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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/* Multiple versions of __memset_chk
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2010-2016 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. */
#if IS_IN (libc)
.text
ENTRY(__memset_chk)
.type __memset_chk, @gnu_indirect_function
LOAD_GOT_AND_RTLD_GLOBAL_RO
LOAD_FUNC_GOT_EAX (__memset_chk_ia32)
HAS_CPU_FEATURE (SSE2)
jz 2f
LOAD_FUNC_GOT_EAX (__memset_chk_sse2)
HAS_ARCH_FEATURE (Fast_Rep_String)
jz 2f
LOAD_FUNC_GOT_EAX (__memset_chk_sse2_rep)
2: ret
END(__memset_chk)
# ifdef SHARED
strong_alias (__memset_chk, __memset_zero_constant_len_parameter)
.section .gnu.warning.__memset_zero_constant_len_parameter
.string "memset used with constant zero length parameter; this could be due to transposed parameters"
# else
.text
.type __memset_chk_sse2, @function
.p2align 4;
__memset_chk_sse2:
cfi_startproc
CALL_MCOUNT
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb __chk_fail
jmp __memset_sse2
cfi_endproc
.size __memset_chk_sse2, .-__memset_chk_sse2
.type __memset_chk_sse2_rep, @function
.p2align 4;
__memset_chk_sse2_rep:
cfi_startproc
CALL_MCOUNT
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb __chk_fail
jmp __memset_sse2_rep
cfi_endproc
.size __memset_chk_sse2_rep, .-__memset_chk_sse2_rep
.type __memset_chk_ia32, @function
.p2align 4;
__memset_chk_ia32:
cfi_startproc
CALL_MCOUNT
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb __chk_fail
jmp __memset_ia32
cfi_endproc
.size __memset_chk_ia32, .-__memset_chk_ia32
# endif
#endif
|
