X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=tools%2Ftranslate.c;h=dd7ccb111682da0cd085f566cb82a4ac6a866535;hb=33c35af6a3f14ac142b0ec04f5275bff01a0b0fa;hp=cc3e4fd46d4d1082866709d8df388f0dfb51be17;hpb=c36e914d6c0dd787c146395192fa14a7a2bd4218;p=ia32rtools.git diff --git a/tools/translate.c b/tools/translate.c index cc3e4fd..dd7ccb1 100644 --- a/tools/translate.c +++ b/tools/translate.c @@ -1,3 +1,4 @@ +#define _GNU_SOURCE #include #include #include @@ -13,29 +14,56 @@ const char *asmfn; static int asmln; +#define anote(fmt, ...) \ + printf("%s:%d: note: " fmt, asmfn, asmln, ##__VA_ARGS__) #define awarn(fmt, ...) \ - printf("warning:%s:%d: " fmt, asmfn, asmln, ##__VA_ARGS__) + printf("%s:%d: warning: " fmt, asmfn, asmln, ##__VA_ARGS__) #define aerr(fmt, ...) do { \ - printf("error:%s:%d: " fmt, asmfn, asmln, ##__VA_ARGS__); \ + printf("%s:%d: error: " fmt, asmfn, asmln, ##__VA_ARGS__); \ + fcloseall(); \ exit(1); \ } while (0) -enum op_class { - OPC_UNSPEC, - OPC_RMD, /* removed or optimized out */ - OPC_DATA, /* data processing */ - OPC_DATA_FLAGS, /* data processing + sets flags */ - OPC_JMP, /* .. and call */ - OPC_JCC, +enum op_flags { + OPF_RMD = (1 << 0), /* removed or optimized out */ + OPF_DATA = (1 << 1), /* data processing - writes to dst opr */ + OPF_FLAGS = (1 << 2), /* sets flags */ + OPF_JMP = (1 << 3), /* branches, ret and call */ + OPF_CC = (1 << 4), /* uses flags */ + OPF_TAIL = (1 << 5), /* ret or tail call */ + OPF_REP = (1 << 6), /* prefixed by rep */ }; enum op_op { OP_INVAL, + OP_NOP, OP_PUSH, OP_POP, OP_MOV, + OP_LEA, + OP_MOVZX, + OP_MOVSX, + OP_NOT, + OP_CDQ, + OP_STOS, OP_RET, OP_ADD, + OP_SUB, + OP_AND, + OP_OR, + OP_XOR, + OP_SHL, + OP_SHR, + OP_SAR, + OP_ADC, + OP_SBB, + OP_INC, + OP_DEC, + OP_NEG, + OP_MUL, + OP_IMUL, + OP_DIV, + OP_IDIV, OP_TEST, OP_CMP, OP_CALL, @@ -59,53 +87,273 @@ enum op_op { }; enum opr_type { - OPT_UNSPEC, - OPT_REG, - OPT_REGMEM, - OPT_LABEL, - OPT_CONST, + OPT_UNSPEC, + OPT_REG, + OPT_REGMEM, + OPT_LABEL, + OPT_OFFSET, + OPT_CONST, }; enum opr_lenmod { - OPRM_UNSPEC, - OPRM_BYTE, - OPRM_WORD, - OPRM_DWORD, + OPLM_UNSPEC, + OPLM_BYTE, + OPLM_WORD, + OPLM_DWORD, }; -#define MAX_OPERANDS 2 +#define MAX_OPERANDS 3 struct parsed_opr { - enum opr_type type; - enum opr_lenmod lmod; - unsigned int val; - char name[256]; + enum opr_type type; + enum opr_lenmod lmod; + int reg; + unsigned int val; + char name[256]; }; struct parsed_op { - enum op_class cls; - enum op_op op; - struct parsed_opr operand[MAX_OPERANDS]; - int operand_cnt; + enum op_op op; + struct parsed_opr operand[MAX_OPERANDS]; + unsigned int flags; + int operand_cnt; + int regmask_src; // all referensed regs + int regmask_dst; + int pfomask; // flagop: parsed_flag_op that can't be delayed + int argmask; // push: args that are altered before call + int cc_scratch; // scratch storage during analysis + int bt_i; // branch target (for branches) + struct parsed_op *lrl; // label reference list entry + void *datap; +}; + +// datap: +// OP_CALL - ptr to parsed_proto +// (OPF_CC) - point to corresponding (OPF_FLAGS) + +struct parsed_equ { + char name[64]; + enum opr_lenmod lmod; + int offset; }; #define MAX_OPS 1024 static struct parsed_op ops[MAX_OPS]; -static char labels[MAX_OPS][32]; +static struct parsed_equ *g_eqs; +static int g_eqcnt; +static char g_labels[MAX_OPS][32]; +static struct parsed_op *g_label_refs[MAX_OPS]; +static struct parsed_proto g_func_pp; +static char g_func[256]; +static char g_comment[256]; +static int g_bp_frame; +static int g_bp_stack; +#define ferr(op_, fmt, ...) do { \ + printf("error:%s:#%ld: '%s': " fmt, g_func, (op_) - ops, \ + dump_op(op_), ##__VA_ARGS__); \ + fcloseall(); \ + exit(1); \ +} while (0) + +#define MAX_REGS 8 + +const char *regs_r32[] = { "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp" }; +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 }; + +// possible basic comparison types (without inversion) +enum parsed_flag_op { + PFO_O, // 0 OF=1 + PFO_C, // 2 CF=1 + PFO_Z, // 4 ZF=1 + PFO_BE, // 6 CF=1||ZF=1 + PFO_S, // 8 SF=1 + PFO_P, // a PF=1 + PFO_L, // c SF!=OF + PFO_LE, // e ZF=1||SF!=OF +}; + +static const char *parsed_flag_op_names[] = { + "o", "c", "z", "be", "s", "p", "l", "le" +}; + +static int char_array_i(const char *array[], size_t len, const char *s) +{ + int i; + + for (i = 0; i < len; i++) + if (IS(s, array[i])) + return i; + + return -1; +} + +static void printf_number(char *buf, size_t buf_size, long number) +{ + // output in C-friendly form + snprintf(buf, buf_size, number < 10 ? "%lu" : "0x%02lx", number); +} + +static int parse_reg(enum opr_lenmod *reg_lmod, const char *s) +{ + int reg; -const char *main_regs[] = { "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp" }; + reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s); + if (reg >= 0) { + *reg_lmod = OPLM_DWORD; + return reg; + } + reg = char_array_i(regs_r16, ARRAY_SIZE(regs_r16), s); + if (reg >= 0) { + *reg_lmod = OPLM_WORD; + return reg; + } + reg = char_array_i(regs_r8h, ARRAY_SIZE(regs_r8h), s); + if (reg >= 0) { + *reg_lmod = OPLM_BYTE; + return reg; + } + reg = char_array_i(regs_r8l, ARRAY_SIZE(regs_r8l), s); + if (reg >= 0) { + *reg_lmod = OPLM_BYTE; + return reg; + } + + return -1; +} + +static long parse_number(const char *number) +{ + int len = strlen(number); + const char *p = number; + char *endp = NULL; + int neg = 0; + int bad; + long ret; + + if (*p == '-') { + neg = 1; + p++; + } + if (len > 1 && *p == '0') + p++; + if (number[len - 1] == 'h') { + ret = strtol(p, &endp, 16); + bad = (*endp != 'h'); + } + else { + ret = strtol(p, &endp, 10); + bad = (*endp != 0); + } + if (bad) + aerr("number parsing failed\n"); + if (neg) + ret = -ret; + return ret; +} + +static int parse_indmode(char *name, int *regmask, int need_c_cvt) +{ + enum opr_lenmod lmod; + char cvtbuf[256]; + char *d = cvtbuf; + char *s = name; + char w[64]; + long number; + int reg; + int c = 0; + + *d = 0; + + while (*s != 0) { + d += strlen(d); + while (my_isblank(*s)) + s++; + for (; my_issep(*s); d++, s++) + *d = *s; + while (my_isblank(*s)) + s++; + *d = 0; + + // skip 'ds:' prefix + if (!strncmp(s, "ds:", 3)) + s += 3; + + s = next_idt(w, sizeof(w), s); + if (w[0] == 0) + break; + c++; + + reg = parse_reg(&lmod, w); + if (reg >= 0) { + *regmask |= 1 << reg; + goto pass; + } + + if ('0' <= w[0] && w[0] <= '9') { + number = parse_number(w); + printf_number(d, sizeof(cvtbuf) - (d - cvtbuf), number); + continue; + } + + // probably some label/identifier - pass + +pass: + snprintf(d, sizeof(cvtbuf) - (d - cvtbuf), "%s", w); + } + + if (need_c_cvt) + strcpy(name, cvtbuf); + + return c; +} + +static int guess_lmod_from_name(struct parsed_opr *opr) +{ + if (!strncmp(opr->name, "dword_", 6)) { + opr->lmod = OPLM_DWORD; + return 1; + } + if (!strncmp(opr->name, "word_", 5)) { + opr->lmod = OPLM_WORD; + return 1; + } + if (!strncmp(opr->name, "byte_", 5)) { + opr->lmod = OPLM_BYTE; + return 1; + } + return 0; +} + +static void setup_reg_opr(struct parsed_opr *opr, int reg, enum opr_lenmod lmod, + int *regmask) +{ + opr->type = OPT_REG; + opr->reg = reg; + opr->lmod = lmod; + *regmask |= 1 << reg; +} + +static struct parsed_equ *equ_find(struct parsed_op *po, const char *name); static int parse_operand(struct parsed_opr *opr, - char words[16][256], int wordc, int w, enum op_class cls) + int *regmask, int *regmask_indirect, + char