about summary refs log tree commit diff
path: root/sysdeps/x86_64/multiarch/memmove.c
blob: d6bdab4ccf8a0943a76f85e135d824e202f6c4a0 (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
55
56
57
58
59
/* Multiple versions of memmove.
   Copyright (C) 2010-2012 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/>.  */

#ifndef NOT_IN_libc
# define MEMMOVE __memmove_sse2
# ifdef SHARED
#  undef libc_hidden_builtin_def
#  define libc_hidden_builtin_def(name) \
  __hidden_ver1 (__memmove_sse2, __GI_memmove, __memmove_sse2);
# endif

/* Redefine memmove so that the compiler won't complain about the type
   mismatch with the IFUNC selector in strong_alias, below.  */
# undef memmove
# define memmove __redirect_memmove
# include <string.h>
# undef memmove

extern __typeof (__redirect_memmove) __memmove_sse2 attribute_hidden;
extern __typeof (__redirect_memmove) __memmove_ssse3 attribute_hidden;
extern __typeof (__redirect_memmove) __memmove_ssse3_back attribute_hidden;
#endif

#include "string/memmove.c"

#ifndef NOT_IN_libc
# include <shlib-compat.h>
# include "init-arch.h"

/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
   ifunc symbol properly.  */
extern __typeof (__redirect_memmove) __libc_memmove;
libc_ifunc (__libc_memmove,
	    HAS_SSSE3
	    ? (HAS_FAST_COPY_BACKWARD
	       ? __memmove_ssse3_back : __memmove_ssse3)
	    : __memmove_sse2)

strong_alias (__libc_memmove, memmove)

# if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14)
compat_symbol (libc, memmove, memcpy, GLIBC_2_2_5);
# endif
#endif