minix/lib/csu/common_elf/dwarf2_eh.h

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