words[16][256], int wordc, int w, unsigned int op_flags) { - char *endp = NULL; - int ret, len; - int i; + enum opr_lenmod tmplmod; + int ret, len; + long number; + int i; if (w >= wordc) aerr("parse_operand w %d, wordc %d\n", w, wordc); + opr->reg = xUNSPEC; + for (i = w; i < wordc; i++) { len = strlen(words[i]); if (words[i][len - 1] == ',') { @@ -115,7 +363,7 @@ static int parse_operand(struct parsed_opr *opr, } } - if (cls == OPC_JMP || cls == OPC_JCC) { + if (op_flags & OPF_JMP) { const char *label; if (wordc - w == 3 && IS(words[w + 1], "ptr")) @@ -135,11 +383,11 @@ static int parse_operand(struct parsed_opr *opr, if (wordc - w >= 3) { if (IS(words[w + 1], "ptr")) { if (IS(words[w], "dword")) - opr->lmod = OPRM_DWORD; + opr->lmod = OPLM_DWORD; else if (IS(words[w], "word")) - opr->lmod = OPRM_WORD; + opr->lmod = OPLM_WORD; else if (IS(words[w], "byte")) - opr->lmod = OPRM_BYTE; + opr->lmod = OPLM_BYTE; else aerr("type parsing failed\n"); w += 2; @@ -147,270 +395,1891 @@ static int parse_operand(struct parsed_opr *opr, } if (wordc - w == 2 && IS(words[w], "offset")) { - opr->type = OPT_LABEL; + opr->type = OPT_OFFSET; strcpy(opr->name, words[w + 1]); return wordc; } - if (wordc - w != 1) - aerr("parse_operand 1 word expected\n"); + if (wordc - w != 1) + aerr("parse_operand 1 word expected\n"); - len = strlen(words[w]); + strcpy(opr->name, words[w]); - if (words[w][0] == '[') { - opr->type = OPT_REGMEM; - ret = sscanf(words[w], "[%256s]", opr->name); - if (ret != 1) - aerr("[] parse failure\n"); - return wordc; - } - else if (('0' <= words[w][0] && words[w][0] <= '9') - || words[w][0] == '-') - { - opr->type = OPT_CONST; - i = 0; - if (len > 1 && words[w][0] == '0') - i = 1; - if (words[w][len - 1] == 'h') { - words[w][len - 1] = 0; - opr->val = strtoul(&words[w][i], &endp, 16); - } - else { - opr->val = strtoul(&words[w][i], &endp, 10); - } - if (*endp != 0) - aerr("const parse failed\n"); - return wordc; - } + if (words[w][0] == '[') { + opr->type = OPT_REGMEM; + ret = sscanf(words[w], "[%[^]]]", opr->name); + if (ret != 1) + aerr("[] parse failure\n"); + + parse_indmode(opr->name, regmask_indirect, 1); + if (opr->lmod == OPLM_UNSPEC && !strncmp(opr->name, "ebp+", 4)) { + // might be an equ + struct parsed_equ *eq = equ_find(NULL, opr->name + 4); + if (eq) + opr->lmod = eq->lmod; + } + return wordc; + } + else if (strchr(words[w], '[')) { + // label[reg] form + opr->type = OPT_REGMEM; + if (opr->lmod == OPLM_UNSPEC) + guess_lmod_from_name(opr); + parse_indmode(strchr(words[w], '['), regmask_indirect, 0); + return wordc; + } + else if (('0' <= words[w][0] && words[w][0] <= '9') + || words[w][0] == '-') + { + number = parse_number(words[w]); + opr->type = OPT_CONST; + opr->val = number; + printf_number(opr->name, sizeof(opr->name), number); + return wordc; + } - strcpy(opr->name, words[w]); - opr->type = OPT_REG; - return wordc; + ret = parse_reg(&tmplmod, opr->name); + if (ret >= 0) { + setup_reg_opr(opr, ret, tmplmod, regmask); + return wordc; + } + + // most likely var in data segment + opr->type = OPT_LABEL; + if (opr->lmod == OPLM_UNSPEC) + guess_lmod_from_name(opr); + if (opr->lmod != OPLM_UNSPEC) + return wordc; + + // TODO: scan data seg to determine type? + return wordc; } static const struct { - const char *name; - enum op_op op; - enum op_class cls; - int minopr; - int maxopr; + const char *name; + unsigned int flags; +} pref_table[] = { + { "rep", OPF_REP }, +}; + +static const struct { + const char *name; + enum op_op op; + unsigned int minopr; + unsigned int maxopr; + unsigned int flags; } op_table[] = { - { "push", OP_PUSH, OPC_DATA, 1, 1 }, - { "pop", OP_POP, OPC_DATA, 1, 1 }, - { "mov" , OP_MOV, OPC_DATA, 2, 2 }, - { "add", OP_ADD, OPC_DATA_FLAGS, 2, 2 }, - { "test", OP_TEST, OPC_DATA_FLAGS, 2, 2 }, - { "cmp", OP_CMP, OPC_DATA_FLAGS, 2, 2 }, - { "retn", OP_RET, OPC_JMP, 0, 1 }, - { "call", OP_CALL, OPC_JMP, 1, 1 }, - { "jmp", OP_JMP, OPC_JMP, 1, 1 }, - { "jo", OP_JO, OPC_JCC, 1, 1 }, // 70 OF=1 - { "jno", OP_JNO, OPC_JCC, 1, 1 }, // 71 OF=0 - { "jc", OP_JC, OPC_JCC, 1, 1 }, // 72 CF=1 - { "jb", OP_JC, OPC_JCC, 1, 1 }, // 72 - { "jnc", OP_JNC, OPC_JCC, 1, 1 }, // 73 CF=0 - { "jae", OP_JNC, OPC_JCC, 1, 1 }, // 73 - { "jz", OP_JZ, OPC_JCC, 1, 1 }, // 74 ZF=1 - { "je", OP_JZ, OPC_JCC, 1, 1 }, // 74 - { "jnz", OP_JNZ, OPC_JCC, 1, 1 }, // 75 ZF=0 - { "jne", OP_JNZ, OPC_JCC, 1, 1 }, // 75 - { "jbe", OP_JBE, OPC_JCC, 1, 1 }, // 76 CF=1 || ZF=1 - { "jna", OP_JBE, OPC_JCC, 1, 1 }, // 76 - { "ja", OP_JA, OPC_JCC, 1, 1 }, // 77 CF=0 && ZF=0 - { "jnbe", OP_JA, OPC_JCC, 1, 1 }, // 77 - { "js", OP_JS, OPC_JCC, 1, 1 }, // 78 SF=1 - { "jns", OP_JNS, OPC_JCC, 1, 1 }, // 79 SF=0 - { "jp", OP_JP, OPC_JCC, 1, 1 }, // 7a PF=1 - { "jpe", OP_JP, OPC_JCC, 1, 1 }, // 7a - { "jnp", OP_JNP, OPC_JCC, 1, 1 }, // 7b PF=0 - { "jpo", OP_JNP, OPC_JCC, 1, 1 }, // 7b - { "jl", OP_JL, OPC_JCC, 1, 1 }, // 7c SF!=OF - { "jnge", OP_JL, OPC_JCC, 1, 1 }, // 7c - { "jge", OP_JGE, OPC_JCC, 1, 1 }, // 7d SF=OF - { "jnl", OP_JGE, OPC_JCC, 1, 1 }, // 7d - { "jle", OP_JLE, OPC_JCC, 1, 1 }, // 7e ZF=1 || SF!=OF - { "jng", OP_JLE, OPC_JCC, 1, 1 }, // 7e - { "jg", OP_JG, OPC_JCC, 1, 1 }, // 7f ZF=0 && SF=OF - { "jnle", OP_JG, OPC_JCC, 1, 1 }, // 7f + { "nop", OP_NOP, 0, 0, 0 }, + { "push", OP_PUSH, 1, 1, 0 }, + { "pop", OP_POP, 1, 1, OPF_DATA }, + { "mov" , OP_MOV, 2, 2, OPF_DATA }, + { "lea", OP_LEA, 2, 2, OPF_DATA }, + { "movzx",OP_MOVZX, 2, 2, OPF_DATA }, + { "movsx",OP_MOVSX, 2, 2, OPF_DATA }, + { "not", OP_NOT, 1, 1, OPF_DATA }, + { "cdq", OP_CDQ, 0, 0, OPF_DATA }, + { "stosb",OP_STOS, 0, 0, OPF_DATA }, + { "stosw",OP_STOS, 0, 0, OPF_DATA }, + { "stosd",OP_STOS, 0, 0, OPF_DATA }, + { "add", OP_ADD, 2, 2, OPF_DATA|OPF_FLAGS }, + { "sub", OP_SUB, 2, 2, OPF_DATA|OPF_FLAGS }, + { "and", OP_AND, 2, 2, OPF_DATA|OPF_FLAGS }, + { "or", OP_OR, 2, 2, OPF_DATA|OPF_FLAGS }, + { "xor", OP_XOR, 2, 2, OPF_DATA|OPF_FLAGS }, + { "shl", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, + { "shr", OP_SHR, 2, 2, OPF_DATA|OPF_FLAGS }, + { "sal", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS }, + { "sar", OP_SAR, 2, 2, OPF_DATA|OPF_FLAGS }, + { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC }, + { "sbb", OP_SBB, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC }, + { "inc", OP_INC, 1, 1, OPF_DATA|OPF_FLAGS }, + { "dec", OP_DEC, 1, 1, OPF_DATA|OPF_FLAGS }, + { "neg", OP_NEG, 1, 1, OPF_DATA|OPF_FLAGS }, + { "mul", OP_MUL, 1, 1, OPF_DATA|OPF_FLAGS }, + { "imul", OP_IMUL, 1, 3, OPF_DATA|OPF_FLAGS }, + { "div", OP_DIV, 1, 1, OPF_DATA|OPF_FLAGS }, + { "idiv", OP_IDIV, 1, 1, OPF_DATA|OPF_FLAGS }, + { "test", OP_TEST, 2, 2, OPF_FLAGS }, + { "cmp", OP_CMP, 2, 2, OPF_FLAGS }, + { "retn", OP_RET, 0, 1, OPF_JMP|OPF_TAIL }, + { "call", OP_CALL, 1, 1, OPF_JMP|OPF_FLAGS }, + { "jmp", OP_JMP, 1, 1, OPF_JMP }, + { "jo", OP_JO, 1, 1, OPF_JMP|OPF_CC }, // 70 OF=1 + { "jno", OP_JNO, 1, 1, OPF_JMP|OPF_CC }, // 71 OF=0 + { "jc", OP_JC, 1, 1, OPF_JMP|OPF_CC }, // 72 CF=1 + { "jb", OP_JC, 1, 1, OPF_JMP|OPF_CC }, // 72 + { "jnc", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73 CF=0 + { "jnb", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73 + { "jae", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73 + { "jz", OP_JZ, 1, 1, OPF_JMP|OPF_CC }, // 74 ZF=1 + { "je", OP_JZ, 1, 1, OPF_JMP|OPF_CC }, // 74 + { "jnz", OP_JNZ, 1, 1, OPF_JMP|OPF_CC }, // 75 ZF=0 + { "jne", OP_JNZ, 1, 1, OPF_JMP|OPF_CC }, // 75 + { "jbe", OP_JBE, 1, 1, OPF_JMP|OPF_CC }, // 76 CF=1 || ZF=1 + { "jna", OP_JBE, 1, 1, OPF_JMP|OPF_CC }, // 76 + { "ja", OP_JA, 1, 1, OPF_JMP|OPF_CC }, // 77 CF=0 && ZF=0 + { "jnbe", OP_JA, 1, 1, OPF_JMP|OPF_CC }, // 77 + { "js", OP_JS, 1, 1, OPF_JMP|OPF_CC }, // 78 SF=1 + { "jns", OP_JNS, 1, 1, OPF_JMP|OPF_CC }, // 79 SF=0 + { "jp", OP_JP, 1, 1, OPF_JMP|OPF_CC }, // 7a PF=1 + { "jpe", OP_JP, 1, 1, OPF_JMP|OPF_CC }, // 7a + { "jnp", OP_JNP, 1, 1, OPF_JMP|OPF_CC }, // 7b PF=0 + { "jpo", OP_JNP, 1, 1, OPF_JMP|OPF_CC }, // 7b + { "jl", OP_JL, 1, 1, OPF_JMP|OPF_CC }, // 7c SF!