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ssp: add Object Size Checking for unistd.h, part 1 

The implementation is from NetBSD, with the addition of feature test macros
for readlink.  glibc also wraps the following functions:
confstr, getdomainname, getgroups, gethostname, getlogin_r, getwd, pread,
readlinkat, ttyname_r.

Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
This commit is contained in:
Yaakov Selkowitz 2017-11-27 23:49:18 -06:00
parent 576093d46b
commit 6b02865d80
2 changed files with 58 additions and 0 deletions
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53
newlib/libc/include/ssp/unistd.h Normal file
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@ -0,0 +1,53 @@
/* $NetBSD: unistd.h,v 1.7 2015/06/25 18:41:03 joerg 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.
*
* 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_UNISTD_H_
#define _SSP_UNISTD_H_
#include <ssp/ssp.h>
#if __SSP_FORTIFY_LEVEL > 0
__BEGIN_DECLS
__ssp_redirect0(_READ_WRITE_RETURN_TYPE, read, \
(int __fd, void *__buf, size_t __len), (__fd, __buf, __len));
#if __BSD_VISIBLE || __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE >= 4
__ssp_redirect(ssize_t, readlink, (const char *__restrict __path, \
char *__restrict __buf, size_t __len), (__path, __buf, __len));
#endif
__ssp_redirect_raw(char *, getcwd, (char *__buf, size_t __len),
(__buf, __len), __buf != 0, __ssp_bos);
__END_DECLS
#endif /* __SSP_FORTIFY_LEVEL > 0 */
#endif /* _SSP_UNISTD_H_ */

5
newlib/libc/include/sys/unistd.h
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@ -567,4 +567,9 @@ int _EXFUN(unlinkat, (int, const char *, int));
#ifdef __cplusplus
}
#endif
#if __SSP_FORTIFY_LEVEL > 0
#include <ssp/unistd.h>
#endif
#endif /* _SYS_UNISTD_H */