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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/* Copyright (C) 2003-2014 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/>. */
#include <sysdep.h>
#include <shlib-compat.h>
#include <pthread-errnos.h>
#include <tcb-offsets.h>
#include <structsem.h>
#include <lowlevellock.h>
#include "lowlevel-atomic.h"
#if VALUE != 0
# error "code needs to be rewritten for VALUE != 0"
#endif
.text
.globl __new_sem_wait
.type __new_sem_wait,@function
.align 5
cfi_startproc
__new_sem_wait:
.LSTARTCODE:
#ifdef SHARED
cfi_personality(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect,
DW.ref.__gcc_personality_v0)
cfi_lsda(DW_EH_PE_pcrel | DW_EH_PE_sdata4, .LexceptSTART)
#else
cfi_personality(DW_EH_PE_absptr, __gcc_personality_v0)
cfi_lsda(DW_EH_PE_absptr, .LexceptSTART)
#endif
mov.l r8, @-r15
cfi_adjust_cfa_offset (4)
cfi_rel_offset (r8, 0)
mov.l r10, @-r15
cfi_adjust_cfa_offset (4)
cfi_rel_offset (r10, 0)
mov.l r12, @-r15
cfi_adjust_cfa_offset (4)
cfi_rel_offset (r12, 0)
sts.l pr, @-r15
cfi_adjust_cfa_offset (4)
cfi_rel_offset (pr, 0)
mov r4, r8
mov.l @r8, r0
2:
tst r0, r0
bt 1f
mov r0, r3
mov r0, r4
add #-1, r3
CMPXCHG (r4, @r8, r3, r2)
bf/s 2b
mov r2, r0
7:
mov #0, r0
9:
cfi_remember_state
lds.l @r15+, pr
cfi_adjust_cfa_offset (-4)
cfi_restore (pr)
mov.l @r15+, r12
cfi_adjust_cfa_offset (-4)
cfi_restore (r12)
mov.l @r15+, r10
cfi_adjust_cfa_offset (-4)
cfi_restore (r10)
rts
mov.l @r15+, r8
/* Omit CFI for restore in delay slot. */
cfi_restore_state
.Lafter_ret:
1:
INC (@(NWAITERS,r8),r2)
.LcleanupSTART:
6:
mov.l .Lenable0, r1
bsrf r1
nop
.Lenable0b:
mov r0, r10
mov r8, r4
#if FUTEX_WAIT == 0
mov.l @(PRIVATE,r8), r5
#else
mov.l @(PRIVATE,r8), r5
mov #FUTEX_WAIT, r0
or r0, r5
#endif
mov #0, r6
mov #0, r7
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
mov.l .Ldisable0, r1
mov r10, r4
bsrf r1
mov r0, r10
.Ldisable0b:
mov r10, r0
.LcleanupEND:
tst r0, r0
bt 3f
cmp/eq #-EWOULDBLOCK, r0
bf 4f
3:
mov.l @r8, r0
5:
tst r0, r0
bt 6b
mov r0, r3
mov r0, r4
add #-1, r3
CMPXCHG (r4, @r8, r3, r2)
bf/s 5b
mov r2, r0
DEC (@(NWAITERS,r8), r2)
bra 7b
nop
4:
neg r0, r0
mov r0, r4
DEC (@(NWAITERS,r8), r2)
mov r4, r8
mova .Lgot0, r0
mov.l .Lgot0, r12
add r0, r12
mov.l .Lerrno0, r0
stc gbr, r1
mov.l @(r0, r12), r0
bra .Lexit
add r1, r0
.align 2
.Lerrno0:
.long errno@GOTTPOFF
.Lexit:
mov.l r8, @r0
bra 9b
mov #-1, r0
.align 2
.Lgot0:
.long _GLOBAL_OFFSET_TABLE_
.Lenable0:
.long __pthread_enable_asynccancel-.Lenable0b
.Ldisable0:
.long __pthread_disable_asynccancel-.Ldisable0b
.size __new_sem_wait,.-__new_sem_wait
versioned_symbol(libpthread, __new_sem_wait, sem_wait, GLIBC_2_1)
.type sem_wait_cleanup,@function
sem_wait_cleanup:
DEC (@(NWAITERS,r8), r2)
.LcallUR:
mov.l .Lresume, r1
#ifdef PIC
add r12, r1
#endif
jsr @r1
nop
sleep
.align 2
.Lresume:
#ifdef PIC
.long _Unwind_Resume@GOTOFF
#else
.long _Unwind_Resume
#endif
.LENDCODE:
cfi_endproc
.size sem_wait_cleanup,.-sem_wait_cleanup
.section .gcc_except_table,"a",@progbits
.LexceptSTART:
.byte DW_EH_PE_omit ! @LPStart format (omit)
.byte DW_EH_PE_omit ! @TType format (omit)
.byte DW_EH_PE_uleb128 ! call-site format
.uleb128 .Lcstend-.Lcstbegin
.Lcstbegin:
.uleb128 .LcleanupSTART-.LSTARTCODE
.uleb128 .LcleanupEND-.LcleanupSTART
.uleb128 sem_wait_cleanup-.LSTARTCODE
.uleb128 0
.uleb128 .LcallUR-.LSTARTCODE
.uleb128 .LENDCODE-.LcallUR
.uleb128 0
.uleb128 0
.Lcstend:
#ifdef SHARED
.hidden DW.ref.__gcc_personality_v0
.weak DW.ref.__gcc_personality_v0
.section .gnu.linkonce.d.DW.ref.__gcc_personality_v0,"aw",@progbits
.align 4
.type DW.ref.__gcc_personality_v0, @object
.size DW.ref.__gcc_personality_v0, 4
DW.ref.__gcc_personality_v0:
.long __gcc_personality_v0
#endif
|
