mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-09 04:36:31 +00:00
be04fec426
This is a mostly-unmodified copy of the various *_chk implementations and headers from NetBSD, without yet modifying system headers to start actually including them. A future commit will also apply the needed bits to fix ssp/unistd.h. Reviewed by: imp, pauamma_gundo.com (both previous versions), kib Sponsored by: Stormshield Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D32306
92 lines
3.2 KiB
C
92 lines
3.2 KiB
C
/* $NetBSD: ssp.h,v 1.13 2015/09/03 20:43:47 plunky Exp $ */
|
|
|
|
/*-
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2006, 2011 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.
|
|
*
|
|
* 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 defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && \
|
|
(__OPTIMIZE__ > 0 || defined(__clang__))
|
|
# if _FORTIFY_SOURCE > 1
|
|
# define __SSP_FORTIFY_LEVEL 2
|
|
# else
|
|
# define __SSP_FORTIFY_LEVEL 1
|
|
# endif
|
|
# else
|
|
# define __SSP_FORTIFY_LEVEL 0
|
|
# endif
|
|
#else
|
|
# define __SSP_FORTIFY_LEVEL 0
|
|
#endif
|
|
|
|
#define __ssp_var(type) __CONCAT(__ssp_ ## type, __COUNTER__)
|
|
|
|
/* __ssp_real is used by the implementation in libc */
|
|
#if __SSP_FORTIFY_LEVEL == 0
|
|
#define __ssp_real_(fun) fun
|
|
#else
|
|
#define __ssp_real_(fun) __ssp_real_ ## fun
|
|
#endif
|
|
#define __ssp_real(fun) __ssp_real_(fun)
|
|
|
|
#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_check(buf, len, bos) \
|
|
if (bos(buf) != (size_t)-1 && len > bos(buf)) \
|
|
__chk_fail()
|
|
#define __ssp_redirect_raw(rtype, fun, symbol, args, call, cond, bos) \
|
|
rtype __ssp_real_(fun) args __RENAME(symbol); \
|
|
__ssp_inline rtype fun args __RENAME(__ssp_protected_ ## fun); \
|
|
__ssp_inline rtype fun args { \
|
|
if (cond) \
|
|
__ssp_check(__buf, __len, bos); \
|
|
return __ssp_real_(fun) call; \
|
|
}
|
|
|
|
#define __ssp_redirect(rtype, fun, args, call) \
|
|
__ssp_redirect_raw(rtype, fun, fun, args, call, 1, __ssp_bos)
|
|
#define __ssp_redirect0(rtype, fun, args, call) \
|
|
__ssp_redirect_raw(rtype, fun, fun, args, call, 1, __ssp_bos0)
|
|
|
|
__BEGIN_DECLS
|
|
void __stack_chk_fail(void) __dead2;
|
|
void __chk_fail(void) __dead2;
|
|
__END_DECLS
|
|
|
|
#endif /* _SSP_SSP_H_ */
|