+
+static void out_cmp_for_cc(char *buf, size_t buf_size,
+ struct parsed_op *po, enum parsed_flag_op pfo, int is_inv)
+{
+ const char *cast, *scast, *cast_use;
+ char buf1[256], buf2[256];
+ enum opr_lenmod lmod;
+
+ if (po->operand[0].lmod != po->operand[1].lmod)
+ ferr(po, "%s: lmod mismatch: %d %d\n", __func__,
+ po->operand[0].lmod, po->operand[1].lmod);
+ lmod = po->operand[0].lmod;
+
+ cast = lmod_cast_u(po, lmod);
+ scast = lmod_cast_s(po, lmod);
+
+ switch (pfo) {
+ case PFO_C:
+ case PFO_Z:
+ case PFO_BE: // !a
+ cast_use = cast;
+ break;
+
+ case PFO_S:
+ case PFO_L: // !ge
+ case PFO_LE:
+ cast_use = scast;
+ break;
+
+ default:
+ ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo);
+ }
+
+ out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], cast_use, 0);
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], cast_use, 0);
+
+ switch (pfo) {
+ case PFO_C:
+ // note: must be unsigned compare
+ snprintf(buf, buf_size, "(%s %s %s)",
+ buf1, is_inv ? ">=" : "<", buf2);
+ break;
+
+ case PFO_Z:
+ snprintf(buf, buf_size, "(%s %s %s)",
+ buf1, is_inv ? "!=" : "==", buf2);
+ break;
+
+ case PFO_BE: // !a
+ // note: must be unsigned compare
+ snprintf(buf, buf_size, "(%s %s %s)",
+ buf1, is_inv ? ">" : "<=", buf2);
+
+ // annoying case
+ if (is_inv && lmod == OPLM_BYTE
+ && po->operand[1].type == OPT_CONST
+ && po->operand[1].val == 0xff)
+ {
+ snprintf(g_comment, sizeof(g_comment), "if %s", buf);
+ snprintf(buf, buf_size, "(0)");
+ }
+ break;
+
+ // note: must be signed compare
+ case PFO_S:
+ snprintf(buf, buf_size, "(%s(%s - %s) %s 0)",
+ scast, buf1, buf2, is_inv ? ">=" : "<");
+ break;
+
+ case PFO_L: // !ge
+ snprintf(buf, buf_size, "(%s %s %s)",
+ buf1, is_inv ? ">=" : "<", buf2);
+ break;
+
+ case PFO_LE:
+ snprintf(buf, buf_size, "(%s %s %s)",
+ buf1, is_inv ? ">" : "<=", buf2);
+ break;
+
+ default:
+ break;
+ }
+}
+
+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_u32(buf3, sizeof(buf3), po, &po->operand[0]);
+ }
+ else {
+ out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]);
+ 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_cmp_for_cc(buf, buf_size, po, pfo, is_inv);
+ }
+ 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) {
+ if (popr1->type_from_var) {
+ popr1->size_mismatch = 1;
+ if (popr1->lmod < popr2->lmod)
+ popr1->size_lt = 1;
+ popr1->lmod = popr2->lmod;
+ }
+ else if (popr2->type_from_var) {
+ popr2->size_mismatch = 1;
+ if (popr2->lmod < popr1->lmod)
+ popr2->size_lt = 1;
+ popr2->lmod = popr1->lmod;
+ }
+ else
+ 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 void op_set_clear_flag(struct parsed_op *po,
+ enum op_flags flag_set, enum op_flags flag_clear)
+{
+ po->flags |= flag_set;
+ po->flags &= ~flag_clear;
+}
+
+// last op in stream - unconditional branch or ret
+#define LAST_OP(_i) ((ops[_i].flags & OPF_TAIL) \
+ || ((ops[_i].flags & (OPF_JMP|OPF_CJMP|OPF_RMD)) == OPF_JMP \
+ && ops[_i].op != OP_CALL))
+
+static int scan_for_pop(int i, int opcnt, const char *reg,
+ int magic, int depth, int *maxdepth, int do_flags)
+{
+ const struct parsed_proto *pp;
+ struct parsed_op *po;
+ int ret = 0;
+ int j;
+
+ for (; i < opcnt; i++) {
+ po = &ops[i];
+ if (po->cc_scratch == magic)
+ break; // already checked
+ po->cc_scratch = magic;
+
+ if (po->flags & OPF_TAIL) {
+ if (po->op == OP_CALL) {
+ pp = proto_parse(g_fhdr, po->operand[0].name, 0);
+ if (pp != NULL && pp->is_noreturn)
+ // no stack cleanup for noreturn
+ return ret;
+ }
+ return -1; // deadend
+ }
+
+ if ((po->flags & OPF_RMD)
+ || (po->op == OP_PUSH && po->p_argnum != 0)) // arg push
+ continue;
+
+ if ((po->flags & OPF_JMP) && po->op != OP_CALL) {
+ if (po->btj != NULL) {
+ // jumptable
+ for (j = 0; j < po->btj->count; j++) {
+ ret |= scan_for_pop(po->btj->d[j].bt_i, opcnt, reg, magic,
+ depth, maxdepth, do_flags);
+ if (ret < 0)
+ return ret; // dead end
+ }
+ return ret;
+ }
+
+ if (po->bt_i < 0) {
+ ferr(po, "dead branch\n");
+ return -1;
+ }
+
+ if (po->flags & OPF_CJMP) {
+ ret |= scan_for_pop(po->bt_i, opcnt, reg, magic,
+ depth, maxdepth, do_flags);
+ if (ret < 0)
+ return ret; // dead end
+ }
+ else {
+ i = po->bt_i - 1;
+ }
+ continue;
+ }
+
+ if ((po->op == OP_POP || po->op == OP_PUSH)
+ && po->operand[0].type == OPT_REG
+ && IS(po->operand[0].name, reg))
+ {
+ if (po->op == OP_PUSH && !(po->flags & OPF_FARG)) {
+ depth++;
+ if (depth > *maxdepth)
+ *maxdepth = depth;
+ if (do_flags)
+ op_set_clear_flag(po, OPF_RSAVE, OPF_RMD);
+ }
+ else if (po->op == OP_POP) {
+ if (depth == 0) {
+ if (do_flags)
+ op_set_clear_flag(po, OPF_RMD, OPF_RSAVE);
+ return 1;
+ }
+ else {
+ depth--;
+ if (depth < 0) // should not happen
+ ferr(po, "fail with depth\n");
+ if (do_flags)
+ op_set_clear_flag(po, OPF_RSAVE, OPF_RMD);
+ }
+ }
+ }
+ }
+
+ 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 flag_set)
+{
+ 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;
+ ops[j].flags |= flag_set;
+ break;
+ }
+
+ if (g_labels[j][0] != 0)
+ return -1;
+ }
+ }
+
+ return found ? 0 : -1;
+}
+
+static void scan_propagate_df(int i, int opcnt)
+{
+ struct parsed_op *po = &ops[i];
+ int j;
+
+ for (; i < opcnt; i++) {
+ po = &ops[i];
+ if (po->flags & OPF_DF)
+ return; // already resolved
+ po->flags |= OPF_DF;
+
+ if (po->op == OP_CALL)
+ ferr(po, "call with DF set?\n");
+
+ if (po->flags & OPF_JMP) {
+ if (po->btj != NULL) {
+ // jumptable
+ for (j = 0; j < po->btj->count; j++)
+ scan_propagate_df(po->btj->d[j].bt_i, opcnt);
+ return;
+ }
+
+ if (po->bt_i < 0) {
+ ferr(po, "dead branch\n");
+ return;
+ }
+
+ if (po->flags & OPF_CJMP)
+ scan_propagate_df(po->bt_i, opcnt);
+ else
+ i = po->bt_i - 1;
+ continue;
+ }
+
+ if (po->flags & OPF_TAIL)
+ break;
+
+ if (po->op == OP_CLD) {
+ po->flags |= OPF_RMD;
+ return;
+ }
+ }
+
+ ferr(po, "missing DF clear?\n");
+}
+
+// is operand 'opr' modified by parsed_op 'po'?
+static int is_opr_modified(const struct parsed_opr *opr,
+ const struct parsed_op *po)
+{
+ int mask;
+
+ if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA))
+ return 0;
+
+ if (opr->type == OPT_REG) {
+ if (po->op == OP_CALL) {
+ mask = (1 << xAX) | (1 << xCX) | (1 << xDX);
+ if ((1 << opr->reg) & mask)
+ return 1;
+ else
+ return 0;
+ }
+
+ if (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 c_mode)
+{
+ int mask;
+ int i;
+
+ if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA))
+ return 0;
+
+ if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST)
+ return 0;
+
+ if ((po_test->regmask_src | po_test->regmask_dst) & po->regmask_dst)
+ return 1;
+
+ // in reality, it can wreck any register, but in decompiled C
+ // version it can only overwrite eax or edx:eax
+ mask = (1 << xAX) | (1 << xDX);
+ if (!c_mode)
+ mask |= 1 << xCX;
+
+ if (po->op == OP_CALL
+ && ((po_test->regmask_src | po_test->regmask_dst) & mask))
+ 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,
+ int c_mode)
+{
+ if (po_test->operand_cnt == 1 && po_test->operand[0].type == OPT_CONST)
+ return -1;
+
+ for (; i < opcnt; i++) {
+ if (is_any_opr_modified(po_test, &ops[i], c_mode))
+ 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, int magic, int *branched,
+ int *setters, int *setter_cnt)
+{
+ struct label_ref *lr;
+ int ret;
+
+ while (i >= 0) {
+ if (ops[i].cc_scratch == magic) {
+ ferr(&ops[i], "%s looped\n", __func__);
+ return -1;
+ }
+ ops[i].cc_scratch = magic;
+
+ if (g_labels[i][0] != 0) {
+ *branched = 1;
+
+ lr = &g_label_refs[i];
+ for (; lr->next; lr = lr->next) {
+ ret = scan_for_flag_set(lr->i, magic,
+ branched, setters, setter_cnt);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (i > 0 && LAST_OP(i - 1)) {
+ i = lr->i;
+ continue;
+ }
+ ret = scan_for_flag_set(lr->i, magic,
+ branched, setters, setter_cnt);
+ if (ret < 0)
+ return ret;
+ }
+ i--;
+
+ if (ops[i].flags & OPF_FLAGS) {
+ setters[*setter_cnt] = i;
+ (*setter_cnt)++;
+ return 0;
+ }
+
+ if ((ops[i].flags & (OPF_JMP|OPF_CJMP)) == OPF_JMP)
+ return -1;
+ }
+
+ return -1;
+}
+
+// scan back for cdq, if anything modifies edx, fail
+static int scan_for_cdq_edx(int i)
+{
+ while (i >= 0) {
+ if (g_labels[i][0] != 0) {
+ if (g_label_refs[i].next != NULL)
+ return -1;
+ if (i > 0 && LAST_OP(i - 1)) {
+ i = g_label_refs[i].i;
+ continue;
+ }
+ return -1;
+ }
+ i--;
+
+ if (ops[i].op == OP_CDQ)
+ return i;
+
+ if (ops[i].regmask_dst & (1 << xDX))
+ return -1;
+ }
+
+ return -1;
+}
+
+static int scan_for_reg_clear(int i, int reg)
+{
+ while (i >= 0) {
+ if (g_labels[i][0] != 0) {
+ if (g_label_refs[i].next != NULL)
+ return -1;
+ if (i > 0 && LAST_OP(i - 1)) {
+ i = g_label_refs[i].i;
+ continue;
+ }
+ return -1;
+ }
+ i--;
+
+ if (ops[i].op == OP_XOR
+ && ops[i].operand[0].lmod == OPLM_DWORD
+ && ops[i].operand[0].reg == ops[i].operand[1].reg
+ && ops[i].operand[0].reg == reg)
+ return i;
+
+ if (ops[i].regmask_dst & (1 << reg))
+ return -1;
+ }
+
+ return -1;
+}
+
+// scan for positive, constant esp adjust
+static int scan_for_esp_adjust(int i, int opcnt, int *adj,
+ int *multipath)
+{
+ struct parsed_op *po;
+ int first_pop = -1;
+
+ *adj = *multipath = 0;
+
+ for (; i < opcnt; i++) {
+ po = &ops[i];
+
+ if (g_labels[i][0] != 0)
+ *multipath = 1;
+
+ if (po->op == OP_ADD && po->operand[0].reg == xSP) {
+ if (po->operand[1].type != OPT_CONST)
+ ferr(&ops[i], "non-const esp adjust?\n");
+ *adj += po->operand[1].val;
+ if (*adj & 3)
+ ferr(&ops[i], "unaligned esp adjust: %x\n", *adj);
+ return i;
+ }
+ else if (po->op == OP_PUSH && !(po->flags & OPF_RMD)) {
+ //if (first_pop == -1)
+ // first_pop = -2; // none
+ *adj -= lmod_bytes(po, po->operand[0].lmod);
+ }
+ else if (po->op == OP_POP && !(po->flags & OPF_RMD)) {
+ // seems like msvc only uses 'pop ecx' for stack realignment..
+ if (po->operand[0].type != OPT_REG || po->operand[0].reg != xCX)
+ break;
+ if (first_pop == -1 && *adj >= 0)
+ first_pop = i;
+ *adj += lmod_bytes(po, po->operand[0].lmod);
+ }
+ else if (po->flags & (OPF_JMP|OPF_TAIL)) {
+ if (po->op == OP_JMP && po->btj == NULL) {
+ i = po->bt_i - 1;
+ continue;
+ }
+ if (po->op != OP_CALL)
+ break;
+ if (po->operand[0].type != OPT_LABEL)
+ break;
+ if (po->pp != NULL && po->pp->is_stdcall)
+ break;
+ }
+ }
+
+ if (first_pop >= 0) {
+ // probably 'pop ecx' was used..
