Update.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list (msgrcv, msgsnd):
	Make cancelable.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list (msgrcv, msgsnd):
	Likewise.
	* sysdeps/unix/sysv/linux/ia64/syscalls.list (msgrcv, msgsnd):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (msgrcv, msgsnd):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list (msgrcv, msgsnd):
	Likewise.
	* sysdeps/unix/sysv/linux/ia64/sigsuspend.c (__sigsuspend): Likewise.

8 files changed, 467 insertions, 23 deletions

diff --git a/linuxthreads/sysdeps/pthread/bits/libc-lock.h b/linuxthreads/sysdeps/pthread/bits/libc-lock.h
index ceb08b6238..217b0be253 100644
--- a/linuxthreads/sysdeps/pthread/bits/libc-lock.h
+++ b/linuxthreads/sysdeps/pthread/bits/libc-lock.h
@@ -23,6 +23,10 @@
 
 #include <pthread.h>
 
+#if defined _LIBC && !defined NOT_IN_libc
+#include <linuxthreads/internals.h>
+#endif
+
 /* Mutex type.  */
 #if defined(_LIBC) || defined(_IO_MTSAFE_IO)
 typedef pthread_mutex_t __libc_lock_t;
@@ -90,19 +94,30 @@ typedef pthread_key_t __libc_key_t;
 #define _RTLD_LOCK_RECURSIVE_INITIALIZER \
   {PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP}
 
-#ifdef __PIC__
-# define __libc_maybe_call(FUNC, ARGS, ELSE) \
+#if defined _LIBC && defined IS_IN_libpthread
+# define __libc_maybe_call(FUNC, ARGS, ELSE) FUNC ARGS
+#else
+# ifdef __PIC__
+#  define __libc_maybe_call(FUNC, ARGS, ELSE) \
   (__extension__ ({ __typeof (FUNC) *_fn = (FUNC); \
                     _fn != NULL ? (*_fn) ARGS : ELSE; }))
-#else
-# define __libc_maybe_call(FUNC, ARGS, ELSE) \
+# else
+#  define __libc_maybe_call(FUNC, ARGS, ELSE) \
   (FUNC != NULL ? FUNC ARGS : ELSE)
+# endif
+#endif
+#if defined _LIBC && !defined NOT_IN_libc && defined __PIC__
+# define __libc_maybe_call2(FUNC, ARGS, ELSE) \
+  ({__libc_pthread_functions.ptr_##FUNC != NULL \
+    ? __libc_pthread_functions.ptr_##FUNC ARGS : ELSE; })
+#else
+# define __libc_maybe_call2(FUNC, ARGS, ELSE) __libc_maybe_call (__##FUNC, ARGS, ELSE)
 #endif
 
 /* Initialize the named lock variable, leaving it in a consistent, unlocked
    state.  */
 #define __libc_lock_init(NAME) \
-  (__libc_maybe_call (__pthread_mutex_init, (&(NAME), NULL), 0))
+  (__libc_maybe_call2 (pthread_mutex_init, (&(NAME), NULL), 0))
 #define __libc_rwlock_init(NAME) \
   (__libc_maybe_call (__pthread_rwlock_init, (&(NAME), NULL), 0));
 
@@ -125,7 +140,7 @@ typedef pthread_key_t __libc_key_t;
    used again until __libc_lock_init is called again on it.  This must be
    called on a lock variable before the containing storage is reused.  */
 #define __libc_lock_fini(NAME) \
-  (__libc_maybe_call (__pthread_mutex_destroy, (&(NAME)), 0));
+  (__libc_maybe_call2 (pthread_mutex_destroy, (&(NAME)), 0));
 #define __libc_rwlock_fini(NAME) \
   (__libc_maybe_call (__pthread_rwlock_destroy, (&(NAME)), 0));
 
@@ -135,7 +150,7 @@ typedef pthread_key_t __libc_key_t;
 
