#include "my_assert.h"
#include "my_str.h"
+#include "common.h"
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#define IS(w, y) !strcmp(w, y)
static int g_header_mode;
#define ferr(op_, fmt, ...) do { \
- printf("%s:%d: error: [%s] '%s': " fmt, asmfn, (op_)->asmln, g_func, \
- dump_op(op_), ##__VA_ARGS__); \
+ printf("%s:%d: error %u: [%s] '%s': " fmt, asmfn, (op_)->asmln, \
+ __LINE__, g_func, dump_op(op_), ##__VA_ARGS__); \
fcloseall(); \
exit(1); \
} while (0)
static int scan_for_esp_adjust(int i, int opcnt,
int adj_expect, int *adj, int *is_multipath, int do_update)
{
+ int adj_expect_unknown = 0;
struct parsed_op *po;
int first_pop = -1;
+ int adj_best = 0;
*adj = *is_multipath = 0;
+ if (adj_expect < 0) {
+ adj_expect_unknown = 1;
+ adj_expect = 32 * 4; // enough?
+ }
for (; i < opcnt && *adj < adj_expect; i++) {
if (g_labels[i] != NULL)
}
*adj += lmod_bytes(po, po->operand[0].lmod);
+ if (*adj > adj_best)
+ adj_best = *adj;
}
else if (po->flags & (OPF_JMP|OPF_TAIL)) {
if (po->op == OP_JMP && po->btj == NULL) {
break;
if (po->pp != NULL && po->pp->is_stdcall)
break;
+ if (adj_expect_unknown && first_pop >= 0)
+ break;
// assume it's another cdecl call
}
}
if (first_pop >= 0) {
- // probably 'pop ecx' was used..
+ // probably only 'pop ecx' was used
+ *adj = adj_best;
return first_pop;
}
}
}
-// early check for tail call or branch back
-static int is_like_tailjmp(int j)
+static void add_label_ref(struct label_ref *lr, int op_i)
{
- if (!(ops[j].flags & OPF_JMP))
- return 0;
+ struct label_ref *lr_new;
- 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;
+ if (lr->i == -1) {
+ lr->i = op_i;
+ return;
+ }
- return 0;
+ lr_new = calloc(1, sizeof(*lr_new));
+ lr_new->i = op_i;
+ lr_new->next = lr->next;
+ lr->next = lr_new;
+}
+
+static struct parsed_data *try_resolve_jumptab(int i, int opcnt)
+{
+ struct parsed_op *po = &ops[i];
+ struct parsed_data *pd;
+ char label[NAMELEN], *p;
+ int len, j, l;
+
+ p = strchr(po->operand[0].name, '[');
+ if (p == NULL)
+ return NULL;
+
+ len = p - po->operand[0].name;
+ strncpy(label, po->operand[0].name, len);
+ label[len] = 0;
+
+ for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) {
+ if (IS(g_func_pd[j].label, label)) {
+ pd = &g_func_pd[j];
+ break;
+ }
+ }
+ if (pd == NULL)
+ //ferr(po, "label '%s' not parsed?\n", label);
+ return NULL;
+
+ if (pd->type != OPT_OFFSET)
+ ferr(po, "label '%s' with non-offset data?\n", label);
+
+ // find all labels, link
+ for (j = 0; j < pd->count; j++) {
+ for (l = 0; l < opcnt; l++) {
+ if (g_labels[l] != NULL && IS(g_labels[l], pd->d[j].u.label)) {
+ add_label_ref(&g_label_refs[l], i);
+ pd->d[j].bt_i = l;
+ break;
+ }
+ }
+ }
+
+ return pd;
+}
+
+static void clear_labels(int count)
+{
+ int i;
+
+ for (i = 0; i < count; i++) {
+ if (g_labels[i] != NULL) {
+ free(g_labels[i]);
+ g_labels[i] = NULL;
+ }
+ }
+}
+
+static void resolve_branches_parse_calls(int opcnt)
+{
+ const struct parsed_proto *pp_c;
+ struct parsed_proto *pp;
+ struct parsed_data *pd;
+ struct parsed_op *po;
+ const char *tmpname;
+ int i, l, ret;
+
+ for (i = 0; i < opcnt; i++)
+ {
+ po = &ops[i];
+ po->bt_i = -1;
+ po->btj = NULL;
+
+ 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(g_fhdr, tmpname, g_header_mode);
+ if (!g_header_mode && pp_c == NULL)
+ ferr(po, "proto_parse failed for call '%s'\n", tmpname);
+
+ if (pp_c != NULL) {
+ 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) {
+ pd = try_resolve_jumptab(i, opcnt);
+ if (pd == NULL)
+ goto tailcall;
+
+ po->btj = pd;
+ continue;
+ }
+
+ for (l = 0; l < opcnt; l++) {
+ if (g_labels[l] != NULL
+ && IS(po->operand[0].name, g_labels[l]))
+ {
+ if (l == i + 1 && po->op == OP_JMP) {
+ // yet another alignment type..
