diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv')
11 files changed, 800 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/Makefile b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/Makefile new file mode 100644 index 000000000..729adf6f9 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/Makefile @@ -0,0 +1,13 @@ +# Makefile for uClibc NPTL +# +# Copyright (C) 2005 Steven J. Hill <sjhill@uclibc.org> +# +# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. +# + +top_srcdir=../../../../../../../ +top_builddir=../../../../../../../ +all: objs +include $(top_builddir)Rules.mak +include Makefile.arch +include $(top_srcdir)Makerules diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/Makefile.arch b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/Makefile.arch new file mode 100644 index 000000000..77707a085 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/Makefile.arch @@ -0,0 +1,8 @@ +# Makefile for uClibc NPTL +# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + +libpthread_linux_arch_SSRC = +libpthread_linux_arch_CSRC = pthread_once.c + +libc_linux_arch_CSRC = fork.c +libc_linux_arch_SSRC = clone.S vfork.S diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/bits/pthreadtypes.h b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/bits/pthreadtypes.h new file mode 100644 index 000000000..9e9e307cf --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/bits/pthreadtypes.h @@ -0,0 +1,181 @@ +/* Copyright (C) 2002-2016 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + 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/>. */ + +#ifndef _BITS_PTHREADTYPES_H +# define _BITS_PTHREADTYPES_H 1 + +# include <endian.h> + +# define __SIZEOF_PTHREAD_ATTR_T 36 +# define __SIZEOF_PTHREAD_MUTEX_T 24 +# define __SIZEOF_PTHREAD_MUTEXATTR_T 4 +# define __SIZEOF_PTHREAD_COND_T 48 +# define __SIZEOF_PTHREAD_COND_COMPAT_T 12 +# define __SIZEOF_PTHREAD_CONDATTR_T 4 +# define __SIZEOF_PTHREAD_RWLOCK_T 32 +# define __SIZEOF_PTHREAD_RWLOCKATTR_T 8 +# define __SIZEOF_PTHREAD_BARRIER_T 20 +# 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; + +union pthread_attr_t +{ + char __size[__SIZEOF_PTHREAD_ATTR_T]; + long int __align; +}; + +# ifndef __have_pthread_attr_t +typedef union pthread_attr_t pthread_attr_t; +# define __have_pthread_attr_t 1 +# endif + +typedef struct __pthread_internal_slist +{ + struct __pthread_internal_slist *__next; +} __pthread_slist_t; + +/* Data structures for mutex handling. The structure of the attribute + type is not exposed on purpose. */ +typedef union +{ + struct __pthread_mutex_s + { + int __lock; + unsigned int __count; + int __owner; + /* KIND must stay at this position in the structure to maintain + binary compatibility. */ + int __kind; + unsigned int __nusers; + __extension__ union + { + int __spins; + __pthread_slist_t __list; + }; + } __data; + char __size[__SIZEOF_PTHREAD_MUTEX_T]; + long int __align; +} pthread_mutex_t; + +/* Mutex __spins initializer used by PTHREAD_MUTEX_INITIALIZER. */ +#define __PTHREAD_SPINS 0 + +typedef union +{ + char __size[__SIZEOF_PTHREAD_MUTEXATTR_T]; + 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 __futex; + __extension__ unsigned long long int __total_seq; + __extension__ unsigned long long int __wakeup_seq; + __extension__ unsigned long long int __woken_seq; + void *__mutex; + unsigned int __nwaiters; + unsigned int __broadcast_seq; + } __data; + char __size[__SIZEOF_PTHREAD_COND_T]; + __extension__ long long int __align; +} pthread_cond_t; + +typedef union +{ + char __size[__SIZEOF_PTHREAD_CONDATTR_T]; + int __align; +} pthread_condattr_t; + +/* Keys for thread-specific data. */ +typedef unsigned int pthread_key_t; + +/* Once-only execution. */ +typedef int pthread_once_t; + +# if defined __USE_UNIX98 || defined __USE_XOPEN2K +/* 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; +# if __BYTE_ORDER == __BIG_ENDIAN + unsigned char __pad1; + unsigned char __pad2; + unsigned char __shared; + /* FLAGS must stay at this position in the structure to maintain + binary compatibility. */ + unsigned char __flags; +# else + /* FLAGS must stay at this position in the structure to maintain + binary compatibility. */ + unsigned char __flags; + unsigned char __shared; + unsigned char __pad1; + unsigned char __pad2; +# endif + int __writer; + } __data; + char __size[__SIZEOF_PTHREAD_RWLOCK_T]; + long int __align; +} pthread_rwlock_t; + +#define __PTHREAD_RWLOCK_ELISION_EXTRA 0 + +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/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/bits/semaphore.h b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/bits/semaphore.h new file mode 100644 index 000000000..ea05026a0 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/bits/semaphore.h @@ -0,0 +1,32 @@ +/* Copyright (C) 2002-2016 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + 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/>. */ + +#ifndef _SEMAPHORE_H +# error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead." +#endif + +#define __SIZEOF_SEM_T 16 + +/* Value returned if `sem_open' failed. */ +#define SEM_FAILED ((sem_t *) 0) + +typedef union +{ + char __size[__SIZEOF_SEM_T]; + long int __align; +} sem_t; diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/clone.S b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/clone.S new file mode 100644 index 000000000..faa78d936 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/clone.S @@ -0,0 +1,4 @@ +#define RESET_PID +#include <tls.h> +#include <tcb-offsets.h> +#include "../../../../../../../libc/sysdeps/linux/microblaze/clone.S" diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/createthread.c b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/createthread.c new file mode 100644 index 000000000..10a9ac39f --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/createthread.c @@ -0,0 +1,22 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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/>. */ + +/* Value passed to 'clone' for initialization of the thread register. */ +#define TLS_VALUE (pd + 1) + +/* Get the real implementation. */ +#include <sysdeps/pthread/createthread.c> diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/fork.c b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/fork.c new file mode 100644 index 000000000..ba5c700da --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/fork.c @@ -0,0 +1,29 @@ +/* Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 <sched.h> +#include <signal.h> +#include <sysdep.h> +#include <tls.h> + + +#define ARCH_FORK() \ + INLINE_SYSCALL (clone, 5, \ + CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, 0, \ + NULL, NULL, &THREAD_SELF->tid) + +#include "../fork.c" diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/lowlevellock.h b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/lowlevellock.h new file mode 100644 index 000000000..e8dce9ddb --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/lowlevellock.h @@ -0,0 +1,278 @@ +/* Copyright (C) 