nds32: add NPTL/TLS, *context function, libm changes and code cleanup

This commit includes following features.
1. Support NPTL/TLS
2. Add libm function which is used to handle FP rounding and excpetions
   (ex: fclrexcpt,fedisblxcpti,feenablxcpt... )
3. Add *context function for operating user context
   (ex: setcontext,getcontext,makecontext... )
4. Change the return flow from signal handler
5. Cleanup of old code

The testsuite only has 2 errors, tst-cpuclock1 and tst-cputimer1,
which are related to timing accuracy. (math and locale tests are disabled)

Signed-off-by: Vincent Ren-Wei Chen <vincentc@andestech.com>

21 files changed, 1451 insertions, 0 deletions

diff --git a/libpthread/nptl/sysdeps/nds32/Makefile.arch b/libpthread/nptl/sysdeps/nds32/Makefile.arch
new file mode 100644
index 000000000..7eb852af1
--- /dev/null
+++ b/libpthread/nptl/sysdeps/nds32/Makefile.arch
@@ -0,0 +1,16 @@
+# Makefile for uClibc-ng NPTL
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+
+ASFLAGS-dl-tlsdesc.S = -DNOT_IN_libc=1
+libc_arch_a_SSRC = libc-dl-tlsdesc.S
+
+CFLAGS-gen_tlsdesc.c = -S
+$(libpthread_arch_OUT)/gen_tlsdesc.c: $(libpthread_arch_DIR)/tlsdesc.sym | $(libpthread_arch_OUT)
+	$(do_awk) $(top_srcdir)extra/scripts/gen-as-const.awk $< > $@
+$(libpthread_arch_OUT)/gen_tlsdesc.s: $(libpthread_arch_OUT)/gen_tlsdesc.c | headers
+	$(compile.c)
+libpthread-generated-y += $(libpthread_arch_OUT)/gen_tlsdesc.s
+$(libpthread_arch_OUT)/tlsdesc.h: $(libpthread_arch_OUT)/gen_tlsdesc.s
+	$(do_sed) $(PTHREAD_GENERATE_MANGLE) $< > $@
+	@if test ! -s $@ ; then rm -f $@ ; false ; fi
+pregen-headers-$(UCLIBC_HAS_THREADS_NATIVE) += $(libpthread_arch_OUT)/tlsdesc.h
diff --git a/libpthread/nptl/sysdeps/nds32/dl-tls.h b/libpthread/nptl/sysdeps/nds32/dl-tls.h
new file mode 100644
index 000000000..3b11e7f42
--- /dev/null
+++ b/libpthread/nptl/sysdeps/nds32/dl-tls.h
@@ -0,0 +1,59 @@
+/* Thread-local storage handling in the ELF dynamic linker.  NDS32 version.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+
+   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 _NDS32_DL_TLS_H
+#define _NDS32_DL_TLS_H 1
+
+
+/* Type used to represent a TLS descriptor.  */
+struct tlsdesc
+{
+  ptrdiff_t (*entry)(struct tlsdesc *);
+  union
+    {
+      void *pointer;
+      long value;
+    } argument;
+};
+
+/* Type used for the representation of TLS information in the GOT.  */
+typedef struct
+{
+  unsigned long int ti_module;
+  unsigned long int ti_offset;
+} tls_index;
+
+
+/* Type used as the argument in a TLS descriptor for a symbol that
+ *    needs dynamic TLS offsets.  */
+struct tlsdesc_dynamic_arg
+{
+  tls_index tlsinfo;
+  size_t gen_count;
+};
+
+
+extern void *__tls_get_addr (tls_index *ti);
+
+extern ptrdiff_t attribute_hidden
+  _dl_tlsdesc_return(struct tlsdesc_dynamic_arg *);
+
+extern void *_dl_make_tlsdesc_dynamic (struct link_map *map, size_t ti_offset);
+extern ptrdiff_t attribute_hidden
+  _dl_tlsdesc_dynamic(struct tlsdesc *);
+
+#endif //_NDS32_DL_TLS_H
diff --git a/libpthread/nptl/sysdeps/nds32/libc-dl-tlsdesc.S b/libpthread/nptl/sysdeps/nds32/libc-dl-tlsdesc.S
new file mode 100644
index 000000000..5892a8b28
--- /dev/null
+++ b/libpthread/nptl/sysdeps/nds32/libc-dl-tlsdesc.S
@@ -0,0 +1 @@
+#include <ldso/ldso/nds32/dl-tlsdesc.S>
diff --git a/libpthread/nptl/sysdeps/nds32/pthread_spin_lock.c b/libpthread/nptl/sysdeps/nds32/pthread_spin_lock.c
new file mode 100644
index 000000000..cec3acbc6
--- /dev/null
+++ b/libpthread/nptl/sysdeps/nds32/pthread_spin_lock.c
@@ -0,0 +1,65 @@
+/* pthread_spin_lock -- lock a spin lock.  Generic version.
+   Copyright (C) 2012-2016 Free Software Foundation, Inc.
+
+   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/>.  */
+
+#include <atomic.h>
+#include "pthreadP.h"
+
+/* A machine-specific version can define SPIN_LOCK_READS_BETWEEN_CMPXCHG
+  to the number of plain reads that it's optimal to spin on between uses
+  of atomic_compare_and_exchange_val_acq.  If spinning forever is optimal
+  then use -1.  If no plain reads here would ever be optimal, use 0.  */
+#define SPIN_LOCK_READS_BETWEEN_CMPXCHG 1000
+
+int
+pthread_spin_lock (pthread_spinlock_t *lock)
+{
+  /* atomic_exchange usually takes less instructions than
+     atomic_compare_and_exchange.  On the other hand,
+     atomic_compare_and_exchange potentially generates less bus traffic
+     when the lock is locked.
+     We assume that the first try mostly will be successful, and we use
+     atomic_exchange.  For the subsequent tries we use
+     atomic_compare_and_exchange.  */
+  if (atomic_exchange_acq (lock, 1) == 0)
+    return 0;
+
+  do
+    {
+      /* The lock is contended and we need to wait.  Going straight back
+	 to cmpxchg is not a good idea on many targets as that will force
+	 expensive memory synchronizations among processors and penalize other
+	 running threads.
