2007-05-15 06:24:31 +00:00
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/* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc.
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2003-03-11 06:52:08 +00:00
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdep.h>
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#include <shlib-compat.h>
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2003-03-12 10:28:07 +00:00
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#include <pthread-errnos.h>
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2007-05-26 01:31:40 +00:00
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#include <structsem.h>
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2003-03-11 06:52:08 +00:00
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#ifndef UP
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# define LOCK lock
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#else
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# define
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#endif
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#define SYS_futex 202
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2007-05-26 01:31:40 +00:00
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#define FUTEX_WAIT 0
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2003-03-11 06:52:08 +00:00
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.text
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2003-03-13 01:51:12 +00:00
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.globl sem_wait
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.type sem_wait,@function
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2003-03-11 06:52:08 +00:00
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.align 16
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2003-03-13 01:51:12 +00:00
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sem_wait:
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2007-05-26 01:31:40 +00:00
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.LSTARTCODE:
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2003-06-08 05:28:14 +00:00
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pushq %r12
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2007-05-26 01:31:40 +00:00
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.Lpush_r12:
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2003-06-08 05:28:14 +00:00
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pushq %r13
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2007-05-26 01:31:40 +00:00
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.Lpush_r13:
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2003-06-08 05:28:14 +00:00
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movq %rdi, %r13
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2007-05-26 01:31:40 +00:00
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#if VALUE == 0
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movl (%r13), %eax
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#else
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movl VALUE(%r13), %eax
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#endif
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2003-03-11 06:52:08 +00:00
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2: testl %eax, %eax
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je 1f
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2007-05-26 01:31:40 +00:00
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leal -1(%rax), %edx
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2003-03-11 06:52:08 +00:00
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LOCK
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2007-05-26 01:31:40 +00:00
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#if VALUE == 0
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2003-06-08 05:28:14 +00:00
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cmpxchgl %edx, (%r13)
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2007-05-26 01:31:40 +00:00
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#else
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cmpxchgl %edx, VALUE(%r13)
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#endif
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2003-03-11 06:52:08 +00:00
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jne 2b
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2007-05-26 01:31:40 +00:00
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7: xorl %eax, %eax
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9: popq %r13
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.Lpop_r13:
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2003-06-08 05:28:14 +00:00
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popq %r12
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2007-05-26 01:31:40 +00:00
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.Lpop_r12:
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2003-06-08 05:28:14 +00:00
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2003-03-11 06:52:08 +00:00
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retq
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2007-05-26 01:31:40 +00:00
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.Lafter_retq:
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1: LOCK
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addq $1, NWAITERS(%r13)
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.LcleanupSTART:
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6: call __pthread_enable_asynccancel
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2003-06-08 05:28:14 +00:00
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movl %eax, %r8d
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xorq %r10, %r10
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2005-03-31 10:02:53 +00:00
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movl $SYS_futex, %eax
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2003-06-08 05:28:14 +00:00
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movq %r13, %rdi
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2007-05-26 01:31:40 +00:00
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movl $FUTEX_WAIT, %esi
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xorl %edx, %edx
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2003-03-11 06:52:08 +00:00
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syscall
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2003-06-08 05:28:14 +00:00
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movq %rax, %r12
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movl %r8d, %edi
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call __pthread_disable_asynccancel
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2007-05-26 01:31:40 +00:00
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.LcleanupEND:
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2003-03-11 06:52:08 +00:00
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2003-06-08 05:28:14 +00:00
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testq %r12, %r12
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2007-05-26 01:31:40 +00:00
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je 3f
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2003-06-08 05:28:14 +00:00
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cmpq $-EWOULDBLOCK, %r12
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2007-05-26 01:31:40 +00:00
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jne 4f
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3:
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#if VALUE == 0
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movl (%r13), %eax
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#else
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movl VALUE(%r13), %eax
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#endif
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5: testl %eax, %eax
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je 6b
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leal -1(%rax), %edx
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LOCK
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#if VALUE == 0
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cmpxchgl %edx, (%r13)
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#else
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cmpxchgl %edx, VALUE(%r13)
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#endif
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jne 5b
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LOCK
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subq $1, NWAITERS(%r13)
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jmp 7b
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4: negq %r12
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2003-03-11 06:52:08 +00:00
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#if USE___THREAD
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movq errno@gottpoff(%rip), %rdx
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2003-06-08 05:28:14 +00:00
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movl %r12d, %fs:(%rdx)
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2003-03-11 06:52:08 +00:00
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#else
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2003-03-11 19:40:00 +00:00
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callq __errno_location@plt
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2003-06-08 05:28:14 +00:00
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movl %r12d, (%rax)
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2003-03-11 06:52:08 +00:00
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#endif
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orl $-1, %eax
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2003-06-08 05:28:14 +00:00
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2007-05-26 01:31:40 +00:00
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LOCK
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subq $1, NWAITERS(%r13)
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2003-06-08 05:28:14 +00:00
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2007-05-26 01:31:40 +00:00
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jmp 9b
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2003-03-13 01:51:12 +00:00
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.size sem_wait,.-sem_wait
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2007-05-26 01:31:40 +00:00
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.type sem_wait_cleanup,@function
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sem_wait_cleanup:
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LOCK
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subq $1, NWAITERS(%r13)
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movq %rax, %rdi
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.LcallUR:
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call _Unwind_Resume@PLT
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hlt
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.LENDCODE:
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.size sem_wait_cleanup,.-sem_wait_cleanup
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.section .gcc_except_table,"a",@progbits
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.LexceptSTART:
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.byte 0xff # @LPStart format (omit)
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.byte 0xff # @TType format (omit)
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.byte 0x01 # call-site format
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# DW_EH_PE_uleb128
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.uleb128 .Lcstend-.Lcstbegin
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.Lcstbegin:
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.uleb128 .LcleanupSTART-.LSTARTCODE
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.uleb128 .LcleanupEND-.LcleanupSTART
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.uleb128 sem_wait_cleanup-.LSTARTCODE
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.uleb128 0
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.uleb128 .LcallUR-.LSTARTCODE
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.uleb128 .LENDCODE-.LcallUR
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.uleb128 0
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.uleb128 0
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.Lcstend:
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.section .eh_frame,"a",@progbits
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.LSTARTFRAME:
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.long .LENDCIE-.LSTARTCIE # Length of the CIE.
