17c478bdstevel@tonic-gate/*
27c478bdstevel@tonic-gate * CDDL HEADER START
37c478bdstevel@tonic-gate *
47c478bdstevel@tonic-gate * The contents of this file are subject to the terms of the
57257d1braf * Common Development and Distribution License (the "License").
67257d1braf * You may not use this file except in compliance with the License.
77c478bdstevel@tonic-gate *
87c478bdstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bdstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bdstevel@tonic-gate * See the License for the specific language governing permissions
117c478bdstevel@tonic-gate * and limitations under the License.
127c478bdstevel@tonic-gate *
137c478bdstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bdstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bdstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bdstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bdstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bdstevel@tonic-gate *
197c478bdstevel@tonic-gate * CDDL HEADER END
207c478bdstevel@tonic-gate */
217257d1braf
227c478bdstevel@tonic-gate/*
2382333daSurya Prakki * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
247c478bdstevel@tonic-gate */
257c478bdstevel@tonic-gate
267c478bdstevel@tonic-gate/*	Copyright (c) 1988 AT&T	*/
277c478bdstevel@tonic-gate/*	  All Rights Reserved  	*/
287c478bdstevel@tonic-gate
297c478bdstevel@tonic-gate#if !defined(_KMDB) && !defined(_KERNEL)
307c478bdstevel@tonic-gate
317257d1braf#include "lint.h"
3282333daSurya Prakki
337c478bdstevel@tonic-gate#endif /* !_KMDB && !_KERNEL */
347c478bdstevel@tonic-gate
3582333daSurya Prakki/*
3682333daSurya Prakki * The SunStudio compiler may generate calls to _memmove; So we
3782333daSurya Prakki * need to make sure that the correct symbol exists for these calls.
3882333daSurya Prakki */
3982333daSurya Prakki#pragma weak _memmove = memmove
4082333daSurya Prakki
417c478bdstevel@tonic-gate#include <sys/types.h>
427c478bdstevel@tonic-gate
437c478bdstevel@tonic-gate#if defined(_KERNEL)
447c478bdstevel@tonic-gate#include <sys/systm.h>
457c478bdstevel@tonic-gate#else
467c478bdstevel@tonic-gate#include <string.h>
477c478bdstevel@tonic-gate#include <memory.h>
487c478bdstevel@tonic-gate#endif
497c478bdstevel@tonic-gate
507c478bdstevel@tonic-gate/*
517c478bdstevel@tonic-gate * Copy s0 to s, always copy n bytes.
527c478bdstevel@tonic-gate * Return s
537c478bdstevel@tonic-gate * Copying between objects that overlap will take place correctly
547c478bdstevel@tonic-gate */
557c478bdstevel@tonic-gatevoid *
567c478bdstevel@tonic-gatememmove(void *s, const void *s0, size_t n)
577c478bdstevel@tonic-gate{
587c478bdstevel@tonic-gate	if (n != 0) {
597c478bdstevel@tonic-gate		char *s1 = s;
607c478bdstevel@tonic-gate		const char *s2 = s0;
617c478bdstevel@tonic-gate
627c478bdstevel@tonic-gate		if (s1 <= s2) {
637c478bdstevel@tonic-gate			do {
647c478bdstevel@tonic-gate				*s1++ = *s2++;
657c478bdstevel@tonic-gate			} while (--n != 0);
667c478bdstevel@tonic-gate		} else {
677c478bdstevel@tonic-gate			s2 += n;
687c478bdstevel@tonic-gate			s1 += n;
697c478bdstevel@tonic-gate			do {
707c478bdstevel@tonic-gate				*--s1 = *--s2;
717c478bdstevel@tonic-gate			} while (--n != 0);
727c478bdstevel@tonic-gate		}
737c478bdstevel@tonic-gate	}
747c478bdstevel@tonic-gate	return (s);
757c478bdstevel@tonic-gate}
76