+	 On the other hand, we do want to update memory state on the local core
+	 once in a while to avoid spinning indefinitely until some event that
+	 will happen to update local memory as a side-effect.  */
+      if (SPIN_LOCK_READS_BETWEEN_CMPXCHG >= 0)
+	{
+	  int wait = SPIN_LOCK_READS_BETWEEN_CMPXCHG;
+
+	  while (*lock != 0 && wait > 0)
+	    --wait;
+	}
+      else
+	{
+	  while (*lock != 0)
+	    ;
+	}
+    }
+  while (atomic_compare_and_exchange_val_acq (lock, 1, 0) != 0);
+
+  return 0;
+}
diff --git a/libpthread/nptl/sysdeps/nds32/pthread_spin_trylock.c b/libpthread/nptl/sysdeps/nds32/pthread_spin_trylock.c
new file mode 100644
index 000000000..4e9aa64d3
--- /dev/null
+++ b/libpthread/nptl/sysdeps/nds32/pthread_spin_trylock.c
@@ -0,0 +1,26 @@
+/* pthread_spin_trylock -- trylock a spin lock.  Generic version.
+   Copyright (C) 2012-2016 Free Software Foundation, Inc.
+
+   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/>.  */
+
+#include <errno.h>
+#include <atomic.h>
+#include "pthreadP.h"
+
+int
+pthread_spin_trylock (pthread_spinlock_t *lock)
+{
+  return atomic_exchange_acq (lock, 1) ? EBUSY : 0;
+}
diff --git a/libpthread/nptl/sysdeps/nds32/pthreaddef.h b/libpthread/nptl/sysdeps/nds32/pthreaddef.h
new file mode 100644
index 000000000..c9d3f7781
--- /dev/null
+++ b/libpthread/nptl/sysdeps/nds32/pthreaddef.h
@@ -0,0 +1,39 @@
+/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+
+   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/>.  */
+
+/* Default stack size.  */
+#define ARCH_STACK_DEFAULT_SIZE	(2 * 1024 * 1024)
+
+/* Required stack pointer alignment at beginning.  SSE requires 16
+   bytes.  */
+#define STACK_ALIGN		16
+
+/* Minimal stack size after allocating thread descriptor and guard size.  */
+#define MINIMAL_REST_STACK	2048
+
+/* Alignment requirement for TCB.  */
+#define TCB_ALIGNMENT		16
+
+
+/* Location of current stack frame.  */
+#define CURRENT_STACK_FRAME	__builtin_frame_address (0)
+
+
+/* XXX Until we have a better place keep the definitions here.  */
+#define __exit_thread_inline(val) \
+  INLINE_SYSCALL (exit, 1, (val))
+
+
diff --git a/libpthread/nptl/sysdeps/nds32/tcb-offsets.sym b/libpthread/nptl/sysdeps/nds32/tcb-offsets.sym
new file mode 100644
index 000000000..3b9e10186
--- /dev/null
+++ b/libpthread/nptl/sysdeps/nds32/tcb-offsets.sym
@@ -0,0 +1,12 @@
+#include <sysdep.h>
+#include <tls.h>
+
+--
+
+-- Derive offsets relative to the thread register.
+#define thread_offsetof(mem)    (long)(offsetof(struct pthread, mem) - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
+
+MULTIPLE_THREADS_OFFSET         thread_offsetof (header.multiple_threads)
+PID_OFFSET                      thread_offsetof (pid)
+TID_OFFSET                      thread_offsetof (tid)
+
diff --git a/libpthread/nptl/sysdeps/nds32/tls.h b/libpthread/nptl/sysdeps/nds32/tls.h
new file mode 100644
index 000000000..e2a38626d
--- /dev/null
+++ b/libpthread/nptl/sysdeps/nds32/tls.h
@@ -0,0 +1,178 @@
+/* Definition for thread-local data handling.  NPTL/NDS32 version.
+   Copyright (C) 2005, 2007 Free Software Foundation, Inc.
+
+   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	1
+
+
+#ifndef __ASSEMBLER__
+# include <stdbool.h>
+# include <stddef.h>
+# include <stdint.h>
+
+/* Type for the dtv.  */
+typedef union dtv
+{
+  size_t counter;
+  struct
+  {
+    void *val;
+    bool is_static;
+  } pointer;
+} dtv_t;
+
+#else /* __ASSEMBLER__ */
+# include <tcb-offsets.h>
+#endif /* __ASSEMBLER__ */
+
+
+/* We require TLS support in the tools.  */
+#define HAVE_TLS_SUPPORT                1
+#define HAVE_TLS_MODEL_ATTRIBUTE        1
+#define HAVE___THREAD                   1
+
+/* Signal that TLS support is available.  */
+#define USE_TLS	1
+
+#ifndef __ASSEMBLER__
+
+/* Get system call information.  */
+# include <sysdep.h>
+
+/* The TP points to the start of the thread blocks.  */
+# define TLS_DTV_AT_TP	1
+
+/* We use the multiple_threads field in the pthread struct */
+#define TLS_MULTIPLE_THREADS_IN_TCB	1
+
+/* Get the thread descriptor definition.  */
+# include <../../descr.h>
+
+/* The stack_guard is accessed directly by GCC -fstack-protector code,
+   so it is a part of public ABI.  The dtv and pointer_guard fields
+   are private.  */
+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)
+
+/* This is the size of the TCB.  */
+# define TLS_TCB_SIZE           0
+
+/* Alignment requirements for the TCB.  */
+# define TLS_TCB_ALIGN          __alignof__ (struct pthread)
+
+
+
+/* This is the size we need before TCB - actually, it includes the TCB.  */
+# define TLS_PRE_TCB_SIZE \
+  (sizeof (struct pthread)						      \
+   + ((sizeof (tcbhead_t) + TLS_TCB_ALIGN - 1) & ~(TLS_TCB_ALIGN - 1)))
+
+/* Return the thread descriptor (tp) for the current thread.  */
+register void *__thread_pointer __asm__ ("$r25");
+
+
+/* The thread pointer (in hardware register tp) points to the end of
+   the TCB.  The pthread_descr structure is immediately in front of the TCB.  */
+#ifndef TLS_TCB_OFFSET
+# define TLS_TCB_OFFSET	0
+#endif
+
+/* 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 (tp).  */
+# define TLS_INIT_TP(tcbp, secondcall) \
+    (__thread_pointer = (char *)(tcbp) + TLS_TCB_OFFSET, NULL)
+
+/* Return the address of the dtv for the current thread.  */
+# define THREAD_DTV() \
+    (((tcbhead_t *) (__thread_pointer - TLS_TCB_OFFSET))[-1].dtv)
+
+/* Return the thread descriptor for the current thread.  */
+# define THREAD_SELF \
+    ((struct pthread *) (__thread_pointer \
