, i + opcnt * 15, exits, |
| 2739 | &exit_count); |
| 2740 | ferr_assert(&ops[i], exit_count > 0); |
| 2741 | } |
| 2742 | |
| 2743 | for (j = 0; j < exit_count; j++) { |
| 2744 | ret = scan_for_rsave_pop_reg(exits[j], i + opcnt * 16 + set_flags, |
| 2745 | reg, set_flags); |
| 2746 | if (ret == -1) |
| 2747 | return -1; |
| 2748 | } |
| 2749 | |
| 2750 | return 1; |
| 2751 | } |
| 2752 | |
| 2753 | // scan for one or more pop of push <const> |
| 2754 | static int scan_for_pop_const_r(int i, int opcnt, int magic, |
| 2755 | int push_i, int is_probe) |
| 2756 | { |
| 2757 | struct parsed_op *po; |
| 2758 | struct label_ref *lr; |
| 2759 | int ret = 0; |
| 2760 | int j; |
| 2761 | |
| 2762 | for (; i < opcnt; i++) |
| 2763 | { |
| 2764 | po = &ops[i]; |
| 2765 | if (po->cc_scratch == magic) |
| 2766 | return ret; // already checked |
| 2767 | po->cc_scratch = magic; |
| 2768 | |
| 2769 | if (po->flags & OPF_JMP) { |
| 2770 | if (po->flags & OPF_RMD) |
| 2771 | continue; |
| 2772 | if (po->op == OP_CALL) |
| 2773 | return -1; |
| 2774 | |
| 2775 | if (po->btj != NULL) { |
| 2776 | for (j = 0; j < po->btj->count; j++) { |
| 2777 | check_i(po, po->btj->d[j].bt_i); |
| 2778 | ret |= scan_for_pop_const_r(po->btj->d[j].bt_i, opcnt, magic, |
| 2779 | push_i, is_probe); |
| 2780 | if (ret < 0) |
| 2781 | return ret; |
| 2782 | } |
| 2783 | return ret; |
| 2784 | } |
| 2785 | |
| 2786 | check_i(po, po->bt_i); |
| 2787 | if (po->flags & OPF_CJMP) { |
| 2788 | ret |= scan_for_pop_const_r(po->bt_i, opcnt, magic, push_i, |
| 2789 | is_probe); |
| 2790 | if (ret < 0) |
| 2791 | return ret; |
| 2792 | } |
| 2793 | else { |
| 2794 | i = po->bt_i - 1; |
| 2795 | } |
| 2796 | continue; |
| 2797 | } |
| 2798 | |
| 2799 | if ((po->flags & (OPF_TAIL|OPF_RSAVE)) || po->op == OP_PUSH) |
| 2800 | return -1; |
| 2801 | |
| 2802 | if (g_labels[i] != NULL) { |
| 2803 | // all refs must be visited |
| 2804 | lr = &g_label_refs[i]; |
| 2805 | for (; lr != NULL; lr = lr->next) { |
| 2806 | check_i(po, lr->i); |
| 2807 | if (ops[lr->i].cc_scratch != magic) |
| 2808 | return -1; |
| 2809 | } |
| 2810 | if (i > 0 && !LAST_OP(i - 1) && ops[i - 1].cc_scratch != magic) |
| 2811 | return -1; |
| 2812 | } |
| 2813 | |
| 2814 | if (po->op == OP_POP) |
| 2815 | { |
| 2816 | if (po->flags & (OPF_RMD|OPF_DONE)) |
| 2817 | return -1; |
| 2818 | |
| 2819 | if (!is_probe) { |
| 2820 | po->flags |= OPF_DONE; |
| 2821 | po->datap = &ops[push_i]; |
| 2822 | } |
| 2823 | return 1; |
| 2824 | } |
| 2825 | } |
| 2826 | |
| 2827 | return -1; |
| 2828 | } |
| 2829 | |
| 2830 | static void scan_for_pop_const(int i, int opcnt, int magic) |
| 2831 | { |
| 2832 | int ret; |
| 2833 | |
| 2834 | ret = scan_for_pop_const_r(i + 1, opcnt, magic, i, 1); |
| 2835 | if (ret == 1) { |
| 2836 | ops[i].flags |= OPF_RMD | OPF_DONE; |
| 2837 | scan_for_pop_const_r(i + 1, opcnt, magic + 1, i, 0); |
| 2838 | } |
| 2839 | } |
| 2840 | |
| 2841 | // check if all branch targets within a marked path are also marked |
| 2842 | // note: the path checked must not be empty or end with a branch |
| 2843 | static int check_path_branches(int opcnt, int magic) |
| 2844 | { |
| 2845 | struct parsed_op *po; |
| 2846 | int i, j; |
| 2847 | |
| 2848 | for (i = 0; i < opcnt; i++) { |
| 2849 | po = &ops[i]; |
| 2850 | if (po->cc_scratch != magic) |
| 2851 | continue; |
| 2852 | |
| 2853 | if (po->flags & OPF_JMP) { |
| 2854 | if ((po->flags & OPF_RMD) || po->op == OP_CALL) |
| 2855 | continue; |
| 2856 | |
| 2857 | if (po->btj != NULL) { |
| 2858 | for (j = 0; j < po->btj->count; j++) { |
| 2859 | check_i(po, po->btj->d[j].bt_i); |
| 2860 | if (ops[po->btj->d[j].bt_i].cc_scratch != magic) |
| 2861 | return 0; |
| 2862 | } |
| 2863 | } |
| 2864 | |
| 2865 | check_i(po, po->bt_i); |
| 2866 | if (ops[po->bt_i].cc_scratch != magic) |
| 2867 | return 0; |
| 2868 | if ((po->flags & OPF_CJMP) && ops[i + 1].cc_scratch != magic) |
| 2869 | return 0; |
| 2870 | } |
| 2871 | } |
| 2872 | |
| 2873 | return 1; |
| 2874 | } |
| 2875 | |
| 2876 | // scan for multiple pushes for given pop |
| 2877 | static int scan_pushes_for_pop_r(int i, int magic, int pop_i, |
| 2878 | int is_probe) |
| 2879 | { |
| 2880 | int reg = ops[pop_i].operand[0].reg; |
| 2881 | struct parsed_op *po; |
| 2882 | struct label_ref *lr; |
| 2883 | int ret = 0; |
| 2884 | |
| 2885 | ops[i].cc_scratch = magic; |
| 2886 | |
| 2887 | while (1) |
| 2888 | { |
| 2889 | if (g_labels[i] != NULL) { |
| 2890 | lr = &g_label_refs[i]; |
| 2891 | for (; lr != NULL; lr = lr->next) { |
| 2892 | check_i(&ops[i], lr->i); |
| 2893 | ret |= scan_pushes_for_pop_r(lr->i, magic, pop_i, is_probe); |
| 2894 | if (ret < 0) |
| 2895 | return ret; |
| 2896 | } |
| 2897 | if (i > 0 && LAST_OP(i - 1)) |
| 2898 | return ret; |
| 2899 | } |
| 2900 | |
| 2901 | i--; |
| 2902 | if (i < 0) |
| 2903 | break; |
| 2904 | |
| 2905 | if (ops[i].cc_scratch == magic) |
| 2906 | return ret; |
| 2907 | ops[i].cc_scratch = magic; |
| 2908 | |
| 2909 | po = &ops[i]; |
| 2910 | if (po->op == OP_CALL) |
| 2911 | return -1; |
| 2912 | if ((po->flags & (OPF_TAIL|OPF_RSAVE)) || po->op == OP_POP) |
| 2913 | return -1; |
| 2914 | |
| 2915 | if (po->op == OP_PUSH) |
| 2916 | { |
| 2917 | if (po->datap != NULL) |
| 2918 | return -1; |
| 2919 | if (po->operand[0].type == OPT_REG && po->operand[0].reg == reg) |
| 2920 | // leave this case for reg save/restore handlers |
| 2921 | return -1; |
| 2922 | |
| 2923 | if (!is_probe) { |
| 2924 | po->flags |= OPF_PPUSH | OPF_DONE; |
| 2925 | po->datap = &ops[pop_i]; |
| 2926 | } |
| 2927 | return 1; |
| 2928 | } |
| 2929 | } |
| 2930 | |
| 2931 | return -1; |
| 2932 | } |
| 2933 | |
| 2934 | static void scan_pushes_for_pop(int i, int opcnt, int *regmask_pp) |
| 2935 | { |
| 2936 | int magic = i + opcnt * 14; |
| 2937 | int ret; |
| 2938 | |
| 2939 | ret = scan_pushes_for_pop_r(i, magic, i, 1); |
| 2940 | if (ret == 1) { |
| 2941 | ret = check_path_branches(opcnt, magic); |
| 2942 | if (ret == 1) { |
| 2943 | ops[i].flags |= OPF_PPUSH | OPF_DONE; |
| 2944 | *regmask_pp |= 1 << ops[i].operand[0].reg; |
| 2945 | scan_pushes_for_pop_r(i, magic + 1, i, 0); |
| 2946 | } |
| 2947 | } |
| 2948 | } |
| 2949 | |
| 2950 | static void scan_propagate_df(int i, int opcnt) |
| 2951 | { |
| 2952 | struct parsed_op *po = &ops[i]; |
| 2953 | int j; |
| 2954 | |
| 2955 | for (; i < opcnt; i++) { |
| 2956 | po = &ops[i]; |
| 2957 | if (po->flags & OPF_DF) |
| 2958 | return; // already resolved |
| 2959 | po->flags |= OPF_DF; |
| 2960 | |
| 2961 | if (po->op == OP_CALL) |
| 2962 | ferr(po, "call with DF set?\n"); |
| 2963 | |
| 2964 | if (po->flags & OPF_JMP) { |
| 2965 | if (po->btj != NULL) { |
| 2966 | // jumptable |
| 2967 | for (j = 0; j < po->btj->count; j++) { |
| 2968 | check_i(po, po->btj->d[j].bt_i); |
| 2969 | scan_propagate_df(po->btj->d[j].bt_i, opcnt); |
| 2970 | } |
| 2971 | return; |
| 2972 | } |
| 2973 | |
| 2974 | if (po->flags & OPF_RMD) |
| 2975 | continue; |
| 2976 | check_i(po, po->bt_i); |
| 2977 | if (po->flags & OPF_CJMP) |
| 2978 | scan_propagate_df(po->bt_i, opcnt); |
| 2979 | else |
| 2980 | i = po->bt_i - 1; |
| 2981 | continue; |
| 2982 | } |
| 2983 | |
| 2984 | if (po->flags & OPF_TAIL) |
| 2985 | break; |
| 2986 | |
| 2987 | if (po->op == OP_CLD) { |
| 2988 | po->flags |= OPF_RMD | OPF_DONE; |
| 2989 | return; |
| 2990 | } |
| 2991 | } |
| 2992 | |
| 2993 | ferr(po, "missing DF clear?\n"); |
| 2994 | } |
| 2995 | |
| 2996 | // is operand 'opr' referenced by parsed_op 'po'? |
| 2997 | static int is_opr_referenced(const struct parsed_opr *opr, |
| 2998 | const struct parsed_op *po) |
| 2999 | { |
| 3000 | int i, mask; |
| 3001 | |
| 3002 | if (opr->type == OPT_REG) { |
| 3003 | mask = po->regmask_dst | po->regmask_src; |
| 3004 | if (po->op == OP_CALL) |
| 3005 | mask |= (1 << xAX) | (1 << xCX) | (1 << xDX); |
| 3006 | if ((1 << opr->reg) & mask) |
| 3007 | return 1; |
| 3008 | else |
| 3009 | return 0; |
| 3010 | } |
| 3011 | |
| 3012 | for (i = 0; i < po->operand_cnt; i++) |
| 3013 | if (IS(po->operand[0].name, opr->name)) |
| 3014 | return 1; |
| 3015 | |
| 3016 | return 0; |
| 3017 | } |
| 3018 | |
| 3019 | // is operand 'opr' read by parsed_op 'po'? |
| 3020 | static int is_opr_read(const struct parsed_opr *opr, |
| 3021 | const struct parsed_op *po) |
| 3022 | { |
| 3023 | if (opr->type == OPT_REG) { |
| 3024 | if (po->regmask_src & (1 << opr->reg)) |
| 3025 | return 1; |
| 3026 | else |
| 3027 | return 0; |
| 3028 | } |
| 3029 | |
| 3030 | // yes I'm lazy |
| 3031 | return 0; |
| 3032 | } |
| 3033 | |
| 3034 | // is operand 'opr' modified by parsed_op 'po'? |
| 3035 | static int is_opr_modified(const struct parsed_opr *opr, |
| 3036 | const struct parsed_op *po) |
| 3037 | { |
| 3038 | int mask; |
| 3039 | |
| 3040 | if (opr->type == OPT_REG) { |
| 3041 | if (po->op == OP_CALL) { |
| 3042 | mask = po->regmask_dst; |
| 3043 | mask |= (1 << xAX) | (1 << xCX) | (1 << xDX); // ? |
| 3044 | if (mask & (1 << opr->reg)) |
| 3045 | return 1; |
| 3046 | else |
| 3047 | return 0; |
| 3048 | } |
| 3049 | |
| 3050 | if (po->regmask_dst & (1 << opr->reg)) |
| 3051 | return 1; |
| 3052 | else |
| 3053 | return 0; |
| 3054 | } |
| 3055 | |
| 3056 | return IS(po->operand[0].name, opr->name); |
| 3057 | } |
| 3058 | |
| 3059 | // is any operand of parsed_op 'po_test' modified by parsed_op 'po'? |
| 3060 | static int is_any_opr_modified(const struct parsed_op *po_test, |
| 3061 | const struct parsed_op *po, int c_mode) |
| 3062 | { |
| 3063 | int mask; |
| 3064 | int i; |
| 3065 | |
| 3066 | if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA)) |
| 3067 | return 0; |
| 3068 | |
| 3069 | if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST) |
| 3070 | return 0; |
| 3071 | |
| 3072 | if ((po_test->regmask_src | po_test->regmask_dst) & po->regmask_dst) |
| 3073 | return 1; |
| 3074 | |
| 3075 | // in reality, it can wreck any register, but in decompiled C |
| 3076 | // version it can only overwrite eax or edx:eax |
| 3077 | mask = (1 << xAX) | (1 << xDX); |
| 3078 | if (!c_mode) |
| 3079 | mask |= 1 << xCX; |
| 3080 | |
| 3081 | if (po->op == OP_CALL |
| 3082 | && ((po_test->regmask_src | po_test->regmask_dst) & mask)) |
| 3083 | return 1; |
| 3084 | |
| 3085 | for (i = 0; i < po_test->operand_cnt; i++) |
| 3086 | if (IS(po_test->operand[i].name, po->operand[0].name)) |
| 3087 | return 1; |
| 3088 | |
| 3089 | return 0; |
| 3090 | } |
| 3091 | |
| 3092 | // scan for any po_test operand modification in range given |
| 3093 | static int scan_for_mod(struct parsed_op *po_test, int i, int opcnt, |
| 3094 | int c_mode) |
| 3095 | { |
| 3096 | if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST) |
| 3097 | return -1; |
| 3098 | |
| 3099 | for (; i < opcnt; i++) { |
| 3100 | if (is_any_opr_modified(po_test, &ops[i], c_mode)) |
| 3101 | return i; |
| 3102 | } |
| 3103 | |
| 3104 | return -1; |
| 3105 | } |
| 3106 | |
| 3107 | // scan for po_test operand[0] modification in range given |
| 3108 | static int scan_for_mod_opr0(struct parsed_op *po_test, |
| 3109 | int i, int opcnt) |
| 3110 | { |
| 3111 | for (; i < opcnt; i++) { |
| 3112 | if (is_opr_modified(&po_test->operand[0], &ops[i])) |
| 3113 | return i; |
| 3114 | } |
| 3115 | |
| 3116 | return -1; |
| 3117 | } |
| 3118 | |
| 3119 | static int try_resolve_const(int i, const struct parsed_opr *opr, |
| 3120 | int magic, unsigned int *val); |
| 3121 | |
| 3122 | static int scan_for_flag_set(int i, int opcnt, int magic, |
| 3123 | int *branched, int *setters, int *setter_cnt) |
| 3124 | { |
| 3125 | struct label_ref *lr; |
| 3126 | int ret; |
| 3127 | |
| 3128 | while (i >= 0) { |
| 3129 | if (ops[i].cc_scratch == magic) { |
| 3130 | // is this a problem? |
| 3131 | //ferr(&ops[i], "%s looped\n", __func__); |
| 3132 | return 0; |
| 3133 | } |
| 3134 | ops[i].cc_scratch = magic; |
| 3135 | |
| 3136 | if (g_labels[i] != NULL) { |
| 3137 | *branched = 1; |
| 3138 | |
| 3139 | lr = &g_label_refs[i]; |
| 3140 | for (; lr->next; lr = lr->next) { |
| 3141 | check_i(&ops[i], lr->i); |
| 3142 | ret = scan_for_flag_set(lr->i, opcnt, magic, |
| 3143 | branched, setters, setter_cnt); |
| 3144 | if (ret < 0) |
| 3145 | return ret; |
| 3146 | } |
| 3147 | |
| 3148 | check_i(&ops[i], lr->i); |
| 3149 | if (i > 0 && LAST_OP(i - 1)) { |
| 3150 | i = lr->i; |
| 3151 | continue; |
| 3152 | } |
| 3153 | ret = scan_for_flag_set(lr->i, opcnt, magic, |
| 3154 | branched, setters, setter_cnt); |
| 3155 | if (ret < 0) |
| 3156 | return ret; |
| 3157 | } |
| 3158 | i--; |
| 3159 | |
| 3160 | if (ops[i].flags & OPF_FLAGS) { |
| 3161 | setters[*setter_cnt] = i; |
| 3162 | (*setter_cnt)++; |
| 3163 | |
| 3164 | if (ops[i].flags & OPF_REP) { |
| 3165 | struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, xCX); |
| 3166 | unsigned int uval; |
| 3167 | |
| 3168 | ret = try_resolve_const(i, &opr, i + opcnt * 7, &uval); |
| 3169 | if (ret != 1 || uval == 0) { |
| 3170 | // can't treat it as full setter because of ecx=0 case, |
| 3171 | // also disallow delayed compare |
| 3172 | *branched = 1; |
| 3173 | continue; |
| 3174 | } |
| 3175 | } |
| 3176 | |
| 3177 | return 0; |
| 3178 | } |
| 3179 | |
| 3180 | if ((ops[i].flags & (OPF_JMP|OPF_CJMP)) == OPF_JMP) |
| 3181 | return -1; |
| 3182 | } |
| 3183 | |
| 3184 | return -1; |
| 3185 | } |
| 3186 | |
| 3187 | // scan back for cdq, if anything modifies edx, fail |
| 3188 | static int scan_for_cdq_edx(int i) |
| 3189 | { |
| 3190 | while (i >= 0) { |
| 3191 | if (g_labels[i] != NULL) { |
| 3192 | if (g_label_refs[i].next != NULL) |
| 3193 | return -1; |
| 3194 | if (i > 0 && LAST_OP(i - 1)) { |
| 3195 | i = g_label_refs[i].i; |
| 3196 | continue; |
| 3197 | } |
| 3198 | return -1; |
| 3199 | } |
| 3200 | i--; |
| 3201 | |
| 3202 | if (ops[i].op == OP_CDQ) |
| 3203 | return i; |
| 3204 | |
| 3205 | if (ops[i].regmask_dst & (1 << xDX)) |
| 3206 | return -1; |
| 3207 | } |
| 3208 | |
| 3209 | return -1; |
| 3210 | } |
| 3211 | |
| 3212 | static int scan_for_reg_clear(int i, int reg) |
| 3213 | { |
| 3214 | while (i >= 0) { |
| 3215 | if (g_labels[i] != NULL) { |
| 3216 | if (g_label_refs[i].next != NULL) |
| 3217 | return -1; |
| 3218 | if (i > 0 && LAST_OP(i - 1)) { |
| 3219 | i = g_label_refs[i].i; |
| 3220 | continue; |
| 3221 | } |
| 3222 | return -1; |
| 3223 | } |
| 3224 | i--; |
| 3225 | |
| 3226 | if (ops[i].op == OP_XOR |
| 3227 | && ops[i].operand[0].lmod == OPLM_DWORD |
| 3228 | && ops[i].operand[0].reg == ops[i].operand[1].reg |
| 3229 | && ops[i].operand[0].reg == reg) |
| 3230 | return i; |
| 3231 | |
| 3232 | if (ops[i].regmask_dst & (1 << reg)) |
| 3233 | return -1; |
| 3234 | } |
| 3235 | |
| 3236 | return -1; |
| 3237 | } |
| 3238 | |
| 3239 | static void patch_esp_adjust(struct parsed_op *po, int adj) |
| 3240 | { |
| 3241 | ferr_assert(po, po->op == OP_ADD); |
| 3242 | ferr_assert(po, IS(opr_name(po, 0), "esp")); |
| 3243 | ferr_assert(po, po->operand[1].type == OPT_CONST); |
| 3244 | |
| 3245 | // this is a bit of a hack, but deals with use of |
| 3246 | // single adj for multiple calls |
| 3247 | po->operand[1].val -= adj; |
| 3248 | po->flags |= OPF_RMD; |
| 3249 | if (po->operand[1].val == 0) |
| 3250 | po->flags |= OPF_DONE; |
| 3251 | ferr_assert(po, (int)po->operand[1].val >= 0); |
| 3252 | } |
| 3253 | |
| 3254 | // scan for positive, constant esp adjust |
| 3255 | // multipath case is preliminary |
| 3256 | static int scan_for_esp_adjust(int i, int opcnt, |
| 3257 | int adj_expect, int *adj, int *is_multipath, int do_update) |
| 3258 | { |
| 3259 | int adj_expect_unknown = 0; |
| 3260 | struct parsed_op *po; |
| 3261 | int first_pop = -1; |
| 3262 | int adj_best = 0; |
| 3263 | |
| 3264 | *adj = *is_multipath = 0; |
| 3265 | if (adj_expect < 0) { |
| 3266 | adj_expect_unknown = 1; |
| 3267 | adj_expect = 32 * 4; // enough? |
| 3268 | } |
| 3269 | |
| 3270 | for (; i < opcnt && *adj < adj_expect; i++) { |
| 3271 | if (g_labels[i] != NULL) |
| 3272 | *is_multipath = 1; |
| 3273 | |
| 3274 | po = &ops[i]; |
| 3275 | if (po->flags & OPF_DONE) |
| 3276 | continue; |
| 3277 | |
| 3278 | if (po->op == OP_ADD && po->operand[0].reg == xSP) { |
| 3279 | if (po->operand[1].type != OPT_CONST) |
| 3280 | ferr(&ops[i], "non-const esp adjust?\n"); |
| 3281 | *adj += po->operand[1].val; |
| 3282 | if (*adj & 3) |
| 3283 | ferr(&ops[i], "unaligned esp adjust: %x\n", *adj); |
| 3284 | if (do_update) { |
| 3285 | if (!*is_multipath) |
| 3286 | patch_esp_adjust(po, adj_expect); |
| 3287 | else |
| 3288 | po->flags |= OPF_RMD; |
| 3289 | } |
| 3290 | return i; |
| 3291 | } |
| 3292 | else if (po->op == OP_PUSH) { |
| 3293 | //if (first_pop == -1) |
| 3294 | // first_pop = -2; // none |
| 3295 | *adj -= lmod_bytes(po, po->operand[0].lmod); |
| 3296 | } |
| 3297 | else if (po->op == OP_POP) { |
| 3298 | if (!(po->flags & OPF_DONE)) { |
| 3299 | // seems like msvc only uses 'pop ecx' for stack realignment.. |
| 3300 | if (po->operand[0].type != OPT_REG || po->operand[0].reg != xCX) |
| 3301 | break; |
| 3302 | if (first_pop == -1 && *adj >= 0) |
| 3303 | first_pop = i; |
| 3304 | } |
| 3305 | if (do_update && *adj >= 0) { |
| 3306 | po->flags |= OPF_RMD; |
| 3307 | if (!*is_multipath) |
| 3308 | po->flags |= OPF_DONE | OPF_NOREGS; |
| 3309 | } |
| 3310 | |
| 3311 | *adj += lmod_bytes(po, po->operand[0].lmod); |
| 3312 | if (*adj > adj_best) |
| 3313 | adj_best = *adj; |
| 3314 | } |
| 3315 | else if (po->flags & (OPF_JMP|OPF_TAIL)) { |
| 3316 | if (po->op == OP_JMP && po->btj == NULL) { |
| 3317 | if (po->bt_i <= i) |
| 3318 | break; |
| 3319 | i = po->bt_i - 1; |
| 3320 | continue; |
| 3321 | } |
| 3322 | if (po->op != OP_CALL) |
| 3323 | break; |
| 3324 | if (po->operand[0].type != OPT_LABEL) |
| 3325 | break; |
| 3326 | if (po->pp != NULL && po->pp->is_stdcall) |
| 3327 | break; |
| 3328 | if (adj_expect_unknown && first_pop >= 0) |
| 3329 | break; |
| 3330 | // assume it's another cdecl call |
| 3331 | } |
| 3332 | } |
| 3333 | |
| 3334 | if (first_pop >= 0) { |
| 3335 | // probably only 'pop ecx' was used |
| 3336 | *adj = adj_best; |
| 3337 | return first_pop; |
| 3338 | } |
| 3339 | |
| 3340 | return -1; |
| 3341 | } |
| 3342 | |
| 3343 | static void scan_fwd_set_flags(int i, int opcnt, int magic, int flags) |
| 3344 | { |
| 3345 | struct parsed_op *po; |
| 3346 | int j; |
| 3347 | |
| 3348 | if (i < 0) |
| 3349 | ferr(ops, "%s: followed bad branch?\n", __func__); |
| 3350 | |
| 3351 | for (; i < opcnt; i++) { |
| 3352 | po = &ops[i]; |
| 3353 | if (po->cc_scratch == magic) |
| 3354 | return; |
| 3355 | po->cc_scratch = magic; |
| 3356 | po->flags |= flags; |
| 3357 | |
| 3358 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
| 3359 | if (po->btj != NULL) { |
| 3360 | // jumptable |
| 3361 | for (j = 0; j < po->btj->count; j++) |
| 3362 | scan_fwd_set_flags(po->btj->d[j].bt_i, opcnt, magic, flags); |
| 3363 | return; |
| 3364 | } |
| 3365 | |
| 3366 | scan_fwd_set_flags(po->bt_i, opcnt, magic, flags); |
| 3367 | if (!(po->flags & OPF_CJMP)) |
| 3368 | return; |
| 3369 | } |
| 3370 | if (po->flags & OPF_TAIL) |
| 3371 | return; |
| 3372 | } |
| 3373 | } |
| 3374 | |
| 3375 | static const struct parsed_proto *try_recover_pp( |
| 3376 | struct parsed_op *po, const struct parsed_opr *opr, |
| 3377 | int is_call, int *search_instead) |
| 3378 | { |
| 3379 | const struct parsed_proto *pp = NULL; |
| 3380 | char buf[256]; |
| 3381 | char *p; |
| 3382 | |
| 3383 | // maybe an arg of g_func? |
| 3384 | if (opr->type == OPT_REGMEM && is_stack_access(po, opr)) |
| 3385 | { |
| 3386 | char ofs_reg[16] = { 0, }; |
| 3387 | int arg, arg_s, arg_i; |
| 3388 | int stack_ra = 0; |
| 3389 | int offset = 0; |
| 3390 | |
| 3391 | if (g_header_mode) |
| 3392 | return NULL; |
| 3393 | |
| 3394 | parse_stack_access(po, opr->name, ofs_reg, |
| 3395 | &offset, &stack_ra, NULL, 0); |
| 3396 | if (ofs_reg[0] != 0) |
| 3397 | ferr(po, "offset reg on arg access?\n"); |
| 3398 | if (offset <= stack_ra) { |
| 3399 | // search who set the stack var instead |
| 3400 | if (search_instead != NULL) |
| 3401 | *search_instead = 1; |
| 3402 | return NULL; |
| 3403 | } |
| 3404 | |
| 3405 | arg_i = (offset - stack_ra - 4) / 4; |
| 3406 | for (arg = arg_s = 0; arg < g_func_pp->argc; arg++) { |
| 3407 | if (g_func_pp->arg[arg].reg != NULL) |
| 3408 | continue; |
| 3409 | if (arg_s == arg_i) |
| 3410 | break; |
| 3411 | arg_s++; |
| 3412 | } |
| 3413 | if (arg == g_func_pp->argc) |
| 3414 | ferr(po, "stack arg %d not in prototype?\n", arg_i); |
| 3415 | |
| 3416 | pp = g_func_pp->arg[arg].pp; |
| 3417 | if (is_call) { |
| 3418 | if (pp == NULL) |
| 3419 | ferr(po, "icall arg: arg%d has no pp\n", arg + 1); |
| 3420 | check_func_pp(po, pp, "icall arg"); |
| 3421 | } |
| 3422 | } |
| 3423 | else if (opr->type == OPT_REGMEM && strchr(opr->name + 1, '[')) { |
| 3424 | // label[index] |
| 3425 | p = strchr(opr->name + 1, '['); |
| 3426 | memcpy(buf, opr->name, p - opr->name); |
| 3427 | buf[p - opr->name] = 0; |
| 3428 | pp = proto_parse(g_fhdr, buf, g_quiet_pp); |
| 3429 | } |
| 3430 | else if (opr->type == OPT_OFFSET || opr->type == OPT_LABEL) { |
| 3431 | pp = proto_parse(g_fhdr, opr->name, g_quiet_pp); |
| 3432 | if (pp == NULL) { |
| 3433 | if (!g_header_mode) |
| 3434 | ferr(po, "proto_parse failed for icall to '%s'\n", opr->name); |
| 3435 | } |
| 3436 | else |
| 3437 | check_func_pp(po, pp, "reg-fptr ref"); |
| 3438 | } |
| 3439 | |
| 3440 | return pp; |
| 3441 | } |
| 3442 | |
| 3443 | static void scan_for_call_type(int i, const struct parsed_opr *opr, |
| 3444 | int magic, const struct parsed_proto **pp_found, int *pp_i, |
| 3445 | int *multi) |
| 3446 | { |
| 3447 | const struct parsed_proto *pp = NULL; |
| 3448 | struct parsed_op *po; |
| 3449 | struct label_ref *lr; |
| 3450 | |
| 3451 | ops[i].cc_scratch = magic; |
| 3452 | |
| 3453 | while (1) { |
| 3454 | if (g_labels[i] != NULL) { |
| 3455 | lr = &g_label_refs[i]; |
| 3456 | for (; lr != NULL; lr = lr->next) { |
| 3457 | check_i(&ops[i], lr->i); |
| 3458 | scan_for_call_type(lr->i, opr, magic, pp_found, pp_i, multi); |
| 3459 | } |
| 3460 | if (i > 0 && LAST_OP(i - 1)) |
| 3461 | return; |
| 3462 | } |
| 3463 | |
| 3464 | i--; |
| 3465 | if (i < 0) |
| 3466 | break; |
| 3467 | |
| 3468 | if (ops[i].cc_scratch == magic) |
| 3469 | return; |
| 3470 | ops[i].cc_scratch = magic; |
| 3471 | |
| 3472 | if (!(ops[i].flags & OPF_DATA)) |
| 3473 | continue; |
| 3474 | if (!is_opr_modified(opr, &ops[i])) |
| 3475 | continue; |
| 3476 | if (ops[i].op != OP_MOV && ops[i].op != OP_LEA) { |
| 3477 | // most probably trashed by some processing |
| 3478 | *pp_found = NULL; |
| 3479 | return; |
| 3480 | } |
| 3481 | |
| 3482 | opr = &ops[i].operand[1]; |
| 3483 | if (opr->type != OPT_REG) |
| 3484 | break; |
| 3485 | } |
| 3486 | |
| 3487 | po = (i >= 0) ? &ops[i] : ops; |
| 3488 | |
| 3489 | if (i < 0) { |
| 3490 | // reached the top - can only be an arg-reg |
| 3491 | if (opr->type != OPT_REG || g_func_pp == NULL) |
| 3492 | return; |
| 3493 | |
| 3494 | for (i = 0; i < g_func_pp->argc; i++) { |
| 3495 | if (g_func_pp->arg[i].reg == NULL) |
| 3496 | continue; |
| 3497 | if (IS(opr->name, g_func_pp->arg[i].reg)) |
| 3498 | break; |
| 3499 | } |
| 3500 | if (i == g_func_pp->argc) |
| 3501 | return; |
| 3502 | pp = g_func_pp->arg[i].pp; |
| 3503 | if (pp == NULL) |
| 3504 | ferr(po, "icall: arg%d (%s) is not a fptr?\n", |
| 3505 | i + 1, g_func_pp->arg[i].reg); |
| 3506 | check_func_pp(po, pp, "icall reg-arg"); |
| 3507 | } |
| 3508 | else |
| 3509 | pp = try_recover_pp(po, opr, 1, NULL); |
| 3510 | |
| 3511 | if (*pp_found != NULL && pp != NULL && *pp_found != pp) { |
| 3512 | if (!IS((*pp_found)->ret_type.name, pp->ret_type.name) |
| 3513 | || (*pp_found)->is_stdcall != pp->is_stdcall |
| 3514 | || (*pp_found)->is_fptr != pp->is_fptr |
| 3515 | || (*pp_found)->argc != pp->argc |
| 3516 | || (*pp_found)->argc_reg != pp->argc_reg |
| 3517 | || (*pp_found)->argc_stack != pp->argc_stack) |
| 3518 | { |
| 3519 | ferr(po, "icall: parsed_proto mismatch\n"); |
| 3520 | } |
| 3521 | *multi = 1; |
| 3522 | } |
| 3523 | if (pp != NULL) { |
| 3524 | *pp_found = pp; |
| 3525 | *pp_i = po - ops; |
| 3526 | } |
| 3527 | } |
| 3528 | |
| 3529 | static void add_label_ref(struct label_ref *lr, int op_i) |
| 3530 | { |
| 3531 | struct label_ref *lr_new; |
| 3532 | |
| 3533 | if (lr->i == -1) { |
| 3534 | lr->i = op_i; |
| 3535 | return; |
| 3536 | } |
| 3537 | |
| 3538 | lr_new = calloc(1, sizeof(*lr_new)); |
| 3539 | lr_new->i = op_i; |
| 3540 | lr_new->next = lr->next; |
| 3541 | lr->next = lr_new; |
| 3542 | } |
| 3543 | |
| 3544 | static struct parsed_data *try_resolve_jumptab(int i, int opcnt) |
| 3545 | { |
| 3546 | struct parsed_op *po = &ops[i]; |
| 3547 | struct parsed_data *pd; |
| 3548 | char label[NAMELEN], *p; |
| 3549 | int len, j, l; |
| 3550 | |
| 3551 | p = strchr(po->operand[0].name, '['); |
| 3552 | if (p == NULL) |
| 3553 | return NULL; |
| 3554 | |
| 3555 | len = p - po->operand[0].name; |
| 3556 | strncpy(label, po->operand[0].name, len); |
| 3557 | label[len] = 0; |
| 3558 | |
| 3559 | for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) { |
| 3560 | if (IS(g_func_pd[j].label, label)) { |
| 3561 | pd = &g_func_pd[j]; |
| 3562 | break; |
| 3563 | } |
| 3564 | } |
| 3565 | if (pd == NULL) |
| 3566 | //ferr(po, "label '%s' not parsed?\n", label); |
| 3567 | return NULL; |
| 3568 | |
| 3569 | if (pd->type != OPT_OFFSET) |
| 3570 | ferr(po, "label '%s' with non-offset data?\n", label); |
| 3571 | |
| 3572 | // find all labels, link |
| 3573 | for (j = 0; j < pd->count; j++) { |
| 3574 | for (l = 0; l < opcnt; l++) { |
| 3575 | if (g_labels[l] != NULL && IS(g_labels[l], pd->d[j].u.label)) { |
| 3576 | add_label_ref(&g_label_refs[l], i); |
| 3577 | pd->d[j].bt_i = l; |
| 3578 | break; |
| 3579 | } |
| 3580 | } |
| 3581 | } |
| 3582 | |
| 3583 | return pd; |
| 3584 | } |
| 3585 | |
| 3586 | static void clear_labels(int count) |
| 3587 | { |
| 3588 | int i; |
| 3589 | |
| 3590 | for (i = 0; i < count; i++) { |
| 3591 | if (g_labels[i] != NULL) { |
| 3592 | free(g_labels[i]); |
| 3593 | g_labels[i] = NULL; |
| 3594 | } |
| 3595 | } |
| 3596 | } |
| 3597 | |
