diff options
| -rw-r--r-- | nptl/ChangeLog | 8 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h | 151 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pt-vfork.S | 1 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S | 138 |
4 files changed, 298 insertions, 0 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog index b7cb65f..96a1e74 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -1,3 +1,11 @@ +2002-11-28 Ulrich Drepper <drepper@redhat.com> + + * sysdeps/unix/sysv/linux/x86_64/pthread_once.S: New file. + + * sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h: New file. + + * sysdeps/unix/sysv/linux/x86_64/pt-vfork.S: New file. + 2002-11-27 Ulrich Drepper <drepper@redhat.com> * sysdeps/x86_64/bits/atomic.h: New file. diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h b/nptl/sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h new file mode 100644 index 0000000..95dd3c5 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h @@ -0,0 +1,151 @@ +/* Copyright (C) 2002 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _BITS_PTHREADTYPES_H +#define _BITS_PTHREADTYPES_H 1 + +#define __SIZEOF_PTHREAD_ATTR_T 56 +#define __SIZEOF_PTHREAD_MUTEX_T 40 +#define __SIZEOF_PTHREAD_MUTEXATTR_T 4 +#define __SIZEOF_PTHREAD_COND_T 24 +#define __SIZEOF_PTHREAD_CONDATTR_T 4 +#define __SIZEOF_PTHREAD_RWLOCK_T 56 +#define __SIZEOF_PTHREAD_RWLOCKATTR_T 8 +#define __SIZEOF_PTHREAD_BARRIER_T 32 +#define __SIZEOF_PTHREAD_BARRIERATTR_T 4 + + +/* Thread identifiers. The structure of the attribute type is not + exposed on purpose. */ +typedef unsigned long int pthread_t; + + +typedef union +{ + char __size[__SIZEOF_PTHREAD_ATTR_T]; + long int __align; +} pthread_attr_t; + + +/* Data structures for mutex handling. The structure of the attribute + type is not exposed on purpose. */ +typedef union +{ + struct + { + int __lock; + unsigned int __count; + struct pthread *__owner; + /* KIND must stay at this position in the structure to maintain + binary compatibility. */ + int __kind; + } __data; + char __size[__SIZEOF_PTHREAD_MUTEX_T]; + long int __align; +} pthread_mutex_t; + +typedef union +{ + char __size[__SIZEOF_PTHREAD_MUTEXATTR_T]; + long int __align; +} pthread_mutexattr_t; + + +/* Data structure for conditional variable handling. The structure of + the attribute type is not exposed on purpose. */ +typedef union +{ + struct + { + int __lock; + unsigned int __nr_wakers; + unsigned int __nr_sleepers; + } __data; + char __size[__SIZEOF_PTHREAD_COND_T]; + long int __align; +} pthread_cond_t; + +typedef union +{ + char __size[__SIZEOF_PTHREAD_CONDATTR_T]; + long int __align; +} pthread_condattr_t; + + +/* Keys for thread-specific data */ +typedef unsigned int pthread_key_t; + + +/* Once-only execution */ +typedef int pthread_once_t; + + +#ifdef __USE_UNIX98 +/* Data structure for read-write lock variable handling. The + structure of the attribute type is not exposed on purpose. */ +typedef union +{ + struct + { + int __lock; + unsigned int __nr_readers; + unsigned int __readers_wakeup; + unsigned int __writer_wakeup; + unsigned int __nr_readers_queued; + unsigned int __nr_writers_queued; + pthread_t __writer; + unsigned long int __unused; + /* FLAGS must stay at this position in the structure to maintain + binary compatibility. */ + unsigned int __flags; + } __data; + char __size[__SIZEOF_PTHREAD_RWLOCK_T]; + long int __align; +} pthread_rwlock_t; + +typedef union +{ + char __size[__SIZEOF_PTHREAD_RWLOCKATTR_T]; + long int __align; +} pthread_rwlockattr_t; +#endif + + +#ifdef __USE_XOPEN2K +/* POSIX spinlock data type. */ +typedef volatile int pthread_spinlock_t; + + +/* POSIX barriers data type. The structure of the type is + deliberately not exposed. */ +typedef union +{ + char __size[__SIZEOF_PTHREAD_BARRIER_T]; + long int __align; +} pthread_barrier_t; + +typedef union +{ + char __size[__SIZEOF_PTHREAD_BARRIERATTR_T]; + int __align; +} pthread_barrierattr_t; +#endif + + +#endif /* bits/pthreadtypes.h */ diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pt-vfork.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pt-vfork.S new file mode 100644 index 0000000..41ae251 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pt-vfork.S @@ -0,0 +1 @@ +#include <sysdeps/unix/sysv/linux/x86_64/vfork.S> diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S new file mode 100644 index 0000000..4224129 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S @@ -0,0 +1,138 @@ +/* Copyright (C) 2002 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef UP +# define LOCK lock +#else +# define LOCK +#endif + +#define SYS_futex 202 +#define FUTEX_WAKE 1 + + .comm __fork_generation, 4, 4 + + .text + + + .globl __pthread_once + .type __pthread_once,@function + .align 16 +__pthread_once: + testl $2, (%rdi) + jz 1f + xorl %eax, %eax +0: ret + +1: xorq %rsi, %rsi + + /* Not yet initialized or initialization in progress. + Get the fork generation counter now. */ +6: movl (%rdi), %eax + +5: movq %rax, %rdx + + testl $2, %eax + jnz 0b + + andl $3, %edx + orl __fork_generation(%rip), %edx + orl $1, %edx + + LOCK + cmpxchgl %edx, (%rdi) + jnz 5b + + /* Check whether another thread already runs the initializer. */ + testl $1, %eax + jz 3f /* No -> do it. */ + + /* Check whether the initializer execution was interrupted + by a fork. */ + xorl %edx, %eax + testl $0xfffffffc, %eax + jnz 3f /* Different for generation -> run initializer. */ + + /* Somebody else got here first. Wait. */ + movq %rsi, %rcx /* movl $FUTEX_WAIT, %ecx */ + movl $SYS_futex, %eax + syscall + jmp 6b + + /* Preserve the pointer to the control variable. */ +3: pushq %rdi + + /* Call the initializer function after setting up the + cancellation handler. */ + subq $32, %rsp + + /* Push the cleanup handler. */ + leaq clear_once_control(%rip), %rsi + movq %rdi, %rdx + movq %rsp, %rdi + call _GI_pthread_cleanup_push /* Note: no @PLT. */ + + movq 48(%rsp), %rax + call *%rax + + /* Pop the cleanup handler. This code depends on the once + handler and _pthread_cleanup_push not touch the content + of the stack. Otherwise the first parameter would have + to be reloaded. */ + xorq %rdi, %rdi + call _GI_pthread_cleanup_pop /* Note: no @PLT. */ + + addq $32, %rsp + + /* Get the control variable address back. */ + popq %rdi + + /* Sucessful run of the initializer. Signal that we are done. */ + LOCK + incl (%rdi) + + /* Wake up all other threads. */ + movl $0x7fffffff, %edx + movl $FUTEX_WAKE, %esi + xorq %rcx, %rcx + movl $SYS_futex, %eax + syscall + +4: xorq %rax, %rax + ret + + .size __pthread_once,.-__pthread_once + + .globl pthread_once +pthread_once = __pthread_once + + + .type clear_once_control,@function + .align 16 +clear_once_control: + movl $0, (%rdi) + + xorq %rcx, %rcx + movl $0x7fffffff, %edx + movl $FUTEX_WAKE, %esi + movl $SYS_futex, %eax + syscall + + ret + .size clear_once_control,.-clear_once_control |