+			 - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE))
+
+/* Magic for libthread_db to know how to do THREAD_SELF.  */
+# define DB_THREAD_SELF \
+  REGISTER (32, 32, 152, - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
+
+/* Read member of the thread descriptor directly.  */
+# define THREAD_GETMEM(descr, member) (descr->member)
+
+/* Same as THREAD_GETMEM, but the member offset can be non-constant.  */
+# define THREAD_GETMEM_NC(descr, member, idx) \
+    (descr->member[idx])
+
+/* Set member of the thread descriptor directly.  */
+# define THREAD_SETMEM(descr, member, value) \
+    (descr->member = (value))
+
+/* Same as THREAD_SETMEM, but the member offset can be non-constant.  */
+# define THREAD_SETMEM_NC(descr, member, idx, value) \
+    (descr->member[idx] = (value))
+
+
+/* l_tls_offset == 0 is perfectly valid on Tile, so we have to use some
+   different value to mean unset l_tls_offset.  */
+# define NO_TLS_OFFSET		-1
+
+/* Get and set the global scope generation counter in struct pthread.  */
+#define THREAD_GSCOPE_FLAG_UNUSED 0
+#define THREAD_GSCOPE_FLAG_USED   1
+#define THREAD_GSCOPE_FLAG_WAIT   2
+#define THREAD_GSCOPE_RESET_FLAG() \
+  do									     \
+    { int __res								     \
+	= atomic_exchange_rel (&THREAD_SELF->header.gscope_flag,	     \
+			       THREAD_GSCOPE_FLAG_UNUSED);		     \
+      if (__res == THREAD_GSCOPE_FLAG_WAIT)				     \
+	lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE);   \
+    }									     \
+  while (0)
+#define THREAD_GSCOPE_SET_FLAG() \
+  do									     \
+    {									     \
+      THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED;	     \
+      atomic_write_barrier ();						     \
+    }									     \
+  while (0)
+#define THREAD_GSCOPE_WAIT() \
+  GL(dl_wait_lookup_done) ()
+
+#endif /* __ASSEMBLER__ */
+
+#endif /* tls.h */
+
+
diff --git a/libpthread/nptl/sysdeps/nds32/tlsdesc.sym b/libpthread/nptl/sysdeps/nds32/tlsdesc.sym
new file mode 100644
index 000000000..4fa3adacf
--- /dev/null
+++ b/libpthread/nptl/sysdeps/nds32/tlsdesc.sym
@@ -0,0 +1,17 @@
+#include <stddef.h>
+#include <sysdep.h>
+#include <tls.h>
+#include <link.h>
+#include <dl-tls.h>
+
+--
+
+-- Abuse tls.h macros to derive offsets relative to the thread register.
+#define dtv_offsetof(dtv) (long)(offsetof(tcbhead_t, dtv) - sizeof (tcbhead_t))
+DTV_OFFSET                      dtv_offsetof(dtv)
+
+TLSDESC_ARG			offsetof(struct tlsdesc, argument.pointer)
+
+TLSDESC_GEN_COUNT		offsetof(struct tlsdesc_dynamic_arg, gen_count)
+TLSDESC_MODID			offsetof(struct tlsdesc_dynamic_arg, tlsinfo.ti_module)
+TLSDESC_MODOFF			offsetof(struct tlsdesc_dynamic_arg, tlsinfo.ti_offset)
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/Makefile b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/Makefile
new file mode 100644
index 000000000..2caba11b7
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/Makefile
@@ -0,0 +1,9 @@
+# Makefile for uClibc-ng NPTL
+# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+top_srcdir=../../../../../../../
+top_builddir=../../../../../../../
+all: objs
+include $(top_builddir)Rules.mak
+include Makefile.arch
+include $(top_srcdir)Makerules
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/Makefile.arch b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/Makefile.arch
new file mode 100644
index 000000000..3b8935ce5
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/Makefile.arch
@@ -0,0 +1,12 @@
+# Makefile for uClibc-ng NPTL
+# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+libpthread_linux_arch_SSRC =
+libpthread_linux_arch_CSRC = pthread_once.c
+
+libc_linux_arch_CSRC = fork.c
+libc_linux_arch_SSRC = clone.S vfork.S
+libc_linux_arch_SSRC-OMIT = waitpid.S
+
+CFLAGS += $(SSP_ALL_CFLAGS)
+
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/bits/pthreadtypes.h b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/bits/pthreadtypes.h
new file mode 100644
index 000000000..695a61fdd
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/bits/pthreadtypes.h
@@ -0,0 +1,177 @@
+/* Copyright (C) 2002,2003,2004,2005,2006,2007 Free Software Foundation, Inc.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _BITS_PTHREADTYPES_H
+#define _BITS_PTHREADTYPES_H	1
+
+#define __SIZEOF_PTHREAD_ATTR_T 36
+#define __SIZEOF_PTHREAD_MUTEX_T 24
+#define __SIZEOF_PTHREAD_MUTEXATTR_T 4
+#define __SIZEOF_PTHREAD_COND_T 48
+#define __SIZEOF_PTHREAD_COND_COMPAT_T 12
+#define __SIZEOF_PTHREAD_CONDATTR_T 4
+#define __SIZEOF_PTHREAD_RWLOCK_T 32
+#define __SIZEOF_PTHREAD_RWLOCKATTR_T 8
+#define __SIZEOF_PTHREAD_BARRIER_T 20
+#define __SIZEOF_PTHREAD_BARRIERATTR_T 4
+
+
+/* Thread identifiers.  The structure of the attribute type is not
+   exposed on purpose.  */
+typedef unsigned long int pthread_t;
+
+union pthread_attr_t
+{
+  char __size[__SIZEOF_PTHREAD_ATTR_T];
+  long int __align;
+};
+#ifndef __have_pthread_attr_t
+typedef union pthread_attr_t pthread_attr_t;
+# define __have_pthread_attr_t  1
+#endif
+
+
+typedef struct __pthread_internal_slist
+{
+  struct __pthread_internal_slist *__next;
+} __pthread_slist_t;
+
+
+/* Data structures for mutex handling.  The structure of the attribute
+   type is not exposed on purpose.  */
+typedef union
+{
+  struct __pthread_mutex_s
+  {
+    int __lock;
+    unsigned int __count;
+    int __owner;
+    /* KIND must stay at this position in the structure to maintain
+       binary compatibility.  */
+    int __kind;
+    unsigned int __nusers;
+    __extension__ union
+    {
+      int __spins;
+      __pthread_slist_t __list;
