NetBSD/include/ssp/ssp.h

81 lines
3.3 KiB
C

/* $NetBSD: ssp.h,v 1.2 2007/06/03 17:41:19 christos Exp $ */
/*-
* Copyright (c) 2006 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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.
*/
#ifndef _SSP_SSP_H_
#define _SSP_SSP_H_
#include <sys/cdefs.h>
#if !defined(__cplusplus)
# if _FORTIFY_SOURCE > 0 && __OPTIMIZE__ > 0 && __GNUC_PREREQ__(4, 1)
# if _FORTIFY_SOURCE > 1
# define __SSP_FORTIFY_LEVEL 2
# else
# define __SSP_FORTIFY_LEVEL 1
# endif
# endif
#endif
#define __ssp_alias_name(fun) __ ## fun ## _alias
#ifdef _NAMESPACE_H_
#define __ssp_alias_func(fun, args) ___ ## fun ## _alias args
#else
#define __ssp_alias_func(fun, args) __ssp_alias_name(fun) args
#endif
#define __ssp_inline static __inline __attribute__((__always_inline__))
#define __ssp_bos(ptr) __builtin_object_size(ptr, __SSP_FORTIFY_LEVEL > 1)
#define __ssp_bos0(ptr) __builtin_object_size(ptr, 0)
#define __ssp_redirect_raw(rtype, fun, args, call, bos) \
__ssp_inline rtype __ssp_alias_name(fun) args; \
__ssp_inline rtype __ssp_alias_name(fun) args { \
if (bos(__buf) != (size_t)-1 && __len > bos(__buf)) \
__chk_fail(); \
return fun call; \
}
#define __ssp_redirect(rtype, fun, args, call) \
__ssp_redirect_raw(rtype, fun, args, call, __ssp_bos)
#define __ssp_redirect0(rtype, fun, args, call) \
__ssp_redirect_raw(rtype, fun, args, call, __ssp_bos0)
__BEGIN_DECLS
void __stack_chk_fail(void) __attribute__((__noreturn__));
void __chk_fail(void) __attribute__((__noreturn__));
__END_DECLS
#endif /* _SSP_SSP_H_ */