1 /* Copyright (C) 2002, 2003, 2005, 2007, 2009 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include <lowlevellock.h>
22 #include <pthread-errnos.h>
23 #include <structsem.h>
29 .type sem_wait,@function
38 movl VALUE(%rdi), %eax
48 cmpxchgl %edx, VALUE(%rdi)
55 /* This push is only needed to store the sem_t pointer for the
58 cfi_adjust_cfa_offset(8)
61 addq $1, NWAITERS(%rdi)
64 6: call __pthread_enable_asynccancel
70 movl PRIVATE(%rdi), %esi
72 movl $FUTEX_WAIT, %esi
73 orl PRIVATE(%rdi), %esi
80 call __pthread_disable_asynccancel
86 cmpq $-EWOULDBLOCK, %rcx
93 movl VALUE(%rdi), %eax
101 cmpxchgl %edx, (%rdi)
103 cmpxchgl %edx, VALUE(%rdi)
110 subq $1, NWAITERS(%rdi)
113 cfi_adjust_cfa_offset(-8)
117 cfi_adjust_cfa_offset(8)
120 movq errno@gottpoff(%rip), %rdx
121 movl %ecx, %fs:(%rdx)
123 # error "not supported. %rcx and %rdi must be preserved"
124 callq __errno_location@plt
130 .size sem_wait,.-sem_wait
133 .type sem_wait_cleanup,@function
137 subq $1, NWAITERS(%rdi)
140 call _Unwind_Resume@PLT
144 .size sem_wait_cleanup,.-sem_wait_cleanup
147 .section .gcc_except_table,"a",@progbits
149 .byte DW_EH_PE_omit # @LPStart format
150 .byte DW_EH_PE_omit # @TType format
151 .byte DW_EH_PE_uleb128 # call-site format
152 .uleb128 .Lcstend-.Lcstbegin
154 .uleb128 .LcleanupSTART-.LSTARTCODE
155 .uleb128 .LcleanupEND-.LcleanupSTART
156 .uleb128 sem_wait_cleanup-.LSTARTCODE
158 .uleb128 .LcallUR-.LSTARTCODE
159 .uleb128 .LENDCODE-.LcallUR
166 .hidden DW.ref.__gcc_personality_v0
167 .weak DW.ref.__gcc_personality_v0
168 .section .gnu.linkonce.d.DW.ref.__gcc_personality_v0,"aw",@progbits
170 .type DW.ref.__gcc_personality_v0, @object
171 .size DW.ref.__gcc_personality_v0, 8
172 DW.ref.__gcc_personality_v0:
173 .quad __gcc_personality_v0