remove linuxthreads.new, rename linuxthreads.old

Linuxthreads.new isn't really useful with the existence
of NPTL/TLS for well supported architectures. There is no
reason to use LT.new for ARM/MIPS or other architectures
supporting NPTL/TLS. It is not available for noMMU architectures
like Blackfin or FR-V. To simplify the live of the few uClibc-ng
developers, LT.new is removed and LT.old is renamed to LT.
LINUXTHREADS_OLD -> UCLIBC_HAS_LINUXTHREADS

3 files changed, 29 insertions, 276 deletions

diff --git a/libpthread/linuxthreads/sysdeps/mips/pspinlock.c b/libpthread/linuxthreads/sysdeps/mips/pspinlock.c
deleted file mode 100644
index 7b9205ef0..000000000
--- a/libpthread/linuxthreads/sysdeps/mips/pspinlock.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/* 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 74e8807eb..caaf9a7c0 100644
--- a/libpthread/linuxthreads/sysdeps/mips/pt-machine.h
+++ b/libpthread/linuxthreads/sysdeps/mips/pt-machine.h
@@ -24,13 +24,40 @@
 #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
@@ -58,22 +85,12 @@ __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
deleted file mode 100644
index 4e7887a74..000000000
--- a/libpthread/linuxthreads/sysdeps/mips/tls.h
+++ /dev/null
@@ -1,169 +0,0 @@
-/* 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 */