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
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
|
/* Copyright (C) 2002-2014 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 <shlib-compat.h>
#include <pthread-errnos.h>
#include <structsem.h>
#include <lowlevellock.h>
#if VALUE != 0
# error "code needs to be rewritten for VALUE != 0"
#endif
.text
.globl sem_timedwait
.type sem_timedwait,@function
.align 16
sem_timedwait:
.LSTARTCODE:
movl 4(%esp), %ecx
movl (%ecx), %eax
2: testl %eax, %eax
je 1f
leal -1(%eax), %edx
LOCK
cmpxchgl %edx, (%ecx)
jne 2b
xorl %eax, %eax
ret
/* Check whether the timeout value is valid. */
1: pushl %esi
.Lpush_esi:
pushl %edi
.Lpush_edi:
pushl %ebx
.Lpush_ebx:
subl $12, %esp
.Lsub_esp:
movl 32(%esp), %edi
/* Check for invalid nanosecond field. */
cmpl $1000000000, 4(%edi)
movl $EINVAL, %esi
jae .Lerrno_exit
LOCK
incl NWAITERS(%ecx)
7: xorl %ecx, %ecx
movl %esp, %ebx
movl %ecx, %edx
movl $__NR_gettimeofday, %eax
ENTER_KERNEL
/* Compute relative timeout. */
movl 4(%esp), %eax
movl $1000, %edx
mul %edx /* Milli seconds to nano seconds. */
movl (%edi), %ecx
movl 4(%edi), %edx
subl (%esp), %ecx
subl %eax, %edx
jns 5f
addl $1000000000, %edx
subl $1, %ecx
5: testl %ecx, %ecx
movl $ETIMEDOUT, %esi
js 6f /* Time is already up. */
movl %ecx, (%esp) /* Store relative timeout. */
movl %edx, 4(%esp)
.LcleanupSTART:
call __pthread_enable_asynccancel
movl %eax, 8(%esp)
movl 28(%esp), %ebx /* Load semaphore address. */
#if FUTEX_WAIT == 0
movl PRIVATE(%ebx), %ecx
#else
movl $FUTEX_WAIT, %ecx
orl PRIVATE(%ebx), %ecx
#endif
movl %esp, %esi
xorl %edx, %edx
movl $SYS_futex, %eax
ENTER_KERNEL
movl %eax, %esi
movl 8(%esp), %eax
call __pthread_disable_asynccancel
.LcleanupEND:
testl %esi, %esi
je 9f
cmpl $-EWOULDBLOCK, %esi
jne 3f
9: movl (%ebx), %eax
8: testl %eax, %eax
je 7b
leal -1(%eax), %ecx
LOCK
cmpxchgl %ecx, (%ebx)
jne 8b
xorl %eax, %eax
LOCK
decl NWAITERS(%ebx)
10: addl $12, %esp
.Ladd_esp:
popl %ebx
.Lpop_ebx:
popl %edi
.Lpop_edi:
popl %esi
.Lpop_esi:
ret
.Lafter_ret:
3: negl %esi
6:
movl 28(%esp), %ebx /* Load semaphore address. */
LOCK
decl NWAITERS(%ebx)
.Lerrno_exit:
#ifdef PIC
SETUP_PIC_REG(bx)
#else
movl $4f, %ebx
4:
#endif
addl $_GLOBAL_OFFSET_TABLE_, %ebx
#ifdef NO_TLS_DIRECT_SEG_REFS
movl errno@gotntpoff(%ebx), %edx
addl %gs:0, %edx
movl %esi, (%edx)
#else
movl errno@gotntpoff(%ebx), %edx
movl %esi, %gs:(%edx)
#endif
orl $-1, %eax
jmp 10b
.size sem_timedwait,.-sem_timedwait
.type sem_wait_cleanup,@function
sem_wait_cleanup:
LOCK
decl NWAITERS(%ebx)
movl %eax, (%esp)
.LcallUR:
call _Unwind_Resume@PLT
hlt
.LENDCODE:
.size sem_wait_cleanup,.-sem_wait_cleanup
.section .gcc_except_table,"a",@progbits
.LexceptSTART:
.byte 0xff # @LPStart format (omit)
.byte 0xff # @TType format (omit)
.byte 0x01 # call-site format
# DW_EH_PE_uleb128
.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:
.section .eh_frame,"a",@progbits
.LSTARTFRAME:
.long .LENDCIE-.LSTARTCIE # Length of the CIE.