| 3598 | static int get_pp_arg_regmask_src(const struct parsed_proto *pp) |
| 3599 | { |
| 3600 | int regmask = 0; |
| 3601 | int i, reg; |
| 3602 | |
| 3603 | for (i = 0; i < pp->argc; i++) { |
| 3604 | if (pp->arg[i].reg != NULL) { |
| 3605 | reg = char_array_i(regs_r32, |
| 3606 | ARRAY_SIZE(regs_r32), pp->arg[i].reg); |
| 3607 | if (reg < 0) |
| 3608 | ferr(ops, "arg '%s' of func '%s' is not a reg?\n", |
| 3609 | pp->arg[i].reg, pp->name); |
| 3610 | regmask |= 1 << reg; |
| 3611 | } |
| 3612 | } |
| 3613 | |
| 3614 | return regmask; |
| 3615 | } |
| 3616 | |
| 3617 | static int get_pp_arg_regmask_dst(const struct parsed_proto *pp) |
| 3618 | { |
| 3619 | int regmask = 0; |
| 3620 | int i, reg; |
| 3621 | |
| 3622 | if (pp->has_retreg) { |
| 3623 | for (i = 0; i < pp->argc; i++) { |
| 3624 | if (pp->arg[i].type.is_retreg) { |
| 3625 | reg = char_array_i(regs_r32, |
| 3626 | ARRAY_SIZE(regs_r32), pp->arg[i].reg); |
| 3627 | ferr_assert(ops, reg >= 0); |
| 3628 | regmask |= 1 << reg; |
| 3629 | } |
| 3630 | } |
| 3631 | } |
| 3632 | |
| 3633 | if (strstr(pp->ret_type.name, "int64")) |
| 3634 | return regmask | (1 << xAX) | (1 << xDX); |
| 3635 | if (IS(pp->ret_type.name, "float") |
| 3636 | || IS(pp->ret_type.name, "double")) |
| 3637 | { |
| 3638 | return regmask | mxST0; |
| 3639 | } |
| 3640 | if (strcasecmp(pp->ret_type.name, "void") == 0) |
| 3641 | return regmask; |
| 3642 | |
| 3643 | return regmask | mxAX; |
| 3644 | } |
| 3645 | |
| 3646 | static int are_ops_same(struct parsed_op *po1, struct parsed_op *po2) |
| 3647 | { |
| 3648 | return po1->op == po2->op && po1->operand_cnt == po2->operand_cnt |
| 3649 | && memcmp(po1->operand, po2->operand, |
| 3650 | sizeof(po1->operand[0]) * po1->operand_cnt) == 0; |
| 3651 | } |
| 3652 | |
| 3653 | static void resolve_branches_parse_calls(int opcnt) |
| 3654 | { |
| 3655 | static const struct { |
| 3656 | const char *name; |
| 3657 | enum op_op op; |
| 3658 | unsigned int flags; |
| 3659 | unsigned int regmask_src; |
| 3660 | unsigned int regmask_dst; |
| 3661 | } pseudo_ops[] = { |
| 3662 | { "__allshl", OPP_ALLSHL, OPF_DATA, mxAX|mxDX|mxCX, mxAX|mxDX }, |
| 3663 | { "__allshr", OPP_ALLSHR, OPF_DATA, mxAX|mxDX|mxCX, mxAX|mxDX }, |
| 3664 | { "__ftol", OPP_FTOL, OPF_FPOP, mxST0, mxAX | mxDX }, |
| 3665 | { "__CIpow", OPP_CIPOW, OPF_FPOP, mxST0|mxST1, mxST0 }, |
| 3666 | }; |
| 3667 | const struct parsed_proto *pp_c; |
| 3668 | struct parsed_proto *pp; |
| 3669 | struct parsed_data *pd; |
| 3670 | struct parsed_op *po; |
| 3671 | const char *tmpname; |
| 3672 | int i, l; |
| 3673 | int ret; |
| 3674 | |
| 3675 | for (i = 0; i < opcnt; i++) |
| 3676 | { |
| 3677 | po = &ops[i]; |
| 3678 | po->bt_i = -1; |
| 3679 | po->btj = NULL; |
| 3680 | |
| 3681 | if (po->datap != NULL) { |
| 3682 | pp = calloc(1, sizeof(*pp)); |
| 3683 | my_assert_not(pp, NULL); |
| 3684 | |
| 3685 | ret = parse_protostr(po->datap, pp); |
| 3686 | if (ret < 0) |
| 3687 | ferr(po, "bad protostr supplied: %s\n", (char *)po->datap); |
| 3688 | free(po->datap); |
| 3689 | po->datap = NULL; |
| 3690 | po->pp = pp; |
| 3691 | } |
| 3692 | |
| 3693 | if (po->op == OP_CALL) { |
| 3694 | pp = NULL; |
| 3695 | |
| 3696 | if (po->pp != NULL) |
| 3697 | pp = po->pp; |
| 3698 | else if (po->operand[0].type == OPT_LABEL) |
| 3699 | { |
| 3700 | tmpname = opr_name(po, 0); |
| 3701 | if (IS_START(tmpname, "loc_")) |
| 3702 | ferr(po, "call to loc_*\n"); |
| 3703 | if (IS(tmpname, "__alloca_probe")) |
| 3704 | continue; |
| 3705 | |
| 3706 | // convert some calls to pseudo-ops |
| 3707 | for (l = 0; l < ARRAY_SIZE(pseudo_ops); l++) { |
| 3708 | if (!IS(tmpname, pseudo_ops[l].name)) |
| 3709 | continue; |
| 3710 | |
| 3711 | po->op = pseudo_ops[l].op; |
| 3712 | po->operand_cnt = 0; |
| 3713 | po->regmask_src = pseudo_ops[l].regmask_src; |
| 3714 | po->regmask_dst = pseudo_ops[l].regmask_dst; |
| 3715 | po->flags = pseudo_ops[l].flags; |
| 3716 | po->flags |= po->regmask_dst ? OPF_DATA : 0; |
| 3717 | break; |
| 3718 | } |
| 3719 | if (l < ARRAY_SIZE(pseudo_ops)) |
| 3720 | continue; |
| 3721 | |
| 3722 | pp_c = proto_parse(g_fhdr, tmpname, g_header_mode); |
| 3723 | if (!g_header_mode && pp_c == NULL) |
| 3724 | ferr(po, "proto_parse failed for call '%s'\n", tmpname); |
| 3725 | |
| 3726 | if (pp_c != NULL) { |
| 3727 | pp = proto_clone(pp_c); |
| 3728 | my_assert_not(pp, NULL); |
| 3729 | } |
| 3730 | } |
| 3731 | |
| 3732 | if (pp != NULL) { |
| 3733 | if (pp->is_fptr) |
| 3734 | check_func_pp(po, pp, "fptr var call"); |
| 3735 | if (pp->is_noreturn) |
| 3736 | po->flags |= OPF_TAIL; |
| 3737 | } |
| 3738 | po->pp = pp; |
| 3739 | continue; |
| 3740 | } |
| 3741 | |
| 3742 | if (!(po->flags & OPF_JMP) || po->op == OP_RET) |
| 3743 | continue; |
| 3744 | |
| 3745 | if (po->operand[0].type == OPT_REGMEM) { |
| 3746 | pd = try_resolve_jumptab(i, opcnt); |
| 3747 | if (pd == NULL) |
| 3748 | goto tailcall; |
| 3749 | |
| 3750 | po->btj = pd; |
| 3751 | continue; |
| 3752 | } |
| 3753 | |
| 3754 | for (l = 0; l < opcnt; l++) { |
| 3755 | if (g_labels[l] != NULL |
| 3756 | && IS(po->operand[0].name, g_labels[l])) |
| 3757 | { |
| 3758 | if (l == i + 1 && po->op == OP_JMP) { |
| 3759 | // yet another alignment type.. |
| 3760 | po->flags |= OPF_RMD|OPF_DONE; |
| 3761 | break; |
| 3762 | } |
| 3763 | add_label_ref(&g_label_refs[l], i); |
| 3764 | po->bt_i = l; |
| 3765 | break; |
| 3766 | } |
| 3767 | } |
| 3768 | |
| 3769 | if (po->bt_i != -1 || (po->flags & OPF_RMD)) |
| 3770 | continue; |
| 3771 | |
| 3772 | if (po->operand[0].type == OPT_LABEL) |
| 3773 | // assume tail call |
| 3774 | goto tailcall; |
| 3775 | |
| 3776 | ferr(po, "unhandled branch\n"); |
| 3777 | |
| 3778 | tailcall: |
| 3779 | po->op = OP_CALL; |
| 3780 | po->flags |= OPF_TAIL; |
| 3781 | if (i > 0 && ops[i - 1].op == OP_POP) |
| 3782 | po->flags |= OPF_ATAIL; |
| 3783 | i--; // reprocess |
| 3784 | } |
| 3785 | } |
| 3786 | |
| 3787 | static void scan_prologue_epilogue(int opcnt) |
| 3788 | { |
| 3789 | int ecx_push = 0, esp_sub = 0, pusha = 0; |
| 3790 | int sandard_epilogue; |
| 3791 | int found; |
| 3792 | int i, j, l; |
| 3793 | |
| 3794 | if (ops[0].op == OP_PUSH && IS(opr_name(&ops[0], 0), "ebp") |
| 3795 | && ops[1].op == OP_MOV |
| 3796 | && IS(opr_name(&ops[1], 0), "ebp") |
| 3797 | && IS(opr_name(&ops[1], 1), "esp")) |
| 3798 | { |
| 3799 | g_bp_frame = 1; |
| 3800 | ops[0].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3801 | ops[1].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3802 | i = 2; |
| 3803 | |
| 3804 | if (ops[i].op == OP_PUSHA) { |
| 3805 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3806 | pusha = 1; |
| 3807 | i++; |
| 3808 | } |
| 3809 | |
| 3810 | if (ops[i].op == OP_SUB && IS(opr_name(&ops[i], 0), "esp")) { |
| 3811 | g_stack_fsz = opr_const(&ops[i], 1); |
| 3812 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3813 | i++; |
| 3814 | } |
| 3815 | else { |
| 3816 | // another way msvc builds stack frame.. |
| 3817 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
| 3818 | g_stack_fsz += 4; |
| 3819 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3820 | ecx_push++; |
| 3821 | i++; |
| 3822 | } |
| 3823 | // and another way.. |
| 3824 | if (i == 2 && ops[i].op == OP_MOV && ops[i].operand[0].reg == xAX |
| 3825 | && ops[i].operand[1].type == OPT_CONST |
| 3826 | && ops[i + 1].op == OP_CALL |
| 3827 | && IS(opr_name(&ops[i + 1], 0), "__alloca_probe")) |
| 3828 | { |
| 3829 | g_stack_fsz += ops[i].operand[1].val; |
| 3830 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3831 | i++; |
| 3832 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3833 | i++; |
| 3834 | } |
| 3835 | } |
| 3836 | |
| 3837 | found = 0; |
| 3838 | do { |
| 3839 | for (; i < opcnt; i++) |
| 3840 | if (ops[i].flags & OPF_TAIL) |
| 3841 | break; |
| 3842 | j = i - 1; |
| 3843 | if (i == opcnt && (ops[j].flags & OPF_JMP)) { |
| 3844 | if (ops[j].bt_i != -1 || ops[j].btj != NULL) |
| 3845 | break; |
| 3846 | i--; |
| 3847 | j--; |
| 3848 | } |
| 3849 | |
| 3850 | sandard_epilogue = 0; |
| 3851 | if (ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ebp")) |
| 3852 | { |
| 3853 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3854 | // the standard epilogue is sometimes even used without a sf |
| 3855 | if (ops[j - 1].op == OP_MOV |
| 3856 | && IS(opr_name(&ops[j - 1], 0), "esp") |
| 3857 | && IS(opr_name(&ops[j - 1], 1), "ebp")) |
| 3858 | sandard_epilogue = 1; |
| 3859 | } |
| 3860 | else if (ops[j].op == OP_LEAVE) |
| 3861 | { |
| 3862 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3863 | sandard_epilogue = 1; |
| 3864 | } |
| 3865 | else if (ops[i].op == OP_CALL && ops[i].pp != NULL |
| 3866 | && ops[i].pp->is_noreturn) |
| 3867 | { |
| 3868 | // on noreturn, msvc sometimes cleans stack, sometimes not |
| 3869 | i++; |
| 3870 | found = 1; |
| 3871 | continue; |
| 3872 | } |
| 3873 | else if (!(g_ida_func_attr & IDAFA_NORETURN)) |
| 3874 | ferr(&ops[j], "'pop ebp' expected\n"); |
| 3875 | |
| 3876 | if (g_stack_fsz != 0 || sandard_epilogue) { |
| 3877 | if (ops[j].op == OP_LEAVE) |
| 3878 | j--; |
| 3879 | else if (sandard_epilogue) // mov esp, ebp |
| 3880 | { |
| 3881 | ops[j - 1].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3882 | j -= 2; |
| 3883 | } |
| 3884 | else if (!(g_ida_func_attr & IDAFA_NORETURN)) |
| 3885 | { |
| 3886 | ferr(&ops[j], "esp restore expected\n"); |
| 3887 | } |
| 3888 | |
| 3889 | if (ecx_push && j >= 0 && ops[j].op == OP_POP |
| 3890 | && IS(opr_name(&ops[j], 0), "ecx")) |
| 3891 | { |
| 3892 | ferr(&ops[j], "unexpected ecx pop\n"); |
| 3893 | } |
| 3894 | } |
| 3895 | |
| 3896 | if (pusha) { |
| 3897 | if (ops[j].op == OP_POPA) |
| 3898 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3899 | else |
| 3900 | ferr(&ops[j], "popa expected\n"); |
| 3901 | } |
| 3902 | |
| 3903 | found = 1; |
| 3904 | i++; |
| 3905 | } while (i < opcnt); |
| 3906 | |
| 3907 | if (!found) |
| 3908 | ferr(ops, "missing ebp epilogue\n"); |
| 3909 | return; |
| 3910 | } |
| 3911 | |
| 3912 | // non-bp frame |
| 3913 | i = 0; |
| 3914 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
| 3915 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3916 | g_stack_fsz += 4; |
| 3917 | ecx_push++; |
| 3918 | i++; |
| 3919 | } |
| 3920 | |
| 3921 | for (; i < opcnt; i++) { |
| 3922 | if (ops[i].op == OP_PUSH || (ops[i].flags & (OPF_JMP|OPF_TAIL))) |
| 3923 | break; |
| 3924 | if (ops[i].op == OP_SUB && ops[i].operand[0].reg == xSP |
| 3925 | && ops[i].operand[1].type == OPT_CONST) |
| 3926 | { |
| 3927 | g_stack_fsz = ops[i].operand[1].val; |
| 3928 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3929 | i++; |
| 3930 | esp_sub = 1; |
| 3931 | break; |
| 3932 | } |
| 3933 | else if (ops[i].op == OP_MOV && ops[i].operand[0].reg == xAX |
| 3934 | && ops[i].operand[1].type == OPT_CONST |
| 3935 | && ops[i + 1].op == OP_CALL |
| 3936 | && IS(opr_name(&ops[i + 1], 0), "__alloca_probe")) |
| 3937 | { |
| 3938 | g_stack_fsz += ops[i].operand[1].val; |
| 3939 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3940 | i++; |
| 3941 | ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 3942 | i++; |
| 3943 | esp_sub = 1; |
| 3944 | break; |
| 3945 | } |
| 3946 | } |
| 3947 | |
| 3948 | if (ecx_push && !esp_sub) { |
| 3949 | // could actually be args for a call.. |
| 3950 | for (; i < opcnt; i++) |
| 3951 | if (ops[i].op != OP_PUSH) |
| 3952 | break; |
| 3953 | |
| 3954 | if (ops[i].op == OP_CALL && ops[i].operand[0].type == OPT_LABEL) { |
| 3955 | const struct parsed_proto *pp; |
| 3956 | pp = proto_parse(g_fhdr, opr_name(&ops[i], 0), 1); |
| 3957 | j = pp ? pp->argc_stack : 0; |
| 3958 | while (i > 0 && j > 0) { |
| 3959 | i--; |
| 3960 | if (ops[i].op == OP_PUSH) { |
| 3961 | ops[i].flags &= ~(OPF_RMD | OPF_DONE | OPF_NOREGS); |
| 3962 | j--; |
| 3963 | } |
| 3964 | } |
| 3965 | if (j != 0) |
| 3966 | ferr(&ops[i], "unhandled prologue\n"); |
| 3967 | |
| 3968 | // recheck |
| 3969 | i = g_stack_fsz = ecx_push = 0; |
| 3970 | while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { |
| 3971 | if (!(ops[i].flags & OPF_RMD)) |
| 3972 | break; |
| 3973 | g_stack_fsz += 4; |
| 3974 | ecx_push++; |
| 3975 | i++; |
| 3976 | } |
| 3977 | } |
| 3978 | } |
| 3979 | |
| 3980 | found = 0; |
| 3981 | if (ecx_push || esp_sub) |
| 3982 | { |
| 3983 | g_sp_frame = 1; |
| 3984 | |
| 3985 | do { |
| 3986 | for (; i < opcnt; i++) |
| 3987 | if (ops[i].flags & OPF_TAIL) |
| 3988 | break; |
| 3989 | |
| 3990 | j = i - 1; |
| 3991 | if (i == opcnt && (ops[j].flags & OPF_JMP)) { |
| 3992 | if (ops[j].bt_i != -1 || ops[j].btj != NULL) |
| 3993 | break; |
| 3994 | i--; |
| 3995 | j--; |
| 3996 | } |
| 3997 | |
| 3998 | if (ecx_push > 0) { |
| 3999 | for (l = 0; l < ecx_push; l++) { |
| 4000 | if (ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ecx")) |
| 4001 | /* pop ecx */; |
| 4002 | else if (ops[j].op == OP_ADD |
| 4003 | && IS(opr_name(&ops[j], 0), "esp") |
| 4004 | && ops[j].operand[1].type == OPT_CONST) |
| 4005 | { |
| 4006 | /* add esp, N */ |
| 4007 | l += ops[j].operand[1].val / 4 - 1; |
| 4008 | } |
| 4009 | else |
| 4010 | ferr(&ops[j], "'pop ecx' expected\n"); |
| 4011 | |
| 4012 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 4013 | j--; |
| 4014 | } |
| 4015 | if (l != ecx_push) |
| 4016 | ferr(&ops[j], "epilogue scan failed\n"); |
| 4017 | |
| 4018 | found = 1; |
| 4019 | } |
| 4020 | |
| 4021 | if (esp_sub) { |
| 4022 | if (ops[j].op != OP_ADD |
| 4023 | || !IS(opr_name(&ops[j], 0), "esp") |
| 4024 | || ops[j].operand[1].type != OPT_CONST |
| 4025 | || ops[j].operand[1].val != g_stack_fsz) |
| 4026 | { |
| 4027 | if (ops[i].op == OP_CALL && ops[i].pp != NULL |
| 4028 | && ops[i].pp->is_noreturn) |
| 4029 | { |
| 4030 | // noreturn tailcall with no epilogue |
| 4031 | i++; |
| 4032 | continue; |
| 4033 | } |
| 4034 | ferr(&ops[j], "'add esp' expected\n"); |
| 4035 | } |
| 4036 | |
| 4037 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS; |
| 4038 | ops[j].operand[1].val = 0; // hack for stack arg scanner |
| 4039 | found = 1; |
| 4040 | } |
| 4041 | |
| 4042 | i++; |
| 4043 | } while (i < opcnt); |
| 4044 | |
| 4045 | if (!found) |
| 4046 | ferr(ops, "missing esp epilogue\n"); |
| 4047 | } |
| 4048 | } |
| 4049 | |
| 4050 | // find an instruction that changed opr before i op |
| 4051 | // *op_i must be set to -1 by the caller |
| 4052 | // *is_caller is set to 1 if one source is determined to be g_func arg |
| 4053 | // returns 1 if found, *op_i is then set to origin |
| 4054 | // returns -1 if multiple origins are found |
| 4055 | static int resolve_origin(int i, const struct parsed_opr *opr, |
| 4056 | int magic, int *op_i, int *is_caller) |
| 4057 | { |
| 4058 | struct label_ref *lr; |
| 4059 | int ret = 0; |
| 4060 | |
| 4061 | while (1) { |
| 4062 | if (g_labels[i] != NULL) { |
| 4063 | lr = &g_label_refs[i]; |
| 4064 | for (; lr != NULL; lr = lr->next) { |
| 4065 | check_i(&ops[i], lr->i); |
| 4066 | ret |= resolve_origin(lr->i, opr, magic, op_i, is_caller); |
| 4067 | } |
| 4068 | if (i > 0 && LAST_OP(i - 1)) |
| 4069 | return ret; |
| 4070 | } |
| 4071 | |
| 4072 | i--; |
| 4073 | if (i < 0) { |
| 4074 | if (is_caller != NULL) |
| 4075 | *is_caller = 1; |
| 4076 | return -1; |
| 4077 | } |
| 4078 | |
| 4079 | if (ops[i].cc_scratch == magic) |
| 4080 | return ret; |
| 4081 | ops[i].cc_scratch = magic; |
| 4082 | |
| 4083 | if (!(ops[i].flags & OPF_DATA)) |
| 4084 | continue; |
| 4085 | if (!is_opr_modified(opr, &ops[i])) |
| 4086 | continue; |
| 4087 | |
| 4088 | if (*op_i >= 0) { |
| 4089 | if (*op_i == i || are_ops_same(&ops[*op_i], &ops[i])) |
| 4090 | return ret | 1; |
| 4091 | |
| 4092 | return -1; |
| 4093 | } |
| 4094 | |
| 4095 | *op_i = i; |
| 4096 | return ret | 1; |
| 4097 | } |
| 4098 | } |
| 4099 | |
| 4100 | // find an instruction that previously referenced opr |
| 4101 | // if multiple results are found - fail |
| 4102 | // *op_i must be set to -1 by the caller |
| 4103 | // returns 1 if found, *op_i is then set to referencer insn |
| 4104 | static int resolve_last_ref(int i, const struct parsed_opr *opr, |
| 4105 | int magic, int *op_i) |
| 4106 | { |
| 4107 | struct label_ref *lr; |
| 4108 | int ret = 0; |
| 4109 | |
| 4110 | while (1) { |
| 4111 | if (g_labels[i] != NULL) { |
| 4112 | lr = &g_label_refs[i]; |
| 4113 | for (; lr != NULL; lr = lr->next) { |
| 4114 | check_i(&ops[i], lr->i); |
| 4115 | ret |= resolve_last_ref(lr->i, opr, magic, op_i); |
| 4116 | } |
| 4117 | if (i > 0 && LAST_OP(i - 1)) |
| 4118 | return ret; |
| 4119 | } |
| 4120 | |
| 4121 | i--; |
| 4122 | if (i < 0) |
| 4123 | return -1; |
| 4124 | |
| 4125 | if (ops[i].cc_scratch == magic) |
| 4126 | return 0; |
| 4127 | ops[i].cc_scratch = magic; |
| 4128 | |
| 4129 | if (!is_opr_referenced(opr, &ops[i])) |
| 4130 | continue; |
| 4131 | |
| 4132 | if (*op_i >= 0) |
| 4133 | return -1; |
| 4134 | |
| 4135 | *op_i = i; |
| 4136 | return 1; |
| 4137 | } |
| 4138 | } |
| 4139 | |
| 4140 | // adjust datap of all reachable 'op' insns when moving back |
| 4141 | // returns 1 if at least 1 op was found |
| 4142 | // returns -1 if path without an op was found |
| 4143 | static int adjust_prev_op(int i, enum op_op op, int magic, void *datap) |
| 4144 | { |
| 4145 | struct label_ref *lr; |
| 4146 | int ret = 0; |
| 4147 | |
| 4148 | if (ops[i].cc_scratch == magic) |
| 4149 | return 0; |
| 4150 | ops[i].cc_scratch = magic; |
| 4151 | |
| 4152 | while (1) { |
| 4153 | if (g_labels[i] != NULL) { |
| 4154 | lr = &g_label_refs[i]; |
| 4155 | for (; lr != NULL; lr = lr->next) { |
| 4156 | check_i(&ops[i], lr->i); |
| 4157 | ret |= adjust_prev_op(lr->i, op, magic, datap); |
| 4158 | } |
| 4159 | if (i > 0 && LAST_OP(i - 1)) |
| 4160 | return ret; |
| 4161 | } |
| 4162 | |
| 4163 | i--; |
| 4164 | if (i < 0) |
| 4165 | return -1; |
| 4166 | |
| 4167 | if (ops[i].cc_scratch == magic) |
| 4168 | return 0; |
| 4169 | ops[i].cc_scratch = magic; |
| 4170 | |
| 4171 | if (ops[i].op != op) |
| 4172 | continue; |
| 4173 | |
| 4174 | ops[i].datap = datap; |
| 4175 | return 1; |
| 4176 | } |
| 4177 | } |
| 4178 | |
| 4179 | // find next instruction that reads opr |
| 4180 | // *op_i must be set to -1 by the caller |
| 4181 | // on return, *op_i is set to first referencer insn |
| 4182 | // returns 1 if exactly 1 referencer is found |
| 4183 | static int find_next_read(int i, int opcnt, |
| 4184 | const struct parsed_opr *opr, int magic, int *op_i) |
| 4185 | { |
| 4186 | struct parsed_op *po; |
| 4187 | int j, ret = 0; |
| 4188 | |
| 4189 | for (; i < opcnt; i++) |
| 4190 | { |
| 4191 | if (ops[i].cc_scratch == magic) |
| 4192 | return ret; |
| 4193 | ops[i].cc_scratch = magic; |
| 4194 | |
| 4195 | po = &ops[i]; |
| 4196 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
| 4197 | if (po->btj != NULL) { |
| 4198 | // jumptable |
| 4199 | for (j = 0; j < po->btj->count; j++) { |
| 4200 | check_i(po, po->btj->d[j].bt_i); |
| 4201 | ret |= find_next_read(po->btj->d[j].bt_i, opcnt, opr, |
| 4202 | magic, op_i); |
| 4203 | } |
| 4204 | return ret; |
| 4205 | } |
| 4206 | |
| 4207 | if (po->flags & OPF_RMD) |
| 4208 | continue; |
| 4209 | check_i(po, po->bt_i); |
| 4210 | if (po->flags & OPF_CJMP) { |
| 4211 | ret |= find_next_read(po->bt_i, opcnt, opr, magic, op_i); |
| 4212 | if (ret < 0) |
| 4213 | return ret; |
| 4214 | } |
| 4215 | else |
| 4216 | i = po->bt_i - 1; |
| 4217 | continue; |
| 4218 | } |
| 4219 | |
| 4220 | if (!is_opr_read(opr, po)) { |
| 4221 | int full_opr = 1; |
| 4222 | if (opr->type == OPT_REG && po->operand[0].type == OPT_REG |
| 4223 | && opr->reg == po->operand[0].reg && (po->flags & OPF_DATA)) |
| 4224 | { |
| 4225 | full_opr = po->operand[0].lmod >= opr->lmod; |
| 4226 | } |
| 4227 | if (is_opr_modified(opr, po) && full_opr) { |
| 4228 | // it's overwritten |
| 4229 | return ret; |
| 4230 | } |
| 4231 | if (po->flags & OPF_TAIL) |
| 4232 | return ret; |
| 4233 | continue; |
| 4234 | } |
| 4235 | |
| 4236 | if (*op_i >= 0) |
| 4237 | return -1; |
| 4238 | |
| 4239 | *op_i = i; |
| 4240 | return 1; |
| 4241 | } |
| 4242 | |
| 4243 | return 0; |
| 4244 | } |
| 4245 | |
| 4246 | // find next instruction that reads opr |
| 4247 | // *op_i must be set to -1 by the caller |
| 4248 | // on return, *op_i is set to first flag user insn |
| 4249 | // returns 1 if exactly 1 flag user is found |
| 4250 | static int find_next_flag_use(int i, int opcnt, int magic, int *op_i) |
| 4251 | { |
| 4252 | struct parsed_op *po; |
| 4253 | int j, ret = 0; |
| 4254 | |
| 4255 | for (; i < opcnt; i++) |
| 4256 | { |
| 4257 | if (ops[i].cc_scratch == magic) |
| 4258 | return ret; |
| 4259 | ops[i].cc_scratch = magic; |
| 4260 | |
| 4261 | po = &ops[i]; |
| 4262 | if (po->op == OP_CALL) |
| 4263 | return -1; |
| 4264 | if (po->flags & OPF_JMP) { |
| 4265 | if (po->btj != NULL) { |
| 4266 | // jumptable |
| 4267 | for (j = 0; j < po->btj->count; j++) { |
| 4268 | check_i(po, po->btj->d[j].bt_i); |
| 4269 | ret |= find_next_flag_use(po->btj->d[j].bt_i, opcnt, |
| 4270 | magic, op_i); |
| 4271 | } |
| 4272 | return ret; |
| 4273 | } |
| 4274 | |
| 4275 | if (po->flags & OPF_RMD) |
| 4276 | continue; |
| 4277 | check_i(po, po->bt_i); |
| 4278 | if (po->flags & OPF_CJMP) |
| 4279 | goto found; |
| 4280 | else |
| 4281 | i = po->bt_i - 1; |
| 4282 | continue; |
| 4283 | } |
| 4284 | |
| 4285 | if (!(po->flags & OPF_CC)) { |
| 4286 | if (po->flags & OPF_FLAGS) |
| 4287 | // flags changed |
| 4288 | return ret; |
| 4289 | if (po->flags & OPF_TAIL) |
| 4290 | return ret; |
| 4291 | continue; |
| 4292 | } |
| 4293 | |
| 4294 | found: |
| 4295 | if (*op_i >= 0) |
| 4296 | return -1; |
| 4297 | |
| 4298 | *op_i = i; |
| 4299 | return 1; |
| 4300 | } |
| 4301 | |
| 4302 | return 0; |
| 4303 | } |
| 4304 | |
| 4305 | static int try_resolve_const(int i, const struct parsed_opr *opr, |
| 4306 | int magic, unsigned int *val) |
| 4307 | { |
| 4308 | int s_i = -1; |
| 4309 | int ret; |
| 4310 | |
| 4311 | ret = resolve_origin(i, opr, magic, &s_i, NULL); |
| 4312 | if (ret == 1) { |
| 4313 | i = s_i; |
| 4314 | if (ops[i].op != OP_MOV && ops[i].operand[1].type != OPT_CONST) |
| 4315 | return -1; |
| 4316 | |
| 4317 | *val = ops[i].operand[1].val; |
| 4318 | return 1; |
| 4319 | } |
| 4320 | |
| 4321 | return -1; |
| 4322 | } |
| 4323 | |
| 4324 | static int resolve_used_bits(int i, int opcnt, int reg, |
| 4325 | int *mask, int *is_z_check) |
| 4326 | { |
| 4327 | struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_WORD, reg); |
| 4328 | int j = -1, k = -1; |
| 4329 | int ret; |
| 4330 | |
| 4331 | ret = find_next_read(i, opcnt, &opr, i + opcnt * 20, &j); |
| 4332 | if (ret != 1) |
| 4333 | return -1; |
| 4334 | |
| 4335 | find_next_read(j + 1, opcnt, &opr, i + opcnt * 20 + 1, &k); |
| 4336 | if (k != -1) { |
| 4337 | fnote(&ops[j], "(first read)\n"); |
| 4338 | ferr(&ops[k], "TODO: bit resolve: multiple readers\n"); |
| 4339 | } |
| 4340 | |
| 4341 | if (ops[j].op != OP_TEST || ops[j].operand[1].type != OPT_CONST) |
| 4342 | ferr(&ops[j], "TODO: bit resolve: not a const test\n"); |
| 4343 | |
| 4344 | ferr_assert(&ops[j], ops[j].operand[0].type == OPT_REG); |
| 4345 | ferr_assert(&ops[j], ops[j].operand[0].reg == reg); |
| 4346 | |
| 4347 | *mask = ops[j].operand[1].val; |
| 4348 | if (ops[j].operand[0].lmod == OPLM_BYTE |
| 4349 | && ops[j].operand[0].name[1] == 'h') |
| 4350 | { |
| 4351 | *mask <<= 8; |
| 4352 | } |
| 4353 | ferr_assert(&ops[j], (*mask & ~0xffff) == 0); |
| 4354 | |
| 4355 | *is_z_check = 0; |
| 4356 | ret = find_next_flag_use(j + 1, opcnt, i + opcnt * 20 + 2, &k); |
| 4357 | if (ret == 1) |
| 4358 | *is_z_check = ops[k].pfo == PFO_Z; |
| 4359 | |
| 4360 | return 0; |
| 4361 | } |
| 4362 | |
| 4363 | static const struct parsed_proto *resolve_deref(int i, int magic, |
| 4364 | struct parsed_opr *opr, int level) |
| 4365 | { |
| 4366 | struct parsed_opr opr_s = OPR_INIT(OPT_REG, OPLM_DWORD, 0); |
| 4367 | const struct parsed_proto *pp = NULL; |
| 4368 | int from_caller = 0; |
| 4369 | char s_reg[4]; |
| 4370 | int offset = 0; |
| 4371 | int len = 0; |
| 4372 | int j = -1; |
| 4373 | int k = -1; |
| 4374 | int reg; |
| 4375 | int ret; |
| 4376 | |
| 4377 | ret = sscanf(opr->name, "%3s+%x%n", s_reg, &offset, &len); |
| 4378 | if (ret != 2 || len != strlen(opr->name)) { |
| 4379 | ret = sscanf(opr->name, "%3s%n", s_reg, &len); |
| 4380 | if (ret != 1 || len != strlen(opr->name)) |
| 4381 | return NULL; |
| 4382 | } |
| 4383 | |
| 4384 | reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s_reg); |
| 4385 | if (reg < 0) |
| 4386 | return NULL; |
| 4387 | |
| 4388 | opr_s.reg = reg; |
| 4389 | ret = resolve_origin(i, &opr_s, i + magic, &j, NULL); |
| 4390 | if (ret != 1) |
| 4391 | return NULL; |
| 4392 | |
| 4393 | if (ops[j].op == OP_MOV && ops[j].operand[1].type == OPT_REGMEM |
| 4394 | && strlen(ops[j].operand[1].name) == 3 |
| 4395 | && ops[j].operand[0].lmod == OPLM_DWORD |
| 4396 | && ops[j].pp == NULL // no hint |
| 4397 | && level == 0) |
| 4398 | { |
| 4399 | // allow one simple dereference (com/directx) |
| 4400 | reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), |
| 4401 | ops[j].operand[1].name); |
| 4402 | if (reg < 0) |
| 4403 | return NULL; |
| 4404 | opr_s.reg = reg; |
| 4405 | ret = resolve_origin(j, &opr_s, j + magic, &k, NULL); |
| 4406 | if (ret != 1) |
| 4407 | return NULL; |
| 4408 | j = k; |
| 4409 | } |
| 4410 | if (ops[j].op != OP_MOV || ops[j].operand[0].lmod != OPLM_DWORD) |
| 4411 | return NULL; |
| 4412 | |
| 4413 | if (ops[j].pp != NULL) { |
| 4414 | // type hint in asm |
| 4415 | pp = ops[j].pp; |
| 4416 | } |
| 4417 | else if (ops[j].operand[1].type == OPT_REGMEM) { |
| 4418 | pp = try_recover_pp(&ops[j], &ops[j].operand[1], 0, NULL); |
| 4419 | if (pp == NULL) { |
| 4420 | // maybe structure ptr in structure |
| 4421 | pp = resolve_deref(j, magic, &ops[j].operand[1], level + 1); |
| 4422 | } |
| 4423 | } |
| 4424 | else if (ops[j].operand[1].type == OPT_LABEL) |
| 4425 | pp = proto_parse(g_fhdr, ops[j].operand[1].name, g_quiet_pp); |
| 4426 | else if (ops[j].operand[1].type == OPT_REG) { |
| 4427 | // maybe arg reg? |
| 4428 | k = -1; |
| 4429 | ret = resolve_origin(j, &ops[j].operand[1], i + magic, |