+ return first_pop;
+ }
+
+ return -1;
+}
+
+static void scan_fwd_set_flags(int i, int opcnt, int magic, int flags)
+{
+ struct parsed_op *po;
+ int j;
+
+ if (i < 0)
+ ferr(ops, "%s: followed bad branch?\n", __func__);
+
+ for (; i < opcnt; i++) {
+ po = &ops[i];
+ if (po->cc_scratch == magic)
+ return;
+ po->cc_scratch = magic;
+ po->flags |= flags;
+
+ if ((po->flags & OPF_JMP) && po->op != OP_CALL) {
+ if (po->btj != NULL) {
+ // jumptable
+ for (j = 0; j < po->btj->count; j++)
+ scan_fwd_set_flags(po->btj->d[j].bt_i, opcnt, magic, flags);
+ return;
+ }
+
+ scan_fwd_set_flags(po->bt_i, opcnt, magic, flags);
+ if (!(po->flags & OPF_CJMP))
+ return;
+ }
+ if (po->flags & OPF_TAIL)
+ return;
+ }
+}
+
+static const struct parsed_proto *try_recover_pp(
+ struct parsed_op *po, const struct parsed_opr *opr, int *search_instead)
+{
+ const struct parsed_proto *pp = NULL;
+ char buf[256];
+ char *p;
+
+ // maybe an arg of g_func?
+ if (opr->type == OPT_REGMEM && is_stack_access(po, opr))
+ {
+ char ofs_reg[16] = { 0, };
+ int arg, arg_s, arg_i;
+ int stack_ra = 0;
+ int offset = 0;
+
+ parse_stack_access(po, opr->name, ofs_reg,
+ &offset, &stack_ra, NULL, 0);
+ if (ofs_reg[0] != 0)
+ ferr(po, "offset reg on arg access?\n");
+ if (offset <= stack_ra) {
+ // search who set the stack var instead
+ if (search_instead != NULL)
+ *search_instead = 1;
+ return NULL;
+ }
+
+ arg_i = (offset - stack_ra - 4) / 4;
+ for (arg = arg_s = 0; arg < g_func_pp->argc; arg++) {
+ if (g_func_pp->arg[arg].reg != NULL)
+ continue;
+ if (arg_s == arg_i)
+ break;
+ arg_s++;
+ }
+ if (arg == g_func_pp->argc)
+ ferr(po, "stack arg %d not in prototype?\n", arg_i);
+
+ pp = g_func_pp->arg[arg].fptr;
+ if (pp == NULL)
+ ferr(po, "icall sa: arg%d is not a fptr?\n", arg + 1);
+ check_func_pp(po, pp, "icall arg");
+ }
+ else if (opr->type == OPT_REGMEM && strchr(opr->name + 1, '[')) {
+ // label[index]
+ p = strchr(opr->name + 1, '[');
+ memcpy(buf, opr->name, p - opr->name);
+ buf[p - opr->name] = 0;
+ pp = proto_parse(g_fhdr, buf, 0);
+ }
+ else if (opr->type == OPT_OFFSET || opr->type == OPT_LABEL) {
+ pp = proto_parse(g_fhdr, opr->name, 0);
+ if (pp == NULL)
+ ferr(po, "proto_parse failed for icall from '%s'\n", opr->name);
+ check_func_pp(po, pp, "reg-fptr ref");
+ }
+
+ return pp;
+}
+
+static void scan_for_call_type(int i, const struct parsed_opr *opr,
+ int magic, const struct parsed_proto **pp_found, int *multi)
+{
+ const struct parsed_proto *pp = NULL;
+ struct parsed_op *po;
+ struct label_ref *lr;
+
+ ops[i].cc_scratch = magic;
+
+ while (1) {
+ if (g_labels[i][0] != 0) {
+ lr = &g_label_refs[i];
+ for (; lr != NULL; lr = lr->next)
+ scan_for_call_type(lr->i, opr, magic, pp_found, multi);
+ if (i > 0 && LAST_OP(i - 1))
+ return;
+ }
+
+ i--;
+ if (i < 0)
+ break;
+
+ if (ops[i].cc_scratch == magic)
+ return;
+ ops[i].cc_scratch = magic;
+
+ if (!(ops[i].flags & OPF_DATA))
+ continue;
+ if (!is_opr_modified(opr, &ops[i]))
+ continue;
+ if (ops[i].op != OP_MOV && ops[i].op != OP_LEA) {
+ // most probably trashed by some processing
+ *pp_found = NULL;
+ return;
+ }
+
+ opr = &ops[i].operand[1];
+ if (opr->type != OPT_REG)
+ break;
+ }
+
+ po = (i >= 0) ? &ops[i] : ops;
+
+ if (i < 0) {
+ // reached the top - can only be an arg-reg
+ if (opr->type != OPT_REG)
+ return;
+
+ for (i = 0; i < g_func_pp->argc; i++) {
+ if (g_func_pp->arg[i].reg == NULL)
+ continue;
+ if (IS(opr->name, g_func_pp->arg[i].reg))
+ break;
+ }
+ if (i == g_func_pp->argc)
+ return;
+ pp = g_func_pp->arg[i].fptr;
+ if (pp == NULL)
+ ferr(po, "icall: arg%d (%s) is not a fptr?\n",
+ i + 1, g_func_pp->arg[i].reg);
+ check_func_pp(po, pp, "icall reg-arg");
+ }
+ else
+ pp = try_recover_pp(po, opr, NULL);
+
+ if (*pp_found != NULL && pp != NULL && *pp_found != pp) {
+ if (!IS((*pp_found)->ret_type.name, pp->ret_type.name)
+ || (*pp_found)->is_stdcall != pp->is_stdcall
+ || (*pp_found)->is_fptr != pp->is_fptr
+ || (*pp_found)->argc != pp->argc
+ || (*pp_found)->argc_reg != pp->argc_reg
+ || (*pp_found)->argc_stack != pp->argc_stack)
+ {
+ ferr(po, "icall: parsed_proto mismatch\n");
+ }
+ *multi = 1;
+ }
+ if (pp != NULL)
+ *pp_found = pp;
+}
+
+static const struct parsed_proto *resolve_icall(int i, int opcnt,
+ int *multi_src)
+{
+ const struct parsed_proto *pp = NULL;
+ int search_advice = 0;
+
+ *multi_src = 0;
+
+ 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,
+ multi_src);
+ break;
+ }
+
+ return pp;
+}
+
+// find an instruction that changed opr before i op
+// *op_i must be set to -1
+static int resolve_origin(int i, const struct parsed_opr *opr,
+ int magic, int *op_i)
+{
+ struct label_ref *lr;
+ int ret = 0;
+
+ ops[i].cc_scratch = magic;
+
+ while (1) {
+ if (g_labels[i][0] != 0) {
+ lr = &g_label_refs[i];
+ for (; lr != NULL; lr = lr->next)
+ ret |= resolve_origin(lr->i, opr, magic, op_i);
+ if (i > 0 && LAST_OP(i - 1))
+ return ret;
+ }
+
+ i--;
+ if (i < 0)
+ return -1;
+
+ if (ops[i].cc_scratch == magic)
+ return 0;
+ ops[i].cc_scratch = magic;
+
+ if (!(ops[i].flags & OPF_DATA))
+ continue;
+ if (!is_opr_modified(opr, &ops[i]))
+ continue;
+
+ if (*op_i >= 0) {
+ if (*op_i == i)
+ return 1;
+ // XXX: could check if the other op does the same
+ return -1;
+ }
+
+ *op_i = i;
+ return 1;
+ }
+}
+
+static int try_resolve_const(int i, const struct parsed_opr *opr,
+ int magic, unsigned int *val)
+{
+ int s_i = -1;
+ int ret = 0;
+
+ ret = resolve_origin(i, opr, magic, &s_i);
+ if (ret == 1) {
+ i = s_i;
+ if (ops[i].op != OP_MOV && ops[i].operand[1].type != OPT_CONST)
+ return -1;
+
+ *val = ops[i].operand[1].val;
+ return 1;
+ }
+
+ return -1;
+}
+
+static int collect_call_args_r(struct parsed_op *po, int i,
+ struct parsed_proto *pp, int *regmask, int *save_arg_vars, int arg,
+ int magic, int need_op_saving, int may_reuse)
+{
+ struct parsed_proto *pp_tmp;
+ struct label_ref *lr;
+ int need_to_save_current;
+ int save_args;
+ int ret = 0;
+ int reg;
+ char buf[32];
+ int j, k;
+
+ if (i < 0) {
+ ferr(po, "dead label encountered\n");
+ return -1;
+ }
+
+ for (; arg < pp->argc; arg++)
+ if (pp->arg[arg].reg == NULL)
+ break;
+ magic = (magic & 0xffffff) | (arg << 24);
+
+ for (j = i; j >= 0 && (arg < pp->argc || pp->is_unresolved); )
+ {
+ if (((ops[j].cc_scratch ^ magic) & 0xffffff) == 0) {
+ if (ops[j].cc_scratch != magic) {
+ ferr(&ops[j], "arg collect hit same path with diff args for %s\n",
+ pp->name);
+ return -1;
+ }
+ // ok: have already been here
+ return 0;
+ }
+ ops[j].cc_scratch = magic;
+
+ if (g_labels[j][0] != 0 && g_label_refs[j].i != -1) {
+ lr = &g_label_refs[j];
+ if (lr->next != NULL)
+ need_op_saving = 1;
+ for (; lr->next; lr = lr->next) {
+ if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP)
+ may_reuse = 1;
+ ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars,
+ arg, magic, need_op_saving, may_reuse);
+ if (ret < 0)
+ return ret;
+ }
+
+ if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP)
+ may_reuse = 1;
+ if (j > 0 && LAST_OP(j - 1)) {
+ // follow last branch in reverse
+ j = lr->i;
+ continue;
+ }
+ need_op_saving = 1;
+ ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars,
+ arg, magic, need_op_saving, may_reuse);
+ if (ret < 0)
+ return ret;
+ }
+ j--;
+
+ if (ops[j].op == OP_CALL)
+ {
+ if (pp->is_unresolved)
+ break;
+
+ pp_tmp = ops[j].pp;
+ if (pp_tmp == NULL)
+ ferr(po, "arg collect hit unparsed call '%s'\n",
+ ops[j].operand[0].name);
+ if (may_reuse && pp_tmp->argc_stack > 0)
+ ferr(po, "arg collect %d/%d hit '%s' with %d stack args\n",
+ arg, pp->argc, opr_name(&ops[j], 0), pp_tmp->argc_stack);
+ }
+ // esp adjust of 0 means we collected it before
+ else if (ops[j].op == OP_ADD && ops[j].operand[0].reg == xSP
+ && (ops[j].operand[1].type != OPT_CONST
+ || ops[j].operand[1].val != 0))
+ {
+ if (pp->is_unresolved)
+ break;
+
+ ferr(po, "arg collect %d/%d hit esp adjust of %d\n",
+ arg, pp->argc, ops[j].operand[1].val);
+ }
+ else if (ops[j].op == OP_POP) {
+ if (pp->is_unresolved)
+ break;
+
+ ferr(po, "arg collect %d/%d hit pop\n", arg, pp->argc);
+ }
+ else if (ops[j].flags & OPF_CJMP)
+ {
+ if (pp->is_unresolved)
+ break;
+
+ may_reuse = 1;
+ }
+ else if (ops[j].op == OP_PUSH && !(ops[j].flags & OPF_FARG))
+ {
+ if (pp->is_unresolved && (ops[j].flags & OPF_RMD))
+ break;
+
+ pp->arg[arg].datap = &ops[j];
+ need_to_save_current = 0;
+ save_args = 0;
+ reg = -1;
+ if (ops[j].operand[0].type == OPT_REG)
+ reg = ops[j].operand[0].reg;
+
+ if (!need_op_saving) {
+ ret = scan_for_mod(&ops[j], j + 1, i, 1);
+ need_to_save_current = (ret >= 0);
+ }
+ if (need_op_saving || need_to_save_current) {
+ // mark this push as one that needs operand saving
+ ops[j].flags &= ~OPF_RMD;
+ if (ops[j].p_argnum == 0) {
+ ops[j].p_argnum = arg + 1;
+ save_args |= 1 << arg;
+ }
+ else if (ops[j].p_argnum < arg + 1) {
+ // XXX: might kill valid var..
