1 /*
2 Copyright (c) 2006 The NetBSD Foundation, Inc.
3 All rights reserved.
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions
7 are met:
8 1. Redistributions of source code must retain the above copyright
9 notice, this list of conditions and the following disclaimer.
10 2. Redistributions in binary form must reproduce the above copyright
11 notice, this list of conditions and the following disclaimer in the
12 documentation and/or other materials provided with the distribution.
13
14 THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
15 AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
16 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
18 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 POSSIBILITY OF SUCH DAMAGE.
25 */
26 #define _GNU_SOURCE
27 #include <sys/cdefs.h>
28 #include <ssp/ssp.h>
29 #include <string.h>
30
31 #undef mempcpy
32
33 void *__mempcpy_chk(void * __restrict, const void * __restrict, size_t, size_t);
34
35 void *
__mempcpy_chk(void * __restrict dst,const void * __restrict src,size_t len,size_t slen)36 __mempcpy_chk(void * __restrict dst, const void * __restrict src, size_t len,
37 size_t slen)
38 {
39 if (len > slen)
40 __chk_fail();
41
42 if (__ssp_overlap((const char *)src, (const char *)dst, len))
43 __chk_fail();
44
45 return mempcpy(dst, src, len);
46 }
47
