71 lines
2.8 KiB
C
71 lines
2.8 KiB
C
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/* $NetBSD: dwarf2_eh.h,v 1.3 2008/04/28 20:22:54 martin Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Definitions for DWARF2 stack frame unwinding/exception handling.
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*/
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#ifdef __GNUC__
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/*
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* We must pass a DWARF2 unwind object to __register_frame_info().
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* Since we don't reference any members of this object, but rather
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* only provide storage for it, we just declare it in a simple,
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* dumb way. We need room for 6 pointers in GCC 2.95.3 and GCC 3.0,
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* but declare it with a little slop at the end.
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*/
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struct dwarf2_eh_object {
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void *space[8];
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};
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/*
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* These routines are provided by libgcc to register/unregister
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* frame info. Note these prototypes must generate weak references
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* (even though the routines in libgcc have strong definitions).
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* This is so that we can link with a libgcc that doesn't have these
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* routines (e.g. one that uses sjlj exceptions).
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*/
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/*
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* A few platforms (x86_64, s390) have read-only .eh_frame by default,
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* so they must have it declared 'const'. These platforms will override
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* __EH_FRAME_CONST (which is empty by default) in their CPP flags.
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*/
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#ifndef __EH_FRAME_CONST
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#define __EH_FRAME_CONST
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#endif
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extern void __register_frame_info(__EH_FRAME_CONST void *,
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struct dwarf2_eh_object *) __attribute__((weak));
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extern void __deregister_frame_info(__EH_FRAME_CONST void *)
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__attribute__((weak));
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#endif /* __GNUC__ */
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