| 4430 | &k, &from_caller); |
| 4431 | if (ret != 1 && from_caller && k == -1 && g_func_pp != NULL) { |
| 4432 | for (k = 0; k < g_func_pp->argc; k++) { |
| 4433 | if (g_func_pp->arg[k].reg == NULL) |
| 4434 | continue; |
| 4435 | if (IS(g_func_pp->arg[k].reg, ops[j].operand[1].name)) { |
| 4436 | pp = g_func_pp->arg[k].pp; |
| 4437 | break; |
| 4438 | } |
| 4439 | } |
| 4440 | } |
| 4441 | } |
| 4442 | |
| 4443 | if (pp == NULL) |
| 4444 | return NULL; |
| 4445 | if (pp->is_func || pp->is_fptr || !pp->type.is_struct) { |
| 4446 | if (offset != 0) |
| 4447 | ferr(&ops[j], "expected struct, got '%s %s'\n", |
| 4448 | pp->type.name, pp->name); |
| 4449 | return NULL; |
| 4450 | } |
| 4451 | |
| 4452 | return proto_lookup_struct(g_fhdr, pp->type.name, offset); |
| 4453 | } |
| 4454 | |
| 4455 | static const struct parsed_proto *resolve_icall(int i, int opcnt, |
| 4456 | int *pp_i, int *multi_src) |
| 4457 | { |
| 4458 | const struct parsed_proto *pp = NULL; |
| 4459 | int search_advice = 0; |
| 4460 | |
| 4461 | *multi_src = 0; |
| 4462 | *pp_i = -1; |
| 4463 | |
| 4464 | switch (ops[i].operand[0].type) { |
| 4465 | case OPT_REGMEM: |
| 4466 | // try to resolve struct member calls |
| 4467 | pp = resolve_deref(i, i + opcnt * 19, &ops[i].operand[0], 0); |
| 4468 | if (pp != NULL) |
| 4469 | break; |
| 4470 | // fallthrough |
| 4471 | case OPT_LABEL: |
| 4472 | case OPT_OFFSET: |
| 4473 | pp = try_recover_pp(&ops[i], &ops[i].operand[0], |
| 4474 | 1, &search_advice); |
| 4475 | if (!search_advice) |
| 4476 | break; |
| 4477 | // fallthrough |
| 4478 | default: |
| 4479 | scan_for_call_type(i, &ops[i].operand[0], i + opcnt * 9, &pp, |
| 4480 | pp_i, multi_src); |
| 4481 | break; |
| 4482 | } |
| 4483 | |
| 4484 | return pp; |
| 4485 | } |
| 4486 | |
| 4487 | static struct parsed_proto *process_call_early(int i, int opcnt, |
| 4488 | int *adj_i) |
| 4489 | { |
| 4490 | struct parsed_op *po = &ops[i]; |
| 4491 | struct parsed_proto *pp; |
| 4492 | int multipath = 0; |
| 4493 | int adj = 0; |
| 4494 | int j, ret; |
| 4495 | |
| 4496 | pp = po->pp; |
| 4497 | if (pp == NULL || pp->is_vararg || pp->argc_reg != 0) |
| 4498 | // leave for later |
| 4499 | return NULL; |
| 4500 | |
| 4501 | // look for and make use of esp adjust |
| 4502 | *adj_i = ret = -1; |
| 4503 | if (!pp->is_stdcall && pp->argc_stack > 0) |
| 4504 | ret = scan_for_esp_adjust(i + 1, opcnt, |
| 4505 | pp->argc_stack * 4, &adj, &multipath, 0); |
| 4506 | if (ret >= 0) { |
| 4507 | if (pp->argc_stack > adj / 4) |
| 4508 | return NULL; |
| 4509 | if (multipath) |
| 4510 | return NULL; |
| 4511 | if (ops[ret].op == OP_POP) { |
| 4512 | for (j = 1; j < adj / 4; j++) { |
| 4513 | if (ops[ret + j].op != OP_POP |
| 4514 | || ops[ret + j].operand[0].reg != xCX) |
| 4515 | { |
| 4516 | return NULL; |
| 4517 | } |
| 4518 | } |
| 4519 | } |
| 4520 | } |
| 4521 | |
| 4522 | *adj_i = ret; |
| 4523 | return pp; |
| 4524 | } |
| 4525 | |
| 4526 | static struct parsed_proto *process_call(int i, int opcnt) |
| 4527 | { |
| 4528 | struct parsed_op *po = &ops[i]; |
| 4529 | const struct parsed_proto *pp_c; |
| 4530 | struct parsed_proto *pp; |
| 4531 | const char *tmpname; |
| 4532 | int call_i = -1, ref_i = -1; |
| 4533 | int adj = 0, multipath = 0; |
| 4534 | int ret, arg; |
| 4535 | |
| 4536 | tmpname = opr_name(po, 0); |
| 4537 | pp = po->pp; |
| 4538 | if (pp == NULL) |
| 4539 | { |
| 4540 | // indirect call |
| 4541 | pp_c = resolve_icall(i, opcnt, &call_i, &multipath); |
| 4542 | if (pp_c != NULL) { |
| 4543 | if (!pp_c->is_func && !pp_c->is_fptr) |
| 4544 | ferr(po, "call to non-func: %s\n", pp_c->name); |
| 4545 | pp = proto_clone(pp_c); |
| 4546 | my_assert_not(pp, NULL); |
| 4547 | if (multipath) |
| 4548 | // not resolved just to single func |
| 4549 | pp->is_fptr = 1; |
| 4550 | |
| 4551 | switch (po->operand[0].type) { |
| 4552 | case OPT_REG: |
| 4553 | // we resolved this call and no longer need the register |
| 4554 | po->regmask_src &= ~(1 << po->operand[0].reg); |
| 4555 | |
| 4556 | if (!multipath && i != call_i && ops[call_i].op == OP_MOV |
| 4557 | && ops[call_i].operand[1].type == OPT_LABEL) |
| 4558 | { |
| 4559 | // no other source users? |
| 4560 | ret = resolve_last_ref(i, &po->operand[0], i + opcnt * 10, |
| 4561 | &ref_i); |
| 4562 | if (ret == 1 && call_i == ref_i) { |
| 4563 | // and nothing uses it after us? |
| 4564 | ref_i = -1; |
| 4565 | find_next_read(i + 1, opcnt, &po->operand[0], |
| 4566 | i + opcnt * 11, &ref_i); |
| 4567 | if (ref_i == -1) |
| 4568 | // then also don't need the source mov |
| 4569 | ops[call_i].flags |= OPF_RMD | OPF_NOREGS; |
| 4570 | } |
| 4571 | } |
| 4572 | break; |
| 4573 | case OPT_REGMEM: |
| 4574 | pp->is_fptr = 1; |
| 4575 | break; |
| 4576 | default: |
| 4577 | break; |
| 4578 | } |
| 4579 | } |
| 4580 | if (pp == NULL) { |
| 4581 | pp = calloc(1, sizeof(*pp)); |
| 4582 | my_assert_not(pp, NULL); |
| 4583 | |
| 4584 | pp->is_fptr = 1; |
| 4585 | ret = scan_for_esp_adjust(i + 1, opcnt, |
| 4586 | -1, &adj, &multipath, 0); |
| 4587 | if (ret < 0 || adj < 0) { |
| 4588 | if (!g_allow_regfunc) |
| 4589 | ferr(po, "non-__cdecl indirect call unhandled yet\n"); |
| 4590 | pp->is_unresolved = 1; |
| 4591 | adj = 0; |
| 4592 | } |
| 4593 | adj /= 4; |
| 4594 | if (adj > ARRAY_SIZE(pp->arg)) |
| 4595 | ferr(po, "esp adjust too large: %d\n", adj); |
| 4596 | pp->ret_type.name = strdup("int"); |
| 4597 | pp->argc = pp->argc_stack = adj; |
| 4598 | for (arg = 0; arg < pp->argc; arg++) |
| 4599 | pp->arg[arg].type.name = strdup("int"); |
| 4600 | } |
| 4601 | po->pp = pp; |
| 4602 | } |
| 4603 | |
| 4604 | // look for and make use of esp adjust |
| 4605 | multipath = 0; |
| 4606 | ret = -1; |
| 4607 | if (!pp->is_stdcall && pp->argc_stack > 0) { |
| 4608 | int adj_expect = pp->is_vararg ? -1 : pp->argc_stack * 4; |
| 4609 | ret = scan_for_esp_adjust(i + 1, opcnt, |
| 4610 | adj_expect, &adj, &multipath, 0); |
| 4611 | } |
| 4612 | if (ret >= 0) { |
| 4613 | if (pp->is_vararg) { |
| 4614 | if (adj / 4 < pp->argc_stack) { |
| 4615 | fnote(po, "(this call)\n"); |
| 4616 | ferr(&ops[ret], "esp adjust is too small: %x < %x\n", |
| 4617 | adj, pp->argc_stack * 4); |
| 4618 | } |
| 4619 | // modify pp to make it have varargs as normal args |
| 4620 | arg = pp->argc; |
| 4621 | pp->argc += adj / 4 - pp->argc_stack; |
| 4622 | for (; arg < pp->argc; arg++) { |
| 4623 | pp->arg[arg].type.name = strdup("int"); |
| 4624 | pp->argc_stack++; |
| 4625 | } |
| 4626 | if (pp->argc > ARRAY_SIZE(pp->arg)) |
| 4627 | ferr(po, "too many args for '%s'\n", tmpname); |
| 4628 | } |
| 4629 | if (pp->argc_stack > adj / 4) { |
| 4630 | fnote(po, "(this call)\n"); |
| 4631 | ferr(&ops[ret], "stack tracking failed for '%s': %x %x\n", |
| 4632 | tmpname, pp->argc_stack * 4, adj); |
| 4633 | } |
| 4634 | |
| 4635 | scan_for_esp_adjust(i + 1, opcnt, |
| 4636 | pp->argc_stack * 4, &adj, &multipath, 1); |
| 4637 | } |
| 4638 | else if (pp->is_vararg) |
| 4639 | ferr(po, "missing esp_adjust for vararg func '%s'\n", |
| 4640 | pp->name); |
| 4641 | |
| 4642 | return pp; |
| 4643 | } |
| 4644 | |
| 4645 | static int collect_call_args_no_push(int i, struct parsed_proto *pp, |
| 4646 | int *regmask_ffca) |
| 4647 | { |
| 4648 | struct parsed_op *po; |
| 4649 | int offset = 0; |
| 4650 | int base_arg; |
| 4651 | int j, arg; |
| 4652 | int ret; |
| 4653 | |
| 4654 | for (base_arg = 0; base_arg < pp->argc; base_arg++) |
| 4655 | if (pp->arg[base_arg].reg == NULL) |
| 4656 | break; |
| 4657 | |
| 4658 | for (j = i; j > 0; ) |
| 4659 | { |
| 4660 | ferr_assert(&ops[j], g_labels[j] == NULL); |
| 4661 | j--; |
| 4662 | |
| 4663 | po = &ops[j]; |
| 4664 | ferr_assert(po, po->op != OP_PUSH); |
| 4665 | if (po->op == OP_FST) |
| 4666 | { |
| 4667 | if (po->operand[0].type != OPT_REGMEM) |
| 4668 | continue; |
| 4669 | ret = parse_stack_esp_offset(po, po->operand[0].name, &offset); |
| 4670 | if (ret != 0) |
| 4671 | continue; |
| 4672 | if (offset < 0 || offset >= pp->argc_stack * 4 || (offset & 3)) |
| 4673 | ferr(po, "bad offset %d (%d args)\n", offset, pp->argc_stack); |
| 4674 | |
| 4675 | arg = base_arg + offset / 4; |
| 4676 | po->p_argnext = -1; |
| 4677 | po->p_argnum = arg + 1; |
| 4678 | ferr_assert(po, pp->arg[arg].datap == NULL); |
| 4679 | pp->arg[arg].datap = po; |
| 4680 | po->flags |= OPF_DONE | OPF_FARGNR | OPF_FARG; |
| 4681 | if (regmask_ffca != NULL) |
| 4682 | *regmask_ffca |= 1 << arg; |
| 4683 | } |
| 4684 | else if (po->op == OP_SUB && po->operand[0].reg == xSP |
| 4685 | && po->operand[1].type == OPT_CONST) |
| 4686 | { |
| 4687 | po->flags |= OPF_RMD | OPF_DONE | OPF_FARGNR | OPF_FARG; |
| 4688 | break; |
| 4689 | } |
| 4690 | } |
| 4691 | |
| 4692 | for (arg = base_arg; arg < pp->argc; arg++) { |
| 4693 | ferr_assert(&ops[i], pp->arg[arg].reg == NULL); |
| 4694 | po = pp->arg[arg].datap; |
| 4695 | if (po == NULL) |
| 4696 | ferr(&ops[i], "arg %d/%d not found\n", arg, pp->argc); |
| 4697 | if (po->operand[0].lmod == OPLM_QWORD) |
| 4698 | arg++; |
| 4699 | } |
| 4700 | |
| 4701 | return 0; |
| 4702 | } |
| 4703 | |
| 4704 | static int collect_call_args_early(int i, struct parsed_proto *pp, |
| 4705 | int *regmask, int *regmask_ffca) |
| 4706 | { |
| 4707 | struct parsed_op *po; |
| 4708 | int arg, ret; |
| 4709 | int j; |
| 4710 | |
| 4711 | for (arg = 0; arg < pp->argc; arg++) |
| 4712 | if (pp->arg[arg].reg == NULL) |
| 4713 | break; |
| 4714 | |
| 4715 | // first see if it can be easily done |
| 4716 | for (j = i; j > 0 && arg < pp->argc; ) |
| 4717 | { |
| 4718 | if (g_labels[j] != NULL) |
| 4719 | return -1; |
| 4720 | j--; |
| 4721 | |
| 4722 | po = &ops[j]; |
| 4723 | if (po->op == OP_CALL) |
| 4724 | return -1; |
| 4725 | else if (po->op == OP_ADD && po->operand[0].reg == xSP) |
| 4726 | return -1; |
| 4727 | else if (po->op == OP_POP) |
| 4728 | return -1; |
| 4729 | else if (po->flags & OPF_CJMP) |
| 4730 | return -1; |
| 4731 | else if (po->op == OP_PUSH) { |
| 4732 | if (po->flags & (OPF_FARG|OPF_FARGNR)) |
| 4733 | return -1; |
| 4734 | if (!g_header_mode) { |
| 4735 | ret = scan_for_mod(po, j + 1, i, 1); |
| 4736 | if (ret >= 0) |
| 4737 | return -1; |
| 4738 | } |
| 4739 | |
| 4740 | if (pp->arg[arg].type.is_va_list) |
| 4741 | return -1; |
| 4742 | |
| 4743 | // next arg |
| 4744 | for (arg++; arg < pp->argc; arg++) |
| 4745 | if (pp->arg[arg].reg == NULL) |
| 4746 | break; |
| 4747 | } |
| 4748 | else if (po->op == OP_SUB && po->operand[0].reg == xSP |
| 4749 | && po->operand[1].type == OPT_CONST) |
| 4750 | { |
| 4751 | if (po->flags & (OPF_RMD|OPF_DONE)) |
| 4752 | return -1; |
| 4753 | if (po->operand[1].val != pp->argc_stack * 4) |
| 4754 | ferr(po, "unexpected esp adjust: %d\n", |
| 4755 | po->operand[1].val * 4); |
| 4756 | ferr_assert(po, pp->argc - arg == pp->argc_stack); |
| 4757 | return collect_call_args_no_push(i, pp, regmask_ffca); |
| 4758 | } |
| 4759 | } |
| 4760 | |
| 4761 | if (arg < pp->argc) |
| 4762 | return -1; |
| 4763 | |
| 4764 | // now do it |
| 4765 | for (arg = 0; arg < pp->argc; arg++) |
| 4766 | if (pp->arg[arg].reg == NULL) |
| 4767 | break; |
| 4768 | |
| 4769 | for (j = i; j > 0 && arg < pp->argc; ) |
| 4770 | { |
| 4771 | j--; |
| 4772 | |
| 4773 | if (ops[j].op == OP_PUSH) |
| 4774 | { |
| 4775 | ops[j].p_argnext = -1; |
| 4776 | ferr_assert(&ops[j], pp->arg[arg].datap == NULL); |
| 4777 | pp->arg[arg].datap = &ops[j]; |
| 4778 | |
| 4779 | if (regmask != NULL && ops[j].operand[0].type == OPT_REG) |
| 4780 | *regmask |= 1 << ops[j].operand[0].reg; |
| 4781 | |
| 4782 | ops[j].flags |= OPF_RMD | OPF_DONE | OPF_FARGNR | OPF_FARG; |
| 4783 | ops[j].flags &= ~OPF_RSAVE; |
| 4784 | |
| 4785 | // next arg |
| 4786 | for (arg++; arg < pp->argc; arg++) |
| 4787 | if (pp->arg[arg].reg == NULL) |
| 4788 | break; |
| 4789 | } |
| 4790 | } |
| 4791 | |
| 4792 | return 0; |
| 4793 | } |
| 4794 | |
| 4795 | static int sync_argnum(struct parsed_op *po, int argnum) |
| 4796 | { |
| 4797 | struct parsed_op *po_tmp; |
| 4798 | |
| 4799 | // see if other branches don't have higher argnum |
| 4800 | for (po_tmp = po; po_tmp != NULL; ) { |
| 4801 | if (argnum < po_tmp->p_argnum) |
| 4802 | argnum = po_tmp->p_argnum; |
| 4803 | // note: p_argnext is active on current collect_call_args only |
| 4804 | po_tmp = po_tmp->p_argnext >= 0 ? &ops[po_tmp->p_argnext] : NULL; |
| 4805 | } |
| 4806 | |
| 4807 | // make all argnums consistent |
| 4808 | for (po_tmp = po; po_tmp != NULL; ) { |
| 4809 | if (po_tmp->p_argnum != 0) |
| 4810 | po_tmp->p_argnum = argnum; |
| 4811 | po_tmp = po_tmp->p_argnext >= 0 ? &ops[po_tmp->p_argnext] : NULL; |
| 4812 | } |
| 4813 | |
| 4814 | return argnum; |
| 4815 | } |
| 4816 | |
| 4817 | static int collect_call_args_r(struct parsed_op *po, int i, |
| 4818 | struct parsed_proto *pp, int *regmask, int *arg_grp, |
| 4819 | int arg, int argnum, int magic, int need_op_saving, int may_reuse) |
| 4820 | { |
| 4821 | struct parsed_proto *pp_tmp; |
| 4822 | struct parsed_op *po_tmp; |
| 4823 | struct label_ref *lr; |
| 4824 | int need_to_save_current; |
| 4825 | int arg_grp_current = 0; |
| 4826 | int save_args_seen = 0; |
| 4827 | int ret = 0; |
| 4828 | int reg; |
| 4829 | char buf[32]; |
| 4830 | int j, k; |
| 4831 | |
| 4832 | if (i < 0) { |
| 4833 | ferr(po, "dead label encountered\n"); |
| 4834 | return -1; |
| 4835 | } |
| 4836 | |
| 4837 | for (; arg < pp->argc; arg++, argnum++) |
| 4838 | if (pp->arg[arg].reg == NULL) |
| 4839 | break; |
| 4840 | magic = (magic & 0xffffff) | (arg << 24); |
| 4841 | |
| 4842 | for (j = i; j >= 0 && (arg < pp->argc || pp->is_unresolved); ) |
| 4843 | { |
| 4844 | if (((ops[j].cc_scratch ^ magic) & 0xffffff) == 0) { |
| 4845 | if (ops[j].cc_scratch != magic) { |
| 4846 | ferr(&ops[j], "arg collect hit same path with diff args for %s\n", |
| 4847 | pp->name); |
| 4848 | return -1; |
| 4849 | } |
| 4850 | // ok: have already been here |
| 4851 | return 0; |
| 4852 | } |
| 4853 | ops[j].cc_scratch = magic; |
| 4854 | |
| 4855 | if (g_labels[j] != NULL && g_label_refs[j].i != -1) { |
| 4856 | lr = &g_label_refs[j]; |
| 4857 | if (lr->next != NULL) |
| 4858 | need_op_saving = 1; |
| 4859 | for (; lr->next; lr = lr->next) { |
| 4860 | check_i(&ops[j], lr->i); |
| 4861 | if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP) |
| 4862 | may_reuse = 1; |
| 4863 | ret = collect_call_args_r(po, lr->i, pp, regmask, arg_grp, |
| 4864 | arg, argnum, magic, need_op_saving, may_reuse); |
| 4865 | if (ret < 0) |
| 4866 | return ret; |
| 4867 | } |
| 4868 | |
| 4869 | check_i(&ops[j], lr->i); |
| 4870 | if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP) |
| 4871 | may_reuse = 1; |
| 4872 | if (j > 0 && LAST_OP(j - 1)) { |
| 4873 | // follow last branch in reverse |
| 4874 | j = lr->i; |
| 4875 | continue; |
| 4876 | } |
| 4877 | need_op_saving = 1; |
| 4878 | ret = collect_call_args_r(po, lr->i, pp, regmask, arg_grp, |
| 4879 | arg, argnum, magic, need_op_saving, may_reuse); |
| 4880 | if (ret < 0) |
| 4881 | return ret; |
| 4882 | } |
| 4883 | j--; |
| 4884 | |
| 4885 | if (ops[j].op == OP_CALL) |
| 4886 | { |
| 4887 | if (pp->is_unresolved) |
| 4888 | break; |
| 4889 | |
| 4890 | pp_tmp = ops[j].pp; |
| 4891 | if (pp_tmp == NULL) |
| 4892 | ferr(po, "arg collect hit unparsed call '%s'\n", |
| 4893 | ops[j].operand[0].name); |
| 4894 | if (may_reuse && pp_tmp->argc_stack > 0) |
| 4895 | ferr(po, "arg collect %d/%d hit '%s' with %d stack args\n", |
| 4896 | arg, pp->argc, opr_name(&ops[j], 0), pp_tmp->argc_stack); |
| 4897 | } |
| 4898 | // esp adjust of 0 means we collected it before |
| 4899 | else if (ops[j].op == OP_ADD && ops[j].operand[0].reg == xSP |
| 4900 | && (ops[j].operand[1].type != OPT_CONST |
| 4901 | || ops[j].operand[1].val != 0)) |
| 4902 | { |
| 4903 | if (pp->is_unresolved) |
| 4904 | break; |
| 4905 | |
| 4906 | fnote(po, "(this call)\n"); |
| 4907 | ferr(&ops[j], "arg collect %d/%d hit esp adjust of %d\n", |
| 4908 | arg, pp->argc, ops[j].operand[1].val); |
| 4909 | } |
| 4910 | else if (ops[j].op == OP_POP && !(ops[j].flags & OPF_DONE)) |
| 4911 | { |
| 4912 | if (pp->is_unresolved) |
| 4913 | break; |
| 4914 | |
| 4915 | fnote(po, "(this call)\n"); |
| 4916 | ferr(&ops[j], "arg collect %d/%d hit pop\n", arg, pp->argc); |
| 4917 | } |
| 4918 | else if (ops[j].flags & OPF_CJMP) |
| 4919 | { |
| 4920 | if (pp->is_unresolved) |
| 4921 | break; |
| 4922 | |
| 4923 | may_reuse = 1; |
| 4924 | } |
| 4925 | else if (ops[j].op == OP_PUSH |
| 4926 | && !(ops[j].flags & (OPF_FARGNR|OPF_DONE))) |
| 4927 | { |
| 4928 | if (pp->is_unresolved && (ops[j].flags & OPF_RMD)) |
| 4929 | break; |
| 4930 | |
| 4931 | ops[j].p_argnext = -1; |
| 4932 | po_tmp = pp->arg[arg].datap; |
| 4933 | if (po_tmp != NULL) |
| 4934 | ops[j].p_argnext = po_tmp - ops; |
| 4935 | pp->arg[arg].datap = &ops[j]; |
| 4936 | |
| 4937 | argnum = sync_argnum(&ops[j], argnum); |
| 4938 | |
| 4939 | need_to_save_current = 0; |
| 4940 | reg = -1; |
| 4941 | if (ops[j].operand[0].type == OPT_REG) |
| 4942 | reg = ops[j].operand[0].reg; |
| 4943 | |
| 4944 | if (!need_op_saving) { |
| 4945 | ret = scan_for_mod(&ops[j], j + 1, i, 1); |
| 4946 | need_to_save_current = (ret >= 0); |
| 4947 | } |
| 4948 | if (need_op_saving || need_to_save_current) { |
| 4949 | // mark this arg as one that needs operand saving |
| 4950 | pp->arg[arg].is_saved = 1; |
| 4951 | |
| 4952 | if (save_args_seen & (1 << (argnum - 1))) { |
| 4953 | save_args_seen = 0; |
| 4954 | arg_grp_current++; |
| 4955 | if (arg_grp_current >= MAX_ARG_GRP) |
| 4956 | ferr(&ops[j], "out of arg groups (arg%d), f %s\n", |
| 4957 | argnum, pp->name); |
| 4958 | } |
| 4959 | } |
| 4960 | else if (ops[j].p_argnum == 0) |
| 4961 | ops[j].flags |= OPF_RMD; |
| 4962 | |
| 4963 | // some PUSHes are reused by different calls on other branches, |
| 4964 | // but that can't happen if we didn't branch, so they |
| 4965 | // can be removed from future searches (handles nested calls) |
| 4966 | if (!may_reuse) |
| 4967 | ops[j].flags |= OPF_FARGNR; |
| 4968 | |
| 4969 | ops[j].flags |= OPF_FARG; |
| 4970 | ops[j].flags &= ~OPF_RSAVE; |
| 4971 | |
| 4972 | // check for __VALIST |
| 4973 | if (!pp->is_unresolved && g_func_pp != NULL |
| 4974 | && pp->arg[arg].type.is_va_list) |
| 4975 | { |
| 4976 | k = -1; |
| 4977 | ret = resolve_origin(j, &ops[j].operand[0], |
| 4978 | magic + 1, &k, NULL); |
| 4979 | if (ret == 1 && k >= 0) |
| 4980 | { |
| 4981 | if (ops[k].op == OP_LEA) { |
| 4982 | if (!g_func_pp->is_vararg) |
| 4983 | ferr(&ops[k], "lea <arg> used, but %s is not vararg?\n", |
| 4984 | g_func_pp->name); |
| 4985 | |
| 4986 | snprintf(buf, sizeof(buf), "arg_%X", |
| 4987 | g_func_pp->argc_stack * 4); |
| 4988 | if (strstr(ops[k].operand[1].name, buf) |
| 4989 | || strstr(ops[k].operand[1].name, "arglist")) |
| 4990 | { |
| 4991 | ops[k].flags |= OPF_RMD | OPF_NOREGS | OPF_DONE; |
| 4992 | ops[j].flags |= OPF_RMD | OPF_NOREGS | OPF_VAPUSH; |
| 4993 | pp->arg[arg].is_saved = 0; |
| 4994 | reg = -1; |
| 4995 | } |
| 4996 | else |
| 4997 | ferr(&ops[k], "va_list arg detection failed\n"); |
| 4998 | } |
| 4999 | // check for va_list from g_func_pp arg too |
| 5000 | else if (ops[k].op == OP_MOV |
| 5001 | && is_stack_access(&ops[k], &ops[k].operand[1])) |
| 5002 | { |
| 5003 | ret = stack_frame_access(&ops[k], &ops[k].operand[1], |
| 5004 | buf, sizeof(buf), ops[k].operand[1].name, "", 1, 0); |
| 5005 | if (ret >= 0) { |
| 5006 | ops[k].flags |= OPF_RMD | OPF_DONE; |
| 5007 | ops[j].flags |= OPF_RMD; |
| 5008 | ops[j].p_argpass = ret + 1; |
| 5009 | pp->arg[arg].is_saved = 0; |
| 5010 | reg = -1; |
| 5011 | } |
| 5012 | } |
| 5013 | } |
| 5014 | } |
| 5015 | |
| 5016 | if (pp->arg[arg].is_saved) { |
| 5017 | ops[j].flags &= ~OPF_RMD; |
| 5018 | ops[j].p_argnum = argnum; |
| 5019 | } |
| 5020 | |
| 5021 | // tracking reg usage |
| 5022 | if (reg >= 0) |
| 5023 | *regmask |= 1 << reg; |
| 5024 | |
| 5025 | arg++; |
| 5026 | argnum++; |
| 5027 | if (!pp->is_unresolved) { |
| 5028 | // next arg |
| 5029 | for (; arg < pp->argc; arg++, argnum++) |
| 5030 | if (pp->arg[arg].reg == NULL) |
| 5031 | break; |
| 5032 | } |
| 5033 | magic = (magic & 0xffffff) | (arg << 24); |
| 5034 | } |
| 5035 | |
| 5036 | if (ops[j].p_arggrp > arg_grp_current) { |
| 5037 | save_args_seen = 0; |
| 5038 | arg_grp_current = ops[j].p_arggrp; |
| 5039 | } |
| 5040 | if (ops[j].p_argnum > 0) |
| 5041 | save_args_seen |= 1 << (ops[j].p_argnum - 1); |
| 5042 | } |
| 5043 | |
| 5044 | if (arg < pp->argc) { |
| 5045 | ferr(po, "arg collect failed for '%s': %d/%d\n", |
| 5046 | pp->name, arg, pp->argc); |
| 5047 | return -1; |
| 5048 | } |
| 5049 | |
| 5050 | if (arg_grp_current > *arg_grp) |
| 5051 | *arg_grp = arg_grp_current; |
| 5052 | |
| 5053 | return arg; |
| 5054 | } |
| 5055 | |
| 5056 | static int collect_call_args(struct parsed_op *po, int i, |
| 5057 | struct parsed_proto *pp, int *regmask, int magic) |
| 5058 | { |
| 5059 | // arg group is for cases when pushes for |
| 5060 | // multiple funcs are going on |
| 5061 | struct parsed_op *po_tmp; |
| 5062 | int arg_grp = 0; |
| 5063 | int ret; |
| 5064 | int a; |
| 5065 | |
| 5066 | ret = collect_call_args_r(po, i, pp, regmask, &arg_grp, |
| 5067 | 0, 1, magic, 0, 0); |
| 5068 | if (ret < 0) |
| 5069 | return ret; |
| 5070 | |
| 5071 | if (arg_grp != 0) { |
| 5072 | // propagate arg_grp |
| 5073 | for (a = 0; a < pp->argc; a++) { |
| 5074 | if (pp->arg[a].reg != NULL) |
| 5075 | continue; |
| 5076 | |
| 5077 | po_tmp = pp->arg[a].datap; |
| 5078 | while (po_tmp != NULL) { |
| 5079 | po_tmp->p_arggrp = arg_grp; |
| 5080 | po_tmp = po_tmp->p_argnext >= 0 ? &ops[po_tmp->p_argnext] : NULL; |
| 5081 | } |
| 5082 | } |
| 5083 | } |
| 5084 | |
| 5085 | if (pp->is_unresolved) { |
| 5086 | pp->argc += ret; |
| 5087 | pp->argc_stack += ret; |
| 5088 | for (a = 0; a < pp->argc; a++) |
| 5089 | if (pp->arg[a].type.name == NULL) |
| 5090 | pp->arg[a].type.name = strdup("int"); |
| 5091 | } |
| 5092 | |
| 5093 | return ret; |
| 5094 | } |
| 5095 | |
| 5096 | static void reg_use_pass(int i, int opcnt, unsigned char *cbits, |
| 5097 | int regmask_now, int *regmask, |
| 5098 | int regmask_save_now, int *regmask_save, |
| 5099 | int *regmask_init, int regmask_arg) |
| 5100 | { |
| 5101 | struct parsed_op *po; |
| 5102 | int already_saved; |
| 5103 | int regmask_new; |
| 5104 | int regmask_op; |
| 5105 | int flags_set; |
| 5106 | int ret, reg; |
| 5107 | int j; |
| 5108 | |
| 5109 | for (; i < opcnt; i++) |
| 5110 | { |
| 5111 | po = &ops[i]; |
| 5112 | if (cbits[i >> 3] & (1 << (i & 7))) |
| 5113 | return; |
| 5114 | cbits[i >> 3] |= (1 << (i & 7)); |
| 5115 | |
| 5116 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
| 5117 | if (po->flags & (OPF_RMD|OPF_DONE)) |
| 5118 | continue; |
| 5119 | if (po->btj != NULL) { |
| 5120 | for (j = 0; j < po->btj->count; j++) { |
| 5121 | check_i(po, po->btj->d[j].bt_i); |
| 5122 | reg_use_pass(po->btj->d[j].bt_i, opcnt, cbits, |
| 5123 | regmask_now, regmask, regmask_save_now, regmask_save, |
| 5124 | regmask_init, regmask_arg); |
| 5125 | } |
| 5126 | return; |
| 5127 | } |
| 5128 | |
| 5129 | check_i(po, po->bt_i); |
| 5130 | if (po->flags & OPF_CJMP) |
| 5131 | reg_use_pass(po->bt_i, opcnt, cbits, |
| 5132 | regmask_now, regmask, regmask_save_now, regmask_save, |
| 5133 | regmask_init, regmask_arg); |
| 5134 | else |
| 5135 | i = po->bt_i - 1; |
| 5136 | continue; |
| 5137 | } |
| 5138 | |
| 5139 | if (po->op == OP_PUSH && !(po->flags & (OPF_FARG|OPF_DONE)) |
| 5140 | && !g_func_pp->is_userstack |
| 5141 | && po->operand[0].type == OPT_REG) |
| 5142 | { |
| 5143 | reg = po->operand[0].reg; |
| 5144 | ferr_assert(po, reg >= 0); |
| 5145 | |
| 5146 | already_saved = 0; |
| 5147 | flags_set = OPF_RSAVE | OPF_RMD | OPF_DONE; |
| 5148 | if (regmask_now & (1 << reg)) { |
| 5149 | already_saved = regmask_save_now & (1 << reg); |
| 5150 | flags_set = OPF_RSAVE | OPF_DONE; |
| 5151 | } |
| 5152 | |
| 5153 | ret = scan_for_pop(i + 1, opcnt, i + opcnt * 3, reg, 0, 0, 0); |
| 5154 | if (ret == 1) { |
| 5155 | scan_for_pop(i + 1, opcnt, i + opcnt * 4, |
| 5156 | reg, 0, 0, flags_set); |
| 5157 | } |
| 5158 | else { |
| 5159 | ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, 0); |
| 5160 | if (ret == 1) { |
| 5161 | scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, |
| 5162 | flags_set); |
| 5163 | } |
| 5164 | } |
| 5165 | if (ret == 1) { |
| 5166 | ferr_assert(po, !already_saved); |
| 5167 | po->flags |= flags_set; |
| 5168 | |
| 5169 | if (regmask_now & (1 << reg)) { |
| 5170 | regmask_save_now |= (1 << reg); |
| 5171 | *regmask_save |= regmask_save_now; |
| 5172 | } |
| 5173 | continue; |
| 5174 | } |
| 5175 | } |
| 5176 | else if (po->op == OP_POP && (po->flags & OPF_RSAVE)) { |
| 5177 | reg = po->operand[0].reg; |
| 5178 | ferr_assert(po, reg >= 0); |
| 5179 | |
| 5180 | if (regmask_save_now & (1 << reg)) |
| 5181 | regmask_save_now &= ~(1 << reg); |
| 5182 | else |
| 5183 | regmask_now &= ~(1 << reg); |
| 5184 | continue; |
| 5185 | } |
| 5186 | else if (po->op == OP_CALL) { |
| 5187 | if ((po->regmask_dst & (1 << xAX)) |
| 5188 | && !(po->regmask_dst & (1 << xDX))) |
| 5189 | { |
| 5190 | if (po->flags & OPF_TAIL) |
| 5191 | // don't need eax, will do "return f();" or "f(); return;" |
| 5192 | po->regmask_dst &= ~(1 << xAX); |
| 5193 | else { |
| 5194 | struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, xAX); |
| 5195 | j = -1; |
| 5196 | find_next_read(i + 1, opcnt, &opr, i + opcnt * 17, &j); |
| 5197 | if (j == -1) |
| 5198 | // not used |
| 5199 | po->regmask_dst &= ~(1 << xAX); |
| 5200 | } |
| 5201 | } |
| 5202 | |
| 5203 | // not "full stack" mode and have something in stack |
| 5204 | if (!(regmask_now & mxST7_2) && (regmask_now & mxST1_0)) |
| 5205 | ferr(po, "float stack is not empty on func call\n"); |
| 5206 | } |
| 5207 | |
| 5208 | if (po->flags & OPF_NOREGS) |
| 5209 | continue; |
| 5210 | |
| 5211 | // if incomplete register is used, clear it on init to avoid |
| 5212 | // later use of uninitialized upper part in some situations |
| 5213 | if ((po->flags & OPF_DATA) && po->operand[0].type == OPT_REG |
| 5214 | && po->operand[0].lmod != OPLM_DWORD) |