+    };
+  } __data;
+  char __size[__SIZEOF_PTHREAD_MUTEX_T];
+  long int __align;
+} pthread_mutex_t;
+
+typedef union
+{
+  char __size[__SIZEOF_PTHREAD_MUTEXATTR_T];
+  long int __align;
+} pthread_mutexattr_t;
+
+
+/* Data structure for conditional variable handling.  The structure of
+   the attribute type is not exposed on purpose.  */
+typedef union
+{
+  struct
+  {
+    int __lock;
+    unsigned int __futex;
+    __extension__ unsigned long long int __total_seq;
+    __extension__ unsigned long long int __wakeup_seq;
+    __extension__ unsigned long long int __woken_seq;
+    void *__mutex;
+    unsigned int __nwaiters;
+    unsigned int __broadcast_seq;
+  } __data;
+  char __size[__SIZEOF_PTHREAD_COND_T];
+  __extension__ long long int __align;
+} pthread_cond_t;
+
+typedef union
+{
+  char __size[__SIZEOF_PTHREAD_CONDATTR_T];
+  long int __align;
+} pthread_condattr_t;
+
+
+/* Keys for thread-specific data */
+typedef unsigned int pthread_key_t;
+
+
+/* Once-only execution */
+typedef int pthread_once_t;
+
+
+#if defined __USE_UNIX98 || defined __USE_XOPEN2K
+/* Data structure for read-write lock variable handling.  The
+   structure of the attribute type is not exposed on purpose.  */
+typedef union
+{
+  struct
+  {
+    int __lock;
+    unsigned int __nr_readers;
+    unsigned int __readers_wakeup;
+    unsigned int __writer_wakeup;
+    unsigned int __nr_readers_queued;
+    unsigned int __nr_writers_queued;
+    /* FLAGS must stay at this position in the structure to maintain
+       binary compatibility.  */
+    unsigned char __flags;
+    unsigned char __shared;
+    unsigned char __pad1;
+    unsigned char __pad2;
+    int __writer;
+  } __data;
+  char __size[__SIZEOF_PTHREAD_RWLOCK_T];
+  long int __align;
+} pthread_rwlock_t;
+
+typedef union
+{
+  char __size[__SIZEOF_PTHREAD_RWLOCKATTR_T];
+  long int __align;
+} pthread_rwlockattr_t;
+#endif
+
+
+#ifdef __USE_XOPEN2K
+/* POSIX spinlock data type.  */
+typedef volatile int pthread_spinlock_t;
+
+
+/* POSIX barriers data type.  The structure of the type is
+   deliberately not exposed.  */
+typedef union
+{
+  char __size[__SIZEOF_PTHREAD_BARRIER_T];
+  long int __align;
+} pthread_barrier_t;
+
+typedef union
+{
+  char __size[__SIZEOF_PTHREAD_BARRIERATTR_T];
+  int __align;
+} pthread_barrierattr_t;
+#endif
+/* Extra attributes for the cleanup functions.  */
+/*
+ FIXME, check this after gcc uprgrade.
+ #define __cleanup_fct_attribute __attribute__ ((__regparm__ (1)))
+ warning: '__regparm__' attribute directive ignored
+*/
+
+#endif	/* bits/pthreadtypes.h */
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/bits/semaphore.h b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/bits/semaphore.h
new file mode 100644
index 000000000..8ee77429a
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/bits/semaphore.h
@@ -0,0 +1,38 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _SEMAPHORE_H
+# error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
+#endif
+
+
+#define __SIZEOF_SEM_T 16
+
+
+/* Value returned if `sem_open' failed.  */
+#define SEM_FAILED      ((sem_t *) 0)
+
+/* Maximum value the semaphore can have.  */
+#define SEM_VALUE_MAX   (2147483647)
+
+
+typedef union
+{
+  char __size[__SIZEOF_SEM_T];
+  long int __align;
+} sem_t;
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/clone.S b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/clone.S
new file mode 100644
index 000000000..94b39fcf9
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/clone.S
@@ -0,0 +1,4 @@
+/* We want an #include_next, but we are the main source file.
+   So, #include ourselves and in that incarnation we can use #include_next.  */
+# define RESET_PID
+# include <libc/sysdeps/linux/nds32/clone.S>
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/createthread.c b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/createthread.c
new file mode 100644
index 000000000..486bc24f5
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/createthread.c
@@ -0,0 +1,22 @@
+/* Copyright (C) 2005-2013 Free Software Foundation, Inc.
+
+   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/>.  */
+
+/* Value passed to 'clone' for initialization of the thread register.  */
+#define TLS_VALUE ((void *) (pd) \
+		   + TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE)
+
+/* Get the real implementation.	 */
+#include <sysdeps/pthread/createthread.c>
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/fork.c b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/fork.c
new file mode 100644
index 000000000..beb6cb0f7
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/fork.c
@@ -0,0 +1,27 @@
+/* Copyright (C) 2005 Free Software Foundation, Inc.
+   Contributed by Phil Blundell <pb@nexus.co.uk>, 2005
+
+   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/>.  */
+#include <sched.h>
+#include <signal.h>
+#include <sysdep.h>
+#include <tls.h>
+
+#define ARCH_FORK() \
+  INLINE_SYSCALL (clone, 5,                                                  \
+                 CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, 0,     \
+                 NULL, NULL, &THREAD_SELF->tid)
+
+#include "../fork.c"
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/lowlevellock.h b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/lowlevellock.h
new file mode 100644
index 000000000..32b004486
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/lowlevellock.h
@@ -0,0 +1,323 @@
+/* Copyright (C) 2005-2013 Free Software Foundation, Inc.
