about summary refs log tree commit diff
path: root/sysdeps/i386/i686/multiarch/mempcpy_chk.S
blob: f846e955a106d61b5260bccbf0902cb8c142e422 (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
51
52
53
54
/* Multiple versions of __mempcpy_chk
   Copyright (C) 2010, 2012 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <sysdep.h>
#include <init-arch.h>

/* Define multiple versions only for the definition in lib and for
   DSO.  There are no multiarch mempcpy functions for static binaries.
 */
#ifndef NOT_IN_libc
# ifdef SHARED
	.text
ENTRY(__mempcpy_chk)
	.type	__mempcpy_chk, @gnu_indirect_function
	pushl	%ebx
	cfi_adjust_cfa_offset (4)
	cfi_rel_offset (ebx, 0)
	LOAD_PIC_REG(bx)
	cmpl	$0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
	jne	1f
	call	__init_cpu_features
1:	leal	__mempcpy_chk_ia32@GOTOFF(%ebx), %eax
	testl	$bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx)
	jz	2f
	leal	__mempcpy_chk_ssse3@GOTOFF(%ebx), %eax
	testl	$bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features@GOTOFF(%ebx)
	jz	2f
	leal	__mempcpy_chk_ssse3_rep@GOTOFF(%ebx), %eax
2:	popl	%ebx
	cfi_adjust_cfa_offset (-4)
	cfi_restore (ebx)
	ret
END(__mempcpy_chk)
# else
#  include "../mempcpy_chk.S"
# endif
#endif