 /* Lock the named lock variable.  */
 #define __libc_lock_lock(NAME) \
-  (__libc_maybe_call (__pthread_mutex_lock, (&(NAME)), 0));
+  (__libc_maybe_call2 (pthread_mutex_lock, (&(NAME)), 0));
 #define __libc_rwlock_rdlock(NAME) \
   (__libc_maybe_call (__pthread_rwlock_rdlock, (&(NAME)), 0));
 #define __libc_rwlock_wrlock(NAME) \
@@ -147,7 +162,7 @@ typedef pthread_key_t __libc_key_t;
 
 /* Try to lock the named lock variable.  */
 #define __libc_lock_trylock(NAME) \
-  (__libc_maybe_call (__pthread_mutex_trylock, (&(NAME)), 0))
+  (__libc_maybe_call2 (pthread_mutex_trylock, (&(NAME)), 0))
 #define __libc_rwlock_tryrdlock(NAME) \
   (__libc_maybe_call (__pthread_rwlock_tryrdlock, (&(NAME)), 0))
 #define __libc_rwlock_trywrlock(NAME) \
@@ -160,7 +175,7 @@ typedef pthread_key_t __libc_key_t;
 
 /* Unlock the named lock variable.  */
 #define __libc_lock_unlock(NAME) \
-  (__libc_maybe_call (__pthread_mutex_unlock, (&(NAME)), 0));
+  (__libc_maybe_call2 (pthread_mutex_unlock, (&(NAME)), 0));
 #define __libc_rwlock_unlock(NAME) \
   (__libc_maybe_call (__pthread_rwlock_unlock, (&(NAME)), 0));
 
