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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