+
+   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 _LOWLEVELLOCK_H
+#define _LOWLEVELLOCK_H	1
+
+#include <time.h>
+#include <sys/param.h>
+#include <bits/pthreadtypes.h>
+#include <atomic.h>
+#include <sysdep.h>
+#include <bits/kernel-features.h>
+
+
+#define FUTEX_WAIT		0
+#define FUTEX_WAKE		1
+#define FUTEX_REQUEUE		3
+#define FUTEX_CMP_REQUEUE	4
+#define FUTEX_WAKE_OP		5
+#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE	((4 << 24) | 1)
+#define FUTEX_LOCK_PI		6
+#define FUTEX_UNLOCK_PI		7
+#define FUTEX_TRYLOCK_PI	8
+#define FUTEX_WAIT_BITSET	9
+#define FUTEX_WAKE_BITSET	10
+#define FUTEX_WAIT_REQUEUE_PI   11
+#define FUTEX_CMP_REQUEUE_PI    12
+#define FUTEX_PRIVATE_FLAG	128
+#define FUTEX_CLOCK_REALTIME	256
+
+#define FUTEX_BITSET_MATCH_ANY	0xffffffff
+
+/* Values for 'private' parameter of locking macros.  Yes, the
+   definition seems to be backwards.  But it is not.  The bit will be
+   reversed before passing to the system call.  */
+#define LLL_PRIVATE	0
+#define LLL_SHARED	FUTEX_PRIVATE_FLAG
+
+
+#if !defined NOT_IN_libc || defined IS_IN_rtld
+/* In libc.so or ld.so all futexes are private.  */
+# ifdef __ASSUME_PRIVATE_FUTEX
+#  define __lll_private_flag(fl, private) \
+  ((fl) | FUTEX_PRIVATE_FLAG)
+# else
+#  define __lll_private_flag(fl, private) \
+  ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex))
+# endif
+#else
+# ifdef __ASSUME_PRIVATE_FUTEX
+#  define __lll_private_flag(fl, private) \
+  (((fl) | FUTEX_PRIVATE_FLAG) ^ (private))
+# else
+#  define __lll_private_flag(fl, private) \
+  (__builtin_constant_p (private)					      \
+   ? ((private) == 0							      \
+      ? ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex))	      \
+      : (fl))								      \
+   : ((fl) | (((private) ^ FUTEX_PRIVATE_FLAG)				      \
+	      & THREAD_GETMEM (THREAD_SELF, header.private_futex))))
+# endif
+#endif
+
+
+#define lll_futex_wait(futexp, val, private) \
+  lll_futex_timed_wait(futexp, val, NULL, private)
+
+#define lll_futex_timed_wait(futexp, val, timespec, private) \
+  ({									      \
+    INTERNAL_SYSCALL_DECL (__err);					      \
+    long int __ret;							      \
+    __ret = INTERNAL_SYSCALL (futex, __err, 4, (futexp),		      \
+			      __lll_private_flag (FUTEX_WAIT, private),	      \
+			      (val), (timespec));			      \
+    __ret;								      \
+  })
+
+#define lll_futex_timed_wait_bitset(futexp, val, timespec, clockbit, private) \
+  ({									\
+    INTERNAL_SYSCALL_DECL (__err);					\
+    long int __ret;							\
+    int __op = FUTEX_WAIT_BITSET | clockbit;				\
+    __ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp),		\
+			      __lll_private_flag (__op, private),	\
+			      (val), (timespec), NULL /* Unused.  */,	\
+			      FUTEX_BITSET_MATCH_ANY);			\
+    __ret;								\
+  })
+
+#define lll_futex_wake(futexp, nr, private) \
+  ({									      \
+    INTERNAL_SYSCALL_DECL (__err);					      \
+    long int __ret;							      \
+    __ret = INTERNAL_SYSCALL (futex, __err, 4, (futexp),		      \
+			      __lll_private_flag (FUTEX_WAKE, private),	      \
+			      (nr), 0);					      \
+    __ret;								      \
+  })
+
+#define lll_robust_dead(futexv, private) \
+  do									      \
+    {									      \
+      int *__futexp = &(futexv);					      \
+      atomic_or (__futexp, FUTEX_OWNER_DIED);				      \
+      lll_futex_wake (__futexp, 1, private);				      \
+    }									      \
+  while (0)
+
+/* Returns non-zero if error happened, zero if success.  */
+#define lll_futex_requeue(futexp, nr_wake, nr_move, mutex, val, private) \
+  ({									      \
+    INTERNAL_SYSCALL_DECL (__err);					      \
+    long int __ret;							      \
+    __ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp),		      \
+			      __lll_private_flag (FUTEX_CMP_REQUEUE, private),\
+			      (nr_wake), (nr_move), (mutex), (val));	      \
+    INTERNAL_SYSCALL_ERROR_P (__ret, __err);				      \
+  })
+
+
+/* Returns non-zero if error happened, zero if success.  */
+#define lll_futex_wake_unlock(futexp, nr_wake, nr_wake2, futexp2, private) \
+  ({									      \
+    INTERNAL_SYSCALL_DECL (__err);					      \
+    long int __ret;							      \
+    __ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp),		      \
+			      __lll_private_flag (FUTEX_WAKE_OP, private),    \
+			      (nr_wake), (nr_wake2), (futexp2),		      \
+			      FUTEX_OP_CLEAR_WAKE_IF_GT_ONE);		      \
+    INTERNAL_SYSCALL_ERROR_P (__ret, __err);				      \
+  })
+
+/* Priority Inheritance support.  */
+#define lll_futex_wait_requeue_pi(futexp, val, mutex, private) \
+  lll_futex_timed_wait_requeue_pi (futexp, val, NULL, 0, mutex, private)
+
+#define lll_futex_timed_wait_requeue_pi(futexp, val, timespec, clockbit,      \
+					mutex, private)			      \
+  ({									      \
+    INTERNAL_SYSCALL_DECL (__err);					      \
+    int __op = FUTEX_WAIT_REQUEUE_PI | clockbit;			      \
+									      \
+    INTERNAL_SYSCALL (futex, __err, 5, (futexp),			      \
+		      __lll_private_flag (__op, private),		      \
+		      (val), (timespec), mutex); 			      \
+  })
+
+#define lll_futex_cmp_requeue_pi(futexp, nr_wake, nr_move, mutex, val, priv)  \
+  ({									      \
+    INTERNAL_SYSCALL_DECL (__err);					      \
+    long int __ret;							      \
+									      \
+    __ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp),		      \
+			      __lll_private_flag (FUTEX_CMP_REQUEUE_PI, priv),\
+			      (nr_wake), (nr_move), (mutex), (val));	      \
+    INTERNAL_SYSCALL_ERROR_P (__ret, __err);				      \
+  })
+
+
+#define lll_trylock(lock)	\
+  atomic_compare_and_exchange_val_acq(&(lock), 1, 0)
+
+#define lll_cond_trylock(lock)	\
+  atomic_compare_and_exchange_val_acq(&(lock), 2, 0)
+
+#define __lll_robust_trylock(futex, id) \
+  (atomic_compare_and_exchange_val_acq (futex, id, 0) != 0)
+#define lll_robust_trylock(lock, id) \
+  __lll_robust_trylock (&(lock), id)
+
+extern void __lll_lock_wait_private (int *futex) attribute_hidden;
+extern void __lll_lock_wait (int *futex, int private) attribute_hidden;
+extern int __lll_robust_lock_wait (int *futex, int private) attribute_hidden;
+
+#define __lll_lock(futex, private)					      \
+  ((void) ({								      \
+    int *__futex = (futex);						      \
+    if (__builtin_expect (atomic_compare_and_exchange_val_acq (__futex,       \
+								1, 0), 0))    \
+      {									      \
+	if (__builtin_constant_p (private) && (private) == LLL_PRIVATE)	      \
+	  __lll_lock_wait_private (__futex);				      \
