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authorWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:00:19 -0600
committerWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:00:19 -0600
commit6b6ede3d15f04fe825cfa9f697507457e3640344 (patch)
treeefe9bf75eaf2200f89087ed0ef2ef350549ccd6d /libpthread/linuxthreads/sysdeps/sh
parentf972c2262fd4efc2bbf9789dce145bb705acec24 (diff)
resolve merge
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/sh')
-rw-r--r--libpthread/linuxthreads/sysdeps/sh/pspinlock.c79
-rw-r--r--libpthread/linuxthreads/sysdeps/sh/tcb-offsets.sym10
-rw-r--r--libpthread/linuxthreads/sysdeps/sh/tls.h140
3 files changed, 49 insertions, 180 deletions
diff --git a/libpthread/linuxthreads/sysdeps/sh/pspinlock.c b/libpthread/linuxthreads/sysdeps/sh/pspinlock.c
deleted file mode 100644
index 2f039de53..000000000
--- a/libpthread/linuxthreads/sysdeps/sh/pspinlock.c
+++ /dev/null
@@ -1,79 +0,0 @@
-/* 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
deleted file mode 100644
index 6324a016c..000000000
--- a/libpthread/linuxthreads/sysdeps/sh/tcb-offsets.sym
+++ /dev/null
@@ -1,10 +0,0 @@
-#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 512e3181e..25bef830f 100644
--- a/libpthread/linuxthreads/sysdeps/sh/tls.h
+++ b/libpthread/linuxthreads/sysdeps/sh/tls.h
@@ -30,129 +30,87 @@
typedef union dtv
{
size_t counter;
- struct
- {
- void *val;
- bool is_static;
- } pointer;
+ void *pointer;
} dtv_t;
-#else /* __ASSEMBLER__ */
-# include <tcb-offsets.h>
-#endif /* __ASSEMBLER__ */
+
+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;
/* We can support TLS only if the floating-stack support is available. */
-#if defined HAVE_TLS_SUPPORT \
- && (defined FLOATING_STACKS || !defined IS_IN_libpthread)
+#if defined FLOATING_STACKS && defined HAVE_TLS_SUPPORT
-/* Signal that TLS support is available. */
-# define USE_TLS 1
+/* Get system call information. */
+# include <sysdep.h>
-/* 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
+/* Signal that TLS support is available. */
+//# define USE_TLS 1
-# ifndef __ASSEMBLER__
-typedef struct
-{
- dtv_t *dtv;
- void *private;
-} tcbhead_t;
+/* 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)
+# 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 (tcbhead_t)
-
-/* This is the size we need before TCB. */
-# define TLS_PRE_TCB_SIZE sizeof (struct _pthread_descr_struct)
+# define TLS_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(tcbp, dtvp) \
- ((tcbhead_t *) (tcbp))->dtv = dtvp + 1
+# define INSTALL_DTV(descr, dtvp) \
+ ((tcbhead_t *) (descr))->dtv = dtvp + 1
/* Install new dtv for current thread. */
-# define INSTALL_NEW_DTV(dtv) \
- ({ tcbhead_t *__tcbp; \
- __asm__ __volatile__ ("stc gbr,%0" : "=r" (__tcbp)); \
- __tcbp->dtv = (dtv);})
+# define INSTALL_NEW_DTV(dtv) \
+ ({ struct _pthread_descr_struct *__descr; \
+ THREAD_SETMEM (__descr, p_header.data.dtvp, (dtv)); })
/* Return dtv of given thread descriptor. */
-# define GET_DTV(tcbp) \
- (((tcbhead_t *) (tcbp))->dtv)
+# define GET_DTV(descr) \
+ (((tcbhead_t *) (descr))->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(tcbp, secondcall) \
- ({ __asm__ __volatile__ ("ldc %0,gbr" : : "r" (tcbp)); 0; })
-
-/* Return the address of the dtv for the current thread. */
-# define THREAD_DTV() \
- ({ tcbhead_t *__tcbp; \
- __asm__ __volatile__ ("stc gbr,%0" : "=r" (__tcbp)); \
- __tcbp->dtv;})
+# 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; \
+ })
-/* 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__ */
+/* 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); })
-#endif /* HAVE_TLS_SUPPORT && (FLOATING_STACKS || !IS_IN_libpthread) */
+#endif /* FLOATING_STACKS && HAVE_TLS_SUPPORT */
+#endif /* __ASSEMBLER__ */
#endif /* tls.h */