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libr/bin/format/mach0: check Mach0 format correctness

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if there is LC_MAIN or LC_UNIXTHREAD in the file, you can't have other
threads
This commit is contained in:
Riccardo Schirone 2014-11-22 16:39:37 -08:00 committed by pancake
parent 4762795c87
commit 24368ac3de
1 changed files with 15 additions and 0 deletions
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15
libr/bin/format/mach0/mach0.c
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@ -346,6 +346,7 @@ static int MACH0_(r_bin_mach0_parse_dylib)(struct MACH0_(r_bin_mach0_obj_t)* bin
static int MACH0_(r_bin_mach0_init_items)(struct MACH0_(r_bin_mach0_obj_t)* bin) {
struct load_command lc = {0, 0};
boolt is_first_thread = R_TRUE;
ut64 off = 0LL;
int i, len;
@ -439,17 +440,31 @@ static int MACH0_(r_bin_mach0_init_items)(struct MACH0_(r_bin_mach0_obj_t)* bin)
ut64 eo;
ut64 ss;
} ep = {0};
if (!is_first_thread) {
eprintf("Error: LC_MAIN with other threads\n");
return R_FALSE;
}
r_buf_fread_at (bin->b, off+8, (void*)&ep,
bin->endian?"2L": "2l", 1);
bin->entry = ep.eo;
sdb_num_set (bin->kv, "entry0", ep.eo, 0);
sdb_num_set (bin->kv, "stacksize", ep.ss, 0);
is_first_thread = R_FALSE;
}
break;
case LC_UNIXTHREAD:
if (!is_first_thread) {
eprintf("Error: LC_UNIXTHREAD with other threads\n");
return R_FALSE;
}
case LC_THREAD:
if (!MACH0_(r_bin_mach0_parse_thread)(bin, off))
return R_FALSE;
is_first_thread = R_FALSE;
break;
case LC_LOAD_DYLIB:
bin->nlibs++;