+ po->flags |= OPF_RMD|OPF_DONE;
+ 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
+ }
}
static void scan_prologue_epilogue(int opcnt)
found = 0;
do {
for (; i < opcnt; i++)
- if (ops[i].op == OP_RET)
+ if (ops[i].flags & OPF_TAIL)
break;
j = i - 1;
if (i == opcnt && (ops[j].flags & OPF_JMP)) {
- if (found && is_like_tailjmp(j))
- break;
+ if (ops[j].bt_i != -1 || ops[j].btj != NULL)
+ break;
+ i--;
j--;
}
{
ops[j].flags |= OPF_RMD | OPF_DONE;
}
+ else if (ops[i].op == OP_CALL && ops[i].pp != NULL
+ && ops[i].pp->is_noreturn)
+ {
+ // on noreturn, msvc sometimes cleans stack, sometimes not
+ i++;
+ found = 1;
+ continue;
+ }
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
+ if (ops[j].op == OP_LEAVE)
+ j--;
+ else if (ops[j].op == OP_POP
+ && 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 | OPF_DONE;
+ j -= 2;
}
- else if (ops[j].op != OP_LEAVE
- && !(g_ida_func_attr & IDAFA_NORETURN))
+ else if (!(g_ida_func_attr & IDAFA_NORETURN))
{
- ferr(&ops[j - 1], "esp restore expected\n");
+ ferr(&ops[j], "esp restore expected\n");
}
- if (ecx_push && ops[j - 2].op == OP_POP
- && IS(opr_name(&ops[j - 2], 0), "ecx"))
+ if (ecx_push && j >= 0 && ops[j].op == OP_POP
+ && IS(opr_name(&ops[j], 0), "ecx"))
{
- ferr(&ops[j - 2], "unexpected ecx pop\n");
+ ferr(&ops[j], "unexpected ecx pop\n");
}
}
i++;
} while (i < opcnt);
+ if (!found)
+ ferr(ops, "missing ebp epilogue\n");
return;
}
i++;
do {
for (; i < opcnt; i++)
- if (ops[i].op == OP_RET)
+ if (ops[i].flags & OPF_TAIL)
break;
j = i - 1;
if (i == opcnt && (ops[j].flags & OPF_JMP)) {
- if (found && is_like_tailjmp(j))
- break;
+ if (ops[j].bt_i != -1 || ops[j].btj != NULL)
+ break;
+ i--;
j--;
}
i++;
} while (i < opcnt);
+
+ if (!found)
+ ferr(ops, "missing esp epilogue\n");
}
}
}
if (ops[i].cc_scratch == magic)
- return 0;
+ return ret;
ops[i].cc_scratch = magic;
if (!(ops[i].flags & OPF_DATA))
if (*op_i >= 0) {
if (*op_i == i)
- return 1;
+ return ret | 1;
+
// XXX: could check if the other op does the same
return -1;
}
*op_i = i;
- return 1;
+ return ret | 1;
}
}
struct parsed_proto *pp;
int multipath = 0;
int adj = 0;
- int ret;
+ int j, ret;
pp = po->pp;
if (pp == NULL || pp->is_vararg || pp->argc_reg != 0)
return NULL;
if (multipath)
return NULL;
- if (ops[ret].op == OP_POP && adj != 4)
- return NULL;
+ if (ops[ret].op == OP_POP) {
+ for (j = 1; j < adj / 4; j++) {
+ if (ops[ret + j].op != OP_POP
+ || ops[ret + j].operand[0].reg != xCX)
+ {
+ return NULL;
+ }
+ }
+ }
}
*adj_i = ret;
pp->is_fptr = 1;
ret = scan_for_esp_adjust(i + 1, opcnt,
- 32*4, &adj, &multipath, 0);
+ -1, &adj, &multipath, 0);
if (ret < 0 || adj < 0) {
if (!g_allow_regfunc)
ferr(po, "non-__cdecl indirect call unhandled yet\n");
// look for and make use of esp adjust
multipath = 0;
ret = -1;
- if (!pp->is_stdcall && pp->argc_stack > 0)
+ if (!pp->is_stdcall && pp->argc_stack > 0) {
+ int adj_expect = pp->is_vararg ? -1 : pp->argc_stack * 4;
ret = scan_for_esp_adjust(i + 1, opcnt,
