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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/* Copyright (C) 2002, 2003, 2005, 2007, 2008 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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 <pthread-errnos.h>
#include <structsem.h>
#include <lowlevellock.h>
.text
.globl sem_post
.type sem_post,@function
.align 16
sem_post:
cfi_startproc
pushl %ebx
cfi_adjust_cfa_offset(4)
cfi_offset(%ebx, -8)
movl 8(%esp), %ebx
#if VALUE == 0
movl (%ebx), %eax
#else
movl VALUE(%ebx), %eax
#endif
0: cmpl $SEM_VALUE_MAX, %eax
je 3f
leal 1(%eax), %edx
LOCK
#if VALUE == 0
cmpxchgl %edx, (%ebx)
#else
cmpxchgl %edx, VALUE(%ebx)
#endif
jnz 0b
cmpl $0, NWAITERS(%ebx)
je 2f
movl $FUTEX_WAKE, %ecx
orl PRIVATE(%ebx), %ecx
movl $1, %edx
movl $SYS_futex, %eax
ENTER_KERNEL
testl %eax, %eax
js 1f
2: xorl %eax, %eax
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
ret
cfi_adjust_cfa_offset(4)
cfi_offset(%ebx, -8)
1:
#ifdef __PIC__
call __x86.get_pc_thunk.bx
#else
movl $4f, %ebx
4:
#endif
addl $_GLOBAL_OFFSET_TABLE_, %ebx
#if USE___THREAD
# ifdef NO_TLS_DIRECT_SEG_REFS
movl errno@gotntpoff(%ebx), %edx
addl %gs:0, %edx
movl $EINVAL, (%edx)
# else
movl errno@gotntpoff(%ebx), %edx
movl $EINVAL, %gs:(%edx)
# endif
#else
call __errno_location@plt
movl $EINVAL, (%eax)
#endif
orl $-1, %eax
popl %ebx
ret
3:
#ifdef __PIC__
call __x86.get_pc_thunk.bx
#else
movl $5f, %ebx
5:
#endif
addl $_GLOBAL_OFFSET_TABLE_, %ebx
#if USE___THREAD
# ifdef NO_TLS_DIRECT_SEG_REFS
movl errno@gotntpoff(%ebx), %edx
addl %gs:0, %edx
movl $EOVERFLOW, (%edx)
# else
movl errno@gotntpoff(%ebx), %edx
movl $EOVERFLOW, %gs:(%edx)
# endif
#else
call __errno_location@plt
movl $EOVERFLOW, (%eax)
#endif
orl $-1, %eax
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
ret
cfi_endproc
.size sem_post,.-sem_post
#ifdef __PIC__
.section .gnu.linkonce.t.__x86.get_pc_thunk.bx,"ax",@progbits
.globl __x86.get_pc_thunk.bx
.hidden __x86.get_pc_thunk.bx
.type __x86.get_pc_thunk.bx,@function
__x86.get_pc_thunk.bx:
movl (%esp), %ebx;
ret
.size __x86.get_pc_thunk.bx,.-__x86.get_pc_thunk.bx
#endif
|
