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// backtrace.h - Fallback backtrace implementation. i386 implementation.
/* Copyright (C) 2005 Free Software Foundation
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
#ifndef __SYSDEP_BACKTRACE_H__
#define __SYSDEP_BACKTRACE_H__
#include <java-stack.h>
#define HAVE_FALLBACK_BACKTRACE
/* Store return addresses of the current program stack in
STATE and return the exact number of values stored. */
void
fallback_backtrace (_Jv_UnwindState *state)
{
register void *_ebp __asm__ ("ebp");
register void *_esp __asm__ ("esp");
unsigned int *rfp;
int i = state->pos;
for (rfp = *(unsigned int**)_ebp;
rfp && i < state->length;
rfp = *(unsigned int **)rfp)
{
int diff = *rfp - (unsigned int)rfp;
if ((void*)rfp < _esp || diff > 4 * 1024 || diff < 0)
break;
state->frames[i].type = frame_native;
state->frames[i].ip = (void*)(rfp[1]-4);
i++;
}
state->pos = i;
}
#endif
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