mirror of git://sourceware.org/git/glibc.git
309 lines
6.2 KiB
ArmAsm
309 lines
6.2 KiB
ArmAsm
/* Copyright (C) 2002, 2003, 2005, 2007, 2009 Free Software Foundation, Inc.
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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 <kernel-features.h>
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#include <lowlevellock.h>
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#include <shlib-compat.h>
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#include <pthread-errnos.h>
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#include <structsem.h>
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/* For the calculation see asm/vsyscall.h. */
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#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000
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.text
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.globl sem_timedwait
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.type sem_timedwait,@function
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.align 16
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sem_timedwait:
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.LSTARTCODE:
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cfi_startproc
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#ifdef SHARED
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cfi_personality(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect,
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DW.ref.__gcc_personality_v0)
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cfi_lsda(DW_EH_PE_pcrel | DW_EH_PE_sdata4, .LexceptSTART)
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#else
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cfi_personality(DW_EH_PE_udata4, __gcc_personality_v0)
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cfi_lsda(DW_EH_PE_udata4, .LexceptSTART)
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#endif
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#if VALUE == 0
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movl (%rdi), %eax
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#else
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movl VALUE(%rdi), %eax
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#endif
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2: testl %eax, %eax
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je 1f
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leaq -1(%rax), %rdx
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LOCK
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#if VALUE == 0
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cmpxchgl %edx, (%rdi)
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#else
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cmpxchgl %edx, VALUE(%rdi)
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#endif
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jne 2b
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xorl %eax, %eax
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retq
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/* Check whether the timeout value is valid. */
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1: pushq %r12
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cfi_adjust_cfa_offset(8)
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cfi_rel_offset(%r12, 0)
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pushq %r13
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cfi_adjust_cfa_offset(8)
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cfi_rel_offset(%r13, 0)
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pushq %r14
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cfi_adjust_cfa_offset(8)
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cfi_rel_offset(%r14, 0)
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#ifdef __ASSUME_FUTEX_CLOCK_REALTIME
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# define STACKFRAME 8
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#else
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# define STACKFRAME 24
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#endif
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subq $STACKFRAME, %rsp
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cfi_adjust_cfa_offset(STACKFRAME)
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movq %rdi, %r12
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movq %rsi, %r13
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/* Check for invalid nanosecond field. */
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cmpq $1000000000, 8(%r13)
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movl $EINVAL, %r14d
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jae 6f
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LOCK
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addq $1, NWAITERS(%r12)
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#ifndef __ASSUME_FUTEX_CLOCK_REALTIME
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# ifdef PIC
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cmpl $0, __have_futex_clock_realtime(%rip)
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# else
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cmpl $0, __have_futex_clock_realtime
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# endif
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je .Lreltmo
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#endif
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.LcleanupSTART:
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13: call __pthread_enable_asynccancel
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movl %eax, (%rsp)
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movq %r13, %r10
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#if VALUE == 0
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movq %r12, %rdi
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#else
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leaq VALUE(%r12), %rdi
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#endif
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movl $0xffffffff, %r9d
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movl $FUTEX_WAIT_BITSET|FUTEX_CLOCK_REALTIME, %esi
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orl PRIVATE(%rdi), %esi
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movl $SYS_futex, %eax
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xorl %edx, %edx
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syscall
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movq %rax, %r14
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movl (%rsp), %edi
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call __pthread_disable_asynccancel
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.LcleanupEND:
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testq %r14, %r14
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je 11f
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cmpq $-EWOULDBLOCK, %r14
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jne 3f
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11:
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#if VALUE == 0
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movl (%r12), %eax
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#else
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movl VALUE(%r12), %eax
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#endif
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14: testl %eax, %eax
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je 13b
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leaq -1(%rax), %rcx
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LOCK
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#if VALUE == 0
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cmpxchgl %ecx, (%r12)
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#else
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cmpxchgl %ecx, VALUE(%r12)
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#endif
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jne 14b
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10: xorl %eax, %eax
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15: LOCK
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subq $1, NWAITERS(%r12)
