diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S deleted file mode 100644 index 3bbb4c7f62..0000000000 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S +++ /dev/null @@ -1,177 +0,0 @@ -/* Copyright (C) 2002-2014 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 <lowlevellock.h> -#include <lowlevelrwlock.h> -#include <pthread-errnos.h> -#include <kernel-features.h> -#include <stap-probe.h> - - .text - - .globl __pthread_rwlock_rdlock - .type __pthread_rwlock_rdlock,@function - .align 16 -__pthread_rwlock_rdlock: - cfi_startproc - - LIBC_PROBE (rdlock_entry, 1, %rdi) - - xorq %r10, %r10 - - /* Get the lock. */ - movl $1, %esi - xorl %eax, %eax - LOCK -#if MUTEX == 0 - cmpxchgl %esi, (%rdi) -#else - cmpxchgl %esi, MUTEX(%rdi) -#endif - jnz 1f - -2: movl WRITER(%rdi), %eax - testl %eax, %eax - jne 14f - cmpl $0, WRITERS_QUEUED(%rdi) - je 5f - cmpl $0, FLAGS(%rdi) - je 5f - -3: incl READERS_QUEUED(%rdi) - je 4f - - movl READERS_WAKEUP(%rdi), %edx - - LOCK -#if MUTEX == 0 - decl (%rdi) -#else - decl MUTEX(%rdi) -#endif - jne 10f - -11: -#ifdef __ASSUME_PRIVATE_FUTEX - movl $FUTEX_PRIVATE_FLAG|FUTEX_WAIT, %esi - xorl PSHARED(%rdi), %esi -#else -# if FUTEX_WAIT == 0 - movl PSHARED(%rdi), %esi -# else - movl $FUTEX_WAIT, %esi - orl PSHARED(%rdi), %esi -# endif - xorl %fs:PRIVATE_FUTEX, %esi -#endif - addq $READERS_WAKEUP, %rdi - movl $SYS_futex, %eax - syscall - - subq $READERS_WAKEUP, %rdi - - /* Reget the lock. */ - movl $1, %esi - xorl %eax, %eax - LOCK -#if MUTEX == 0 - cmpxchgl %esi, (%rdi) -#else - cmpxchgl %esi, MUTEX(%rdi) -#endif - jnz 12f - -13: decl READERS_QUEUED(%rdi) - jmp 2b - -5: xorl %edx, %edx - incl NR_READERS(%rdi) - je 8f -9: LOCK -#if MUTEX == 0 - decl (%rdi) -#else - decl MUTEX(%rdi) -#endif - jne 6f -7: - - movq %rdx, %rax - retq - -1: movl PSHARED(%rdi), %esi -#if MUTEX != 0 - addq $MUTEX, %rdi -#endif - callq __lll_lock_wait -#if MUTEX != 0 - subq $MUTEX, %rdi -#endif - jmp 2b - -14: cmpl %fs:TID, %eax - jne 3b - /* Deadlock detected. */ - movl $EDEADLK, %edx - jmp 9b - -6: movl PSHARED(%rdi), %esi -#if MUTEX != 0 - addq $MUTEX, %rdi -#endif - callq __lll_unlock_wake -#if MUTEX != 0 - subq $MUTEX, %rdi -#endif - jmp 7b - - /* Overflow. */ -8: decl NR_READERS(%rdi) - movl $EAGAIN, %edx - jmp 9b - - /* Overflow. */ -4: decl READERS_QUEUED(%rdi) - movl $EAGAIN, %edx - jmp 9b - -10: movl PSHARED(%rdi), %esi -#if MUTEX != 0 - addq $MUTEX, %rdi -#endif - callq __lll_unlock_wake -#if MUTEX != 0 - subq $MUTEX, %rdi -#endif - jmp 11b - -12: movl PSHARED(%rdi), %esi -#if MUTEX == 0 - addq $MUTEX, %rdi -#endif - callq __lll_lock_wait -#if MUTEX != 0 - subq $MUTEX, %rdi -#endif - jmp 13b - cfi_endproc - .size __pthread_rwlock_rdlock,.-__pthread_rwlock_rdlock - -strong_alias (__pthread_rwlock_rdlock, pthread_rwlock_rdlock) -hidden_def (__pthread_rwlock_rdlock) |