- pp->argc_stack * 4, &adj, &multipath, 0);
+ adj_expect, &adj, &multipath, 0);
+ }
if (ret >= 0) {
if (pp->is_vararg) {
if (adj / 4 < pp->argc_stack) {
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 struct parsed_data *try_resolve_jumptab(int i, int opcnt)
-{
- struct parsed_op *po = &ops[i];
- struct parsed_data *pd;
- char label[NAMELEN], *p;
- int len, j, l;
-
- p = strchr(po->operand[0].name, '[');
- if (p == NULL)
- return NULL;
-
- len = p - po->operand[0].name;
- strncpy(label, po->operand[0].name, len);
- label[len] = 0;
-
- for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) {
- if (IS(g_func_pd[j].label, label)) {
- pd = &g_func_pd[j];
- break;
- }
- }
- if (pd == NULL)
- //ferr(po, "label '%s' not parsed?\n", label);
- return NULL;
-
- if (pd->type != OPT_OFFSET)
- ferr(po, "label '%s' with non-offset data?\n", label);
-
- // find all labels, link
- for (j = 0; j < pd->count; j++) {
- for (l = 0; l < opcnt; l++) {
- if (g_labels[l] != NULL && IS(g_labels[l], pd->d[j].u.label)) {
- add_label_ref(&g_label_refs[l], i);
- pd->d[j].bt_i = l;
- break;
- }
- }
- }
-
- return pd;
-}
-
-static void clear_labels(int count)
-{
- int i;
-
- for (i = 0; i < count; i++) {
- if (g_labels[i] != NULL) {
- free(g_labels[i]);
- g_labels[i] = NULL;
- }
- }
-}
-
static void output_std_flags(FILE *fout, struct parsed_op *po,
int *pfomask, const char *dst_opr_text)
{
}
}
- return regmask;
-}
-
-static char *saved_arg_name(char *buf, size_t buf_size, int grp, int num)
-{
- char buf1[16];
-
- buf1[0] = 0;
- if (grp > 0)
- snprintf(buf1, sizeof(buf1), "%d", grp);
- snprintf(buf, buf_size, "s%s_a%d", buf1, num);
-
- return buf;
-}
-
-static void gen_x_cleanup(int opcnt);
-
-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[MAX_ARG_GRP] = { 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; // regs saved/restored in this func
- int regmask_arg = 0; // regs carrying function args (fastcall, etc)
- int regmask_now; // temp
- int regmask_init = 0; // regs that need zero initialization
- int regmask_pp = 0; // regs used in complex push-pop graph
- int regmask = 0; // used regs
- 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);
-
- regmask_arg = get_pp_arg_regmask(g_func_pp);
-
- // pass1:
- // - handle ebp/esp frame, remove ops related to it
- scan_prologue_epilogue(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|OPF_DONE))
- 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;
+ return regmask;
+}
- if (po->operand[0].type == OPT_REGMEM) {
- pd = try_resolve_jumptab(i, opcnt);
- if (pd == NULL)
- goto tailcall;
+static char *saved_arg_name(char *buf, size_t buf_size, int grp, int num)
+{
+ char buf1[16];
- po->btj = pd;
- continue;
- }
+ buf1[0] = 0;
+ if (grp > 0)
+ snprintf(buf1, sizeof(buf1), "%d", grp);
+ snprintf(buf, buf_size, "s%s_a%d", buf1, num);
- for (l = 0; l < opcnt; l++) {
- if (g_labels[l] != NULL
- && IS(po->operand[0].name, g_labels[l]))
- {
- if (l == i + 1 && po->op == OP_JMP) {
- // yet another alignment type..
