diff options
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/sh')
| -rw-r--r-- | libpthread/linuxthreads/sysdeps/sh/pspinlock.c | 79 | ||||
| -rw-r--r-- | libpthread/linuxthreads/sysdeps/sh/tcb-offsets.sym | 10 | ||||
| -rw-r--r-- | libpthread/linuxthreads/sysdeps/sh/tls.h | 140 |
3 files changed, 180 insertions, 49 deletions
diff --git a/libpthread/linuxthreads/sysdeps/sh/pspinlock.c b/libpthread/linuxthreads/sysdeps/sh/pspinlock.c new file mode 100644 index 000000000..2f039de53 --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/sh/pspinlock.c @@ -0,0 +1,79 @@ +/* POSIX spinlock implementation. SH version. + Copyright (C) 2000, 2001 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" + +int +__pthread_spin_lock (pthread_spinlock_t *lock) +{ + unsigned int val; + + do + __asm__ __volatile__ ("tas.b @%1; movt %0" + : "=r" (val) + : "r" (lock) + : "memory"); + while (val == 0); + + return 0; +} +weak_alias (__pthread_spin_lock, pthread_spin_lock) + + +int +__pthread_spin_trylock (pthread_spinlock_t *lock) +{ + unsigned int val; + + __asm__ __volatile__ ("tas.b @%1; movt %0" + : "=r" (val) + : "r" (lock) + : "memory"); + return val ? 0 : EBUSY; +} +weak_alias (__pthread_spin_trylock, pthread_spin_trylock) + + +int +__pthread_spin_unlock (pthread_spinlock_t *lock) +{ + return *lock = 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. */ + return *lock = 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/sh/tcb-offsets.sym b/libpthread/linuxthreads/sysdeps/sh/tcb-offsets.sym new file mode 100644 index 000000000..6324a016c --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/sh/tcb-offsets.sym @@ -0,0 +1,10 @@ +#include <sysdep.h> +#include <tls.h> + +-- +#ifdef __UCLIBC_HAS_TLS__ +MULTIPLE_THREADS_OFFSET offsetof (struct _pthread_descr_struct, p_multiple_threads) +TLS_PRE_TCB_SIZE sizeof (struct _pthread_descr_struct) +#else +MULTIPLE_THREADS_OFFSET offsetof (tcbhead_t, multiple_threads) +#endif diff --git a/libpthread/linuxthreads/sysdeps/sh/tls.h b/libpthread/linuxthreads/sysdeps/sh/tls.h index 25bef830f..512e3181e 100644 --- a/libpthread/linuxthreads/sysdeps/sh/tls.h +++ b/libpthread/linuxthreads/sysdeps/sh/tls.h @@ -30,87 +30,129 @@ typedef union dtv { size_t counter; - void *pointer; + 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. */ -} tcbhead_t; +#else /* __ASSEMBLER__ */ +# include <tcb-offsets.h> +#endif /* __ASSEMBLER__ */ /* We can support TLS only if the floating-stack support is available. */ -#if defined FLOATING_STACKS && defined HAVE_TLS_SUPPORT - -/* Get system call information. */ -# include <sysdep.h> +#if defined HAVE_TLS_SUPPORT \ + && (defined FLOATING_STACKS || !defined IS_IN_libpthread) /* Signal that TLS support is available. */ -//# define USE_TLS 1 +# define USE_TLS 1 +/* Include padding in _pthread_descr_struct so that libc can find p_errno, + if libpthread will only include the padding because of the !IS_IN_libpthread + check. */ +#ifndef FLOATING_STACKS +# define INCLUDE_TLS_PADDING 1 +#endif -/* Get the thread descriptor definition. */ -# include <linuxthreads/descr.h> +# ifndef __ASSEMBLER__ + +typedef struct +{ + dtv_t *dtv; + void *private; +} tcbhead_t; /* This is the size of the initial TCB. */ -# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t) +# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t) /* Alignment requirements for the initial TCB. */ -# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t) +# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t) /* This is the size of the TCB. */ -# define TLS_TCB_SIZE sizeof (struct _pthread_descr_struct) +# define TLS_TCB_SIZE sizeof (tcbhead_t) + +/* This is the size we need before TCB. */ +# define TLS_PRE_TCB_SIZE sizeof (struct _pthread_descr_struct) /* Alignment requirements for the TCB. */ -# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct) +# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct) /* The TLS blocks start right after the TCB. */ -# define TLS_DTV_AT_TP 1 - +# define TLS_DTV_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 +# define INSTALL_DTV(tcbp, dtvp) \ + ((tcbhead_t *) (tcbp))->dtv = dtvp + 1 /* Install new dtv for current thread. */ -# define INSTALL_NEW_DTV(dtv) \ - ({ struct _pthread_descr_struct *__descr; \ - THREAD_SETMEM (__descr, p_header.data.dtvp, (dtv)); }) +# define INSTALL_NEW_DTV(dtv) \ + ({ tcbhead_t *__tcbp; \ + __asm__ __volatile__ ("stc gbr,%0" : "=r" (__tcbp)); \ + __tcbp->dtv = (dtv);}) /* Return dtv of given thread descriptor. */ -# define GET_DTV(descr) \ - (((tcbhead_t *) (descr))->dtv) +# define GET_DTV(tcbp) \ + (((tcbhead_t *) (tcbp))->dtv) /* Code to initially initialize the thread pointer. This might need special attention since 'errno' is not yet available and if the operation can cause a failure 'errno' must not be touched. */ -# define TLS_INIT_TP(descr, secondcall) \ - ({ \ - void *_descr = (descr); \ - int result; \ - tcbhead_t *head = _descr; \ - \ - head->tcb = _descr; \ - /* For now the thread descriptor is at the same address. */ \ - head->self = _descr; \ - \ - __asm__ ("ldc %0,gbr" : : "r" (_descr)); \ - \ - 0; \ - }) - +# define TLS_INIT_TP(tcbp, secondcall) \ + ({ __asm__ __volatile__ ("ldc %0,gbr" : : "r" (tcbp)); 0; }) /* Return the address of the dtv for the current thread. */ -# define THREAD_DTV() \ - ({ struct _pthread_descr_struct *__descr; \ - THREAD_GETMEM (__descr, p_header.data.dtvp); }) +# define THREAD_DTV() \ + ({ tcbhead_t *__tcbp; \ + __asm__ __volatile__ ("stc gbr,%0" : "=r" (__tcbp)); \ + __tcbp->dtv;}) -#endif /* FLOATING_STACKS && HAVE_TLS_SUPPORT */ -#endif /* __ASSEMBLER__ */ +/* Return the thread descriptor for the current thread. */ +# undef THREAD_SELF +# define THREAD_SELF \ + ({ struct _pthread_descr_struct *__self; \ + __asm__ ("stc gbr,%0" : "=r" (__self)); \ + __self - 1;}) + +# undef INIT_THREAD_SELF +# define INIT_THREAD_SELF(descr, nr) \ + ({ struct _pthread_descr_struct *__self = (void *) descr; \ + __asm__ __volatile__ ("ldc %0,gbr" : : "r" (__self + 1)); \ + 0; }) + +# define TLS_MULTIPLE_THREADS_IN_TCB 1 + +/* Get the thread descriptor definition. This must be after the + the definition of THREAD_SELF for TLS. */ +# include <linuxthreads/descr.h> + +# endif /* __ASSEMBLER__ */ + +#else + +# ifndef __ASSEMBLER__ + +typedef struct +{ + void *tcb; + dtv_t *dtv; + void *self; + int multiple_threads; +} tcbhead_t; + +/* Get the thread descriptor definition. */ +# include <linuxthreads/descr.h> + +# define NONTLS_INIT_TP \ + do { \ + static const tcbhead_t nontls_init_tp = { .multiple_threads = 0 }; \ + __asm__ __volatile__ ("ldc %0,gbr" : : "r" (&nontls_init_tp)); \ + } while (0) + +# endif /* __ASSEMBLER__ */ + +#endif /* HAVE_TLS_SUPPORT && (FLOATING_STACKS || !IS_IN_libpthread) */ #endif /* tls.h */ |