diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux')
13 files changed, 1105 insertions, 2 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/lowlevellock.c b/libpthread/nptl/sysdeps/unix/sysv/linux/lowlevellock.c index 2a5bf6dd9..75369bd70 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/lowlevellock.c +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/lowlevellock.c @@ -22,8 +22,6 @@ #include <lowlevellock.h> #include <sys/time.h> #include <tls.h> -#include <tcb-offsets.h> - void #ifndef IS_IN_libpthread diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/Makefile.arch b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/Makefile.arch new file mode 100644 index 000000000..8ebe28773 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/Makefile.arch @@ -0,0 +1,15 @@ +# uClibc-ng project +# Licensed under the LGPL v2.1, see the file COPYING and LICENSE. + +libc_linux_arch_CSRC = fork.c +libc_linux_arch_SSRC = clone.S vfork.S +libpthread_linux_arch_CSRC = pthread_once.c +libpthread_linux_arch_SSRC = + +CFLAGS-OMIT-fork.c = -DNOT_IN_libc -DIS_IN_libpthread +ASFLAGS-pt-vfork.S = -DNOT_IN_libc -DIS_IN_libpthread -D_LIBC_REENTRANT + +ASFLAGS-clone.S = -D_LIBC_REENTRANT +ASFLAGS-vfork.S = -D_LIBC_REENTRANT +ASFLAGS-syscall.S = -D_LIBC_REENTRANT +ASFLAGS-mmap.S = -D_LIBC_REENTRANT diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/pthreadtypes.h b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/pthreadtypes.h new file mode 100644 index 000000000..5e4402088 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/pthreadtypes.h @@ -0,0 +1,184 @@ +/* Copyright (C) 2002-2012 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; + +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 __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]; + 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; + + +#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; + +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/xtensa/bits/semaphore.h b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/semaphore.h new file mode 100644 index 000000000..8845cf009 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/semaphore.h @@ -0,0 +1,35 @@ +/* Copyright (C) 2012 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#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/xtensa/clone.S b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/clone.S new file mode 100644 index 000000000..539b9ef38 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/clone.S @@ -0,0 +1,3 @@ +#define RESET_PID +#include <tcb-offsets.h> +#include <libc/sysdeps/linux/xtensa/clone.S> diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/createthread.c b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/createthread.c new file mode 100644 index 000000000..2bb96e91a --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/createthread.c @@ -0,0 +1,24 @@ +/* Copyright (C) 2012 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* 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/xtensa/fork.c b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/fork.c new file mode 100644 index 000000000..ba5c700da --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/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/xtensa/lowlevellock.c b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.c new file mode 100644 index 000000000..756f39fd4 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.c @@ -0,0 +1,132 @@ +/* low level locking for pthread library. Generic futex-using version. + Copyright (C) 2003-2013 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 <errno.h> +#include <sysdep.h> +#include <lowlevellock.h> +#include <sys/time.h> + +void +__lll_lock_wait_private (int *futex) +{ + do + { + int oldval = atomic_compare_and_exchange_val_acq (futex, 2, 1); + if (oldval != 0) + lll_futex_wait (futex, 2, LLL_PRIVATE); + } + while (atomic_compare_and_exchange_bool_acq (futex, 2, 0) != 0); +} + + +/* These functions don't get included in libc.so */ +#ifdef IS_IN_libpthread +void +__lll_lock_wait (int *futex, int private) +{ + do + { + int oldval = atomic_compare_and_exchange_val_acq (futex, 2, 1); + if (oldval != 0) + lll_futex_wait (futex, 2, private); + } + while (atomic_compare_and_exchange_bool_acq (futex, 2, 0) != 0); +} + + +int +__lll_timedlock_wait (int *futex, const struct timespec *abstime, int private) +{ + struct timespec rt; + + /* Reject invalid timeouts. */ + if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000) + return EINVAL; + + /* Upgrade the lock. */ + if (atomic_exchange_acq (futex, 2) == 0) + return 0; + + do + { + struct timeval tv; + + /* Get the current time. */ + (void) __gettimeofday (&tv, NULL); + + /* Compute relative timeout. */ + rt.tv_sec = abstime->tv_sec - tv.tv_sec; + rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000; + if (rt.tv_nsec < 0) + { + rt.tv_nsec += 1000000000; + --rt.tv_sec; + } + + /* Already timed out? */ + if (rt.tv_sec < 0) + return ETIMEDOUT; + + // XYZ: Lost the lock to check whether it was private. + lll_futex_timed_wait (futex, 2, &rt, private); + } + while (atomic_compare_and_exchange_bool_acq (futex, 2, 0) != 0); + + return 0; +} + + +int +__lll_timedwait_tid (int *tidp, const struct timespec *abstime) +{ + int tid; + + if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000) + return EINVAL; + + /* Repeat until thread terminated. */ + while ((tid = *tidp) != 0) + { + struct timeval tv; + struct timespec rt; + + /* Get the current time. */ + (void) __gettimeofday (&tv, NULL); + + /* Compute relative timeout. */ + rt.tv_sec = abstime->tv_sec - tv.tv_sec; + rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000; + if (rt.tv_nsec < 0) + { + rt.tv_nsec += 1000000000; + --rt.tv_sec; + } + + /* Already timed out? */ + if (rt.tv_sec < 0) + return ETIMEDOUT; + + /* Wait until thread terminates. */ + // XYZ: Lost the lock to check whether it was private. + if (lll_futex_timed_wait (tidp, tid, &rt, LLL_SHARED) == -ETIMEDOUT) + return ETIMEDOUT; + } + + return 0; +} +#endif diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.h b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.h new file mode 100644 index 000000000..abe6e9c37 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.h @@ -0,0 +1,293 @@ +/* Copyright (C) 2005-2013 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/>. */ + +#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 __ret; \ + __ret = INTERNAL_SYSCALL (futex, __err, 4, (futexp), \ + __lll_private_flag (FUTEX_WAIT, private), \ + (val), (timespec)); \ + __ret; \ + }) + +#define lll_futex_timed_wait_bitset(futexp, val, timespec, clockbit, private) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __ret; \ + int __op = FUTEX_WAIT_BITSET | clockbit; \ + __ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \ + __lll_private_flag (__op, private), \ + (val), (timespec), NULL /* Unused. */, \ + FUTEX_BITSET_MATCH_ANY); \ + __ret; \ + }) + +#define lll_futex_wake(futexp, nr, private) \ + ({ \ + INTERNAL_SYSCALL_DECL (__err); \ + long int __ret; \ + __ret = INTERNAL_SYSCALL (futex, __err, 4, (futexp), \ + __lll_private_flag (FUTEX_WAKE, private), \ + (nr), 0); \ + __ret; \ + }) + +#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 __ret; \ + __ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \ + __lll_private_flag (FUTEX_CMP_REQUEUE, private),\ + (nr_wake), (nr_move), (mutex), (val)); \ + INTERNAL_SYSCALL_ERROR_P (__ret, __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 __ret; \ + __ret = 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 (__ret, __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 (__builtin_expect (atomic_compare_and_exchange_val_acq (__futex, \ + 1, 0), 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 (__builtin_expect (atomic_compare_and_exchange_bool_acq (__futex, id, \ + 0), 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 (__builtin_expect (atomic_exchange_acq (__futex, 2), 0)) \ + __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 (__builtin_expect (atomic_exchange_acq (__futex, 1), 0)) \ + __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 (__builtin_expect (atomic_compare_and_exchange_bool_acq (__futex, id, \ + 0), 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 (__builtin_expect (__oldval > 1, 0)) \ + 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 (__builtin_expect (__oldval & FUTEX_WAITERS, 0)) \ + 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_CHILD_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/xtensa/pt-initfini.c b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pt-initfini.c new file mode 100644 index 000000000..4e6d26e81 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pt-initfini.c @@ -0,0 +1,134 @@ +/* Special .init and .fini section support. Linuxthread version. + Copyright (C) 1995,1996,1997,2000,2001,2002 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 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file with other + programs, and to distribute those programs without any restriction + coming from the use of this file. (The Library General Public + License restrictions do apply in other respects; for example, they + cover modification of the file, and distribution when not linked + into another program.) + + 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/>. */ + +/* This file is compiled into assembly code which is then munged by a sed + script into two files: crti.s and crtn.s. + + * crti.s puts a function prologue at the beginning of the + .init and .fini sections and defines global symbols for + those addresses, so they can be called as functions. + + * crtn.s puts the corresponding function epilogues + in the .init and .fini sections. */ + +#include <stdlib.h> + +/* We use embedded asm for .section unconditionally, as this makes it + easier to insert the necessary directives into crtn.S. */ +#define SECTION(x) __asm__ (".section " x ) + +/* Embed an #include to pull in the alignment and .end directives. */ +__asm__ ("\n#include \"defs.h\""); +__asm__ ("\n#if defined __i686 && defined __ASSEMBLER__"); +__asm__ ("\n#undef __i686"); +__asm__ ("\n#define __i686 __i686"); +__asm__ ("\n#endif"); + +/* The initial common code ends here. */ +__asm__ ("\n/*@HEADER_ENDS*/"); + +/* To determine whether we need .end and .align: */ +__asm__ ("\n/*@TESTS_BEGIN*/"); +extern void dummy (void (*foo) (void)); +void +dummy (void (*foo) (void)) +{ + if (foo) + (*foo) (); +} +__asm__ ("\n/*@TESTS_END*/"); + +/* The beginning of _init: */ +__asm__ ("\n/*@_init_PROLOG_BEGINS*/"); + +static void +call_initialize_minimal (void) +{ + extern void __pthread_initialize_minimal_internal (void) + __attribute ((visibility ("hidden"))); + + __pthread_initialize_minimal_internal (); +} + +SECTION (".init"); +extern void __attribute__ ((section (".init"))) _init (void); +void +_init (void) +{ + /* The very first thing we must do is to set up the registers. */ + call_initialize_minimal (); + + __asm__ ("ALIGN"); + __asm__("END_INIT"); + /* Now the epilog. */ + __asm__ ("\n/*@_init_PROLOG_ENDS*/"); + __asm__ ("\n/*@_init_EPILOG_BEGINS*/"); + SECTION(".init"); +} +__asm__ ("END_INIT"); + +/* End of the _init epilog, beginning of the _fini prolog. */ +__asm__ ("\n/*@_init_EPILOG_ENDS*/"); +__asm__ ("\n/*@_fini_PROLOG_BEGINS*/"); + +SECTION (".fini"); +extern void __attribute__ ((section (".fini"))) _fini (void); +void +_fini (void) +{ + + /* End of the _fini prolog. */ + __asm__ ("ALIGN"); + __asm__ ("END_FINI"); + __asm__ ("\n/*@_fini_PROLOG_ENDS*/"); + + /* Xtensa: It doesn't really matter whether GCC thinks this is a leaf + function or not, and the scripts that are supposed to remove the + call don't catch the literal, resulting in an undefined symbol + reference. */ +#if 0 + { + /* Let GCC know that _fini is not a leaf function by having a dummy + function call here. We arrange for this call to be omitted from + either crt file. */ + extern void i_am_not_a_leaf (void); + i_am_not_a_leaf (); + } +#endif + + /* Beginning of the _fini epilog. */ + __asm__ ("\n/*@_fini_EPILOG_BEGINS*/"); + SECTION (".fini"); +} +__asm__ ("END_FINI"); + +/* End of the _fini epilog. Any further generated assembly (e.g. .ident) + is shared between both crt files. */ +__asm__ ("\n/*@_fini_EPILOG_ENDS*/"); +__asm__ ("\n/*@TRAILER_BEGINS*/"); + +/* End of file. */ diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pthread_once.c b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pthread_once.c new file mode 