- po->flags |= OPF_RMD|OPF_DONE;
- break;
- }
- add_label_ref(&g_label_refs[l], i);
- po->bt_i = l;
- break;
- }
- }
+ return buf;
+}
- if (po->bt_i != -1 || (po->flags & OPF_RMD))
- continue;
+static void gen_x_cleanup(int opcnt);
- if (po->operand[0].type == OPT_LABEL)
- // assume tail call
- goto tailcall;
+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];
+ struct parsed_proto *pp, *pp_tmp;
+ struct parsed_data *pd;
+ unsigned int uval;
+ int save_arg_vars[MAX_ARG_GRP] = { 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; // regs saved/restored in this func
+ int regmask_arg = 0; // regs carrying function args (fastcall, etc)
+ int regmask_now; // temp
+ int regmask_init = 0; // regs that need zero initialization
+ int regmask_pp = 0; // regs used in complex push-pop graph
+ int regmask = 0; // used regs
+ int pfomask = 0;
+ int found = 0;
+ int depth = 0;
+ int no_output;
+ int i, j, l;
+ int arg;
+ int reg;
+ int ret;
- ferr(po, "unhandled branch\n");
+ g_bp_frame = g_sp_frame = g_stack_fsz = 0;
+ g_stack_frame_used = 0;
-tailcall:
- po->op = OP_CALL;
- po->flags |= OPF_TAIL;
- if (i > 0 && ops[i - 1].op == OP_POP)
- po->flags |= OPF_ATAIL;
- i--; // reprocess
- }
+ g_func_pp = proto_parse(fhdr, funcn, 0);
+ if (g_func_pp == NULL)
+ ferr(ops, "proto_parse failed for '%s'\n", funcn);
+
+ regmask_arg = get_pp_arg_regmask(g_func_pp);
+
+ // pass1:
+ // - resolve all branches
+ // - parse calls with labels
+ resolve_branches_parse_calls(opcnt);
+
+ // pass2:
+ // - handle ebp/esp frame, remove ops related to it
+ scan_prologue_epilogue(opcnt);
// pass3:
// - remove dead labels
- // - process trivial calls
for (i = 0; i < opcnt; i++)
{
if (g_labels[i] != NULL && g_label_refs[i].i == -1) {
free(g_labels[i]);
g_labels[i] = NULL;
}
+ }
+ // pass4:
+ // - process trivial calls
+ for (i = 0; i < opcnt; i++)
+ {
po = &ops[i];
if (po->flags & (OPF_RMD|OPF_DONE))
continue;
if (pp != NULL) {
if (j >= 0) {
// commit esp adjust
- ops[j].flags |= OPF_RMD;
if (ops[j].op != OP_POP)
patch_esp_adjust(&ops[j], pp->argc_stack * 4);
- else
- ops[j].flags |= OPF_DONE;
+ else {
+ for (l = 0; l < pp->argc_stack; l++)
+ ops[j + l].flags |= OPF_DONE | OPF_RMD;
+ }
}
if (strstr(pp->ret_type.name, "int64"))
}
}
- // pass4:
+ // pass5:
// - process calls
// - handle push <const>/pop pairs
for (i = 0; i < opcnt; i++)
scan_for_pop_const(i, opcnt, ®mask_pp);
}
- // pass5:
+ // pass6:
// - find POPs for PUSHes, rm both
// - scan for STD/CLD, propagate DF
// - scan for all used registers
}
}
- // pass6:
+ // pass7:
// - confirm regmask_save, it might have been reduced
if (regmask_save != 0)
{
// arithmetic w/flags
case OP_AND:
+ if (po->operand[1].type == OPT_CONST && !po->operand[1].val) {
+ // deal with complex dst clear
+ 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],
+ default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0));
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+ }
+ // fallthrough
case OP_OR:
propagate_lmod(po, &po->operand[0], &po->operand[1]);
// fallthrough