+ //*save_arg_vars &= ~(1 << (ops[j].p_argnum - 1));
+ ops[j].p_argnum = arg + 1;
+ save_args |= 1 << arg;
+ }
+ }
+ else if (ops[j].p_argnum == 0)
+ ops[j].flags |= OPF_RMD;
+
+ // some PUSHes are reused by different calls on other branches,
+ // but that can't happen if we didn't branch, so they
+ // can be removed from future searches (handles nested calls)
+ if (!may_reuse)
+ ops[j].flags |= OPF_FARG;
+
+ ops[j].flags &= ~OPF_RSAVE;
+
+ // check for __VALIST
+ if (!pp->is_unresolved && pp->arg[arg].type.is_va_list) {
+ k = -1;
+ ret = resolve_origin(j, &ops[j].operand[0], magic + 1, &k);
+ if (ret == 1 && k >= 0)
+ {
+ if (ops[k].op == OP_LEA) {
+ snprintf(buf, sizeof(buf), "arg_%X",
+ g_func_pp->argc_stack * 4);
+ if (!g_func_pp->is_vararg
+ || strstr(ops[k].operand[1].name, buf))
+ {
+ ops[k].flags |= OPF_RMD;
+ ops[j].flags |= OPF_RMD | OPF_VAPUSH;
+ save_args &= ~(1 << arg);
+ reg = -1;
+ }
+ else
+ ferr(&ops[j], "lea va_list used, but no vararg?\n");
+ }
+ // check for va_list from g_func_pp arg too
+ else if (ops[k].op == OP_MOV
+ && is_stack_access(&ops[k], &ops[k].operand[1]))
+ {
+ ret = stack_frame_access(&ops[k], &ops[k].operand[1],
+ buf, sizeof(buf), ops[k].operand[1].name, "", 1, 0);
+ if (ret >= 0) {
+ ops[k].flags |= OPF_RMD;
+ ops[j].flags |= OPF_RMD;
+ ops[j].p_argpass = ret + 1;
+ save_args &= ~(1 << arg);
+ reg = -1;
+ }
+ }
+ }
+ }
+
+ *save_arg_vars |= save_args;
+
+ // tracking reg usage
+ if (reg >= 0)
+ *regmask |= 1 << reg;
+
+ arg++;
+ if (!pp->is_unresolved) {
+ // next arg
+ for (; arg < pp->argc; arg++)
+ if (pp->arg[arg].reg == NULL)
+ break;
+ }
+ magic = (magic & 0xffffff) | (arg << 24);
+ }
+ }
+
+ if (arg < pp->argc) {
+ ferr(po, "arg collect failed for '%s': %d/%d\n",
+ pp->name, arg, pp->argc);
+ return -1;
+ }
+
+ return arg;
+}
+
+static int collect_call_args(struct parsed_op *po, int i,
+ struct parsed_proto *pp, int *regmask, int *save_arg_vars,
+ int magic)
+{
+ int ret;
+ int a;
+
+ ret = collect_call_args_r(po, i, pp, regmask, save_arg_vars,
+ 0, magic, 0, 0);
+ if (ret < 0)
+ return ret;
+
+ if (pp->is_unresolved) {
+ pp->argc += ret;
+ pp->argc_stack += ret;
+ for (a = 0; a < pp->argc; a++)
+ if (pp->arg[a].type.name == NULL)
+ pp->arg[a].type.name = strdup("int");
+ }
+
+ return ret;
+}
+
+// early check for tail call or branch back
+static int is_like_tailjmp(int j)
+{
+ if (!(ops[j].flags & OPF_JMP))
+ return 0;
+
+ if (ops[j].op == OP_JMP && !ops[j].operand[0].had_ds)
+ // probably local branch back..
+ return 1;
+ if (ops[j].op == OP_CALL)
+ // probably noreturn call..
+ return 1;
+
+ return 0;
+}
+
+static void pp_insert_reg_arg(struct parsed_proto *pp, const char *reg)
+{
+ int i;
+
+ for (i = 0; i < pp->argc; i++)
+ if (pp->arg[i].reg == NULL)
+ break;
+
+ if (pp->argc_stack)
+ memmove(&pp->arg[i + 1], &pp->arg[i],
+ sizeof(pp->arg[0]) * pp->argc_stack);
+ memset(&pp->arg[i], 0, sizeof(pp->arg[i]));
+ pp->arg[i].reg = strdup(reg);
+ pp->arg[i].type.name = strdup("int");
+ pp->argc++;
+ pp->argc_reg++;
+}
+
+static void add_label_ref(struct label_ref *lr, int op_i)
+{
+ struct label_ref *lr_new;
+
+ if (lr->i == -1) {
+ lr->i = op_i;
+ return;
+ }
+
+ lr_new = calloc(1, sizeof(*lr_new));
+ lr_new->i = op_i;
+ lr_new->next = lr->next;
+ lr->next = lr_new;
+}
+
+static void output_std_flags(FILE *fout, struct parsed_op *po,
+ int *pfomask, const char *dst_opr_text)
+{
+ if (*pfomask & (1 << PFO_Z)) {
+ fprintf(fout, "\n cond_z = (%s%s == 0);",
+ lmod_cast_u(po, po->operand[0].lmod), dst_opr_text);
+ *pfomask &= ~(1 << PFO_Z);
+ }
+ if (*pfomask & (1 << PFO_S)) {
+ fprintf(fout, "\n cond_s = (%s%s < 0);",
+ lmod_cast_s(po, po->operand[0].lmod), dst_opr_text);
+ *pfomask &= ~(1 << PFO_S);
+ }
+}
+
+static void output_pp_attrs(FILE *fout, const struct parsed_proto *pp,
+ int is_noreturn)
+{
+ if (pp->is_fastcall)
+ fprintf(fout, "__fastcall ");
+ else if (pp->is_stdcall && pp->argc_reg == 0)
+ fprintf(fout, "__stdcall ");
+ if (pp->is_noreturn || is_noreturn)
+ fprintf(fout, "noreturn ");
+}
+
+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], cast[64];
+ const struct parsed_proto *pp_c;
+ struct parsed_proto *pp, *pp_tmp;
+ struct parsed_data *pd;
+ const char *tmpname;
+ unsigned int uval;
+ int save_arg_vars = 0;
+ int cond_vars = 0;
+ int need_tmp_var = 0;
+ int need_tmp64 = 0;
+ int had_decl = 0;
+ int label_pending = 0;
+ int regmask_save = 0;
+ int regmask_arg = 0;
+ int regmask_now = 0;
+ int regmask_init = 0;
+ int regmask = 0;
+ int pfomask = 0;
+ int found = 0;
+ int depth = 0;
+ int no_output;
+ int i, j, l;
+ int arg;
+ int reg;
+ int ret;
+
+ g_bp_frame = g_sp_frame = g_stack_fsz = 0;
+ g_stack_frame_used = 0;
+
+ g_func_pp = proto_parse(fhdr, funcn, 0);
+ if (g_func_pp == NULL)
+ ferr(ops, "proto_parse failed for '%s'\n", funcn);
+
+ 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;
+ }
+ }
+
+ // pass1:
+ // - handle ebp/esp 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;
+ i = 2;
+
+ if (ops[2].op == OP_SUB && IS(opr_name(&ops[2], 0), "esp")) {
+ g_stack_fsz = opr_const(&ops[2], 1);
+ ops[2].flags |= OPF_RMD;
+ i++;
+ }
+ else {
+ // another way msvc builds stack frame..
+ i = 2;
+ while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) {
+ g_stack_fsz += 4;
+ ops[i].flags |= OPF_RMD;
+ ecx_push++;
+ i++;
+ }
+ // and another way..
+ if (i == 2 && ops[i].op == OP_MOV && ops[i].operand[0].reg == xAX
+ && ops[i].operand[1].type == OPT_CONST
+ && ops[i + 1].op == OP_CALL
+ && IS(opr_name(&ops[i + 1], 0), "__alloca_probe"))
+ {
+ g_stack_fsz += ops[i].operand[1].val;
+ ops[i].flags |= OPF_RMD;
+ i++;
+ ops[i].flags |= OPF_RMD;
+ i++;
+ }
+ }
+
+ found = 0;
+ do {
+ for (; i < opcnt; i++)
+ if (ops[i].op == OP_RET)
+ break;
+ j = i - 1;
+ if (i == opcnt && (ops[j].flags & OPF_JMP)) {
+ if (found && is_like_tailjmp(j))
+ break;
+ j--;
+ }
+
+ if ((ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ebp"))
+ || ops[j].op == OP_LEAVE)
+ {
+ ops[j].flags |= OPF_RMD;
+ }
+ else if (!(g_ida_func_attr & IDAFA_NORETURN))
+ ferr(&ops[j], "'pop ebp' expected\n");
+
+ if (g_stack_fsz != 0) {
+ if (ops[j - 1].op == OP_MOV
+ && IS(opr_name(&ops[j - 1], 0), "esp")
+ && IS(opr_name(&ops[j - 1], 1), "ebp"))
+ {
+ ops[j - 1].flags |= OPF_RMD;
+ }
+ else if (ops[j].op != OP_LEAVE
+ && !(g_ida_func_attr & IDAFA_NORETURN))
+ {
+ ferr(&ops[j - 1], "esp restore expected\n");
+ }
+
+ if (ecx_push && ops[j - 2].op == OP_POP
+ && IS(opr_name(&ops[j - 2], 0), "ecx"))
+ {
+ ferr(&ops[j - 2], "unexpected ecx pop\n");
+ }
+ }
+
+ found = 1;
+ i++;
+ } while (i < opcnt);
+ }
+ else {
+ int ecx_push = 0, esp_sub = 0;
+
+ i = 0;
+ while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) {
+ ops[i].flags |= OPF_RMD;
+ g_stack_fsz += 4;
+ ecx_push++;
+ i++;
+ }
+
+ for (; i < opcnt; i++) {
+ if (ops[i].op == OP_PUSH || (ops[i].flags & (OPF_JMP|OPF_TAIL)))
+ break;
+ if (ops[i].op == OP_SUB && ops[i].operand[0].reg == xSP
+ && ops[i].operand[1].type == OPT_CONST)
+ {
+ g_stack_fsz = ops[i].operand[1].val;
+ ops[i].flags |= OPF_RMD;
+ esp_sub = 1;
+ break;
+ }
+ }
+
+ found = 0;
+ if (ecx_push || esp_sub)
+ {
+ g_sp_frame = 1;
+
+ i++;
+ do {
+ for (; i < opcnt; i++)
+ if (ops[i].op == OP_RET)
+ break;
+ j = i - 1;
+ if (i == opcnt && (ops[j].flags & OPF_JMP)) {
+ if (found && is_like_tailjmp(j))
+ break;
+ j--;
+ }
+
+ if (ecx_push > 0) {
+ for (l = 0; l < ecx_push; l++) {
+ if (ops[j].op != OP_POP
+ || !IS(opr_name(&ops[j], 0), "ecx"))
+ {
+ ferr(&ops[j], "'pop ecx' expected\n");
+ }
+ ops[j].flags |= OPF_RMD;
+ j--;
+ }
+
+ found = 1;
+ }
+
+ if (esp_sub) {
+ if (ops[j].op != OP_ADD
+ || !IS(opr_name(&ops[j], 0), "esp")
+ || ops[j].operand[1].type != OPT_CONST
+ || ops[j].operand[1].val != g_stack_fsz)
+ ferr(&ops[j], "'add esp' expected\n");
+ ops[j].flags |= OPF_RMD;
+
+ found = 1;
+ }
+
+ i++;
+ } while (i < opcnt);
+ }
+ }
+
+ // pass2:
+ // - parse calls with labels
+ // - resolve all branches
+ for (i = 0; i < opcnt; i++)
+ {
+ po = &ops[i];
+ po->bt_i = -1;
+ po->btj = NULL;
+
+ if (po->flags & OPF_RMD)
+ continue;
+
+ if (po->op == OP_CALL) {
+ pp = NULL;
+
+ if (po->operand[0].type == OPT_LABEL) {
+ tmpname = opr_name(po, 0);
+ if (IS_START(tmpname, "loc_"))
+ ferr(po, "call to loc_*\n");
+ pp_c = proto_parse(fhdr, tmpname, 0);
+ if (pp_c == NULL)
+ ferr(po, "proto_parse failed for call '%s'\n", tmpname);
+
+ pp = proto_clone(pp_c);
+ 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)
+ check_func_pp(po, pp, "fptr var call");
+ if (pp->is_noreturn)
+ po->flags |= OPF_TAIL;
+ }
+ po->pp = pp;
+ continue;
+ }
+
+ if (!(po->flags & OPF_JMP) || po->op == OP_RET)
+ continue;
+
+ if (po->operand[0].type == OPT_REGMEM) {
+ char *p = strchr(po->operand[0].name, '[');
+ if (p == NULL)
+ goto tailcall;
+ ret = p - po->operand[0].name;
+ strncpy(buf1, po->operand[0].name, ret);
+ buf1[ret] = 0;
+
+ for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) {
+ if (IS(g_func_pd[j].label, buf1)) {
+ pd = &g_func_pd[j];
+ break;
+ }
+ }
+ if (pd == NULL)
+ //ferr(po, "label '%s' not parsed?\n", buf1);
+ goto tailcall;
+ if (pd->type != OPT_OFFSET)
+ ferr(po, "label '%s' with non-offset data?\n", buf1);
+
+ // find all labels, link
+ for (j = 0; j < pd->count; j++) {
+ for (l = 0; l < opcnt; l++) {
+ if (g_labels[l][0] && IS(g_labels[l], pd->d[j].u.label)) {
+ add_label_ref(&g_label_refs[l], i);
+ pd->d[j].bt_i = l;
+ break;
+ }
+ }
+ }
+
+ po->btj = pd;
+ continue;
+ }
+
+ for (l = 0; l < opcnt; l++) {
+ if (g_labels[l][0] && IS(po->operand[0].name, g_labels[l])) {
+ if (l == i + 1 && po->op == OP_JMP) {
+ // yet another alignment type..
