X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=tools%2Ftranslate.c;h=a55e6d174d6e723dcede52b3539bf1ad80d67864;hb=4c20744d669982153209773e206c7a1f4ff28689;hp=9922f32996c724ccd21f184db6ea1340dca71017;hpb=e7f5bc393577e0486826a9f913a2825d5c57a2f1;p=ia32rtools.git diff --git a/tools/translate.c b/tools/translate.c index 9922f32..a55e6d1 100644 --- a/tools/translate.c +++ b/tools/translate.c @@ -60,6 +60,9 @@ enum op_flags { OPF_DONE = (1 << 19), /* already fully handled by analysis */ OPF_PPUSH = (1 << 20), /* part of complex push-pop graph */ OPF_NOREGS = (1 << 21), /* don't track regs of this op */ + OPF_FPUSH = (1 << 22), /* pushes x87 stack */ + OPF_FPOP = (1 << 23), /* pops x87 stack */ + OPF_FSHIFT = (1 << 24), /* x87 stack shift is actually needed */ }; enum op_op { @@ -116,11 +119,29 @@ enum op_op { OP_LOOP, OP_JCC, OP_SCC, - // x87 - // mmx - OP_EMMS, - // undefined - OP_UD2, + // x87 + OP_FLD, + OP_FILD, + OP_FLDc, + OP_FST, + OP_FADD, + OP_FDIV, + OP_FMUL, + OP_FSUB, + OP_FDIVR, + OP_FSUBR, + OP_FIADD, + OP_FIDIV, + OP_FIMUL, + OP_FISUB, + OP_FIDIVR, + OP_FISUBR, + // mmx + OP_EMMS, + // pseudo-ops for lib calls + OPP_FTOL, + // undefined + OP_UD2, }; enum opr_type { @@ -187,7 +208,8 @@ struct parsed_op { }; // datap: -// OP_CALL - parser proto hint (str) +// on start: function/data type hint (sctproto) +// after analysis: // (OPF_CC) - points to one of (OPF_FLAGS) that affects cc op // OP_PUSH - points to OP_POP in complex push/pop graph // OP_POP - points to OP_PUSH in simple push/pop pair @@ -227,6 +249,16 @@ enum ida_func_attr { IDAFA_FPD = (1 << 5), }; +enum x87_const { + X87_CONST_1 = 1, + X87_CONST_2T, + X87_CONST_2E, + X87_CONST_PI, + X87_CONST_LG2, + X87_CONST_LN2, + X87_CONST_Z, +}; + // note: limited to 32k due to p_argnext #define MAX_OPS 4096 #define MAX_ARG_GRP 2 @@ -239,6 +271,7 @@ static struct label_ref g_label_refs[MAX_OPS]; static const struct parsed_proto *g_func_pp; static struct parsed_data *g_func_pd; static int g_func_pd_cnt; +static int g_func_lmods; static char g_func[256]; static char g_comment[256]; static int g_bp_frame; @@ -269,12 +302,26 @@ const char *regs_r32[] = { "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp", // not r32, but list here for easy parsing and printing "mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7", + "st", "st(1)", "st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)" }; const char *regs_r16[] = { "ax", "bx", "cx", "dx", "si", "di", "bp", "sp" }; const char *regs_r8l[] = { "al", "bl", "cl", "dl" }; const char *regs_r8h[] = { "ah", "bh", "ch", "dh" }; -enum x86_regs { xUNSPEC = -1, xAX, xBX, xCX, xDX, xSI, xDI, xBP, xSP }; +enum x86_regs { + xUNSPEC = -1, + xAX, xBX, xCX, xDX, + xSI, xDI, xBP, xSP, + xMM0, xMM1, xMM2, xMM3, // mmx + xMM4, xMM5, xMM6, xMM7, + xST0, xST1, xST2, xST3, // x87 + xST4, xST5, xST6, xST7, +}; + +#define mxAX (1 << xAX) +#define mxDX (1 << xDX) +#define mxST0 (1 << xST0) +#define mxST1 (1 << xST1) // possible basic comparison types (without inversion) enum parsed_flag_op { @@ -595,7 +642,7 @@ static char *default_cast_to(char *buf, size_t buf_size, { buf[0] = 