=OF + { "jnge", OP_JL, 1, 1, OPF_JMP|OPF_CC }, // 7c + { "jge", OP_JGE, 1, 1, OPF_JMP|OPF_CC }, // 7d SF=OF + { "jnl", OP_JGE, 1, 1, OPF_JMP|OPF_CC }, // 7d + { "jle", OP_JLE, 1, 1, OPF_JMP|OPF_CC }, // 7e ZF=1 || SF!=OF + { "jng", OP_JLE, 1, 1, OPF_JMP|OPF_CC }, // 7e + { "jg", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f ZF=0 && SF=OF + { "jnle", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f + { "seto", OP_JO, 1, 1, OPF_DATA|OPF_CC }, + { "setno", OP_JNO, 1, 1, OPF_DATA|OPF_CC }, + { "setc", OP_JC, 1, 1, OPF_DATA|OPF_CC }, + { "setb", OP_JC, 1, 1, OPF_DATA|OPF_CC }, + { "setnc", OP_JNC, 1, 1, OPF_DATA|OPF_CC }, + { "setae", OP_JNC, 1, 1, OPF_DATA|OPF_CC }, + { "setz", OP_JZ, 1, 1, OPF_DATA|OPF_CC }, + { "sete", OP_JZ, 1, 1, OPF_DATA|OPF_CC }, + { "setnz", OP_JNZ, 1, 1, OPF_DATA|OPF_CC }, + { "setne", OP_JNZ, 1, 1, OPF_DATA|OPF_CC }, + { "setbe", OP_JBE, 1, 1, OPF_DATA|OPF_CC }, + { "setna", OP_JBE, 1, 1, OPF_DATA|OPF_CC }, + { "seta", OP_JA, 1, 1, OPF_DATA|OPF_CC }, + { "setnbe", OP_JA, 1, 1, OPF_DATA|OPF_CC }, + { "sets", OP_JS, 1, 1, OPF_DATA|OPF_CC }, + { "setns", OP_JNS, 1, 1, OPF_DATA|OPF_CC }, + { "setp", OP_JP, 1, 1, OPF_DATA|OPF_CC }, + { "setpe", OP_JP, 1, 1, OPF_DATA|OPF_CC }, + { "setnp", OP_JNP, 1, 1, OPF_DATA|OPF_CC }, + { "setpo", OP_JNP, 1, 1, OPF_DATA|OPF_CC }, + { "setl", OP_JL, 1, 1, OPF_DATA|OPF_CC }, + { "setnge", OP_JL, 1, 1, OPF_DATA|OPF_CC }, + { "setge", OP_JGE, 1, 1, OPF_DATA|OPF_CC }, + { "setnl", OP_JGE, 1, 1, OPF_DATA|OPF_CC }, + { "setle", OP_JLE, 1, 1, OPF_DATA|OPF_CC }, + { "setng", OP_JLE, 1, 1, OPF_DATA|OPF_CC }, + { "setg", OP_JG, 1, 1, OPF_DATA|OPF_CC }, + { "setnle", OP_JG, 1, 1, OPF_DATA|OPF_CC }, }; static void parse_op(struct parsed_op *op, char words[16][256], int wordc) { - int w = 1; - int opr; - int i; + enum opr_lenmod lmod; + int prefix_flags = 0; + int regmask_ind; + int regmask; + int op_w = 0; + int opr = 0; + int w = 0; + int i; - for (i = 0; i < ARRAY_SIZE(op_table); i++) { - if (!IS(words[0], op_table[i].name)) - continue; + for (i = 0; i < ARRAY_SIZE(pref_table); i++) { + if (IS(words[w], pref_table[i].name)) { + prefix_flags = pref_table[i].flags; + break; + } + } - for (opr = 0; opr < op_table[i].minopr; opr++) { - w = parse_operand(&op->operand[opr], - words, wordc, w, op_table[i].cls); - } + if (prefix_flags) { + if (wordc <= 1) + aerr("lone prefix: '%s'\n", words[0]); + w++; + } - for (; w < wordc && opr < op_table[i].maxopr; opr++) { - w = parse_operand(&op->operand[opr], - words, wordc, w, op_table[i].cls); - } + op_w = w; + for (i = 0; i < ARRAY_SIZE(op_table); i++) { + if (IS(words[w], op_table[i].name)) + break; + } - goto done; - } + if (i == ARRAY_SIZE(op_table)) + aerr("unhandled op: '%s'\n", words[0]); + w++; + + op->op = op_table[i].op; + op->flags = op_table[i].flags | prefix_flags; + op->regmask_src = op->regmask_dst = 0; + + for (opr = 0; opr < op_table[i].minopr; opr++) { + regmask = regmask_ind = 0; + w = parse_operand(&op->operand[opr], ®mask, ®mask_ind, + words, wordc, w, op->flags); + + if (opr == 0 && (op->flags & OPF_DATA)) + op->regmask_dst = regmask; + // for now, mark dst as src too + op->regmask_src |= regmask | regmask_ind; + } + + for (; w < wordc && opr < op_table[i].maxopr; opr++) { + w = parse_operand(&op->operand[opr], + &op->regmask_src, &op->regmask_src, + words, wordc, w, op->flags); + } + + if (w < wordc) + aerr("parse_op %s incomplete: %d/%d\n", + words[0], w, wordc); + + // special cases + op->operand_cnt = opr; + if (!strncmp(op_table[i].name, "set", 3)) + op->operand[0].lmod = OPLM_BYTE; + + // ops with implicit argumets + switch (op->op) { + case OP_CDQ: + op->operand_cnt = 2; + setup_reg_opr(&op->operand[0], xDX, OPLM_DWORD, &op->regmask_dst); + setup_reg_opr(&op->operand[1], xAX, OPLM_DWORD, &op->regmask_src); + break; - aerr("unhandled op: '%s'\n", words[0]); + case OP_STOS: + if (op->operand_cnt != 0) + break; + if (IS(words[op_w], "stosb")) + lmod = OPLM_BYTE; + else if (IS(words[op_w], "stosw")) + lmod = OPLM_WORD; + else if (IS(words[op_w], "stosd")) + lmod = OPLM_DWORD; + op->operand_cnt = 3; + setup_reg_opr(&op->operand[0], xDI, lmod, &op->regmask_dst); + setup_reg_opr(&op->operand[1], xCX, OPLM_DWORD, &op->regmask_dst); + setup_reg_opr(&op->operand[2], xAX, OPLM_DWORD, &op->regmask_src); + break; -done: - if (w < wordc) - aerr("parse_op %s incomplete: %d/%d\n", - words[0], w, wordc); + case OP_IMUL: + if (op->operand_cnt != 1) + break; + // fallthrough + case OP_MUL: + // singleop mul + op->regmask_dst = (1 << xDX) | (1 << xAX); + op->regmask_src |= (1 << xAX); + if (op->operand[0].lmod == OPLM_UNSPEC) + op->operand[0].lmod = OPLM_DWORD; + break; - op->cls = op_table[i].cls; - op->op = op_table[i].op; - return; + case OP_DIV: + case OP_IDIV: + // we could set up operands for edx:eax, but there is no real need to + // (see is_opr_modified()) + regmask = (1 << xDX) | (1 << xAX); + op->regmask_dst = regmask; + op->regmask_src |= regmask; + if (op->operand[0].lmod == OPLM_UNSPEC) + op->operand[0].lmod = OPLM_DWORD; + break; + + case OP_SHL: + case OP_SHR: + case OP_SAR: + if (op->operand[1].lmod == OPLM_UNSPEC) + op->operand[1].lmod = OPLM_BYTE; + break; + + default: + break; + } } -int gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) +static const char *op_name(enum op_op op) { - struct parsed_proto pp; - int ret; - int i; + int i; - ret = proto_parse(fhdr, funcn, &pp); - if (ret) - return ret; + for (i = 0; i < ARRAY_SIZE(op_table); i++) + if (op_table[i].op == op) + return op_table[i].name; - fprintf(fout, "%s %s(", pp.ret_type, funcn); - for (i = 0; i < pp.argc; i++) { - if (i > 0) - fprintf(fout, ", "); - fprintf(fout, "%s a%d", pp.arg[i].type, i); - } - fprintf(fout, ")\n{\n"); + return "???"; +} + +// debug +static const char *dump_op(struct parsed_op *po) +{ + static char out[128]; + char *p = out; + int i; + + snprintf(out, sizeof(out), "%s", op_name(po->op)); + for (i = 0; i < po->operand_cnt; i++) { + p += strlen(p); + if (i > 0) + *p++ = ','; + snprintf(p, sizeof(out) - (p - out), + po->operand[i].type == OPT_REGMEM ? " [%s]" : " %s", + po->operand[i].name); + } + + return out; +} + +static const char *opr_name(struct parsed_op *po, int opr_num) +{ + if (opr_num >= po->operand_cnt) + ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); + return po->operand[opr_num].name; +} + +static unsigned int opr_const(struct parsed_op *po, int opr_num) +{ + if (opr_num >= po->operand_cnt) + ferr(po, "opr OOR: %d/%d\n", opr_num, po->operand_cnt); + if (po->operand[opr_num].type != OPT_CONST) + ferr(po, "opr %d: const expected\n", opr_num); + return po->operand[opr_num].val; +} + +static const char *opr_reg_p(struct parsed_op *po, struct parsed_opr *popr) +{ + if ((unsigned int)popr->reg >= MAX_REGS) + ferr(po, "invalid reg: %d\n", popr->reg); + return regs_r32[popr->reg]; +} + +static struct parsed_equ *equ_find(struct parsed_op *po, const char *name) +{ + int i; + + for (i = 0; i < g_eqcnt; i++) + if (IS(g_eqs[i].name, name)) + break; + if (i >= g_eqcnt) { + if (po != NULL) + ferr(po, "unresolved equ name: '%s'\n", name); + return NULL; + } + + return &g_eqs[i]; +} + +static void bg_frame_access(struct parsed_op *po, enum opr_lenmod lmod, + char *buf, size_t buf_size, const char *bp_arg, + int is_src, int is_lea) +{ + const char *prefix = ""; + struct parsed_equ *eq; + int i, arg_i, arg_s; + int sf_ofs; + + snprintf(g_comment, sizeof(g_comment), "%s", bp_arg); + + eq = equ_find(po, bp_arg); + + if (eq->offset >= 0) { + arg_i = eq->offset / 4 - 2; + if (arg_i < 0 || arg_i >= g_func_pp.argc_stack) + ferr(po, "offset %d doesn't map to any arg\n", eq->offset); + + for (i = arg_s = 0; i < g_func_pp.argc; i++) { + if (g_func_pp.arg[i].reg != NULL) + continue; + if (arg_s == arg_i) + break; + arg_s++; + } + if (i == g_func_pp.argc) + ferr(po, "arg %d not in prototype?