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* Import not-yet-used backtrace code for x86-32/64
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59
libr/debug/bt.c
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59
libr/debug/bt.c
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@ -0,0 +1,59 @@
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/* TODO: not yet integrate */
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#define MAXBT 128
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/* TODO: Can I use this as in a coroutine? */
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static int backtrace_i386(RIOBind *bio, ut32 _esp) {
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ut32 i, esp, ebp2;
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ut8 buf[4];
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// TODO: implement [stack] map uptrace method too
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esp = _esp;
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for (i=0; i<MAXBT; i++) {
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bio->read_at (bio->io, esp, &ebp2, 4);
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*buf = '\0';
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bio->read_at (bio->io, (ebp2-5)-(ebp2-5)%4, &buf, 4);
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// TODO: arch_is_call() here and this fun will be portable
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if (buf[(ebp2-5)%4]==0xe8) {
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eprintf ("ADDR: 0x%08x, SIZE: 0x%x\n", addr, esp-_esp);
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}
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esp += 4;
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}
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return i;
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}
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// XXX: Do this works correctly?
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static int backtrace_x86_64(RIOBind *bio, ut64 _rip, ut64 _rsp, ut64 _rbp) {
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/*
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%ebp points to the old ebp var
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%ebp+4 points to ret
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*/
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int ret, i;
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ut8 buf[4];
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ut64 ptr, ebp2;
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debug_read_at (ps.tid, &buf, 4, _rip);
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/* Handle before function prelude: push %ebp ; mov %esp, %ebp */
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if (!memcmp(buf, "\x55\x89\xe5", 3) || !memcmp(buf, "\x89\xe5\x57", 3)) {
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if (bio->read_at (bio->io, _rsp, &ptr, 4) != 4) {
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eprintf ("read error at 0x%08llx\n", _rsp);
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return R_FALSE;
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}
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eprintf ("ADDR: 0x%08llx\n", ptr); // TODO: size!
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_rbp = ptr;
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}
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for(i=1; i<MAXBT; i++) {
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// TODO: make those two reads in a shot
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bio->read_at (bio->io, _rbp, &ebp2, 4);
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bio->read_at (bio->io, _rbp+4, &ptr, 4);
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if (ptr == 0x0 || _rbp == 0x0)
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break;
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eprintf ("ADDR: 0x%08llx\n", ptr);
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_rbp = ebp2;
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}
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return i;
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return R_TRUE;
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}
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