get x86_64 nptl building

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

5 files changed, 307 insertions, 50 deletions

diff --git a/libpthread/nptl/sysdeps/x86_64/Makefile b/libpthread/nptl/sysdeps/x86_64/Makefile
index 6e24a26cd..2f0d88f30 100644
--- a/libpthread/nptl/sysdeps/x86_64/Makefile
+++ b/libpthread/nptl/sysdeps/x86_64/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003 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
@@ -21,8 +21,7 @@ gen-as-const-headers += tcb-offsets.sym
 endif
 
 ifeq ($(subdir),nptl)
-# P4s have problems with 4M aliasing.  We disturb the allocation of stacks
-# just enough so the subsequent allocations do not use stack address
-# (mod 4M) == 0.
-CFLAGS-pthread_create.c += -DMULTI_PAGE_ALIASING=65536
+CFLAGS-pthread_create.c += -mpreferred-stack-boundary=4
+CFLAGS-tst-align.c += -mpreferred-stack-boundary=4
+CFLAGS-tst-align2.c += -mpreferred-stack-boundary=4
 endif
diff --git a/libpthread/nptl/sysdeps/x86_64/Makefile.arch b/libpthread/nptl/sysdeps/x86_64/Makefile.arch
new file mode 100644
index 000000000..b99a0da0e
--- /dev/null
+++ b/libpthread/nptl/sysdeps/x86_64/Makefile.arch
@@ -0,0 +1,52 @@
+# Makefile for uClibc NPTL
+#
+# Copyright (C) 2005 Steven J. Hill <sjhill@uclibc.org>
+#
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+#
+
+libpthread_CSRC = pthread_spin_lock.c
+libpthread_SSRC = pthread_spin_trylock.S
+
+CFLAGS-pthread_spin_lock.c += -D_GNU_SOURCE
+
+CFLAGS-x86_64 = $(SSP_ALL_CFLAGS)
+#CFLAGS:=$(CFLAGS:-O1=-O2)
+
+PTHREAD_ARCH_DIR := $(top_srcdir)libpthread/nptl/sysdeps/x86_64
+PTHREAD_ARCH_OUT := $(top_builddir)libpthread/nptl/sysdeps/x86_64
+PTHREAD_ARCH_OBJ := $(patsubst %.S,$(PTHREAD_ARCH_OUT)/%.o,$(libpthread_SSRC))
+PTHREAD_ARCH_OBJ += $(patsubst %.c,$(PTHREAD_ARCH_OUT)/%.o,$(libpthread_CSRC))
+
+ifeq ($(DOPIC),y)
+libpthread-a-y += $(PTHREAD_ARCH_OBJ:.o=.os)
+else
+libpthread-a-y += $(PTHREAD_ARCH_OBJ)
+endif
+libpthread-so-y += $(PTHREAD_ARCH_OBJ:.o=.oS)
+
+libpthread-nomulti-y += $(PTHREAD_ARCH_OBJ)
+
+objclean-y += nptl_arch_clean
+headers-y += $(PTHREAD_ARCH_OUT)/tcb-offsets.h
+headers_clean-y += nptl_arch_headers_clean
+
+#
+# Create 'tcb-offsets.h' header file.
+#
+CFLAGS-tcb-offsets.c = -S
+
+$(PTHREAD_ARCH_OUT)/tcb-offsets.c: $(PTHREAD_ARCH_DIR)/tcb-offsets.sym
+	$(do_awk) $(top_srcdir)extra/scripts/gen-as-const.awk $< > $@
+
+$(PTHREAD_ARCH_OUT)/tcb-offsets.s: $(PTHREAD_ARCH_OUT)/tcb-offsets.c
+	$(compile.c)
+
+$(PTHREAD_ARCH_OUT)/tcb-offsets.h: $(PTHREAD_ARCH_OUT)/tcb-offsets.s
+	@sed -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*$\/#define \1 \2/p" $< > $@
+
+nptl_arch_headers_clean:
+	$(do_rm) $(addprefix $(PTHREAD_ARCH_OUT)/tcb-offsets., c s h)
+
+nptl_arch_clean:
+	$(do_rm) $(addprefix $(PTHREAD_ARCH_OUT)/*., o os oS)
diff --git a/libpthread/nptl/sysdeps/x86_64/pthreaddef.h b/libpthread/nptl/sysdeps/x86_64/pthreaddef.h
index 27896a445..b33c18638 100644
--- a/libpthread/nptl/sysdeps/x86_64/pthreaddef.h
+++ b/libpthread/nptl/sysdeps/x86_64/pthreaddef.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -33,22 +33,11 @@
 
