Revert "resolve merge"

This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.

4 files changed, 266 insertions, 63 deletions

diff --git a/libpthread/linuxthreads/sysdeps/arm/pspinlock.c b/libpthread/linuxthreads/sysdeps/arm/pspinlock.c
new file mode 100644
index 000000000..691085270
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/arm/pspinlock.c
@@ -0,0 +1,81 @@
+/* POSIX spinlock implementation.  Arm 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"
+
+
+int
+__pthread_spin_lock (pthread_spinlock_t *lock)
+{
+  unsigned int val;
+
+  do
+    __asm__ __volatile__ ("swp %0, %1, [%2]"
+		  : "=r" (val)
+		  : "0" (1), "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__ ("swp %0, %1, [%2]"
+		: "=r" (val)
+		: "0" (1), "r" (lock)
+		: "memory");
+
+  return val ? EBUSY : 0;
+}
+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/arm/pt-machine.h b/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
index 2b877f980..0a455b97d 100644
--- a/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
+++ b/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
@@ -1,6 +1,6 @@
 /* Machine-dependent pthreads configuration and inline functions.
    ARM version.
-   Copyright (C) 1997, 1998, 2000, 2002 Free Software Foundation, Inc.
+   Copyright (C) 1997, 1998, 2000, 2002, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Philip Blundell <philb@gnu.org>.
 
@@ -21,86 +21,29 @@
 #ifndef _PT_MACHINE_H
 #define _PT_MACHINE_H   1
 
-#include <sys/syscall.h>
-#include <unistd.h>
+#include <features.h>
 
 #ifndef PT_EI
 # define PT_EI __extern_always_inline
 #endif
 
-#if defined(__thumb__)
-#if defined(__USE_LDREXSTREX__)
-PT_EI long int ldrex(int *spinlock)
-{
-	long int ret;
-	__asm__ __volatile__(
-		"ldrex %0, [%1]\n"
-		: "=r"(ret)
-		: "r"(spinlock) : "memory");
-	return ret;
-}
-
-PT_EI long int strex(int val, int *spinlock)
-{
-	long int ret;
-	__asm__ __volatile__(
-		"strex %0, %1, [%2]\n"
-		: "=r"(ret)
-		: "r" (val), "r"(spinlock) : "memory");
-	return ret;
-}
-
-/* Spinlock implementation; required.  */
-PT_EI long int
-testandset (int *spinlock)
-{
-  register unsigned int ret;
-
-  do {
-	  ret = ldrex(spinlock);
-  } while (strex(1, spinlock));
-
-  return ret;
-}
-
-#else /* __USE_LDREXSTREX__ */
-
 /* This will not work on ARM1 or ARM2 because SWP is lacking on those
    machines.  Unfortunately we have no way to detect this at compile
    time; let's hope nobody tries to use one.  */
 
 /* Spinlock implementation; required.  */
-PT_EI long int testandset (int *spinlock);
-PT_EI long int testandset (int *spinlock)
+PT_EI long int
+testandset (int *spinlock)
 {
   register unsigned int ret;
-  void *pc;
-  __asm__ __volatile__(
-	".align 0\n"
-	"\tbx pc\n"
-	"\tnop\n"
-	"\t.arm\n"
-	"\tswp %0, %2, [%3]\n"
-	"\torr %1, pc, #1\n"
-	"\tbx %1\n"
-	"\t.force_thumb"
-	: "=r"(ret), "=r"(pc)
-	: "0"(1), "r"(spinlock));
-  return ret;
-}
-#endif
-#else /* __thumb__ */
 
-PT_EI long int testandset (int *spinlock);
-PT_EI long int testandset (int *spinlock)
-{
-  register unsigned int ret;
   __asm__ __volatile__("swp %0, %1, [%2]"
 		       : "=r"(ret)
 		       : "0"(1), "r"(spinlock));
+
   return ret;
 }
-#endif
+
 
