f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
86 lines
3 KiB
C
86 lines
3 KiB
C
/* $NetBSD: ssp.h,v 1.10 2012/08/08 20:23:32 joerg Exp $ */
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/*-
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* Copyright (c) 2006, 2011 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 Christos Zoulas.
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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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#ifndef _SSP_SSP_H_
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#define _SSP_SSP_H_
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#include <sys/cdefs.h>
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#if !defined(__cplusplus)
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# if _FORTIFY_SOURCE > 0 && !defined(__lint__) && \
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(__OPTIMIZE__ > 0 || defined(__clang__)) && __GNUC_PREREQ__(4, 1)
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# if _FORTIFY_SOURCE > 1
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# define __SSP_FORTIFY_LEVEL 2
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# else
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# define __SSP_FORTIFY_LEVEL 1
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# endif
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# else
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# define __SSP_FORTIFY_LEVEL 0
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# endif
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#else
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# define __SSP_FORTIFY_LEVEL 0
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#endif
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/* __ssp_real is used by the implementation in libc */
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#if __SSP_FORTIFY_LEVEL == 0
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#define __ssp_real_(fun) fun
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#else
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#define __ssp_real_(fun) __ssp_real_ ## fun
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#endif
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#define __ssp_real(fun) __ssp_real_(fun)
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#define __ssp_inline static __inline __attribute__((__always_inline__))
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#define __ssp_bos(ptr) __builtin_object_size(ptr, __SSP_FORTIFY_LEVEL > 1)
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#define __ssp_bos0(ptr) __builtin_object_size(ptr, 0)
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#define __ssp_check(buf, len, bos) \
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if (bos(buf) != (size_t)-1 && len > bos(buf)) \
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__chk_fail()
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#define __ssp_redirect_raw(rtype, fun, symbol, args, call, bos) \
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rtype __ssp_real_(fun) args __RENAME(symbol); \
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__ssp_inline rtype fun args __RENAME(__ssp_protected_ ## fun); \
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__ssp_inline rtype fun args { \
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__ssp_check(__buf, __len, bos); \
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return __ssp_real_(fun) call; \
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}
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#define __ssp_redirect(rtype, fun, args, call) \
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__ssp_redirect_raw(rtype, fun, fun, args, call, __ssp_bos)
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#define __ssp_redirect0(rtype, fun, args, call) \
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__ssp_redirect_raw(rtype, fun, fun, args, call, __ssp_bos0)
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__BEGIN_DECLS
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void __stack_chk_fail(void) __dead;
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void __chk_fail(void) __dead;
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__END_DECLS
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#endif /* _SSP_SSP_H_ */
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