| 5215 | { |
| 5216 | reg = po->operand[0].reg; |
| 5217 | ferr_assert(po, reg >= 0); |
| 5218 | |
| 5219 | if (!(regmask_now & (1 << reg))) |
| 5220 | *regmask_init |= 1 << reg; |
| 5221 | } |
| 5222 | |
| 5223 | regmask_op = po->regmask_src | po->regmask_dst; |
| 5224 | |
| 5225 | regmask_new = po->regmask_src & ~regmask_now & ~regmask_arg; |
| 5226 | regmask_new &= ~(1 << xSP); |
| 5227 | if (g_bp_frame && !(po->flags & OPF_EBP_S)) |
| 5228 | regmask_new &= ~(1 << xBP); |
| 5229 | |
| 5230 | if (regmask_new != 0) |
| 5231 | fnote(po, "uninitialized reg mask: %x\n", regmask_new); |
| 5232 | |
| 5233 | if (regmask_op & (1 << xBP)) { |
| 5234 | if (g_bp_frame && !(po->flags & OPF_EBP_S)) { |
| 5235 | if (po->regmask_dst & (1 << xBP)) |
| 5236 | // compiler decided to drop bp frame and use ebp as scratch |
| 5237 | scan_fwd_set_flags(i + 1, opcnt, i + opcnt * 5, OPF_EBP_S); |
| 5238 | else |
| 5239 | regmask_op &= ~(1 << xBP); |
| 5240 | } |
| 5241 | } |
| 5242 | |
| 5243 | if (po->flags & OPF_FPUSH) { |
| 5244 | if (regmask_now & mxST1) |
| 5245 | regmask_now |= mxSTa; // switch to "full stack" mode |
| 5246 | if (regmask_now & mxSTa) |
| 5247 | po->flags |= OPF_FSHIFT; |
| 5248 | if (!(regmask_now & mxST7_2)) { |
| 5249 | regmask_now = |
| 5250 | (regmask_now & ~mxST1_0) | ((regmask_now & mxST0) << 1); |
| 5251 | } |
| 5252 | } |
| 5253 | |
| 5254 | regmask_now |= regmask_op; |
| 5255 | *regmask |= regmask_now; |
| 5256 | |
| 5257 | // released regs |
| 5258 | if (po->flags & OPF_FPOP) { |
| 5259 | if ((regmask_now & mxSTa) == 0) |
| 5260 | ferr(po, "float pop on empty stack?\n"); |
| 5261 | if (regmask_now & (mxST7_2 | mxST1)) |
| 5262 | po->flags |= OPF_FSHIFT; |
| 5263 | if (!(regmask_now & mxST7_2)) { |
| 5264 | regmask_now = |
| 5265 | (regmask_now & ~mxST1_0) | ((regmask_now & mxST1) >> 1); |
| 5266 | } |
| 5267 | } |
| 5268 | |
| 5269 | if (po->flags & OPF_TAIL) { |
| 5270 | if (!(regmask_now & mxST7_2)) { |
| 5271 | if (get_pp_arg_regmask_dst(g_func_pp) & mxST0) { |
| 5272 | if (!(regmask_now & mxST0)) |
| 5273 | ferr(po, "no st0 on float return, mask: %x\n", |
| 5274 | regmask_now); |
| 5275 | } |
| 5276 | else if (regmask_now & mxST1_0) |
| 5277 | ferr(po, "float regs on tail: %x\n", regmask_now); |
| 5278 | } |
| 5279 | |
| 5280 | // there is support for "conditional tailcall", sort of |
| 5281 | if (!(po->flags & OPF_CC)) |
| 5282 | return; |
| 5283 | } |
| 5284 | } |
| 5285 | } |
| 5286 | |
| 5287 | static void pp_insert_reg_arg(struct parsed_proto *pp, const char *reg) |
| 5288 | { |
| 5289 | int i; |
| 5290 | |
| 5291 | for (i = 0; i < pp->argc; i++) |
| 5292 | if (pp->arg[i].reg == NULL) |
| 5293 | break; |
| 5294 | |
| 5295 | if (pp->argc_stack) |
| 5296 | memmove(&pp->arg[i + 1], &pp->arg[i], |
| 5297 | sizeof(pp->arg[0]) * pp->argc_stack); |
| 5298 | memset(&pp->arg[i], 0, sizeof(pp->arg[i])); |
| 5299 | pp->arg[i].reg = strdup(reg); |
| 5300 | pp->arg[i].type.name = strdup("int"); |
| 5301 | pp->argc++; |
| 5302 | pp->argc_reg++; |
| 5303 | } |
| 5304 | |
| 5305 | static void output_std_flags(FILE *fout, struct parsed_op *po, |
| 5306 | int *pfomask, const char *dst_opr_text) |
| 5307 | { |
| 5308 | if (*pfomask & (1 << PFO_Z)) { |
| 5309 | fprintf(fout, "\n cond_z = (%s%s == 0);", |
| 5310 | lmod_cast_u(po, po->operand[0].lmod), dst_opr_text); |
| 5311 | *pfomask &= ~(1 << PFO_Z); |
| 5312 | } |
| 5313 | if (*pfomask & (1 << PFO_S)) { |
| 5314 | fprintf(fout, "\n cond_s = (%s%s < 0);", |
| 5315 | lmod_cast_s(po, po->operand[0].lmod), dst_opr_text); |
| 5316 | *pfomask &= ~(1 << PFO_S); |
| 5317 | } |
| 5318 | } |
| 5319 | |
| 5320 | enum { |
| 5321 | OPP_FORCE_NORETURN = (1 << 0), |
| 5322 | OPP_SIMPLE_ARGS = (1 << 1), |
| 5323 | OPP_ALIGN = (1 << 2), |
| 5324 | }; |
| 5325 | |
| 5326 | static void output_pp_attrs(FILE *fout, const struct parsed_proto *pp, |
| 5327 | int flags) |
| 5328 | { |
| 5329 | const char *cconv = ""; |
| 5330 | |
| 5331 | if (pp->is_fastcall) |
| 5332 | cconv = "__fastcall "; |
| 5333 | else if (pp->is_stdcall && pp->argc_reg == 0) |
| 5334 | cconv = "__stdcall "; |
| 5335 | |
| 5336 | fprintf(fout, (flags & OPP_ALIGN) ? "%-16s" : "%s", cconv); |
| 5337 | |
| 5338 | if (pp->is_noreturn || (flags & OPP_FORCE_NORETURN)) |
| 5339 | fprintf(fout, "noreturn "); |
| 5340 | } |
| 5341 | |
| 5342 | static void output_pp(FILE *fout, const struct parsed_proto *pp, |
| 5343 | int flags) |
| 5344 | { |
| 5345 | int i; |
| 5346 | |
| 5347 | fprintf(fout, (flags & OPP_ALIGN) ? "%-5s" : "%s ", |
| 5348 | pp->ret_type.name); |
| 5349 | if (pp->is_fptr) |
| 5350 | fprintf(fout, "("); |
| 5351 | output_pp_attrs(fout, pp, flags); |
| 5352 | if (pp->is_fptr) |
| 5353 | fprintf(fout, "*"); |
| 5354 | fprintf(fout, "%s", pp->name); |
| 5355 | if (pp->is_fptr) |
| 5356 | fprintf(fout, ")"); |
| 5357 | |
| 5358 | fprintf(fout, "("); |
| 5359 | for (i = 0; i < pp->argc; i++) { |
| 5360 | if (i > 0) |
| 5361 | fprintf(fout, ", "); |
| 5362 | if (pp->arg[i].pp != NULL && pp->arg[i].pp->is_func |
| 5363 | && !(flags & OPP_SIMPLE_ARGS)) |
| 5364 | { |
| 5365 | // func pointer |
| 5366 | output_pp(fout, pp->arg[i].pp, 0); |
| 5367 | } |
| 5368 | else if (pp->arg[i].type.is_retreg) { |
| 5369 | fprintf(fout, "u32 *r_%s", pp->arg[i].reg); |
| 5370 | } |
| 5371 | else { |
| 5372 | fprintf(fout, "%s", pp->arg[i].type.name); |
| 5373 | if (!pp->is_fptr) |
| 5374 | fprintf(fout, " a%d", i + 1); |
| 5375 | } |
| 5376 | } |
| 5377 | if (pp->is_vararg) { |
| 5378 | if (i > 0) |
| 5379 | fprintf(fout, ", "); |
| 5380 | fprintf(fout, "..."); |
| 5381 | } |
| 5382 | fprintf(fout, ")"); |
| 5383 | } |
| 5384 | |
| 5385 | static char *saved_arg_name(char *buf, size_t buf_size, int grp, int num) |
| 5386 | { |
| 5387 | char buf1[16]; |
| 5388 | |
| 5389 | buf1[0] = 0; |
| 5390 | if (grp > 0) |
| 5391 | snprintf(buf1, sizeof(buf1), "%d", grp); |
| 5392 | snprintf(buf, buf_size, "s%s_a%d", buf1, num); |
| 5393 | |
| 5394 | return buf; |
| 5395 | } |
| 5396 | |
| 5397 | static void gen_x_cleanup(int opcnt); |
| 5398 | |
| 5399 | static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) |
| 5400 | { |
| 5401 | struct parsed_op *po, *delayed_flag_op = NULL, *tmp_op; |
| 5402 | struct parsed_opr *last_arith_dst = NULL; |
| 5403 | char buf1[256], buf2[256], buf3[256], cast[64]; |
| 5404 | struct parsed_proto *pp, *pp_tmp; |
| 5405 | struct parsed_data *pd; |
| 5406 | int save_arg_vars[MAX_ARG_GRP] = { 0, }; |
| 5407 | unsigned char cbits[MAX_OPS / 8]; |
| 5408 | const char *float_type; |
| 5409 | const char *float_st0; |
| 5410 | const char *float_st1; |
| 5411 | int need_float_stack = 0; |
| 5412 | int need_float_sw = 0; // status word |
| 5413 | int need_tmp_var = 0; |
| 5414 | int need_tmp64 = 0; |
| 5415 | int cond_vars = 0; |
| 5416 | int had_decl = 0; |
| 5417 | int label_pending = 0; |
| 5418 | int need_double = 0; |
| 5419 | int regmask_save = 0; // used regs saved/restored in this func |
| 5420 | int regmask_arg; // regs from this function args (fastcall, etc) |
| 5421 | int regmask_ret; // regs needed on ret |
| 5422 | int regmask_now; // temp |
| 5423 | int regmask_init = 0; // regs that need zero initialization |
| 5424 | int regmask_pp = 0; // regs used in complex push-pop graph |
| 5425 | int regmask_ffca = 0; // float function call args |
| 5426 | int regmask = 0; // used regs |
| 5427 | int pfomask = 0; |
| 5428 | int found = 0; |
| 5429 | int dead_dst; |
| 5430 | int no_output; |
| 5431 | int i, j, l; |
| 5432 | int arg; |
| 5433 | int reg; |
| 5434 | int ret; |
| 5435 | |
| 5436 | g_bp_frame = g_sp_frame = g_stack_fsz = 0; |
| 5437 | g_stack_frame_used = 0; |
| 5438 | if (g_sct_func_attr & SCTFA_CLEAR_REGS) |
| 5439 | regmask_init = g_regmask_init; |
| 5440 | |
| 5441 | g_func_pp = proto_parse(fhdr, funcn, 0); |
| 5442 | if (g_func_pp == NULL) |
| 5443 | ferr(ops, "proto_parse failed for '%s'\n", funcn); |
| 5444 | |
| 5445 | regmask_arg = get_pp_arg_regmask_src(g_func_pp); |
| 5446 | regmask_ret = get_pp_arg_regmask_dst(g_func_pp); |
| 5447 | |
| 5448 | // pass1: |
| 5449 | // - resolve all branches |
| 5450 | // - parse calls with labels |
| 5451 | resolve_branches_parse_calls(opcnt); |
| 5452 | |
| 5453 | // pass2: |
| 5454 | // - handle ebp/esp frame, remove ops related to it |
| 5455 | scan_prologue_epilogue(opcnt); |
| 5456 | |
| 5457 | // pass3: |
| 5458 | // - remove dead labels |
| 5459 | // - set regs needed at ret |
| 5460 | for (i = 0; i < opcnt; i++) |
| 5461 | { |
| 5462 | if (g_labels[i] != NULL && g_label_refs[i].i == -1) { |
| 5463 | free(g_labels[i]); |
| 5464 | g_labels[i] = NULL; |
| 5465 | } |
| 5466 | |
| 5467 | if (ops[i].op == OP_RET) |
| 5468 | ops[i].regmask_src |= regmask_ret; |
| 5469 | } |
| 5470 | |
| 5471 | // pass4: |
| 5472 | // - process trivial calls |
| 5473 | for (i = 0; i < opcnt; i++) |
| 5474 | { |
| 5475 | po = &ops[i]; |
| 5476 | if (po->flags & (OPF_RMD|OPF_DONE)) |
| 5477 | continue; |
| 5478 | |
| 5479 | if (po->op == OP_CALL) |
| 5480 | { |
| 5481 | pp = process_call_early(i, opcnt, &j); |
| 5482 | if (pp != NULL) { |
| 5483 | if (!(po->flags & OPF_ATAIL)) { |
| 5484 | // since we know the args, try to collect them |
| 5485 | ret = collect_call_args_early(i, pp, ®mask, ®mask_ffca); |
| 5486 | if (ret != 0) |
| 5487 | pp = NULL; |
| 5488 | } |
| 5489 | } |
| 5490 | |
| 5491 | if (pp != NULL) { |
| 5492 | if (j >= 0) { |
| 5493 | // commit esp adjust |
| 5494 | if (ops[j].op != OP_POP) |
| 5495 | patch_esp_adjust(&ops[j], pp->argc_stack * 4); |
| 5496 | else { |
| 5497 | for (l = 0; l < pp->argc_stack; l++) |
| 5498 | ops[j + l].flags |= OPF_DONE | OPF_RMD | OPF_NOREGS; |
| 5499 | } |
| 5500 | } |
| 5501 | |
| 5502 | if (strstr(pp->ret_type.name, "int64")) |
| 5503 | need_tmp64 = 1; |
| 5504 | |
| 5505 | po->flags |= OPF_DONE; |
| 5506 | } |
| 5507 | } |
| 5508 | } |
| 5509 | |
| 5510 | // pass5: |
| 5511 | // - process calls, stage 2 |
| 5512 | // - handle some push/pop pairs |
| 5513 | // - scan for STD/CLD, propagate DF |
| 5514 | // - try to resolve needed x87 status word bits |
| 5515 | for (i = 0; i < opcnt; i++) |
| 5516 | { |
| 5517 | int mask, z_check; |
| 5518 | |
| 5519 | po = &ops[i]; |
| 5520 | if (po->flags & OPF_RMD) |
| 5521 | continue; |
| 5522 | |
| 5523 | if (po->op == OP_CALL) |
| 5524 | { |
| 5525 | if (!(po->flags & OPF_DONE)) { |
| 5526 | pp = process_call(i, opcnt); |
| 5527 | |
| 5528 | if (!pp->is_unresolved && !(po->flags & OPF_ATAIL)) { |
| 5529 | // since we know the args, collect them |
| 5530 | collect_call_args(po, i, pp, ®mask, i + opcnt * 2); |
| 5531 | } |
| 5532 | // for unresolved, collect after other passes |
| 5533 | } |
| 5534 | |
| 5535 | pp = po->pp; |
| 5536 | ferr_assert(po, pp != NULL); |
| 5537 | |
| 5538 | po->regmask_src |= get_pp_arg_regmask_src(pp); |
| 5539 | po->regmask_dst |= get_pp_arg_regmask_dst(pp); |
| 5540 | |
| 5541 | if (po->regmask_dst & mxST0) |
| 5542 | po->flags |= OPF_FPUSH; |
| 5543 | |
| 5544 | if (strstr(pp->ret_type.name, "int64")) |
| 5545 | need_tmp64 = 1; |
| 5546 | |
| 5547 | continue; |
| 5548 | } |
| 5549 | |
| 5550 | if (po->flags & OPF_DONE) |
| 5551 | continue; |
| 5552 | |
| 5553 | switch (po->op) { |
| 5554 | case OP_PUSH: |
| 5555 | if (!(po->flags & OPF_FARG) && !(po->flags & OPF_RSAVE) |
| 5556 | && po->operand[0].type == OPT_CONST) |
| 5557 | { |
| 5558 | scan_for_pop_const(i, opcnt, i + opcnt * 12); |
| 5559 | } |
| 5560 | break; |
| 5561 | |
| 5562 | case OP_POP: |
| 5563 | scan_pushes_for_pop(i, opcnt, ®mask_pp); |
| 5564 | break; |
| 5565 | |
| 5566 | case OP_STD: |
| 5567 | po->flags |= OPF_DF | OPF_RMD | OPF_DONE; |
| 5568 | scan_propagate_df(i + 1, opcnt); |
| 5569 | break; |
| 5570 | |
| 5571 | case OP_FNSTSW: |
| 5572 | need_float_sw = 1; |
| 5573 | if (po->operand[0].type != OPT_REG || po->operand[0].reg != xAX) |
| 5574 | ferr(po, "TODO: fnstsw to mem\n"); |
| 5575 | ret = resolve_used_bits(i + 1, opcnt, xAX, &mask, &z_check); |
| 5576 | if (ret != 0) |
| 5577 | ferr(po, "fnstsw resolve failed\n"); |
| 5578 | ret = adjust_prev_op(i, OP_FCOM, i + opcnt * 21, |
| 5579 | (void *)(long)(mask | (z_check << 16))); |
| 5580 | if (ret != 1) |
| 5581 | ferr(po, "failed to find fcom: %d\n", ret); |
| 5582 | break; |
| 5583 | |
| 5584 | default: |
| 5585 | break; |
| 5586 | } |
| 5587 | } |
| 5588 | |
| 5589 | // pass6: |
| 5590 | // - find POPs for PUSHes, rm both |
| 5591 | // - scan for all used registers |
| 5592 | memset(cbits, 0, sizeof(cbits)); |
| 5593 | reg_use_pass(0, opcnt, cbits, regmask_init, ®mask, |
| 5594 | 0, ®mask_save, ®mask_init, regmask_arg); |
| 5595 | |
| 5596 | need_float_stack = !!(regmask & mxST7_2); |
| 5597 | |
| 5598 | // pass7: |
| 5599 | // - find flag set ops for their users |
| 5600 | // - do unresolved calls |
| 5601 | // - declare indirect functions |
| 5602 | // - other op specific processing |
| 5603 | for (i = 0; i < opcnt; i++) |
| 5604 | { |
| 5605 | po = &ops[i]; |
| 5606 | if (po->flags & (OPF_RMD|OPF_DONE)) |
| 5607 | continue; |
| 5608 | |
| 5609 | if (po->flags & OPF_CC) |
| 5610 | { |
| 5611 | int setters[16], cnt = 0, branched = 0; |
| 5612 | |
| 5613 | ret = scan_for_flag_set(i, opcnt, i + opcnt * 6, |
| 5614 | &branched, setters, &cnt); |
| 5615 | if (ret < 0 || cnt <= 0) |
| 5616 | ferr(po, "unable to trace flag setter(s)\n"); |
| 5617 | if (cnt > ARRAY_SIZE(setters)) |
| 5618 | ferr(po, "too many flag setters\n"); |
| 5619 | |
| 5620 | for (j = 0; j < cnt; j++) |
| 5621 | { |
| 5622 | tmp_op = &ops[setters[j]]; // flag setter |
| 5623 | pfomask = 0; |
| 5624 | |
| 5625 | // to get nicer code, we try to delay test and cmp; |
| 5626 | // if we can't because of operand modification, or if we |
| 5627 | // have arith op, or branch, make it calculate flags explicitly |
| 5628 | if (tmp_op->op == OP_TEST || tmp_op->op == OP_CMP) |
| 5629 | { |
| 5630 | if (branched || scan_for_mod(tmp_op, setters[j] + 1, i, 0) >= 0) |
| 5631 | pfomask = 1 << po->pfo; |
| 5632 | } |
| 5633 | else if (tmp_op->op == OP_CMPS || tmp_op->op == OP_SCAS) { |
| 5634 | pfomask = 1 << po->pfo; |
| 5635 | } |
| 5636 | else { |
| 5637 | // see if we'll be able to handle based on op result |
| 5638 | if ((tmp_op->op != OP_AND && tmp_op->op != OP_OR |
| 5639 | && po->pfo != PFO_Z && po->pfo != PFO_S |
| 5640 | && po->pfo != PFO_P) |
| 5641 | || branched |
| 5642 | || scan_for_mod_opr0(tmp_op, setters[j] + 1, i) >= 0) |
| 5643 | { |
| 5644 | pfomask = 1 << po->pfo; |
| 5645 | } |
| 5646 | |
| 5647 | if (tmp_op->op == OP_ADD && po->pfo == PFO_C) { |
| 5648 | propagate_lmod(tmp_op, &tmp_op->operand[0], |
| 5649 | &tmp_op->operand[1]); |
| 5650 | if (tmp_op->operand[0].lmod == OPLM_DWORD) |
| 5651 | need_tmp64 = 1; |
| 5652 | } |
| 5653 | } |
| 5654 | if (pfomask) { |
| 5655 | tmp_op->pfomask |= pfomask; |
| 5656 | cond_vars |= pfomask; |
| 5657 | } |
| 5658 | // note: may overwrite, currently not a problem |
| 5659 | po->datap = tmp_op; |
| 5660 | } |
| 5661 | |
| 5662 | if (po->op == OP_RCL || po->op == OP_RCR |
| 5663 | || po->op == OP_ADC || po->op == OP_SBB) |
| 5664 | cond_vars |= 1 << PFO_C; |
| 5665 | } |
| 5666 | |
| 5667 | switch (po->op) { |
| 5668 | case OP_CMPS: |
| 5669 | case OP_SCAS: |
| 5670 | cond_vars |= 1 << PFO_Z; |
| 5671 | break; |
| 5672 | |
| 5673 | case OP_MUL: |
| 5674 | if (po->operand[0].lmod == OPLM_DWORD) |
| 5675 | need_tmp64 = 1; |
| 5676 | break; |
| 5677 | |
| 5678 | case OP_IMUL: |
| 5679 | if (po->operand_cnt == 1 && po->operand[0].lmod == OPLM_DWORD) |
| 5680 | need_tmp64 = 1; |
| 5681 | break; |
| 5682 | |
| 5683 | case OP_CALL: |
| 5684 | // note: resolved non-reg calls are OPF_DONE already |
| 5685 | pp = po->pp; |
| 5686 | ferr_assert(po, pp != NULL); |
| 5687 | |
| 5688 | if (pp->is_unresolved) { |
| 5689 | int regmask_stack = 0; |
| 5690 | collect_call_args(po, i, pp, ®mask, i + opcnt * 2); |
| 5691 | |
| 5692 | // this is pretty rough guess: |
| 5693 | // see ecx and edx were pushed (and not their saved versions) |
| 5694 | for (arg = 0; arg < pp->argc; arg++) { |
| 5695 | if (pp->arg[arg].reg != NULL && !pp->arg[arg].is_saved) |
| 5696 | continue; |
| 5697 | |
| 5698 | tmp_op = pp->arg[arg].datap; |
| 5699 | if (tmp_op == NULL) |
| 5700 | ferr(po, "parsed_op missing for arg%d\n", arg); |
| 5701 | if (tmp_op->operand[0].type == OPT_REG) |
| 5702 | regmask_stack |= 1 << tmp_op->operand[0].reg; |
| 5703 | } |
| 5704 | |
| 5705 | if (!((regmask_stack & (1 << xCX)) |
| 5706 | && (regmask_stack & (1 << xDX)))) |
| 5707 | { |
| 5708 | if (pp->argc_stack != 0 |
| 5709 | || ((regmask | regmask_arg) & ((1 << xCX)|(1 << xDX)))) |
| 5710 | { |
| 5711 | pp_insert_reg_arg(pp, "ecx"); |
| 5712 | pp->is_fastcall = 1; |
| 5713 | regmask_init |= 1 << xCX; |
| 5714 | regmask |= 1 << xCX; |
| 5715 | } |
| 5716 | if (pp->argc_stack != 0 |
| 5717 | || ((regmask | regmask_arg) & (1 << xDX))) |
| 5718 | { |
| 5719 | pp_insert_reg_arg(pp, "edx"); |
| 5720 | regmask_init |= 1 << xDX; |
| 5721 | regmask |= 1 << xDX; |
| 5722 | } |
| 5723 | } |
| 5724 | |
| 5725 | // note: __cdecl doesn't fall into is_unresolved category |
| 5726 | if (pp->argc_stack > 0) |
| 5727 | pp->is_stdcall = 1; |
| 5728 | } |
| 5729 | break; |
| 5730 | |
| 5731 | case OP_MOV: |
| 5732 | if (po->operand[0].pp != NULL && po->operand[1].pp != NULL) |
| 5733 | { |
| 5734 | // <var> = offset <something> |
| 5735 | if ((po->operand[1].pp->is_func || po->operand[1].pp->is_fptr) |
| 5736 | && !IS_START(po->operand[1].name, "off_")) |
| 5737 | { |
| 5738 | if (!po->operand[0].pp->is_fptr) |
| 5739 | ferr(po, "%s not declared as fptr when it should be\n", |
| 5740 | po->operand[0].name); |
| 5741 | if (pp_cmp_func(po->operand[0].pp, po->operand[1].pp)) { |
| 5742 | pp_print(buf1, sizeof(buf1), po->operand[0].pp); |
| 5743 | pp_print(buf2, sizeof(buf2), po->operand[1].pp); |
| 5744 | fnote(po, "var: %s\n", buf1); |
| 5745 | fnote(po, "func: %s\n", buf2); |
| 5746 | ferr(po, "^ mismatch\n"); |
| 5747 | } |
| 5748 | } |
| 5749 | } |
| 5750 | break; |
| 5751 | |
| 5752 | case OP_DIV: |
| 5753 | case OP_IDIV: |
| 5754 | if (po->operand[0].lmod == OPLM_DWORD) { |
| 5755 | // 32bit division is common, look for it |
| 5756 | if (po->op == OP_DIV) |
| 5757 | ret = scan_for_reg_clear(i, xDX); |
| 5758 | else |
| 5759 | ret = scan_for_cdq_edx(i); |
| 5760 | if (ret >= 0) |
| 5761 | po->flags |= OPF_32BIT; |
| 5762 | else |
| 5763 | need_tmp64 = 1; |
| 5764 | } |
| 5765 | else |
| 5766 | need_tmp_var = 1; |
| 5767 | break; |
| 5768 | |
| 5769 | case OP_CLD: |
| 5770 | po->flags |= OPF_RMD | OPF_DONE; |
| 5771 | break; |
| 5772 | |
| 5773 | case OP_RCL: |
| 5774 | case OP_RCR: |
| 5775 | case OP_XCHG: |
| 5776 | need_tmp_var = 1; |
| 5777 | break; |
| 5778 | |
| 5779 | case OP_FLD: |
| 5780 | if (po->operand[0].lmod == OPLM_QWORD) |
| 5781 | need_double = 1; |
| 5782 | break; |
| 5783 | |
| 5784 | case OPP_ALLSHL: |
| 5785 | case OPP_ALLSHR: |
| 5786 | need_tmp64 = 1; |
| 5787 | break; |
| 5788 | |
| 5789 | case OPP_FTOL: { |
| 5790 | struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, xDX); |
| 5791 | j = -1; |
| 5792 | find_next_read(i + 1, opcnt, &opr, i + opcnt * 18, &j); |
| 5793 | if (j == -1) |
| 5794 | po->flags |= OPF_32BIT; |
| 5795 | break; |
| 5796 | } |
| 5797 | |
| 5798 | default: |
| 5799 | break; |
| 5800 | } |
| 5801 | |
| 5802 | // this might need it's own pass... |
| 5803 | if (po->op != OP_FST && po->p_argnum > 0) |
| 5804 | save_arg_vars[po->p_arggrp] |= 1 << (po->p_argnum - 1); |
| 5805 | |
| 5806 | // correct for "full stack" mode late enable |
| 5807 | if ((po->flags & (OPF_PPUSH|OPF_FPOP)) && need_float_stack) |
| 5808 | po->flags |= OPF_FSHIFT; |
| 5809 | } |
| 5810 | |
| 5811 | float_type = need_double ? "double" : "float"; |
| 5812 | float_st0 = need_float_stack ? "f_st[f_stp & 7]" : "f_st0"; |
| 5813 | float_st1 = need_float_stack ? "f_st[(f_stp + 1) & 7]" : "f_st1"; |
| 5814 | |
| 5815 | // output starts here |
| 5816 | |
| 5817 | // define userstack size |
| 5818 | if (g_func_pp->is_userstack) { |
| 5819 | fprintf(fout, "#ifndef US_SZ_%s\n", g_func_pp->name); |
| 5820 | fprintf(fout, "#define US_SZ_%s USERSTACK_SIZE\n", g_func_pp->name); |
| 5821 | fprintf(fout, "#endif\n"); |
| 5822 | } |
| 5823 | |
| 5824 | // the function itself |
| 5825 | ferr_assert(ops, !g_func_pp->is_fptr); |
| 5826 | output_pp(fout, g_func_pp, |
| 5827 | (g_ida_func_attr & IDAFA_NORETURN) ? OPP_FORCE_NORETURN : 0); |
| 5828 | fprintf(fout, "\n{\n"); |
| 5829 | |
| 5830 | // declare indirect functions |
| 5831 | for (i = 0; i < opcnt; i++) { |
| 5832 | po = &ops[i]; |
| 5833 | if (po->flags & OPF_RMD) |
| 5834 | continue; |
| 5835 | |
| 5836 | if (po->op == OP_CALL) { |
| 5837 | pp = po->pp; |
| 5838 | if (pp == NULL) |
| 5839 | ferr(po, "NULL pp\n"); |
| 5840 | |
| 5841 | if (pp->is_fptr && !(pp->name[0] != 0 && pp->is_arg)) { |
| 5842 | if (pp->name[0] != 0) { |
| 5843 | memmove(pp->name + 2, pp->name, strlen(pp->name) + 1); |
| 5844 | memcpy(pp->name, "i_", 2); |
| 5845 | |
| 5846 | // might be declared already |
| 5847 | found = 0; |
| 5848 | for (j = 0; j < i; j++) { |
| 5849 | if (ops[j].op == OP_CALL && (pp_tmp = ops[j].pp)) { |
| 5850 | if (pp_tmp->is_fptr && IS(pp->name, pp_tmp->name)) { |
| 5851 | found = 1; |
| 5852 | break; |
| 5853 | } |
| 5854 | } |
| 5855 | } |
| 5856 | if (found) |
| 5857 | continue; |
| 5858 | } |
| 5859 | else |
| 5860 | snprintf(pp->name, sizeof(pp->name), "icall%d", i); |
| 5861 | |
| 5862 | fprintf(fout, " "); |
| 5863 | output_pp(fout, pp, OPP_SIMPLE_ARGS); |
| 5864 | fprintf(fout, ";\n"); |
| 5865 | } |
| 5866 | } |
| 5867 | } |
| 5868 | |
| 5869 | // output LUTs/jumptables |
| 5870 | for (i = 0; i < g_func_pd_cnt; i++) { |
| 5871 | pd = &g_func_pd[i]; |
| 5872 | fprintf(fout, " static const "); |
| 5873 | if (pd->type == OPT_OFFSET) { |
| 5874 | fprintf(fout, "void *jt_%s[] =\n { ", pd->label); |
| 5875 | |
| 5876 | for (j = 0; j < pd->count; j++) { |
| 5877 | if (j > 0) |
| 5878 | fprintf(fout, ", "); |
| 5879 | fprintf(fout, "&&%s", pd->d[j].u.label); |
| 5880 | } |
| 5881 | } |
| 5882 | else { |
| 5883 | fprintf(fout, "%s %s[] =\n { ", |
| 5884 | lmod_type_u(ops, pd->lmod), pd->label); |
| 5885 | |
| 5886 | for (j = 0; j < pd->count; j++) { |
| 5887 | if (j > 0) |
| 5888 | fprintf(fout, ", "); |
| 5889 | fprintf(fout, "%u", pd->d[j].u.val); |
| 5890 | } |
| 5891 | } |
| 5892 | fprintf(fout, " };\n"); |
| 5893 | had_decl = 1; |
| 5894 | } |
| 5895 | |
| 5896 | // declare stack frame, va_arg |
| 5897 | if (g_stack_fsz) { |
| 5898 | fprintf(fout, " union { u32 d[%d];", (g_stack_fsz + 3) / 4); |
| 5899 | if (g_func_lmods & (1 << OPLM_WORD)) |
| 5900 | fprintf(fout, " u16 w[%d];", (g_stack_fsz + 1) / 2); |
| 5901 | if (g_func_lmods & (1 << OPLM_BYTE)) |
| 5902 | fprintf(fout, " u8 b[%d];", g_stack_fsz); |
| 5903 | if (g_func_lmods & (1 << OPLM_QWORD)) |
| 5904 | fprintf(fout, " double q[%d];", (g_stack_fsz + 7) / 8); |
| 5905 | fprintf(fout, " } sf;\n"); |
| 5906 | had_decl = 1; |
| 5907 | } |
| 5908 | |
| 5909 | if (g_func_pp->is_userstack) { |
| 5910 | fprintf(fout, " u32 fake_sf[US_SZ_%s / 4];\n", g_func_pp->name); |
| 5911 | fprintf(fout, " u32 *esp = &fake_sf[sizeof(fake_sf) / 4];\n"); |
| 5912 | had_decl = 1; |
| 5913 | } |
| 5914 | |
| 5915 | if (g_func_pp->is_vararg) { |
| 5916 | fprintf(fout, " va_list ap;\n"); |
| 5917 | had_decl = 1; |
| 5918 | } |
| 5919 | |
| 5920 | // declare arg-registers |
| 5921 | for (i = 0; i < g_func_pp->argc; i++) { |
| 5922 | if (g_func_pp->arg[i].reg != NULL) { |
| 5923 | reg = char_array_i(regs_r32, |
| 5924 | ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg); |
| 5925 | if (regmask & (1 << reg)) { |
| 5926 | if (g_func_pp->arg[i].type.is_retreg) |
| 5927 | fprintf(fout, " u32 %s = *r_%s;\n", |
| 5928 | g_func_pp->arg[i].reg, g_func_pp->arg[i].reg); |
| 5929 | else |
| 5930 | fprintf(fout, " u32 %s = (u32)a%d;\n", |
| 5931 | g_func_pp->arg[i].reg, i + 1); |
| 5932 | } |
| 5933 | else { |
| 5934 | if (g_func_pp->arg[i].type.is_retreg) |
| 5935 | ferr(ops, "retreg '%s' is unused?\n", |
| 5936 | g_func_pp->arg[i].reg); |
| 5937 | fprintf(fout, " // %s = a%d; // unused\n", |
| 5938 | g_func_pp->arg[i].reg, i + 1); |
| 5939 | } |
| 5940 | had_decl = 1; |
| 5941 | } |
| 5942 | } |
| 5943 | |
| 5944 | // declare normal registers |
| 5945 | regmask_now = regmask & ~regmask_arg; |
| 5946 | regmask_now &= ~(1 << xSP); |
| 5947 | if (regmask_now & 0x00ff) { |
| 5948 | for (reg = 0; reg < 8; reg++) { |
| 5949 | if (regmask_now & (1 << reg)) { |
| 5950 | fprintf(fout, " u32 %s", regs_r32[reg]); |
| 5951 | if (regmask_init & (1 << reg)) |
| 5952 | fprintf(fout, " = 0"); |
| 5953 | fprintf(fout, ";\n"); |
| 5954 | had_decl = 1; |
| 5955 | } |
| 5956 | } |
| 5957 | } |
| 5958 | // ... mmx |
| 5959 | if (regmask_now & 0xff00) { |
| 5960 | for (reg = 8; reg < 16; reg++) { |
| 5961 | if (regmask_now & (1 << reg)) { |
| 5962 | fprintf(fout, " mmxr %s", regs_r32[reg]); |
| 5963 | if (regmask_init & (1 << reg)) |
| 5964 | fprintf(fout, " = { 0, }"); |
| 5965 | fprintf(fout, ";\n"); |
| 5966 | had_decl = 1; |
| 5967 | } |
| 5968 | } |
| 5969 | } |
| 5970 | // ... x87 |
| 5971 | if (need_float_stack) { |
| 5972 | fprintf(fout, " %s f_st[8];\n", float_type); |
| 5973 | fprintf(fout, " int f_stp = 0;\n"); |
| 5974 | had_decl = 1; |
| 5975 | } |
| 5976 | else { |
| 5977 | if (regmask_now & 0xff0000) { |
| 5978 | for (reg = 16; reg < 24; reg++) { |
| 5979 | if (regmask_now & (1 << reg)) { |
| 5980 | fprintf(fout, " %s f_st%d", float_type, reg - 16); |
| 5981 | if (regmask_init & (1 << reg)) |
| 5982 | fprintf(fout, " = 0"); |
| 5983 | fprintf(fout, ";\n"); |
| 5984 | had_decl = 1; |
| 5985 | } |
| 5986 | } |
| 5987 | } |
| 5988 | } |
| 5989 | |
| 5990 | if (need_float_sw) { |
| 5991 | fprintf(fout, " u16 f_sw;\n"); |
| 5992 | had_decl = 1; |
| 5993 | } |
| 5994 | |
| 5995 | if (regmask_save) { |
| 5996 | for (reg = 0; reg < 8; reg++) { |
| 5997 | if (regmask_save & (1 << reg)) { |
| 5998 | fprintf(fout, " u32 s_%s;\n", regs_r32[reg]); |
| 5999 | had_decl = 1; |
| 6000 | } |
| 6001 | } |
| 6002 | } |
| 6003 | |
| 6004 | for (i = 0; i < ARRAY_SIZE(save_arg_vars); i++) { |
| 6005 | if (save_arg_vars[i] == 0) |
| 6006 | continue; |