+ po->flags |= OPF_RMD;
+ break;
+ }
+ add_label_ref(&g_label_refs[l], i);
+ po->bt_i = l;
+ break;
+ }
+ }
+
+ if (po->bt_i != -1 || (po->flags & OPF_RMD))
+ continue;
+
+ if (po->operand[0].type == OPT_LABEL)
+ // assume tail call
+ goto tailcall;
+
+ ferr(po, "unhandled branch\n");
+
+tailcall:
+ po->op = OP_CALL;
+ po->flags |= OPF_TAIL;
+ if (i > 0 && ops[i - 1].op == OP_POP)
+ po->flags |= OPF_ATAIL;
+ i--; // reprocess
+ }
+
+ // pass3:
+ // - remove dead labels
+ // - process calls
+ for (i = 0; i < opcnt; i++)
+ {
+ if (g_labels[i][0] != 0 && g_label_refs[i].i == -1)
+ g_labels[i][0] = 0;
+
+ po = &ops[i];
+ if (po->flags & OPF_RMD)
+ continue;
+
+ if (po->op == OP_CALL)
+ {
+ tmpname = opr_name(po, 0);
+ pp = po->pp;
+ if (pp == NULL)
+ {
+ // indirect call
+ pp_c = resolve_icall(i, opcnt, &l);
+ if (pp_c != NULL) {
+ if (!pp_c->is_func && !pp_c->is_fptr)
+ ferr(po, "call to non-func: %s\n", pp_c->name);
+ pp = proto_clone(pp_c);
+ my_assert_not(pp, NULL);
+ if (l)
+ // not resolved just to single func
+ pp->is_fptr = 1;
+
+ switch (po->operand[0].type) {
+ case OPT_REG:
+ // we resolved this call and no longer need the register
+ po->regmask_src &= ~(1 << po->operand[0].reg);
+ break;
+ case OPT_REGMEM:
+ pp->is_fptr = 1;
+ break;
+ default:
+ break;
+ }
+ }
+ if (pp == NULL) {
+ pp = calloc(1, sizeof(*pp));
+ my_assert_not(pp, NULL);
+ pp->is_fptr = 1;
+ ret = scan_for_esp_adjust(i + 1, opcnt, &j, &l);
+ if (ret < 0) {
+ if (!g_allow_regfunc)
+ ferr(po, "non-__cdecl indirect call unhandled yet\n");
+ pp->is_unresolved = 1;
+ j = 0;
+ }
+ j /= 4;
+ if (j > ARRAY_SIZE(pp->arg))
+ ferr(po, "esp adjust too large: %d\n", j);
+ pp->ret_type.name = strdup("int");
+ pp->argc = pp->argc_stack = j;
+ for (arg = 0; arg < pp->argc; arg++)
+ pp->arg[arg].type.name = strdup("int");
+ }
+ po->pp = pp;
+ }
+
+ // look for and make use of esp adjust
+ ret = -1;
+ if (!pp->is_stdcall && pp->argc_stack > 0)
+ ret = scan_for_esp_adjust(i + 1, opcnt, &j, &l);
+ if (ret >= 0) {
+ if (pp->is_vararg) {
+ if (j / 4 < pp->argc_stack)
+ ferr(po, "esp adjust is too small: %x < %x\n",
+ j, pp->argc_stack * 4);
+ // modify pp to make it have varargs as normal args
+ arg = pp->argc;
+ pp->argc += j / 4 - pp->argc_stack;
+ for (; arg < pp->argc; arg++) {
+ pp->arg[arg].type.name = strdup("int");
+ pp->argc_stack++;
+ }
+ if (pp->argc > ARRAY_SIZE(pp->arg))
+ ferr(po, "too many args for '%s'\n", tmpname);
+ }
+ if (pp->argc_stack != j / 4)
+ ferr(po, "stack tracking failed for '%s': %x %x\n",
+ tmpname, pp->argc_stack * 4, j);
+
+ ops[ret].flags |= OPF_RMD;
+ if (ops[ret].op == OP_POP && j > 4) {
+ // deal with multi-pop stack adjust
+ j = pp->argc_stack;
+ while (ops[ret].op == OP_POP && j > 0 && ret < opcnt) {
+ ops[ret].flags |= OPF_RMD;
+ j--;
+ ret++;
+ }
+ }
+ else if (!l) {
+ // a bit of a hack, but deals with use of
+ // single adj for multiple calls
+ ops[ret].operand[1].val -= j;
+ }
+ }
+ else if (pp->is_vararg)
+ ferr(po, "missing esp_adjust for vararg func '%s'\n",
+ pp->name);
+
+ if (!pp->is_unresolved && !(po->flags & OPF_ATAIL)) {
+ // since we know the args, collect them
+ collect_call_args(po, i, pp, ®mask, &save_arg_vars,
+ i + opcnt * 2);
+ }
+
+ if (strstr(pp->ret_type.name, "int64"))
+ need_tmp64 = 1;
+ }
+ }
+
+ // pass4:
+ // - find POPs for PUSHes, rm both
+ // - scan for STD/CLD, propagate DF
+ // - scan for all used registers
+ // - find flag set ops for their users
+ // - do unreselved calls
+ // - declare indirect functions
+ for (i = 0; i < opcnt; i++) {
+ po = &ops[i];
+ if (po->flags & OPF_RMD)
+ continue;
+
+ if (po->op == OP_PUSH && (po->flags & OPF_RSAVE)) {
+ reg = po->operand[0].reg;
+ if (!(regmask & (1 << reg)))
+ // not a reg save after all, rerun scan_for_pop
+ po->flags &= ~OPF_RSAVE;
+ else
+ regmask_save |= 1 << reg;
+ }
+
+ if (po->op == OP_PUSH && po->p_argnum == 0
+ && !(po->flags & OPF_RSAVE) && !g_func_pp->is_userstack)
+ {
+ if (po->operand[0].type == OPT_REG)
+ {
+ reg = po->operand[0].reg;
+ if (reg < 0)
+ ferr(po, "reg not set for push?\n");
+
+ depth = 0;
+ ret = scan_for_pop(i + 1, opcnt,
+ po->operand[0].name, i + opcnt * 3, 0, &depth, 0);
+ if (ret == 1) {
+ if (depth > 1)
+ ferr(po, "too much depth: %d\n", depth);
+
+ po->flags |= OPF_RMD;
+ scan_for_pop(i + 1, opcnt, po->operand[0].name,
+ i + opcnt * 4, 0, &depth, 1);
+ continue;
+ }
+ ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, 0);
+ if (ret == 0) {
+ arg = OPF_RMD;
+ if (regmask & (1 << reg)) {
+ if (regmask_save & (1 << reg))
+ ferr(po, "%s already saved?\n", po->operand[0].name);
+ arg = OPF_RSAVE;
+ }
+ po->flags |= arg;
+ scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, arg);
+ continue;
+ }
+ }
+ else if (po->operand[0].type == OPT_CONST) {
+ for (j = i + 1; j < opcnt; j++) {
+ if ((ops[j].flags & (OPF_JMP|OPF_TAIL|OPF_RSAVE))
+ || ops[j].op == OP_PUSH || g_labels[i][0] != 0)
+ {
+ break;
+ }
+
+ if (!(ops[j].flags & OPF_RMD) && ops[j].op == OP_POP)
+ {
+ po->flags |= OPF_RMD;
+ ops[j].datap = po;
+ break;
+ }
+ }
+ }
+ }
+
+ if (po->op == OP_STD) {
+ po->flags |= OPF_DF | OPF_RMD;
+ scan_propagate_df(i + 1, opcnt);
+ }
+
+ regmask_now = po->regmask_src | po->regmask_dst;
+ if (regmask_now & (1 << xBP)) {
+ if (g_bp_frame && !(po->flags & OPF_EBP_S)) {
+ if (po->regmask_dst & (1 << xBP))
+ // compiler decided to drop bp frame and use ebp as scratch
+ scan_fwd_set_flags(i + 1, opcnt, i + opcnt * 5, OPF_EBP_S);
+ else
+ regmask_now &= ~(1 << xBP);
+ }
+ }
+
+ regmask |= regmask_now;
+
+ if (po->flags & OPF_CC)
+ {
+ int setters[16], cnt = 0, branched = 0;
+
+ ret = scan_for_flag_set(i, i + opcnt * 6,
+ &branched, setters, &cnt);
+ if (ret < 0 || cnt <= 0)
+ ferr(po, "unable to trace flag setter(s)\n");
+ if (cnt > ARRAY_SIZE(setters))
+ ferr(po, "too many flag setters\n");
+
+ for (j = 0; j < cnt; j++)
+ {
+ tmp_op = &ops[setters[j]]; // flag setter
+ 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 arith op, or branch, make it calculate flags explicitly
+ if (tmp_op->op == OP_TEST || tmp_op->op == OP_CMP)
+ {
+ if (branched || scan_for_mod(tmp_op, setters[j] + 1, i, 0) >= 0)
+ pfomask = 1 << po->pfo;
+ }
+ else if (tmp_op->op == OP_CMPS || tmp_op->op == OP_SCAS) {
+ pfomask = 1 << po->pfo;
+ }
+ else {
+ // see if we'll be able to handle based on op result
+ if ((tmp_op->op != OP_AND && tmp_op->op != OP_OR
+ && po->pfo != PFO_Z && po->pfo != PFO_S
+ && po->pfo != PFO_P)
+ || branched
+ || scan_for_mod_opr0(tmp_op, setters[j] + 1, i) >= 0)
+ {
+ pfomask = 1 << po->pfo;
+ }
+
+ if (tmp_op->op == OP_ADD && po->pfo == PFO_C) {
+ propagate_lmod(tmp_op, &tmp_op->operand[0],
+ &tmp_op->operand[1]);
+ if (tmp_op->operand[0].lmod == OPLM_DWORD)
+ need_tmp64 = 1;
+ }
+ }
+ if (pfomask) {
+ tmp_op->pfomask |= pfomask;
+ cond_vars |= pfomask;
+ }
+ // note: may overwrite, currently not a problem
+ po->datap = tmp_op;
+ }
+
+ if (po->op == OP_RCL || po->op == OP_RCR
+ || po->op == OP_ADC || po->op == OP_SBB)
+ cond_vars |= 1 << PFO_C;
+ }
+
+ if (po->op == OP_CMPS || po->op == OP_SCAS) {
+ cond_vars |= 1 << PFO_Z;
+ }
+ else if (po->op == OP_MUL
+ || (po->op == OP_IMUL && po->operand_cnt == 1))
+ {
+ if (po->operand[0].lmod == OPLM_DWORD)
+ need_tmp64 = 1;
+ }
+ else if (po->op == OP_CALL) {
+ pp = po->pp;
+ if (pp == NULL)
+ ferr(po, "NULL pp\n");
+
+ if (pp->is_unresolved) {
+ int regmask_stack = 0;
+ collect_call_args(po, i, pp, ®mask, &save_arg_vars,
+ i + opcnt * 2);
+
+ // this is pretty rough guess:
+ // see ecx and edx were pushed (and not their saved versions)
+ for (arg = 0; arg < pp->argc; arg++) {
+ if (pp->arg[arg].reg != NULL)
+ continue;
+
+ tmp_op = pp->arg[arg].datap;
+ if (tmp_op == NULL)
+ ferr(po, "parsed_op missing for arg%d\n", arg);
+ if (tmp_op->p_argnum == 0 && tmp_op->operand[0].type == OPT_REG)
+ regmask_stack |= 1 << tmp_op->operand[0].reg;
+ }
+
+ if (!((regmask_stack & (1 << xCX))
+ && (regmask_stack & (1 << xDX))))
+ {
+ if (pp->argc_stack != 0
+ || ((regmask | regmask_arg) & ((1 << xCX)|(1 << xDX))))
+ {
+ pp_insert_reg_arg(pp, "ecx");
+ pp->is_fastcall = 1;
+ regmask_init |= 1 << xCX;
+ regmask |= 1 << xCX;
+ }
+ if (pp->argc_stack != 0
+ || ((regmask | regmask_arg) & (1 << xDX)))
+ {
+ pp_insert_reg_arg(pp, "edx");
+ regmask_init |= 1 << xDX;
+ regmask |= 1 << xDX;
+ }
+ }
+
+ // note: __cdecl doesn't fall into is_unresolved category
+ if (pp->argc_stack > 0)
+ pp->is_stdcall = 1;
+ }
+
+ for (arg = 0; arg < pp->argc; arg++) {
+ if (pp->arg[arg].reg != NULL) {
+ reg = char_array_i(regs_r32,
+ ARRAY_SIZE(regs_r32), pp->arg[arg].reg);
+ if (reg < 0)
+ ferr(ops, "arg '%s' is not a reg?\n", pp->arg[arg].reg);
+ if (!(regmask & (1 << reg))) {
+ regmask_init |= 1 << reg;
+ regmask |= 1 << reg;
+ }
+ }
+ }
+ }
+ else if (po->op == OP_MOV && po->operand[0].pp != NULL
+ && po->operand[1].pp != NULL)
+ {
+ // <var> = offset <something>
+ if ((po->operand[1].pp->is_func || po->operand[1].pp->is_fptr)
+ && !IS_START(po->operand[1].name, "off_"))
+ {
+ if (!po->operand[0].pp->is_fptr)
+ ferr(po, "%s not declared as fptr when it should be\n",
+ po->operand[0].name);
+ if (pp_cmp_func(po->operand[0].pp, po->operand[1].pp)) {
+ pp_print(buf1, sizeof(buf1), po->operand[0].pp);
+ pp_print(buf2, sizeof(buf2), po->operand[1].pp);
+ fnote(po, "var: %s\n", buf1);
+ fnote(po, "func: %s\n", buf2);
+ ferr(po, "^ mismatch\n");
+ }
+ }
+ }
+ else if (po->op == OP_RET && !IS(g_func_pp->ret_type.name, "void"))
+ regmask |= 1 << xAX;
+ else if (po->op == OP_DIV || po->op == OP_IDIV) {
+ // 32bit division is common, look for it
+ if (po->op == OP_DIV)
+ ret = scan_for_reg_clear(i, xDX);
+ else
+ ret = scan_for_cdq_edx(i);
+ if (ret >= 0)
+ po->flags |= OPF_32BIT;
+ else
+ need_tmp64 = 1;
+ }
+ else if (po->op == OP_CLD)
+ po->flags |= OPF_RMD;
+
+ if (po->op == OP_RCL || po->op == OP_RCR || po->op == OP_XCHG) {
+ need_tmp_var = 1;
+ }
+ }
+
+ // pass4:
+ // - confirm regmask_save, it might have been reduced
+ if (regmask_save != 0)
+ {
+ regmask_save = 0;
+ for (i = 0; i < opcnt; i++) {
+ po = &ops[i];
+ if (po->flags & OPF_RMD)
+ continue;
+
+ if (po->op == OP_PUSH && (po->flags & OPF_RSAVE))
+ regmask_save |= 1 << po->operand[0].reg;
+ }
+ }
+
+ // output starts here
+
+ // define userstack size
+ if (g_func_pp->is_userstack) {
+ fprintf(fout, "#ifndef US_SZ_%s\n", g_func_pp->name);
+ fprintf(fout, "#define US_SZ_%s USERSTACK_SIZE\n", g_func_pp->name);
+ fprintf(fout, "#endif\n");
+ }
+
+ // the function itself
+ fprintf(fout, "%s ", g_func_pp->ret_type.name);
+ output_pp_attrs(fout, g_func_pp, g_ida_func_attr & IDAFA_NORETURN);
+ fprintf(fout, "%s(", g_func_pp->name);
+
+ for (i = 0; i < g_func_pp->argc; i++) {
+ if (i > 0)
+ fprintf(fout, ", ");
+ if (g_func_pp->arg[i].fptr != NULL) {
+ // func pointer..
