mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 17:50:20 +00:00
70 lines
1.9 KiB
ArmAsm
70 lines
1.9 KiB
ArmAsm
/* Copy memory block and return pointer to following byte.
|
|
For Intel 80x86, x>=6.
|
|
This file is part of the GNU C Library.
|
|
Copyright (C) 1998, 1999, 2000, 2002, 2004 Free Software Foundation, Inc.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
|
|
|
|
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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <sysdep.h>
|
|
#include "asm-syntax.h"
|
|
#include "bp-sym.h"
|
|
#include "bp-asm.h"
|
|
|
|
#define PARMS LINKAGE /* no space for saved regs */
|
|
#define RTN PARMS
|
|
#define DEST RTN+RTN_SIZE
|
|
#define SRC DEST+PTR_SIZE
|
|
#define LEN SRC+PTR_SIZE
|
|
|
|
.text
|
|
#if defined PIC && !defined NOT_IN_libc
|
|
ENTRY (__mempcpy_chk)
|
|
movl 12(%esp), %eax
|
|
cmpl %eax, 16(%esp)
|
|
jb HIDDEN_JUMPTARGET (__chk_fail)
|
|
END (__mempcpy_chk)
|
|
#endif
|
|
ENTRY (BP_SYM (__mempcpy))
|
|
ENTER
|
|
|
|
movl LEN(%esp), %ecx
|
|
movl %edi, %eax
|
|
movl DEST(%esp), %edi
|
|
CHECK_BOUNDS_BOTH_WIDE (%edi, DEST(%esp), %ecx)
|
|
movl %esi, %edx
|
|
movl SRC(%esp), %esi
|
|
CHECK_BOUNDS_BOTH_WIDE (%esi, SRC(%esp), %ecx)
|
|
cld
|
|
shrl $1, %ecx
|
|
jnc 1f
|
|
movsb
|
|
1: shrl $1, %ecx
|
|
jnc 2f
|
|
movsw
|
|
2: rep
|
|
movsl
|
|
xchgl %edi, %eax
|
|
movl %edx, %esi
|
|
RETURN_BOUNDED_POINTER (DEST(%esp))
|
|
|
|
LEAVE
|
|
RET_PTR
|
|
END (BP_SYM (__mempcpy))
|
|
libc_hidden_def (BP_SYM (__mempcpy))
|
|
weak_alias (BP_SYM (__mempcpy), BP_SYM (mempcpy))
|
|
libc_hidden_builtin_def (mempcpy)
|