Revert "resolve merge"

This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.

3 files changed, 276 insertions, 29 deletions

diff --git a/libpthread/linuxthreads/sysdeps/mips/pspinlock.c b/libpthread/linuxthreads/sysdeps/mips/pspinlock.c
new file mode 100644
index 000000000..7b9205ef0
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/mips/pspinlock.c
@@ -0,0 +1,95 @@
+/* POSIX spinlock implementation.  MIPS version.
+   Copyright (C) 2000, 2002, 2003, 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; see the file COPYING.LIB.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <sgidefs.h>
+#include <sys/tas.h>
+#include "internals.h"
+
+/* This implementation is similar to the one used in the Linux kernel.  */
+int
+__pthread_spin_lock (pthread_spinlock_t *lock)
+{
+  unsigned int tmp1, tmp2;
+
+  __asm__ __volatile__
+    ("\t\t\t# spin_lock\n"
+     "1:\n\t"
+     ".set	push\n\t"
+#if _MIPS_SIM == _ABIO32
+     ".set	mips2\n\t"
+#endif
+     "ll	%1,%3\n\t"
+     "li	%2,1\n\t"
+     "bnez	%1,1b\n\t"
+     "sc	%2,%0\n\t"
+     ".set	pop\n\t"
+     "beqz	%2,1b"
+     : "=m" (*lock), "=&r" (tmp1), "=&r" (tmp2)
+     : "m" (*lock)
+     : "memory");
+
+  return 0;
+}
+
+weak_alias (__pthread_spin_lock, pthread_spin_lock)
+
+
+int
+__pthread_spin_trylock (pthread_spinlock_t *lock)
+{
+  /* To be done.  */
+  return 0;
+}
+weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
+
+
+int
+__pthread_spin_unlock (pthread_spinlock_t *lock)
+{
+  __asm__ __volatile__
+    ("\t\t\t# spin_unlock\n\t"
+     "sw	$0,%0"
+     : "=m" (*lock)
+     :
+     : "memory");
+  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/mips/pt-machine.h b/libpthread/linuxthreads/sysdeps/mips/pt-machine.h
index caaf9a7c0..74e8807eb 100644
--- a/libpthread/linuxthreads/sysdeps/mips/pt-machine.h
+++ b/libpthread/linuxthreads/sysdeps/mips/pt-machine.h
@@ -24,40 +24,13 @@
 #define _PT_MACHINE_H   1
 
 #include <features.h>
+#include <sgidefs.h>
+#include <sys/tas.h>
 
 #ifndef PT_EI
 # define PT_EI __extern_always_inline
 #endif
 
-/* Copyright (C) 2000, 2002 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Maciej W. Rozycki <macro@ds2.pg.gda.pl>, 2000.  */
-static __inline__ int
-__NTH (_test_and_set (int *p, int v))
-{
-  int r, t;
-
-  __asm__ __volatile__
-    ("/* Inline test and set */\n"
-     "1:\n\t"
-     ".set	push\n\t"
-     ".set	mips2\n\t"
-     "ll	%0,%3\n\t"
-     "move	%1,%4\n\t"
-     "beq	%0,%4,2f\n\t"
-     "sc	%1,%2\n\t"
-     ".set	pop\n\t"
-     "beqz	%1,1b\n"
-     "2:\n\t"
-     "/* End test and set */"
-     : "=&r" (r), "=&r" (t), "=m" (*p)
-     : "m" (*p), "r" (v)
-     : "memory");
-
-  return r;
-}
-
-
 /* Spinlock implementation; required.  */
 