+ pp = g_func_pp->arg[i].fptr;
+ fprintf(fout, "%s (", pp->ret_type.name);
+ output_pp_attrs(fout, pp, 0);
+ fprintf(fout, "*a%d)(", i + 1);
+ for (j = 0; j < pp->argc; j++) {
+ if (j > 0)
+ fprintf(fout, ", ");
+ if (pp->arg[j].fptr)
+ ferr(ops, "nested fptr\n");
+ fprintf(fout, "%s", pp->arg[j].type.name);
+ }
+ if (pp->is_vararg) {
+ if (j > 0)
+ fprintf(fout, ", ");
+ fprintf(fout, "...");
+ }
+ fprintf(fout, ")");
+ }
+ else if (g_func_pp->arg[i].type.is_retreg) {
+ fprintf(fout, "u32 *r_%s", g_func_pp->arg[i].reg);
+ }
+ else {
+ fprintf(fout, "%s a%d", g_func_pp->arg[i].type.name, i + 1);
+ }
+ }
+ if (g_func_pp->is_vararg) {
+ if (i > 0)
+ fprintf(fout, ", ");
+ fprintf(fout, "...");
+ }
+
+ fprintf(fout, ")\n{\n");
+
+ // declare indirect functions
+ for (i = 0; i < opcnt; i++) {
+ po = &ops[i];
+ if (po->flags & OPF_RMD)
+ continue;
+
+ if (po->op == OP_CALL) {
+ pp = po->pp;
+ if (pp == NULL)
+ ferr(po, "NULL pp\n");
+
+ if (pp->is_fptr && !(pp->name[0] != 0 && pp->is_arg)) {
+ if (pp->name[0] != 0) {
+ memmove(pp->name + 2, pp->name, strlen(pp->name) + 1);
+ memcpy(pp->name, "i_", 2);
+
+ // might be declared already
+ found = 0;
+ for (j = 0; j < i; j++) {
+ if (ops[j].op == OP_CALL && (pp_tmp = ops[j].pp)) {
+ if (pp_tmp->is_fptr && IS(pp->name, pp_tmp->name)) {
+ found = 1;
+ break;
+ }
+ }
+ }
+ if (found)
+ continue;
+ }
+ else
+ snprintf(pp->name, sizeof(pp->name), "icall%d", i);
+
+ fprintf(fout, " %s (", pp->ret_type.name);
+ output_pp_attrs(fout, pp, 0);
+ fprintf(fout, "*%s)(", pp->name);
+ for (j = 0; j < pp->argc; j++) {
+ if (j > 0)
+ fprintf(fout, ", ");
+ fprintf(fout, "%s a%d", pp->arg[j].type.name, j + 1);
+ }
+ fprintf(fout, ");\n");
+ }
+ }
+ }
+
+ // output LUTs/jumptables
+ for (i = 0; i < g_func_pd_cnt; i++) {
+ pd = &g_func_pd[i];
+ fprintf(fout, " static const ");
+ if (pd->type == OPT_OFFSET) {
+ fprintf(fout, "void *jt_%s[] =\n { ", pd->label);
+
+ for (j = 0; j < pd->count; j++) {
+ if (j > 0)
+ fprintf(fout, ", ");
+ fprintf(fout, "&&%s", pd->d[j].u.label);
+ }
+ }
+ else {
+ fprintf(fout, "%s %s[] =\n { ",
+ lmod_type_u(ops, pd->lmod), pd->label);
+
+ for (j = 0; j < pd->count; j++) {
+ if (j > 0)
+ fprintf(fout, ", ");
+ fprintf(fout, "%u", pd->d[j].u.val);
+ }
+ }
+ fprintf(fout, " };\n");
+ had_decl = 1;
+ }
+
+ // 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);
+ had_decl = 1;
+ }
+
+ if (g_func_pp->is_userstack) {
+ fprintf(fout, " u32 fake_sf[US_SZ_%s / 4];\n", g_func_pp->name);
+ fprintf(fout, " u32 *esp = &fake_sf[sizeof(fake_sf) / 4];\n");
+ had_decl = 1;
+ }
+
+ if (g_func_pp->is_vararg) {
+ fprintf(fout, " va_list ap;\n");
+ had_decl = 1;
+ }
+
+ // 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 (regmask & (1 << reg)) {
+ if (g_func_pp->arg[i].type.is_retreg)
+ fprintf(fout, " u32 %s = *r_%s;\n",
+ g_func_pp->arg[i].reg, g_func_pp->arg[i].reg);
+ else
+ fprintf(fout, " u32 %s = (u32)a%d;\n",
+ g_func_pp->arg[i].reg, i + 1);
+ }
+ else {
+ if (g_func_pp->arg[i].type.is_retreg)
+ ferr(ops, "retreg '%s' is unused?\n",
+ g_func_pp->arg[i].reg);
+ fprintf(fout, " // %s = a%d; // unused\n",
+ g_func_pp->arg[i].reg, i + 1);
+ }
+ had_decl = 1;
+ }
+ }
+
+ regmask_now = regmask & ~regmask_arg;
+ regmask_now &= ~(1 << xSP);
+ if (regmask_now) {
+ for (reg = 0; reg < 8; reg++) {
+ if (regmask_now & (1 << reg)) {
+ fprintf(fout, " u32 %s", regs_r32[reg]);
+ if (regmask_init & (1 << reg))
+ fprintf(fout, " = 0");
+ fprintf(fout, ";\n");
+ had_decl = 1;
+ }
+ }
+ }
+
+ if (regmask_save) {
+ for (reg = 0; reg < 8; reg++) {
+ if (regmask_save & (1 << reg)) {
+ fprintf(fout, " u32 s_%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 (cond_vars) {
+ for (i = 0; i < 8; i++) {
+ if (cond_vars & (1 << i)) {
+ fprintf(fout, " u32 cond_%s;\n", parsed_flag_op_names[i]);
+ had_decl = 1;
+ }
+ }
+ }
+
+ if (need_tmp_var) {
+ fprintf(fout, " u32 tmp;\n");
+ had_decl = 1;
+ }
+
+ if (need_tmp64) {
+ fprintf(fout, " u64 tmp64;\n");
+ had_decl = 1;
+ }
+
+ if (had_decl)
+ fprintf(fout, "\n");
+
+ if (g_func_pp->is_vararg) {
+ if (g_func_pp->argc_stack == 0)
+ ferr(ops, "vararg func without stack args?\n");
+ fprintf(fout, " va_start(ap, a%d);\n", g_func_pp->argc);
+ }
+
+ // output ops
+ for (i = 0; i < opcnt; i++)
+ {
+ if (g_labels[i][0] != 0) {
+ fprintf(fout, "\n%s:\n", g_labels[i]);
+ label_pending = 1;
+
+ delayed_flag_op = NULL;
+ last_arith_dst = NULL;
+ }
+
+ 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;
+
+ tmp_op = po->datap;
+
+ // 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,
+ po->pfo, po->pfo_inv);
+ is_delayed = 1;
+ }
+ else if (last_arith_dst != NULL
+ && (po->pfo == PFO_Z || po->pfo == PFO_S || po->pfo == PFO_P
+ || (tmp_op && (tmp_op->op == OP_AND || tmp_op->op == OP_OR))
+ ))
+ {
+ out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst);
+ out_test_for_cc(buf1, sizeof(buf1), po, po->pfo, po->pfo_inv,
+ last_arith_dst->lmod, buf3);
+ is_delayed = 1;
+ }
+ else if (tmp_op != NULL) {
+ // use preprocessed flag calc results
+ if (!(tmp_op->pfomask & (1 << po->pfo)))
+ ferr(po, "not prepared for pfo %d\n", po->pfo);
+
+ // note: pfo_inv was not yet applied
+ snprintf(buf1, sizeof(buf1), "(%scond_%s)",
+ po->pfo_inv ? "!" : "", parsed_flag_op_names[po->pfo]);
+ }
+ else {
+ ferr(po, "all methods of finding comparison failed\n");
+ }
+
+ if (po->flags & OPF_JMP) {
+ fprintf(fout, " if %s", buf1);
+ }
+ else if (po->op == OP_RCL || po->op == OP_RCR
+ || po->op == OP_ADC || po->op == OP_SBB)
+ {
+ if (is_delayed)
+ fprintf(fout, " cond_%s = %s;\n",
+ parsed_flag_op_names[po->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;
+
+ if (po->flags & (OPF_REPZ|OPF_REPNZ)) {
+ struct parsed_opr opr = {0,};
+ opr.type = OPT_REG;
+ opr.reg = xCX;
+ opr.lmod = OPLM_DWORD;
+ ret = try_resolve_const(i, &opr, opcnt * 7 + i, &uval);
+
+ if (ret != 1 || uval == 0) {
+ // we need initial flags for ecx=0 case..
+ if (i > 0 && ops[i - 1].op == OP_XOR
+ && IS(ops[i - 1].operand[0].name,
+ ops[i - 1].operand[1].name))
+ {
+ fprintf(fout, " cond_z = ");
+ if (pfomask & (1 << PFO_C))
+ fprintf(fout, "cond_c = ");
+ fprintf(fout, "0;\n");
+ }
+ else if (last_arith_dst != NULL) {
+ out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst);
+ out_test_for_cc(buf1, sizeof(buf1), po, PFO_Z, 0,
+ last_arith_dst->lmod, buf3);
+ fprintf(fout, " cond_z = %s;\n", buf1);
+ }
+ else
+ ferr(po, "missing initial ZF\n");
+ }
+ }
+
+ switch (po->op)
+ {
+ case OP_MOV:
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ default_cast_to(buf3, sizeof(buf3), &po->operand[0]);
+ fprintf(fout, " %s = %s;", buf1,
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
+ buf3, 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],
+ NULL, 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_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ 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;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
+ buf3, 0));
+ break;
+
+ case OP_XCHG:
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ fprintf(fout, " tmp = %s;",
+ out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], "", 0));
+ fprintf(fout, " %s = %s;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
+ default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0));
+ fprintf(fout, " %s = %stmp;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[1]),
+ default_cast_to(buf3, sizeof(buf3), &po->operand[1]));
+ snprintf(g_comment, sizeof(g_comment), "xchg");
+ 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_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ strcpy(g_comment, "cdq");
+ break;
+
+ case OP_LODS:
+ assert_operand_cnt(3);
+ if (po->flags & OPF_REP) {
+ // hmh..
+ ferr(po, "TODO\n");
+ }
+ else {
+ fprintf(fout, " eax = %sesi; esi %c= %d;",
+ lmod_cast_u_ptr(po, po->operand[0].lmod),
+ (po->flags & OPF_DF) ? '-' : '+',
+ lmod_bytes(po, po->operand[0].lmod));
+ strcpy(g_comment, "lods");
+ }
+ break;
+
+ case OP_STOS:
+ assert_operand_cnt(3);
+ if (po->flags & OPF_REP) {
+ fprintf(fout, " for (; ecx != 0; ecx--, edi %c= %d)\n",
+ (po->flags & OPF_DF) ? '-' : '+',
+ lmod_bytes(po, po->operand[0].lmod));
+ fprintf(fout, " %sedi = eax;",
+ lmod_cast_u_ptr(po, po->operand[0].lmod));
+ strcpy(g_comment, "rep stos");
+ }
+ else {
+ fprintf(fout, " %sedi = eax; edi %c= %d;",
+ lmod_cast_u_ptr(po, po->operand[0].lmod),
+ (po->flags & OPF_DF) ? '-' : '+',
+ lmod_bytes(po, po->operand[0].lmod));
+ strcpy(g_comment, "stos");
+ }
+ break;
+
+ case OP_MOVS:
+ assert_operand_cnt(3);
+ j = lmod_bytes(po, po->operand[0].lmod);
+ strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod));
+ l = (po->flags & OPF_DF) ? '-' : '+';
+ if (po->flags & OPF_REP) {
+ fprintf(fout,
+ " for (; ecx != 0; ecx--, edi %c= %d, esi %c= %d)\n",
+ l, j, l, j);
+ fprintf(fout,
+ " %sedi = %sesi;", buf1, buf1);
+ strcpy(g_comment, "rep movs");
+ }
+ else {
+ fprintf(fout, " %sedi = %sesi; edi %c= %d; esi %c= %d;",
+ buf1, buf1, l, j, l, j);
+ strcpy(g_comment, "movs");
+ }
+ break;
+
+ case OP_CMPS:
+ // repe ~ repeat while ZF=1
+ assert_operand_cnt(3);
+ j = lmod_bytes(po, po->operand[0].lmod);
+ strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod));
+ l = (po->flags & OPF_DF) ? '-' : '+';
+ if (po->flags & OPF_REP) {
+ fprintf(fout,
+ " for (; ecx != 0; ecx--) {\n");
+ if (pfomask & (1 << PFO_C)) {
+ // ugh..