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addq $STACKFRAME, %rsp
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cfi_adjust_cfa_offset(-STACKFRAME)
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popq %r14
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r14)
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popq %r13
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r13)
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popq %r12
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cfi_adjust_cfa_offset(-8)
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cfi_restore(%r12)
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retq
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cfi_adjust_cfa_offset(STACKFRAME + 3 * 8)
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cfi_rel_offset(%r12, STACKFRAME + 2 * 8)
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cfi_rel_offset(%r13, STACKFRAME + 1 * 8)
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cfi_rel_offset(%r14, STACKFRAME)
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3: negq %r14
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6:
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#if USE___THREAD
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movq errno@gottpoff(%rip), %rdx
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movl %r14d, %fs:(%rdx)
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#else
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callq __errno_location@plt
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movl %r14d, (%rax)
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#endif
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orl $-1, %eax
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jmp 15b
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#ifndef __ASSUME_FUTEX_CLOCK_REALTIME
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.Lreltmo:
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7: xorl %esi, %esi
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movq %rsp, %rdi
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movq $VSYSCALL_ADDR_vgettimeofday, %rax
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callq *%rax
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/* Compute relative timeout. */
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movq 8(%rsp), %rax
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movl $1000, %edi
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mul %rdi /* Milli seconds to nano seconds. */
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movq (%r13), %rdi
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movq 8(%r13), %rsi
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subq (%rsp), %rdi
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subq %rax, %rsi
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jns 5f
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addq $1000000000, %rsi
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decq %rdi
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5: testq %rdi, %rdi
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movl $ETIMEDOUT, %r14d
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js 6b /* Time is already up. */
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movq %rdi, (%rsp) /* Store relative timeout. */
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movq %rsi, 8(%rsp)
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.LcleanupSTART2:
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call __pthread_enable_asynccancel
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movl %eax, 16(%rsp)
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movq %rsp, %r10
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# if VALUE == 0
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movq %r12, %rdi
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# else
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leaq VALUE(%r12), %rdi
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# endif
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# if FUTEX_WAIT == 0
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movl PRIVATE(%rdi), %esi
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# else
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movl $FUTEX_WAIT, %esi
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orl PRIVATE(%rdi), %esi
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# endif
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movl $SYS_futex, %eax
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xorl %edx, %edx
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syscall
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movq %rax, %r14
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movl 16(%rsp), %edi
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call __pthread_disable_asynccancel
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.LcleanupEND2:
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testq %r14, %r14
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je 9f
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cmpq $-EWOULDBLOCK, %r14
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jne 3b
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9:
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# if VALUE == 0
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movl (%r12), %eax
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# else
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movl VALUE(%r12), %eax
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# endif
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8: testl %eax, %eax
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je 7b
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leaq -1(%rax), %rcx
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LOCK
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# if VALUE == 0
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cmpxchgl %ecx, (%r12)
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# else
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cmpxchgl %ecx, VALUE(%r12)
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# endif
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jne 8b
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jmp 10b
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#endif
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.size sem_timedwait,.-sem_timedwait
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.type sem_timedwait_cleanup,@function
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sem_timedwait_cleanup:
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LOCK
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subq $1, NWAITERS(%r12)
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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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cfi_endproc
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.size sem_timedwait_cleanup,.-sem_timedwait_cleanup
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.section .gcc_except_table,"a",@progbits
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.LexceptSTART:
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.byte DW_EH_PE_omit # @LPStart format
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.byte DW_EH_PE_omit # @TType format
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.byte DW_EH_PE_uleb128 # call-site format
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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_timedwait_cleanup-.LSTARTCODE
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.uleb128 0
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#ifndef __ASSUME_FUTEX_CLOCK_REALTIME
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.uleb128 .LcleanupSTART2-.LSTARTCODE
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.uleb128 .LcleanupEND2-.LcleanupSTART2
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.uleb128 sem_timedwait_cleanup-.LSTARTCODE
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.uleb128 0
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#endif
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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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#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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