+	else								      \
+	  __lll_lock_wait (__futex, private);				      \
+      }									      \
+  }))
+#define lll_lock(futex, private) __lll_lock (&(futex), private)
+
+
+#define __lll_robust_lock(futex, id, private)				      \
+  ({									      \
+    int *__futex = (futex);						      \
+    int __val = 0;							      \
+									      \
+    if (__builtin_expect (atomic_compare_and_exchange_bool_acq (__futex, id,  \
+								0), 0))	      \
+      __val = __lll_robust_lock_wait (__futex, private);		      \
+    __val;								      \
+  })
+#define lll_robust_lock(futex, id, private) \
+  __lll_robust_lock (&(futex), id, private)
+
+
+#define __lll_cond_lock(futex, private)					      \
+  ((void) ({								      \
+    int *__futex = (futex);						      \
+    if (__builtin_expect (atomic_exchange_acq (__futex, 2), 0))		      \
+      __lll_lock_wait (__futex, private);				      \
+  }))
+#define lll_cond_lock(futex, private) __lll_cond_lock (&(futex), private)
+
+
+#define lll_robust_cond_lock(futex, id, private) \
+  __lll_robust_lock (&(futex), (id) | FUTEX_WAITERS, private)
+
+
+extern int __lll_timedlock_wait (int *futex, const struct timespec *,
+				 int private) attribute_hidden;
+extern int __lll_robust_timedlock_wait (int *futex, const struct timespec *,
+					int private) attribute_hidden;
+
+#define __lll_timedlock(futex, abstime, private)			      \
+  ({									      \
+     int *__futex = (futex);						      \
+     int __val = 0;							      \
+									      \
+     if (__builtin_expect (atomic_exchange_acq (__futex, 1), 0))	      \
+       __val = __lll_timedlock_wait (__futex, abstime, private);	      \
+     __val;								      \
+  })
+#define lll_timedlock(futex, abstime, private) \
+  __lll_timedlock (&(futex), abstime, private)
+
+
+#define __lll_robust_timedlock(futex, abstime, id, private)		      \
+  ({									      \
+    int *__futex = (futex);						      \
+    int __val = 0;							      \
+									      \
+    if (__builtin_expect (atomic_compare_and_exchange_bool_acq (__futex, id,  \
+								0), 0))	      \
+      __val = __lll_robust_timedlock_wait (__futex, abstime, private);	      \
+    __val;								      \
+  })
+#define lll_robust_timedlock(futex, abstime, id, private) \
+  __lll_robust_timedlock (&(futex), abstime, id, private)
+
+
+#define __lll_unlock(futex, private) \
+  (void)							\
+    ({ int *__futex = (futex);					\
+       int __oldval = atomic_exchange_rel (__futex, 0);		\
+       if (__builtin_expect (__oldval > 1, 0))			\
+	 lll_futex_wake (__futex, 1, private);			\
+       lll_futex_wake (__futex, 1, private);			\
+    })
+#define lll_unlock(futex, private) __lll_unlock(&(futex), private)
+
+
+#define __lll_robust_unlock(futex, private) \
+  (void)							\
+    ({ int *__futex = (futex);					\
+       int __oldval = atomic_exchange_rel (__futex, 0);		\
+       if (__builtin_expect (__oldval & FUTEX_WAITERS, 0))	\
+	 lll_futex_wake (__futex, 1, private);			\
+       lll_futex_wake (__futex, 1, private);			\
+    })
+#define lll_robust_unlock(futex, private) \
+  __lll_robust_unlock(&(futex), private)
+
+
+#define lll_islocked(futex) \
+  (futex != 0)
+
+
+/* Our internal lock implementation is identical to the binary-compatible
+   mutex implementation. */
+
+/* Initializers for lock.  */
+#define LLL_LOCK_INITIALIZER		(0)
+#define LLL_LOCK_INITIALIZER_LOCKED	(1)
+
+/* The states of a lock are:
+    0  -  untaken
+    1  -  taken by one user
+   >1  -  taken by more users */
+
+/* The kernel notifies a process which uses CLONE_CHILD_CLEARTID via futex
+   wakeup when the clone terminates.  The memory location contains the
+   thread ID while the clone is running and is reset to zero
+   afterwards.	*/
+#define lll_wait_tid(tid) \
+  do {					\
+    __typeof (tid) __tid;		\
+    while ((__tid = (tid)) != 0)	\
+      lll_futex_wait (&(tid), __tid, LLL_SHARED);\
+  } while (0)
+
+extern int __lll_timedwait_tid (int *, const struct timespec *)
+     attribute_hidden;
+
+#define lll_timedwait_tid(tid, abstime) \
+  ({							\
+    int __res = 0;					\
+    if ((tid) != 0)					\
+      __res = __lll_timedwait_tid (&(tid), (abstime));	\
+    __res;						\
+  })
+
+#endif	/* lowlevellock.h */
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/pt-raise.c b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/pt-raise.c
new file mode 100644
index 000000000..6c0d4b5d3
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/pt-raise.c
@@ -0,0 +1,18 @@
+/* Copyright (C) 2002-2013 Free Software Foundation, Inc.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   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/>.  */
+
+#include <nptl/sysdeps/unix/sysv/linux/raise.c>
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/pthread_once.c b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/pthread_once.c
new file mode 100644
index 000000000..ce68ce68c
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/pthread_once.c
@@ -0,0 +1,92 @@
+/* Copyright (C) 2003-2013 Free Software Foundation, Inc.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
+
+   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/>.  */
+
+#include "pthreadP.h"
+#include <lowlevellock.h>
+
+
+unsigned long int __fork_generation attribute_hidden;
+
+
+static void
+clear_once_control (void *arg)
+{
+  pthread_once_t *once_control = (pthread_once_t *) arg;
+
+  *once_control = 0;
+  lll_futex_wake (once_control, INT_MAX, LLL_PRIVATE);
+}
+
+
+int
+__pthread_once (once_control, init_routine)
+     pthread_once_t *once_control;
+     void (*init_routine) (void);
+{
+  while (1)
+    {
+      int oldval, val, newval;
+
+      val = *once_control;
+      do
+	{
+	  /* Check if the initialized has already been done.  */
+	  if ((val & 2) != 0)
+	    return 0;
+
+	  oldval = val;
+	  newval = (oldval & 3) | __fork_generation | 1;
+	  val = atomic_compare_and_exchange_val_acq (once_control, newval,
+						     oldval);
+	}
+      while (__builtin_expect (val != oldval, 0));
+
+      /* Check if another thread already runs the initializer.	*/
+      if ((oldval & 1) != 0)
+	{
+	  /* Check whether the initializer execution was interrupted
+	     by a fork.	 */
+	  if (((oldval ^ newval) & -4) == 0)
+	    {
+	      /* Same generation, some other thread was faster. Wait.  */
+	      lll_futex_wait (once_control, newval, LLL_PRIVATE);
+	      continue;
+	    }
+	}
+
+      /* This thread is the first here.  Do the initialization.
