/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
/*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
*/
#include <i386/asm.h>
/*
* void *secure_memset(void * addr, int pattern, size_t length)
*
* It is important that this function remains defined in assembly to avoid
* compiler optimizations.
*/
ENTRY(secure_memset)
/*
* void *memset(void * addr, int pattern, size_t length)
*/
/* TODO: add variants for use with non-cacheable ranges */
ENTRY(memset)
movq %rdi, %r8
movq %rsi, %rax /* move pattern (arg2) to rax */
movq %rdx, %rcx /* mov bytes */
cld /* reset direction flag */
rep
stosb
movq %r8 ,%rax /* returns its first argument */
ret
/*
* void *memset_word(void * addr, int pattern, size_t length)
*/
ENTRY(memset_word)
movq %rdi, %r8
movq %rsi, %rax /* move pattern (arg2) to rax */
mov %eax, %ecx
shlq $32,%rax
orq %rcx, %rax
cld /* reset direction flag */
movq %rdx, %rcx /* mov quads first */
shrq $1, %rcx
rep
stosq
movq %rdx,%rcx /* if necessary, mov 32 bit word */
andq $1,%rcx
rep
stosl
movq %r8 ,%rax /* returns its first argument */
ret
/*
* void bzero(char * addr, size_t length)
*/
Entry(blkclr)
ENTRY2(bzero,__bzero)
movq %rsi,%rcx
xor %eax,%eax
cld
rep
stosb
ret