/*- * Copyright (c) 2012 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Alan Barrett * * 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. */ /* * ISO/IEC 9899:2011 section K.3.7.4.1 The memset_s function */ #include "sgx_memset_s.h" #include #include #include /* * __memset_vp is a volatile pointer to a function. * It is initialised to point to memset, and should never be changed. */ static void * (* const volatile __memset_vp)(void *, int, size_t) = (memset); #ifdef memset_s #undef memset_s /* in case it was defined as a macro */ #endif #ifdef __cplusplus extern "C" #endif int memset_s(void *s, size_t smax, int c, size_t n) { int err = 0; if (s == NULL) { err = EINVAL; goto out; } if (n > smax) { err = EOVERFLOW; n = smax; } /* Calling through a volatile pointer should never be optimised away. */ (*__memset_vp)(s, c, n); out: if (err == 0) return 0; else { errno = err; /* XXX call runtime-constraint handler */ return err; } }