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4a17085f15
2003-07-12 Kaz Kojima <kkojima@rr.iij4u.or.jp> * sysdeps/unix/sysv/linux/sh/socket.S: Save and restore the PR register across CENABLE and CDISABLE.
431 lines
7.1 KiB
ArmAsm
431 lines
7.1 KiB
ArmAsm
/* Copyright (C) 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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#include <lowlevelcond.h>
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#include "lowlevel-atomic.h"
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#define SYS_futex 240
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#define FUTEX_WAIT 0
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#define FUTEX_WAKE 1
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.text
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.align 5
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.type __condvar_cleanup, @function
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.globl __condvar_cleanup
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.hidden __condvar_cleanup
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__condvar_cleanup:
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mov.l r8, @-r15
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mov.l r9, @-r15
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sts.l pr, @-r15
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mov r4, r9
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mov.l @(4,r9), r8
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/* Get internal lock. */
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mov #1, r3
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#if cond_lock != 0
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XADD (r3, @(cond_lock,r8), r2)
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#else
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XADD (r3, @r8, r2)
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#endif
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tst r2, r2
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bt 1f
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mov r8, r5
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#if cond_lock != 0
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add #cond_lock, r5
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#endif
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mov r2, r4
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mov.l .Lwait0, r1
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bsrf r1
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nop
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.Lwait0b:
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1:
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mov #1, r2
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mov #0, r3
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clrt
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mov.l @(wakeup_seq,r8),r0
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mov.l @(wakeup_seq+4,r8),r1
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addc r2, r0
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addc r3, r1
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mov.l r0,@(wakeup_seq,r8)
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mov.l r1,@(wakeup_seq+4,r8)
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clrt
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mov.l @(woken_seq,r8),r0
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mov.l @(woken_seq+4,r8),r1
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addc r2, r0
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addc r3, r1
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mov.l r0,@(woken_seq,r8)
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mov.l r1,@(woken_seq+4,r8)
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/* Release internal lock. */
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#if cond_lock != 0
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DEC (@(cond_lock,r8), r2)
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#else
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DEC (@r8, r2)
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#endif
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tst r2, r2
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bt 2f
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mov r8, r4
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#if cond_lock != 0
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add #cond_lock, r4
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#endif
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mov.l .Lwake0, r1
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bsrf r1
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nop
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.Lwake0b:
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2:
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/* Wake up all waiters to make sure no signal gets lost. */
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mov r8, r4
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add #wakeup_seq, r4
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mov #FUTEX_WAKE, r5
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mov #-1, r6
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shlr r6 /* r6 = 0x7fffffff */
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mov #0, r7
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mov #SYS_futex, r3
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extu.b r3, r3
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trapa #0x14
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SYSCALL_INST_PAD
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mov.l .Lmlocki1, r1
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bsrf r1
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mov.l @(8,r9), r4
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.Lmlocki1b:
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lds.l @r15+, pr
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mov.l @r15+, r9
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rts
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mov.l @r15+, r8
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.align 2
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.Lwait0:
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.long __lll_mutex_lock_wait-.Lwait0b
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.Lwake0:
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.long __lll_mutex_unlock_wake-.Lwake0b
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.Lmlocki1:
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.long __pthread_mutex_cond_lock-.Lmlocki1b
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.size __condvar_cleanup, .-__condvar_cleanup
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/* int pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex) */
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.globl __pthread_cond_wait
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.type __pthread_cond_wait, @function
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.align 5
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__pthread_cond_wait:
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mov.l r8, @-r15
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mov.l r9, @-r15
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mov.l r10, @-r15
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mov.l r11, @-r15
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mov.l r12, @-r15
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sts.l pr, @-r15
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add #-48, r15
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mov r4, r8
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mov r5, r9
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/* Get internal lock. */
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mov #1, r3
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#if cond_lock != 0
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XADD (r3, @(cond_lock,r8), r2)
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#else
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XADD (r3, @r8, r2)
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#endif
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tst r2, r2
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bt 2f
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bra 1f
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nop
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2:
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/* Store the reference to the mutex. If there is already a
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different value in there this is a bad user bug. */
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mov.l r9, @(dep_mutex,r8)
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/* Unlock the mutex. */
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mov.l .Lmunlock0, r1
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mov #0, r5
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bsrf r1
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mov r9, r4
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.Lmunlock0b:
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tst r0, r0
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bt 0f
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bra 12f
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nop
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0:
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mov #1, r2
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mov #0, r3
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clrt
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mov.l @(total_seq,r8),r0
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mov.l @(total_seq+4,r8),r1
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addc r2, r0
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addc r3, r1
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mov.l r0,@(total_seq,r8)
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mov.l r1,@(total_seq+4,r8)
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/* Install cancellation handler. */
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#ifdef PIC
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mova .Lgot0, r0
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mov.l .Lgot0, r12
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add r0, r12
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mov.l .Lccleanup0, r5
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add r12, r5
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#else
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mov.l .Lccleanup0, r5
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#endif
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mov r15, r4
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add #16, r4
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/* Prepare structure passed to cancellation handler. */
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mov.l r8, @(4,r15)
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mov.l r9, @(8,r15)
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mov.l .Lccpush0, r1
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bsrf r1
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mov r15, r6
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.Lccpush0b:
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/* Get and store current wakeup_seq value. */
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mov.l @(wakeup_seq,r8), r10
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mov.l @(wakeup_seq+4,r8), r11
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8:
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/* Unlock. */
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#if cond_lock != 0
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DEC (@(cond_lock,r8), r2)
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#else
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DEC (@r8, r2)
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#endif
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tst r2, r2
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bf 3f
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4:
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mov.l .Lenable0, r1
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bsrf r1
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nop
