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 (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 /* Copyright (c) 1988 AT&T */ 27 /* All Rights Reserved */ 28 29 #if !defined(_KMDB) && !defined(_KERNEL) 30 31 #include "lint.h" 32 33 #endif /* !_KMDB && !_KERNEL */ 34 35 /* 36 * The SunStudio compiler may generate calls to _memmove; So we 37 * need to make sure that the correct symbol exists for these calls. 38 */ 39 #pragma weak _memmove = memmove 40 41 #include <sys/types.h> 42 43 #if defined(_KERNEL) 44 #include <sys/systm.h> 45 #else 46 #include <string.h> 47 #include <memory.h> 48 #endif 49 50 /* 51 * Copy s0 to s, always copy n bytes. 52 * Return s 53 * Copying between objects that overlap will take place correctly 54 */ 55 void * 56 memmove(void *s, const void *s0, size_t n) 57 { 58 if (n != 0) { 59 char *s1 = s; 60 const char *s2 = s0; 61 62 if (s1 <= s2) { 63 do { 64 *s1++ = *s2++; 65 } while (--n != 0); 66 } else { 67 s2 += n; 68 s1 += n; 69 do { 70 *--s1 = *--s2; 71 } while (--n != 0); 72 } 73 } 74 return (s); 75 } 76