static void output_hdr_fp(FILE *fout, const struct func_prototype *fp,
int count);
+struct func_prototype *hg_fp_add(const char *funcn)
+{
+ struct func_prototype *fp;
+
+ if ((hg_fp_cnt & 0xff) == 0) {
+ hg_fp = realloc(hg_fp, sizeof(hg_fp[0]) * (hg_fp_cnt + 0x100));
+ my_assert_not(hg_fp, NULL);
+ memset(hg_fp + hg_fp_cnt, 0, sizeof(hg_fp[0]) * 0x100);
+ }
+
+ fp = &hg_fp[hg_fp_cnt];
+ snprintf(fp->name, sizeof(fp->name), "%s", funcn);
+ fp->id = hg_fp_cnt;
+ fp->argc_stack = -1;
+ hg_fp_cnt++;
+
+ return fp;
+}
+
static struct func_proto_dep *hg_fp_find_dep(struct func_prototype *fp,
const char *name)
{
}
}
+ // if has_ret is 0, there is uninitialized eax path,
+ // which means it's most likely void func
if (*has_ret != 0 && (po->flags & OPF_TAIL)) {
if (po->op == OP_CALL) {
j = i;
ret = resolve_origin(i, &opr, i + opcnt * 4, &j, &from_caller);
}
- if (ret == -1 && from_caller) {
+ if (ret != 1 && from_caller) {
// unresolved eax - probably void func
*has_ret = 0;
}
else {
- if (ops[j].op == OP_CALL) {
- dep = hg_fp_find_dep(fp, po->operand[0].name);
+ if (j >= 0 && ops[j].op == OP_CALL) {
+ dep = hg_fp_find_dep(fp, ops[j].operand[0].name);
if (dep != NULL)
dep->ret_dep = 1;
else
const struct parsed_proto *pp_c;
struct parsed_proto *pp;
struct func_prototype *fp;
- struct parsed_data *pd;
struct parsed_op *po;
- const char *tmpname;
int regmask_dummy = 0;
int regmask_dep;
int max_bp_offset = 0;
int has_ret;
- int i, j, l, ret;
-
- if ((hg_fp_cnt & 0xff) == 0) {
- hg_fp = realloc(hg_fp, sizeof(hg_fp[0]) * (hg_fp_cnt + 0x100));
- my_assert_not(hg_fp, NULL);
- memset(hg_fp + hg_fp_cnt, 0, sizeof(hg_fp[0]) * 0x100);
- }
-
- fp = &hg_fp[hg_fp_cnt];
- snprintf(fp->name, sizeof(fp->name), "%s", funcn);
- fp->id = hg_fp_cnt;
- fp->argc_stack = -1;
- hg_fp_cnt++;
+ int i, j, l;
+ int ret;
- // perhaps already in seed header?
- fp->pp = proto_parse(g_fhdr, funcn, 1);
- if (fp->pp != NULL) {
- fp->argc_stack = fp->pp->argc_stack;
- fp->is_stdcall = fp->pp->is_stdcall;
- fp->regmask_dep = get_pp_arg_regmask(fp->pp);
- fp->has_ret = !IS(fp->pp->ret_type.name, "void");
+ pp_c = proto_parse(g_fhdr, funcn, 1);
+ if (pp_c != NULL)
+ // already in seed, will add to hg_fp later
return;
- }
+
+ fp = hg_fp_add(funcn);
g_bp_frame = g_sp_frame = g_stack_fsz = 0;
g_stack_frame_used = 0;
// pass1:
+ // - resolve all branches
+ // - parse calls with labels
+ resolve_branches_parse_calls(opcnt);
+
+ // pass2:
// - handle ebp/esp frame, remove ops related to it
scan_prologue_epilogue(opcnt);
- // pass2:
+ // pass3:
+ // - remove dead labels
// - collect calls
- // - resolve all branches
for (i = 0; i < opcnt; i++)
{
- po = &ops[i];
- po->bt_i = -1;
- po->btj = NULL;
+ if (g_labels[i] != NULL && g_label_refs[i].i == -1) {
+ free(g_labels[i]);
+ g_labels[i] = NULL;
+ }
+ po = &ops[i];
if (po->flags & (OPF_RMD|OPF_DONE))
continue;
if (po->op == OP_CALL) {
- tmpname = opr_name(po, 0);
- pp = NULL;
- if (po->operand[0].type == OPT_LABEL) {
- hg_fp_add_dep(fp, tmpname);
-
- // perhaps a call to already known func?