0; - if (!opr->is_ptr) + if (!opr->is_ptr || strchr(opr->name, '[')) return buf; if (opr->pp == NULL || opr->pp->type.name == NULL || opr->pp->is_fptr) @@ -753,6 +800,9 @@ static int parse_operand(struct parsed_opr *opr, equ_find(NULL, parse_stack_el(opr->name, NULL, 1), &i); if (eq) opr->lmod = eq->lmod; + + // might be unaligned access + g_func_lmods |= 1 << OPLM_BYTE; } return wordc; } @@ -961,9 +1011,35 @@ static const struct { { "setg", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 }, { "setnle", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 }, // x87 + { "fld", OP_FLD, 1, 1, OPF_FPUSH }, + { "fild", OP_FILD, 1, 1, OPF_FPUSH }, + { "fld1", OP_FLDc, 0, 0, OPF_FPUSH }, + { "fldz", OP_FLDc, 0, 0, OPF_FPUSH }, + { "fstp", OP_FST, 1, 1, OPF_FPOP }, + { "fst", OP_FST, 1, 1, 0 }, + { "fadd", OP_FADD, 0, 2, 0 }, + { "faddp", OP_FADD, 0, 2, OPF_FPOP }, + { "fdiv", OP_FDIV, 0, 2, 0 }, + { "fdivp", OP_FDIV, 0, 2, OPF_FPOP }, + { "fmul", OP_FMUL, 0, 2, 0 }, + { "fmulp", OP_FMUL, 0, 2, OPF_FPOP }, + { "fsub", OP_FSUB, 0, 2, 0 }, + { "fsubp", OP_FSUB, 0, 2, OPF_FPOP }, + { "fdivr", OP_FDIVR, 0, 2, 0 }, + { "fdivrp", OP_FDIVR, 0, 2, OPF_FPOP }, + { "fsubr", OP_FSUBR, 0, 2, 0 }, + { "fsubrp", OP_FSUBR, 0, 2, OPF_FPOP }, + { "fiadd", OP_FIADD, 1, 1, 0 }, + { "fidiv", OP_FIDIV, 1, 1, 0 }, + { "fimul", OP_FIMUL, 1, 1, 0 }, + { "fisub", OP_FISUB, 1, 1, 0 }, + { "fidivr", OP_FIDIVR, 1, 1, 0 }, + { "fisubr", OP_FISUBR, 1, 1, 0 }, // mmx - { "emms", OP_EMMS, 0, 0, OPF_DATA }, - { "movq", OP_MOV, 2, 2, OPF_DATA }, + { "emms", OP_EMMS, 0, 0, OPF_DATA }, + { "movq", OP_MOV, 2, 2, OPF_DATA }, + // pseudo-ops for lib calls + { "_ftol", OPP_FTOL }, // must be last { "ud2", OP_UD2 }, }; @@ -1028,6 +1104,9 @@ static void parse_op(struct parsed_op *op, char words[16][256], int wordc) else op->regmask_src |= regmask; op->regmask_src |= regmask_ind; + + if (op->operand[opr].lmod != OPLM_UNSPEC) + g_func_lmods |= 1 << op->operand[opr].lmod; } if (w < wordc) @@ -1237,6 +1316,56 @@ static void parse_op(struct parsed_op *op, char words[16][256], int wordc) op->regmask_src = 1 << xBP; break; + case OP_FLD: + case OP_FILD: + op->regmask_dst |= mxST0; + break; + + case OP_FLDc: + op->regmask_dst |= mxST0; + if (IS(words[op_w] + 3, "1")) + op->operand[0].val = X87_CONST_1; + else if (IS(words[op_w] + 3, "z")) + op->operand[0].val = X87_CONST_Z; + else + aerr("TODO\n"); + break; + + case OP_FST: + op->regmask_src |= mxST0; + break; + + case OP_FADD: + case OP_FDIV: + case OP_FMUL: + case OP_FSUB: + case OP_FDIVR: + case OP_FSUBR: + op->regmask_src |= mxST0; + if (op->operand_cnt == 2) + op->regmask_src |= op->regmask_dst; + else if (op->operand_cnt == 1) { + memcpy(&op->operand[1], &op->operand[0], sizeof(op->operand[1])); + op->operand[0].type = OPT_REG; + op->operand[0].lmod = OPLM_QWORD; + op->operand[0].reg = xST0; + op->regmask_dst |= mxST0; + } + else + // IDA doesn't use this + aerr("no operands?