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.Lenable0b:
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mov.l r0, @r15
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mov #0, r7
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mov #FUTEX_WAIT, r5
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mov r10, r6
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mov r8, r4
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add #wakeup_seq, r4
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mov #SYS_futex, r3
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extu.b r3, r3
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trapa #0x14
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SYSCALL_INST_PAD
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mov.l .Ldisable0, r1
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bsrf r1
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mov.l @r15, r4
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.Ldisable0b:
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/* Lock. */
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mov #1, r3
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#if cond_lock != 0
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XADD (r3, @(cond_lock,r8), r2)
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#else
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XADD (r3, @r8, r2)
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#endif
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tst r2, r2
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bf 5f
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6:
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mov.l @(woken_seq,r8), r0
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mov.l @(woken_seq+4,r8), r1
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mov.l @(wakeup_seq,r8), r2
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mov.l @(wakeup_seq+4,r8), r3
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cmp/hi r11, r3
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bt 7f
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cmp/hi r3, r11
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bt 8b
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cmp/hs r2, r10
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bt 8b
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7:
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cmp/hi r1, r3
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bt 9f
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cmp/hi r3, r1
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bt 8b
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cmp/hi r0, r2
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bf 8b
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9:
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mov #1, r2
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mov #0, r3
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clrt
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mov.l @(woken_seq,r8),r0
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mov.l @(woken_seq+4,r8),r1
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addc r2, r0
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addc r3, r1
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mov.l r0,@(woken_seq,r8)
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mov.l r1,@(woken_seq+4,r8)
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#if cond_lock != 0
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DEC (@(cond_lock,r8), r2)
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#else
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DEC (@r8, r2)
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#endif
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tst r2, r2
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bf 10f
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11:
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/* Remove cancellation handler. */
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mov r15, r4
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add #16, r4
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mov.l .Lcpop0, r1
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bsrf r1
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mov #0, r5
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.Lcpop0b:
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mov r9, r4
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mov.l .Lmlocki0, r1
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bsrf r1
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nop
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.Lmlocki0b:
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/* We return the result of the mutex_lock operation. */
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14:
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add #48, r15
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lds.l @r15+, pr
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mov.l @r15+, r12
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mov.l @r15+, r11
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mov.l @r15+, r10
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mov.l @r15+, r9
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rts
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mov.l @r15+, r8
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.align 2
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.Lmunlock0:
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.long __pthread_mutex_unlock_usercnt-.Lmunlock0b
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#ifdef PIC
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.Lgot0:
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.long _GLOBAL_OFFSET_TABLE_
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.Lccleanup0:
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.long __condvar_cleanup@GOTOFF
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#else
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.Lccleanup0:
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.long __condvar_cleanup
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#endif
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.Lccpush0:
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.long __pthread_cleanup_push-.Lccpush0b
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.Lenable0:
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.long __pthread_enable_asynccancel-.Lenable0b
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.Ldisable0:
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.long __pthread_disable_asynccancel-.Ldisable0b
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.Lcpop0:
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.long __pthread_cleanup_pop-.Lcpop0b
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.Lmlocki0:
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.long __pthread_mutex_cond_lock-.Lmlocki0b
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1:
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/* Initial locking failed. */
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mov r8, r5
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#if cond_lock != 0
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add #cond_lock, r5
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#endif
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mov.l .Lmwait0, r1
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bsrf r1
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mov r2, r4
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.Lmwait0b:
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bra 2b
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nop
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3:
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/* Unlock in loop requires waekup. */
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mov r8, r4
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#if cond_lock != 0
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add #cond_lock, r4
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#endif
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mov.l .Lmwake0, r1
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bsrf r1
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nop
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.Lmwake0b:
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bra 4b
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nop
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5:
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/* Locking in loop failed. */
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mov r8, r5
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#if cond_lock != 0
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add #cond_lock, r5
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#endif
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mov.l .Lmwait1, r1
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bsrf r1
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mov r2, r4
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.Lmwait1b:
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bra 6b
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nop
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10:
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/* Unlock after loop requires wakeup. */
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mov r8, r4
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#if cond_lock != 0
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add #cond_lock, r4
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#endif
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mov.l .Lmwake1, r1
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bsrf r1
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nop
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.Lmwake1b:
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bra 11b
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nop
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12:
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/* The initial unlocking of the mutex failed. */
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mov.l r0, @(12,r15)
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#if cond_lock != 0
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DEC (@(cond_lock,r8), r2)
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#else
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DEC (@r8, r2)
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#endif
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tst r2, r2
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bf 13f
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mov r8, r4
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#if cond_lock != 0
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add #cond_lock, r4
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#endif
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mov.l .Lmwake2, r1
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bsrf r1
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nop
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.Lmwake2b:
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13:
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bra 14b
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mov.l @(12,r15), r0
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.align 2
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.Lmwait0:
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.long __lll_mutex_lock_wait-.Lmwait0b
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.Lmwake0:
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.long __lll_mutex_unlock_wake-.Lmwake0b
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.Lmwait1:
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.long __lll_mutex_lock_wait-.Lmwait1b
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.Lmwake1:
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.long __lll_mutex_unlock_wake-.Lmwake1b
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.Lmwake2:
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.long __lll_mutex_unlock_wake-.Lmwake2b
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.size __pthread_cond_wait, .-__pthread_cond_wait
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versioned_symbol (libpthread, __pthread_cond_wait, pthread_cond_wait,
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GLIBC_2_3_2)
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