\n", arg_i); + if (is_lea) + ferr(po, "lea to arg?\n"); + + snprintf(buf, buf_size, "%sa%d", is_src ? "(u32)" : "", i + 1); + } + else { + if (g_bp_stack == 0) + ferr(po, "bp_stack access after it was not detected\n"); + + sf_ofs = g_bp_stack + eq->offset; + if (sf_ofs < 0) + ferr(po, "bp_stack offset %d/%d\n", eq->offset, g_bp_stack); + + if (is_lea) + prefix = "(u32)&"; + + switch (lmod) + { + case OPLM_BYTE: + snprintf(buf, buf_size, "%ssf.b[%d]", prefix, sf_ofs); + break; + case OPLM_WORD: + snprintf(buf, buf_size, "%ssf.w[%d]", prefix, sf_ofs / 2); + break; + case OPLM_DWORD: + snprintf(buf, buf_size, "%ssf.d[%d]", prefix, sf_ofs / 4); + break; + default: + ferr(po, "bp_stack bad lmod: %d\n", lmod); + } + } +} + +static char *out_src_opr(char *buf, size_t buf_size, + struct parsed_op *po, struct parsed_opr *popr, int is_lea) +{ + const char *cast = ""; + char tmp1[256], tmp2[256]; + char expr[256]; + int ret; + + switch (popr->type) { + case OPT_REG: + if (is_lea) + ferr(po, "lea from reg?\n"); + + switch (popr->lmod) { + case OPLM_DWORD: + snprintf(buf, buf_size, "%s", opr_reg_p(po, popr)); + break; + case OPLM_WORD: + snprintf(buf, buf_size, "(u16)%s", opr_reg_p(po, popr)); + break; + case OPLM_BYTE: + if (popr->name[1] == 'h') // XXX.. + snprintf(buf, buf_size, "(u8)(%s >> 8)", opr_reg_p(po, popr)); + else + snprintf(buf, buf_size, "(u8)%s", opr_reg_p(po, popr)); + break; + default: + ferr(po, "invalid src lmod: %d\n", popr->lmod); + } + break; + + case OPT_REGMEM: + if (g_bp_frame && !strncmp(popr->name, "ebp+", 4)) { + bg_frame_access(po, popr->lmod, buf, buf_size, + popr->name + 4, 1, is_lea); + break; + } + + strcpy(expr, popr->name); + if (strchr(expr, '[')) { + // special case: '[' can only be left for label[reg] form + ret = sscanf(expr, "%[^[][%[^]]]", tmp1, tmp2); + if (ret != 2) + ferr(po, "parse failure for '%s'\n", expr); + snprintf(expr, sizeof(expr), "(u32)&%s + %s", tmp1, tmp2); + } + + // XXX: do we need more parsing? + if (is_lea) { + snprintf(buf, buf_size, "%s", expr); + break; + } + + switch (popr->lmod) { + case OPLM_DWORD: + cast = "*(u32 *)"; + break; + case OPLM_WORD: + cast = "*(u16 *)"; + break; + case OPLM_BYTE: + cast = "*(u8 *)"; + break; + default: + ferr(po, "invalid lmod: %d\n", popr->lmod); + } + snprintf(buf, buf_size, "%s(%s)", cast, expr); + break; + + case OPT_LABEL: + if (is_lea) + snprintf(buf, buf_size, "(u32)&%s", popr->name); + else + snprintf(buf, buf_size, "(u32)%s", popr->name); + break; + + case OPT_OFFSET: + if (is_lea) + ferr(po, "lea an offset?\n"); + snprintf(buf, buf_size, "(u32)&%s", popr->name); + break; + + case OPT_CONST: + if (is_lea) + ferr(po, "lea from const?\n"); + + printf_number(buf, buf_size, popr->val); + break; + + default: + ferr(po, "invalid src type: %d\n", popr->type); + } + + return buf; +} + +static char *out_dst_opr(char *buf, size_t buf_size, + struct parsed_op *po, struct parsed_opr *popr) +{ + switch (popr->type) { + case OPT_REG: + switch (popr->lmod) { + case OPLM_DWORD: + snprintf(buf, buf_size, "%s", opr_reg_p(po, popr)); + break; + case OPLM_WORD: + // ugh.. + snprintf(buf, buf_size, "LOWORD(%s)", opr_reg_p(po, popr)); + break; + case OPLM_BYTE: + // ugh.. + if (popr->name[1] == 'h') // XXX.. + snprintf(buf, buf_size, "BYTE1(%s)", opr_reg_p(po, popr)); + else + snprintf(buf, buf_size, "LOBYTE(%s)", opr_reg_p(po, popr)); + break; + default: + ferr(po, "invalid dst lmod: %d\n", popr->lmod); + } + break; + + case OPT_REGMEM: + if (g_bp_frame && !strncmp(popr->name, "ebp+", 4)) { + bg_frame_access(po, popr->lmod, buf, buf_size, + popr->name + 4, 0, 0); + break; + } + + return out_src_opr(buf, buf_size, po, popr, 0); + + default: + ferr(po, "invalid dst type: %d\n", popr->type); + } + + return buf; +} + +static const char *lmod_cast_u(struct parsed_op *po, + enum opr_lenmod lmod) +{ + switch (lmod) { + case OPLM_DWORD: + return ""; + case OPLM_WORD: + return "(u16)"; + case OPLM_BYTE: + return "(u8)"; + default: + ferr(po, "invalid lmod: %d\n", lmod); + return "(_invalid_)"; + } +} + +static const char *lmod_cast_s(struct parsed_op *po, + enum opr_lenmod lmod) +{ + switch (lmod) { + case OPLM_DWORD: + return "(s32)"; + case OPLM_WORD: + return "(s16)"; + case OPLM_BYTE: + return "(s8)"; + default: + ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); + return "(_invalid_)"; + } +} + +static const char *lmod_cast(struct parsed_op *po, + enum opr_lenmod lmod, int is_signed) +{ + return is_signed ? + lmod_cast_s(po, lmod) : + lmod_cast_u(po, lmod); +} + +static int lmod_bytes(struct parsed_op *po, enum opr_lenmod lmod) +{ + switch (lmod) { + case OPLM_DWORD: + return 4; + case OPLM_WORD: + return 2; + case OPLM_BYTE: + return 1; + default: + ferr(po, "%s: invalid lmod: %d\n", __func__, lmod); + return 0; + } +} + +static enum parsed_flag_op split_cond(struct parsed_op *po, + enum op_op op, int *is_inv) +{ + *is_inv = 0; + + switch (op) { + case OP_JO: + return PFO_O; + case OP_JC: + return PFO_C; + case OP_JZ: + return PFO_Z; + case OP_JBE: + return PFO_BE; + case OP_JS: + return PFO_S; + case OP_JP: + return PFO_P; + case OP_JL: + return PFO_L; + case OP_JLE: + return PFO_LE; + + case OP_JNO: + *is_inv = 1; + return PFO_O; + case OP_JNC: + *is_inv = 1; + return PFO_C; + case OP_JNZ: + *is_inv = 1; + return PFO_Z; + case OP_JA: + *is_inv = 1; + return PFO_BE; + case OP_JNS: + *is_inv = 1; + return PFO_S; + case OP_JNP: + *is_inv = 1; + return PFO_P; + case OP_JGE: + *is_inv = 1; + return PFO_L; + case OP_JG: + *is_inv = 1; + return PFO_LE; + + case OP_ADC: + case OP_SBB: + return PFO_C; + + default: + ferr(po, "split_cond: bad op %d\n", op); + return -1; + } +} + +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) +{ + const char *cast, *scast; + + cast = lmod_cast_u(po, lmod); + scast = lmod_cast_s(po, lmod); + + switch (pfo) { + case PFO_Z: + case PFO_BE: // CF=1||ZF=1; CF=0 + snprintf(buf, buf_size, "(%s%s %s 0)", + cast, expr, is_inv ? "!=" : "=="); + break; + + case PFO_S: + case PFO_L: // SF!=OF; OF=0 + snprintf(buf, buf_size, "(%s%s %s 0)", + scast, expr, is_inv ? ">=" : "<"); + break; + + case PFO_LE: // ZF=1||SF!