+	 Register a cleanup handler so that in case the thread gets
+	 interrupted the initialization can be restarted.  */
+      pthread_cleanup_push (clear_once_control, once_control);
+
+      init_routine ();
+
+      pthread_cleanup_pop (0);
+
+
+      /* Add one to *once_control.  */
+      atomic_increment (once_control);
+
+      /* Wake up all other threads.  */
+      lll_futex_wake (once_control, INT_MAX, LLL_PRIVATE);
+      break;
+    }
+
+  return 0;
+}
+weak_alias (__pthread_once, pthread_once)
+strong_alias (__pthread_once, __pthread_once_internal)
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/sysdep-cancel.h b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/sysdep-cancel.h
new file mode 100644
index 000000000..a0f4de5c8
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/sysdep-cancel.h
@@ -0,0 +1,273 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 2003-2013 Free Software Foundation, Inc.
+
+   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/>.  */
+
+#include <sysdep.h>
+#include <tls.h>
+#ifndef __ASSEMBLER__
+# include <pthreadP.h>
+#endif
+
+
+
+#define PUSHARGS_0
+#define PUSHARGS_1	smw.adm $r0, [$sp], $r0, #0;	\
+			cfi_adjust_cfa_offset(4);	\
+			cfi_rel_offset(r0,0);		\
+			addi	$sp, $sp, -4;		\
+			cfi_adjust_cfa_offset(4);
+#define PUSHARGS_2	smw.adm $r0, [$sp], $r1, #0;	\
+			cfi_adjust_cfa_offset(8);	\
+			cfi_rel_offset(r1, 4);		\
+			cfi_rel_offset(r0, 0);
+#define PUSHARGS_3	smw.adm $r0, [$sp], $r2, #0;	\
+			cfi_adjust_cfa_offset(12);	\
+			cfi_rel_offset(r2, 8);		\
+			cfi_rel_offset(r1, 4);		\
+			cfi_rel_offset(r0, 0);		\
+			addi	$sp, $sp, -4;		\
+			cfi_adjust_cfa_offset(4);
+#define PUSHARGS_4	smw.adm $r0, [$sp], $r3, #0;	\
+			cfi_adjust_cfa_offset(16);	\
+			cfi_rel_offset(r3, 12);		\
+			cfi_rel_offset(r2, 8);		\
+			cfi_rel_offset(r1, 4);		\
+			cfi_rel_offset(r0, 0);
+#define PUSHARGS_5	smw.adm $r0, [$sp], $r4, #0;	\
+			cfi_adjust_cfa_offset(20);	\
+			cfi_rel_offset(r4, 16);		\
+			cfi_rel_offset(r3, 12);		\
+			cfi_rel_offset(r2, 8);		\
+			cfi_rel_offset(r1, 4);		\
+			cfi_rel_offset(r0, 0);		\
+			addi	$sp, $sp, -4;		\
+			cfi_adjust_cfa_offset(4);
+#define PUSHARGS_6	smw.adm $r0, [$sp], $r5, #0;	\
+			cfi_adjust_cfa_offset(24);	\
+			cfi_rel_offset(r5, 20);		\
+			cfi_rel_offset(r4, 16);		\
+			cfi_rel_offset(r3, 12);		\
+			cfi_rel_offset(r2, 8);		\
+			cfi_rel_offset(r1, 4);		\
+			cfi_rel_offset(r0, 0);
+
+#define POPARGS2_0
+#define POPARGS2_1	addi	$sp, $sp, 4;		\
+			cfi_adjust_cfa_offset(-4);	\
+			lmw.bim $r0, [$sp], $r0, #0;	\
+			cfi_adjust_cfa_offset(-4);	\
+			cfi_restore(r0);
+#define POPARGS2_2	lmw.bim $r0, [$sp], $r1, #0;	\
+			cfi_adjust_cfa_offset(-8);	\
+			cfi_restore(r0);		\
+			cfi_restore(r1);
+#define POPARGS2_3	addi	$sp, $sp, 4;		\
+			cfi_adjust_cfa_offset(-4);	\
+			lmw.bim $r0, [$sp], $r2, #0;	\
+			cfi_adjust_cfa_offset(-12);	\
+			cfi_restore(r0);		\
+			cfi_restore(r1);		\
+			cfi_restore(r2);
+#define POPARGS2_4	lmw.bim $r0, [$sp], $r3, #0;	\
+			cfi_adjust_cfa_offset(-16);	\
+			cfi_restore(r0);		\
+			cfi_restore(r1);		\
+			cfi_restore(r2);		\
+			cfi_restore(r3);
+#define POPARGS2_5	addi	$sp, $sp, 4;		\
+			cfi_adjust_cfa_offset(-4);	\
+			lmw.bim $r0, [$sp], $r4, #0;	\
+			cfi_adjust_cfa_offset(-20);	\
+			cfi_restore(r0);		\
+			cfi_restore(r1);		\
+			cfi_restore(r2);		\
+			cfi_restore(r3);		\
+			cfi_restore(r4);
+#define POPARGS2_6	lmw.bim $r0, [$sp], $r5, #0;	\
+			cfi_adjust_cfa_offset(-24);	\
+			cfi_restore(r0);		\
+			cfi_restore(r1);		\
+			cfi_restore(r2);		\
+			cfi_restore(r3);		\
+			cfi_restore(r4);		\
+			cfi_restore(r5);
+
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
+
+/* NOTE: We do mark syscalls with unwind annotations, for the benefit of
+   cancellation; but they're really only accurate at the point of the
+   syscall.  The ARM unwind directives are not rich enough without adding
+   a custom personality function.  */
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args)				\
+  .align 2;                                                             \
+  ENTRY (__##syscall_name##_nocancel);					\
+  __do_syscall(syscall_name);                                           \
+  PSEUDO_RET;                                                           \
+  ret;							                \
+  END (__##syscall_name##_nocancel);					\
+  ENTRY (name);								\
+  smw.adm $r6,[$sp],$r6,0x2;                                            \
+  cfi_adjust_cfa_offset(8); 						\
+  cfi_offset(r6,-8);						\
+  cfi_offset(lp,-4);						\
+  SINGLE_THREAD_P ($r15);                                               \
+  bgtz $r15, .Lpseudo_cancel;                                           \
+  __do_syscall(syscall_name);                                           \
+  j 50f;                                                                \
+  .Lpseudo_cancel:							\
+	PUSHARGS_##args;	/* save syscall args etc. around CENABLE.  */	\
+	CENABLE ($r5);							\
+	mov55 $r6, $r0;		/* put mask in safe place.  */    	\
+	POPARGS2_##args;                                                \
+	__do_syscall(syscall_name);		/* do the call.  */	\