diff --git a/linuxthreads/sysdeps/pthread/flockfile.c b/linuxthreads/sysdeps/pthread/flockfile.c
new file mode 100644
index 0000000000..a90215cc1f
--- /dev/null
+++ b/linuxthreads/sysdeps/pthread/flockfile.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   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.  */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <libio.h>
+#include <bits/stdio-lock.h>
+
+
+void
+__flockfile (stream)
+     FILE *stream;
+{
+  _IO_lock_lock (*stream->_lock);
+}
+strong_alias (__flockfile, _IO_flockfile)
+strong_alias (__flockfile, flockfile)
diff --git a/linuxthreads/sysdeps/pthread/ftrylockfile.c b/linuxthreads/sysdeps/pthread/ftrylockfile.c
new file mode 100644
index 0000000000..21c1ea01ed
--- /dev/null
+++ b/linuxthreads/sysdeps/pthread/ftrylockfile.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   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.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <bits/stdio-lock.h>
+
+
+int
+__ftrylockfile (stream)
+     FILE *stream;
+{
+  return _IO_lock_trylock (*stream->_lock);
+}
+strong_alias (__ftrylockfile, _IO_ftrylockfile)
+weak_alias (__ftrylockfile, ftrylockfile)
diff --git a/linuxthreads/sysdeps/pthread/funlockfile.c b/linuxthreads/sysdeps/pthread/funlockfile.c
new file mode 100644
index 0000000000..f941fc9851
--- /dev/null
+++ b/linuxthreads/sysdeps/pthread/funlockfile.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   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.  */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <libio.h>
+#include <bits/stdio-lock.h>
+
+
+void
+__funlockfile (stream)
+     FILE *stream;
+{
+  _IO_lock_unlock (*stream->_lock);
+}
+strong_alias (__funlockfile, _IO_funlockfile)
+weak_alias (__funlockfile, funlockfile)
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c b/linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c
new file mode 100644
index 0000000000..a18753233a
--- /dev/null
+++ b/linuxthreads/sysdeps/unix/sysv/linux/allocrtsig.c
@@ -0,0 +1,85 @@
+/* Handle real-time signal allocation.
+   Copyright (C) 1997,98,99,2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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.  */
+
+#include <signal.h>
+
+/* Sanity check.  */
+#if !defined __SIGRTMIN || (__SIGRTMAX - __SIGRTMIN) < 3
+# error "This must not happen"
+#endif
+
+static int current_rtmin;
+static int current_rtmax;
+
+static int initialized;
+
+#include <testrtsig.h>
+
+static void
+init (void)
+{
+  if (!kernel_has_rtsig ())
+    {
+      current_rtmin = -1;
+      current_rtmax = -1;
+    }
+  else
+    {
+      current_rtmin = __SIGRTMIN + 3;
+      current_rtmax = __SIGRTMAX;
+    }
+  initialized = 1;
+}
+
+/* Return number of available real-time signal with highest priority.  */
+int
+__libc_current_sigrtmin (void)
+{
+  if (!initialized)
+    init ();
+  return current_rtmin;
+}
+strong_alias (__libc_current_sigrtmin, __libc_current_sigrtmin_private);
+
+/* Return number of available real-time signal with lowest priority.  */
+int
+__libc_current_sigrtmax (void)
+{
+  if (!initialized)
+    init ();
+  return current_rtmax;
+}
+strong_alias (__libc_current_sigrtmax, __libc_current_sigrtmax_private);
+
+/* Allocate real-time signal with highest/lowest available
+   priority.  Please note that we don't use a lock since we assume
+   this function to be called at program start.  */
+int
+__libc_allocate_rtsig (int high)
+{
+  if (!initialized)
+    init ();
+  if (current_rtmin == -1 || current_rtmin > current_rtmax)
+    /* We don't have anymore signal available.  */
+    return -1;
+
+  return high ? current_rtmin++ : current_rtmax--;
+}
+strong_alias (__libc_allocate_rtsig, __libc_allocate_rtsig_private);
