Revert "resolve merge"

This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.

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 */