=OF; OF=0 + snprintf(buf, buf_size, "(%s%s %s 0)", + scast, expr, is_inv ? ">" : "<="); + break; + + default: + ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); + } +} + +static void out_cmp_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 *expr1, const char *expr2) +{ + const char *cast, *scast; + + cast = lmod_cast_u(po, lmod); + scast = lmod_cast_s(po, lmod); + + switch (pfo) { + case PFO_C: + // note: must be unsigned compare + snprintf(buf, buf_size, "(%s%s %s %s%s)", + cast, expr1, is_inv ? ">=" : "<", cast, expr2); + break; + + case PFO_Z: + snprintf(buf, buf_size, "(%s%s %s %s%s)", + cast, expr1, is_inv ? "!=" : "==", cast, expr2); + break; + + case PFO_BE: // !a + // note: must be unsigned compare + snprintf(buf, buf_size, "(%s%s %s %s%s)", + cast, expr1, is_inv ? ">" : "<=", cast, expr2); + break; + + // note: must be signed compare + case PFO_S: + snprintf(buf, buf_size, "(%s(%s - %s) %s 0)", + scast, expr1, expr2, is_inv ? ">=" : "<"); + break; + case PFO_L: // !ge + snprintf(buf, buf_size, "(%s%s %s %s%s)", + scast, expr1, is_inv ? ">=" : "<", scast, expr2); + break; + case PFO_LE: + snprintf(buf, buf_size, "(%s%s %s %s%s)", + scast, expr1, is_inv ? ">" : "<=", scast, expr2); + break; - fprintf(fout, "}\n\n"); - proto_release(&pp); - return 0; + default: + ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo); + } +} + +static void out_cmp_test(char *buf, size_t buf_size, + struct parsed_op *po, enum parsed_flag_op pfo, int is_inv) +{ + char buf1[256], buf2[256], buf3[256]; + + if (po->op == OP_TEST) { + if (IS(opr_name(po, 0), opr_name(po, 1))) { + out_src_opr(buf3, sizeof(buf3), po, &po->operand[0], 0); + } + else { + out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], 0); + out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0); + snprintf(buf3, sizeof(buf3), "(%s & %s)", buf1, buf2); + } + out_test_for_cc(buf, buf_size, po, pfo, is_inv, + po->operand[0].lmod, buf3); + } + else if (po->op == OP_CMP) { + out_src_opr(buf2, sizeof(buf2), po, &po->operand[0], 0); + out_src_opr(buf3, sizeof(buf3), po, &po->operand[1], 0); + out_cmp_for_cc(buf, buf_size, po, pfo, is_inv, + po->operand[0].lmod, buf2, buf3); + } + else + ferr(po, "%s: unhandled op: %d\n", __func__, po->op); +} + +static void propagate_lmod(struct parsed_op *po, struct parsed_opr *popr1, + struct parsed_opr *popr2) +{ + if (popr1->lmod == OPLM_UNSPEC && popr2->lmod == OPLM_UNSPEC) + ferr(po, "missing lmod for both operands\n"); + + if (popr1->lmod == OPLM_UNSPEC) + popr1->lmod = popr2->lmod; + else if (popr2->lmod == OPLM_UNSPEC) + popr2->lmod = popr1->lmod; + else if (popr1->lmod != popr2->lmod) + ferr(po, "conflicting lmods: %d vs %d\n", popr1->lmod, popr2->lmod); +} + +static const char *op_to_c(struct parsed_op *po) +{ + switch (po->op) + { + case OP_ADD: + case OP_ADC: + return "+"; + case OP_SUB: + case OP_SBB: + return "-"; + case OP_AND: + return "&"; + case OP_OR: + return "|"; + case OP_XOR: + return "^"; + case OP_SHL: + return "<<"; + case OP_SHR: + return ">>"; + case OP_MUL: + case OP_IMUL: + return "*"; + default: + ferr(po, "op_to_c was supplied with %d\n", po->op); + } +} + +static int scan_for_pop(int i, int opcnt, const char *reg, + int magic, int do_patch) +{ + struct parsed_op *po; + int ret = 0; + + for (; i < opcnt; i++) { + po = &ops[i]; + if (po->cc_scratch == magic) + break; // already checked + po->cc_scratch = magic; + + if (po->flags & OPF_TAIL) + return -1; // deadend + + if (po->flags & OPF_RMD) + continue; + + if ((po->flags & OPF_JMP) && po->op != OP_CALL) { + if (po->bt_i < 0) { + ferr(po, "dead branch\n"); + return -1; + } + + if (po->flags & OPF_CC) { + ret |= scan_for_pop(po->bt_i, opcnt, reg, magic, do_patch); + if (ret < 0) + return ret; // dead end + } + else { + i = po->bt_i - 1; + } + continue; + } + + if (po->op == OP_POP && po->operand[0].type == OPT_REG + && IS(po->operand[0].name, reg)) + { + if (do_patch) + po->flags |= OPF_RMD; + return 1; + } + } + + return ret; +} + +// scan for pop starting from 'ret' op (all paths) +static int scan_for_pop_ret(int i, int opcnt, const char *reg, int do_patch) +{ + int found = 0; + int j; + + for (; i < opcnt; i++) { + if (!(ops[i].flags & OPF_TAIL)) + continue; + + for (j = i - 1; j >= 0; j--) { + if (ops[j].flags & OPF_RMD) + continue; + if (ops[j].flags & OPF_JMP) + return -1; + + if (ops[j].op == OP_POP && ops[j].operand[0].type == OPT_REG + && IS(ops[j].operand[0].name, reg)) + { + found = 1; + if (do_patch) + ops[j].flags |= OPF_RMD; + break; + } + + if (g_labels[j][0] != 0) + return -1; + } + } + + return found ? 0 : -1; +} + +// is operand 'opr modified' by parsed_op 'po'? +static int is_opr_modified(const struct parsed_opr *opr, + const struct parsed_op *po) +{ + if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA)) + return 0; + + if (opr->type == OPT_REG && po->operand[0].type == OPT_REG) { + if (po->regmask_dst & (1 << opr->reg)) + return 1; + else + return 0; + } + + return IS(po->operand[0].name, opr->name); +} + +// is any operand of parsed_op 'po_test' modified by parsed_op 'po'? +static int is_any_opr_modified(const struct parsed_op *po_test, + const struct parsed_op *po) +{ + int i; + + if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA)) + return 0; + + if (po_test->regmask_src & po->regmask_dst) + return 1; + + for (i = 0; i < po_test->operand_cnt; i++) + if (IS(po_test->operand[i].name, po->operand[0].name)) + return 1; + + return 0; +} + +// scan for any po_test operand modification in range given +static int scan_for_mod(struct parsed_op *po_test, int i, int opcnt) +{ + for (; i < opcnt; i++) { + if (is_any_opr_modified(po_test, &ops[i])) + return i; + } + + return -1; +} + +// scan for po_test operand[0] modification in range given +static int scan_for_mod_opr0(struct parsed_op *po_test, + int i, int opcnt) +{ + for (; i < opcnt; i++) { + if (is_opr_modified(&po_test->operand[0], &ops[i])) + return i; + } + + return -1; +} + +static int scan_for_flag_set(int i) +{ + for (; i >= 0; i--) { + if (ops[i].flags & OPF_FLAGS) + return i; + + if ((ops[i].flags & OPF_JMP) && !(ops[i].flags & OPF_CC)) + return -1; + if (g_labels[i][0] != 0) + return -1; + } + + return -1; +} + +// scan back for cdq, if anything modifies edx, fail +static int scan_for_cdq_edx(int i) +{ + for (; i >= 0; i--) { + if (ops[i].op == OP_CDQ) + return i; + + if (ops[i].regmask_dst & (1 << xDX)) + return -1; + if (g_labels[i][0] != 0) + return -1; + } + + return -1; +} + +static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt) +{ + struct parsed_op *po, *delayed_flag_op = NULL, *tmp_op; + struct parsed_opr *last_arith_dst = NULL; + char buf1[256], buf2[256], buf3[256]; + struct parsed_proto *pp, *pp_tmp; + const char *tmpname; + enum parsed_flag_op pfo; + int save_arg_vars = 0; + int cmp_result_vars = 0; + int need_mul_var = 0; + int had_decl = 0; + int regmask_arg = 0; + int regmask = 0; + int pfomask = 0; + int no_output; + int dummy; + int arg; + int i, j; + int reg; + int ret; + + g_bp_frame = g_bp_stack = 0; + + ret = proto_parse(fhdr, funcn, &g_func_pp); + if (ret) + ferr(ops, "proto_parse failed for '%s'\n", funcn); + + fprintf(fout, "%s %s(", g_func_pp.ret_type, funcn); + for (i = 0; i < g_func_pp.argc; i++) { + if (i > 0) + fprintf(fout, ", "); + fprintf(fout, "%s a%d", g_func_pp.arg[i].type, i + 1); + } + fprintf(fout, ")\n{\n"); + + // pass1: + // - handle ebp frame, remove ops related to it + if (ops[0].op == OP_PUSH && IS(opr_name(&ops[0], 0), "ebp") + && ops[1].op == OP_MOV + && IS(opr_name(&ops[1], 0), "ebp") + && IS(opr_name(&ops[1], 1), "esp")) + { + int ecx_push = 