+ fprintf(fout,
+ " cond_c = %sesi < %sedi;\n", buf1, buf1);
+ pfomask &= ~(1 << PFO_C);
+ }
+ fprintf(fout,
+ " cond_z = (%sesi == %sedi); esi %c= %d, edi %c= %d;\n",
+ buf1, buf1, l, j, l, j);
+ fprintf(fout,
+ " if (cond_z %s 0) break;\n",
+ (po->flags & OPF_REPZ) ? "==" : "!=");
+ fprintf(fout,
+ " }");
+ snprintf(g_comment, sizeof(g_comment), "rep%s cmps",
+ (po->flags & OPF_REPZ) ? "e" : "ne");
+ }
+ else {
+ fprintf(fout,
+ " cond_z = (%sesi == %sedi); esi %c= %d; edi %c= %d;",
+ buf1, buf1, l, j, l, j);
+ strcpy(g_comment, "cmps");
+ }
+ pfomask &= ~(1 << PFO_Z);
+ last_arith_dst = NULL;
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_SCAS:
+ // only does ZF (for now)
+ // repe ~ repeat while ZF=1
+ assert_operand_cnt(3);
+ j = lmod_bytes(po, po->operand[0].lmod);
+ l = (po->flags & OPF_DF) ? '-' : '+';
+ if (po->flags & OPF_REP) {
+ fprintf(fout,
+ " for (; ecx != 0; ecx--) {\n");
+ fprintf(fout,
+ " cond_z = (%seax == %sedi); edi %c= %d;\n",
+ lmod_cast_u(po, po->operand[0].lmod),
+ lmod_cast_u_ptr(po, po->operand[0].lmod), l, j);
+ fprintf(fout,
+ " if (cond_z %s 0) break;\n",
+ (po->flags & OPF_REPZ) ? "==" : "!=");
+ fprintf(fout,
+ " }");
+ snprintf(g_comment, sizeof(g_comment), "rep%s scas",
+ (po->flags & OPF_REPZ) ? "e" : "ne");
+ }
+ else {
+ fprintf(fout, " cond_z = (%seax == %sedi); edi %c= %d;",
+ lmod_cast_u(po, po->operand[0].lmod),
+ lmod_cast_u_ptr(po, po->operand[0].lmod), l, j);
+ strcpy(g_comment, "scas");
+ }
+ pfomask &= ~(1 << PFO_Z);
+ last_arith_dst = NULL;
+ delayed_flag_op = NULL;
+ break;
+
+ // arithmetic w/flags
+ case OP_AND:
+ case OP_OR:
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ // fallthrough
+ 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_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_SHL:
+ case OP_SHR:
+ assert_operand_cnt(2);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (pfomask & (1 << PFO_C)) {
+ if (po->operand[1].type == OPT_CONST) {
+ l = lmod_bytes(po, po->operand[0].lmod) * 8;
+ j = po->operand[1].val;
+ j %= l;
+ if (j != 0) {
+ if (po->op == OP_SHL)
+ j = l - j;
+ else
+ j -= 1;
+ fprintf(fout, " cond_c = (%s >> %d) & 1;\n",
+ buf1, j);
+ }
+ else
+ ferr(po, "zero shift?\n");
+ }
+ else
+ ferr(po, "TODO\n");
+ pfomask &= ~(1 << PFO_C);
+ }
+ fprintf(fout, " %s %s= %s;", buf1, op_to_c(po),
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ 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_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_ROL:
+ case OP_ROR:
+ assert_operand_cnt(2);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (po->operand[1].type == OPT_CONST) {
+ j = po->operand[1].val;
+ j %= lmod_bytes(po, po->operand[0].lmod) * 8;
+ fprintf(fout, po->op == OP_ROL ?
+ " %s = (%s << %d) | (%s >> %d);" :
+ " %s = (%s >> %d) | (%s << %d);",
+ buf1, buf1, j, buf1,
+ lmod_bytes(po, po->operand[0].lmod) * 8 - j);
+ }
+ else
+ ferr(po, "TODO\n");
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_RCL:
+ case OP_RCR:
+ assert_operand_cnt(2);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ l = lmod_bytes(po, po->operand[0].lmod) * 8;
+ if (po->operand[1].type == OPT_CONST) {
+ j = po->operand[1].val % l;
+ if (j == 0)
+ ferr(po, "zero rotate\n");
+ fprintf(fout, " tmp = (%s >> %d) & 1;\n",
+ buf1, (po->op == OP_RCL) ? (l - j) : (j - 1));
+ if (po->op == OP_RCL) {
+ fprintf(fout,
+ " %s = (%s << %d) | (cond_c << %d)",
+ buf1, buf1, j, j - 1);
+ if (j != 1)
+ fprintf(fout, " | (%s >> %d)", buf1, l + 1 - j);
+ }
+ else {
+ fprintf(fout,
+ " %s = (%s >> %d) | (cond_c << %d)",
+ buf1, buf1, j, l - j);
+ if (j != 1)
+ fprintf(fout, " | (%s << %d)", buf1, l + 1 - j);
+ }
+ fprintf(fout, ";\n");
+ fprintf(fout, " cond_c = tmp;");
+ }
+ else
+ ferr(po, "TODO\n");
+ strcpy(g_comment, (po->op == OP_RCL) ? "rcl" : "rcr");
+ output_std_flags(fout, po, &pfomask, buf1);
+ 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
+ if (pfomask & (1 << PFO_BE)) { // weird, but it happens..
+ fprintf(fout, " cond_be = 1;\n");
+ pfomask &= ~(1 << PFO_BE);
+ }
+ 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_ADD:
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ if (pfomask & (1 << PFO_C)) {
+ out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]);
+ if (po->operand[0].lmod == OPLM_DWORD) {
+ fprintf(fout, " tmp64 = (u64)%s + %s;\n", buf1, buf2);
+ 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");
+ }
+ else {
+ fprintf(fout, " cond_c = ((u32)%s + %s) >> %d;\n",
+ buf1, buf2, lmod_bytes(po, po->operand[0].lmod) * 8);
+ fprintf(fout, " %s += %s;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ buf2);
+ }
+ pfomask &= ~(1 << PFO_C);
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+ }
+ goto dualop_arith;
+
+ case OP_SUB:
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ if (pfomask & (1 << PFO_C)) {
+ fprintf(fout, " cond_c = %s < %s;\n",
+ out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]),
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ pfomask &= ~(1 << PFO_C);
+ }
+ goto dualop_arith;
+
+ case OP_ADC:
+ case OP_SBB:
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (po->op == OP_SBB
+ && IS(po->operand[0].name, po->operand[1].name))
+ {
+ // avoid use of unitialized var
+ fprintf(fout, " %s = -cond_c;", buf1);
+ // carry remains what it was
+ pfomask &= ~(1 << PFO_C);
+ }
+ else {
+ fprintf(fout, " %s %s= %s + cond_c;", buf1, op_to_c(po),
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ }
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_BSF:
+ assert_operand_cnt(2);
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]);
+ fprintf(fout, " %s = %s ? __builtin_ffs(%s) - 1 : 0;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ buf2, buf2);
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ strcat(g_comment, "bsf");
+ break;
+
+ case OP_INC:
+ case OP_DEC:
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (po->operand[0].type == OPT_REG) {
+ strcpy(buf2, po->op == OP_INC ? "++" : "--");
+ fprintf(fout, " %s%s;", buf1, buf2);
+ }
+ else {
+ strcpy(buf2, po->op == OP_INC ? "+" : "-");
+ fprintf(fout, " %s %s= 1;", buf1, buf2);
+ }
+ output_std_flags(fout, po, &pfomask, buf1);
+ 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_u32(buf2, sizeof(buf2), po, &po->operand[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) {
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ goto dualop_arith;
+ }
+ if (po->operand_cnt == 3)
+ ferr(po, "TODO imul3\n");
+ // fallthrough
+ case OP_MUL:
+ assert_operand_cnt(1);
+ switch (po->operand[0].lmod) {
+ case OPLM_DWORD:
+ strcpy(buf1, po->op == OP_IMUL ? "(s64)(s32)" : "(u64)");
+ fprintf(fout, " tmp64 = %seax * %s%s;\n", buf1, buf1,
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]));
+ fprintf(fout, " edx = tmp64 >> 32;\n");
+ fprintf(fout, " eax = tmp64;");
+ break;
+ case OPLM_BYTE:
+ strcpy(buf1, po->op == OP_IMUL ? "(s16)(s8)" : "(u16)(u8)");
+ fprintf(fout, " LOWORD(eax) = %seax * %s;", buf1,
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[0],
+ buf1, 0));
+ break;
+ default:
+ ferr(po, "TODO: unhandled mul type\n");
+ break;
+ }
+ 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);
+
+ out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
+ strcpy(buf2, lmod_cast(po, po->operand[0].lmod,
+ po->op == OP_IDIV));
+ switch (po->operand[0].lmod) {
+ case OPLM_DWORD:
+ if (po->flags & OPF_32BIT)
+ snprintf(buf3, sizeof(buf3), "%seax", buf2);
+ else {
+ fprintf(fout, " tmp64 = ((u64)edx << 32) | eax;\n");
+ snprintf(buf3, sizeof(buf3), "%stmp64",
+ (po->op == OP_IDIV) ? "(s64)" : "");
+ }
+ if (po->operand[0].type == OPT_REG
+ && po->operand[0].reg == xDX)
+ {
+ fprintf(fout, " eax = %s / %s%s;", buf3, buf2, buf1);
+ fprintf(fout, " edx = %s %% %s%s;\n", buf3, buf2, buf1);
+ }
+ else {
+ fprintf(fout, " edx = %s %% %s%s;\n", buf3, buf2, buf1);
+ fprintf(fout, " eax = %s / %s%s;", buf3, buf2, buf1);
+ }
+ break;
+ default:
+ ferr(po, "unhandled division type\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;
+ last_arith_dst = NULL;
+ delayed_flag_op = po;
+ break;
+
+ case OP_SCC:
+ // SETcc - should already be handled
+ break;
+
+ // note: we reuse OP_Jcc for SETcc, only flags differ
+ case OP_JCC:
+ fprintf(fout, "\n goto %s;", po->operand[0].name);
+ break;
+
+ case OP_JECXZ:
+ fprintf(fout, " if (ecx == 0)\n");
+ fprintf(fout, " goto %s;", po->operand[0].name);
+ strcat(g_comment, "jecxz");
+ break;
+
+ case OP_JMP:
+ assert_operand_cnt(1);
+ last_arith_dst = NULL;
+ delayed_flag_op = NULL;
+
+ if (po->operand[0].type == OPT_REGMEM) {
+ ret = sscanf(po->operand[0].name, "%[^[][%[^*]*4]",
+ buf1, buf2);
+ if (ret != 2)
+ ferr(po, "parse failure for jmp '%s'\n",
+ po->operand[0].name);
+ fprintf(fout, " goto *jt_%s[%s];", buf1, buf2);
+ break;
+ }
+ else if (po->operand[0].type != OPT_LABEL)
+ ferr(po, "unhandled jmp type\n");
+
+ fprintf(fout, " goto %s;", po->operand[0].name);
+ break;
+
+ case OP_CALL:
+ assert_operand_cnt(1);
+ pp = po->pp;
+ my_assert_not(pp, NULL);
+
+ strcpy(buf3, " ");
+ if (po->flags & OPF_CC) {
+ // we treat conditional branch to another func
+ // (yes such code exists..) as conditional tailcall
+ strcat(buf3, " ");
+ fprintf(fout, " {\n");
+ }
+
+ if (pp->is_fptr && !pp->is_arg) {
+ fprintf(fout, "%s%s = %s;\n", buf3, pp->name,
+ out_src_opr(buf1, sizeof(buf1), po, &po->operand[0],
+ "(void *)", 0));
+ if (pp->is_unresolved)
+ fprintf(fout, "%sunresolved_call(\"%s:%d\", %s);\n",
+ buf3, asmfn, po->asmln, pp->name);
+ }
+
+ fprintf(fout, "%s", buf3);
+ if (strstr(pp->ret_type.name, "int64")) {
+ if (po->flags & OPF_TAIL)
+ ferr(po, "int64 and tail?\n");
+ fprintf(fout, "tmp64 = ");
+ }
+ else if (!IS(pp->ret_type.name, "void")) {
+ if (po->flags & OPF_TAIL) {
+ if (!IS(g_func_pp->ret_type.name, "void")) {
+ 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 & (1 << xAX)) {
+ fprintf(fout, "eax = ");
+ if (pp->ret_type.is_ptr)
+ fprintf(fout, "(u32)");
+ }
+ }
+