| 6007 | for (reg = 0; reg < 32; reg++) { |
| 6008 | if (save_arg_vars[i] & (1 << reg)) { |
| 6009 | fprintf(fout, " u32 %s;\n", |
| 6010 | saved_arg_name(buf1, sizeof(buf1), i, reg + 1)); |
| 6011 | had_decl = 1; |
| 6012 | } |
| 6013 | } |
| 6014 | } |
| 6015 | |
| 6016 | if (regmask_ffca) { |
| 6017 | for (reg = 0; reg < 32; reg++) { |
| 6018 | if (regmask_ffca & (1 << reg)) { |
| 6019 | fprintf(fout, " %s fs_%d;\n", float_type, reg + 1); |
| 6020 | had_decl = 1; |
| 6021 | } |
| 6022 | } |
| 6023 | } |
| 6024 | |
| 6025 | // declare push-pop temporaries |
| 6026 | if (regmask_pp) { |
| 6027 | for (reg = 0; reg < 8; reg++) { |
| 6028 | if (regmask_pp & (1 << reg)) { |
| 6029 | fprintf(fout, " u32 pp_%s;\n", regs_r32[reg]); |
| 6030 | had_decl = 1; |
| 6031 | } |
| 6032 | } |
| 6033 | } |
| 6034 | |
| 6035 | if (cond_vars) { |
| 6036 | for (i = 0; i < 8; i++) { |
| 6037 | if (cond_vars & (1 << i)) { |
| 6038 | fprintf(fout, " u32 cond_%s;\n", parsed_flag_op_names[i]); |
| 6039 | had_decl = 1; |
| 6040 | } |
| 6041 | } |
| 6042 | } |
| 6043 | |
| 6044 | if (need_tmp_var) { |
| 6045 | fprintf(fout, " u32 tmp;\n"); |
| 6046 | had_decl = 1; |
| 6047 | } |
| 6048 | |
| 6049 | if (need_tmp64) { |
| 6050 | fprintf(fout, " u64 tmp64;\n"); |
| 6051 | had_decl = 1; |
| 6052 | } |
| 6053 | |
| 6054 | if (had_decl) |
| 6055 | fprintf(fout, "\n"); |
| 6056 | |
| 6057 | // do stack clear, if needed |
| 6058 | if (g_sct_func_attr & SCTFA_CLEAR_SF) { |
| 6059 | fprintf(fout, " "); |
| 6060 | if (g_stack_clear_len != 0) { |
| 6061 | if (g_stack_clear_len <= 4) { |
| 6062 | for (i = 0; i < g_stack_clear_len; i++) |
| 6063 | fprintf(fout, "sf.d[%d] = ", g_stack_clear_start + i); |
| 6064 | fprintf(fout, "0;\n"); |
| 6065 | } |
| 6066 | else { |
| 6067 | fprintf(fout, "memset(&sf[%d], 0, %d);\n", |
| 6068 | g_stack_clear_start, g_stack_clear_len * 4); |
| 6069 | } |
| 6070 | } |
| 6071 | else |
| 6072 | fprintf(fout, "memset(&sf, 0, sizeof(sf));\n"); |
| 6073 | } |
| 6074 | |
| 6075 | if (g_func_pp->is_vararg) { |
| 6076 | if (g_func_pp->argc_stack == 0) |
| 6077 | ferr(ops, "vararg func without stack args?\n"); |
| 6078 | fprintf(fout, " va_start(ap, a%d);\n", g_func_pp->argc); |
| 6079 | } |
| 6080 | |
| 6081 | // output ops |
| 6082 | for (i = 0; i < opcnt; i++) |
| 6083 | { |
| 6084 | if (g_labels[i] != NULL) { |
| 6085 | fprintf(fout, "\n%s:\n", g_labels[i]); |
| 6086 | label_pending = 1; |
| 6087 | |
| 6088 | delayed_flag_op = NULL; |
| 6089 | last_arith_dst = NULL; |
| 6090 | } |
| 6091 | |
| 6092 | po = &ops[i]; |
| 6093 | if (po->flags & OPF_RMD) |
| 6094 | continue; |
| 6095 | |
| 6096 | no_output = 0; |
| 6097 | |
| 6098 | #define assert_operand_cnt(n_) \ |
| 6099 | if (po->operand_cnt != n_) \ |
| 6100 | ferr(po, "operand_cnt is %d/%d\n", po->operand_cnt, n_) |
| 6101 | |
| 6102 | // conditional/flag using op? |
| 6103 | if (po->flags & OPF_CC) |
| 6104 | { |
| 6105 | int is_delayed = 0; |
| 6106 | |
| 6107 | tmp_op = po->datap; |
| 6108 | |
| 6109 | // we go through all this trouble to avoid using parsed_flag_op, |
| 6110 | // which makes generated code much nicer |
| 6111 | if (delayed_flag_op != NULL) |
| 6112 | { |
| 6113 | out_cmp_test(buf1, sizeof(buf1), delayed_flag_op, |
| 6114 | po->pfo, po->pfo_inv); |
| 6115 | is_delayed = 1; |
| 6116 | } |
| 6117 | else if (last_arith_dst != NULL |
| 6118 | && (po->pfo == PFO_Z || po->pfo == PFO_S || po->pfo == PFO_P |
| 6119 | || (tmp_op && (tmp_op->op == OP_AND || tmp_op->op == OP_OR)) |
| 6120 | )) |
| 6121 | { |
| 6122 | out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst); |
| 6123 | out_test_for_cc(buf1, sizeof(buf1), po, po->pfo, po->pfo_inv, |
| 6124 | last_arith_dst->lmod, buf3); |
| 6125 | is_delayed = 1; |
| 6126 | } |
| 6127 | else if (tmp_op != NULL) { |
| 6128 | // use preprocessed flag calc results |
| 6129 | if (!(tmp_op->pfomask & (1 << po->pfo))) |
| 6130 | ferr(po, "not prepared for pfo %d\n", po->pfo); |
| 6131 | |
| 6132 | // note: pfo_inv was not yet applied |
| 6133 | snprintf(buf1, sizeof(buf1), "(%scond_%s)", |
| 6134 | po->pfo_inv ? "!" : "", parsed_flag_op_names[po->pfo]); |
| 6135 | } |
| 6136 | else { |
| 6137 | ferr(po, "all methods of finding comparison failed\n"); |
| 6138 | } |
| 6139 | |
| 6140 | if (po->flags & OPF_JMP) { |
| 6141 | fprintf(fout, " if %s", buf1); |
| 6142 | } |
| 6143 | else if (po->op == OP_RCL || po->op == OP_RCR |
| 6144 | || po->op == OP_ADC || po->op == OP_SBB) |
| 6145 | { |
| 6146 | if (is_delayed) |
| 6147 | fprintf(fout, " cond_%s = %s;\n", |
| 6148 | parsed_flag_op_names[po->pfo], buf1); |
| 6149 | } |
| 6150 | else if (po->flags & OPF_DATA) { // SETcc |
| 6151 | out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]); |
| 6152 | fprintf(fout, " %s = %s;", buf2, buf1); |
| 6153 | } |
| 6154 | else { |
| 6155 | ferr(po, "unhandled conditional op\n"); |
| 6156 | } |
| 6157 | } |
| 6158 | |
| 6159 | pfomask = po->pfomask; |
| 6160 | |
| 6161 | switch (po->op) |
| 6162 | { |
| 6163 | case OP_MOV: |
| 6164 | assert_operand_cnt(2); |
| 6165 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
| 6166 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6167 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]); |
| 6168 | fprintf(fout, " %s = %s;", buf1, |
| 6169 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
| 6170 | buf3, 0)); |
| 6171 | break; |
| 6172 | |
| 6173 | case OP_LEA: |
| 6174 | assert_operand_cnt(2); |
| 6175 | po->operand[1].lmod = OPLM_DWORD; // always |
| 6176 | fprintf(fout, " %s = %s;", |
| 6177 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
| 6178 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
| 6179 | NULL, 1)); |
| 6180 | break; |
| 6181 | |
| 6182 | case OP_MOVZX: |
| 6183 | assert_operand_cnt(2); |
| 6184 | fprintf(fout, " %s = %s;", |
| 6185 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
| 6186 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
| 6187 | break; |
| 6188 | |
| 6189 | case OP_MOVSX: |
| 6190 | assert_operand_cnt(2); |
| 6191 | switch (po->operand[1].lmod) { |
| 6192 | case OPLM_BYTE: |
| 6193 | strcpy(buf3, "(s8)"); |
| 6194 | break; |
| 6195 | case OPLM_WORD: |
| 6196 | strcpy(buf3, "(s16)"); |
| 6197 | break; |
| 6198 | default: |
| 6199 | ferr(po, "invalid src lmod: %d\n", po->operand[1].lmod); |
| 6200 | } |
| 6201 | fprintf(fout, " %s = %s;", |
| 6202 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
| 6203 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
| 6204 | buf3, 0)); |
| 6205 | break; |
| 6206 | |
| 6207 | case OP_XCHG: |
| 6208 | assert_operand_cnt(2); |
| 6209 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
| 6210 | fprintf(fout, " tmp = %s;", |
| 6211 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], "", 0)); |
| 6212 | fprintf(fout, " %s = %s;", |
| 6213 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
| 6214 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
| 6215 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0)); |
| 6216 | fprintf(fout, " %s = %stmp;", |
| 6217 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[1]), |
| 6218 | default_cast_to(buf3, sizeof(buf3), &po->operand[1])); |
| 6219 | snprintf(g_comment, sizeof(g_comment), "xchg"); |
| 6220 | break; |
| 6221 | |
| 6222 | case OP_NOT: |
| 6223 | assert_operand_cnt(1); |
| 6224 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6225 | fprintf(fout, " %s = ~%s;", buf1, buf1); |
| 6226 | break; |
| 6227 | |
| 6228 | case OP_XLAT: |
| 6229 | assert_operand_cnt(2); |
| 6230 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6231 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
| 6232 | fprintf(fout, " %s = *(u8 *)(%s + %s);", buf1, buf2, buf1); |
| 6233 | strcpy(g_comment, "xlat"); |
| 6234 | break; |
| 6235 | |
| 6236 | case OP_CDQ: |
| 6237 | assert_operand_cnt(2); |
| 6238 | fprintf(fout, " %s = (s32)%s >> 31;", |
| 6239 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
| 6240 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
| 6241 | strcpy(g_comment, "cdq"); |
| 6242 | break; |
| 6243 | |
| 6244 | case OP_BSWAP: |
| 6245 | assert_operand_cnt(1); |
| 6246 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6247 | fprintf(fout, " %s = __builtin_bswap32(%s);", buf1, buf1); |
| 6248 | break; |
| 6249 | |
| 6250 | case OP_LODS: |
| 6251 | if (po->flags & OPF_REP) { |
| 6252 | assert_operand_cnt(3); |
| 6253 | // hmh.. |
| 6254 | ferr(po, "TODO\n"); |
| 6255 | } |
| 6256 | else { |
| 6257 | assert_operand_cnt(2); |
| 6258 | fprintf(fout, " %s = %sesi; esi %c= %d;", |
| 6259 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[1]), |
| 6260 | lmod_cast_u_ptr(po, po->operand[1].lmod), |
| 6261 | (po->flags & OPF_DF) ? '-' : '+', |
| 6262 | lmod_bytes(po, po->operand[1].lmod)); |
| 6263 | strcpy(g_comment, "lods"); |
| 6264 | } |
| 6265 | break; |
| 6266 | |
| 6267 | case OP_STOS: |
| 6268 | if (po->flags & OPF_REP) { |
| 6269 | assert_operand_cnt(3); |
| 6270 | fprintf(fout, " for (; ecx != 0; ecx--, edi %c= %d)\n", |
| 6271 | (po->flags & OPF_DF) ? '-' : '+', |
| 6272 | lmod_bytes(po, po->operand[1].lmod)); |
| 6273 | fprintf(fout, " %sedi = eax;", |
| 6274 | lmod_cast_u_ptr(po, po->operand[1].lmod)); |
| 6275 | strcpy(g_comment, "rep stos"); |
| 6276 | } |
| 6277 | else { |
| 6278 | assert_operand_cnt(2); |
| 6279 | fprintf(fout, " %sedi = eax; edi %c= %d;", |
| 6280 | lmod_cast_u_ptr(po, po->operand[1].lmod), |
| 6281 | (po->flags & OPF_DF) ? '-' : '+', |
| 6282 | lmod_bytes(po, po->operand[1].lmod)); |
| 6283 | strcpy(g_comment, "stos"); |
| 6284 | } |
| 6285 | break; |
| 6286 | |
| 6287 | case OP_MOVS: |
| 6288 | j = lmod_bytes(po, po->operand[0].lmod); |
| 6289 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
| 6290 | l = (po->flags & OPF_DF) ? '-' : '+'; |
| 6291 | if (po->flags & OPF_REP) { |
| 6292 | assert_operand_cnt(3); |
| 6293 | fprintf(fout, |
| 6294 | " for (; ecx != 0; ecx--, edi %c= %d, esi %c= %d)\n", |
| 6295 | l, j, l, j); |
| 6296 | fprintf(fout, |
| 6297 | " %sedi = %sesi;", buf1, buf1); |
| 6298 | strcpy(g_comment, "rep movs"); |
| 6299 | } |
| 6300 | else { |
| 6301 | assert_operand_cnt(2); |
| 6302 | fprintf(fout, " %sedi = %sesi; edi %c= %d; esi %c= %d;", |
| 6303 | buf1, buf1, l, j, l, j); |
| 6304 | strcpy(g_comment, "movs"); |
| 6305 | } |
| 6306 | break; |
| 6307 | |
| 6308 | case OP_CMPS: |
| 6309 | // repe ~ repeat while ZF=1 |
| 6310 | j = lmod_bytes(po, po->operand[0].lmod); |
| 6311 | strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod)); |
| 6312 | l = (po->flags & OPF_DF) ? '-' : '+'; |
| 6313 | if (po->flags & OPF_REP) { |
| 6314 | assert_operand_cnt(3); |
| 6315 | fprintf(fout, |
| 6316 | " while (ecx != 0) {\n"); |
| 6317 | if (pfomask & (1 << PFO_C)) { |
| 6318 | // ugh.. |
| 6319 | fprintf(fout, |
| 6320 | " cond_c = %sesi < %sedi;\n", buf1, buf1); |
| 6321 | pfomask &= ~(1 << PFO_C); |
| 6322 | } |
| 6323 | fprintf(fout, |
| 6324 | " cond_z = (%sesi == %sedi); esi %c= %d, edi %c= %d;\n", |
| 6325 | buf1, buf1, l, j, l, j); |
| 6326 | fprintf(fout, |
| 6327 | " ecx--;\n" |
| 6328 | " if (cond_z %s 0) break;\n", |
| 6329 | (po->flags & OPF_REPZ) ? "==" : "!="); |
| 6330 | fprintf(fout, |
| 6331 | " }"); |
| 6332 | snprintf(g_comment, sizeof(g_comment), "rep%s cmps", |
| 6333 | (po->flags & OPF_REPZ) ? "e" : "ne"); |
| 6334 | } |
| 6335 | else { |
| 6336 | assert_operand_cnt(2); |
| 6337 | fprintf(fout, |
| 6338 | " cond_z = (%sesi == %sedi); esi %c= %d; edi %c= %d;", |
| 6339 | buf1, buf1, l, j, l, j); |
| 6340 | strcpy(g_comment, "cmps"); |
| 6341 | } |
| 6342 | pfomask &= ~(1 << PFO_Z); |
| 6343 | last_arith_dst = NULL; |
| 6344 | delayed_flag_op = NULL; |
| 6345 | break; |
| 6346 | |
| 6347 | case OP_SCAS: |
| 6348 | // only does ZF (for now) |
| 6349 | // repe ~ repeat while ZF=1 |
| 6350 | j = lmod_bytes(po, po->operand[1].lmod); |
| 6351 | l = (po->flags & OPF_DF) ? '-' : '+'; |
| 6352 | if (po->flags & OPF_REP) { |
| 6353 | assert_operand_cnt(3); |
| 6354 | fprintf(fout, |
| 6355 | " while (ecx != 0) {\n"); |
| 6356 | fprintf(fout, |
| 6357 | " cond_z = (%seax == %sedi); edi %c= %d;\n", |
| 6358 | lmod_cast_u(po, po->operand[1].lmod), |
| 6359 | lmod_cast_u_ptr(po, po->operand[1].lmod), l, j); |
| 6360 | fprintf(fout, |
| 6361 | " ecx--;\n" |
| 6362 | " if (cond_z %s 0) break;\n", |
| 6363 | (po->flags & OPF_REPZ) ? "==" : "!="); |
| 6364 | fprintf(fout, |
| 6365 | " }"); |
| 6366 | snprintf(g_comment, sizeof(g_comment), "rep%s scas", |
| 6367 | (po->flags & OPF_REPZ) ? "e" : "ne"); |
| 6368 | } |
| 6369 | else { |
| 6370 | assert_operand_cnt(2); |
| 6371 | fprintf(fout, " cond_z = (%seax == %sedi); edi %c= %d;", |
| 6372 | lmod_cast_u(po, po->operand[1].lmod), |
| 6373 | lmod_cast_u_ptr(po, po->operand[1].lmod), l, j); |
| 6374 | strcpy(g_comment, "scas"); |
| 6375 | } |
| 6376 | pfomask &= ~(1 << PFO_Z); |
| 6377 | last_arith_dst = NULL; |
| 6378 | delayed_flag_op = NULL; |
| 6379 | break; |
| 6380 | |
| 6381 | // arithmetic w/flags |
| 6382 | case OP_AND: |
| 6383 | if (po->operand[1].type == OPT_CONST && !po->operand[1].val) |
| 6384 | goto dualop_arith_const; |
| 6385 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
| 6386 | goto dualop_arith; |
| 6387 | |
| 6388 | case OP_OR: |
| 6389 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
| 6390 | if (po->operand[1].type == OPT_CONST) { |
| 6391 | j = lmod_bytes(po, po->operand[0].lmod); |
| 6392 | if (((1ull << j * 8) - 1) == po->operand[1].val) |
| 6393 | goto dualop_arith_const; |
| 6394 | } |
| 6395 | goto dualop_arith; |
| 6396 | |
| 6397 | dualop_arith: |
| 6398 | assert_operand_cnt(2); |
| 6399 | fprintf(fout, " %s %s= %s;", |
| 6400 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
| 6401 | op_to_c(po), |
| 6402 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
| 6403 | output_std_flags(fout, po, &pfomask, buf1); |
| 6404 | last_arith_dst = &po->operand[0]; |
| 6405 | delayed_flag_op = NULL; |
| 6406 | break; |
| 6407 | |
| 6408 | dualop_arith_const: |
| 6409 | // and 0, or ~0 used instead mov |
| 6410 | assert_operand_cnt(2); |
| 6411 | fprintf(fout, " %s = %s;", |
| 6412 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
| 6413 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], |
| 6414 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0)); |
| 6415 | output_std_flags(fout, po, &pfomask, buf1); |
| 6416 | last_arith_dst = &po->operand[0]; |
| 6417 | delayed_flag_op = NULL; |
| 6418 | break; |
| 6419 | |
| 6420 | case OP_SHL: |
| 6421 | case OP_SHR: |
| 6422 | assert_operand_cnt(2); |
| 6423 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6424 | if (pfomask & (1 << PFO_C)) { |
| 6425 | if (po->operand[1].type == OPT_CONST) { |
| 6426 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
| 6427 | j = po->operand[1].val; |
| 6428 | j %= l; |
| 6429 | if (j != 0) { |
| 6430 | if (po->op == OP_SHL) |
| 6431 | j = l - j; |
| 6432 | else |
| 6433 | j -= 1; |
| 6434 | fprintf(fout, " cond_c = (%s >> %d) & 1;\n", |
| 6435 | buf1, j); |
| 6436 | } |
| 6437 | else |
| 6438 | ferr(po, "zero shift?\n"); |
| 6439 | } |
| 6440 | else |
| 6441 | ferr(po, "TODO\n"); |
| 6442 | pfomask &= ~(1 << PFO_C); |
| 6443 | } |
| 6444 | fprintf(fout, " %s %s= %s", buf1, op_to_c(po), |
| 6445 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
| 6446 | if (po->operand[1].type != OPT_CONST) |
| 6447 | fprintf(fout, " & 0x1f"); |
| 6448 | fprintf(fout, ";"); |
| 6449 | output_std_flags(fout, po, &pfomask, buf1); |
| 6450 | last_arith_dst = &po->operand[0]; |
| 6451 | delayed_flag_op = NULL; |
| 6452 | break; |
| 6453 | |
| 6454 | case OP_SAR: |
| 6455 | assert_operand_cnt(2); |
| 6456 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6457 | fprintf(fout, " %s = %s%s >> %s;", buf1, |
| 6458 | lmod_cast_s(po, po->operand[0].lmod), buf1, |
| 6459 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
| 6460 | output_std_flags(fout, po, &pfomask, buf1); |
| 6461 | last_arith_dst = &po->operand[0]; |
| 6462 | delayed_flag_op = NULL; |
| 6463 | break; |
| 6464 | |
| 6465 | case OP_SHLD: |
| 6466 | case OP_SHRD: |
| 6467 | assert_operand_cnt(3); |
| 6468 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
| 6469 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
| 6470 | out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[2]); |
| 6471 | if (po->operand[2].type != OPT_CONST) { |
| 6472 | // no handling for "undefined" case, hopefully not needed |
| 6473 | snprintf(buf2, sizeof(buf2), "(%s & 0x1f)", buf3); |
| 6474 | strcpy(buf3, buf2); |
| 6475 | } |
| 6476 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
| 6477 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6478 | if (po->op == OP_SHLD) { |
| 6479 | fprintf(fout, " %s <<= %s; %s |= %s >> (%d - %s);", |
| 6480 | buf1, buf3, buf1, buf2, l, buf3); |
| 6481 | strcpy(g_comment, "shld"); |
| 6482 | } |
| 6483 | else { |
| 6484 | fprintf(fout, " %s >>= %s; %s |= %s << (%d - %s);", |
| 6485 | buf1, buf3, buf1, buf2, l, buf3); |
| 6486 | strcpy(g_comment, "shrd"); |
| 6487 | } |
| 6488 | output_std_flags(fout, po, &pfomask, buf1); |
| 6489 | last_arith_dst = &po->operand[0]; |
| 6490 | delayed_flag_op = NULL; |
| 6491 | break; |
| 6492 | |
| 6493 | case OP_ROL: |
| 6494 | case OP_ROR: |
| 6495 | assert_operand_cnt(2); |
| 6496 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6497 | if (po->operand[1].type == OPT_CONST) { |
| 6498 | j = po->operand[1].val; |
| 6499 | j %= lmod_bytes(po, po->operand[0].lmod) * 8; |
| 6500 | fprintf(fout, po->op == OP_ROL ? |
| 6501 | " %s = (%s << %d) | (%s >> %d);" : |
| 6502 | " %s = (%s >> %d) | (%s << %d);", |
| 6503 | buf1, buf1, j, buf1, |
| 6504 | lmod_bytes(po, po->operand[0].lmod) * 8 - j); |
| 6505 | } |
| 6506 | else |
| 6507 | ferr(po, "TODO\n"); |
| 6508 | output_std_flags(fout, po, &pfomask, buf1); |
| 6509 | last_arith_dst = &po->operand[0]; |
| 6510 | delayed_flag_op = NULL; |
| 6511 | break; |
| 6512 | |
| 6513 | case OP_RCL: |
| 6514 | case OP_RCR: |
| 6515 | assert_operand_cnt(2); |
| 6516 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6517 | l = lmod_bytes(po, po->operand[0].lmod) * 8; |
| 6518 | if (po->operand[1].type == OPT_CONST) { |
| 6519 | j = po->operand[1].val % l; |
| 6520 | if (j == 0) |
| 6521 | ferr(po, "zero rotate\n"); |
| 6522 | fprintf(fout, " tmp = (%s >> %d) & 1;\n", |
| 6523 | buf1, (po->op == OP_RCL) ? (l - j) : (j - 1)); |
| 6524 | if (po->op == OP_RCL) { |
| 6525 | fprintf(fout, |
| 6526 | " %s = (%s << %d) | (cond_c << %d)", |
| 6527 | buf1, buf1, j, j - 1); |
| 6528 | if (j != 1) |
| 6529 | fprintf(fout, " | (%s >> %d)", buf1, l + 1 - j); |
| 6530 | } |
| 6531 | else { |
| 6532 | fprintf(fout, |
| 6533 | " %s = (%s >> %d) | (cond_c << %d)", |
| 6534 | buf1, buf1, j, l - j); |
| 6535 | if (j != 1) |
| 6536 | fprintf(fout, " | (%s << %d)", buf1, l + 1 - j); |
| 6537 | } |
| 6538 | fprintf(fout, ";\n"); |
| 6539 | fprintf(fout, " cond_c = tmp;"); |
| 6540 | } |
| 6541 | else |
| 6542 | ferr(po, "TODO\n"); |
| 6543 | strcpy(g_comment, (po->op == OP_RCL) ? "rcl" : "rcr"); |
| 6544 | output_std_flags(fout, po, &pfomask, buf1); |
| 6545 | last_arith_dst = &po->operand[0]; |
| 6546 | delayed_flag_op = NULL; |
| 6547 | break; |
| 6548 | |
| 6549 | case OP_XOR: |
| 6550 | assert_operand_cnt(2); |
| 6551 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
| 6552 | if (IS(opr_name(po, 0), opr_name(po, 1))) { |
| 6553 | // special case for XOR |
| 6554 | int z = PFOB_O | PFOB_C | PFOB_S | (1 << PFO_L); |
| 6555 | for (j = 0; j <= PFO_LE; j++) { |
| 6556 | if (pfomask & (1 << j)) { |
| 6557 | fprintf(fout, " cond_%s = %d;\n", |
| 6558 | parsed_flag_op_names[j], (1 << j) & z ? 0 : 1); |
| 6559 | pfomask &= ~(1 << j); |
| 6560 | } |
| 6561 | } |
| 6562 | fprintf(fout, " %s = 0;", |
| 6563 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
| 6564 | last_arith_dst = &po->operand[0]; |
| 6565 | delayed_flag_op = NULL; |
| 6566 | break; |
| 6567 | } |
| 6568 | goto dualop_arith; |
| 6569 | |
| 6570 | case OP_ADD: |
| 6571 | assert_operand_cnt(2); |
| 6572 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
| 6573 | if (pfomask & (1 << PFO_C)) { |
| 6574 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6575 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
| 6576 | if (po->operand[0].lmod == OPLM_DWORD) { |
| 6577 | fprintf(fout, " tmp64 = (u64)%s + %s;\n", buf1, buf2); |
| 6578 | fprintf(fout, " cond_c = tmp64 >> 32;\n"); |
| 6579 | fprintf(fout, " %s = (u32)tmp64;", |
| 6580 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
| 6581 | strcat(g_comment, " add64"); |
| 6582 | } |
| 6583 | else { |
| 6584 | fprintf(fout, " cond_c = ((u32)%s + %s) >> %d;\n", |
| 6585 | buf1, buf2, lmod_bytes(po, po->operand[0].lmod) * 8); |
| 6586 | fprintf(fout, " %s += %s;", |
| 6587 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
| 6588 | buf2); |
| 6589 | } |
| 6590 | pfomask &= ~(1 << PFO_C); |
| 6591 | output_std_flags(fout, po, &pfomask, buf1); |
| 6592 | last_arith_dst = &po->operand[0]; |
| 6593 | delayed_flag_op = NULL; |
| 6594 | break; |
| 6595 | } |
| 6596 | if (pfomask & (1 << PFO_LE)) { |
| 6597 | out_cmp_for_cc(buf1, sizeof(buf1), po, PFO_LE, 0, 1); |
| 6598 | fprintf(fout, " cond_%s = %s;\n", |
| 6599 | parsed_flag_op_names[PFO_LE], buf1); |
| 6600 | pfomask &= ~(1 << PFO_LE); |
| 6601 | } |
| 6602 | goto dualop_arith; |
| 6603 | |
| 6604 | case OP_SUB: |
| 6605 | assert_operand_cnt(2); |
| 6606 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
| 6607 | if (pfomask & ~((1 << PFO_Z) | (1 << PFO_S))) { |
| 6608 | for (j = 0; j <= PFO_LE; j++) { |
| 6609 | if (!(pfomask & (1 << j))) |
| 6610 | continue; |
| 6611 | if (j == PFO_Z || j == PFO_S) |
| 6612 | continue; |
| 6613 | |
| 6614 | out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0, 0); |
| 6615 | fprintf(fout, " cond_%s = %s;\n", |
| 6616 | parsed_flag_op_names[j], buf1); |
| 6617 | pfomask &= ~(1 << j); |
| 6618 | } |
| 6619 | } |
| 6620 | goto dualop_arith; |
| 6621 | |
| 6622 | case OP_ADC: |
| 6623 | case OP_SBB: |
| 6624 | assert_operand_cnt(2); |
| 6625 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
| 6626 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6627 | if (po->op == OP_SBB |
| 6628 | && IS(po->operand[0].name, po->operand[1].name)) |
| 6629 | { |
| 6630 | // avoid use of unitialized var |
| 6631 | fprintf(fout, " %s = -cond_c;", buf1); |
| 6632 | // carry remains what it was |
| 6633 | pfomask &= ~(1 << PFO_C); |
| 6634 | } |
| 6635 | else { |
| 6636 | fprintf(fout, " %s %s= %s + cond_c;", buf1, op_to_c(po), |
| 6637 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1])); |
| 6638 | } |
| 6639 | output_std_flags(fout, po, &pfomask, buf1); |
| 6640 | last_arith_dst = &po->operand[0]; |
| 6641 | delayed_flag_op = NULL; |
| 6642 | break; |
| 6643 | |
| 6644 | case OP_BSF: |
| 6645 | assert_operand_cnt(2); |
| 6646 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]); |
| 6647 | fprintf(fout, " %s = %s ? __builtin_ffs(%s) - 1 : 0;", |
| 6648 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
| 6649 | buf2, buf2); |
| 6650 | output_std_flags(fout, po, &pfomask, buf1); |
| 6651 | last_arith_dst = &po->operand[0]; |
| 6652 | delayed_flag_op = NULL; |
| 6653 | strcat(g_comment, " bsf"); |
| 6654 | break; |
| 6655 | |
| 6656 | case OP_DEC: |
| 6657 | if (pfomask & ~(PFOB_S | PFOB_S | PFOB_C)) { |
| 6658 | for (j = 0; j <= PFO_LE; j++) { |
| 6659 | if (!(pfomask & (1 << j))) |
| 6660 | continue; |
| 6661 | if (j == PFO_Z || j == PFO_S || j == PFO_C) |
| 6662 | continue; |
| 6663 | |
| 6664 | out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0, 0); |
| 6665 | fprintf(fout, " cond_%s = %s;\n", |
| 6666 | parsed_flag_op_names[j], buf1); |
| 6667 | pfomask &= ~(1 << j); |
| 6668 | } |
| 6669 | } |
| 6670 | // fallthrough |
| 6671 | |
| 6672 | case OP_INC: |
| 6673 | if (pfomask & (1 << PFO_C)) |
| 6674 | // carry is unaffected by inc/dec.. wtf? |
| 6675 | ferr(po, "carry propagation needed\n"); |
| 6676 | |
| 6677 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6678 | if (po->operand[0].type == OPT_REG) { |
| 6679 | strcpy(buf2, po->op == OP_INC ? "++" : "--"); |
| 6680 | fprintf(fout, " %s%s;", buf1, buf2); |
| 6681 | } |
| 6682 | else { |
| 6683 | strcpy(buf2, po->op == OP_INC ? "+" : "-"); |
| 6684 | fprintf(fout, " %s %s= 1;", buf1, buf2); |
| 6685 | } |
| 6686 | output_std_flags(fout, po, &pfomask, buf1); |
| 6687 | last_arith_dst = &po->operand[0]; |
| 6688 | delayed_flag_op = NULL; |
| 6689 | break; |
| 6690 | |
| 6691 | case OP_NEG: |
| 6692 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6693 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]); |
| 6694 | fprintf(fout, " %s = -%s%s;", buf1, |
| 6695 | lmod_cast_s(po, po->operand[0].lmod), buf2); |
| 6696 | last_arith_dst = &po->operand[0]; |
| 6697 | delayed_flag_op = NULL; |
| 6698 | if (pfomask & (1 << PFO_C)) { |
| 6699 | fprintf(fout, "\n cond_c = (%s != 0);", buf1); |
| 6700 | pfomask &= ~(1 << PFO_C); |
| 6701 | } |
| 6702 | break; |
| 6703 | |
| 6704 | case OP_IMUL: |
| 6705 | if (po->operand_cnt == 2) { |
| 6706 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
| 6707 | goto dualop_arith; |
| 6708 | } |
| 6709 | if (po->operand_cnt == 3) |
| 6710 | ferr(po, "TODO imul3\n"); |
| 6711 | // fallthrough |
| 6712 | case OP_MUL: |
| 6713 | assert_operand_cnt(1); |
| 6714 | switch (po->operand[0].lmod) { |
| 6715 | case OPLM_DWORD: |
| 6716 | strcpy(buf1, po->op == OP_IMUL ? "(s64)(s32)" : "(u64)"); |
| 6717 | fprintf(fout, " tmp64 = %seax * %s%s;\n", buf1, buf1, |
| 6718 | out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0])); |
| 6719 | fprintf(fout, " edx = tmp64 >> 32;\n"); |
| 6720 | fprintf(fout, " eax = tmp64;"); |
| 6721 | break; |
| 6722 | case OPLM_BYTE: |
| 6723 | strcpy(buf1, po->op == OP_IMUL ? "(s16)(s8)" : "(u16)(u8)"); |
| 6724 | fprintf(fout, " LOWORD(eax) = %seax * %s;", buf1, |
| 6725 | out_src_opr(buf2, sizeof(buf2), po, &po->operand[0], |
| 6726 | buf1, 0)); |
| 6727 | break; |
| 6728 | default: |
| 6729 | ferr(po, "TODO: unhandled mul type\n"); |
| 6730 | break; |
| 6731 | } |
| 6732 | last_arith_dst = NULL; |
| 6733 | delayed_flag_op = NULL; |
