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ssp: add Object Size Checking for strings.h 

The implementation is from NetBSD, with the addition of explicit_bzero
for parity with glibc.

Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
This commit is contained in:
Yaakov Selkowitz 2017-11-27 23:21:35 -06:00
parent e4fc4d7bc4
commit a997f98b2a
2 changed files with 59 additions and 0 deletions
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55
newlib/libc/include/ssp/strings.h Normal file
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@ -0,0 +1,55 @@
/* $NetBSD: strings.h,v 1.3 2008/04/28 20:22:54 martin Exp $ */
/*-
* Copyright (c) 2007 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_STRINGS_H_
#define _SSP_STRINGS_H_
#include <ssp/ssp.h>
#if __SSP_FORTIFY_LEVEL > 0
#if __BSD_VISIBLE || __POSIX_VISIBLE <= 200112
#define bcopy(src, dst, len) \
((__ssp_bos0(dst) != (size_t)-1) ? \
__builtin___memmove_chk(dst, src, len, __ssp_bos0(dst)) : \
__memmove_ichk(dst, src, len))
#define bzero(dst, len) \
((__ssp_bos0(dst) != (size_t)-1) ? \
__builtin___memset_chk(dst, 0, len, __ssp_bos0(dst)) : \
__memset_ichk(dst, 0, len))
#endif
#if __BSD_VISIBLE
__ssp_redirect0(void, explicit_bzero, (void *__buf, size_t __len), \
(__buf, __len));
#endif
#endif /* __SSP_FORTIFY_LEVEL > 0 */
#endif /* _SSP_STRINGS_H_ */

4
newlib/libc/include/strings.h
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@ -73,4 +73,8 @@ int strncasecmp_l (const char *, const char *, size_t, locale_t);
#endif
__END_DECLS
#if __SSP_FORTIFY_LEVEL > 0
#include <ssp/strings.h>
#endif
#endif /* _STRINGS_H_ */