1*0a6a1f1dSLionel Sambuc /* $NetBSD: memcpy_chk.c,v 1.7 2015/05/13 19:57:16 joerg Exp $ */
22fe8fb19SBen Gras
32fe8fb19SBen Gras /*-
42fe8fb19SBen Gras * Copyright (c) 2006 The NetBSD Foundation, Inc.
52fe8fb19SBen Gras * All rights reserved.
62fe8fb19SBen Gras *
72fe8fb19SBen Gras * This code is derived from software contributed to The NetBSD Foundation
82fe8fb19SBen Gras * by Christos Zoulas.
92fe8fb19SBen Gras *
102fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without
112fe8fb19SBen Gras * modification, are permitted provided that the following conditions
122fe8fb19SBen Gras * are met:
132fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright
142fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer.
152fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright
162fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the
172fe8fb19SBen Gras * documentation and/or other materials provided with the distribution.
182fe8fb19SBen Gras *
192fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
202fe8fb19SBen Gras * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
212fe8fb19SBen Gras * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
222fe8fb19SBen Gras * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
232fe8fb19SBen Gras * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
242fe8fb19SBen Gras * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
252fe8fb19SBen Gras * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
262fe8fb19SBen Gras * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
272fe8fb19SBen Gras * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
282fe8fb19SBen Gras * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
292fe8fb19SBen Gras * POSSIBILITY OF SUCH DAMAGE.
302fe8fb19SBen Gras */
312fe8fb19SBen Gras #include <sys/cdefs.h>
32*0a6a1f1dSLionel Sambuc __RCSID("$NetBSD: memcpy_chk.c,v 1.7 2015/05/13 19:57:16 joerg Exp $");
332fe8fb19SBen Gras
342fe8fb19SBen Gras /*LINTLIBRARY*/
352fe8fb19SBen Gras
362fe8fb19SBen Gras #include <ssp/ssp.h>
372fe8fb19SBen Gras #include <string.h>
382fe8fb19SBen Gras
39f14fb602SLionel Sambuc #undef memcpy
40f14fb602SLionel Sambuc
41*0a6a1f1dSLionel Sambuc void *__memcpy_chk(void * __restrict, const void * __restrict, size_t, size_t);
42*0a6a1f1dSLionel Sambuc
432fe8fb19SBen Gras void *
__memcpy_chk(void * __restrict dst,const void * __restrict src,size_t len,size_t slen)442fe8fb19SBen Gras __memcpy_chk(void * __restrict dst, const void * __restrict src, size_t len,
452fe8fb19SBen Gras size_t slen)
462fe8fb19SBen Gras {
472fe8fb19SBen Gras if (len > slen)
482fe8fb19SBen Gras __chk_fail();
49*0a6a1f1dSLionel Sambuc
50*0a6a1f1dSLionel Sambuc if (__ssp_overlap((const char *)src, (const char *)dst, len))
51*0a6a1f1dSLionel Sambuc __chk_fail();
52*0a6a1f1dSLionel Sambuc
532fe8fb19SBen Gras return memcpy(dst, src, len);
542fe8fb19SBen Gras }
55