0; + + g_bp_frame = 1; + ops[0].flags |= OPF_RMD; + ops[1].flags |= OPF_RMD; + + if (ops[2].op == OP_SUB && IS(opr_name(&ops[2], 0), "esp")) { + g_bp_stack = opr_const(&ops[2], 1); + ops[2].flags |= OPF_RMD; + } + else { + // another way msvc builds stack frame.. + i = 2; + while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) { + g_bp_stack += 4; + ops[i].flags |= OPF_RMD; + ecx_push++; + i++; + } + } + + i = 2; + do { + for (; i < opcnt; i++) + if (ops[i].op == OP_RET) + break; + if (ops[i - 1].op != OP_POP || !IS(opr_name(&ops[i - 1], 0), "ebp")) + ferr(&ops[i - 1], "'pop ebp' expected\n"); + ops[i - 1].flags |= OPF_RMD; + + if (g_bp_stack != 0) { + if (ops[i - 2].op != OP_MOV + || !IS(opr_name(&ops[i - 2], 0), "esp") + || !IS(opr_name(&ops[i - 2], 1), "ebp")) + { + ferr(&ops[i - 2], "esp restore expected\n"); + } + ops[i - 2].flags |= OPF_RMD; + + if (ecx_push && ops[i - 3].op == OP_POP + && IS(opr_name(&ops[i - 3], 0), "ecx")) + { + ferr(&ops[i - 3], "unexpected ecx pop\n"); + } + } + + i++; + } while (i < opcnt); + } + + // pass2: + // - resolve all branches + for (i = 0; i < opcnt; i++) { + po = &ops[i]; + po->bt_i = -1; + + if ((po->flags & OPF_RMD) || !(po->flags & OPF_JMP) + || po->op == OP_CALL || po->op == OP_RET) + continue; + + for (j = 0; j < opcnt; j++) { + if (g_labels[j][0] && IS(po->operand[0].name, g_labels[j])) { + po->bt_i = j; + po->lrl = g_label_refs[j]; + g_label_refs[j] = po; + break; + } + } + + if (po->bt_i == -1) { + // assume tail call + po->op = OP_CALL; + po->flags |= OPF_TAIL; + } + } + + // pass3: + // - find POPs for PUSHes, rm both + // - scan for all used registers + // - find flag set ops for their users + // - process calls + for (i = 0; i < opcnt; i++) { + po = &ops[i]; + if (po->flags & OPF_RMD) + continue; + + if (po->op == OP_PUSH && po->operand[0].type == OPT_REG) { + if (po->operand[0].reg < 0) + ferr(po, "reg not set for push?\n"); + if (!(regmask & (1 << po->operand[0].reg))) { // reg save + ret = scan_for_pop(i + 1, opcnt, + po->operand[0].name, i + opcnt, 0); + if (ret == 1) { + po->flags |= OPF_RMD; + scan_for_pop(i + 1, opcnt, po->operand[0].name, + i + opcnt * 2, 1); + continue; + } + ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, 0); + if (ret == 0) { + po->flags |= OPF_RMD; + scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, 1); + continue; + } + } + } + + regmask |= po->regmask_src | po->regmask_dst; + + if (po->flags & OPF_CC) + { + ret = scan_for_flag_set(i - 1); + if (ret < 0) + ferr(po, "unable to trace flag setter\n"); + + tmp_op = &ops[ret]; // flag setter + pfo = split_cond(po, po->op, &dummy); + pfomask = 0; + + // to get nicer code, we try to delay test and cmp; + // if we can't because of operand modification, or if we + // have math op, make it calculate flags explicitly + if (tmp_op->op == OP_TEST || tmp_op->op == OP_CMP) { + if (scan_for_mod(tmp_op, ret + 1, i) >= 0) + pfomask = 1 << pfo; + } + else { + if ((pfo != PFO_Z && pfo != PFO_S && pfo != PFO_P) + || scan_for_mod_opr0(tmp_op, ret + 1, i) >= 0) + pfomask = 1 << pfo; + } + if (pfomask) { + tmp_op->pfomask |= pfomask; + cmp_result_vars |= pfomask; + po->datap = tmp_op; + } + + if (po->op == OP_ADC || po->op == OP_SBB) + cmp_result_vars |= 1 << PFO_C; + } + else if (po->op == OP_CALL) + { + pp = malloc(sizeof(*pp)); + my_assert_not(pp, NULL); + tmpname = opr_name(&ops[i], 0); + ret = proto_parse(fhdr, tmpname, pp); + if (ret) + ferr(po, "proto_parse failed for '%s'\n", tmpname); + + for (arg = 0; arg < pp->argc; arg++) + if (pp->arg[arg].reg == NULL) + break; + + for (j = i - 1; j >= 0 && arg < pp->argc; j--) { + if (ops[j].op == OP_CALL) { + pp_tmp = ops[j].datap; + if (pp_tmp == NULL) + ferr(po, "arg collect hit unparsed call\n"); + if (pp_tmp->argc_stack > 0) + ferr(po, "arg collect hit '%s' with %d stack args\n", + opr_name(&ops[j], 0), pp_tmp->argc_stack); + } + else if ((ops[j].flags & OPF_TAIL) + || (ops[j].flags & (OPF_JMP|OPF_CC)) == OPF_JMP) + { + break; + } + + if (ops[j].op == OP_PUSH) { + pp->arg[arg].datap = &ops[j]; + ret = scan_for_mod(&ops[j], j + 1, i); + if (ret >= 0) { + // mark this push as one that needs operand saving + ops[j].argmask |= 1 << arg; + save_arg_vars |= 1 << arg; + } + else + ops[j].flags |= OPF_RMD; + + // next arg + for (arg++; arg < pp->argc; arg++) + if (pp->arg[arg].reg == NULL) + break; + } + + if (g_labels[j][0] != 0) { + if (j > 0 && ((ops[j - 1].flags & OPF_TAIL) + || (ops[j - 1].flags & (OPF_JMP|OPF_CC)) == OPF_JMP)) + { + // follow the branch in reverse + if (g_label_refs[j] == NULL) + ferr(po, "no refs for '%s'?\n", g_labels[j]); + if (g_label_refs[j]->lrl != NULL) + ferr(po, "unhandled multiple fefs to '%s'\n", g_labels[j]); + j = (g_label_refs[j] - ops) + 1; + continue; + } + break; + } + } + if (arg < pp->argc) + ferr(po, "arg collect failed for '%s'\n", tmpname); + po->datap = pp; + } + else if (po->op == OP_MUL + || (po->op == OP_IMUL && po->operand_cnt == 1)) + { + need_mul_var = 1; + } + } + + // declare stack frame + if (g_bp_stack) + fprintf(fout, " union { u32 d[%d]; u16 w[%d]; u8 b[%d]; } sf;\n", + (g_bp_stack + 3) / 4, (g_bp_stack + 1) / 2, g_bp_stack); + + // declare arg-registers + for (i = 0; i < g_func_pp.argc; i++) { + if (g_func_pp.arg[i].reg != NULL) { + reg = char_array_i(regs_r32, + ARRAY_SIZE(regs_r32), g_func_pp.arg[i].reg); + if (reg < 0) + ferr(ops, "arg '%s' is not a reg?\n", g_func_pp.arg[i].reg); + + regmask_arg |= 1 << reg; + fprintf(fout, " u32 %s = (u32)a%d;\n", + g_func_pp.arg[i].reg, i + 1); + had_decl = 1; + } + } + + // declare other regs - special case for eax + if (!((regmask | regmask_arg) & 1) && !IS(g_func_pp.ret_type, "void")) { + fprintf(fout, " u32 eax = 0;\n"); + had_decl = 1; + } + + regmask &= ~regmask_arg; + if (g_bp_frame) + regmask &= ~(1 << xBP); + if (regmask) { + for (reg = 0; reg < 8; reg++) { + if (regmask & (1 << reg)) { + fprintf(fout, " u32 %s;\n", regs_r32[reg]); + had_decl = 1; + } + } + } + + if (save_arg_vars) { + for (reg = 0; reg < 32; reg++) { + if (save_arg_vars & (1 << reg)) { + fprintf(fout, " u32 s_a%d;\n", reg + 1); + had_decl = 1; + } + } + } + + if (cmp_result_vars) { + for (i = 0; i < 8; i++) { + if (cmp_result_vars & (1 << i)) { + fprintf(fout, " u32 cond_%s;\n", parsed_flag_op_names[i]); + had_decl = 1; + } + } + } + + if (need_mul_var) { + fprintf(fout, " u64 mul_tmp;\n"); + had_decl = 1; + } + + if (had_decl) + fprintf(fout, "\n"); + + // output ops + for (i = 0; i < opcnt; i++) + { + if (g_labels[i][0] != 0) + fprintf(fout, "\n%s:\n", g_labels[i]); + + po = &ops[i]; + if (po->flags & OPF_RMD) + continue; + + no_output = 0; + + #define assert_operand_cnt(n_) \ + if (po->operand_cnt != n_) \ + ferr(po, "operand_cnt is %d/%d\n", po->operand_cnt, n_) + + // conditional/flag using op? + if (po->flags & OPF_CC) + { + int is_delayed = 0; + int is_inv = 0; + + pfo = split_cond(po, po->op, &is_inv); + + // we go through all this trouble to avoid using parsed_flag_op, + // which makes generated code much nicer + if (delayed_flag_op != NULL) + { + out_cmp_test(buf1, sizeof(buf1), delayed_flag_op, pfo, is_inv); + is_delayed = 1; + } + else if (last_arith_dst != NULL + && (pfo == PFO_Z || pfo == PFO_S || pfo == PFO_P)) + { + out_src_opr(buf3, sizeof(buf3), po, last_arith_dst, 0); + out_test_for_cc(buf1, sizeof(buf1), po, pfo, is_inv, + last_arith_dst->lmod, buf3); + is_delayed = 1; + } + else if (po->datap != NULL) { + // use preprocessed results + tmp_op = po->datap; + if (!tmp_op || !