 PT_EI long int
@@ -85,12 +58,22 @@ __compare_and_swap (long int *p, long int oldval, long int newval)
     ("/* Inline compare & swap */\n"
      "1:\n\t"
      ".set	push\n\t"
+#if _MIPS_SIM == _ABIO32
      ".set	mips2\n\t"
+#endif
+#if _MIPS_SIM == _ABI64
+     "lld	%1,%5\n\t"
+#else
      "ll	%1,%5\n\t"
+#endif
      "move	%0,$0\n\t"
      "bne	%1,%3,2f\n\t"
      "move	%0,%4\n\t"
+#if _MIPS_SIM == _ABI64
+     "scd	%0,%2\n\t"
+#else
      "sc	%0,%2\n\t"
+#endif
      ".set	pop\n\t"
      "beqz	%0,1b\n"
      "2:\n\t"
diff --git a/libpthread/linuxthreads/sysdeps/mips/tls.h b/libpthread/linuxthreads/sysdeps/mips/tls.h
new file mode 100644
index 000000000..4e7887a74
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/mips/tls.h
@@ -0,0 +1,169 @@
+/* Definitions for thread-local data handling.  linuxthreads/MIPS version.
+   Copyright (C) 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 <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;
+
+# define READ_THREAD_POINTER() \
+    ({ void *__result;							      \
+       __asm__ __volatile__ (".set\tpush\n\t.set\tmips32r2\n\t"			      \
+		     "rdhwr\t%0, $29\n\t.set\tpop" : "=v" (__result));	      \
+       __result; })
+
+#else /* __ASSEMBLER__ */
+# include <tcb-offsets.h>
+
+/* Note: rd must be $v1 to be ABI-conformant.  */
+# define READ_THREAD_POINTER(rd) \
+	.set	push;							      \
+	.set	mips32r2;						      \
+	rdhwr	rd, $29;						      \
+	.set	pop
+#endif /* __ASSEMBLER__ */
+
+/* LinuxThreads can only use TLS if both floating stacks (in the MIPS case,
+   that means support for "rdhwr") 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, but
+   it hardly seems worth it.  Use NPTL if you can.
+
+   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__
+
+/* This layout is actually wholly private and not affected by the ABI.
+   Nor does it overlap the pthread data structure, so we need nothing
+   extra here at all.  */
+typedef struct
+{
+  dtv_t *dtv;
+  void *private;
+} tcbhead_t;
+
+/* This is the size of the initial TCB.  */
+#  define TLS_INIT_TCB_SIZE	0
+
+/* Alignment requirements for the initial TCB.  */
+#  define TLS_INIT_TCB_ALIGN	__alignof__ (struct _pthread_descr_struct)
+
+/* This is the size of the TCB.  */
+#  define TLS_TCB_SIZE		0
+
+/* Alignment requirements for the TCB.  */
+#  define TLS_TCB_ALIGN		__alignof__ (struct _pthread_descr_struct)
+
+/* This is the size we need before TCB.  */
+#  define TLS_PRE_TCB_SIZE \
+  (sizeof (struct _pthread_descr_struct)				      \
+   + ((sizeof (tcbhead_t) + TLS_TCB_ALIGN - 1) & ~(TLS_TCB_ALIGN - 1)))
+
+/* The thread pointer (in hardware register $29) points to the end of
+   the TCB + 0x7000, as for PowerPC.  The pthread_descr structure is
+   immediately in front of the TCB.  */
+#define TLS_TCB_OFFSET		0x7000
+
+/* The DTV is allocated at the TP; the TCB is placed elsewhere.  */
+/* This is not really true for powerpc64.  We are following alpha
+   where the DTV pointer is first doubleword in the TCB.  */
+#  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))[-1].dtv = (DTVP) + 1)
+
+/* Install new dtv for current thread.  */
+#  define INSTALL_NEW_DTV(DTV) (THREAD_DTV() = (DTV))
+
+/* Return dtv of given thread descriptor.  */
+#  define GET_DTV(TCBP)	(((tcbhead_t *) (TCBP))[-1].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 (set_thread_area, err, 1,		\
+				    (char *) (tcbp) + TLS_TCB_OFFSET);	\
+     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 *) (READ_THREAD_POINTER () - TLS_TCB_OFFSET))[-1].dtv)
+
+/* Return the thread descriptor for the current thread.  */
+#  undef THREAD_SELF
+#  define THREAD_SELF \
+    ((pthread_descr) (READ_THREAD_POINTER () \
+		      - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE))
+
+/* Get the thread descriptor definition.  */
+#  include <linuxthreads/descr.h>
+
+/* l_tls_offset == 0 is perfectly valid on MIPS, so we have to use some
+   different value to mean unset l_tls_offset.  */
+#  define NO_TLS_OFFSET	-1
+
+/* Initializing the thread pointer requires a syscall which may not be
+   available, so don't do it if we don't need to.  */
+#  define TLS_INIT_TP_EXPENSIVE 1
+
+# endif /* __ASSEMBLER__ */
+
+#endif /* HAVE_TLS_SUPPORT */
+
+#endif	/* tls.h */