- pp_c = proto_parse(g_fhdr, tmpname, 1);
- if (pp_c != NULL)
- pp = proto_clone(pp_c);
- }
- 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 && 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) {
- pd = try_resolve_jumptab(i, opcnt);
- if (pd == NULL)
- goto tailcall;
-
- po->btj = pd;
- continue;
- }
-
- for (l = 0; l < opcnt; l++) {
- if (g_labels[l] != NULL
- && IS(po->operand[0].name, g_labels[l]))
- {
- add_label_ref(&g_label_refs[l], i);
- po->bt_i = l;
- break;
- }
+ if (po->operand[0].type == OPT_LABEL)
+ hg_fp_add_dep(fp, opr_name(po, 0));
+ else if (po->pp != NULL)
+ hg_fp_add_dep(fp, po->pp->name);
}
-
- 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:
+ // pass4:
// - remove dead labels
// - handle push <const>/pop pairs
for (i = 0; i < opcnt; i++)
scan_for_pop_const(i, opcnt, ®mask_dummy);
}
- // pass4:
+ // pass5:
// - process trivial calls
for (i = 0; i < opcnt; i++)
{
if (pp != NULL) {
if (j >= 0) {
// commit esp adjust
- ops[j].flags |= OPF_RMD;
if (ops[j].op != OP_POP)
patch_esp_adjust(&ops[j], pp->argc_stack * 4);
- else
- ops[j].flags |= OPF_DONE;
+ else {
+ for (l = 0; l < pp->argc_stack; l++)
+ ops[j + l].flags |= OPF_DONE | OPF_RMD;
+ }
}
po->flags |= OPF_DONE;
}
}
- // pass5:
+ // pass6:
// - track saved regs (simple)
// - process calls
for (i = 0; i < opcnt; i++)
}
}
- // pass6
+ // pass7
memset(cbits, 0, sizeof(cbits));
regmask_dep = 0;
has_ret = -1;
ferr(&ops[i], "unreachable code\n");
}
- if (has_ret == -1 && (regmask_dep & (1 << xAX)))
- has_ret = 1;
-
for (i = 0; i < g_eqcnt; i++) {
if (g_eqs[i].offset > max_bp_offset && g_eqs[i].offset < 4*32)
max_bp_offset = g_eqs[i].offset;
printf("// has_ret %d, regmask_dep %x\n",
fp->has_ret, fp->regmask_dep);
output_hdr_fp(stdout, fp, 1);
- if (IS(funcn, "sub_100073FD")) exit(1);
+ if (IS(funcn, "sub_10007F72")) exit(1);
#endif
gen_x_cleanup(opcnt);
// printf("dep %s %s |= %x\n", fp->name,
// fp->dep_func[i].name, dep);
- if (fp->has_ret == -1)
+ if (fp->has_ret == -1 && fp->dep_func[i].ret_dep)
fp->has_ret = fp->dep_func[i].proto->has_ret;
}
}
[OPLM_QWORD] = "uint64_t",
};
const struct scanned_var *var;
+ struct func_prototype *fp;
char line[256] = { 0, };
+ char name[256];
int i;
+ // add stuff from headers
+ for (i = 0; i < pp_cache_size; i++) {
+ if (pp_cache[i].is_cinc && !pp_cache[i].is_stdcall)
+ snprintf(name, sizeof(name), "_%s", pp_cache[i].name);
+ else
+ snprintf(name, sizeof(name), "%s", pp_cache[i].name);
+ fp = hg_fp_add(name);
+ fp->pp = &pp_cache[i];
+ fp->argc_stack = fp->pp->argc_stack;
+ fp->is_stdcall = fp->pp->is_stdcall;
+ fp->regmask_dep = get_pp_arg_regmask(fp->pp);
+ fp->has_ret = !IS(fp->pp->ret_type.name, "void");
+ }
+
// resolve deps
qsort(hg_fp, hg_fp_cnt, sizeof(hg_fp[0]), hg_fp_cmp_name);
for (i = 0; i < hg_fp_cnt; i++)
fwrite(line, 1, strlen(line), fout);
}
-// read a line, truncating it if it doesn't fit
-static char *my_fgets(char *s, size_t size, FILE *stream)
-{
- char *ret, *ret2;
- char buf[64];
- int p;
-
- p = size - 2;
- if (p >= 0)
- s[p] = 0;
-
- ret = fgets(s, size, stream);
- if (ret != NULL && p >= 0 && s[p] != 0 && s[p] != '\n') {
- p = sizeof(buf) - 2;
- do {
- buf[p] = 0;
- ret2 = fgets(buf, sizeof(buf), stream);
- }
- while (ret2 != NULL && buf[p] != 0 && buf[p] != '\n');
- }
-
- return ret;
-}
-
// '=' needs special treatment
// also ' quote
static char *next_word_s(char *w, size_t wsize, char *s)
if (wordc < 2)
continue;
+ if (IS_START(words[0], "__IMPORT_DESCRIPTOR_")) {
+ // when this starts, we don't need anything from this section
+ break;
+ }
+
if ((hg_var_cnt & 0xff) == 0) {
hg_vars = realloc(hg_vars, sizeof(hg_vars[0])
* (hg_var_cnt + 0x100));
notaz.gp2x.de / ia32rtools.git / blobdiff