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.LSTARTCIE:
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.long 0 # CIE ID.
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.byte 1 # Version number.
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#ifdef SHARED
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.string "zPLR" # NUL-terminated augmentation
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# string.
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#else
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.string "zPL" # NUL-terminated augmentation
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# string.
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#endif
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.uleb128 1 # Code alignment factor.
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.sleb128 -8 # Data alignment factor.
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.byte 16 # Return address register
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# column.
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#ifdef SHARED
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.uleb128 7 # Augmentation value length.
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.byte 0x9b # Personality: DW_EH_PE_pcrel
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# + DW_EH_PE_sdata4
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# + DW_EH_PE_indirect
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.long DW.ref.__gcc_personality_v0-.
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.byte 0x1b # LSDA Encoding: DW_EH_PE_pcrel
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# + DW_EH_PE_sdata4.
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.byte 0x1b # FDE Encoding: DW_EH_PE_pcrel
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# + DW_EH_PE_sdata4.
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#else
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.uleb128 10 # Augmentation value length.
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.byte 0x0 # Personality: absolute
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.quad __gcc_personality_v0
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.byte 0x0 # LSDA Encoding: absolute
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#endif
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.byte 0x0c # DW_CFA_def_cfa
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.uleb128 7
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.uleb128 8
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.byte 0x90 # DW_CFA_offset, column 0x10
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.uleb128 1
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.align 8
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.LENDCIE:
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.long .LENDFDE-.LSTARTFDE # Length of the FDE.
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.LSTARTFDE:
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.long .LSTARTFDE-.LSTARTFRAME # CIE pointer.
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#ifdef SHARED
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.long .LSTARTCODE-. # PC-relative start address
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# of the code.
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.long .LENDCODE-.LSTARTCODE # Length of the code.
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.uleb128 4 # Augmentation size
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.long .LexceptSTART-.
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#else
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.quad .LSTARTCODE # Start address of the code.
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.quad .LENDCODE-.LSTARTCODE # Length of the code.
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.uleb128 8 # Augmentation size
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.quad .LexceptSTART
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#endif
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.byte 4 # DW_CFA_advance_loc4
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.long .Lpush_r12-.LSTARTCODE
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.byte 14 # DW_CFA_def_cfa_offset
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.uleb128 16
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.byte 0x8c # DW_CFA_offset %r12
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.uleb128 2
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.byte 4 # DW_CFA_advance_loc4
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.long .Lpush_r13-.Lpush_r12
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.byte 14 # DW_CFA_def_cfa_offset
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.uleb128 24
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.byte 0x8d # DW_CFA_offset %r13
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.uleb128 3
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.byte 4 # DW_CFA_advance_loc4
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.long .Lpop_r13-.Lpush_r13
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.byte 14 # DW_CFA_def_cfa_offset
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.uleb128 16
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.byte 0xcd # DW_CFA_restore %r13
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.byte 4 # DW_CFA_advance_loc4
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.long .Lpop_r12-.Lpop_r13
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.byte 14 # DW_CFA_def_cfa_offset
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.uleb128 8
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.byte 0xcc # DW_CFA_restore %r12
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.byte 4 # DW_CFA_advance_loc4
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.long .Lafter_retq-.Lpop_r12
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.byte 14 # DW_CFA_def_cfa_offset
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.uleb128 24
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.byte 0x8c # DW_CFA_offset %r12
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.uleb128 2
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.byte 0x8d # DW_CFA_offset %r13
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.uleb128 3
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.align 8
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.LENDFDE:
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#ifdef SHARED
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.hidden DW.ref.__gcc_personality_v0
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.weak DW.ref.__gcc_personality_v0
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.section .gnu.linkonce.d.DW.ref.__gcc_personality_v0,"aw",@progbits
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.align 8
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.type DW.ref.__gcc_personality_v0, @object
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.size DW.ref.__gcc_personality_v0, 8
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DW.ref.__gcc_personality_v0:
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.quad __gcc_personality_v0
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#endif
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