17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
57257d1b4Sraf * Common Development and Distribution License (the "License").
67257d1b4Sraf * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate *
87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate * and limitations under the License.
127c478bd9Sstevel@tonic-gate *
137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate *
197c478bd9Sstevel@tonic-gate * CDDL HEADER END
207c478bd9Sstevel@tonic-gate */
217257d1b4Sraf
227c478bd9Sstevel@tonic-gate /*
23*82333da9SSurya Prakki * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
247c478bd9Sstevel@tonic-gate */
257c478bd9Sstevel@tonic-gate
267c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */
277c478bd9Sstevel@tonic-gate /* All Rights Reserved */
287c478bd9Sstevel@tonic-gate
297c478bd9Sstevel@tonic-gate #if !defined(_KMDB) && !defined(_KERNEL)
307c478bd9Sstevel@tonic-gate
317257d1b4Sraf #include "lint.h"
32*82333da9SSurya Prakki
337c478bd9Sstevel@tonic-gate #endif /* !_KMDB && !_KERNEL */
347c478bd9Sstevel@tonic-gate
35*82333da9SSurya Prakki /*
36*82333da9SSurya Prakki * The SunStudio compiler may generate calls to _memmove; So we
37*82333da9SSurya Prakki * need to make sure that the correct symbol exists for these calls.
38*82333da9SSurya Prakki */
39*82333da9SSurya Prakki #pragma weak _memmove = memmove
40*82333da9SSurya Prakki
417c478bd9Sstevel@tonic-gate #include <sys/types.h>
427c478bd9Sstevel@tonic-gate
437c478bd9Sstevel@tonic-gate #if defined(_KERNEL)
447c478bd9Sstevel@tonic-gate #include <sys/systm.h>
457c478bd9Sstevel@tonic-gate #else
467c478bd9Sstevel@tonic-gate #include <string.h>
477c478bd9Sstevel@tonic-gate #include <memory.h>
487c478bd9Sstevel@tonic-gate #endif
497c478bd9Sstevel@tonic-gate
507c478bd9Sstevel@tonic-gate /*
517c478bd9Sstevel@tonic-gate * Copy s0 to s, always copy n bytes.
527c478bd9Sstevel@tonic-gate * Return s
537c478bd9Sstevel@tonic-gate * Copying between objects that overlap will take place correctly
547c478bd9Sstevel@tonic-gate */
557c478bd9Sstevel@tonic-gate void *
memmove(void * s,const void * s0,size_t n)567c478bd9Sstevel@tonic-gate memmove(void *s, const void *s0, size_t n)
577c478bd9Sstevel@tonic-gate {
587c478bd9Sstevel@tonic-gate if (n != 0) {
597c478bd9Sstevel@tonic-gate char *s1 = s;
607c478bd9Sstevel@tonic-gate const char *s2 = s0;
617c478bd9Sstevel@tonic-gate
627c478bd9Sstevel@tonic-gate if (s1 <= s2) {
637c478bd9Sstevel@tonic-gate do {
647c478bd9Sstevel@tonic-gate *s1++ = *s2++;
657c478bd9Sstevel@tonic-gate } while (--n != 0);
667c478bd9Sstevel@tonic-gate } else {
677c478bd9Sstevel@tonic-gate s2 += n;
687c478bd9Sstevel@tonic-gate s1 += n;
697c478bd9Sstevel@tonic-gate do {
707c478bd9Sstevel@tonic-gate *--s1 = *--s2;
717c478bd9Sstevel@tonic-gate } while (--n != 0);
727c478bd9Sstevel@tonic-gate }
737c478bd9Sstevel@tonic-gate }
747c478bd9Sstevel@tonic-gate return (s);
757c478bd9Sstevel@tonic-gate }
76