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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; see the file COPYING.LIB. If + not, see <http://www.gnu.org/licenses/>. */ + +#ifndef _LOWLEVELLOCK_H +#define _LOWLEVELLOCK_H 1 + +#include <time.h> +#include <sys/param.h> +#include <bits/pthreadtypes.h> +#include <atomic.h> +#include <sysdep.h> +#include <bits/kernel-features.h> + +#define FUTEX_WAIT 0 +#define FUTEX_WAKE 1 +#define FUTEX_REQUEUE 3 +#define FUTEX_CMP_REQUEUE 4 +#define FUTEX_WAKE_OP 5 +#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1) +#define FUTEX_LOCK_PI 6 +#define FUTEX_UNLOCK_PI 7 +#define FUTEX_TRYLOCK_PI 8 +#define FUTEX_WAIT_BITSET 9 +#define FUTEX_WAKE_BITSET 10 +#define FUTEX_PRIVATE_FLAG 128 +#define FUTEX_CLOCK_REALTIME 256 + +#define FUTEX_BITSET_MATCH_ANY 0xffffffff + +/* Values for 'private' parameter of locking macros. Yes, the + definition seems to be backwards. But it is not. The bit will be + reversed before passing to the system call. */ +#define LLL_PRIVATE 0 +#define LLL_SHARED FUTEX_PRIVATE_FLAG + + +#if !defined NOT_IN_libc || defined IS_IN_rtld +/* In libc.so or ld.so all futexes are private. */ +# ifdef __ASSUME_PRIVATE_FUTEX +# define __lll_private_flag(fl, private) \ + ((fl) | FUTEX_PRIVATE_FLAG) +# else +# define __lll_private_flag(fl, private) \ + ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex)) +# endif +#else +# ifdef __ASSUME_PRIVATE_FUTEX +# define __lll_private_flag(fl, private) \ + (((fl) | FUTEX_PRIVATE_FLAG) ^ (private)) +# else +# define __lll_private_flag(fl, private) \ + (__builtin_constant_p (private) \ + ? ((private) == 0 \ + ? ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex)) \ + : (fl)) \ + : ((fl) | (((private) ^ FUTEX_PRIVATE_FLAG) \ + & THREAD_GETMEM (THREAD_SELF, header.private_futex)))) +# endif +#endif + + +#define lll_futex_wait(futexp, val, private) \ + lll_futex_timed_wait(futexp, val, NULL, private) + +#define lll_futex_timed_wait(futexp, val, timespec, private) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __sysret; \ + __sysret = INTERNAL_SYSCALL (futex, __err, 4, (futexp), \ + __lll_private_flag (FUTEX_WAIT, private), \ + (val), (timespec)); \ + __sysret; \ + }) + +#define lll_futex_wake(futexp, nr, private) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __sysret; \ + __sysret = INTERNAL_SYSCALL (futex, __err, 4, (futexp), \ + __lll_private_flag (FUTEX_WAKE, private), \ + (nr), 0); \ + __sysret; \ + }) + +#define lll_robust_dead(futexv, private) \ + do \ + { \ + int *__futexp = &(futexv); \ + atomic_or (__futexp, FUTEX_OWNER_DIED); \ + lll_futex_wake (__futexp, 1, private); \ + } \ + while (0) + +/* Returns non-zero if error happened, zero if success. */ +#define lll_futex_requeue(futexp, nr_wake, nr_move, mutex, val, private) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __sysret; \ + __sysret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \ + __lll_private_flag (FUTEX_CMP_REQUEUE, private),\ + (nr_wake), (nr_move), (mutex), (val)); \ + INTERNAL_SYSCALL_ERROR_P (__sysret, __err); \ + }) + + +/* Returns non-zero if error happened, zero if success. */ +#define lll_futex_wake_unlock(futexp, nr_wake, nr_wake2, futexp2, private) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __sysret; \ + __sysret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \ + __lll_private_flag (FUTEX_WAKE_OP, private), \ + (nr_wake), (nr_wake2), (futexp2), \ + FUTEX_OP_CLEAR_WAKE_IF_GT_ONE); \ + INTERNAL_SYSCALL_ERROR_P (__sysret, __err); \ + }) + + +#define lll_trylock(lock) \ + atomic_compare_and_exchange_val_acq(&(lock), 1, 0) + +#define lll_cond_trylock(lock) \ + atomic_compare_and_exchange_val_acq(&(lock), 2, 0) + +#define __lll_robust_trylock(futex, id) \ + (atomic_compare_and_exchange_val_acq (futex, id, 0) != 0) +#define lll_robust_trylock(lock, id) \ + __lll_robust_trylock (&(lock), id) + +extern void __lll_lock_wait_private (int *futex) attribute_hidden; +extern void __lll_lock_wait (int *futex, int private) attribute_hidden; +extern int __lll_robust_lock_wait (int *futex, int private) attribute_hidden; + +#define __lll_lock(futex, private) \ + ((void) ({ \ + int *__futex = (futex); \ + if (unlikely(atomic_compare_and_exchange_val_acq (__futex, 1, 0))) \ + { \ + if (__builtin_constant_p (private) && (private) == LLL_PRIVATE) \ + __lll_lock_wait_private (__futex); \ + else \ + __lll_lock_wait (__futex, private); \ + } \ + })) +#define lll_lock(futex, private) __lll_lock (&(futex), private) + + +#define __lll_robust_lock(futex, id, private) \ + ({ \ + int *__futex = (futex); \ + int __val = 0; \ + \ + if (unlikely(atomic_compare_and_exchange_bool_acq (__futex, id, 0))) \ + __val = __lll_robust_lock_wait (__futex, private); \ + __val; \ + }) +#define lll_robust_lock(futex, id, private) \ + __lll_robust_lock (&(futex), id, private) + + +#define __lll_cond_lock(futex, private) \ + ((void) ({ \ + int *__futex = (futex); \ + if (unlikely(atomic_exchange_acq (__futex, 2))) \ + __lll_lock_wait (__futex, private); \ + })) +#define lll_cond_lock(futex, private) __lll_cond_lock (&(futex), private) + + +#define lll_robust_cond_lock(futex, id, private) \ + __lll_robust_lock (&(futex), (id) | FUTEX_WAITERS, private) + + +extern int __lll_timedlock_wait (int *futex, const struct timespec *, + int private) attribute_hidden; +extern int __lll_robust_timedlock_wait (int *futex, const struct timespec *, + int private) attribute_hidden; + +#define __lll_timedlock(futex, abstime, private) \ + ({ \ + int *__futex = (futex); \ + int __val = 0; \ + \ + if (unlikely(atomic_exchange_acq (__futex, 1))) \ + __val = __lll_timedlock_wait (__futex, abstime, private); \ + __val; \ + }) +#define lll_timedlock(futex, abstime, private) \ + __lll_timedlock (&(futex), abstime, private) + + +#define __lll_robust_timedlock(futex, abstime, id, private) \ + ({ \ + int *__futex = (futex); \ + int __val = 0; \ + \ + if (unlikely(atomic_compare_and_exchange_bool_acq (__futex, id, 0))) \ + __val = __lll_robust_timedlock_wait (__futex, abstime, private); \ + __val; \ + }) +#define lll_robust_timedlock(futex, abstime, id, private) \ + __lll_robust_timedlock (&(futex), abstime, id, private) + + +#define __lll_unlock(futex, private) \ + (void) \ + ({ int *__futex = (futex); \ + int __oldval = atomic_exchange_rel (__futex, 0); \ + if (unlikely(__oldval > 1)) \ + lll_futex_wake (__futex, 1, private); \ + }) +#define lll_unlock(futex, private) __lll_unlock(&(futex), private) + + +#define __lll_robust_unlock(futex, private) \ + (void) \ + ({ int *__futex = (futex); \ + int __oldval = atomic_exchange_rel (__futex, 0); \ + if (unlikely(__oldval & FUTEX_WAITERS)) \ + lll_futex_wake (__futex, 1, private); \ + }) +#define lll_robust_unlock(futex, private) \ + __lll_robust_unlock(&(futex), private) + + +#define lll_islocked(futex) \ + (futex != 0) + + +/* Our internal lock implementation is identical to the binary-compatible + mutex implementation. */ + +/* Initializers for lock. */ +#define LLL_LOCK_INITIALIZER (0) +#define LLL_LOCK_INITIALIZER_LOCKED (1) + +/* The states of a