mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 21:10:07 +00:00
c8a0e6ec03
__memset_zero_constant_len_parameter should be removed by
commit 61062f5630
Author: Ulrich Drepper <drepper@redhat.com>
Date: Tue Mar 1 00:35:23 2005 +0000
2005-02-24 Roland McGrath <roland@redhat.com>
* debug/Versions (libc: GLIBC_2.4): Remove
__memset_zero_constant_len_parameter.
* sysdeps/generic/memset_chk.c: Remove alias and warning.
* misc/sys/cdefs.h (__warndecl): New macro.
* debug/warning-nop.c: New file.
* string/bits/string3.h (memset): Call __warn_memset_zero_len with no
arguments, instead of calling __memset_zero_constant_len_parameter.
Use __warndecl for __warn_memset_zero_len.
* debug/Makefile (routines): Add $(static-only-routines).
(static-only-routines): New variable.
This patch removes the last emaining pieces of it. Tested it on i586,
i686 and x86-64.
[BZ #21790]
* sysdeps/i386/i586/memset.S
(__memset_zero_constant_len_parameter): Removed.
* sysdeps/i386/i686/memset.S
(__memset_zero_constant_len_parameter): Likewise.
* sysdeps/i386/i686/multiarch/memset_chk.S
(__memset_zero_constant_len_parameter): Likewise.
* sysdeps/x86_64/memset.S (__memset_zero_constant_len_parameter):
Likewise.
94 lines
2.3 KiB
ArmAsm
94 lines
2.3 KiB
ArmAsm
/* memset/bzero -- set memory area to CH/0
|
|
Highly optimized version for ix86, x>=6.
|
|
Copyright (C) 1999-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include "asm-syntax.h"
|
|
|
|
#define PARMS 4+4 /* space for 1 saved reg */
|
|
#ifdef USE_AS_BZERO
|
|
# define DEST PARMS
|
|
# define LEN DEST+4
|
|
#else
|
|
# define RTN PARMS
|
|
# define DEST RTN
|
|
# define CHR DEST+4
|
|
# define LEN CHR+4
|
|
#endif
|
|
|
|
.text
|
|
#if defined SHARED && IS_IN (libc) && !defined USE_AS_BZERO
|
|
ENTRY_CHK (__memset_chk)
|
|
movl 12(%esp), %eax
|
|
cmpl %eax, 16(%esp)
|
|
jb HIDDEN_JUMPTARGET (__chk_fail)
|
|
END_CHK (__memset_chk)
|
|
#endif
|
|
ENTRY (memset)
|
|
|
|
cld
|
|
pushl %edi
|
|
cfi_adjust_cfa_offset (4)
|
|
movl DEST(%esp), %edx
|
|
movl LEN(%esp), %ecx
|
|
#ifdef USE_AS_BZERO
|
|
xorl %eax, %eax /* fill with 0 */
|
|
#else
|
|
movzbl CHR(%esp), %eax
|
|
#endif
|
|
jecxz 1f
|
|
movl %edx, %edi
|
|
cfi_rel_offset (edi, 0)
|
|
andl $3, %edx
|
|
jz 2f /* aligned */
|
|
jp 3f /* misaligned at 3, store just one byte below */
|
|
stosb /* misaligned at 1 or 2, store two bytes */
|
|
decl %ecx
|
|
jz 1f
|
|
3: stosb
|
|
decl %ecx
|
|
jz 1f
|
|
xorl $1, %edx
|
|
jnz 2f /* was misaligned at 2 or 3, now aligned */
|
|
stosb /* was misaligned at 1, store third byte */
|
|
decl %ecx
|
|
2: movl %ecx, %edx
|
|
shrl $2, %ecx
|
|
andl $3, %edx
|
|
#ifndef USE_AS_BZERO
|
|
imul $0x01010101, %eax
|
|
#endif
|
|
rep
|
|
stosl
|
|
movl %edx, %ecx
|
|
rep
|
|
stosb
|
|
|
|
1:
|
|
#ifndef USE_AS_BZERO
|
|
movl DEST(%esp), %eax /* start address of destination is result */
|
|
#endif
|
|
popl %edi
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (edi)
|
|
|
|
ret
|
|
END (memset)
|
|
libc_hidden_builtin_def (memset)
|