diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S b/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S deleted file mode 100644 index da14bc30bc..0000000000 --- a/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S +++ /dev/null @@ -1,161 +0,0 @@ -/* Copyright (C) 2002-2016 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. - - 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, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#include <shlib-compat.h> -#include <lowlevellock.h> -#include <lowlevelcond.h> -#include <pthread-pi-defines.h> -#include <kernel-features.h> -#include <pthread-errnos.h> -#include <stap-probe.h> - - - .text - -ENTRY(__pthread_cond_signal) - - LIBC_PROBE (cond_signal, 1, %rdi) - - /* Get internal lock. */ - movq %rdi, %r8 - movl $1, %esi - xorl %eax, %eax - LOCK -#if cond_lock == 0 - cmpxchgl %esi, (%rdi) -#else - cmpxchgl %esi, cond_lock(%rdi) -#endif - jnz 1f - -2: addq $cond_futex, %rdi - movq total_seq(%r8), %rcx - cmpq wakeup_seq(%r8), %rcx - jbe 4f - - /* Bump the wakeup number. */ - addq $1, wakeup_seq(%r8) - addl $1, (%rdi) - - /* Wake up one thread. */ - LP_OP(cmp) $-1, dep_mutex(%r8) - movl $FUTEX_WAKE_OP, %esi - movl $1, %edx - movl $SYS_futex, %eax - je 8f - - /* Get the address of the mutex used. */ - mov dep_mutex(%r8), %RCX_LP - movl MUTEX_KIND(%rcx), %r11d - andl $(ROBUST_BIT|PI_BIT), %r11d - cmpl $PI_BIT, %r11d - je 9f - -#ifdef __ASSUME_PRIVATE_FUTEX - movl $(FUTEX_WAKE_OP|FUTEX_PRIVATE_FLAG), %esi -#else - orl %fs:PRIVATE_FUTEX, %esi -#endif - -8: movl $1, %r10d -#if cond_lock != 0 - addq $cond_lock, %r8 -#endif - movl $FUTEX_OP_CLEAR_WAKE_IF_GT_ONE, %r9d - syscall -#if cond_lock != 0 - subq $cond_lock, %r8 -#endif - /* For any kind of error, we try again with WAKE. - The general test also covers running on old kernels. */ - cmpq $-4095, %rax - jae 7f - - xorl %eax, %eax - retq - - /* Wake up one thread and requeue none in the PI Mutex case. */ -9: movl $(FUTEX_CMP_REQUEUE_PI|FUTEX_PRIVATE_FLAG), %esi - movq %rcx, %r8 - xorq %r10, %r10 - movl (%rdi), %r9d // XXX Can this be right? - syscall - - leaq -cond_futex(%rdi), %r8 - - /* For any kind of error, we try again with WAKE. - The general test also covers running on old kernels. */ - cmpq $-4095, %rax - jb 4f - -7: -#ifdef __ASSUME_PRIVATE_FUTEX - andl $FUTEX_PRIVATE_FLAG, %esi -#else - andl %fs:PRIVATE_FUTEX, %esi -#endif - orl $FUTEX_WAKE, %esi - movl $SYS_futex, %eax - /* %rdx should be 1 already from $FUTEX_WAKE_OP syscall. - movl $1, %edx */ - syscall - - /* Unlock. */ -4: LOCK -#if cond_lock == 0 - decl (%r8) -#else - decl cond_lock(%r8) -#endif - jne 5f - -6: xorl %eax, %eax - retq - - /* Initial locking failed. */ -1: -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - LP_OP(cmp) $-1, dep_mutex-cond_lock(%rdi) - movl $LLL_PRIVATE, %eax - movl $LLL_SHARED, %esi - cmovne %eax, %esi - callq __lll_lock_wait -#if cond_lock != 0 - subq $cond_lock, %rdi -#endif - jmp 2b - - /* Unlock in loop requires wakeup. */ -5: - movq %r8, %rdi -#if cond_lock != 0 - addq $cond_lock, %rdi -#endif - LP_OP(cmp) $-1, dep_mutex-cond_lock(%rdi) - movl $LLL_PRIVATE, %eax - movl $LLL_SHARED, %esi - cmovne %eax, %esi - callq __lll_unlock_wake - jmp 6b -END(__pthread_cond_signal) - -versioned_symbol (libpthread, __pthread_cond_signal, pthread_cond_signal, - GLIBC_2_3_2) |