about summary refs log tree commit diff
path: root/nptl/sysdeps/unix/sysv/linux/sh/sem_timedwait.S
blob: 27a1bb019d8153c1e72d9ea6bff4767503ada08c (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
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
/* Copyright (C) 2003, 2004 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <sysdep.h>
#include <shlib-compat.h>
#include <pthread-errnos.h>
#include <tcb-offsets.h>
#include "lowlevel-atomic.h"


#define SYS_gettimeofday	__NR_gettimeofday
#define SYS_futex		240
#define FUTEX_WAIT		0
#define FUTEX_WAKE		1

	.text

	.globl	sem_timedwait
	.type	sem_timedwait,@function
	.align	5
	cfi_startproc
sem_timedwait:
	/* First check for cancellation.  */
	stc	gbr, r0
	mov.w	.Lchand, r1
	mov.l	@(r0,r1), r0
	mov	#0xf9, r1
	and	r1, r0
	cmp/eq	#8, r0
	bt	10f

	mov.l	@r4, r0
2:
	tst	r0, r0
	bt	1f
	mov	r0, r3
	mov	r0, r6
	add	#-1, r3
	CMPXCHG (r6, @r4, r3, r2)
	bf/s	2b
	 mov	r2, r0
	rts
	 mov	#0, r0

1:
	/* Check whether the timeout value is valid.  */
	mov.l	r8, @-r15
	cfi_adjust_cfa_offset(4)
	cfi_rel_offset (r8, 0)
	mov.l	r9, @-r15
	cfi_adjust_cfa_offset(4)
	cfi_rel_offset (r9, 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)
	add	#-8, r15
	cfi_adjust_cfa_offset(8)
	mov	r4, r8
	mov	r5, r9

	/* Check for invalid nanosecond field.  */
	mov.l	@(4,r9), r0
	mov.l	.L1g, r1
	cmp/hs	r1, r0
	bt/s	6f
	 mov	#EINVAL, r0
7:
	mov.l	.Lenable0, r1
	bsrf	r1
	 nop
.Lenable0b:
	mov	r0, r10

	/* Compute relative timeout.  */
	mov	r15, r4
	mov	#0, r5
	mov	#SYS_gettimeofday, r3
	trapa	#0x12
	SYSCALL_INST_PAD

	mov.l	@(4,r15), r0
	mov.w	.L1k, r1
	dmulu.l	r0, r1		/* Milli seconds to nano seconds.  */
	mov.l	@r9, r2
	mov.l	@(4,r9), r3
	mov.l	@r15, r0
	sts	macl, r1
	sub	r0, r2
	clrt
	subc	r1, r3
	bf	5f
	mov.l	.L1g, r1
	add	r1, r3
	add	#-1, r2
5:
	cmp/pz	r2
	bf	6f		/* Time is already up.  */

	/* Store relative timeout.  */
	mov.l	r2, @r15
	mov.l	r3, @(4,r15)

	/* Futex call.  */
	mov	r8, r4
	mov	#FUTEX_WAIT, r5
	mov	#0, r6
	mov	r15, 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

	tst	r0, r0
	bt	9f
	cmp/eq	#-EWOULDBLOCK, r0
	bf	3f
9:
	mov.l	@r8, r0
8:
	tst	r0, r0
	bt	7b

	mov	r0, r3
	mov	r0, r4
	add	#-1, r3
	CMPXCHG (r4, @r8, r3, r2)
	bf/s	8b
	 mov	r2, r0

	add	#8, r15
	lds.l	@r15+, pr
	mov.l	@r15+, r12
	mov.l	@r15+, r10
	mov.l	@r15+, r9
	mov.l	@r15+, r8
	rts
	 mov	#0, r0

3:
	neg	r0, r0
6:
	mov	r0, r8
	mova	.Lgot2, r0
	mov.l	.Lgot2, r12
	add	r0, r12

#if USE___THREAD
	mov.l	.Lerrno2, r0
	stc	gbr, r1
	mov.l	@(r0, r12), r0
	add	r1, r0
	mov.l	r8, @r0
#else
	mov.l	.Lerrloc2, r1
	bsrf	r1
	 nop
.Lerrloc2b:
	mov.l	r8, @r0
#endif
	add	#8, r15
	lds.l	@r15+, pr
	mov.l	@r15+, r12
	mov.l	@r15+, r10
	mov.l	@r15+, r9
	mov.l	@r15+, r8
	rts
	 mov	#-1, r0

10:
	/* Canceled.  */
	stc	gbr, r0
	mov.w	.Lresult, r1
	mov	#-1, r2
	mov.l	r2, @(r0,r1)
	mov.w	.Lchand, r0
	or.b	#0x10, @(r0,gbr)
	stc	gbr, r0
	mov.w	.Lclbuf, r1
	mov.l	.Lunwind, r2
	braf	r2
	 mov.l	@(r0,r1), r4
.Lunwindb:
	cfi_endproc

.L1k:
	.word	1000
.Lchand:
	.word	CANCELHANDLING - TLS_PRE_TCB_SIZE
.Lresult:
	.word	RESULT - TLS_PRE_TCB_SIZE
.Lclbuf:
	.word	CLEANUP_JMP_BUF - TLS_PRE_TCB_SIZE
	.align	2
.L1g:
	.long	1000000000
.Lgot2:
	.long	_GLOBAL_OFFSET_TABLE_
#if USE___THREAD
.Lerrno2:
	.long	errno@GOTTPOFF
#else
.Lerrloc2:
	.long	__errno_location@PLT-(.Lerrloc2b-.)
#endif
.Lenable0:
	.long	__pthread_enable_asynccancel-.Lenable0b
.Ldisable0:
	.long	__pthread_disable_asynccancel-.Ldisable0b
.Lunwind:
	.long	HIDDEN_JUMPTARGET (__pthread_unwind)-.Lunwindb
	.size	sem_timedwait,.-sem_timedwait