about summary refs log tree commit diff
path: root/sysdeps/i386/i686/multiarch/memcpy_chk.S
blob: 1b4fbe2e6feaf4569929f4df344be388a608338f (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
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
/* Multiple versions of __memcpy_chk
   All versions must be listed in ifunc-impl-list.c.
   Copyright (C) 2010-2017 Free Software Foundation, Inc.
   Contributed by Intel Corporation.
   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 <init-arch.h>

/* Define multiple versions only for the definition in lib and for
   DSO.  There are no multiarch memcpy functions for static binaries.
 */
#if IS_IN (libc)
# ifdef SHARED
	.text
ENTRY(__memcpy_chk)
	.type	__memcpy_chk, @gnu_indirect_function
	LOAD_GOT_AND_RTLD_GLOBAL_RO
	LOAD_FUNC_GOT_EAX (__memcpy_chk_ia32)
	HAS_CPU_FEATURE (SSE2)
	jz	2f
	LOAD_FUNC_GOT_EAX (__memcpy_chk_sse2_unaligned)
	HAS_ARCH_FEATURE (Fast_Unaligned_Load)
	jnz	2f
	HAS_CPU_FEATURE (SSSE3)
	jz	2f
	LOAD_FUNC_GOT_EAX (__memcpy_chk_ssse3)
	HAS_ARCH_FEATURE (Fast_Rep_String)
	jz	2f
	LOAD_FUNC_GOT_EAX (__memcpy_chk_ssse3_rep)
2:	ret
END(__memcpy_chk)
# else
#  include "../memcpy_chk.S"
# endif
#endif