| 6734 | break; |
| 6735 | |
| 6736 | case OP_DIV: |
| 6737 | case OP_IDIV: |
| 6738 | assert_operand_cnt(1); |
| 6739 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
| 6740 | strcpy(cast, lmod_cast(po, po->operand[0].lmod, |
| 6741 | po->op == OP_IDIV)); |
| 6742 | switch (po->operand[0].lmod) { |
| 6743 | case OPLM_DWORD: |
| 6744 | if (po->flags & OPF_32BIT) |
| 6745 | snprintf(buf2, sizeof(buf2), "%seax", cast); |
| 6746 | else { |
| 6747 | fprintf(fout, " tmp64 = ((u64)edx << 32) | eax;\n"); |
| 6748 | snprintf(buf2, sizeof(buf2), "%stmp64", |
| 6749 | (po->op == OP_IDIV) ? "(s64)" : ""); |
| 6750 | } |
| 6751 | if (po->operand[0].type == OPT_REG |
| 6752 | && po->operand[0].reg == xDX) |
| 6753 | { |
| 6754 | fprintf(fout, " eax = %s / %s%s;\n", buf2, cast, buf1); |
| 6755 | fprintf(fout, " edx = %s %% %s%s;", buf2, cast, buf1); |
| 6756 | } |
| 6757 | else { |
| 6758 | fprintf(fout, " edx = %s %% %s%s;\n", buf2, cast, buf1); |
| 6759 | fprintf(fout, " eax = %s / %s%s;", buf2, cast, buf1); |
| 6760 | } |
| 6761 | break; |
| 6762 | case OPLM_WORD: |
| 6763 | fprintf(fout, " tmp = (edx << 16) | (eax & 0xffff);\n"); |
| 6764 | snprintf(buf2, sizeof(buf2), "%stmp", |
| 6765 | (po->op == OP_IDIV) ? "(s32)" : ""); |
| 6766 | if (po->operand[0].type == OPT_REG |
| 6767 | && po->operand[0].reg == xDX) |
| 6768 | { |
| 6769 | fprintf(fout, " LOWORD(eax) = %s / %s%s;\n", |
| 6770 | buf2, cast, buf1); |
| 6771 | fprintf(fout, " LOWORD(edx) = %s %% %s%s;", |
| 6772 | buf2, cast, buf1); |
| 6773 | } |
| 6774 | else { |
| 6775 | fprintf(fout, " LOWORD(edx) = %s %% %s%s;\n", |
| 6776 | buf2, cast, buf1); |
| 6777 | fprintf(fout, " LOWORD(eax) = %s / %s%s;", |
| 6778 | buf2, cast, buf1); |
| 6779 | } |
| 6780 | strcat(g_comment, " div16"); |
| 6781 | break; |
| 6782 | default: |
| 6783 | ferr(po, "unhandled div lmod %d\n", po->operand[0].lmod); |
| 6784 | } |
| 6785 | last_arith_dst = NULL; |
| 6786 | delayed_flag_op = NULL; |
| 6787 | break; |
| 6788 | |
| 6789 | case OP_TEST: |
| 6790 | case OP_CMP: |
| 6791 | propagate_lmod(po, &po->operand[0], &po->operand[1]); |
| 6792 | if (pfomask != 0) { |
| 6793 | for (j = 0; j < 8; j++) { |
| 6794 | if (pfomask & (1 << j)) { |
| 6795 | out_cmp_test(buf1, sizeof(buf1), po, j, 0); |
| 6796 | fprintf(fout, " cond_%s = %s;", |
| 6797 | parsed_flag_op_names[j], buf1); |
| 6798 | } |
| 6799 | } |
| 6800 | pfomask = 0; |
| 6801 | } |
| 6802 | else |
| 6803 | no_output = 1; |
| 6804 | last_arith_dst = NULL; |
| 6805 | delayed_flag_op = po; |
| 6806 | break; |
| 6807 | |
| 6808 | case OP_SCC: |
| 6809 | // SETcc - should already be handled |
| 6810 | break; |
| 6811 | |
| 6812 | // note: we reuse OP_Jcc for SETcc, only flags differ |
| 6813 | case OP_JCC: |
| 6814 | fprintf(fout, "\n goto %s;", po->operand[0].name); |
| 6815 | break; |
| 6816 | |
| 6817 | case OP_JECXZ: |
| 6818 | fprintf(fout, " if (ecx == 0)\n"); |
| 6819 | fprintf(fout, " goto %s;", po->operand[0].name); |
| 6820 | strcat(g_comment, " jecxz"); |
| 6821 | break; |
| 6822 | |
| 6823 | case OP_LOOP: |
| 6824 | fprintf(fout, " if (--ecx != 0)\n"); |
| 6825 | fprintf(fout, " goto %s;", po->operand[0].name); |
| 6826 | strcat(g_comment, " loop"); |
| 6827 | break; |
| 6828 | |
| 6829 | case OP_JMP: |
| 6830 | assert_operand_cnt(1); |
| 6831 | last_arith_dst = NULL; |
| 6832 | delayed_flag_op = NULL; |
| 6833 | |
| 6834 | if (po->operand[0].type == OPT_REGMEM) { |
| 6835 | ret = sscanf(po->operand[0].name, "%[^[][%[^*]*4]", |
| 6836 | buf1, buf2); |
| 6837 | if (ret != 2) |
| 6838 | ferr(po, "parse failure for jmp '%s'\n", |
| 6839 | po->operand[0].name); |
| 6840 | fprintf(fout, " goto *jt_%s[%s];", buf1, buf2); |
| 6841 | break; |
| 6842 | } |
| 6843 | else if (po->operand[0].type != OPT_LABEL) |
| 6844 | ferr(po, "unhandled jmp type\n"); |
| 6845 | |
| 6846 | fprintf(fout, " goto %s;", po->operand[0].name); |
| 6847 | break; |
| 6848 | |
| 6849 | case OP_CALL: |
| 6850 | assert_operand_cnt(1); |
| 6851 | pp = po->pp; |
| 6852 | my_assert_not(pp, NULL); |
| 6853 | |
| 6854 | strcpy(buf3, " "); |
| 6855 | if (po->flags & OPF_CC) { |
| 6856 | // we treat conditional branch to another func |
| 6857 | // (yes such code exists..) as conditional tailcall |
| 6858 | strcat(buf3, " "); |
| 6859 | fprintf(fout, " {\n"); |
| 6860 | } |
| 6861 | |
| 6862 | if (pp->is_fptr && !pp->is_arg) { |
| 6863 | fprintf(fout, "%s%s = %s;\n", buf3, pp->name, |
| 6864 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], |
| 6865 | "(void *)", 0)); |
| 6866 | if (pp->is_unresolved) |
| 6867 | fprintf(fout, "%sunresolved_call(\"%s:%d\", %s);\n", |
| 6868 | buf3, asmfn, po->asmln, pp->name); |
| 6869 | } |
| 6870 | |
| 6871 | fprintf(fout, "%s", buf3); |
| 6872 | if (strstr(pp->ret_type.name, "int64")) { |
| 6873 | if (po->flags & OPF_TAIL) |
| 6874 | ferr(po, "int64 and tail?\n"); |
| 6875 | fprintf(fout, "tmp64 = "); |
| 6876 | } |
| 6877 | else if (!IS(pp->ret_type.name, "void")) { |
| 6878 | if (po->flags & OPF_TAIL) { |
| 6879 | if (regmask_ret & mxAX) { |
| 6880 | fprintf(fout, "return "); |
| 6881 | if (g_func_pp->ret_type.is_ptr != pp->ret_type.is_ptr) |
| 6882 | fprintf(fout, "(%s)", g_func_pp->ret_type.name); |
| 6883 | } |
| 6884 | else if (regmask_ret & mxST0) |
| 6885 | ferr(po, "float tailcall\n"); |
| 6886 | } |
| 6887 | else if (po->regmask_dst & mxAX) { |
| 6888 | fprintf(fout, "eax = "); |
| 6889 | if (pp->ret_type.is_ptr) |
| 6890 | fprintf(fout, "(u32)"); |
| 6891 | } |
| 6892 | else if (po->regmask_dst & mxST0) { |
| 6893 | ferr_assert(po, po->flags & OPF_FPUSH); |
| 6894 | if (need_float_stack) |
| 6895 | fprintf(fout, "f_st[--f_stp & 7] = "); |
| 6896 | else |
| 6897 | fprintf(fout, "f_st0 = "); |
| 6898 | } |
| 6899 | } |
| 6900 | |
| 6901 | if (pp->name[0] == 0) |
| 6902 | ferr(po, "missing pp->name\n"); |
| 6903 | fprintf(fout, "%s%s(", pp->name, |
| 6904 | pp->has_structarg ? "_sa" : ""); |
| 6905 | |
| 6906 | if (po->flags & OPF_ATAIL) { |
| 6907 | if (pp->argc_stack != g_func_pp->argc_stack |
| 6908 | || (pp->argc_stack > 0 |
| 6909 | && pp->is_stdcall != g_func_pp->is_stdcall)) |
| 6910 | ferr(po, "incompatible tailcall\n"); |
| 6911 | if (g_func_pp->has_retreg) |
| 6912 | ferr(po, "TODO: retreg+tailcall\n"); |
| 6913 | |
| 6914 | for (arg = j = 0; arg < pp->argc; arg++) { |
| 6915 | if (arg > 0) |
| 6916 | fprintf(fout, ", "); |
| 6917 | |
| 6918 | cast[0] = 0; |
| 6919 | if (pp->arg[arg].type.is_ptr) |
| 6920 | snprintf(cast, sizeof(cast), "(%s)", |
| 6921 | pp->arg[arg].type.name); |
| 6922 | |
| 6923 | if (pp->arg[arg].reg != NULL) { |
| 6924 | fprintf(fout, "%s%s", cast, pp->arg[arg].reg); |
| 6925 | continue; |
| 6926 | } |
| 6927 | // stack arg |
| 6928 | for (; j < g_func_pp->argc; j++) |
| 6929 | if (g_func_pp->arg[j].reg == NULL) |
| 6930 | break; |
| 6931 | fprintf(fout, "%sa%d", cast, j + 1); |
| 6932 | j++; |
| 6933 | } |
| 6934 | } |
| 6935 | else { |
| 6936 | for (arg = 0; arg < pp->argc; arg++) { |
| 6937 | if (arg > 0) |
| 6938 | fprintf(fout, ", "); |
| 6939 | |
| 6940 | cast[0] = 0; |
| 6941 | if (pp->arg[arg].type.is_ptr) |
| 6942 | snprintf(cast, sizeof(cast), "(%s)", |
| 6943 | pp->arg[arg].type.name); |
| 6944 | |
| 6945 | if (pp->arg[arg].reg != NULL) { |
| 6946 | if (pp->arg[arg].type.is_retreg) |
| 6947 | fprintf(fout, "&%s", pp->arg[arg].reg); |
| 6948 | else if (IS(pp->arg[arg].reg, "ebp") |
| 6949 | && !(po->flags & OPF_EBP_S)) |
| 6950 | { |
| 6951 | // rare special case |
| 6952 | fprintf(fout, "%s(u32)&sf.b[sizeof(sf)]", cast); |
| 6953 | strcat(g_comment, " bp_ref"); |
| 6954 | } |
| 6955 | else |
| 6956 | fprintf(fout, "%s%s", cast, pp->arg[arg].reg); |
| 6957 | continue; |
| 6958 | } |
| 6959 | |
| 6960 | // stack arg |
| 6961 | tmp_op = pp->arg[arg].datap; |
| 6962 | if (tmp_op == NULL) |
| 6963 | ferr(po, "parsed_op missing for arg%d\n", arg); |
| 6964 | |
| 6965 | if (tmp_op->flags & OPF_VAPUSH) { |
| 6966 | fprintf(fout, "ap"); |
| 6967 | } |
| 6968 | else if (tmp_op->op == OP_FST) { |
| 6969 | fprintf(fout, "fs_%d", tmp_op->p_argnum); |
| 6970 | if (tmp_op->operand[0].lmod == OPLM_QWORD) |
| 6971 | arg++; |
| 6972 | } |
| 6973 | else if (tmp_op->p_argpass != 0) { |
| 6974 | fprintf(fout, "a%d", tmp_op->p_argpass); |
| 6975 | } |
| 6976 | else if (pp->arg[arg].is_saved) { |
| 6977 | ferr_assert(po, tmp_op->p_argnum > 0); |
| 6978 | fprintf(fout, "%s%s", cast, |
| 6979 | saved_arg_name(buf1, sizeof(buf1), |
| 6980 | tmp_op->p_arggrp, tmp_op->p_argnum)); |
| 6981 | } |
| 6982 | else { |
| 6983 | fprintf(fout, "%s", |
| 6984 | out_src_opr(buf1, sizeof(buf1), |
| 6985 | tmp_op, &tmp_op->operand[0], cast, 0)); |
| 6986 | } |
| 6987 | } |
| 6988 | } |
| 6989 | fprintf(fout, ");"); |
| 6990 | |
| 6991 | if (strstr(pp->ret_type.name, "int64")) { |
| 6992 | fprintf(fout, "\n"); |
| 6993 | fprintf(fout, "%sedx = tmp64 >> 32;\n", buf3); |
| 6994 | fprintf(fout, "%seax = tmp64;", buf3); |
| 6995 | } |
| 6996 | |
| 6997 | if (pp->is_unresolved) { |
| 6998 | snprintf(buf2, sizeof(buf2), " unresolved %dreg", |
| 6999 | pp->argc_reg); |
| 7000 | strcat(g_comment, buf2); |
| 7001 | } |
| 7002 | |
| 7003 | if (po->flags & OPF_TAIL) { |
| 7004 | ret = 0; |
| 7005 | if (i == opcnt - 1 || pp->is_noreturn) |
| 7006 | ret = 0; |
| 7007 | else if (IS(pp->ret_type.name, "void")) |
| 7008 | ret = 1; |
| 7009 | else if (!(regmask_ret & (1 << xAX))) |
| 7010 | ret = 1; |
| 7011 | // else already handled as 'return f()' |
| 7012 | |
| 7013 | if (ret) { |
| 7014 | fprintf(fout, "\n%sreturn;", buf3); |
| 7015 | strcat(g_comment, " ^ tailcall"); |
| 7016 | } |
| 7017 | else |
| 7018 | strcat(g_comment, " tailcall"); |
| 7019 | |
| 7020 | if ((regmask_ret & (1 << xAX)) |
| 7021 | && IS(pp->ret_type.name, "void") && !pp->is_noreturn) |
| 7022 | { |
| 7023 | ferr(po, "int func -> void func tailcall?\n"); |
| 7024 | } |
| 7025 | } |
| 7026 | if (pp->is_noreturn) |
| 7027 | strcat(g_comment, " noreturn"); |
| 7028 | if ((po->flags & OPF_ATAIL) && pp->argc_stack > 0) |
| 7029 | strcat(g_comment, " argframe"); |
| 7030 | if (po->flags & OPF_CC) |
| 7031 | strcat(g_comment, " cond"); |
| 7032 | |
| 7033 | if (po->flags & OPF_CC) |
| 7034 | fprintf(fout, "\n }"); |
| 7035 | |
| 7036 | delayed_flag_op = NULL; |
| 7037 | last_arith_dst = NULL; |
| 7038 | break; |
| 7039 | |
| 7040 | case OP_RET: |
| 7041 | if (g_func_pp->is_vararg) |
| 7042 | fprintf(fout, " va_end(ap);\n"); |
| 7043 | if (g_func_pp->has_retreg) { |
| 7044 | for (arg = 0; arg < g_func_pp->argc; arg++) |
| 7045 | if (g_func_pp->arg[arg].type.is_retreg) |
| 7046 | fprintf(fout, " *r_%s = %s;\n", |
| 7047 | g_func_pp->arg[arg].reg, g_func_pp->arg[arg].reg); |
| 7048 | } |
| 7049 | |
| 7050 | if (regmask_ret & mxST0) { |
| 7051 | fprintf(fout, " return %s;", float_st0); |
| 7052 | } |
| 7053 | else if (!(regmask_ret & mxAX)) { |
| 7054 | if (i != opcnt - 1 || label_pending) |
| 7055 | fprintf(fout, " return;"); |
| 7056 | } |
| 7057 | else if (g_func_pp->ret_type.is_ptr) { |
| 7058 | fprintf(fout, " return (%s)eax;", |
| 7059 | g_func_pp->ret_type.name); |
| 7060 | } |
| 7061 | else if (IS(g_func_pp->ret_type.name, "__int64")) |
| 7062 | fprintf(fout, " return ((u64)edx << 32) | eax;"); |
| 7063 | else |
| 7064 | fprintf(fout, " return eax;"); |
| 7065 | |
| 7066 | last_arith_dst = NULL; |
| 7067 | delayed_flag_op = NULL; |
| 7068 | break; |
| 7069 | |
| 7070 | case OP_PUSH: |
| 7071 | out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]); |
| 7072 | if (po->p_argnum != 0) { |
| 7073 | // special case - saved func arg |
| 7074 | fprintf(fout, " %s = %s;", |
| 7075 | saved_arg_name(buf2, sizeof(buf2), |
| 7076 | po->p_arggrp, po->p_argnum), buf1); |
| 7077 | break; |
| 7078 | } |
| 7079 | else if (po->flags & OPF_RSAVE) { |
| 7080 | fprintf(fout, " s_%s = %s;", buf1, buf1); |
| 7081 | break; |
| 7082 | } |
| 7083 | else if (po->flags & OPF_PPUSH) { |
| 7084 | tmp_op = po->datap; |
| 7085 | ferr_assert(po, tmp_op != NULL); |
| 7086 | out_dst_opr(buf2, sizeof(buf2), po, &tmp_op->operand[0]); |
| 7087 | fprintf(fout, " pp_%s = %s;", buf2, buf1); |
| 7088 | break; |
| 7089 | } |
| 7090 | else if (g_func_pp->is_userstack) { |
| 7091 | fprintf(fout, " *(--esp) = %s;", buf1); |
| 7092 | break; |
| 7093 | } |
| 7094 | if (!(g_ida_func_attr & IDAFA_NORETURN)) |
| 7095 | ferr(po, "stray push encountered\n"); |
| 7096 | no_output = 1; |
| 7097 | break; |
| 7098 | |
| 7099 | case OP_POP: |
| 7100 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); |
| 7101 | if (po->flags & OPF_RSAVE) { |
| 7102 | fprintf(fout, " %s = s_%s;", buf1, buf1); |
| 7103 | break; |
| 7104 | } |
| 7105 | else if (po->flags & OPF_PPUSH) { |
| 7106 | // push/pop graph / non-const |
| 7107 | ferr_assert(po, po->datap == NULL); |
| 7108 | fprintf(fout, " %s = pp_%s;", buf1, buf1); |
| 7109 | break; |
| 7110 | } |
| 7111 | else if (po->datap != NULL) { |
| 7112 | // push/pop pair |
| 7113 | tmp_op = po->datap; |
| 7114 | fprintf(fout, " %s = %s;", buf1, |
| 7115 | out_src_opr(buf2, sizeof(buf2), |
| 7116 | tmp_op, &tmp_op->operand[0], |
| 7117 | default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0)); |
| 7118 | break; |
| 7119 | } |
| 7120 | else if (g_func_pp->is_userstack) { |
| 7121 | fprintf(fout, " %s = *esp++;", buf1); |
| 7122 | break; |
| 7123 | } |
| 7124 | else |
| 7125 | ferr(po, "stray pop encountered\n"); |
| 7126 | break; |
| 7127 | |
| 7128 | case OP_NOP: |
| 7129 | no_output = 1; |
| 7130 | break; |
| 7131 | |
| 7132 | // pseudo ops |
| 7133 | case OPP_ALLSHL: |
| 7134 | case OPP_ALLSHR: |
| 7135 | fprintf(fout, " tmp64 = ((u64)edx << 32) | eax;\n"); |
| 7136 | fprintf(fout, " tmp64 = (s64)tmp64 %s LOBYTE(ecx);\n", |
| 7137 | po->op == OPP_ALLSHL ? "<<" : ">>"); |
| 7138 | fprintf(fout, " edx = tmp64 >> 32; eax = tmp64;"); |
| 7139 | strcat(g_comment, po->op == OPP_ALLSHL |
| 7140 | ? " allshl" : " allshr"); |
| 7141 | break; |
| 7142 | |
| 7143 | // x87 |
| 7144 | case OP_FLD: |
| 7145 | if (need_float_stack) { |
| 7146 | out_src_opr_float(buf1, sizeof(buf1), |
| 7147 | po, &po->operand[0], 1); |
| 7148 | if (po->regmask_src & mxSTa) { |
| 7149 | fprintf(fout, " f_st[(f_stp - 1) & 7] = %s; f_stp--;", |
| 7150 | buf1); |
| 7151 | } |
| 7152 | else |
| 7153 | fprintf(fout, " f_st[--f_stp & 7] = %s;", buf1); |
| 7154 | } |
| 7155 | else { |
| 7156 | if (po->flags & OPF_FSHIFT) |
| 7157 | fprintf(fout, " f_st1 = f_st0;"); |
| 7158 | if (po->operand[0].type == OPT_REG |
| 7159 | && po->operand[0].reg == xST0) |
| 7160 | { |
| 7161 | strcat(g_comment, " fld st"); |
| 7162 | break; |
| 7163 | } |
| 7164 | fprintf(fout, " f_st0 = %s;", |
| 7165 | out_src_opr_float(buf1, sizeof(buf1), |
| 7166 | po, &po->operand[0], 0)); |
| 7167 | } |
| 7168 | strcat(g_comment, " fld"); |
| 7169 | break; |
| 7170 | |
| 7171 | case OP_FILD: |
| 7172 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], |
| 7173 | lmod_cast(po, po->operand[0].lmod, 1), 0); |
| 7174 | snprintf(buf2, sizeof(buf2), "(%s)%s", float_type, buf1); |
| 7175 | if (need_float_stack) { |
| 7176 | fprintf(fout, " f_st[--f_stp & 7] = %s;", buf2); |
| 7177 | } |
| 7178 | else { |
| 7179 | if (po->flags & OPF_FSHIFT) |
| 7180 | fprintf(fout, " f_st1 = f_st0;"); |
| 7181 | fprintf(fout, " f_st0 = %s;", buf2); |
| 7182 | } |
| 7183 | strcat(g_comment, " fild"); |
| 7184 | break; |
| 7185 | |
| 7186 | case OP_FLDc: |
| 7187 | if (need_float_stack) |
| 7188 | fprintf(fout, " f_st[--f_stp & 7] = "); |
| 7189 | else { |
| 7190 | if (po->flags & OPF_FSHIFT) |
| 7191 | fprintf(fout, " f_st1 = f_st0;"); |
| 7192 | fprintf(fout, " f_st0 = "); |
| 7193 | } |
| 7194 | switch (po->operand[0].val) { |
| 7195 | case X87_CONST_1: fprintf(fout, "1.0;"); break; |
| 7196 | case X87_CONST_LN2: fprintf(fout, "0.693147180559945;"); break; |
| 7197 | case X87_CONST_Z: fprintf(fout, "0.0;"); break; |
| 7198 | default: ferr(po, "TODO\n"); break; |
| 7199 | } |
| 7200 | break; |
| 7201 | |
| 7202 | case OP_FST: |
| 7203 | if (po->flags & OPF_FARG) { |
| 7204 | // store to stack as func arg |
| 7205 | snprintf(buf1, sizeof(buf1), "fs_%d", po->p_argnum); |
| 7206 | dead_dst = 0; |
| 7207 | } |
| 7208 | else { |
| 7209 | out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0], |
| 7210 | need_float_stack); |
| 7211 | dead_dst = po->operand[0].type == OPT_REG |
| 7212 | && po->operand[0].reg == xST0; |
| 7213 | } |
| 7214 | if (!dead_dst) |
| 7215 | fprintf(fout, " %s = %s;", buf1, float_st0); |
| 7216 | if (po->flags & OPF_FSHIFT) { |
| 7217 | if (need_float_stack) |
| 7218 | fprintf(fout, " f_stp++;"); |
| 7219 | else |
| 7220 | fprintf(fout, " f_st0 = f_st1;"); |
| 7221 | } |
| 7222 | if (dead_dst && !(po->flags & OPF_FSHIFT)) |
| 7223 | no_output = 1; |
| 7224 | else |
| 7225 | strcat(g_comment, " fst"); |
| 7226 | break; |
| 7227 | |
| 7228 | case OP_FIST: |
| 7229 | fprintf(fout, " %s = %s%s;", |
| 7230 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), |
| 7231 | lmod_cast(po, po->operand[0].lmod, 1), float_st0); |
| 7232 | if (po->flags & OPF_FSHIFT) { |
| 7233 | if (need_float_stack) |
| 7234 | fprintf(fout, " f_stp++;"); |
| 7235 | else |
| 7236 | fprintf(fout, " f_st0 = f_st1;"); |
| 7237 | } |
| 7238 | strcat(g_comment, " fist"); |
| 7239 | break; |
| 7240 | |
| 7241 | case OP_FADD: |
| 7242 | case OP_FDIV: |
| 7243 | case OP_FMUL: |
| 7244 | case OP_FSUB: |
| 7245 | out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0], |
| 7246 | need_float_stack); |
| 7247 | out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1], |
| 7248 | need_float_stack); |
| 7249 | dead_dst = (po->flags & OPF_FPOP) |
| 7250 | && po->operand[0].type == OPT_REG |
| 7251 | && po->operand[0].reg == xST0; |
| 7252 | switch (po->op) { |
| 7253 | case OP_FADD: j = '+'; break; |
| 7254 | case OP_FDIV: j = '/'; break; |
| 7255 | case OP_FMUL: j = '*'; break; |
| 7256 | case OP_FSUB: j = '-'; break; |
| 7257 | default: j = 'x'; break; |
| 7258 | } |
| 7259 | if (need_float_stack) { |
| 7260 | if (!dead_dst) |
| 7261 | fprintf(fout, " %s %c= %s;", buf1, j, buf2); |
| 7262 | if (po->flags & OPF_FSHIFT) |
| 7263 | fprintf(fout, " f_stp++;"); |
| 7264 | } |
| 7265 | else { |
| 7266 | if (po->flags & OPF_FSHIFT) { |
| 7267 | // note: assumes only 2 regs handled |
| 7268 | if (!dead_dst) |
| 7269 | fprintf(fout, " f_st0 = f_st1 %c f_st0;", j); |
| 7270 | else |
| 7271 | fprintf(fout, " f_st0 = f_st1;"); |
| 7272 | } |
| 7273 | else if (!dead_dst) |
| 7274 | fprintf(fout, " %s %c= %s;", buf1, j, buf2); |
| 7275 | } |
| 7276 | no_output = (dead_dst && !(po->flags & OPF_FSHIFT)); |
| 7277 | break; |
| 7278 | |
| 7279 | case OP_FDIVR: |
| 7280 | case OP_FSUBR: |
| 7281 | out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0], |
| 7282 | need_float_stack); |
| 7283 | out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1], |
| 7284 | need_float_stack); |
| 7285 | out_src_opr_float(buf3, sizeof(buf3), po, &po->operand[0], |
| 7286 | need_float_stack); |
| 7287 | dead_dst = (po->flags & OPF_FPOP) |
| 7288 | && po->operand[0].type == OPT_REG |
| 7289 | && po->operand[0].reg == xST0; |
| 7290 | j = po->op == OP_FDIVR ? '/' : '-'; |
| 7291 | if (need_float_stack) { |
| 7292 | if (!dead_dst) |
| 7293 | fprintf(fout, " %s = %s %c %s;", buf1, buf2, j, buf3); |
| 7294 | if (po->flags & OPF_FSHIFT) |
| 7295 | fprintf(fout, " f_stp++;"); |
| 7296 | } |
| 7297 | else { |
| 7298 | if (po->flags & OPF_FSHIFT) { |
| 7299 | if (!dead_dst) |
| 7300 | fprintf(fout, " f_st0 = f_st0 %c f_st1;", j); |
| 7301 | else |
| 7302 | fprintf(fout, " f_st0 = f_st1;"); |
| 7303 | } |
| 7304 | else if (!dead_dst) |
| 7305 | fprintf(fout, " %s = %s %c %s;", buf1, buf2, j, buf3); |
| 7306 | } |
| 7307 | no_output = (dead_dst && !(po->flags & OPF_FSHIFT)); |
| 7308 | break; |
| 7309 | |
| 7310 | case OP_FIADD: |
| 7311 | case OP_FIDIV: |
| 7312 | case OP_FIMUL: |
| 7313 | case OP_FISUB: |
| 7314 | switch (po->op) { |
| 7315 | case OP_FIADD: j = '+'; break; |
| 7316 | case OP_FIDIV: j = '/'; break; |
| 7317 | case OP_FIMUL: j = '*'; break; |
| 7318 | case OP_FISUB: j = '-'; break; |
| 7319 | default: j = 'x'; break; |
| 7320 | } |
| 7321 | fprintf(fout, " %s %c= (%s)%s;", float_st0, |
| 7322 | j, float_type, |
| 7323 | out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], |
| 7324 | lmod_cast(po, po->operand[0].lmod, 1), 0)); |
| 7325 | break; |
| 7326 | |
| 7327 | case OP_FIDIVR: |
| 7328 | case OP_FISUBR: |
| 7329 | fprintf(fout, " %s = %s %c %s;", float_st0, |
| 7330 | out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1], |
| 7331 | need_float_stack), |
| 7332 | po->op == OP_FIDIVR ? '/' : '-', float_st0); |
| 7333 | break; |
| 7334 | |
| 7335 | case OP_FCOM: { |
| 7336 | int mask, z_check; |
| 7337 | ferr_assert(po, po->datap != NULL); |
| 7338 | mask = (long)po->datap & 0xffff; |
| 7339 | z_check = ((long)po->datap >> 16) & 1; |
| 7340 | out_src_opr_float(buf1, sizeof(buf1), po, &po->operand[0], |
| 7341 | need_float_stack); |
| 7342 | if (mask == 0x0100) { // C0 -> < |
| 7343 | fprintf(fout, " f_sw = %s < %s ? 0x0100 : 0;", |
| 7344 | float_st0, buf1); |
| 7345 | } |
| 7346 | else if (mask == 0x4000) { // C3 -> = |
| 7347 | fprintf(fout, " f_sw = %s == %s ? 0x4000 : 0;", |
| 7348 | float_st0, buf1); |
| 7349 | } |
| 7350 | else if (mask == 0x4100) { // C3, C0 |
| 7351 | if (z_check) { |
| 7352 | fprintf(fout, " f_sw = %s <= %s ? 0x4100 : 0;", |
| 7353 | float_st0, buf1); |
| 7354 | strcat(g_comment, " z_chk_det"); |
| 7355 | } |
| 7356 | else { |
| 7357 | fprintf(fout, " f_sw = %s == %s ? 0x4000 : " |
| 7358 | "(%s < %s ? 0x0100 : 0);", |
| 7359 | float_st0, buf1, float_st0, buf1); |
| 7360 | } |
| 7361 | } |
| 7362 | else |
| 7363 | ferr(po, "unhandled sw mask: %x\n", mask); |
| 7364 | if (po->flags & OPF_FSHIFT) { |
| 7365 | if (need_float_stack) |
| 7366 | fprintf(fout, " f_stp++;"); |
| 7367 | else |
| 7368 | fprintf(fout, " f_st0 = f_st1;"); |
| 7369 | } |
| 7370 | break; |
| 7371 | } |
| 7372 | |
| 7373 | case OP_FNSTSW: |
| 7374 | fprintf(fout, " %s = f_sw;", |
| 7375 | out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); |
| 7376 | break; |
| 7377 | |
| 7378 | case OP_FCHS: |
| 7379 | fprintf(fout, " %s = -%s;", float_st0, float_st0); |
| 7380 | break; |
| 7381 | |
| 7382 | case OP_FCOS: |
| 7383 | fprintf(fout, " %s = cos%s(%s);", float_st0, |
| 7384 | need_double ? "" : "f", float_st0); |
| 7385 | break; |
| 7386 | |
| 7387 | case OP_FPATAN: |
| 7388 | if (need_float_stack) { |
| 7389 | fprintf(fout, " %s = atan%s(%s / %s);", float_st1, |
| 7390 | need_double ? "" : "f", float_st1, float_st0); |
| 7391 | fprintf(fout, " f_stp++;"); |
| 7392 | } |
| 7393 | else { |
| 7394 | fprintf(fout, " f_st0 = atan%s(f_st1 / f_st0);", |
| 7395 | need_double ? "" : "f"); |
| 7396 | } |
| 7397 | break; |
| 7398 | |
| 7399 | case OP_FYL2X: |
| 7400 | if (need_float_stack) { |
| 7401 | fprintf(fout, " %s = %s * log2%s(%s);", float_st1, |
| 7402 | float_st1, need_double ? "" : "f", float_st0); |
| 7403 | fprintf(fout, " f_stp++;"); |
| 7404 | } |
| 7405 | else { |
| 7406 | fprintf(fout, " f_st0 = f_st1 * log2%s(f_st0);", |
| 7407 | need_double ? "" : "f"); |
| 7408 | } |
| 7409 | strcat(g_comment, " fyl2x"); |
| 7410 | break; |
| 7411 | |
| 7412 | case OP_FSIN: |
| 7413 | fprintf(fout, " %s = sin%s(%s);", float_st0, |
| 7414 | need_double ? "" : "f", float_st0); |
| 7415 | break; |
| 7416 | |
| 7417 | case OP_FSQRT: |
| 7418 | fprintf(fout, " %s = sqrt%s(%s);", float_st0, |
| 7419 | need_double ? "" : "f", float_st0); |
| 7420 | break; |
| 7421 | |
| 7422 | case OP_FXCH: |
| 7423 | dead_dst = po->operand[0].type == OPT_REG |
| 7424 | && po->operand[0].reg == xST0; |
| 7425 | if (!dead_dst) { |
| 7426 | out_src_opr_float(buf1, sizeof(buf1), po, &po->operand[0], |
| 7427 | need_float_stack); |
| 7428 | fprintf(fout, " { %s t = %s; %s = %s; %s = t; }", float_type, |
| 7429 | float_st0, float_st0, buf1, buf1); |
| 7430 | strcat(g_comment, " fxch"); |
| 7431 | } |
| 7432 | else |
| 7433 | no_output = 1; |
| 7434 | break; |
| 7435 | |
| 7436 | case OPP_FTOL: |
| 7437 | ferr_assert(po, po->flags & OPF_32BIT); |
| 7438 | fprintf(fout, " eax = (s32)%s;", float_st0); |
| 7439 | if (po->flags & OPF_FSHIFT) { |
| 7440 | if (need_float_stack) |
| 7441 | fprintf(fout, " f_stp++;"); |
| 7442 | else |
| 7443 | fprintf(fout, " f_st0 = f_st1;"); |
| 7444 | } |
| 7445 | strcat(g_comment, " ftol"); |
| 7446 | break; |
| 7447 | |
| 7448 | case OPP_CIPOW: |
| 7449 | if (need_float_stack) { |
| 7450 | fprintf(fout, " %s = pow%s(%s, %s);", float_st1, |
| 7451 | need_double ? "" : "f", float_st1, float_st0); |
| 7452 | fprintf(fout, " f_stp++;"); |
| 7453 | } |
| 7454 | else { |
| 7455 | fprintf(fout, " f_st0 = pow%s(f_st1, f_st0);", |
| 7456 | need_double ? "" : "f"); |
| 7457 | } |
| 7458 | strcat(g_comment, " CIpow"); |
| 7459 | break; |
| 7460 | |
| 7461 | case OPP_ABORT: |
| 7462 | fprintf(fout, " do_skip_code_abort();"); |
| 7463 | break; |
| 7464 | |
| 7465 | // mmx |
| 7466 | case OP_EMMS: |
| 7467 | fprintf(fout, " do_emms();"); |
| 7468 | break; |
| 7469 | |
| 7470 | default: |
| 7471 | no_output = 1; |
| 7472 | ferr(po, "unhandled op type %d, flags %x\n", |
| 7473 | po->op, po->flags); |
| 7474 | break; |
| 7475 | } |
| 7476 | |
| 7477 | if (g_comment[0] != 0) { |
| 7478 | char *p = g_comment; |
| 7479 | while (my_isblank(*p)) |
| 7480 | p++; |
| 7481 | fprintf(fout, " // %s", p); |
| 7482 | g_comment[0] = 0; |
| 7483 | no_output = 0; |
| 7484 | } |
| 7485 | if (!no_output) |
| 7486 | fprintf(fout, "\n"); |
| 7487 | |
| 7488 | // some sanity checking |
| 7489 | if (po->flags & OPF_REP) { |
| 7490 | if (po->op != OP_STOS && po->op != OP_MOVS |
| 7491 | && po->op != OP_CMPS && po->op != OP_SCAS) |
| 7492 | ferr(po, "unexpected rep\n"); |
| 7493 | if (!(po->flags & (OPF_REPZ|OPF_REPNZ)) |
| 7494 | && (po->op == OP_CMPS || po->op == OP_SCAS)) |
| 7495 | ferr(po, "cmps/scas with plain rep\n"); |
| 7496 | } |
| 7497 | if ((po->flags & (OPF_REPZ|OPF_REPNZ)) |
| 7498 | && po->op != OP_CMPS && po->op != OP_SCAS) |
| 7499 | ferr(po, "unexpected repz/repnz\n"); |
| 7500 | |
| 7501 | if (pfomask != 0) |
| 7502 | ferr(po, "missed flag calc, pfomask=%x\n", pfomask); |
| 7503 | |