+	push $r0;                                                       \
+	cfi_adjust_cfa_offset(4);					\
+	cfi_rel_offset(r0, 0);						\
+	addi $sp, $sp, -4;						\
+	cfi_adjust_cfa_offset(4);					\
+        mov55	$r0, $r6;		/* save syscall return value. */\
+	CDISABLE($r5);							\
+	addi $sp, $sp, 4;						\
+	cfi_adjust_cfa_offset(-4);					\
+        pop $r0;                          /* retrieve return value.  */	\
+	cfi_adjust_cfa_offset(-4);					\
+	cfi_restore(r0);						\
+50:									\
+  lmw.bim $r6,[$sp],$r6, 0x2;                                           \
+  cfi_adjust_cfa_offset(-8); 						\
+  cfi_restore(lp);							\
+  cfi_restore(r6);							\
+  PSEUDO_RET;
+# ifndef __ASSEMBLER__
+//#  if defined IS_IN_libpthread || !defined NOT_IN_libc
+//extern int __local_multiple_threads attribute_hidden;
+//#  define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
+//#  else
+/*  There is no __local_multiple_threads for librt */
+#  define SINGLE_THREAD_P __builtin_expect (THREAD_GETMEM (THREAD_SELF,       \
+				           header.multiple_threads) == 0, 1)
+//#  endif
+# else
+#   define SINGLE_THREAD_P(reg)            \
+    addi reg, $r25, MULTIPLE_THREADS_OFFSET; \
+    lw   reg, [reg];
+#   define SINGLE_THREAD_P_PIC(x) SINGLE_THREAD_P(x)
+# endif
+
+
+# ifdef IS_IN_libpthread
+#  define CENABLE(reg)	jmp(reg, __pthread_enable_asynccancel)
+#  define CDISABLE(reg) jmp(reg, __pthread_disable_asynccancel)
+#  define __local_multiple_threads __pthread_multiple_threads
+# elif !defined NOT_IN_libc
+#  define CENABLE(reg)	jmp(reg, __libc_enable_asynccancel)
+#  define CDISABLE(reg)	jmp(reg, __libc_disable_asynccancel)
+#  define __local_multiple_threads __libc_multiple_threads
+# elif defined IS_IN_librt
+#  define CENABLE(reg)	jmp(reg, __librt_enable_asynccancel)
+#  define CDISABLE(reg)	jmp(reg, __librt_disable_asynccancel)
+# else
+#  error Unsupported library
+# endif
+
+#elif !defined __ASSEMBLER__
+
+/* For rtld, et cetera.  */
+# define SINGLE_THREAD_P 1
+# define NO_CANCELLATION 1
+
+#endif
+
+
+
+
+
+
+
+#ifndef __ASSEMBLER__
+# define RTLD_SINGLE_THREAD_P \
+  __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
+				   header.multiple_threads) == 0, 1)
+#endif
+
+
+
+#ifdef PIC
+#define PSEUDO_RET \
+	 .pic \
+   .align 2; \
+   bgez $r0, 1f; \
+   sltsi $r1, $r0, -4096;    \
+   bgtz  $r1, 1f;     \
+   PIC_jmp_err	\
+	 nop; \
+   1:
+#else  /* PIC*/
+#define PSEUDO_RET \
+   .align 2;         \
+   bgez  $r0, 1f; \
+   sltsi $r1, $r0, -4096; \
+   bgtz  $r1, 1f;     \
+   j SYSCALL_ERROR; \
+   1:
+#endif
+
+#ifdef PIC
+#define jmp(reg, symble) PIC_jmpr(reg, symble)
+/* reg: available register */
+#define PIC_jmp_err \
+   smw.adm $sp,[$sp],$sp,#0x6;  \
+   mfusr $r15, $PC;  \
+   sethi $gp,  hi20(_GLOBAL_OFFSET_TABLE_ + 4);  \
+   ori   $gp,  $gp,  lo12(_GLOBAL_OFFSET_TABLE_ + 8);  \
+   add   $gp,  $r15, $gp;  \
+   sethi $r15, hi20(SYSCALL_ERROR@PLT);  \
+   ori   $r15, $r15, lo12(SYSCALL_ERROR@PLT);  \
+   add   $r15, $r15, $gp;  \
+   jral  $r15; \
+   lmw.bim $sp,[$sp],$sp,#0x6; \
+   ret;
+
+#define PIC_jmp(reg, symble) \
+   mfusr $r15, $PC;  \
+   sethi reg,  hi20(_GLOBAL_OFFSET_TABLE_ + 4);  \
+   ori   reg,  reg,  lo12(_GLOBAL_OFFSET_TABLE_ + 8);  \
+   add   reg,  $r15, reg;  \
+   sethi $r15, hi20(symble@PLT);  \
+   ori   $r15, $r15, lo12(symble@PLT);  \
+   add   $r15, $r15, reg;  \
+   jr    $r15;
+
+
+#define PIC_jmpr(reg, symble) \
+   mfusr $r15, $PC;  \
+   sethi reg,  hi20(_GLOBAL_OFFSET_TABLE_ + 4);  \
+   ori   reg,  reg,  lo12(_GLOBAL_OFFSET_TABLE_ + 8);  \
+   add   reg,  $r15, reg;  \
+   sethi $r15, hi20(symble@PLT);  \
+   ori   $r15, $r15, lo12(symble@PLT);  \
+   add   $r15, $r15, reg;  \
+   jral  $r15;
+
+#else
+#define jmp(reg, symble) jal symble
+#endif
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/vfork.S b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/vfork.S
new file mode 100644
index 000000000..f11f76ae1
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/nds32/vfork.S
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2016-2017 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* Copyright (C) 2013 Free Software Foundation, Inc.
+
+   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/>.  */
+
+#include <tls.h>
+
+/* Save the PID value.  */
+#define SAVE_PID \
+	lwi  	$r1, [$r25 + PID_OFFSET];/* Get the thread pointer.  */	\
+	subri	$r1, $r1, 0x0;		 /* Negate it.  */		\
+	bnez	$r1, 1f;		 /* If it was zero... */		\
+	sethi	$r1, 0x80000;		 /* use 0x80000000 instead.  */	\
+1:	swi	$r1, [$r25 + PID_OFFSET];/* Store the temporary PID.  */
+
+/* Restore the old PID value in the parent.  */
+#define RESTORE_PID \
+	beqz	$r0, 1f;		/* If we are the parent... */	\
+	lwi  	$r1, [$r25 + PID_OFFSET];/* Get the thread pointer.  */	\
+	subri	$r1, $r1, 0x0;		/* Re-negate it.  */		\
+	sethi	$r2, 0x80000;		/* Load 0x80000000... */	\
+	bne	$r1, $r2, 2f;		/* ... compare against it... */	\
+	movi	$r1, 0;			/* ... use 0 instead.  */	\
+2:	swi	$r1, [$r25 + PID_OFFSET];/* Restore the PID.  */		\
+1:
+
+#include <../../../../../../../libc/sysdeps/linux/nds32/vfork.S>