+ if (pp->name[0] == 0)
+ ferr(po, "missing pp->name\n");
+ fprintf(fout, "%s%s(", pp->name,
+ pp->has_structarg ? "_sa" : "");
+
+ if (po->flags & OPF_ATAIL) {
+ if (pp->argc_stack != g_func_pp->argc_stack
+ || (pp->argc_stack > 0
+ && pp->is_stdcall != g_func_pp->is_stdcall))
+ ferr(po, "incompatible tailcall\n");
+ if (g_func_pp->has_retreg)
+ ferr(po, "TODO: retreg+tailcall\n");
+
+ for (arg = j = 0; arg < pp->argc; arg++) {
+ if (arg > 0)
+ fprintf(fout, ", ");
+
+ cast[0] = 0;
+ if (pp->arg[arg].type.is_ptr)
+ snprintf(cast, sizeof(cast), "(%s)",
+ pp->arg[arg].type.name);
+
+ if (pp->arg[arg].reg != NULL) {
+ fprintf(fout, "%s%s", cast, pp->arg[arg].reg);
+ continue;
+ }
+ // stack arg
+ for (; j < g_func_pp->argc; j++)
+ if (g_func_pp->arg[j].reg == NULL)
+ break;
+ fprintf(fout, "%sa%d", cast, j + 1);
+ j++;
+ }
+ }
+ else {
+ for (arg = 0; arg < pp->argc; arg++) {
+ if (arg > 0)
+ fprintf(fout, ", ");
+
+ cast[0] = 0;
+ if (pp->arg[arg].type.is_ptr)
+ snprintf(cast, sizeof(cast), "(%s)",
+ pp->arg[arg].type.name);
+
+ if (pp->arg[arg].reg != NULL) {
+ if (pp->arg[arg].type.is_retreg)
+ fprintf(fout, "&%s", pp->arg[arg].reg);
+ else
+ fprintf(fout, "%s%s", cast, 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->flags & OPF_VAPUSH) {
+ fprintf(fout, "ap");
+ }
+ else if (tmp_op->p_argpass != 0) {
+ fprintf(fout, "a%d", tmp_op->p_argpass);
+ }
+ else if (tmp_op->p_argnum != 0) {
+ fprintf(fout, "%ss_a%d", cast, tmp_op->p_argnum);
+ }
+ else {
+ fprintf(fout, "%s",
+ out_src_opr(buf1, sizeof(buf1),
+ tmp_op, &tmp_op->operand[0], cast, 0));
+ }
+ }
+ }
+ fprintf(fout, ");");
+
+ if (strstr(pp->ret_type.name, "int64")) {
+ fprintf(fout, "\n");
+ fprintf(fout, "%sedx = tmp64 >> 32;\n", buf3);
+ fprintf(fout, "%seax = tmp64;", buf3);
+ }
+
+ if (pp->is_unresolved) {
+ snprintf(buf2, sizeof(buf2), " unresolved %dreg",
+ pp->argc_reg);
+ strcat(g_comment, buf2);
+ }
+
+ if (po->flags & OPF_TAIL) {
+ ret = 0;
+ if (i == opcnt - 1 || pp->is_noreturn)
+ ret = 0;
+ else if (IS(pp->ret_type.name, "void"))
+ ret = 1;
+ else if (IS(g_func_pp->ret_type.name, "void"))
+ ret = 1;
+ // else already handled as 'return f()'
+
+ if (ret) {
+ if (!IS(g_func_pp->ret_type.name, "void")) {
+ ferr(po, "int func -> void func tailcall?\n");
+ }
+ else {
+ fprintf(fout, "\n%sreturn;", buf3);
+ strcat(g_comment, " ^ tailcall");
+ }
+ }
+ else
+ strcat(g_comment, " tailcall");
+ }
+ if (pp->is_noreturn)
+ strcat(g_comment, " noreturn");
+ if ((po->flags & OPF_ATAIL) && pp->argc_stack > 0)
+ strcat(g_comment, " argframe");
+ if (po->flags & OPF_CC)
+ strcat(g_comment, " cond");
+
+ if (po->flags & OPF_CC)
+ fprintf(fout, "\n }");
+
+ delayed_flag_op = NULL;
+ last_arith_dst = NULL;
+ break;
+
+ case OP_RET:
+ if (g_func_pp->is_vararg)
+ fprintf(fout, " va_end(ap);\n");
+ if (g_func_pp->has_retreg) {
+ for (arg = 0; arg < g_func_pp->argc; arg++)
+ if (g_func_pp->arg[arg].type.is_retreg)
+ fprintf(fout, " *r_%s = %s;\n",
+ g_func_pp->arg[arg].reg, g_func_pp->arg[arg].reg);
+ }
+
+ if (IS(g_func_pp->ret_type.name, "void")) {
+ if (i != opcnt - 1 || label_pending)
+ fprintf(fout, " return;");
+ }
+ else if (g_func_pp->ret_type.is_ptr) {
+ fprintf(fout, " return (%s)eax;",
+ g_func_pp->ret_type.name);
+ }
+ else if (IS(g_func_pp->ret_type.name, "__int64"))
+ fprintf(fout, " return ((u64)edx << 32) | eax;");
+ else
+ fprintf(fout, " return eax;");
+
+ last_arith_dst = NULL;
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_PUSH:
+ out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (po->p_argnum != 0) {
+ // special case - saved func arg
+ fprintf(fout, " s_a%d = %s;", po->p_argnum, buf1);
+ break;
+ }
+ else if (po->flags & OPF_RSAVE) {
+ fprintf(fout, " s_%s = %s;", buf1, buf1);
+ break;
+ }
+ else if (g_func_pp->is_userstack) {
+ fprintf(fout, " *(--esp) = %s;", buf1);
+ break;
+ }
+ if (!(g_ida_func_attr & IDAFA_NORETURN))
+ ferr(po, "stray push encountered\n");
+ no_output = 1;
+ break;
+
+ case OP_POP:
+ if (po->flags & OPF_RSAVE) {
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ fprintf(fout, " %s = s_%s;", buf1, buf1);
+ break;
+ }
+ else if (po->datap != NULL) {
+ // push/pop pair
+ tmp_op = po->datap;
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ fprintf(fout, " %s = %s;", buf1,
+ out_src_opr(buf2, sizeof(buf2),
+ tmp_op, &tmp_op->operand[0],
+ default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0));
+ break;
+ }
+ else if (g_func_pp->is_userstack) {
+ fprintf(fout, " %s = *esp++;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]));
+ break;
+ }
+ else
+ ferr(po, "stray pop encountered\n");
+ break;
+
+ case OP_NOP:
+ no_output = 1;
+ break;
+
+ default:
+ no_output = 1;
+ ferr(po, "unhandled op type %d, flags %x\n",
+ po->op, po->flags);
+ break;
+ }
+
+ if (g_comment[0] != 0) {
+ char *p = g_comment;
+ while (my_isblank(*p))
+ p++;
+ fprintf(fout, " // %s", p);
+ g_comment[0] = 0;
+ no_output = 0;
+ }
+ if (!no_output)
+ fprintf(fout, "\n");
+
+ // some sanity checking
+ if (po->flags & OPF_REP) {
+ if (po->op != OP_STOS && po->op != OP_MOVS
+ && po->op != OP_CMPS && po->op != OP_SCAS)
+ ferr(po, "unexpected rep\n");
+ if (!(po->flags & (OPF_REPZ|OPF_REPNZ))
+ && (po->op == OP_CMPS || po->op == OP_SCAS))
+ ferr(po, "cmps/scas with plain rep\n");
+ }
+ if ((po->flags & (OPF_REPZ|OPF_REPNZ))
+ && po->op != OP_CMPS && po->op != OP_SCAS)
+ ferr(po, "unexpected repz/repnz\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, 0))
+ 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;
+ }
+
+ label_pending = 0;
+ }
+
+ if (g_stack_fsz && !g_stack_frame_used)
+ fprintf(fout, " (void)sf;\n");
+
+ fprintf(fout, "}\n\n");
+
+ // cleanup
+ for (i = 0; i < opcnt; i++) {
+ struct label_ref *lr, *lr_del;
+
+ lr = g_label_refs[i].next;
+ while (lr != NULL) {
+ lr_del = lr;
+ lr = lr->next;
+ free(lr_del);
+ }
+ g_label_refs[i].i = -1;
+ g_label_refs[i].next = NULL;
+
+ if (ops[i].op == OP_CALL) {
+ if (ops[i].pp)
+ proto_release(ops[i].pp);
+ }
+ }
+ g_func_pp = NULL;
+}
+
+static void set_label(int i, const char *name)
+{
+ const char *p;
+ int len;
+
+ len = strlen(name);
+ p = strchr(name, ':');
+ if (p != NULL)
+ len = p - name;
+
+ if (len > sizeof(g_labels[0]) - 1)
+ aerr("label '%s' too long: %d\n", name, len);
+ if (g_labels[i][0] != 0 && !IS_START(g_labels[i], "algn_"))
+ aerr("dupe label '%s' vs '%s'?\n", name, g_labels[i]);
+ memcpy(g_labels[i], name, len);
+ g_labels[i][len] = 0;
+}
+
+// '=' needs special treatment..
+static char *next_word_s(char *w, size_t wsize, char *s)
+{
+ size_t i;
+
+ s = sskip(s);
+
+ for (i = 0; i < wsize - 1; i++) {
+ if (s[i] == 0 || my_isblank(s[i]) || (s[i] == '=' && i > 0))
+ break;
+ w[i] = s[i];
+ }
+ w[i] = 0;
+
+ if (s[i] != 0 && !my_isblank(s[i]) && s[i] != '=')
+ printf("warning: '%s' truncated\n", w);
+
+ return s + i;
+}
+
+struct chunk_item {
+ char *name;
+ long fptr;
+ int asmln;
+};
+
+static struct chunk_item *func_chunks;
+static int func_chunk_cnt;
+static int func_chunk_alloc;
+
+static void add_func_chunk(FILE *fasm, const char *name, int line)
+{
+ if (func_chunk_cnt >= func_chunk_alloc) {
+ func_chunk_alloc *= 2;
+ func_chunks = realloc(func_chunks,
+ func_chunk_alloc * sizeof(func_chunks[0]));
+ my_assert_not(func_chunks, NULL);
+ }
+ func_chunks[func_chunk_cnt].fptr = ftell(fasm);
+ func_chunks[func_chunk_cnt].name = strdup(name);
+ func_chunks[func_chunk_cnt].asmln = line;
+ func_chunk_cnt++;
+}
+
+static int cmp_chunks(const void *p1, const void *p2)
+{
+ const struct chunk_item *c1 = p1, *c2 = 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];
+ char line[256];
+ long oldpos;
+ int oldasmln;
+ int wordc;
+ char *p;
+ int i;
+
+ oldpos = ftell(fasm);
+ oldasmln = asmln;
+
+ while (fgets(line, sizeof(line), fasm))
+ {
+ wordc = 0;
+ asmln++;
+
+ p = sskip(line);
+ if (*p == 0)
+ continue;
+
+ if (*p == ';')
+ {
+ // get rid of random tabs
+ for (i = 0; line[i] != 0; i++)
+ if (line[i] == '\t')
+ line[i] = ' ';
+
+ if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR "))
+ {
+ p += 30;
+ next_word(words[0], sizeof(words[0]), p);
+ if (words[0][0] == 0)
+ aerr("missing name for func chunk?\n");
+
+ add_func_chunk(fasm, words[0], asmln);
+ }
+ else if (IS_START(p, "; sctend"))
+ break;
+
+ continue;
+ } // *p == ';'
+
+ for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) {
+ words[wordc][0] = 0;
+ p = sskip(next_word_s(words[wordc], sizeof(words[0]), p));
+ if (*p == 0 || *p == ';') {
+ wordc++;
+ break;
+ }
+ }
+
+ if (wordc == 2 && IS(words[1], "ends"))
+ break;
+ }
+
+ fseek(fasm, oldpos, SEEK_SET);
+ asmln = oldasmln;
+}
+
+int main(int argc, char *argv[])
+{
+ FILE *fout, *fasm, *frlist;
+ struct parsed_data *pd = NULL;
+ int pd_alloc = 0;
+ char **rlist = NULL;
+ int rlist_len = 0;
+ int rlist_alloc = 0;
+ int func_chunks_used = 0;
+ int func_chunks_sorted = 0;
+ int func_chunk_i = -1;
+ long func_chunk_ret = 0;
+ int func_chunk_ret_ln = 0;
+ int scanned_ahead = 0;
+ char line[256];
+ char words[20][256];
+ enum opr_lenmod lmod;
+ char *sctproto = NULL;
+ int in_func = 0;
+ int pending_endp = 0;
+ int skip_func = 0;
+ int skip_warned = 0;
+ int eq_alloc;
+ int verbose = 0;
+ int multi_seg = 0;
+ int end = 0;
+ int arg_out;
+ int arg;
+ int pi = 0;
+ int i, j;
+ int ret, len;
+ char *p;
+ int wordc;
+
+ for (arg = 1; arg < argc; arg++) {
+ if (IS(argv[arg], "-v"))
+ verbose = 1;
+ else if (IS(argv[arg], "-rf"))
+ g_allow_regfunc = 1;
+ else if (IS(argv[arg], "-m"))
+ multi_seg = 1;
+ else
+ break;
+ }
+
+ if (argc < arg + 3) {
+ printf("usage:\n%s [-v] [-rf] [-m] <.c> <.asm> <hdrf> [rlist]*\n",
+ argv[0]);
+ return 1;
+ }
+
+ arg_out = arg++;
+
+ asmfn = argv[arg++];
+ fasm = fopen(asmfn, "r");
+ my_assert_not(fasm, NULL);
+
+ hdrfn = argv[arg++];
+ g_fhdr = fopen(hdrfn, "r");
+ my_assert_not(g_fhdr, NULL);
+
+ rlist_alloc = 64;
+ rlist = malloc(rlist_alloc * sizeof(rlist[0]));
+ my_assert_not(rlist, NULL);
+ // needs special handling..