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h b/linuxthreads/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h
new file mode 100644
index 0000000000..30be0b9c5f
--- /dev/null
+++ b/linuxthreads/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h
@@ -0,0 +1,124 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@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.  */
+
+#include <sysdep.h>
+#include <tls.h>
+#include <pt-machine.h>
+#ifndef ASSEMBLER
+# include <linuxthreads/internals.h>
+#endif
+
+#if defined FLOATING_STACKS && USE___THREAD
+# define MULTIPLE_THREADS_OFFSET	12
+#endif
+
+#if !defined NOT_IN_libc || defined IS_IN_libpthread
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args)				      \
+  .text;								      \
+  ENTRY (name)								      \
+    SINGLE_THREAD_P;							      \
+    jne L(pseudo_cancel);						      \
+    DO_CALL (syscall_name, args);					      \
+    cmpl $-4095, %eax;							      \
+    jae SYSCALL_ERROR_LABEL;						      \
+    ret;								      \
+  L(pseudo_cancel):							      \
+    CENABLE								      \
+    SAVE_OLDTYPE_##args							      \
+    PUSHARGS_##args							      \
+    DOCARGS_##args							      \
+    movl $SYS_ify (syscall_name), %eax;					      \
+    int $0x80								      \
+    POPARGS_##args;							      \
+    POPCARGS_##args							      \
+    cmpl $-4095, %eax;							      \
+    jae SYSCALL_ERROR_LABEL;						      \
+  L(pseudo_end):
+
+# define SAVE_OLDTYPE_0	movl %eax, %edx;
+# define SAVE_OLDTYPE_1	SAVE_OLDTYPE_0
+# define SAVE_OLDTYPE_2	pushl %eax;
+# define SAVE_OLDTYPE_3	SAVE_OLDTYPE_2
+# define SAVE_OLDTYPE_4	SAVE_OLDTYPE_2
+# define SAVE_OLDTYPE_5	SAVE_OLDTYPE_2
+
+# define DOCARGS_0	DOARGS_0
+# define DOCARGS_1	DOARGS_1
+# define DOCARGS_2	_DOARGS_2 (12)
+# define DOCARGS_3	_DOARGS_3 (20)
+# define DOCARGS_4	_DOARGS_4 (28)
+# define DOCARGS_5	_DOARGS_5 (36)
+
+# ifdef IS_IN_libpthread
+#  define CENABLE	call __pthread_enable_asynccancel;
+#  define CDISABLE	call __pthread_disable_asynccancel
+# else
+#  define CENABLE	call __libc_enable_asynccancel;
+#  define CDISABLE	call __libc_disable_asynccancel
+# endif
+# define POPCARGS_0	pushl %eax; movl %ecx, %eax; CDISABLE; popl %eax;
+# define POPCARGS_1	POPCARGS_0
+# define POPCARGS_2	xchgl (%esp), %eax; CDISABLE; popl %eax;
+# define POPCARGS_3	POPCARGS_2
+# define POPCARGS_4	POPCARGS_2
+# define POPCARGS_5	POPCARGS_2
+
+#if !defined NOT_IN_libc
+# define __local_multiple_threads __libc_multiple_threads
+#else
+# define __local_multiple_threads __pthread_multiple_threads
+#endif
+
+# ifndef ASSEMBLER
+#  if defined MULTIPLE_THREADS_OFFSET && defined PIC
+#   define SINGLE_THREAD_P \
+  __builtin_expect (THREAD_GETMEM (THREAD_SELF,				      \
+				   p_header.data.multiple_threads) == 0, 1)
+#  else
+extern int __local_multiple_threads attribute_hidden;
+#   define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
+#  endif
+# else
+#  if !defined PIC
+#   define SINGLE_THREAD_P cmpl $0, __local_multiple_threads
+#  elif defined MULTIPLE_THREADS_OFFSET
+#   define SINGLE_THREAD_P cmpl $0, %gs:MULTIPLE_THREADS_OFFSET
+#  else
+#   if !defined HAVE_HIDDEN || !USE___THREAD
+#    define SINGLE_THREAD_P \
+  SETUP_PIC_REG (cx);				\
+  addl $_GLOBAL_OFFSET_TABLE_, %ecx;		\
+  cmpl $0, __local_multiple_threads@GOTOFF(%ecx)
+#   else
+#    define SINGLE_THREAD_P \
+  call __i686.get_pc_thunk.cx;			\
+  addl $_GLOBAL_OFFSET_TABLE_, %ecx;		\
+  cmpl $0, __local_multiple_threads@GOTOFF(%ecx)
+#   endif
+#  endif
+# endif
+
+#elif !defined ASSEMBLER
+
+/* This code should never be used but we define it anyhow.  */
+# define SINGLE_THREAD_P (1)
+
+#endif
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h b/linuxthreads/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h
new file mode 100644
