diff options
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/sparc')
| -rw-r--r-- | libpthread/linuxthreads/sysdeps/sparc/pspinlock.c | 87 | ||||
| -rw-r--r-- | libpthread/linuxthreads/sysdeps/sparc/tcb-offsets.h | 1 | ||||
| -rw-r--r-- | libpthread/linuxthreads/sysdeps/sparc/tcb-offsets.sym | 4 | ||||
| -rw-r--r-- | libpthread/linuxthreads/sysdeps/sparc/tls.h | 114 |
4 files changed, 205 insertions, 1 deletions
diff --git a/libpthread/linuxthreads/sysdeps/sparc/pspinlock.c b/libpthread/linuxthreads/sysdeps/sparc/pspinlock.c new file mode 100644 index 000000000..4de152be3 --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/sparc/pspinlock.c @@ -0,0 +1,87 @@ +/* POSIX spinlock implementation. SPARC32 version. + Copyright (C) 2000 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/>. */ + +#include <errno.h> +#include <pthread.h> +#include "internals.h" + +/* This implementation is similar to the one used in the Linux kernel. */ +int +__pthread_spin_lock (pthread_spinlock_t *lock) +{ + __asm__ __volatile__ + ("1: ldstub [%0], %%g2\n" + " orcc %%g2, 0x0, %%g0\n" + " bne,a 2f\n" + " ldub [%0], %%g2\n" + ".subsection 2\n" + "2: orcc %%g2, 0x0, %%g0\n" + " bne,a 2b\n" + " ldub [%0], %%g2\n" + " b,a 1b\n" + ".previous" + : /* no outputs */ + : "r" (lock) + : "g2", "memory", "cc"); + return 0; +} +weak_alias (__pthread_spin_lock, pthread_spin_lock) + + +int +__pthread_spin_trylock (pthread_spinlock_t *lock) +{ + int result; + __asm__ __volatile__ + ("ldstub [%1], %0" + : "=r" (result) + : "r" (lock) + : "memory"); + return result == 0 ? 0 : EBUSY; +} +weak_alias (__pthread_spin_trylock, pthread_spin_trylock) + + +int +__pthread_spin_unlock (pthread_spinlock_t *lock) +{ + *lock = 0; + return 0; +} +weak_alias (__pthread_spin_unlock, pthread_spin_unlock) + + +int +__pthread_spin_init (pthread_spinlock_t *lock, int pshared) +{ + /* We can ignore the `pshared' parameter. Since we are busy-waiting + all processes which can access the memory location `lock' points + to can use the spinlock. */ + *lock = 0; + return 0; +} +weak_alias (__pthread_spin_init, pthread_spin_init) + + +int +__pthread_spin_destroy (pthread_spinlock_t *lock) +{ + /* Nothing to do. */ + return 0; +} +weak_alias (__pthread_spin_destroy, pthread_spin_destroy) diff --git a/libpthread/linuxthreads/sysdeps/sparc/tcb-offsets.h b/libpthread/linuxthreads/sysdeps/sparc/tcb-offsets.h deleted file mode 100644 index 6d6f111f4..000000000 --- a/libpthread/linuxthreads/sysdeps/sparc/tcb-offsets.h +++ /dev/null @@ -1 +0,0 @@ -#include "../../../linuxthreads/sysdeps/pthread/tcb-offsets.h" diff --git a/libpthread/linuxthreads/sysdeps/sparc/tcb-offsets.sym b/libpthread/linuxthreads/sysdeps/sparc/tcb-offsets.sym new file mode 100644 index 000000000..aee6be257 --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/sparc/tcb-offsets.sym @@ -0,0 +1,4 @@ +#include <sysdep.h> +#include <tls.h> + +MULTIPLE_THREADS_OFFSET offsetof (tcbhead_t, multiple_threads) diff --git a/libpthread/linuxthreads/sysdeps/sparc/tls.h b/libpthread/linuxthreads/sysdeps/sparc/tls.h new file mode 100644 index 000000000..1e31c2e63 --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/sparc/tls.h @@ -0,0 +1,114 @@ +/* Definitions for thread-local data handling. linuxthreads/sparc version. + Copyright (C) 2002, 2003, 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/>. */ + +#ifndef _TLS_H +#define _TLS_H + +#ifndef __ASSEMBLER__ + +# include <pt-machine.h> +# include <stdbool.h> +# include <stddef.h> + +/* Type for the dtv. */ +typedef union dtv +{ + size_t counter; + struct + { + void *val; + bool is_static; + } pointer; +} dtv_t; + +typedef struct +{ + void *tcb; /* Pointer to the TCB. Not necessary the + thread descriptor used by libpthread. */ + dtv_t *dtv; + void *self; /* Pointer to the thread descriptor. */ + int multiple_threads; +} tcbhead_t; + +#else /* __ASSEMBLER__ */ +# include <tcb-offsets.h> +#endif /* __ASSEMBLER__ */ + +#ifdef HAVE_TLS_SUPPORT + +/* Signal that TLS support is available. */ +# define USE_TLS 1 + +# ifndef __ASSEMBLER__ +/* Get system call information. */ +# include <sysdep.h> + +/* Get the thread descriptor definition. */ +# include <linuxthreads/descr.h> + +/* This is the size of the initial TCB. */ +# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t) + +/* Alignment requirements for the initial TCB. */ +# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t) + +/* This is the size of the TCB. */ +# define TLS_TCB_SIZE sizeof (struct _pthread_descr_struct) + +/* Alignment requirements for the TCB. */ +# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct) + +/* The TCB can have any size and the memory following the address the + thread pointer points to is unspecified. Allocate the TCB there. */ +# define TLS_TCB_AT_TP 1 + +/* Install the dtv pointer. The pointer passed is to the element with + index -1 which contain the length. */ +# define INSTALL_DTV(descr, dtvp) \ + ((tcbhead_t *) (descr))->dtv = (dtvp) + 1 + +/* Install new dtv for current thread. */ +# define INSTALL_NEW_DTV(DTV) \ + (((tcbhead_t *) __thread_self)->dtv = (DTV)) + +/* Return dtv of given thread descriptor. */ +# define GET_DTV(descr) \ + (((tcbhead_t *) (descr))->dtv) + +/* Code to initially initialize the thread pointer. */ +# define TLS_INIT_TP(descr, secondcall) \ + (__thread_self = (__typeof (__thread_self)) (descr), NULL) + +/* Return the address of the dtv for the current thread. */ +# define THREAD_DTV() \ + (((tcbhead_t *) __thread_self)->dtv) + +# endif + +#else + +# define NONTLS_INIT_TP \ + do { \ + static const tcbhead_t nontls_init_tp \ + = { .multiple_threads = 0 }; \ + __thread_self = (__typeof (__thread_self)) &nontls_init_tp; \ + } while (0) + +#endif /* USE_TLS */ + +#endif /* tls.h */ |