 /* Get some notion of the current stack.  Need not be exactly the top
    of the stack, just something somewhere in the current frame.  */
diff --git a/libpthread/linuxthreads/sysdeps/arm/sysdep-cancel.h b/libpthread/linuxthreads/sysdeps/arm/sysdep-cancel.h
new file mode 100644
index 000000000..ba6a1e04b
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/arm/sysdep-cancel.h
@@ -0,0 +1,8 @@
+#include <sysdep.h>
+
+/* No multi-thread handling enabled.  */
+#define SINGLE_THREAD_P (1)
+#define RTLD_SINGLE_THREAD_P (1)
+#define LIBC_CANCEL_ASYNC()	0 /* Just a dummy value.  */
+#define LIBC_CANCEL_RESET(val)	((void)(val)) /* Nothing, but evaluate it.  */
+#define LIBC_CANCEL_HANDLED()	/* Nothing.  */
diff --git a/libpthread/linuxthreads/sysdeps/arm/tls.h b/libpthread/linuxthreads/sysdeps/arm/tls.h
new file mode 100644
index 000000000..df8d97009
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/arm/tls.h
@@ -0,0 +1,171 @@
+/* Definitions for thread-local data handling.  linuxthreads/ARM version.
+   Copyright (C) 2004 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 <stdbool.h>
+# include <pt-machine.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
+{
+  dtv_t *dtv;
+
+  /* Reserved for the thread implementation.  Unused in LinuxThreads.  */
+  void *private;
+} tcbhead_t;
+#endif
+
+
+/* We can support TLS only if the floating-stack support is available.
+   However, we want to compile in the support and test at runtime whether
+   the running kernel can support it or not.  To avoid bothering with the
+   TLS support code at all, use configure --without-tls.
+
+   We need USE_TLS to be consistently defined, for ldsodefs.h conditionals.
+   But some of the code below can cause problems in building libpthread
+   (e.g. useldt.h will defined FLOATING_STACKS when it shouldn't).  */
+
+/* LinuxThreads can only support TLS if both floating stacks and support
+   from the tools are available.
+
+   We have to define USE_TLS consistently, or ldsodefs.h will lay out types
+   differently between an NPTL build and a LinuxThreads build.  It can be set
+   for libc.so and not libpthread.so, but only if we provide appropriate padding
+   in the _pthread_descr_struct.
+
+   Currently nothing defines FLOATING_STACKS.  We could assume this based on
+   kernel version once the TLS patches are available in kernel.org.
+
+   To avoid bothering with the TLS support code at all, use configure
+   --without-tls.  */
+
+#if defined HAVE_TLS_SUPPORT \
+    && (defined FLOATING_STACKS || !defined IS_IN_libpthread)
+
+/* Signal that TLS support is available.  */
+# 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
+
+# ifndef __ASSEMBLER__
+/* Get system call information.  */
+#  include <sysdep.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 (tcbhead_t)
+
+/* Alignment requirements for the TCB.  */
+#  define TLS_TCB_ALIGN		__alignof__ (tcbhead_t)
+
+/* This is the size we need before TCB.  */
+#  define TLS_PRE_TCB_SIZE	sizeof (struct _pthread_descr_struct)
+
+/* The DTV is allocated at the TP; the TCB is placed elsewhere.  */
+#  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)
+
+/* Install new dtv for current thread.  */
+#  define INSTALL_NEW_DTV(DTV) \
+  (((tcbhead_t *)__builtin_thread_pointer ())->dtv = (DTV))
+
+/* Return dtv of given thread descriptor.  */
+#  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(TCBP, SECONDCALL) \
+  ({ INTERNAL_SYSCALL_DECL (err);					\
+     long result_var;							\
+     result_var = INTERNAL_SYSCALL_ARM (set_tls, err, 1, (TCBP));	\
+     INTERNAL_SYSCALL_ERROR_P (result_var, err)				\
+       ? "unknown error" : NULL; })
+
+/* Return the address of the dtv for the current thread.  */
+#  define THREAD_DTV() \
+  (((tcbhead_t *)__builtin_thread_pointer ())->dtv)
+
+/* Return the thread descriptor for the current thread.  */
+#  undef THREAD_SELF
+#  define THREAD_SELF \
+  ((pthread_descr)__builtin_thread_pointer () - 1)
+
+#  undef INIT_THREAD_SELF
+#  define INIT_THREAD_SELF(DESCR, NR) \
+  TLS_INIT_TP ((struct _pthread_descr_struct *)(DESCR) + 1, 0)
+
+/* Get the thread descriptor definition.  */
+#  include <linuxthreads/descr.h>
+
+/* ??? Generic bits of LinuxThreads may call these macros with
+   DESCR set to NULL.  We are expected to be able to reference
+   the "current" value.
+
+   In our case, we'd really prefer to use DESCR, since lots of
+   PAL_code calls would be expensive.  We can only trust that
+   the compiler does its job and unifies the multiple
+   __builtin_thread_pointer instances.  */
+
+#define THREAD_GETMEM(descr, member) \
+  ((void) sizeof (descr), THREAD_SELF->member)
+#define THREAD_GETMEM_NC(descr, member) \
+  ((void) sizeof (descr), THREAD_SELF->member)
+#define THREAD_SETMEM(descr, member, value) \
+  ((void) sizeof (descr), THREAD_SELF->member = (value))
+#define THREAD_SETMEM_NC(descr, member, value) \
+  ((void) sizeof (descr), THREAD_SELF->member = (value))
+
+/* Initializing the thread pointer will generate a SIGILL if the syscall
+   is not available.  */
+#define TLS_INIT_TP_EXPENSIVE 1
+
+# endif	/* HAVE_TLS_SUPPORT */
+#endif /* __ASSEMBLER__ */
+
+#endif	/* tls.h */