| 7504 | // see is delayed flag stuff is still valid |
| 7505 | if (delayed_flag_op != NULL && delayed_flag_op != po) { |
| 7506 | if (is_any_opr_modified(delayed_flag_op, po, 0)) |
| 7507 | delayed_flag_op = NULL; |
| 7508 | } |
| 7509 | |
| 7510 | if (last_arith_dst != NULL && last_arith_dst != &po->operand[0]) { |
| 7511 | if (is_opr_modified(last_arith_dst, po)) |
| 7512 | last_arith_dst = NULL; |
| 7513 | } |
| 7514 | |
| 7515 | label_pending = 0; |
| 7516 | } |
| 7517 | |
| 7518 | if (g_stack_fsz && !g_stack_frame_used) |
| 7519 | fprintf(fout, " (void)sf;\n"); |
| 7520 | |
| 7521 | fprintf(fout, "}\n\n"); |
| 7522 | |
| 7523 | gen_x_cleanup(opcnt); |
| 7524 | } |
| 7525 | |
| 7526 | static void gen_x_cleanup(int opcnt) |
| 7527 | { |
| 7528 | int i; |
| 7529 | |
| 7530 | for (i = 0; i < opcnt; i++) { |
| 7531 | struct label_ref *lr, *lr_del; |
| 7532 | |
| 7533 | lr = g_label_refs[i].next; |
| 7534 | while (lr != NULL) { |
| 7535 | lr_del = lr; |
| 7536 | lr = lr->next; |
| 7537 | free(lr_del); |
| 7538 | } |
| 7539 | g_label_refs[i].i = -1; |
| 7540 | g_label_refs[i].next = NULL; |
| 7541 | |
| 7542 | if (ops[i].op == OP_CALL) { |
| 7543 | if (ops[i].pp) |
| 7544 | proto_release(ops[i].pp); |
| 7545 | } |
| 7546 | } |
| 7547 | g_func_pp = NULL; |
| 7548 | } |
| 7549 | |
| 7550 | struct func_proto_dep; |
| 7551 | |
| 7552 | struct func_prototype { |
| 7553 | char name[NAMELEN]; |
| 7554 | int id; |
| 7555 | int argc_stack; |
| 7556 | int regmask_dep; |
| 7557 | int has_ret:3; // -1, 0, 1: unresolved, no, yes |
| 7558 | unsigned int dep_resolved:1; |
| 7559 | unsigned int is_stdcall:1; |
| 7560 | struct func_proto_dep *dep_func; |
| 7561 | int dep_func_cnt; |
| 7562 | const struct parsed_proto *pp; // seed pp, if any |
| 7563 | }; |
| 7564 | |
| 7565 | struct func_proto_dep { |
| 7566 | char *name; |
| 7567 | struct func_prototype *proto; |
| 7568 | int regmask_live; // .. at the time of call |
| 7569 | unsigned int ret_dep:1; // return from this is caller's return |
| 7570 | }; |
| 7571 | |
| 7572 | static struct func_prototype *hg_fp; |
| 7573 | static int hg_fp_cnt; |
| 7574 | |
| 7575 | static struct scanned_var { |
| 7576 | char name[NAMELEN]; |
| 7577 | enum opr_lenmod lmod; |
| 7578 | unsigned int is_seeded:1; |
| 7579 | unsigned int is_c_str:1; |
| 7580 | const struct parsed_proto *pp; // seed pp, if any |
| 7581 | } *hg_vars; |
| 7582 | static int hg_var_cnt; |
| 7583 | |
| 7584 | static char **hg_refs; |
| 7585 | static int hg_ref_cnt; |
| 7586 | |
| 7587 | static void output_hdr_fp(FILE *fout, const struct func_prototype *fp, |
| 7588 | int count); |
| 7589 | |
| 7590 | static struct func_prototype *hg_fp_add(const char *funcn) |
| 7591 | { |
| 7592 | struct func_prototype *fp; |
| 7593 | |
| 7594 | if ((hg_fp_cnt & 0xff) == 0) { |
| 7595 | hg_fp = realloc(hg_fp, sizeof(hg_fp[0]) * (hg_fp_cnt + 0x100)); |
| 7596 | my_assert_not(hg_fp, NULL); |
| 7597 | memset(hg_fp + hg_fp_cnt, 0, sizeof(hg_fp[0]) * 0x100); |
| 7598 | } |
| 7599 | |
| 7600 | fp = &hg_fp[hg_fp_cnt]; |
| 7601 | snprintf(fp->name, sizeof(fp->name), "%s", funcn); |
| 7602 | fp->id = hg_fp_cnt; |
| 7603 | fp->argc_stack = -1; |
| 7604 | hg_fp_cnt++; |
| 7605 | |
| 7606 | return fp; |
| 7607 | } |
| 7608 | |
| 7609 | static struct func_proto_dep *hg_fp_find_dep(struct func_prototype *fp, |
| 7610 | const char *name) |
| 7611 | { |
| 7612 | int i; |
| 7613 | |
| 7614 | for (i = 0; i < fp->dep_func_cnt; i++) |
| 7615 | if (IS(fp->dep_func[i].name, name)) |
| 7616 | return &fp->dep_func[i]; |
| 7617 | |
| 7618 | return NULL; |
| 7619 | } |
| 7620 | |
| 7621 | static void hg_fp_add_dep(struct func_prototype *fp, const char *name) |
| 7622 | { |
| 7623 | // is it a dupe? |
| 7624 | if (hg_fp_find_dep(fp, name)) |
| 7625 | return; |
| 7626 | |
| 7627 | if ((fp->dep_func_cnt & 0xff) == 0) { |
| 7628 | fp->dep_func = realloc(fp->dep_func, |
| 7629 | sizeof(fp->dep_func[0]) * (fp->dep_func_cnt + 0x100)); |
| 7630 | my_assert_not(fp->dep_func, NULL); |
| 7631 | memset(&fp->dep_func[fp->dep_func_cnt], 0, |
| 7632 | sizeof(fp->dep_func[0]) * 0x100); |
| 7633 | } |
| 7634 | fp->dep_func[fp->dep_func_cnt].name = strdup(name); |
| 7635 | fp->dep_func_cnt++; |
| 7636 | } |
| 7637 | |
| 7638 | static int hg_fp_cmp_name(const void *p1_, const void *p2_) |
| 7639 | { |
| 7640 | const struct func_prototype *p1 = p1_, *p2 = p2_; |
| 7641 | return strcmp(p1->name, p2->name); |
| 7642 | } |
| 7643 | |
| 7644 | #if 0 |
| 7645 | static int hg_fp_cmp_id(const void *p1_, const void *p2_) |
| 7646 | { |
| 7647 | const struct func_prototype *p1 = p1_, *p2 = p2_; |
| 7648 | return p1->id - p2->id; |
| 7649 | } |
| 7650 | #endif |
| 7651 | |
| 7652 | static void hg_ref_add(const char *name) |
| 7653 | { |
| 7654 | if ((hg_ref_cnt & 0xff) == 0) { |
| 7655 | hg_refs = realloc(hg_refs, sizeof(hg_refs[0]) * (hg_ref_cnt + 0x100)); |
| 7656 | my_assert_not(hg_refs, NULL); |
| 7657 | memset(hg_refs + hg_ref_cnt, 0, sizeof(hg_refs[0]) * 0x100); |
| 7658 | } |
| 7659 | |
| 7660 | hg_refs[hg_ref_cnt] = strdup(name); |
| 7661 | my_assert_not(hg_refs[hg_ref_cnt], NULL); |
| 7662 | hg_ref_cnt++; |
| 7663 | } |
| 7664 | |
| 7665 | // recursive register dep pass |
| 7666 | // - track saved regs (part 2) |
| 7667 | // - try to figure out arg-regs |
| 7668 | // - calculate reg deps |
| 7669 | static void gen_hdr_dep_pass(int i, int opcnt, unsigned char *cbits, |
| 7670 | struct func_prototype *fp, int regmask_save, int regmask_dst, |
| 7671 | int *regmask_dep, int *has_ret) |
| 7672 | { |
| 7673 | struct func_proto_dep *dep; |
| 7674 | struct parsed_op *po; |
| 7675 | int from_caller = 0; |
| 7676 | int j, l; |
| 7677 | int reg; |
| 7678 | int ret; |
| 7679 | |
| 7680 | for (; i < opcnt; i++) |
| 7681 | { |
| 7682 | if (cbits[i >> 3] & (1 << (i & 7))) |
| 7683 | return; |
| 7684 | cbits[i >> 3] |= (1 << (i & 7)); |
| 7685 | |
| 7686 | po = &ops[i]; |
| 7687 | |
| 7688 | if ((po->flags & OPF_JMP) && po->op != OP_CALL) { |
| 7689 | if (po->flags & OPF_RMD) |
| 7690 | continue; |
| 7691 | |
| 7692 | if (po->btj != NULL) { |
| 7693 | // jumptable |
| 7694 | for (j = 0; j < po->btj->count; j++) { |
| 7695 | check_i(po, po->btj->d[j].bt_i); |
| 7696 | gen_hdr_dep_pass(po->btj->d[j].bt_i, opcnt, cbits, fp, |
| 7697 | regmask_save, regmask_dst, regmask_dep, has_ret); |
| 7698 | } |
| 7699 | return; |
| 7700 | } |
| 7701 | |
| 7702 | check_i(po, po->bt_i); |
| 7703 | if (po->flags & OPF_CJMP) { |
| 7704 | gen_hdr_dep_pass(po->bt_i, opcnt, cbits, fp, |
| 7705 | regmask_save, regmask_dst, regmask_dep, has_ret); |
| 7706 | } |
| 7707 | else { |
| 7708 | i = po->bt_i - 1; |
| 7709 | } |
| 7710 | continue; |
| 7711 | } |
| 7712 | |
| 7713 | if (po->flags & OPF_FARG) |
| 7714 | /* (just calculate register deps) */; |
| 7715 | else if (po->op == OP_PUSH && po->operand[0].type == OPT_REG) |
| 7716 | { |
| 7717 | reg = po->operand[0].reg; |
| 7718 | ferr_assert(po, reg >= 0); |
| 7719 | |
| 7720 | if (po->flags & OPF_RSAVE) { |
| 7721 | regmask_save |= 1 << reg; |
| 7722 | continue; |
| 7723 | } |
| 7724 | if (po->flags & OPF_DONE) |
| 7725 | continue; |
| 7726 | |
| 7727 | ret = scan_for_pop(i + 1, opcnt, i + opcnt * 2, reg, 0, 0, 0); |
| 7728 | if (ret == 1) { |
| 7729 | regmask_save |= 1 << reg; |
| 7730 | po->flags |= OPF_RMD; |
| 7731 | scan_for_pop(i + 1, opcnt, i + opcnt * 3, reg, 0, 0, OPF_RMD); |
| 7732 | continue; |
| 7733 | } |
| 7734 | } |
| 7735 | else if (po->flags & OPF_RMD) |
| 7736 | continue; |
| 7737 | else if (po->op == OP_CALL) { |
| 7738 | po->regmask_dst |= 1 << xAX; |
| 7739 | |
| 7740 | dep = hg_fp_find_dep(fp, po->operand[0].name); |
| 7741 | if (dep != NULL) |
| 7742 | dep->regmask_live = regmask_save | regmask_dst; |
| 7743 | } |
| 7744 | else if (po->op == OP_RET) { |
| 7745 | if (po->operand_cnt > 0) { |
| 7746 | fp->is_stdcall = 1; |
| 7747 | if (fp->argc_stack >= 0 |
| 7748 | && fp->argc_stack != po->operand[0].val / 4) |
| 7749 | ferr(po, "ret mismatch? (%d)\n", fp->argc_stack * 4); |
| 7750 | fp->argc_stack = po->operand[0].val / 4; |
| 7751 | } |
| 7752 | } |
| 7753 | |
| 7754 | // if has_ret is 0, there is uninitialized eax path, |
| 7755 | // which means it's most likely void func |
| 7756 | if (*has_ret != 0 && (po->flags & OPF_TAIL)) { |
| 7757 | if (po->op == OP_CALL) { |
| 7758 | j = i; |
| 7759 | ret = 1; |
| 7760 | } |
| 7761 | else { |
| 7762 | struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, xAX); |
| 7763 | j = -1; |
| 7764 | from_caller = 0; |
| 7765 | ret = resolve_origin(i, &opr, i + opcnt * 4, &j, &from_caller); |
| 7766 | } |
| 7767 | |
| 7768 | if (ret != 1 && from_caller) { |
| 7769 | // unresolved eax - probably void func |
| 7770 | *has_ret = 0; |
| 7771 | } |
| 7772 | else { |
| 7773 | if (j >= 0 && ops[j].op == OP_CALL) { |
| 7774 | dep = hg_fp_find_dep(fp, ops[j].operand[0].name); |
| 7775 | if (dep != NULL) |
| 7776 | dep->ret_dep = 1; |
| 7777 | else |
| 7778 | *has_ret = 1; |
| 7779 | } |
| 7780 | else |
| 7781 | *has_ret = 1; |
| 7782 | } |
| 7783 | } |
| 7784 | |
| 7785 | l = regmask_save | regmask_dst; |
| 7786 | if (g_bp_frame && !(po->flags & OPF_EBP_S)) |
| 7787 | l |= 1 << xBP; |
| 7788 | |
| 7789 | l = po->regmask_src & ~l; |
| 7790 | #if 0 |
| 7791 | if (l) |
| 7792 | fnote(po, "dep |= %04x, dst %04x, save %04x (f %x)\n", |
| 7793 | l, regmask_dst, regmask_save, po->flags); |
| 7794 | #endif |
| 7795 | *regmask_dep |= l; |
| 7796 | regmask_dst |= po->regmask_dst; |
| 7797 | |
| 7798 | if (po->flags & OPF_TAIL) |
| 7799 | return; |
| 7800 | } |
| 7801 | } |
| 7802 | |
| 7803 | static void gen_hdr(const char *funcn, int opcnt) |
| 7804 | { |
| 7805 | unsigned char cbits[MAX_OPS / 8]; |
| 7806 | const struct parsed_proto *pp_c; |
| 7807 | struct parsed_proto *pp; |
| 7808 | struct func_prototype *fp; |
| 7809 | struct parsed_op *po; |
| 7810 | int regmask_dummy = 0; |
| 7811 | int regmask_dep; |
| 7812 | int max_bp_offset = 0; |
| 7813 | int has_ret; |
| 7814 | int i, j, l; |
| 7815 | int ret; |
| 7816 | |
| 7817 | pp_c = proto_parse(g_fhdr, funcn, 1); |
| 7818 | if (pp_c != NULL) |
| 7819 | // already in seed, will add to hg_fp later |
| 7820 | return; |
| 7821 | |
| 7822 | fp = hg_fp_add(funcn); |
| 7823 | |
| 7824 | g_bp_frame = g_sp_frame = g_stack_fsz = 0; |
| 7825 | g_stack_frame_used = 0; |
| 7826 | |
| 7827 | // pass1: |
| 7828 | // - resolve all branches |
| 7829 | // - parse calls with labels |
| 7830 | resolve_branches_parse_calls(opcnt); |
| 7831 | |
| 7832 | // pass2: |
| 7833 | // - handle ebp/esp frame, remove ops related to it |
| 7834 | scan_prologue_epilogue(opcnt); |
| 7835 | |
| 7836 | // pass3: |
| 7837 | // - remove dead labels |
| 7838 | // - collect calls |
| 7839 | for (i = 0; i < opcnt; i++) |
| 7840 | { |
| 7841 | if (g_labels[i] != NULL && g_label_refs[i].i == -1) { |
| 7842 | free(g_labels[i]); |
| 7843 | g_labels[i] = NULL; |
| 7844 | } |
| 7845 | |
| 7846 | po = &ops[i]; |
| 7847 | if (po->flags & (OPF_RMD|OPF_DONE)) |
| 7848 | continue; |
| 7849 | |
| 7850 | if (po->op == OP_CALL) { |
| 7851 | if (po->operand[0].type == OPT_LABEL) |
| 7852 | hg_fp_add_dep(fp, opr_name(po, 0)); |
| 7853 | else if (po->pp != NULL) |
| 7854 | hg_fp_add_dep(fp, po->pp->name); |
| 7855 | } |
| 7856 | } |
| 7857 | |
| 7858 | // pass4: |
| 7859 | // - remove dead labels |
| 7860 | // - handle push <const>/pop pairs |
| 7861 | for (i = 0; i < opcnt; i++) |
| 7862 | { |
| 7863 | if (g_labels[i] != NULL && g_label_refs[i].i == -1) { |
| 7864 | free(g_labels[i]); |
| 7865 | g_labels[i] = NULL; |
| 7866 | } |
| 7867 | |
| 7868 | po = &ops[i]; |
| 7869 | if (po->flags & (OPF_RMD|OPF_DONE)) |
| 7870 | continue; |
| 7871 | |
| 7872 | if (po->op == OP_PUSH && po->operand[0].type == OPT_CONST) |
| 7873 | scan_for_pop_const(i, opcnt, i + opcnt * 13); |
| 7874 | } |
| 7875 | |
| 7876 | // pass5: |
| 7877 | // - process trivial calls |
| 7878 | for (i = 0; i < opcnt; i++) |
| 7879 | { |
| 7880 | po = &ops[i]; |
| 7881 | if (po->flags & (OPF_RMD|OPF_DONE)) |
| 7882 | continue; |
| 7883 | |
| 7884 | if (po->op == OP_CALL) |
| 7885 | { |
| 7886 | pp = process_call_early(i, opcnt, &j); |
| 7887 | if (pp != NULL) { |
| 7888 | if (!(po->flags & OPF_ATAIL)) |
| 7889 | // since we know the args, try to collect them |
| 7890 | if (collect_call_args_early(i, pp, NULL, NULL) != 0) |
| 7891 | pp = NULL; |
| 7892 | } |
| 7893 | |
| 7894 | if (pp != NULL) { |
| 7895 | if (j >= 0) { |
| 7896 | // commit esp adjust |
| 7897 | if (ops[j].op != OP_POP) |
| 7898 | patch_esp_adjust(&ops[j], pp->argc_stack * 4); |
| 7899 | else { |
| 7900 | for (l = 0; l < pp->argc_stack; l++) |
| 7901 | ops[j + l].flags |= OPF_DONE | OPF_RMD | OPF_NOREGS; |
| 7902 | } |
| 7903 | } |
| 7904 | |
| 7905 | po->flags |= OPF_DONE; |
| 7906 | } |
| 7907 | } |
| 7908 | } |
| 7909 | |
| 7910 | // pass6: |
| 7911 | // - track saved regs (simple) |
| 7912 | // - process calls |
| 7913 | for (i = 0; i < opcnt; i++) |
| 7914 | { |
| 7915 | po = &ops[i]; |
| 7916 | if (po->flags & (OPF_RMD|OPF_DONE)) |
| 7917 | continue; |
| 7918 | |
| 7919 | if (po->op == OP_PUSH && po->operand[0].type == OPT_REG |
| 7920 | && po->operand[0].reg != xCX) |
| 7921 | { |
| 7922 | ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, 0); |
| 7923 | if (ret == 1) { |
| 7924 | // regmask_save |= 1 << po->operand[0].reg; // do it later |
| 7925 | po->flags |= OPF_RSAVE | OPF_RMD | OPF_DONE; |
| 7926 | scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, OPF_RMD); |
| 7927 | } |
| 7928 | } |
| 7929 | else if (po->op == OP_CALL) |
| 7930 | { |
| 7931 | pp = process_call(i, opcnt); |
| 7932 | |
| 7933 | if (!pp->is_unresolved && !(po->flags & OPF_ATAIL)) { |
| 7934 | // since we know the args, collect them |
| 7935 | ret = collect_call_args(po, i, pp, ®mask_dummy, |
| 7936 | i + opcnt * 1); |
| 7937 | } |
| 7938 | } |
| 7939 | } |
| 7940 | |
| 7941 | // pass7 |
| 7942 | memset(cbits, 0, sizeof(cbits)); |
| 7943 | regmask_dep = 0; |
| 7944 | has_ret = -1; |
| 7945 | |
| 7946 | gen_hdr_dep_pass(0, opcnt, cbits, fp, 0, 0, ®mask_dep, &has_ret); |
| 7947 | |
| 7948 | // find unreachable code - must be fixed in IDA |
| 7949 | for (i = 0; i < opcnt; i++) |
| 7950 | { |
| 7951 | if (cbits[i >> 3] & (1 << (i & 7))) |
| 7952 | continue; |
| 7953 | |
| 7954 | if (g_labels[i] == NULL && i > 0 && ops[i - 1].op == OP_CALL |
| 7955 | && ops[i - 1].pp != NULL && ops[i - 1].pp->is_osinc) |
| 7956 | { |
| 7957 | // the compiler sometimes still generates code after |
| 7958 | // noreturn OS functions |
| 7959 | break; |
| 7960 | } |
| 7961 | if (ops[i].op != OP_NOP) |
| 7962 | ferr(&ops[i], "unreachable code\n"); |
| 7963 | } |
| 7964 | |
| 7965 | for (i = 0; i < g_eqcnt; i++) { |
| 7966 | if (g_eqs[i].offset > max_bp_offset && g_eqs[i].offset < 4*32) |
| 7967 | max_bp_offset = g_eqs[i].offset; |
| 7968 | } |
| 7969 | |
| 7970 | if (fp->argc_stack < 0) { |
| 7971 | max_bp_offset = (max_bp_offset + 3) & ~3; |
| 7972 | fp->argc_stack = max_bp_offset / 4; |
| 7973 | if ((g_ida_func_attr & IDAFA_BP_FRAME) && fp->argc_stack > 0) |
| 7974 | fp->argc_stack--; |
| 7975 | } |
| 7976 | |
| 7977 | fp->regmask_dep = regmask_dep & ~((1 << xSP) | mxSTa); |
| 7978 | fp->has_ret = has_ret; |
| 7979 | #if 0 |
| 7980 | printf("// has_ret %d, regmask_dep %x\n", |
| 7981 | fp->has_ret, fp->regmask_dep); |
| 7982 | output_hdr_fp(stdout, fp, 1); |
| 7983 | if (IS(funcn, "sub_10007F72")) exit(1); |
| 7984 | #endif |
| 7985 | |
| 7986 | gen_x_cleanup(opcnt); |
| 7987 | } |
| 7988 | |
| 7989 | static void hg_fp_resolve_deps(struct func_prototype *fp) |
| 7990 | { |
| 7991 | struct func_prototype fp_s; |
| 7992 | int dep; |
| 7993 | int i; |
| 7994 | |
| 7995 | // this thing is recursive, so mark first.. |
| 7996 | fp->dep_resolved = 1; |
| 7997 | |
| 7998 | for (i = 0; i < fp->dep_func_cnt; i++) { |
| 7999 | strcpy(fp_s.name, fp->dep_func[i].name); |
| 8000 | fp->dep_func[i].proto = bsearch(&fp_s, hg_fp, hg_fp_cnt, |
| 8001 | sizeof(hg_fp[0]), hg_fp_cmp_name); |
| 8002 | if (fp->dep_func[i].proto != NULL) { |
| 8003 | if (!fp->dep_func[i].proto->dep_resolved) |
| 8004 | hg_fp_resolve_deps(fp->dep_func[i].proto); |
| 8005 | |
| 8006 | dep = ~fp->dep_func[i].regmask_live |
| 8007 | & fp->dep_func[i].proto->regmask_dep; |
| 8008 | fp->regmask_dep |= dep; |
| 8009 | // printf("dep %s %s |= %x\n", fp->name, |
| 8010 | // fp->dep_func[i].name, dep); |
| 8011 | |
| 8012 | if (fp->has_ret == -1 && fp->dep_func[i].ret_dep) |
| 8013 | fp->has_ret = fp->dep_func[i].proto->has_ret; |
| 8014 | } |
| 8015 | } |
| 8016 | } |
| 8017 | |
| 8018 | // make all thiscall/edx arg functions referenced from .data fastcall |
| 8019 | static void do_func_refs_from_data(void) |
| 8020 | { |
| 8021 | struct func_prototype *fp, fp_s; |
| 8022 | int i; |
| 8023 | |
| 8024 | for (i = 0; i < hg_ref_cnt; i++) { |
| 8025 | strcpy(fp_s.name, hg_refs[i]); |
| 8026 | fp = bsearch(&fp_s, hg_fp, hg_fp_cnt, |
| 8027 | sizeof(hg_fp[0]), hg_fp_cmp_name); |
| 8028 | if (fp == NULL) |
| 8029 | continue; |
| 8030 | |
| 8031 | if (fp->argc_stack != 0 && (fp->regmask_dep & (mxCX | mxDX))) |
| 8032 | fp->regmask_dep |= mxCX | mxDX; |
| 8033 | } |
| 8034 | } |
| 8035 | |
| 8036 | static void output_hdr_fp(FILE *fout, const struct func_prototype *fp, |
| 8037 | int count) |
| 8038 | { |
| 8039 | const struct parsed_proto *pp; |
| 8040 | char *p, namebuf[NAMELEN]; |
| 8041 | const char *name; |
| 8042 | int regmask_dep; |
| 8043 | int argc_normal; |
| 8044 | int j, arg; |
| 8045 | |
| 8046 | for (; count > 0; count--, fp++) { |
| 8047 | if (fp->has_ret == -1) |
| 8048 | fprintf(fout, "// ret unresolved\n"); |
| 8049 | #if 0 |
| 8050 | fprintf(fout, "// dep:"); |
| 8051 | for (j = 0; j < fp->dep_func_cnt; j++) { |
| 8052 | fprintf(fout, " %s/", fp->dep_func[j].name); |
| 8053 | if (fp->dep_func[j].proto != NULL) |
| 8054 | fprintf(fout, "%04x/%d", fp->dep_func[j].proto->regmask_dep, |
| 8055 | fp->dep_func[j].proto->has_ret); |
| 8056 | } |
| 8057 | fprintf(fout, "\n"); |
| 8058 | #endif |
| 8059 | |
| 8060 | p = strchr(fp->name, '@'); |
| 8061 | if (p != NULL) { |
| 8062 | memcpy(namebuf, fp->name, p - fp->name); |
| 8063 | namebuf[p - fp->name] = 0; |
| 8064 | name = namebuf; |
| 8065 | } |
| 8066 | else |
| 8067 | name = fp->name; |
| 8068 | if (name[0] == '_') |
| 8069 | name++; |
| 8070 | |
| 8071 | pp = proto_parse(g_fhdr, name, 1); |
| 8072 | if (pp != NULL && pp->is_include) |
| 8073 | continue; |
| 8074 | |
| 8075 | if (fp->pp != NULL) { |
| 8076 | // part of seed, output later |
| 8077 | continue; |
| 8078 | } |
| 8079 | |
| 8080 | regmask_dep = fp->regmask_dep; |
| 8081 | argc_normal = fp->argc_stack; |
| 8082 | |
| 8083 | fprintf(fout, "%-5s", fp->pp ? fp->pp->ret_type.name : |
| 8084 | (fp->has_ret ? "int" : "void")); |
| 8085 | if (regmask_dep && (fp->is_stdcall || fp->argc_stack > 0) |
| 8086 | && (regmask_dep & ~mxCX) == 0) |
| 8087 | { |
| 8088 | fprintf(fout, "/*__thiscall*/ "); |
| 8089 | argc_normal++; |
| 8090 | regmask_dep = 0; |
| 8091 | } |
| 8092 | else if (regmask_dep && (fp->is_stdcall || fp->argc_stack == 0) |
| 8093 | && (regmask_dep & ~(mxCX | mxDX)) == 0) |
| 8094 | { |
| 8095 | fprintf(fout, " __fastcall "); |
| 8096 | if (!(regmask_dep & (1 << xDX)) && fp->argc_stack == 0) |
| 8097 | argc_normal = 1; |
| 8098 | else |
| 8099 | argc_normal += 2; |
| 8100 | regmask_dep = 0; |
| 8101 | } |
| 8102 | else if (regmask_dep && !fp->is_stdcall) { |
| 8103 | fprintf(fout, "/*__usercall*/ "); |
| 8104 | } |
| 8105 | else if (regmask_dep) { |
| 8106 | fprintf(fout, "/*__userpurge*/ "); |
| 8107 | } |
| 8108 | else if (fp->is_stdcall) |
| 8109 | fprintf(fout, " __stdcall "); |
| 8110 | else |
| 8111 | fprintf(fout, " __cdecl "); |
| 8112 | |
| 8113 | fprintf(fout, "%s(", name); |
| 8114 | |
| 8115 | arg = 0; |
| 8116 | for (j = 0; j < xSP; j++) { |
| 8117 | if (regmask_dep & (1 << j)) { |
| 8118 | arg++; |
| 8119 | if (arg != 1) |
| 8120 | fprintf(fout, ", "); |
| 8121 | if (fp->pp != NULL) |
| 8122 | fprintf(fout, "%s", fp->pp->arg[arg - 1].type.name); |
| 8123 | else |
| 8124 | fprintf(fout, "int"); |
| 8125 | fprintf(fout, " a%d/*<%s>*/", arg, regs_r32[j]); |
| 8126 | } |
| 8127 | } |
| 8128 | |
| 8129 | for (j = 0; j < argc_normal; j++) { |
| 8130 | arg++; |
| 8131 | if (arg != 1) |
| 8132 | fprintf(fout, ", "); |
| 8133 | if (fp->pp != NULL) { |
| 8134 | fprintf(fout, "%s", fp->pp->arg[arg - 1].type.name); |
| 8135 | if (!fp->pp->arg[arg - 1].type.is_ptr) |
| 8136 | fprintf(fout, " "); |
| 8137 | } |
| 8138 | else |
| 8139 | fprintf(fout, "int "); |
| 8140 | fprintf(fout, "a%d", arg); |
| 8141 | } |
| 8142 | |
| 8143 | fprintf(fout, ");\n"); |
| 8144 | } |
| 8145 | } |
| 8146 | |
| 8147 | static void output_hdr(FILE *fout) |
| 8148 | { |
| 8149 | static const char *lmod_c_names[] = { |
| 8150 | [OPLM_UNSPEC] = "???", |
| 8151 | [OPLM_BYTE] = "uint8_t", |
| 8152 | [OPLM_WORD] = "uint16_t", |
| 8153 | [OPLM_DWORD] = "uint32_t", |
| 8154 | [OPLM_QWORD] = "uint64_t", |
| 8155 | }; |
| 8156 | const struct scanned_var *var; |
| 8157 | struct func_prototype *fp; |
| 8158 | char line[256] = { 0, }; |
| 8159 | char name[256]; |
| 8160 | int i; |
| 8161 | |
| 8162 | // add stuff from headers |
| 8163 | for (i = 0; i < pp_cache_size; i++) { |
| 8164 | if (pp_cache[i].is_cinc && !pp_cache[i].is_stdcall) |
| 8165 | snprintf(name, sizeof(name), "_%s", pp_cache[i].name); |
| 8166 | else |
| 8167 | snprintf(name, sizeof(name), "%s", pp_cache[i].name); |
| 8168 | fp = hg_fp_add(name); |
| 8169 | fp->pp = &pp_cache[i]; |
| 8170 | fp->argc_stack = fp->pp->argc_stack; |
| 8171 | fp->is_stdcall = fp->pp->is_stdcall; |
| 8172 | fp->regmask_dep = get_pp_arg_regmask_src(fp->pp); |
| 8173 | fp->has_ret = !IS(fp->pp->ret_type.name, "void"); |
| 8174 | } |
| 8175 | |
| 8176 | // resolve deps |
| 8177 | qsort(hg_fp, hg_fp_cnt, sizeof(hg_fp[0]), hg_fp_cmp_name); |
| 8178 | for (i = 0; i < hg_fp_cnt; i++) |
| 8179 | hg_fp_resolve_deps(&hg_fp[i]); |
| 8180 | |
| 8181 | // adjust functions referenced from data segment |
| 8182 | do_func_refs_from_data(); |
| 8183 | |
| 8184 | // note: messes up .proto ptr, don't use |
| 8185 | //qsort(hg_fp, hg_fp_cnt, sizeof(hg_fp[0]), hg_fp_cmp_id); |
| 8186 | |
| 8187 | // output variables |
| 8188 | for (i = 0; i < hg_var_cnt; i++) { |
| 8189 | var = &hg_vars[i]; |
| 8190 | |
| 8191 | if (var->pp != NULL) |
| 8192 | // part of seed |
| 8193 | continue; |
| 8194 | else if (var->is_c_str) |
| 8195 | fprintf(fout, "extern %-8s %s[];", "char", var->name); |
| 8196 | else |
| 8197 | fprintf(fout, "extern %-8s %s;", |
| 8198 | lmod_c_names[var->lmod], var->name); |
| 8199 | |
| 8200 | if (var->is_seeded) |
| 8201 | fprintf(fout, " // seeded"); |
| 8202 | fprintf(fout, "\n"); |
| 8203 | } |
| 8204 | |
| 8205 | fprintf(fout, "\n"); |
| 8206 | |
| 8207 | // output function prototypes |
| 8208 | output_hdr_fp(fout, hg_fp, hg_fp_cnt); |
| 8209 | |
| 8210 | // seed passthrough |
| 8211 | fprintf(fout, "\n// - seed -\n"); |
| 8212 | |
| 8213 | rewind(g_fhdr); |
| 8214 | while (fgets(line, sizeof(line), g_fhdr)) |
| 8215 | fwrite(line, 1, strlen(line), fout); |
| 8216 | } |
| 8217 | |
| 8218 | // '=' needs special treatment |
| 8219 | // also ' quote |
| 8220 | static char *next_word_s(char *w, size_t wsize, char *s) |
| 8221 | { |
| 8222 | size_t i; |
| 8223 | |
| 8224 | s = sskip(s); |
| 8225 | |
| 8226 | i = 0; |
| 8227 | if (*s == '\'' && s[1] != '\r' && s[1] != '\n') { |
| 8228 | w[0] = s[0]; |
| 8229 | for (i = 1; i < wsize - 1; i++) { |
| 8230 | if (s[i] == 0) { |
| 8231 | printf("warning: missing closing quote: \"%s\"\n", s); |
| 8232 | break; |
| 8233 | } |
| 8234 | if (s[i] == '\'') |
| 8235 | break; |
| 8236 | w[i] = s[i]; |
| 8237 | } |
| 8238 | } |
| 8239 | |
| 8240 | for (; i < wsize - 1; i++) { |
| 8241 | if (s[i] == 0 || my_isblank(s[i]) || (s[i] == '=' && i > 0)) |
| 8242 | break; |
| 8243 | w[i] = s[i]; |
| 8244 | } |
| 8245 | w[i] = 0; |
| 8246 | |
| 8247 | if (s[i] != 0 && !my_isblank(s[i]) && s[i] != '=') |
| 8248 | printf("warning: '%s' truncated\n", w); |
| 8249 | |
| 8250 | return s + i; |
| 8251 | } |
| 8252 | |
| 8253 | static int cmpstringp(const void *p1, const void *p2) |
| 8254 | { |
| 8255 | return strcmp(*(char * const *)p1, *(char * const *)p2); |
| 8256 | } |
| 8257 | |
| 8258 | static int is_xref_needed(char *p, char **rlist, int rlist_len) |
| 8259 | { |
| 8260 | char *p2; |
| 8261 | |
| 8262 | p = sskip(p); |
| 8263 | if (strstr(p, "...")) |
| 8264 | // unable to determine, assume needed |
| 8265 | return 1; |
| 8266 | |
| 8267 | if (*p == '.') // .text, .data, ... |
| 8268 | // ref from other data or non-function -> no |
| 8269 | return 0; |
| 8270 | |
| 8271 | p2 = strpbrk(p, "+:\r\n\x18"); |
| 8272 | if (p2 != NULL) |
| 8273 | *p2 = 0; |
| 8274 | if (bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp)) |
| 8275 | // referenced from removed code |
| 8276 | return 0; |
| 8277 | |
| 8278 | return 1; |
| 8279 | } |
| 8280 | |
| 8281 | static int ida_xrefs_show_need(FILE *fasm, char *p, |
| 8282 | char **rlist, int rlist_len) |
| 8283 | { |
| 8284 | int found_need = 0; |
| 8285 | char line[256]; |
| 8286 | long pos; |
| 8287 | |
| 8288 | p = strrchr(p, ';'); |
| 8289 | if (p != NULL && *p == ';' && IS_START(p + 2, "DATA XREF: ")) { |
| 8290 | p += 13; |
| 8291 | if (is_xref_needed(p, rlist, rlist_len)) |
| 8292 | return 1; |
| 8293 | } |
| 8294 | |
| 8295 | pos = ftell(fasm); |
| 8296 | while (1) |
| 8297 | { |
| 8298 | if (!my_fgets(line, sizeof(line), fasm)) |
| 8299 | break; |
| 8300 | // non-first line is always indented |
| 8301 | if (!my_isblank(line[0])) |
| 8302 | break; |
| 8303 | |
| 8304 | // should be no content, just comment |
| 8305 | p = sskip(line); |
| 8306 | if (*p != ';') |
| 8307 | break; |
| 8308 | |
| 8309 | p = strrchr(p, ';'); |
| 8310 | p += 2; |
| 8311 | // it's printed once, but no harm to check again |
| 8312 | if (IS_START(p, "DATA XREF: ")) |
| 8313 | p += 11; |
| 8314 | |
| 8315 | if (is_xref_needed(p, rlist, rlist_len)) { |
| 8316 | found_need = 1; |
| 8317 | break; |
| 8318 | } |
| 8319 | } |
| 8320 | fseek(fasm, pos, SEEK_SET); |
| 8321 | return found_need; |
| 8322 | } |
| 8323 | |
