blob: d64e650800f583826a4de6e0f38fb3fdc411f022 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
/* Checking memcpy for x86-64.
Copyright (C) 2004-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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"
#ifndef SHARED
/* For libc.so this is defined in memcpy.S.
For libc.a, this is a separate source to avoid
memcpy bringing in __chk_fail and all routines
it calls. */
.text
ENTRY (__memcpy_chk)
cmpq %rdx, %rcx
jb __chk_fail
jmp memcpy
END (__memcpy_chk)
#endif
|
