efl/src/bin/evil/memcpy_glibc_i686.S

82 lines
2.1 KiB
ArmAsm
Executable File

/* Copy memory block and return pointer to beginning of destination block
For Intel 80x86, x>=6.
This file is part of the GNU C Library.
Copyright (C) 1999, 2000, 2003, 2004 Free Software Foundation, Inc.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
# define CHECK_BOUNDS_BOTH_WIDE(VAL_REG, BP_MEM, LENGTH) \
CHECK_BOUNDS_LOW(VAL_REG, BP_MEM); \
addl LENGTH, VAL_REG; \
cmpl 8+BP_MEM, VAL_REG; \
jbe 0f; /* continue if value <= high */ \
BOUNDS_VIOLATED; \
0: subl LENGTH, VAL_REG /* restore value */
# define RETURN_BOUNDED_POINTER(BP_MEM) \
movl RTN(%esp), %edx; \
movl %eax, 0(%edx); \
movl 4+BP_MEM, %eax; \
movl %eax, 4(%edx); \
movl 8+BP_MEM, %eax; \
movl %eax, 8(%edx)
#define PTR_SIZE 12
#define RTN_SIZE 4
#define LINKAGE 8
#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
.align
.global memcpy_glibc
.func memcpy_glibc
memcpy_glibc:
pushl %ebp
movl %esp, %ebp
movl LEN(%esp), %ecx
movl %edi, %eax
movl DEST(%esp), %edi
movl %esi, %edx
movl SRC(%esp), %esi
cld
shrl $1, %ecx
jnc 1f
movsb
1: shrl $1, %ecx
jnc 2f
movsw
2: rep
movsl
movl %eax, %edi
movl %edx, %esi
movl DEST(%esp), %eax
RETURN_BOUNDED_POINTER (DEST(%esp))
movl %ebp, %esp
popl %ebp
.endfunc