blob: 75fe9b8544afcf2e7852ad80f2b21dac2dfe1d62 (
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
60
61
62
63
|
/* Multiple versions of bzero.
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2015 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/>. */
/* Define multiple versions only for the definition in lib. */
#if IS_IN (libc)
/* Redefine bzero so that the compiler won't complain about the type
mismatch with the IFUNC selector in strong_alias, below. */
# undef bzero
# define bzero __redirect_bzero
# include <string.h>
# undef bzero
# include <init-arch.h>
extern __typeof (__redirect_bzero) __bzero_i386 attribute_hidden;
extern __typeof (__redirect_bzero) __bzero_i586 attribute_hidden;
extern __typeof (__redirect_bzero) __bzero_i686 attribute_hidden;
extern __typeof (__redirect_bzero) __bzero_sse2 attribute_hidden;
extern __typeof (__redirect_bzero) __bzero_sse2_rep attribute_hidden;
/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
ifunc symbol properly. */
extern __typeof (__redirect_bzero) __bzero;
extern void *bzero_ifunc (void) __asm__ ("__bzero");
void *
bzero_ifunc (void)
{
if (HAS_CPU_FEATURE (SSE2))
{
if (HAS_ARCH_FEATURE (Fast_Rep_String))
return __bzero_sse2_rep;
else
return __bzero_sse2;
}
if (USE_I686)
return __bzero_i686;
else if (USE_I586)
return __bzero_i586;
else
return __bzero_i386;
}
__asm__ (".type __bzero, %gnu_indirect_function");
weak_alias (__bzero, bzero)
#endif
|