+ rlist[rlist_len++] = "__alloca_probe";
+
+ func_chunk_alloc = 32;
+ func_chunks = malloc(func_chunk_alloc * sizeof(func_chunks[0]));
+ my_assert_not(func_chunks, NULL);
+
+ memset(words, 0, sizeof(words));
+
+ for (; arg < argc; arg++) {
+ frlist = fopen(argv[arg], "r");
+ my_assert_not(frlist, NULL);
+
+ while (fgets(line, sizeof(line), frlist)) {
+ p = sskip(line);
+ if (*p == 0 || *p == ';')
+ continue;
+ if (*p == '#') {
+ if (IS_START(p, "#if 0")
+ || (g_allow_regfunc && IS_START(p, "#if NO_REGFUNC")))
+ {
+ skip_func = 1;
+ }
+ else if (IS_START(p, "#endif"))
+ skip_func = 0;
+ continue;
+ }
+ if (skip_func)
+ continue;
+
+ p = next_word(words[0], sizeof(words[0]), p);
+ if (words[0][0] == 0)
+ continue;
+
+ if (rlist_len >= rlist_alloc) {
+ rlist_alloc = rlist_alloc * 2 + 64;
+ rlist = realloc(rlist, rlist_alloc * sizeof(rlist[0]));
+ my_assert_not(rlist, NULL);
+ }
+ rlist[rlist_len++] = strdup(words[0]);
+ }
+ skip_func = 0;
+
+ fclose(frlist);
+ frlist = NULL;
+ }
+
+ if (rlist_len > 0)
+ qsort(rlist, rlist_len, sizeof(rlist[0]), cmpstringp);
+
+ fout = fopen(argv[arg_out], "w");
+ my_assert_not(fout, NULL);
+
+ eq_alloc = 128;
+ g_eqs = malloc(eq_alloc * sizeof(g_eqs[0]));
+ my_assert_not(g_eqs, NULL);
+
+ for (i = 0; i < ARRAY_SIZE(g_label_refs); i++) {
+ g_label_refs[i].i = -1;
+ g_label_refs[i].next = NULL;
+ }
+
+ while (fgets(line, sizeof(line), fasm))
+ {
+ wordc = 0;
+ asmln++;
+
+ p = sskip(line);
+ if (*p == 0)
+ continue;
+
+ // get rid of random tabs
+ for (i = 0; line[i] != 0; i++)
+ if (line[i] == '\t')
+ line[i] = ' ';
+
+ if (*p == ';')
+ {
+ if (p[2] == '=' && IS_START(p, "; =============== S U B"))
+ goto do_pending_endp; // eww..
+
+ if (p[2] == 'A' && IS_START(p, "; Attributes:"))
+ {
+ static const char *attrs[] = {
+ "bp-based frame",
+ "library function",
+ "static",
+ "noreturn",
+ "thunk",
+ "fpd=",
+ };
+
+ // parse IDA's attribute-list comment
+ g_ida_func_attr = 0;
+ p = sskip(p + 13);
+
+ for (; *p != 0; p = sskip(p)) {
+ for (i = 0; i < ARRAY_SIZE(attrs); i++) {
+ if (!strncmp(p, attrs[i], strlen(attrs[i]))) {
+ g_ida_func_attr |= 1 << i;
+ p += strlen(attrs[i]);
+ break;
+ }
+ }
+ if (i == ARRAY_SIZE(attrs)) {
+ anote("unparsed IDA attr: %s\n", p);
+ break;
+ }
+ if (IS(attrs[i], "fpd=")) {
+ p = next_word(words[0], sizeof(words[0]), p);
+ // ignore for now..
+ }
+ }
+ }
+ else if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR "))
+ {
+ p += 30;
+ next_word(words[0], sizeof(words[0]), p);
+ if (words[0][0] == 0)
+ aerr("missing name for func chunk?\n");
+
+ if (!scanned_ahead) {
+ add_func_chunk(fasm, words[0], asmln);
+ func_chunks_sorted = 0;
+ }
+ }
+ else if (p[2] == 'E' && IS_START(p, "; END OF FUNCTION CHUNK"))
+ {
+ if (func_chunk_i >= 0) {
+ if (func_chunk_i < func_chunk_cnt
+ && IS(func_chunks[func_chunk_i].name, g_func))
+ {
+ // move on to next chunk
+ ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET);
+ if (ret)
+ aerr("seek failed for '%s' chunk #%d\n",
+ g_func, func_chunk_i);
+ asmln = func_chunks[func_chunk_i].asmln;
+ func_chunk_i++;
+ }
+ else {
+ if (func_chunk_ret == 0)
+ aerr("no return from chunk?\n");
+ fseek(fasm, func_chunk_ret, SEEK_SET);
+ asmln = func_chunk_ret_ln;
+ func_chunk_ret = 0;
+ pending_endp = 1;
+ }
+ }
+ }
+ else if (p[2] == 'F' && IS_START(p, "; FUNCTION CHUNK AT ")) {
+ func_chunks_used = 1;
+ p += 20;
+ if (IS_START(g_func, "sub_")) {
+ unsigned long addr = strtoul(p, NULL, 16);
+ unsigned long f_addr = strtoul(g_func + 4, NULL, 16);
+ if (addr > f_addr && !scanned_ahead) {
+ anote("scan_ahead caused by '%s', addr %lx\n",
+ g_func, addr);
+ scan_ahead(fasm);
+ scanned_ahead = 1;
+ func_chunks_sorted = 0;
+ }
+ }
+ }
+ continue;
+ } // *p == ';'
+
+parse_words:
+ for (i = wordc; i < ARRAY_SIZE(words); i++)
+ words[i][0] = 0;
+ for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) {
+ p = sskip(next_word_s(words[wordc], sizeof(words[0]), p));
+ if (*p == 0 || *p == ';') {
+ wordc++;
+ break;
+ }
+ }
+ if (*p != 0 && *p != ';')
+ aerr("too many words\n");
+
+ // alow asm patches in comments
+ if (*p == ';') {
+ if (IS_START(p, "; sctpatch:")) {
+ p = sskip(p + 11);
+ if (*p == 0 || *p == ';')
+ continue;
+ goto parse_words; // lame
+ }
+ if (IS_START(p, "; sctproto:")) {
+ sctproto = strdup(p + 11);
+ }
+ else if (IS_START(p, "; sctend")) {
+ end = 1;
+ if (!pending_endp)
+ break;
+ }
+ }
+
+ if (wordc == 0) {
+ // shouldn't happen
+ awarn("wordc == 0?\n");
+ 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;
+ }
+
+do_pending_endp:
+ // do delayed endp processing to collect switch jumptables
+ if (pending_endp) {
+ if (in_func && !skip_func && !end && wordc >= 2
+ && ((words[0][0] == 'd' && words[0][2] == 0)
+ || (words[1][0] == 'd' && words[1][2] == 0)))
+ {
+ i = 1;
+ if (words[1][0] == 'd' && words[1][2] == 0) {
+ // label
+ if (g_func_pd_cnt >= pd_alloc) {
+ pd_alloc = pd_alloc * 2 + 16;
+ g_func_pd = realloc(g_func_pd,
+ sizeof(g_func_pd[0]) * pd_alloc);
+ my_assert_not(g_func_pd, NULL);
+ }
+ pd = &g_func_pd[g_func_pd_cnt];
+ g_func_pd_cnt++;
+ memset(pd, 0, sizeof(*pd));
+ strcpy(pd->label, words[0]);
+ pd->type = OPT_CONST;
+ pd->lmod = lmod_from_directive(words[1]);
+ i = 2;
+ }
+ else {
+ if (pd == NULL) {
+ if (verbose)
+ anote("skipping alignment byte?\n");
+ continue;
+ }
+ lmod = lmod_from_directive(words[0]);
+ if (lmod != pd->lmod)
+ aerr("lmod change? %d->%d\n", pd->lmod, lmod);
+ }
+
+ if (pd->count_alloc < pd->count + wordc) {
+ pd->count_alloc = pd->count_alloc * 2 + 14 + wordc;
+ pd->d = realloc(pd->d, sizeof(pd->d[0]) * pd->count_alloc);
+ my_assert_not(pd->d, NULL);
+ }
+ for (; i < wordc; i++) {
+ if (IS(words[i], "offset")) {
+ pd->type = OPT_OFFSET;
+ i++;
+ }
+ p = strchr(words[i], ',');
+ if (p != NULL)
+ *p = 0;
+ if (pd->type == OPT_OFFSET)
+ pd->d[pd->count].u.label = strdup(words[i]);
+ else
+ pd->d[pd->count].u.val = parse_number(words[i]);
+ pd->d[pd->count].bt_i = -1;
+ pd->count++;
+ }
+ continue;
+ }
+
+ if (in_func && !skip_func)
+ gen_func(fout, g_fhdr, g_func, pi);
+
+ pending_endp = 0;
+ in_func = 0;
+ g_ida_func_attr = 0;
+ skip_warned = 0;
+ skip_func = 0;
+ g_func[0] = 0;
+ func_chunks_used = 0;
+ func_chunk_i = -1;
+ if (pi != 0) {
+ memset(&ops, 0, pi * sizeof(ops[0]));
+ memset(g_labels, 0, pi * sizeof(g_labels[0]));
+ pi = 0;
+ }
+ g_eqcnt = 0;
+ for (i = 0; i < g_func_pd_cnt; i++) {
+ pd = &g_func_pd[i];
+ if (pd->type == OPT_OFFSET) {
+ for (j = 0; j < pd->count; j++)
+ free(pd->d[j].u.label);
+ }
+ free(pd->d);
+ pd->d = NULL;
+ }
+ g_func_pd_cnt = 0;
+ pd = NULL;
+
+ if (end)
+ break;
+ if (wordc == 0)
+ continue;
+ }
+
+ if (IS(words[1], "proc")) {
+ if (in_func)
+ aerr("proc '%s' while in_func '%s'?\n",
+ words[0], g_func);
+ p = words[0];
+ if (bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp))
+ skip_func = 1;
+ strcpy(g_func, words[0]);
+ set_label(0, words[0]);
+ in_func = 1;
+ 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);
+
+ if ((g_ida_func_attr & IDAFA_THUNK) && pi == 1
+ && ops[0].op == OP_JMP && ops[0].operand[0].had_ds)
+ {
+ // import jump
+ skip_func = 1;
+ }
+
+ if (!skip_func && func_chunks_used) {
+ // start processing chunks
+ struct chunk_item *ci, key = { g_func, 0 };
+
+ func_chunk_ret = ftell(fasm);
+ func_chunk_ret_ln = asmln;
+ if (!func_chunks_sorted) {
+ qsort(func_chunks, func_chunk_cnt,
+ sizeof(func_chunks[0]), cmp_chunks);
+ func_chunks_sorted = 1;
+ }
+ ci = bsearch(&key, func_chunks, func_chunk_cnt,
+ sizeof(func_chunks[0]), cmp_chunks);
+ if (ci == NULL)
+ aerr("'%s' needs chunks, but none found\n", g_func);
+ func_chunk_i = ci - func_chunks;
+ for (; func_chunk_i > 0; func_chunk_i--)
+ if (!IS(func_chunks[func_chunk_i - 1].name, g_func))
+ break;
+
+ ret = fseek(fasm, func_chunks[func_chunk_i].fptr, SEEK_SET);
+ if (ret)
+ aerr("seek failed for '%s' chunk #%d\n", g_func, func_chunk_i);
+ asmln = func_chunks[func_chunk_i].asmln;
+ func_chunk_i++;
+ continue;
+ }
+ pending_endp = 1;
+ continue;
+ }
+
+ if (wordc == 2 && IS(words[1], "ends")) {
+ if (!multi_seg) {
+ end = 1;
+ if (pending_endp)
+ goto do_pending_endp;
+ break;
+ }
+
+ // scan for next text segment
+ while (fgets(line, sizeof(line), fasm)) {
+ asmln++;
+ p = sskip(line);
+ if (*p == 0 || *p == ';')
+ continue;
+
+ if (strstr(p, "segment para public 'CODE' use32"))
+ break;
+ }
+
+ continue;
+ }
+
+ p = strchr(words[0], ':');
+ if (p != NULL) {
+ set_label(pi, words[0]);
+ continue;
+ }
+
+ if (!in_func || skip_func) {
+ if (!skip_warned && !skip_func && g_labels[pi][0] != 0) {
+ if (verbose)
+ anote("skipping from '%s'\n", g_labels[pi]);
+ skip_warned = 1;
+ }
+ g_labels[pi][0] = 0;
+ continue;
+ }
+
+ if (wordc > 1 && 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);
+ }
+
+ 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;
+ }
+
+ if (pi >= ARRAY_SIZE(ops))
+ aerr("too many ops\n");
+
+ 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;
+ }
+ pi++;
+ }
+
+ fclose(fout);
+ fclose(fasm);
+ fclose(g_fhdr);
+
+ return 0;
+}
+
+// vim:ts=2:shiftwidth=2:expandtab