lock are: + 0 - untaken + 1 - taken by one user + >1 - taken by more users */ + +/* The kernel notifies a process which uses CLONE_CLEARTID via futex + wakeup when the clone terminates. The memory location contains the + thread ID while the clone is running and is reset to zero + afterwards. */ +#define lll_wait_tid(tid) \ + do { \ + __typeof (tid) __tid; \ + while ((__tid = (tid)) != 0) \ + lll_futex_wait (&(tid), __tid, LLL_SHARED);\ + } while (0) + +extern int __lll_timedwait_tid (int *, const struct timespec *) + attribute_hidden; + +#define lll_timedwait_tid(tid, abstime) \ + ({ \ + int __res = 0; \ + if ((tid) != 0) \ + __res = __lll_timedwait_tid (&(tid), (abstime)); \ + __res; \ + }) + +#endif /* lowlevellock.h */ diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/pthread_once.c b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/pthread_once.c new file mode 100644 index 000000000..46085d3b5 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/pthread_once.c @@ -0,0 +1,89 @@ +/* Copyright (C) 2004-2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 "pthreadP.h" +#include <lowlevellock.h> + +unsigned long int __fork_generation attribute_hidden; + +static void +clear_once_control (void *arg) +{ + pthread_once_t *once_control = (pthread_once_t *) arg; + + *once_control = 0; + lll_futex_wake (once_control, INT_MAX, LLL_PRIVATE); +} + +int +__pthread_once (pthread_once_t *once_control, void (*init_routine) (void)) +{ + for (;;) + { + int oldval; + int newval; + + /* Pseudo code: + newval = __fork_generation | 1; + oldval = *once_control; + if ((oldval & 2) == 0) + *once_control = newval; + Do this atomically. + */ + do + { + newval = __fork_generation | 1; + oldval = *once_control; + if (oldval & 2) + break; + } while (atomic_compare_and_exchange_val_acq (once_control, newval, oldval) != oldval); + + /* Check if the initializer has already been done. */ + if ((oldval & 2) != 0) + return 0; + + /* Check if another thread already runs the initializer. */ + if ((oldval & 1) == 0) + break; + + /* Check whether the initializer execution was interrupted by a fork. */ + if (oldval != newval) + break; + + /* Same generation, some other thread was faster. Wait. */ + lll_futex_wait (once_control, oldval, LLL_PRIVATE); + } + + /* This thread is the first here. Do the initialization. + Register a cleanup handler so that in case the thread gets + interrupted the initialization can be restarted. */ + pthread_cleanup_push (clear_once_control, once_control); + + init_routine (); + + pthread_cleanup_pop (0); + + /* Say that the initialisation is done. */ + *once_control = __fork_generation | 2; + + /* Wake up all other threads. */ + lll_futex_wake (once_control, INT_MAX, LLL_PRIVATE); + + return 0; +} +weak_alias (__pthread_once, pthread_once) +strong_alias (__pthread_once, __pthread_once_internal) diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h new file mode 100644 index 000000000..2af79cab5 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h @@ -0,0 +1,139 @@ +/* Copyright (C) 2014-2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 <tls.h> +#ifndef __ASSEMBLER__ +# include <pthreadP.h> +#endif + +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt + +#ifdef __ASSEMBLER__ + +#undef ret +#define ret + +# if !IS_IN_librt || !defined(PIC) +# define AC_STACK_SIZE 16 /* space for r15, async_cancel arg and 2 temp words */ +# define AC_SET_GOT /* empty */ +# define AC_RESTORE_GOT /* empty */ +# else +# define AC_STACK_SIZE 20 /* extra 4 bytes for r20 */ +# define AC_SET_GOT \ + swi r20, r1, AC_STACK_SIZE-4; \ + mfs r20, rpc; \ + addik r20, r20, _GLOBAL_OFFSET_TABLE_+8; +# define AC_RESTORE_GOT \ + lwi r20, r1, AC_STACK_SIZE-4; +# endif + +# undef PSEUDO +# define PSEUDO(name, syscall_name, args) \ + .text; \ + ENTRY (name) \ + SINGLE_THREAD_P(r12); \ + bnei r12, L(pseudo_cancel); \ + .globl __##syscall_name##_nocancel; \ + .type __##syscall_name##_nocancel,@function; \ +__##syscall_name##_nocancel: \ + DO_CALL (syscall_name, args); \ + addik r4, r0, -4095; \ + cmpu r4, r4, r3; \ + rsubk r3,r3,r0; \ + rtsd r15,8; \ + addik r3,r0,-1; \ + rtsd r15, 8; \ + nop; \ + .size __##syscall_name##_nocancel, .-__##syscall_name##_nocancel; \ +L(pseudo_cancel): \ + addik r1, r1, -AC_STACK_SIZE; \ + swi r15, r1, 0; \ + AC_SET_GOT \ + DOCARGS_##args \ + CENABLE; \ + swi r3, r1, 8; \ + UNDOCARGS_##args \ + DO_CALL (syscall_name, args); \ + swi r3, r1, 12; \ + lwi r5, r1, 8; \ + CDISABLE; \ + lwi r3, r1, 12; \ + lwi r15, r1, 0; \ + AC_RESTORE_GOT \ + addik r1, r1, AC_STACK_SIZE; \ + addik r4, r0, -4095; \ + cmpu r4, r4, r3; \ + rsubk r3,r3,r0; \ + rtsd r15,8; \ + addik r3,r0,-1; \ + rtsd r15, 8; \ + nop; + +/* + * Macros to save/restore syscall arguments across CENABLE + * The arguments are saved into the caller's stack (original r1 + 4) + */ + +# define DOCARGS_0 +# define DOCARGS_1 swi r5, r1, AC_STACK_SIZE + 4; +# define DOCARGS_2 swi r6, r1, AC_STACK_SIZE + 8; DOCARGS_1 +# define DOCARGS_3 swi r7, r1, AC_STACK_SIZE + 12; DOCARGS_2 +# define DOCARGS_4 swi r8, r1, AC_STACK_SIZE + 16; DOCARGS_3 +# define DOCARGS_5 swi r9, r1, AC_STACK_SIZE + 20; DOCARGS_4 +# define DOCARGS_6 swi r10, r1, AC_STACK_SIZE + 24; DOCARGS_5 + +# define UNDOCARGS_0 +# define UNDOCARGS_1 lwi r5, r1, AC_STACK_SIZE + 4; +# define UNDOCARGS_2 UNDOCARGS_1 lwi r6, r1, AC_STACK_SIZE + 8; +# define UNDOCARGS_3 UNDOCARGS_2 lwi r7, r1, AC_STACK_SIZE + 12; +# define UNDOCARGS_4 UNDOCARGS_3 lwi r8, r1, AC_STACK_SIZE + 16; +# define UNDOCARGS_5 UNDOCARGS_4 lwi r9, r1, AC_STACK_SIZE + 20; +# define UNDOCARGS_6 UNDOCARGS_5 lwi r10, r1, AC_STACK_SIZE + 24; + +# ifdef PIC +# define PSEUDO_JMP(sym) brlid r15, sym##@PLTPC; addk r0, r0, r0 +# else +# define PSEUDO_JMP(sym) brlid r15, sym; addk r0, r0, r0 +# endif + +# if defined IS_IN_libpthread +# define CENABLE PSEUDO_JMP (__pthread_enable_asynccancel) +# define CDISABLE PSEUDO_JMP (__pthread_disable_asynccancel) +# define __local_multiple_threads __pthread_multiple_threads +# elif !defined NOT_IN_libc +# define CENABLE PSEUDO_JMP (__libc_enable_asynccancel) +# define CDISABLE PSEUDO_JMP (__libc_disable_asynccancel) +# define __local_multiple_threads __libc_multiple_threads +# elif defined IS_IN_librt +# define CENABLE PSEUDO_JMP (__librt_enable_asynccancel) +# define CDISABLE PSEUDO_JMP (__librt_disable_asynccancel) +# else +# error Unsupported library +# endif + +#define SINGLE_THREAD_P(reg) \ + lwi reg, r0, MULTIPLE_THREADS_OFFSET(reg) + +#else /* !__ASSEMBLER__ */ +# define SINGLE_THREAD_P \ + __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ + header.multiple_threads) == 0, 1) + +#endif /* __ASSEMBLER__ */ + +#endif diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/vfork.S b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/vfork.S new file mode 100644 index 000000000..433671717 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/microblaze/vfork.S @@ -0,0 +1,5 @@ +#define SAVE_PID +#define RESTORE_PID +#include <tls.h> +#include <tcb-offsets.h> +#include <libc/sysdeps/linux/microblaze/vfork.S> |