index 0000000000..1c7a95dcd8
--- /dev/null
+++ b/linuxthreads/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h
@@ -0,0 +1,118 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@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.  */
+
+#include <sysdep.h>
+#include <tls.h>
+#include <pt-machine.h>
+#ifndef ASSEMBLER
+# include <linuxthreads/internals.h>
+#endif
+
+#if !defined NOT_IN_libc || defined IS_IN_libpthread
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args)				      \
+  .text;								      \
+  ENTRY (name)								      \
+    SINGLE_THREAD_P;							      \
+    jne L(pseudo_cancel);						      \
+    DO_CALL (syscall_name, args);					      \
+    cmpq $-4095, %rax;							      \
+    jae SYSCALL_ERROR_LABEL;						      \
+    ret;								      \
+  L(pseudo_cancel):							      \
+    SAVESTK_##args							      \
+    PUSHARGS_##args							      \
+    CENABLE								      \
+    POPARGS_##args							      \
+    movq %rax, OLDTYPE_##args;						      \
+    movq $SYS_ify (syscall_name), %rax;					      \
+    syscall;								      \
+    xchgq %rax, OLDTYPE_##args;						      \
+    CDISABLE								      \
+    movq OLDTYPE_##args, %rax;						      \
+    RESTSTK_##args							      \
+    cmpq $-4095, %rax;							      \
+    jae SYSCALL_ERROR_LABEL;						      \
+  L(pseudo_end):
+
+# define PUSHARGS_0	/* Nothing.  */
+# define PUSHARGS_1	PUSHARGS_0 movq %rdi, (%rsp);
+# define PUSHARGS_2	PUSHARGS_1 movq %rsi, 8(%rsp);
+# define PUSHARGS_3	PUSHARGS_2 movq %rdx, 16(%rsp);
+# define PUSHARGS_4	PUSHARGS_3 movq %rcx, 24(%rsp);
+# define PUSHARGS_5	PUSHARGS_4 movq %r8, 32(%rsp);
+# define PUSHARGS_6	PUSHARGS_5 movq %r9, 40(%rsp);
+
+# define POPARGS_0	/* Nothing.  */
+# define POPARGS_1	POPARGS_0 movq (%rsp), %rdi;
+# define POPARGS_2	POPARGS_1 movq 8(%rsp), %rsi;
+# define POPARGS_3	POPARGS_2 movq 16(%rsp), %rdx;
+# define POPARGS_4	POPARGS_3 movq 24(%rsp), %r10;
+# define POPARGS_5	POPARGS_4 movq 32(%rsp), %r8;
+# define POPARGS_6	POPARGS_5 movq 40(%rsp), %r9;
+
+# define SAVESTK_0	/* Nothing.  */
+# define SAVESTK_1	subq $16, %rsp;
+# define SAVESTK_2	SAVESTK_1;
+# define SAVESTK_3	subq $32, %rsp;
+# define SAVESTK_4	SAVESTK_3;
+# define SAVESTK_5	subq $48, %rsp;
+# define SAVESTK_6	subq $64, %rsp;
+
+# define RESTSTK_0	/* Nothing.  */
+# define RESTSTK_1	addq $16, %rsp;
+# define RESTSTK_2	RESTSTK_1;
+# define RESTSTK_3	addq $32, %rsp;
+# define RESTSTK_4	RESTSTK_3;
+# define RESTSTK_5	addq $48, %rsp;
+# define RESTSTK_6	addq $64, %rsp;
+
+# define OLDTYPE_0	%r9
+# define OLDTYPE_1	OLDTYPE_0
+# define OLDTYPE_2	OLDTYPE_0
+# define OLDTYPE_3	OLDTYPE_0
+# define OLDTYPE_4	OLDTYPE_0
+# define OLDTYPE_5	OLDTYPE_0
+# define OLDTYPE_6	48(%rsp)
+
+# ifdef IS_IN_libpthread
+#  define CENABLE	call __pthread_enable_asynccancel;
+#  define CDISABLE	call __pthread_disable_asynccancel;
+#  define __local_multiple_threads __pthread_multiple_threads
+# else
+#  define CENABLE	call __libc_enable_asynccancel;
+#  define CDISABLE	call __libc_disable_asynccancel;
+#  define __local_multiple_threads __libc_multiple_threads
+# endif
+
+# ifndef ASSEMBLER
+extern int __local_multiple_threads attribute_hidden;
+#   define SINGLE_THREAD_P \
+  __builtin_expect (__local_multiple_threads == 0, 1)
+# else
+#  define SINGLE_THREAD_P cmpl $0, __local_multiple_threads(%rip)
+# endif
+
+#elif !defined ASSEMBLER
+
+/* This code should never be used but we define it anyhow.  */
+# define SINGLE_THREAD_P (1)
+
+#endif
diff --git a/linuxthreads/sysdeps/x86_64/pt-machine.h b/linuxthreads/sysdeps/x86_64/pt-machine.h
index e0b68d315b..0a366c56eb 100644
--- a/linuxthreads/sysdeps/x86_64/pt-machine.h
+++ b/linuxthreads/sysdeps/x86_64/pt-machine.h
@@ -21,21 +21,22 @@
 #ifndef _PT_MACHINE_H
 #define _PT_MACHINE_H   1
 