\n"); + break; + + case OP_FIADD: + case OP_FIDIV: + case OP_FIMUL: + case OP_FISUB: + case OP_FIDIVR: + case OP_FISUBR: + op->regmask_src |= mxST0; + op->regmask_dst |= mxST0; + break; + default: break; } @@ -1786,6 +1915,14 @@ static int stack_frame_access(struct parsed_op *po, snprintf(buf, buf_size, "%ssf.d[%d]", prefix, sf_ofs / 4); break; + case OPLM_QWORD: + ferr_assert(po, !(sf_ofs & 7)); + ferr_assert(po, ofs_reg[0] == 0); + // float callers set is_lea + ferr_assert(po, is_lea); + snprintf(buf, buf_size, "%ssf.q[%d]", prefix, sf_ofs / 8); + break; + default: ferr(po, "bp_stack bad lmod: %d\n", popr->lmod); } @@ -2020,6 +2157,52 @@ static char *out_src_opr_u32(char *buf, size_t buf_size, return out_src_opr(buf, buf_size, po, popr, NULL, 0); } +static char *out_src_opr_float(char *buf, size_t buf_size, + struct parsed_op *po, struct parsed_opr *popr) +{ + const char *cast = NULL; + char tmp[256]; + + switch (popr->type) { + case OPT_REG: + if (popr->reg < xST0 || popr->reg > xST7) + ferr(po, "bad reg: %d\n", popr->reg); + + snprintf(buf, buf_size, "f_st%d", popr->reg - xST0); + break; + + case OPT_REGMEM: + case OPT_LABEL: + case OPT_OFFSET: + switch (popr->lmod) { + case OPLM_QWORD: + cast = "double"; + break; + case OPLM_DWORD: + cast = "float"; + break; + default: + ferr(po, "unhandled lmod: %d\n", popr->lmod); + break; + } + out_src_opr(tmp, sizeof(tmp), po, popr, "", 1); + snprintf(buf, buf_size, "*((%s *)%s)", cast, tmp); + break; + + default: + ferr(po, "invalid float type: %d\n", popr->type); + } + + return buf; +} + +static char *out_dst_opr_float(char *buf, size_t buf_size, + struct parsed_op *po, struct parsed_opr *popr) +{ + // same? + return out_src_opr_float(buf, buf_size, po, popr); +} + static void out_test_for_cc(char *buf, size_t buf_size, struct parsed_op *po, enum parsed_flag_op pfo, int is_inv, enum opr_lenmod lmod, const char *expr) @@ -3270,14 +3453,28 @@ static int get_pp_arg_regmask_dst(const struct parsed_proto *pp) { if (strstr(pp->ret_type.name, "int64")) return (1 << xAX) | (1 << xDX); + if (IS(pp->ret_type.name, "float") + || IS(pp->ret_type.name, "double")) + { + return mxST0; + } if (strcasecmp(pp->ret_type.name, "void") == 0) return 0; - return (1 << xAX); + return mxAX; } static void resolve_branches_parse_calls(int opcnt) { + static const struct { + const char *name; + enum op_op op; + unsigned int flags; + unsigned int regmask_src; + unsigned int regmask_dst; + } pseudo_ops[] = { + { "__ftol", OPP_FTOL, OPF_FPOP, mxST0, mxAX | mxDX }, + }; const struct parsed_proto *pp_c; struct parsed_proto *pp; struct parsed_data *pd; @@ -3292,13 +3489,45 @@ static void resolve_branches_parse_calls(int opcnt) po->bt_i = -1; po->btj = NULL; + if (po->datap != NULL) { + pp = calloc(1, sizeof(*pp)); + my_assert_not(pp, NULL); + + ret = parse_protostr(po->datap, pp); + if (ret < 0) + ferr(po, "bad protostr supplied: %s\n", (char *)po->datap); + free(po->datap); + po->datap = NULL; + po->pp = pp; + } + if (po->op == OP_CALL) { pp = NULL; - if (po->operand[0].type == OPT_LABEL) { + if (po->pp != NULL) + pp = po->pp; + else if (po->operand[0].type == OPT_LABEL) + { tmpname = opr_name(po, 0); if (IS_START(tmpname, "loc_")) ferr(po, "call to loc_*\n"); + + // convert some calls to pseudo-ops + for (l = 0; l < ARRAY_SIZE(pseudo_ops); l++) { + if (!IS(tmpname, pseudo_ops[l].name)) + continue; + + po->op = pseudo_ops[l].op; + po->operand_cnt = 0; + po->regmask_src = pseudo_ops[l].regmask_src; + po->regmask_dst = pseudo_ops[l].regmask_dst; + po->flags = pseudo_ops[l].flags; + po->flags |= po->regmask_dst ? OPF_DATA : 0; + break; + } + if (l < ARRAY_SIZE(pseudo_ops)) + continue; + pp_c = proto_parse(g_fhdr, tmpname, g_header_mode); if (!g_header_mode && pp_c == NULL) ferr(po, "proto_parse failed for call '%s'\n", tmpname); @@ -3308,16 +3537,6 @@ static void resolve_branches_parse_calls(int opcnt) my_assert_not(pp, NULL); } } - else if (po->datap != NULL) { - pp = calloc(1, sizeof(*pp)); - my_assert_not(pp, NULL); - - ret = parse_protostr(po->datap, pp); - if (ret < 0) - ferr(po, "bad protostr supplied: %s\n", (char *)po->datap); - free(po->datap); - po->datap = NULL; - } if (pp != NULL) { if (pp->is_fptr) @@ -3594,36 +3813,11 @@ static void scan_prologue_epilogue(int opcnt) } } -static const struct parsed_proto *resolve_icall(int i, int opcnt, - int *pp_i, int *multi_src) -{ - const struct parsed_proto *pp = NULL; - int search_advice = 0; - - *multi_src = 0; - *pp_i = -1; - - switch (ops[i].operand[0].type) { - case OPT_REGMEM: - case OPT_LABEL: - case OPT_OFFSET: - pp = try_recover_pp(&ops[i], &ops[i].operand[0], &search_advice); - if (!search_advice) - break; - // fallthrough - default: - scan_for_call_type(i, &ops[i].operand[0], i + opcnt * 9, &pp, - pp_i, multi_src); - break; - } - - return pp; -} - // find an instruction that changed opr before i op // *op_i must be set to -1 by the caller -// *entry is set to 1 if one source is determined to be the caller +// *is_caller is set to 1 if one source is determined to be g_func arg // returns 1 if found, *op_i is then set to origin +// returns -1 if multiple origins are found static int resolve_origin(int i, const struct parsed_opr *opr, int magic, int *op_i, int *is_caller) { @@ -3802,6 +3996,96 @@ static int try_resolve_const(int i, const struct parsed_opr *opr, return -1; } +static const struct parsed_proto *resolve_icall(int i, int opcnt, + int *pp_i, int *multi_src) +{ + const struct parsed_proto *pp = NULL; + int search_advice = 0; + int offset = -1; + char name[256]; + char s_reg[4]; + int reg, len; + int ret; + + *multi_src = 0; + *pp_i = -1; + + switch (ops[i].operand[0].type) { + case OPT_REGMEM: + // try to resolve struct member calls + ret = sscanf(ops[i].operand[0].name, "%3s+%x%n", + s_reg, &offset, &len); + if (ret == 2 && len == strlen(ops[i].operand[0].name)) + { + reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s_reg); + if (reg >= 0) { + struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, reg); + int j = -1; + ret = resolve_origin(i, &opr, i + opcnt * 19, &j, NULL); + if (ret != 1) + break; + if (ops[j].op == OP_MOV && ops[j].operand[1].type == OPT_REGMEM + && ops[j].operand[0].lmod == OPLM_DWORD + && ops[j].pp == NULL) // no hint + { + // allow one simple dereference (directx) + reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), + ops[j].operand[1].name); + if (reg < 0) + break; + struct