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* Import not-yet-used backtrace code for x86-32/64

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pancake 2010-02-24 11:21:47 +01:00
parent 69f29d82bd
commit 1db9134674
1 changed files with 59 additions and 0 deletions
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59
libr/debug/bt.c Normal file
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/* TODO: not yet integrate */
#define MAXBT 128
/* TODO: Can I use this as in a coroutine? */
static int backtrace_i386(RIOBind *bio, ut32 _esp) {
ut32 i, esp, ebp2;
ut8 buf[4];
// TODO: implement [stack] map uptrace method too
esp = _esp;
for (i=0; i<MAXBT; i++) {
bio->read_at (bio->io, esp, &ebp2, 4);
*buf = '\0';
bio->read_at (bio->io, (ebp2-5)-(ebp2-5)%4, &buf, 4);
// TODO: arch_is_call() here and this fun will be portable
if (buf[(ebp2-5)%4]==0xe8) {
eprintf ("ADDR: 0x%08x, SIZE: 0x%x\n", addr, esp-_esp);
}
esp += 4;
}
return i;
}
// XXX: Do this works correctly?
static int backtrace_x86_64(RIOBind *bio, ut64 _rip, ut64 _rsp, ut64 _rbp) {
/*
%ebp points to the old ebp var
%ebp+4 points to ret
*/
int ret, i;
ut8 buf[4];
ut64 ptr, ebp2;
debug_read_at (ps.tid, &buf, 4, _rip);
/* Handle before function prelude: push %ebp ; mov %esp, %ebp */
if (!memcmp(buf, "\x55\x89\xe5", 3) || !memcmp(buf, "\x89\xe5\x57", 3)) {
if (bio->read_at (bio->io, _rsp, &ptr, 4) != 4) {
eprintf ("read error at 0x%08llx\n", _rsp);
return R_FALSE;
}
eprintf ("ADDR: 0x%08llx\n", ptr); // TODO: size!
_rbp = ptr;
}
for(i=1; i<MAXBT; i++) {
// TODO: make those two reads in a shot
bio->read_at (bio->io, _rbp, &ebp2, 4);
bio->read_at (bio->io, _rbp+4, &ptr, 4);
if (ptr == 0x0 || _rbp == 0x0)
break;
eprintf ("ADDR: 0x%08llx\n", ptr);
_rbp = ebp2;
}
return i;
return R_TRUE;
}