.LSTARTCIE:
.long 0 # CIE ID.
.byte 1 # Version number.
#ifdef SHARED
.string "zPLR" # NUL-terminated augmentation
# string.
#else
.string "zPL" # NUL-terminated augmentation
# string.
#endif
.uleb128 1 # Code alignment factor.
.sleb128 -4 # Data alignment factor.
.byte 8 # Return address register
# column.
#ifdef SHARED
.uleb128 7 # Augmentation value length.
.byte 0x9b # Personality: DW_EH_PE_pcrel
# + DW_EH_PE_sdata4
# + DW_EH_PE_indirect
.long DW.ref.__gcc_personality_v0-.
.byte 0x1b # LSDA Encoding: DW_EH_PE_pcrel
# + DW_EH_PE_sdata4.
.byte 0x1b # FDE Encoding: DW_EH_PE_pcrel
# + DW_EH_PE_sdata4.
#else
.uleb128 6 # Augmentation value length.
.byte 0x0 # Personality: absolute
.long __gcc_personality_v0
.byte 0x0 # LSDA Encoding: absolute
#endif
.byte 0x0c # DW_CFA_def_cfa
.uleb128 4
.uleb128 4
.byte 0x88 # DW_CFA_offset, column 0x10
.uleb128 1
.align 4
.LENDCIE:
.long .LENDFDE-.LSTARTFDE # Length of the FDE.
.LSTARTFDE:
.long .LSTARTFDE-.LSTARTFRAME # CIE pointer.
#ifdef SHARED
.long .LSTARTCODE-. # PC-relative start address
# of the code.
#else
.long .LSTARTCODE # Start address of the code.
#endif
.long .LENDCODE-.LSTARTCODE # Length of the code.
.uleb128 4 # Augmentation size
#ifdef SHARED
.long .LexceptSTART-.
#else
.long .LexceptSTART
#endif
.byte 4 # DW_CFA_advance_loc4
.long .Lpush_esi-.LSTARTCODE
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 8
.byte 0x86 # DW_CFA_offset %esi
.uleb128 2
.byte 4 # DW_CFA_advance_loc4
.long .Lpush_edi-.Lpush_esi
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 12
.byte 0x87 # DW_CFA_offset %edi
.uleb128 3
.byte 4 # DW_CFA_advance_loc4
.long .Lpush_ebx-.Lpush_edi
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 16
.byte 0x83 # DW_CFA_offset %ebx
.uleb128 4
.byte 4 # DW_CFA_advance_loc4
.long .Lsub_esp-.Lpush_ebx
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 28
.byte 4 # DW_CFA_advance_loc4
.long .Ladd_esp-.Lsub_esp
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 16
.byte 4 # DW_CFA_advance_loc4
.long .Lpop_ebx-.Ladd_esp
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 12
.byte 0xc3 # DW_CFA_restore %ebx
.byte 4 # DW_CFA_advance_loc4
.long .Lpop_edi-.Lpop_ebx
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 8
.byte 0xc7 # DW_CFA_restore %edi
.byte 4 # DW_CFA_advance_loc4
.long .Lpop_esi-.Lpop_edi
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 4
.byte 0xc6 # DW_CFA_restore %esi
.byte 4 # DW_CFA_advance_loc4
.long .Lafter_ret-.Lpop_esi
.byte 14 # DW_CFA_def_cfa_offset
.uleb128 28
.byte 0x86 # DW_CFA_offset %esi
.uleb128 2
.byte 0x87 # DW_CFA_offset %edi
.uleb128 3
.byte 0x83 # DW_CFA_offset %ebx
.uleb128 4
.align 4
.LENDFDE:
#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
|