parsed_opr opr2 = OPR_INIT(OPT_REG, OPLM_DWORD, reg); + int k = -1; + ret = resolve_origin(j, &opr2, j + opcnt * 19, &k, NULL); + if (ret != 1) + break; + j = k; + } + if (ops[j].op != OP_MOV) + break; + if (ops[j].operand[0].lmod != OPLM_DWORD) + break; + if (ops[j].pp != NULL) { + // type hint in asm + pp = ops[j].pp; + } + else if (ops[j].operand[1].type == OPT_REGMEM) { + // allow 'hello[ecx]' - assume array of same type items + ret = sscanf(ops[j].operand[1].name, "%[^[][e%2s]", + name, s_reg); + if (ret != 2) + break; + pp = proto_parse(g_fhdr, name, g_quiet_pp); + } + else if (ops[j].operand[1].type == OPT_LABEL) + pp = proto_parse(g_fhdr, ops[j].operand[1].name, g_quiet_pp); + else + break; + if (pp == NULL) + break; + if (pp->is_func || pp->is_fptr || !pp->type.is_struct) { + pp = NULL; + break; + } + pp = proto_lookup_struct(g_fhdr, pp->type.name, offset); + } + break; + } + // fallthrough + case OPT_LABEL: + case OPT_OFFSET: + pp = try_recover_pp(&ops[i], &ops[i].operand[0], &search_advice); + if (!search_advice) + break; + // fallthrough + default: + scan_for_call_type(i, &ops[i].operand[0], i + opcnt * 9, &pp, + pp_i, multi_src); + break; + } + + return pp; +} + static struct parsed_proto *process_call_early(int i, int opcnt, int *adj_i) { @@ -4333,6 +4617,7 @@ static void reg_use_pass(int i, int opcnt, unsigned char *cbits, int *regmask_init, int regmask_arg) { struct parsed_op *po; + unsigned int mask; int already_saved; int regmask_new; int regmask_op; @@ -4437,6 +4722,15 @@ static void reg_use_pass(int i, int opcnt, unsigned char *cbits, if (po->flags & OPF_NOREGS) continue; + if (po->flags & OPF_FPUSH) { + if (regmask_now & mxST1) + ferr(po, "TODO: FPUSH on active ST1\n"); + if (regmask_now & mxST0) + po->flags |= OPF_FSHIFT; + mask = mxST0 | mxST1; + regmask_now = (regmask_now & ~mask) | ((regmask_now & mxST0) << 1); + } + // if incomplete register is used, clear it on init to avoid // later use of uninitialized upper part in some situations if ((po->flags & OPF_DATA) && po->operand[0].type == OPT_REG @@ -4487,8 +4781,21 @@ static void reg_use_pass(int i, int opcnt, unsigned char *cbits, regmask_now |= regmask_op; *regmask |= regmask_now; - if (po->flags & OPF_TAIL) + // released regs + if (po->flags & OPF_FPOP) { + mask = mxST0 | mxST1; + if (!(regmask_now & mask)) + ferr(po, "float pop on empty stack?\n"); + if (regmask_now & mxST1) + po->flags |= OPF_FSHIFT; + regmask_now = (regmask_now & ~mask) | ((regmask_now & mxST1) >> 1); + } + + if (po->flags & OPF_TAIL) { + if (regmask_now & (mxST0 | mxST1)) + ferr(po, "float regs on tail: %x\n", regmask_now); return; + } } } @@ -4742,6 +5049,9 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) po->regmask_src |= get_pp_arg_regmask_src(pp); po->regmask_dst |= get_pp_arg_regmask_dst(pp); + if (po->regmask_dst & mxST0) + po->flags |= OPF_FPUSH; + if (strstr(pp->ret_type.name, "int64")) need_tmp64 = 1; @@ -4932,6 +5242,13 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) } else if (po->op == OP_CLD) po->flags |= OPF_RMD | OPF_DONE; + else if (po->op == OPP_FTOL) { + struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, xDX); + j = -1; + find_next_read(i + 1, opcnt, &opr, i + opcnt * 18, &j); + if (j == -1) + po->flags |= OPF_32BIT; + } if (po->op == OP_RCL || po->op == OP_RCR || po->op == OP_XCHG) need_tmp_var = 1; @@ -5020,8 +5337,14 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) // declare stack frame, va_arg if (g_stack_fsz) { - fprintf(fout, " union { u32 d[%d]; u16 w[%d]; u8 b[%d]; } sf;\n", - (g_stack_fsz + 3) / 4, (g_stack_fsz + 1) / 2, g_stack_fsz); + fprintf(fout, " union { u32 d[%d];", (g_stack_fsz + 3) / 4); + if (g_func_lmods & (1 << OPLM_WORD)) + fprintf(fout, " u16 w[%d];", (g_stack_fsz + 1) / 2); + if (g_func_lmods & (1 << OPLM_BYTE)) + fprintf(fout, " u8 b[%d];", g_stack_fsz); + if (g_func_lmods & (1 << OPLM_QWORD)) + fprintf(fout, " double q[%d];", (g_stack_fsz + 7) / 8); + fprintf(fout, " } sf;\n"); had_decl = 1; } @@ -5074,6 +5397,7 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) } } } + // ... mmx if (regmask_now & 0xff00) { for (reg = 8; reg < 16; reg++) { if (regmask_now & (1 << reg)) { @@ -5085,6 +5409,18 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) } } } + // ... x87 + if (regmask_now & 0xff0000) { + for (reg = 16; reg < 24; reg++) { + if (regmask_now & (1 << reg)) { + fprintf(fout, " double f_st%d", reg - 16); + if (regmask_init & (1 << reg)) + fprintf(fout, " = 0"); + fprintf(fout, ";\n"); + had_decl = 1; + } + } + } if (regmask_save) { for (reg = 0; reg < 8; reg++) { @@ -5659,7 +5995,7 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) fprintf(fout, " cond_c = tmp64 >> 32;\n"); fprintf(fout, " %s = (u32)tmp64;", out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); - strcat(g_comment, "add64"); + strcat(g_comment, " add64"); } else { fprintf(fout, " cond_c = ((u32)%s + %s) >> %d;\n", @@ -5725,7 +6061,7 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) output_std_flags(fout, po, &pfomask, buf1); last_arith_dst = &po->operand[0]; delayed_flag_op = NULL; - strcat(g_comment, "bsf"); + strcat(g_comment, " bsf"); break; case OP_DEC: @@ -5852,7 +6188,7 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) fprintf(fout, " LOWORD(eax) = %s / %s%s;", buf2, cast, buf1); } - strcat(g_comment, "div16"); + strcat(g_comment, " div16"); break; default: ferr(po, "unhandled div lmod %d\n", po->operand[0].lmod); @@ -5892,13 +6228,13 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) case OP_JECXZ: fprintf(fout, " if (ecx == 0)\n"); fprintf(fout, " goto %s;", po->operand[0].name); - strcat(g_comment, "jecxz"); + strcat(g_comment, " jecxz"); break; case OP_LOOP: fprintf(fout, " if (--ecx != 0)\n"); fprintf(fout, " goto %s;", po->operand[0].name); - strcat(g_comment, "loop"); + strcat(g_comment, " loop"); break; case OP_JMP: @@ -5951,17 +6287,22 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) } else if (!IS(pp->ret_type.name, "void")) { if (po->flags & OPF_TAIL) { - if (regmask_ret & (1 << xAX)) { + if (regmask_ret & mxAX) { fprintf(fout, "return "); if (g_func_pp->ret_type.is_ptr != pp->ret_type.is_ptr) fprintf(fout, "(%s)", g_func_pp->ret_type.name); } + else if (regmask_ret & mxST0) + ferr(po, "float tailcall\n"); } - else if (po->regmask_dst & (1 << xAX)) { + else if (po->regmask_dst & mxAX) { fprintf(fout, "eax = "); if (pp->ret_type.is_ptr) fprintf(fout, "(u32)"); } + else if (po->regmask_dst & mxST0) { + fprintf(fout, "f_st0 = "); + } } if (pp->name[0] == 0) @@ -6179,9 +6520,123 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) no_output = 1; break; + // x87 + case OP_FLD: + if (po->flags & OPF_FSHIFT) + fprintf(fout, " f_st1 = f_st0;\n"); + if (po->operand[0].type == OPT_REG + && po->operand[0].reg == xST0) + { + strcat(g_comment, " fld st"); + break; + } + fprintf(fout, " f_st0 = %s;", + out_src_opr_float(buf1, sizeof(buf1), po, &po->operand[0])); + strcat(g_comment, " fld"); + break; + + case OP_FILD: + if (po->flags & OPF_FSHIFT) + fprintf(fout, " f_st1 = f_st0;\n"); + fprintf(fout, " f_st0 = (double)%s;", + out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], + lmod_cast(po, po->operand[0].lmod, 1), 0)); + strcat(g_comment, " fild"); + break; + + case OP_FLDc: + if (po->flags & OPF_FSHIFT) + fprintf(fout, " f_st1 = f_st0;\n"); + fprintf(fout, " f_st0 = "); + switch (po->operand[0].val) { + case X87_CONST_1: fprintf(fout, "1.0;"); break; + case X87_CONST_Z: fprintf(fout, "0.0;"); break; + default: ferr(po, "TODO\n"); break; + } + break; + + case OP_FST: + if ((po->flags & OPF_FPOP) && po->operand[0].type == OPT_REG + && po->operand[0].reg == xST0) + { + no_output = 1; + break; + } + fprintf(fout, " %s = f_st0;", + out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0])); + if (po->flags & OPF_FSHIFT) + fprintf(fout, "\n f_st0 = f_st1;"); + strcat(g_comment, " fst"); + break; + + case OP_FADD: + case OP_FDIV: + case OP_FMUL: + case OP_FSUB: + switch (po->op) { + case OP_FADD: j = '+'; break; + case OP_FDIV: j = '/'; break; + case OP_FMUL: j = '*'; break; + case OP_FSUB: j = '-'; break; + default: j = 'x'; break; + } + if (po->flags & OPF_FSHIFT) { + fprintf(fout, " f_st0 = f_st1 %c f_st0;", j); + } + else { + fprintf(fout, " %s %c= %s;", + out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0]), + j, + out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1])); + } + break; + + case OP_FDIVR: + case OP_FSUBR: + if (po->flags & OPF_FSHIFT) + snprintf(buf1, sizeof(buf1), "f_st0"); + else + out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0]); + fprintf(fout, " %s = %s %c %s;", buf1, + out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1]), + po->op == OP_FDIVR ? '/' : '-', + out_src_opr_float(buf3, sizeof(buf3), po, &po->operand[0])); + break; + + case OP_FIADD: + case OP_FIDIV: + case OP_FIMUL: + case OP_FISUB: + switch (po->op) { + case OP_FIADD: j = '+'; break; + case OP_FIDIV: j = '/'; break; + case OP_FIMUL: j = '*'; break; + case OP_FISUB: j = '-'; break; + default: j = 'x'; break; + } + fprintf(fout, " f_st0 %c= (double)%s;", j, + out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], + lmod_cast(po, po->operand[0].lmod, 1), 0)); + break; + + case OP_FIDIVR: + case OP_FISUBR: + fprintf(fout, " f_st0 = %s %c f_st0;", + out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1]), + po->op == OP_FIDIVR ? '/' : '-'); + break; + + case OPP_FTOL: + ferr_assert(po, po->flags & OPF_32BIT); + fprintf(fout, " eax = (s32)f_st0;"); + if (po->flags & OPF_FSHIFT) + fprintf(fout, "\n f_st0 = f_st1;"); + strcat(g_comment, " ftol"); + break; + // mmx case OP_EMMS: - strcpy(g_comment, "(emms)"); + strcpy(g_comment, " (emms)"); break; default: @@ -6924,7 +7379,78 @@ static char *next_word_s(char *w, size_t wsize, char *s) return s + i; } -static void scan_variables(FILE *fasm) +static int cmpstringp(const void *p1, const void *p2) +{ + return strcmp(*(char * const *)p1, *(char * const *)p2); +} + +static int is_xref_needed(char *p, char **rlist, int rlist_len) +{ + char *p2; + + p = sskip(p); + if (strstr(p, "...")) + // unable to determine, assume needed + return 1; + + if (*p == '.') // .text, .data, ... + // ref from other data or non-function -> no + return 0; + + p2 = strpbrk(p, "+:\r\n\x18"); + if (p2 != NULL) + *p2 = 0; + if (bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp)) + // referenced from removed code + return 0; + + return 1; +} + +static int xrefs_show_need(FILE *fasm, char *p, + char **rlist, int rlist_len) +{ + int found_need = 0; + char line[256]; + long pos; + + p = strrchr(p, ';'); + if (p != NULL && *p == ';' && IS_START(p + 2, "DATA XREF: ")) { + p += 13; + if (is_xref_needed(p, rlist, rlist_len)) + return 1; + } + + pos = ftell(fasm); + while (1) + { + if (!my_fgets(line, sizeof(line), fasm)) + break; + // non-first line is always indented + if (!my_isblank(line[0])) + break; + + // should be no content, just comment + p = sskip(line); + if (*p != ';') + break; + + p = strrchr(p, ';'); + p += 2; + // it's printed once, but no harm to check again + if (IS_START(p, "DATA XREF: ")) + p += 11; + + if (is_xref_needed(p, rlist, rlist_len)) { + found_need = 1; + break; + } + } + fseek(fasm, pos, SEEK_SET); + return found_need; +} + +static void scan_variables(FILE *fasm, char **rlist, int rlist_len) { struct scanned_var *var; char line[256] = { 0, }; @@ -6993,6 +7519,10 @@ static void scan_variables(FILE *fasm) break; } + // check refs comment(s) + if (!xrefs_show_need(fasm, p, rlist, rlist_len)) + continue; + if ((hg_var_cnt & 0xff) == 0) { hg_vars = realloc(hg_vars, sizeof(hg_vars[0]) * (hg_var_cnt + 0x100)); @@ -7091,11 +7621,6 @@ static int cmp_chunks(const void *p1, const void *p2) return strcmp(c1->name, c2->name); } -static int cmpstringp(const void *p1, const void *p2) -{ - return strcmp(*(char * const *)p1, *(char * const *)p2); -} - static void scan_ahead(FILE *fasm) { char words[2][256]; @@ -7293,7 +7818,7 @@ int main(int argc, char *argv[]) } if (g_header_mode) - scan_variables(fasm); + scan_variables(fasm, rlist, rlist_len); while (my_fgets(line, sizeof(line), fasm)) { @@ -7536,6 +8061,7 @@ do_pending_endp: pd->d = NULL; } g_func_pd_cnt = 0; + g_func_lmods = 0; pd = NULL; if (end) @@ -7680,11 +8206,8 @@ do_pending_endp: parse_op(&ops[pi], words, wordc); - if (sctproto != NULL) { - if (ops[pi].op == OP_CALL || ops[pi].op == OP_JMP) - ops[pi].datap = sctproto; - sctproto = NULL; - } + ops[pi].datap = sctproto; + sctproto = NULL; pi++; }