(tmp_op->pfomask & (1 << pfo))) + ferr(po, "not prepared for pfo %d\n", pfo); + + // note: is_inv was not yet applied + snprintf(buf1, sizeof(buf1), "(%scond_%s)", + is_inv ? "!" : "", parsed_flag_op_names[pfo]); + } + else { + ferr(po, "all methods of finding comparison failed\n"); + } + + if (po->flags & OPF_JMP) { + fprintf(fout, " if %s\n", buf1); + } + else if (po->op == OP_ADC || po->op == OP_SBB) { + if (is_delayed) + fprintf(fout, " cond_%s = %s;\n", + parsed_flag_op_names[pfo], buf1); + } + else if (po->flags & OPF_DATA) { // SETcc + out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]); + fprintf(fout, " %s = %s;", buf2, buf1); + } + else { + ferr(po, "unhandled conditional op\n"); + } + } + + pfomask = po->pfomask; + + switch (po->op) + { + case OP_MOV: + assert_operand_cnt(2); + propagate_lmod(po, &po->operand[0], &po->operand[1]); + fprintf(fout, " %s = %s;", + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), + out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0)); + break; + + case OP_LEA: + assert_operand_cnt(2); + po->operand[1].lmod = OPLM_DWORD; // always + fprintf(fout, " %s = %s;", + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), + out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 1)); + break; + + case OP_MOVZX: + assert_operand_cnt(2); + fprintf(fout, " %s = %s;", + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), + out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0)); + break; + + case OP_MOVSX: + assert_operand_cnt(2); + switch (po->operand[1].lmod) { + case OPLM_BYTE: + strcpy(buf3, "(s8)"); + break; + case OPLM_WORD: + strcpy(buf3, "(s16)"); + break; + default: + ferr(po, "invalid src lmod: %d\n", po->operand[1].lmod); + } + fprintf(fout, " %s = %s%s;", + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), + buf3, + out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0)); + break; + + case OP_NOT: + assert_operand_cnt(1); + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); + fprintf(fout, " %s = ~%s;", buf1, buf1); + break; + + case OP_CDQ: + assert_operand_cnt(2); + fprintf(fout, " %s = (s32)%s >> 31;", + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), + out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0)); + strcpy(g_comment, "cdq"); + break; + + case OP_STOS: + // assumes DF=0 + assert_operand_cnt(3); + if (po->flags & OPF_REP) { + fprintf(fout, " for (; ecx != 0; ecx--, edi += %d)\n", + lmod_bytes(po, po->operand[0].lmod)); + fprintf(fout, " *(u32 *)edi = eax;"); + strcpy(g_comment, "rep stos"); + } + else { + fprintf(fout, " *(u32 *)edi = eax; edi += %d;", + lmod_bytes(po, po->operand[0].lmod)); + strcpy(g_comment, "stos"); + } + break; + + // arithmetic w/flags + case OP_ADD: + case OP_SUB: + case OP_AND: + case OP_OR: + propagate_lmod(po, &po->operand[0], &po->operand[1]); + // fallthrough + case OP_SHL: + case OP_SHR: + dualop_arith: + assert_operand_cnt(2); + fprintf(fout, " %s %s= %s;", + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), + op_to_c(po), + out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0)); + last_arith_dst = &po->operand[0]; + delayed_flag_op = NULL; + break; + + case OP_XOR: + assert_operand_cnt(2); + propagate_lmod(po, &po->operand[0], &po->operand[1]); + if (IS(opr_name(po, 0), opr_name(po, 1))) { + // special case for XOR + fprintf(fout, " %s = 0;", + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0])); + last_arith_dst = &po->operand[0]; + delayed_flag_op = NULL; + break; + } + goto dualop_arith; + + case OP_SAR: + assert_operand_cnt(2); + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); + fprintf(fout, " %s = %s%s >> %s;", buf1, + lmod_cast_s(po, po->operand[0].lmod), buf1, + out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0)); + last_arith_dst = &po->operand[0]; + delayed_flag_op = NULL; + break; + + case OP_ADC: + case OP_SBB: + assert_operand_cnt(2); + propagate_lmod(po, &po->operand[0], &po->operand[1]); + fprintf(fout, " %s %s= %s + cond_c;", + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]), + op_to_c(po), + out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0)); + last_arith_dst = &po->operand[0]; + delayed_flag_op = NULL; + break; + + case OP_INC: + case OP_DEC: + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); + strcpy(buf2, po->op == OP_INC ? "++" : "--"); + fprintf(fout, " %s%s;", buf1, buf2); + last_arith_dst = &po->operand[0]; + delayed_flag_op = NULL; + break; + + case OP_NEG: + out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]); + out_src_opr(buf2, sizeof(buf2), po, &po->operand[0], 0); + fprintf(fout, " %s = -%s%s;", buf1, + lmod_cast_s(po, po->operand[0].lmod), buf2); + last_arith_dst = &po->operand[0]; + delayed_flag_op = NULL; + if (pfomask & (1 << PFO_C)) { + fprintf(fout, "\n cond_c = (%s != 0);", buf1); + pfomask &= ~(1 << PFO_C); + } + break; + + case OP_IMUL: + if (po->operand_cnt == 2) + goto dualop_arith; + if (po->operand_cnt == 3) + ferr(po, "TODO imul3\n"); + // fallthrough + case OP_MUL: + assert_operand_cnt(1); + strcpy(buf1, po->op == OP_IMUL ? "(s64)(s32)" : "(u64)"); + fprintf(fout, " mul_tmp = %seax * %s%s;\n", buf1, buf1, + out_src_opr(buf2, sizeof(buf2), po, &po->operand[0], 0)); + fprintf(fout, " edx = mul_tmp >> 32;\n"); + fprintf(fout, " eax = mul_tmp;"); + last_arith_dst = NULL; + delayed_flag_op = NULL; + break; + + case OP_DIV: + case OP_IDIV: + assert_operand_cnt(1); + if (po->operand[0].lmod != OPLM_DWORD) + ferr(po, "unhandled lmod %d\n", po->operand[0].lmod); + + // 32bit division is common, look for it + if (scan_for_cdq_edx(i - 1) >= 0) { + out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], 0); + strcpy(buf2, lmod_cast(po, po->operand[0].lmod, + po->op == OP_IDIV)); + fprintf(fout, " edx = %seax %% %s%s;\n", buf2, buf2, buf1); + fprintf(fout, " eax = %seax / %s%s;", buf2, buf2, buf1); + } + else + ferr(po, "TODO 64bit divident\n"); + last_arith_dst = NULL; + delayed_flag_op = NULL; + break; + + case OP_TEST: + case OP_CMP: + propagate_lmod(po, &po->operand[0], &po->operand[1]); + if (pfomask != 0) { + for (j = 0; j < 8; j++) { + if (pfomask & (1 << j)) { + out_cmp_test(buf1, sizeof(buf1), po, j, 0); + fprintf(fout, " cond_%s = %s;", + parsed_flag_op_names[j], buf1); + } + } + pfomask = 0; + } + else + no_output = 1; + delayed_flag_op = po; + break; + + // note: we reuse OP_Jcc for SETcc, only flags differ + case OP_JO ... OP_JG: + if (po->flags & OPF_JMP) + fprintf(fout, " goto %s;", po->operand[0].name); + // else SETcc - should already be handled + break; + + case OP_JMP: + assert_operand_cnt(1); + if (po->operand[0].type != OPT_LABEL) + ferr(po, "unhandled call type\n"); + + fprintf(fout, " goto %s;", po->operand[0].name); + break; + + case OP_CALL: + assert_operand_cnt(1); + if (po->operand[0].type != OPT_LABEL) + ferr(po, "unhandled call type\n"); + + pp = po->datap; + if (pp == NULL) + ferr(po, "NULL pp\n"); + + fprintf(fout, " "); + if (!IS(pp->ret_type, "void")) { + if (po->flags & OPF_TAIL) + fprintf(fout, "return "); + else + fprintf(fout, "eax = "); + if (strchr(pp->ret_type, '*')) + fprintf(fout, "(u32)"); + } + + fprintf(fout, "%s(", opr_name(po, 0)); + for (arg = 0; arg < pp->argc; arg++) { + if (arg > 0) + fprintf(fout, ", "); + + if (strchr(pp->arg[arg].type, '*')) + fprintf(fout, "(%s)", pp->arg[arg].type); + + if (pp->arg[arg].reg != NULL) { + fprintf(fout, "%s", pp->arg[arg].reg); + continue; + } + + // stack arg + tmp_op = pp->arg[arg].datap; + if (tmp_op == NULL) + ferr(po, "parsed_op missing for arg%d\n", arg); + if (tmp_op->argmask) { + fprintf(fout, "s_a%d", arg + 1); + } + else { + fprintf(fout, "%s", + out_src_opr(buf1, sizeof(buf1), + tmp_op, &tmp_op->operand[0], 0)); + } + } + fprintf(fout, ");"); + + if (po->flags & OPF_TAIL) { + strcpy(g_comment, "tailcall"); + if (IS(pp->ret_type, "void")) + fprintf(fout, "\n return;"); + } + delayed_flag_op = NULL; + last_arith_dst = NULL; + break; + + case OP_RET: + if (IS(g_func_pp.ret_type, "void")) + fprintf(fout, " return;"); + else + fprintf(fout, " return eax;"); + break; + + case OP_PUSH: + if (po->argmask) { + // special case - saved func arg + for (j = 0; j < 32; j++) { + if (po->argmask & (1 << j)) { + fprintf(fout, " s_a%d = %s;", j + 1, + out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], 0)); + } + } + break; + } + ferr(po, "push encountered\n"); + break; + + case OP_POP: + ferr(po, "pop encountered\n"); + break; + + case OP_NOP: + break; + + default: + no_output = 1; + ferr(po, "unhandled op type %d, flags %x\n", + po->op, po->flags); + break; + } + + if (g_comment[0] != 0) { + fprintf(fout, " // %s", g_comment); + g_comment[0] = 0; + no_output = 0; + } + if (!no_output) + fprintf(fout, "\n"); + + if (pfomask != 0) + ferr(po, "missed flag calc, pfomask=%x\n", pfomask); + + // see is delayed flag stuff is still valid + if (delayed_flag_op != NULL && delayed_flag_op != po) { + if (is_any_opr_modified(delayed_flag_op, po)) + delayed_flag_op = NULL; + } + + if (last_arith_dst != NULL && last_arith_dst != &po->operand[0]) { + if (is_opr_modified(last_arith_dst, po)) + last_arith_dst = NULL; + } + } + + fprintf(fout, "}\n\n"); + + // cleanup + for (i = 0; i < opcnt; i++) { + if (ops[i].op == OP_CALL) { + pp = ops[i].datap; + if (pp) { + proto_release(pp); + free(pp); + } + } + } + proto_release(&g_func_pp); } int main(int argc, char *argv[]) { - FILE *fout, *fasm, *fhdr; - char line[256]; - char words[16][256]; - char func[256]; - int in_func = 0; - int pi = 0; - int len; - char *p; - int wordc; - - if (argc != 4) { - printf("usage:\n%s <.c> <.asm> \n", - argv[0]); - return 1; - } + FILE *fout, *fasm, *fhdr; + char line[256]; + char words[16][256]; + int in_func = 0; + int skip_warned = 0; + int eq_alloc; + int pi = 0; + int len; + char *p; + int wordc; - hdrfn = argv[3]; - fhdr = fopen(hdrfn, "r"); - my_assert_not(fhdr, NULL); + if (argc != 4) { + printf("usage:\n%s <.c> <.asm> \n", + argv[0]); + return 1; + } - asmfn = argv[2]; - fasm = fopen(asmfn, "r"); - my_assert_not(fasm, NULL); + hdrfn = argv[3]; + fhdr = fopen(hdrfn, "r"); + my_assert_not(fhdr, NULL); - fout = fopen(argv[1], "w"); - my_assert_not(fout, NULL); + asmfn = argv[2]; + fasm = fopen(asmfn, "r"); + my_assert_not(fasm, NULL); + fout = fopen(argv[1], "w"); + my_assert_not(fout, NULL); - while (fgets(line, sizeof(line), fasm)) - { - asmln++; + eq_alloc = 128; + g_eqs = malloc(eq_alloc * sizeof(g_eqs[0])); + my_assert_not(g_eqs, NULL); - p = sskip(line); - if (*p == 0 || *p == ';') - continue; + while (fgets(line, sizeof(line), fasm)) + { + asmln++; - memset(words, 0, sizeof(words)); - for (wordc = 0; wordc < 16; wordc++) { - p = sskip(next_word(words[wordc], sizeof(words[0]), p)); - if (*p == 0 || *p == ';') { - wordc++; - break; - } - } + p = sskip(line); + if (*p == 0 || *p == ';') + continue; - if (wordc == 0) { - // shouldn't happen - awarn("wordc == 0?\n"); - continue; - } + memset(words, 0, sizeof(words)); + for (wordc = 0; wordc < 16; wordc++) { + p = sskip(next_word(words[wordc], sizeof(words[0]), p)); + if (*p == 0 || *p == ';') { + wordc++; + break; + } + } - // don't care about this: - if (words[0][0] == '.' - || IS(words[0], "include") - || IS(words[0], "assume") || IS(words[1], "segment") - || IS(words[0], "align")) - { - continue; - } + if (wordc == 0) { + // shouldn't happen + awarn("wordc == 0?\n"); + continue; + } - if (IS(words[1], "proc")) { - if (in_func) - aerr("proc '%s' while in_func '%s'?\n", - words[0], func); - strcpy(func, words[0]); - in_func = 1; - continue; - } + // don't care about this: + if (words[0][0] == '.' + || IS(words[0], "include") + || IS(words[0], "assume") || IS(words[1], "segment") + || IS(words[0], "align")) + { + continue; + } - if (IS(words[1], "endp")) { - if (!in_func) - aerr("endp '%s' while not in_func?\n", words[0]); - if (!IS(func, words[0])) - aerr("endp '%s' while in_func '%s'?\n", - words[0], func); - gen_func(fout, fhdr, func, pi); - in_func = 0; - func[0] = 0; - if (pi != 0) { - memset(&ops, 0, pi * sizeof(ops[0])); - memset(labels, 0, pi * sizeof(labels[0])); - pi = 0; - } - exit(1); - continue; - } + if (IS(words[1], "proc")) { + if (in_func) + aerr("proc '%s' while in_func '%s'?\n", + words[0], g_func); + strcpy(g_func, words[0]); + in_func = 1; + continue; + } - if (IS(words[1], "=")) - // lots of work will be have to be done here, but for now.. - continue; - - if (pi >= ARRAY_SIZE(ops)) - aerr("too many ops\n"); - - p = strchr(words[0], ':'); - if (p != NULL) { - len = p - words[0]; - if (len > sizeof(labels[0]) - 1) - aerr("label too long: %d\n", len); - if (labels[pi][0] != 0) - aerr("dupe label?\n"); - memcpy(labels[pi], words[0], len); - labels[pi][len] = 0; - continue; - } + if (IS(words[1], "endp")) { + if (!in_func) + aerr("endp '%s' while not in_func?\n", words[0]); + if (!IS(g_func, words[0])) + aerr("endp '%s' while in_func '%s'?\n", + words[0], g_func); + gen_func(fout, fhdr, g_func, pi); + in_func = 0; + skip_warned = 0; + g_func[0] = 0; + if (pi != 0) { + memset(&ops, 0, pi * sizeof(ops[0])); + memset(g_labels, 0, pi * sizeof(g_labels[0])); + memset(g_label_refs, 0, pi * sizeof(g_label_refs[0])); + pi = 0; + } + g_eqcnt = 0; + continue; + } - parse_op(&ops[pi], words, wordc); - pi++; + if (IS(words[1], "=")) { + if (wordc != 5) + aerr("unhandled equ, wc=%d\n", wordc); + if (g_eqcnt >= eq_alloc) { + eq_alloc *= 2; + g_eqs = realloc(g_eqs, eq_alloc * sizeof(g_eqs[0])); + my_assert_not(g_eqs, NULL); + } - (void)proto_parse; - } + len = strlen(words[0]); + if (len > sizeof(g_eqs[0].name) - 1) + aerr("equ name too long: %d\n", len); + strcpy(g_eqs[g_eqcnt].name, words[0]); + + if (!IS(words[3], "ptr")) + aerr("unhandled equ\n"); + if (IS(words[2], "dword")) + g_eqs[g_eqcnt].lmod = OPLM_DWORD; + else if (IS(words[2], "word")) + g_eqs[g_eqcnt].lmod = OPLM_WORD; + else if (IS(words[2], "byte")) + g_eqs[g_eqcnt].lmod = OPLM_BYTE; + else + aerr("bad lmod: '%s'\n", words[2]); + + g_eqs[g_eqcnt].offset = parse_number(words[4]); + g_eqcnt++; + continue; + } - fclose(fout); - fclose(fasm); - fclose(fhdr); + if (pi >= ARRAY_SIZE(ops)) + aerr("too many ops\n"); - return 0; + p = strchr(words[0], ':'); + if (p != NULL) { + len = p - words[0]; + if (len > sizeof(g_labels[0]) - 1) + aerr("label too long: %d\n", len); + if (g_labels[pi][0] != 0) + aerr("dupe label?\n"); + memcpy(g_labels[pi], words[0], len); + g_labels[pi][len] = 0; + continue; + } + + if (!in_func) { + if (!skip_warned && g_labels[pi][0] != 0) { + anote("skipping from '%s'\n", g_labels[pi]); + skip_warned = 1; + } + g_labels[pi][0] = 0; + continue; + } + + parse_op(&ops[pi], words, wordc); + pi++; + } + + fclose(fout); + fclose(fasm); + fclose(fhdr); + + return 0; } + +// vim:ts=2:shiftwidth=2:expandtab