| 8324 | static void scan_variables(FILE *fasm, char **rlist, int rlist_len) |
| 8325 | { |
| 8326 | struct scanned_var *var; |
| 8327 | char line[256] = { 0, }; |
| 8328 | char words[4][256]; |
| 8329 | int no_identifier; |
| 8330 | char *p = NULL; |
| 8331 | int wordc; |
| 8332 | int l; |
| 8333 | |
| 8334 | while (!feof(fasm)) |
| 8335 | { |
| 8336 | // skip to next data section |
| 8337 | while (my_fgets(line, sizeof(line), fasm)) |
| 8338 | { |
| 8339 | asmln++; |
| 8340 | |
| 8341 | p = sskip(line); |
| 8342 | if (*p == 0 || *p == ';') |
| 8343 | continue; |
| 8344 | |
| 8345 | p = sskip(next_word_s(words[0], sizeof(words[0]), p)); |
| 8346 | if (*p == 0 || *p == ';') |
| 8347 | continue; |
| 8348 | |
| 8349 | if (*p != 's' || !IS_START(p, "segment para public")) |
| 8350 | continue; |
| 8351 | |
| 8352 | break; |
| 8353 | } |
| 8354 | |
| 8355 | if (p == NULL || !IS_START(p, "segment para public")) |
| 8356 | break; |
| 8357 | p = sskip(p + 19); |
| 8358 | |
| 8359 | if (!IS_START(p, "'DATA'")) |
| 8360 | continue; |
| 8361 | |
| 8362 | // now process it |
| 8363 | while (my_fgets(line, sizeof(line), fasm)) |
| 8364 | { |
| 8365 | asmln++; |
| 8366 | |
| 8367 | p = line; |
| 8368 | no_identifier = my_isblank(*p); |
| 8369 | |
| 8370 | p = sskip(p); |
| 8371 | if (*p == 0 || *p == ';') |
| 8372 | continue; |
| 8373 | |
| 8374 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
| 8375 | words[wordc][0] = 0; |
| 8376 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
| 8377 | if (*p == 0 || *p == ';') { |
| 8378 | wordc++; |
| 8379 | break; |
| 8380 | } |
| 8381 | } |
| 8382 | |
| 8383 | if (wordc == 2 && IS(words[1], "ends")) |
| 8384 | break; |
| 8385 | if (wordc < 2) |
| 8386 | continue; |
| 8387 | |
| 8388 | if (no_identifier) { |
| 8389 | if (wordc >= 3 && IS(words[0], "dd") && IS(words[1], "offset")) |
| 8390 | hg_ref_add(words[2]); |
| 8391 | continue; |
| 8392 | } |
| 8393 | |
| 8394 | if (IS_START(words[0], "__IMPORT_DESCRIPTOR_")) { |
| 8395 | // when this starts, we don't need anything from this section |
| 8396 | break; |
| 8397 | } |
| 8398 | |
| 8399 | // check refs comment(s) |
| 8400 | if (!ida_xrefs_show_need(fasm, p, rlist, rlist_len)) |
| 8401 | continue; |
| 8402 | |
| 8403 | if ((hg_var_cnt & 0xff) == 0) { |
| 8404 | hg_vars = realloc(hg_vars, sizeof(hg_vars[0]) |
| 8405 | * (hg_var_cnt + 0x100)); |
| 8406 | my_assert_not(hg_vars, NULL); |
| 8407 | memset(hg_vars + hg_var_cnt, 0, sizeof(hg_vars[0]) * 0x100); |
| 8408 | } |
| 8409 | |
| 8410 | var = &hg_vars[hg_var_cnt++]; |
| 8411 | snprintf(var->name, sizeof(var->name), "%s", words[0]); |
| 8412 | |
| 8413 | // maybe already in seed header? |
| 8414 | var->pp = proto_parse(g_fhdr, var->name, 1); |
| 8415 | if (var->pp != NULL) { |
| 8416 | if (var->pp->is_fptr) { |
| 8417 | var->lmod = OPLM_DWORD; |
| 8418 | //var->is_ptr = 1; |
| 8419 | } |
| 8420 | else if (var->pp->is_func) |
| 8421 | aerr("func?\n"); |
| 8422 | else if (!guess_lmod_from_c_type(&var->lmod, &var->pp->type)) |
| 8423 | aerr("unhandled C type '%s' for '%s'\n", |
| 8424 | var->pp->type.name, var->name); |
| 8425 | |
| 8426 | var->is_seeded = 1; |
| 8427 | continue; |
| 8428 | } |
| 8429 | |
| 8430 | if (IS(words[1], "dd")) { |
| 8431 | var->lmod = OPLM_DWORD; |
| 8432 | if (wordc >= 4 && IS(words[2], "offset")) |
| 8433 | hg_ref_add(words[3]); |
| 8434 | } |
| 8435 | else if (IS(words[1], "dw")) |
| 8436 | var->lmod = OPLM_WORD; |
| 8437 | else if (IS(words[1], "db")) { |
| 8438 | var->lmod = OPLM_BYTE; |
| 8439 | if (wordc >= 3 && (l = strlen(words[2])) > 4) { |
| 8440 | if (words[2][0] == '\'' && IS(words[2] + l - 2, ",0")) |
| 8441 | var->is_c_str = 1; |
| 8442 | } |
| 8443 | } |
| 8444 | else if (IS(words[1], "dq")) |
| 8445 | var->lmod = OPLM_QWORD; |
| 8446 | //else if (IS(words[1], "dt")) |
| 8447 | else |
| 8448 | aerr("type '%s' not known\n", words[1]); |
| 8449 | } |
| 8450 | } |
| 8451 | |
| 8452 | rewind(fasm); |
| 8453 | asmln = 0; |
| 8454 | } |
| 8455 | |
| 8456 | static void set_label(int i, const char *name) |
| 8457 | { |
| 8458 | const char *p; |
| 8459 | int len; |
| 8460 | |
| 8461 | len = strlen(name); |
| 8462 | p = strchr(name, ':'); |
| 8463 | if (p != NULL) |
| 8464 | len = p - name; |
| 8465 | |
| 8466 | if (g_labels[i] != NULL && !IS_START(g_labels[i], "algn_")) |
| 8467 | aerr("dupe label '%s' vs '%s'?\n", name, g_labels[i]); |
| 8468 | g_labels[i] = realloc(g_labels[i], len + 1); |
| 8469 | my_assert_not(g_labels[i], NULL); |
| 8470 | memcpy(g_labels[i], name, len); |
| 8471 | g_labels[i][len] = 0; |
| 8472 | } |
| 8473 | |
| 8474 | struct chunk_item { |
| 8475 | char *name; |
| 8476 | long fptr; |
| 8477 | int asmln; |
| 8478 | }; |
| 8479 | |
| 8480 | static struct chunk_item *func_chunks; |
| 8481 | static int func_chunk_cnt; |
| 8482 | static int func_chunk_alloc; |
| 8483 | |
| 8484 | static void add_func_chunk(FILE *fasm, const char *name, int line) |
| 8485 | { |
| 8486 | if (func_chunk_cnt >= func_chunk_alloc) { |
| 8487 | func_chunk_alloc *= 2; |
| 8488 | func_chunks = realloc(func_chunks, |
| 8489 | func_chunk_alloc * sizeof(func_chunks[0])); |
| 8490 | my_assert_not(func_chunks, NULL); |
| 8491 | } |
| 8492 | func_chunks[func_chunk_cnt].fptr = ftell(fasm); |
| 8493 | func_chunks[func_chunk_cnt].name = strdup(name); |
| 8494 | func_chunks[func_chunk_cnt].asmln = line; |
| 8495 | func_chunk_cnt++; |
| 8496 | } |
| 8497 | |
| 8498 | static int cmp_chunks(const void *p1, const void *p2) |
| 8499 | { |
| 8500 | const struct chunk_item *c1 = p1, *c2 = p2; |
| 8501 | return strcmp(c1->name, c2->name); |
| 8502 | } |
| 8503 | |
| 8504 | static void scan_ahead(FILE *fasm) |
| 8505 | { |
| 8506 | char words[2][256]; |
| 8507 | char line[256]; |
| 8508 | long oldpos; |
| 8509 | int oldasmln; |
| 8510 | int wordc; |
| 8511 | char *p; |
| 8512 | int i; |
| 8513 | |
| 8514 | oldpos = ftell(fasm); |
| 8515 | oldasmln = asmln; |
| 8516 | |
| 8517 | while (my_fgets(line, sizeof(line), fasm)) |
| 8518 | { |
| 8519 | wordc = 0; |
| 8520 | asmln++; |
| 8521 | |
| 8522 | p = sskip(line); |
| 8523 | if (*p == 0) |
| 8524 | continue; |
| 8525 | |
| 8526 | if (*p == ';') |
| 8527 | { |
| 8528 | // get rid of random tabs |
| 8529 | for (i = 0; line[i] != 0; i++) |
| 8530 | if (line[i] == '\t') |
| 8531 | line[i] = ' '; |
| 8532 | |
| 8533 | if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR ")) |
| 8534 | { |
| 8535 | p += 30; |
| 8536 | next_word(words[0], sizeof(words[0]), p); |
| 8537 | if (words[0][0] == 0) |
| 8538 | aerr("missing name for func chunk?\n"); |
| 8539 | |
| 8540 | add_func_chunk(fasm, words[0], asmln); |
| 8541 | } |
| 8542 | else if (IS_START(p, "; sctend")) |
| 8543 | break; |
| 8544 | |
| 8545 | continue; |
| 8546 | } // *p == ';' |
| 8547 | |
| 8548 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
| 8549 | words[wordc][0] = 0; |
| 8550 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
| 8551 | if (*p == 0 || *p == ';') { |
| 8552 | wordc++; |
| 8553 | break; |
| 8554 | } |
| 8555 | } |
| 8556 | |
| 8557 | if (wordc == 2 && IS(words[1], "ends")) |
| 8558 | break; |
| 8559 | } |
| 8560 | |
| 8561 | fseek(fasm, oldpos, SEEK_SET); |
| 8562 | asmln = oldasmln; |
| 8563 | } |
| 8564 | |
| 8565 | int main(int argc, char *argv[]) |
| 8566 | { |
| 8567 | FILE *fout, *fasm, *frlist; |
| 8568 | struct parsed_data *pd = NULL; |
| 8569 | int pd_alloc = 0; |
| 8570 | char **rlist = NULL; |
| 8571 | int rlist_len = 0; |
| 8572 | int rlist_alloc = 0; |
| 8573 | int func_chunks_used = 0; |
| 8574 | int func_chunks_sorted = 0; |
| 8575 | int func_chunk_i = -1; |
| 8576 | long func_chunk_ret = 0; |
| 8577 | int func_chunk_ret_ln = 0; |
| 8578 | int scanned_ahead = 0; |
| 8579 | char line[256]; |
| 8580 | char words[20][256]; |
| 8581 | enum opr_lenmod lmod; |
| 8582 | char *sctproto = NULL; |
| 8583 | int in_func = 0; |
| 8584 | int pending_endp = 0; |
| 8585 | int skip_code = 0; |
| 8586 | int skip_code_end = 0; |
| 8587 | int skip_warned = 0; |
| 8588 | int eq_alloc; |
| 8589 | int verbose = 0; |
| 8590 | int multi_seg = 0; |
| 8591 | int end = 0; |
| 8592 | int arg_out; |
| 8593 | int arg; |
| 8594 | int pi = 0; |
| 8595 | int i, j; |
| 8596 | int ret, len; |
| 8597 | char *p; |
| 8598 | int wordc; |
| 8599 | |
| 8600 | for (arg = 1; arg < argc; arg++) { |
| 8601 | if (IS(argv[arg], "-v")) |
| 8602 | verbose = 1; |
| 8603 | else if (IS(argv[arg], "-rf")) |
| 8604 | g_allow_regfunc = 1; |
| 8605 | else if (IS(argv[arg], "-uc")) |
| 8606 | g_allow_user_icall = 1; |
| 8607 | else if (IS(argv[arg], "-m")) |
| 8608 | multi_seg = 1; |
| 8609 | else if (IS(argv[arg], "-hdr")) |
| 8610 | g_header_mode = g_quiet_pp = g_allow_regfunc = 1; |
| 8611 | else |
| 8612 | break; |
| 8613 | } |
| 8614 | |
| 8615 | if (argc < arg + 3) { |
| 8616 | printf("usage:\n%s [-v] [-rf] [-m] <.c> <.asm> <hdr.h> [rlist]*\n" |
| 8617 | "%s -hdr <out.h> <.asm> <seed.h> [rlist]*\n" |
| 8618 | "options:\n" |
| 8619 | " -hdr - header generation mode\n" |
| 8620 | " -rf - allow unannotated indirect calls\n" |
| 8621 | " -uc - allow ind. calls/refs to __usercall\n" |
| 8622 | " -m - allow multiple .text sections\n" |
| 8623 | "[rlist] is a file with function names to skip," |
| 8624 | " one per line\n", |
| 8625 | argv[0], argv[0]); |
| 8626 | return 1; |
| 8627 | } |
| 8628 | |
| 8629 | arg_out = arg++; |
| 8630 | |
| 8631 | asmfn = argv[arg++]; |
| 8632 | fasm = fopen(asmfn, "r"); |
| 8633 | my_assert_not(fasm, NULL); |
| 8634 | |
| 8635 | hdrfn = argv[arg++]; |
| 8636 | g_fhdr = fopen(hdrfn, "r"); |
| 8637 | my_assert_not(g_fhdr, NULL); |
| 8638 | |
| 8639 | rlist_alloc = 64; |
| 8640 | rlist = malloc(rlist_alloc * sizeof(rlist[0])); |
| 8641 | my_assert_not(rlist, NULL); |
| 8642 | // needs special handling.. |
| 8643 | rlist[rlist_len++] = "__alloca_probe"; |
| 8644 | |
| 8645 | func_chunk_alloc = 32; |
| 8646 | func_chunks = malloc(func_chunk_alloc * sizeof(func_chunks[0])); |
| 8647 | my_assert_not(func_chunks, NULL); |
| 8648 | |
| 8649 | memset(words, 0, sizeof(words)); |
| 8650 | |
| 8651 | for (; arg < argc; arg++) { |
| 8652 | int skip_func = 0; |
| 8653 | |
| 8654 | frlist = fopen(argv[arg], "r"); |
| 8655 | my_assert_not(frlist, NULL); |
| 8656 | |
| 8657 | while (my_fgets(line, sizeof(line), frlist)) { |
| 8658 | p = sskip(line); |
| 8659 | if (*p == 0 || *p == ';') |
| 8660 | continue; |
| 8661 | if (*p == '#') { |
| 8662 | if (IS_START(p, "#if 0") |
| 8663 | || (g_allow_regfunc && IS_START(p, "#if NO_REGFUNC"))) |
| 8664 | { |
| 8665 | skip_func = 1; |
| 8666 | } |
| 8667 | else if (IS_START(p, "#endif")) |
| 8668 | skip_func = 0; |
| 8669 | continue; |
| 8670 | } |
| 8671 | if (skip_func) |
| 8672 | continue; |
| 8673 | |
| 8674 | p = next_word(words[0], sizeof(words[0]), p); |
| 8675 | if (words[0][0] == 0) |
| 8676 | continue; |
| 8677 | |
| 8678 | if (rlist_len >= rlist_alloc) { |
| 8679 | rlist_alloc = rlist_alloc * 2 + 64; |
| 8680 | rlist = realloc(rlist, rlist_alloc * sizeof(rlist[0])); |
| 8681 | my_assert_not(rlist, NULL); |
| 8682 | } |
| 8683 | rlist[rlist_len++] = strdup(words[0]); |
| 8684 | } |
| 8685 | |
| 8686 | fclose(frlist); |
| 8687 | frlist = NULL; |
| 8688 | } |
| 8689 | |
| 8690 | if (rlist_len > 0) |
| 8691 | qsort(rlist, rlist_len, sizeof(rlist[0]), cmpstringp); |
| 8692 | |
| 8693 | fout = fopen(argv[arg_out], "w"); |
| 8694 | my_assert_not(fout, NULL); |
| 8695 | |
| 8696 | eq_alloc = 128; |
| 8697 | g_eqs = malloc(eq_alloc * sizeof(g_eqs[0])); |
| 8698 | my_assert_not(g_eqs, NULL); |
| 8699 | |
| 8700 | for (i = 0; i < ARRAY_SIZE(g_label_refs); i++) { |
| 8701 | g_label_refs[i].i = -1; |
| 8702 | g_label_refs[i].next = NULL; |
| 8703 | } |
| 8704 | |
| 8705 | if (g_header_mode) |
| 8706 | scan_variables(fasm, rlist, rlist_len); |
| 8707 | |
| 8708 | while (my_fgets(line, sizeof(line), fasm)) |
| 8709 | { |
| 8710 | wordc = 0; |
| 8711 | asmln++; |
| 8712 | |
| 8713 | p = sskip(line); |
| 8714 | if (*p == 0) |
| 8715 | continue; |
| 8716 | |
| 8717 | // get rid of random tabs |
| 8718 | for (i = 0; line[i] != 0; i++) |
| 8719 | if (line[i] == '\t') |
| 8720 | line[i] = ' '; |
| 8721 | |
| 8722 | if (*p == ';') |
| 8723 | { |
| 8724 | if (p[2] == '=' && IS_START(p, "; =============== S U B")) |
| 8725 | goto do_pending_endp; // eww.. |
| 8726 | |
| 8727 | if (p[2] == 'A' && IS_START(p, "; Attributes:")) |
| 8728 | { |
| 8729 | static const char *attrs[] = { |
| 8730 | "bp-based frame", |
| 8731 | "library function", |
| 8732 | "static", |
| 8733 | "noreturn", |
| 8734 | "thunk", |
| 8735 | "fpd=", |
| 8736 | }; |
| 8737 | |
| 8738 | // parse IDA's attribute-list comment |
| 8739 | g_ida_func_attr = 0; |
| 8740 | p = sskip(p + 13); |
| 8741 | |
| 8742 | for (; *p != 0; p = sskip(p)) { |
| 8743 | for (i = 0; i < ARRAY_SIZE(attrs); i++) { |
| 8744 | if (!strncmp(p, attrs[i], strlen(attrs[i]))) { |
| 8745 | g_ida_func_attr |= 1 << i; |
| 8746 | p += strlen(attrs[i]); |
| 8747 | break; |
| 8748 | } |
| 8749 | } |
| 8750 | if (i == ARRAY_SIZE(attrs)) { |
| 8751 | anote("unparsed IDA attr: %s\n", p); |
| 8752 | break; |
| 8753 | } |
| 8754 | if (IS(attrs[i], "fpd=")) { |
| 8755 | p = next_word(words[0], sizeof(words[0]), p); |
| 8756 | // ignore for now.. |
| 8757 | } |
| 8758 | } |
| 8759 | } |
| 8760 | else if (p[2] == 's' && IS_START(p, "; sctattr:")) |
| 8761 | { |
| 8762 | static const char *attrs[] = { |
| 8763 | "clear_sf", |
| 8764 | "clear_regmask", |
| 8765 | }; |
| 8766 | |
| 8767 | // parse manual attribute-list comment |
| 8768 | g_sct_func_attr = 0; |
| 8769 | p = sskip(p + 10); |
| 8770 | |
| 8771 | for (; *p != 0; p = sskip(p)) { |
| 8772 | for (i = 0; i < ARRAY_SIZE(attrs); i++) { |
| 8773 | if (!strncmp(p, attrs[i], strlen(attrs[i]))) { |
| 8774 | g_sct_func_attr |= 1 << i; |
| 8775 | p += strlen(attrs[i]); |
| 8776 | break; |
| 8777 | } |
| 8778 | } |
| 8779 | if (*p == '=') { |
| 8780 | j = ret = 0; |
| 8781 | if (i == 0) |
| 8782 | // clear_sf=start,len (in dwords) |
| 8783 | ret = sscanf(p, "=%d,%d%n", &g_stack_clear_start, |
| 8784 | &g_stack_clear_len, &j); |
| 8785 | else if (i == 1) |
| 8786 | // clear_regmask=<mask> |
| 8787 | ret = sscanf(p, "=%x%n", &g_regmask_init, &j) + 1; |
| 8788 | if (ret < 2) { |
| 8789 | anote("unparsed attr value: %s\n", p); |
| 8790 | break; |
| 8791 | } |
| 8792 | p += j; |
| 8793 | } |
| 8794 | else if (i == ARRAY_SIZE(attrs)) { |
| 8795 | anote("unparsed sct attr: %s\n", p); |
| 8796 | break; |
| 8797 | } |
| 8798 | } |
| 8799 | } |
| 8800 | else if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR ")) |
| 8801 | { |
| 8802 | p += 30; |
| 8803 | next_word(words[0], sizeof(words[0]), p); |
| 8804 | if (words[0][0] == 0) |
| 8805 | aerr("missing name for func chunk?\n"); |
| 8806 | |
| 8807 | if (!scanned_ahead) { |
| 8808 | add_func_chunk(fasm, words[0], asmln); |
| 8809 | func_chunks_sorted = 0; |
| 8810 | } |
| 8811 | } |
| 8812 | else if (p[2] == 'E' && IS_START(p, "; END OF FUNCTION CHUNK")) |
| 8813 | { |
| 8814 | if (func_chunk_i >= 0) { |
| 8815 | if (func_chunk_i < func_chunk_cnt |
| 8816 | && IS(func_chunks[func_chunk_i].name, g_func)) |
| 8817 | { |
| 8818 | // move on to next chunk |
| 8819 | ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET); |
| 8820 | if (ret) |
| 8821 | aerr("seek failed for '%s' chunk #%d\n", |
| 8822 | g_func, func_chunk_i); |
| 8823 | asmln = func_chunks[func_chunk_i].asmln; |
| 8824 | func_chunk_i++; |
| 8825 | } |
| 8826 | else { |
| 8827 | if (func_chunk_ret == 0) |
| 8828 | aerr("no return from chunk?\n"); |
| 8829 | fseek(fasm, func_chunk_ret, SEEK_SET); |
| 8830 | asmln = func_chunk_ret_ln; |
| 8831 | func_chunk_ret = 0; |
| 8832 | pending_endp = 1; |
| 8833 | } |
| 8834 | } |
| 8835 | } |
| 8836 | else if (p[2] == 'F' && IS_START(p, "; FUNCTION CHUNK AT ")) { |
| 8837 | func_chunks_used = 1; |
| 8838 | p += 20; |
| 8839 | if (IS_START(g_func, "sub_")) { |
| 8840 | unsigned long addr = strtoul(p, NULL, 16); |
| 8841 | unsigned long f_addr = strtoul(g_func + 4, NULL, 16); |
| 8842 | if (addr > f_addr && !scanned_ahead) { |
| 8843 | //anote("scan_ahead caused by '%s', addr %lx\n", |
| 8844 | // g_func, addr); |
| 8845 | scan_ahead(fasm); |
| 8846 | scanned_ahead = 1; |
| 8847 | func_chunks_sorted = 0; |
| 8848 | } |
| 8849 | } |
| 8850 | } |
| 8851 | continue; |
| 8852 | } // *p == ';' |
| 8853 | |
| 8854 | parse_words: |
| 8855 | for (i = wordc; i < ARRAY_SIZE(words); i++) |
| 8856 | words[i][0] = 0; |
| 8857 | for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) { |
| 8858 | p = sskip(next_word_s(words[wordc], sizeof(words[0]), p)); |
| 8859 | if (*p == 0 || *p == ';') { |
| 8860 | wordc++; |
| 8861 | break; |
| 8862 | } |
| 8863 | } |
| 8864 | if (*p != 0 && *p != ';') |
| 8865 | aerr("too many words\n"); |
| 8866 | |
| 8867 | if (skip_code_end) { |
| 8868 | skip_code_end = 0; |
| 8869 | skip_code = 0; |
| 8870 | } |
| 8871 | |
| 8872 | // allow asm patches in comments |
| 8873 | if (*p == ';') { |
| 8874 | if (IS_START(p, "; sctpatch:")) { |
| 8875 | p = sskip(p + 11); |
| 8876 | if (*p == 0 || *p == ';') |
| 8877 | continue; |
| 8878 | goto parse_words; // lame |
| 8879 | } |
| 8880 | if (IS_START(p, "; sctproto:")) { |
| 8881 | sctproto = strdup(p + 11); |
| 8882 | } |
| 8883 | else if (IS_START(p, "; sctend")) { |
| 8884 | end = 1; |
| 8885 | if (!pending_endp) |
| 8886 | break; |
| 8887 | } |
| 8888 | else if (IS_START(p, "; sctskip_start")) { |
| 8889 | if (in_func && !g_skip_func) { |
| 8890 | if (!skip_code) { |
| 8891 | ops[pi].op = OPP_ABORT; |
| 8892 | ops[pi].asmln = asmln; |
| 8893 | pi++; |
| 8894 | } |
| 8895 | skip_code = 1; |
| 8896 | } |
| 8897 | } |
| 8898 | else if (IS_START(p, "; sctskip_end")) { |
| 8899 | if (skip_code) |
| 8900 | skip_code_end = 1; |
| 8901 | } |
| 8902 | } |
| 8903 | |
| 8904 | if (wordc == 0) { |
| 8905 | // shouldn't happen |
| 8906 | awarn("wordc == 0?\n"); |
| 8907 | continue; |
| 8908 | } |
| 8909 | |
| 8910 | // don't care about this: |
| 8911 | if (words[0][0] == '.' |
| 8912 | || IS(words[0], "include") |
| 8913 | || IS(words[0], "assume") || IS(words[1], "segment") |
| 8914 | || IS(words[0], "align")) |
| 8915 | { |
| 8916 | continue; |
| 8917 | } |
| 8918 | |
| 8919 | do_pending_endp: |
| 8920 | // do delayed endp processing to collect switch jumptables |
| 8921 | if (pending_endp) { |
| 8922 | if (in_func && !g_skip_func && !end && wordc >= 2 |
| 8923 | && ((words[0][0] == 'd' && words[0][2] == 0) |
| 8924 | || (words[1][0] == 'd' && words[1][2] == 0))) |
| 8925 | { |
| 8926 | i = 1; |
| 8927 | if (words[1][0] == 'd' && words[1][2] == 0) { |
| 8928 | // label |
| 8929 | if (g_func_pd_cnt >= pd_alloc) { |
| 8930 | pd_alloc = pd_alloc * 2 + 16; |
| 8931 | g_func_pd = realloc(g_func_pd, |
| 8932 | sizeof(g_func_pd[0]) * pd_alloc); |
| 8933 | my_assert_not(g_func_pd, NULL); |
| 8934 | } |
| 8935 | pd = &g_func_pd[g_func_pd_cnt]; |
| 8936 | g_func_pd_cnt++; |
| 8937 | memset(pd, 0, sizeof(*pd)); |
| 8938 | strcpy(pd->label, words[0]); |
| 8939 | pd->type = OPT_CONST; |
| 8940 | pd->lmod = lmod_from_directive(words[1]); |
| 8941 | i = 2; |
| 8942 | } |
| 8943 | else { |
| 8944 | if (pd == NULL) { |
| 8945 | if (verbose) |
| 8946 | anote("skipping alignment byte?\n"); |
| 8947 | continue; |
| 8948 | } |
| 8949 | lmod = lmod_from_directive(words[0]); |
| 8950 | if (lmod != pd->lmod) |
| 8951 | aerr("lmod change? %d->%d\n", pd->lmod, lmod); |
| 8952 | } |
| 8953 | |
| 8954 | if (pd->count_alloc < pd->count + wordc) { |
| 8955 | pd->count_alloc = pd->count_alloc * 2 + 14 + wordc; |
| 8956 | pd->d = realloc(pd->d, sizeof(pd->d[0]) * pd->count_alloc); |
| 8957 | my_assert_not(pd->d, NULL); |
| 8958 | } |
| 8959 | for (; i < wordc; i++) { |
| 8960 | if (IS(words[i], "offset")) { |
| 8961 | pd->type = OPT_OFFSET; |
| 8962 | i++; |
| 8963 | } |
| 8964 | p = strchr(words[i], ','); |
| 8965 | if (p != NULL) |
| 8966 | *p = 0; |
| 8967 | if (pd->type == OPT_OFFSET) |
| 8968 | pd->d[pd->count].u.label = strdup(words[i]); |
| 8969 | else |
| 8970 | pd->d[pd->count].u.val = parse_number(words[i]); |
| 8971 | pd->d[pd->count].bt_i = -1; |
| 8972 | pd->count++; |
| 8973 | } |
| 8974 | continue; |
| 8975 | } |
| 8976 | |
| 8977 | if (in_func && !g_skip_func) { |
| 8978 | if (g_header_mode) |
| 8979 | gen_hdr(g_func, pi); |
| 8980 | else |
| 8981 | gen_func(fout, g_fhdr, g_func, pi); |
| 8982 | } |
| 8983 | |
| 8984 | pending_endp = 0; |
| 8985 | in_func = 0; |
| 8986 | g_ida_func_attr = 0; |
| 8987 | g_sct_func_attr = 0; |
| 8988 | g_stack_clear_start = 0; |
| 8989 | g_stack_clear_len = 0; |
| 8990 | g_regmask_init = 0; |
| 8991 | skip_warned = 0; |
| 8992 | g_skip_func = 0; |
| 8993 | g_func[0] = 0; |
| 8994 | func_chunks_used = 0; |
| 8995 | func_chunk_i = -1; |
| 8996 | if (pi != 0) { |
| 8997 | memset(&ops, 0, pi * sizeof(ops[0])); |
| 8998 | clear_labels(pi); |
| 8999 | pi = 0; |
| 9000 | } |
| 9001 | g_eqcnt = 0; |
| 9002 | for (i = 0; i < g_func_pd_cnt; i++) { |
| 9003 | pd = &g_func_pd[i]; |
| 9004 | if (pd->type == OPT_OFFSET) { |
| 9005 | for (j = 0; j < pd->count; j++) |
| 9006 | free(pd->d[j].u.label); |
| 9007 | } |
| 9008 | free(pd->d); |
| 9009 | pd->d = NULL; |
| 9010 | } |
| 9011 | g_func_pd_cnt = 0; |
| 9012 | g_func_lmods = 0; |
| 9013 | pd = NULL; |
| 9014 | |
| 9015 | if (end) |
| 9016 | break; |
| 9017 | if (wordc == 0) |
| 9018 | continue; |
| 9019 | } |
| 9020 | |
| 9021 | if (IS(words[1], "proc")) { |
| 9022 | if (in_func) |
| 9023 | aerr("proc '%s' while in_func '%s'?\n", |
| 9024 | words[0], g_func); |
| 9025 | p = words[0]; |
| 9026 | if (bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp)) |
| 9027 | g_skip_func = 1; |
| 9028 | strcpy(g_func, words[0]); |
| 9029 | set_label(0, words[0]); |
| 9030 | in_func = 1; |
| 9031 | continue; |
| 9032 | } |
| 9033 | |
| 9034 | if (IS(words[1], "endp")) |
| 9035 | { |
| 9036 | if (!in_func) |
| 9037 | aerr("endp '%s' while not in_func?\n", words[0]); |
| 9038 | if (!IS(g_func, words[0])) |
| 9039 | aerr("endp '%s' while in_func '%s'?\n", |
| 9040 | words[0], g_func); |
| 9041 | if (skip_code) |
| 9042 | aerr("endp '%s' while skipping code\n", words[0]); |
| 9043 | |
| 9044 | if ((g_ida_func_attr & IDAFA_THUNK) && pi == 1 |
| 9045 | && ops[0].op == OP_JMP && ops[0].operand[0].had_ds) |
| 9046 | { |
| 9047 | // import jump |
| 9048 | g_skip_func = 1; |
| 9049 | } |
| 9050 | |
| 9051 | if (!g_skip_func && func_chunks_used) { |
| 9052 | // start processing chunks |
| 9053 | struct chunk_item *ci, key = { g_func, 0 }; |
| 9054 | |
| 9055 | func_chunk_ret = ftell(fasm); |
| 9056 | func_chunk_ret_ln = asmln; |
| 9057 | if (!func_chunks_sorted) { |
| 9058 | qsort(func_chunks, func_chunk_cnt, |
| 9059 | sizeof(func_chunks[0]), cmp_chunks); |
| 9060 | func_chunks_sorted = 1; |
| 9061 | } |
| 9062 | ci = bsearch(&key, func_chunks, func_chunk_cnt, |
| 9063 | sizeof(func_chunks[0]), cmp_chunks); |
| 9064 | if (ci == NULL) |
| 9065 | aerr("'%s' needs chunks, but none found\n", g_func); |
| 9066 | func_chunk_i = ci - func_chunks; |
| 9067 | for (; func_chunk_i > 0; func_chunk_i--) |
| 9068 | if (!IS(func_chunks[func_chunk_i - 1].name, g_func)) |
| 9069 | break; |
| 9070 | |
| 9071 | ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET); |
| 9072 | if (ret) |
| 9073 | aerr("seek failed for '%s' chunk #%d\n", g_func, func_chunk_i); |
| 9074 | asmln = func_chunks[func_chunk_i].asmln; |
| 9075 | func_chunk_i++; |
| 9076 | continue; |
| 9077 | } |
| 9078 | pending_endp = 1; |
| 9079 | continue; |
| 9080 | } |
| 9081 | |
| 9082 | if (wordc == 2 && IS(words[1], "ends")) { |
| 9083 | if (!multi_seg) { |
| 9084 | end = 1; |
| 9085 | if (pending_endp) |
| 9086 | goto do_pending_endp; |
| 9087 | break; |
| 9088 | } |
| 9089 | |
| 9090 | // scan for next text segment |
| 9091 | while (my_fgets(line, sizeof(line), fasm)) { |
| 9092 | asmln++; |
| 9093 | p = sskip(line); |
| 9094 | if (*p == 0 || *p == ';') |
| 9095 | continue; |
| 9096 | |
| 9097 | if (strstr(p, "segment para public 'CODE' use32")) |
| 9098 | break; |
| 9099 | } |
| 9100 | |
| 9101 | continue; |
| 9102 | } |
| 9103 | |
| 9104 | p = strchr(words[0], ':'); |
| 9105 | if (p != NULL) { |
| 9106 | set_label(pi, words[0]); |
| 9107 | continue; |
| 9108 | } |
| 9109 | |
| 9110 | if (!in_func || g_skip_func || skip_code) { |
| 9111 | if (!skip_warned && !g_skip_func && g_labels[pi] != NULL) { |
| 9112 | if (verbose) |
| 9113 | anote("skipping from '%s'\n", g_labels[pi]); |
| 9114 | skip_warned = 1; |
| 9115 | } |
| 9116 | free(g_labels[pi]); |
| 9117 | g_labels[pi] = NULL; |
| 9118 | continue; |
| 9119 | } |
| 9120 | |
| 9121 | if (wordc > 1 && IS(words[1], "=")) |
| 9122 | { |
| 9123 | if (wordc != 5) |
| 9124 | aerr("unhandled equ, wc=%d\n", wordc); |
| 9125 | if (g_eqcnt >= eq_alloc) { |
| 9126 | eq_alloc *= 2; |
| 9127 | g_eqs = realloc(g_eqs, eq_alloc * sizeof(g_eqs[0])); |
| 9128 | my_assert_not(g_eqs, NULL); |
| 9129 | } |
| 9130 | |
| 9131 | len = strlen(words[0]); |
| 9132 | if (len > sizeof(g_eqs[0].name) - 1) |
| 9133 | aerr("equ name too long: %d\n", len); |
| 9134 | strcpy(g_eqs[g_eqcnt].name, words[0]); |
| 9135 | |
| 9136 | if (!IS(words[3], "ptr")) |
| 9137 | aerr("unhandled equ\n"); |
| 9138 | if (IS(words[2], "dword")) |
| 9139 | g_eqs[g_eqcnt].lmod = OPLM_DWORD; |
| 9140 | else if (IS(words[2], "word")) |
| 9141 | g_eqs[g_eqcnt].lmod = OPLM_WORD; |
| 9142 | else if (IS(words[2], "byte")) |
| 9143 | g_eqs[g_eqcnt].lmod = OPLM_BYTE; |
| 9144 | else if (IS(words[2], "qword")) |
| 9145 | g_eqs[g_eqcnt].lmod = OPLM_QWORD; |
| 9146 | else |
| 9147 | aerr("bad lmod: '%s'\n", words[2]); |
| 9148 | |
| 9149 | g_eqs[g_eqcnt].offset = parse_number(words[4]); |
| 9150 | g_eqcnt++; |
| 9151 | continue; |
| 9152 | } |
| 9153 | |
| 9154 | if (pi >= ARRAY_SIZE(ops)) |
| 9155 | aerr("too many ops\n"); |
| 9156 | |
| 9157 | parse_op(&ops[pi], words, wordc); |
| 9158 | |
| 9159 | ops[pi].datap = sctproto; |
| 9160 | sctproto = NULL; |
| 9161 | pi++; |
| 9162 | } |
| 9163 | |
| 9164 | if (g_header_mode) |
| 9165 | output_hdr(fout); |
| 9166 | |
| 9167 | fclose(fout); |
| 9168 | fclose(fasm); |
| 9169 | fclose(g_fhdr); |
| 9170 | |
| 9171 | return 0; |
| 9172 | } |
| 9173 | |
| 9174 | // vim:ts=2:shiftwidth=2:expandtab |