-#include <stddef.h>	/* For offsetof.  */
-#include <stdlib.h>	/* For abort().  */
-#include <asm/prctl.h>
+#ifndef __ASSEMBLER__
+# include <stddef.h>	/* For offsetof.  */
+# include <stdlib.h>	/* For abort().  */
+# include <asm/prctl.h>
 
 
-#ifndef PT_EI
-# define PT_EI extern inline
-#endif
+# ifndef PT_EI
+#  define PT_EI extern inline
+# endif
 
 extern long int testandset (int *spinlock);
 extern int __compare_and_swap (long int *p, long int oldval, long int newval);
 
 /* Get some notion of the current stack.  Need not be exactly the top
    of the stack, just something somewhere in the current frame.  */
-#define CURRENT_STACK_FRAME  stack_pointer
+# define CURRENT_STACK_FRAME  stack_pointer
 register char * stack_pointer __asm__ ("%rsp");
 
 
@@ -56,7 +57,7 @@ testandset (int *spinlock)
 
 
 /* Compare-and-swap for semaphores.  */
-#define HAS_COMPARE_AND_SWAP
+# define HAS_COMPARE_AND_SWAP
 
 PT_EI int
 __compare_and_swap (long int *p, long int oldval, long int newval)
@@ -77,7 +78,7 @@ __compare_and_swap (long int *p, long int oldval, long int newval)
    assignments like
 	pthread_descr self = thread_self();
    do not get optimized away.  */
-#define THREAD_SELF \
+# define THREAD_SELF \
 ({									      \
   register pthread_descr __self;					      \
   __asm__ ("movq %%fs:%c1,%0" : "=r" (__self)				      \
@@ -90,14 +91,14 @@ __compare_and_swap (long int *p, long int oldval, long int newval)
 extern int __arch_prctl (int __code, unsigned long __addr);
 
 /* Initialize the thread-unique value.  */
-#define INIT_THREAD_SELF(descr, nr) \
+# define INIT_THREAD_SELF(descr, nr) \
 {									      \
   if (__arch_prctl (ARCH_SET_FS, (unsigned long)descr) != 0)		      \
     abort ();								      \
 }
 
 /* Read member of the thread descriptor directly.  */
-#define THREAD_GETMEM(descr, member) \
+# define THREAD_GETMEM(descr, member) \
 ({									      \
   __typeof__ (descr->member) __value;					      \
   if (sizeof (__value) == 1)						      \
@@ -127,7 +128,7 @@ extern int __arch_prctl (int __code, unsigned long __addr);
 })
 
 /* Same as THREAD_GETMEM, but the member offset can be non-constant.  */
-#define THREAD_GETMEM_NC(descr, member) \
+# define THREAD_GETMEM_NC(descr, member) \
 ({									      \
   __typeof__ (descr->member) __value;					      \
   if (sizeof (__value) == 1)						      \
@@ -157,7 +158,7 @@ extern int __arch_prctl (int __code, unsigned long __addr);
 })
 
 /* Set member of the thread descriptor directly.  */
-#define THREAD_SETMEM(descr, member, value) \
+# define THREAD_SETMEM(descr, member, value) \
 ({									      \
   __typeof__ (descr->member) __value = (value);				      \
   if (sizeof (__value) == 1)						      \
@@ -184,7 +185,7 @@ extern int __arch_prctl (int __code, unsigned long __addr);
 })
 
 /* Same as THREAD_SETMEM, but the member offset can be non-constant.  */
-#define THREAD_SETMEM_NC(descr, member, value) \
+# define THREAD_SETMEM_NC(descr, member, value) \
 ({									      \
   __typeof__ (descr->member) __value = (value);				      \
   if (sizeof (__value) == 1)						      \
@@ -210,6 +211,8 @@ extern int __arch_prctl (int __code, unsigned long __addr);
     }									      \
 })
 
+#endif /* !__ASSEMBLER__ */
+
 /* We want the OS to assign stack addresses.  */
 #define FLOATING_STACKS	1