100644 index 000000000..46085d3b5 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/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/xtensa/sysdep-cancel.h b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/sysdep-cancel.h new file mode 100644 index 000000000..6bb2aeb56 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/sysdep-cancel.h @@ -0,0 +1,108 @@ +/* Copyright (C) 2003 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <tls.h> +/* #include <pt-machine.h> */ +#ifndef __ASSEMBLER__ +# include <pthreadP.h> +#endif + +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt +// FIXME: ENTRY includes an entry instruction, here we'd want entry sp, 48! +# undef PSEUDO +# define PSEUDO(name, syscall_name, args) \ + .text; \ + ENTRY (name) \ + SINGLE_THREAD_P(a15); \ + bnez a15, .Lpseudo_cancel; \ + DO_CALL (syscall_name, args); \ + bgez a2, .Lpseudo_done; \ + movi a4, -4095; \ + blt a2, a4, .Lpseudo_done; \ + j SYSCALL_ERROR_LABEL; \ + .Lpseudo_done: \ + retw; \ + .Lpseudo_cancel: \ + /* The syscall args are in a2...a7; no need to save */ \ + CENABLE; \ + /* The return value is in a10 and preserved across the syscall */ \ + DO_CALL (syscall_name, args); \ + CDISABLE; \ + bgez a2, .Lpseudo_end; \ + movi a4, -4095; \ + blt a2, a4, .Lpseudo_end; \ + j SYSCALL_ERROR_LABEL; \ + .Lpseudo_end: + + +# ifdef IS_IN_libpthread +# define CENABLE_FUNC __pthread_enable_asynccancel +# define CDISABLE_FUNC __pthread_disable_asynccancel +# define __local_multiple_threads __pthread_multiple_threads +# elif !defined NOT_IN_libc +# define CENABLE_FUNC __libc_enable_asynccancel +# define CDISABLE_FUNC __libc_disable_asynccancel +# define __local_multiple_threads __libc_multiple_threads +# elif defined IS_IN_librt +# define CENABLE_FUNC __librt_enable_asynccancel +# define CDISABLE_FUNC __librt_disable_asynccancel +# else +# error Unsupported library +# endif + +# define CENABLE movi a8, CENABLE_FUNC; \ + callx8 a8 +# define CDISABLE movi a8, CDISABLE_FUNC; \ + callx8 a8 + +# if defined IS_IN_libpthread || !defined NOT_IN_libc +# ifndef __ASSEMBLER__ +extern int __local_multiple_threads attribute_hidden; +# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1) +# else +# define SINGLE_THREAD_P(reg) movi reg, __local_multiple_threads; \ + l32i reg, reg, 0; +# endif + +# else +# ifndef __ASSEMBLER__ +# define SINGLE_THREAD_P \ + __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ + header.multiple_threads) == 0, 1) +# else +# define SINGLE_THREAD_P(reg) \ + rur reg, threadptr; \ + l32i reg, reg, MULTIPLE_THREADS_OFFSET; +# endif +# endif + +#else + +/* This code should never be used but we define it anyhow. */ +# define SINGLE_THREAD_P (1) +# define NO_CANCELLATION 1 + +#endif + + +#ifndef __ASSEMBLER__ +# define RTLD_SINGLE_THREAD_P \ + __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ + header.multiple_threads) == 0, 1) +#endif diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/vfork.S b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/vfork.S new file mode 100644 index 000000000..46eb76dd6 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/vfork.S @@ -0,0 +1,59 @@ +/* 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 <tls.h> + +/* + Save the PID value, save 0x80000000 if PID was 0. + Registers a2 and a3 are available; ar should return the PID and as threadptr + */ + +#define SAVE_PID(pid,tp,ar,as) \ + rur tp, threadptr; \ + movi ar, TLS_PRE_TCB_SIZE; \ + sub tp, tp, ar; \ + l32i pid, tp, PID; \ + neg ar, pid; \ + movi as, 0x80000000; \ + moveqz ar, as, ar; \ + s32i ar, tp, PID; \ + +/* + Restore the PID value, restore to 0 if saved value was 0x80000000 + Return value from the syscall is in a2. + */ +#define RESTORE_PID(pid,tp,res) \ + beqz res, 1f; \ + s32i pid, tp, PID; \ +1: + +/* + Special version for call12, where we don't have enough registers + available to preserve the original PID. + */ +#define RESTORE_PID12(ar, as, at) \ + rur as, threadptr; \ + movi ar, TLS_PRE_TCB_SIZE; \ + sub as, as, ar; \ + l32i ar, as, PID; \ + movi at, 0x80000000; \ + sub at, at, ar; \ + neg ar, ar; \ + moveqz ar, at, at; \ + s32i ar, as, PID; + +#include <libc/sysdeps/linux/xtensa/vfork.S> |