1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 /* 33 * The SunStudio compiler may generate calls to _memcpy and so we 34 * need to make sure that the correct symbol exists for these calls, 35 * whether it be libc (first case below) or the kernel (second case). 36 */ 37 38 #if !defined(_KMDB) && !defined(_BOOT) && !defined(_KERNEL) 39 40 #include "lint.h" 41 42 #endif /* !_KMDB && !_BOOT && !_KERNEL */ 43 44 #pragma weak _memcpy = memcpy 45 46 #include <sys/types.h> 47 48 #if defined(_KERNEL) 49 #include <sys/systm.h> 50 #elif !defined(_BOOT) 51 #include <stddef.h> 52 #include <string.h> 53 #endif 54 55 #include "memcpy.h" 56 57 /* 58 * Copy s0 to s, always copy n bytes. 59 * Return s 60 */ 61 void * 62 memcpy(void *s, const void *s0, size_t n) 63 { 64 if (n != 0) { 65 char *s1 = s; 66 const char *s2 = s0; 67 68 do { 69 *s1++ = *s2++; 70 } while (--n != 0); 71 } 72 return (s); 73 } 74