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