 /* Location of current stack frame.  The frame pointer is not usable.  */
 #define CURRENT_STACK_FRAME \
-  ({ char *frame; asm ("movq %%rsp, %0" : "=r" (frame)); frame; })
-
-
-/* We prefer to have the stack allocated in the low 4GB since this
-   allows faster context switches.  */
-#define ARCH_MAP_FLAGS MAP_32BIT
-
-/* If it is not possible to allocate memory there retry without that
-   flag.  */
-#define ARCH_RETRY_MMAP(size) \
-  mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC,			      \
-	MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)
+  ({ char *frame; __asm__ ("movq %%rsp, %0" : "=r" (frame)); frame; })
 
 
 /* XXX Until we have a better place keep the definitions here.  */
 
 /* While there is no such syscall.  */
 #define __exit_thread_inline(val) \
-  asm volatile ("syscall" :: "a" (__NR_exit), "D" (val))
+  __asm__ volatile ("syscall" :: "a" (__NR_exit), "D" (val))
diff --git a/libpthread/nptl/sysdeps/x86_64/sysdep.h b/libpthread/nptl/sysdeps/x86_64/sysdep.h
new file mode 100644
index 000000000..122270f91
--- /dev/null
+++ b/libpthread/nptl/sysdeps/x86_64/sysdep.h
@@ -0,0 +1,114 @@
+/* Assembler macros for x86-64.
+   Copyright (C) 2001, 2002, 2003 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <sysdeps/generic/sysdep.h>
+
+#ifdef	__ASSEMBLER__
+
+/* Syntactic details of assembler.  */
+
+#ifdef HAVE_ELF
+
+/* ELF uses byte-counts for .align, most others use log2 of count of bytes.  */
+#define ALIGNARG(log2) 1<<log2
+/* For ELF we need the `.type' directive to make shared libs work right.  */
+#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
+#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
+
+/* In ELF C symbols are asm symbols.  */
+#undef	NO_UNDERSCORES
+#define NO_UNDERSCORES
+
+#else
+
+#define ALIGNARG(log2) log2
+#define ASM_TYPE_DIRECTIVE(name,type)	/* Nothing is specified.  */
+#define ASM_SIZE_DIRECTIVE(name)	/* Nothing is specified.  */
+
+#endif
+
+
+/* Define an entry point visible from C.  */
+#define	ENTRY(name)							      \
+  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name);				      \
+  ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function)			      \
+  .align ALIGNARG(4);							      \
+  C_LABEL(name)								      \
+  cfi_startproc;							      \
+  CALL_MCOUNT
+
+#undef	END
+#define END(name)							      \
+  cfi_endproc;								      \
+  ASM_SIZE_DIRECTIVE(name)
+
+/* If compiled for profiling, call `mcount' at the start of each function.  */
+#ifdef	PROF
+/* The mcount code relies on a normal frame pointer being on the stack
+   to locate our caller, so push one just for its benefit.  */
+#define CALL_MCOUNT                                                          \
+  pushq %rbp;                                                                \
+  cfi_adjust_cfa_offset(8);                                                  \
+  movq %rsp, %rbp;                                                           \
+  cfi_def_cfa_register(%rbp);                                                \
+  call JUMPTARGET(mcount);                                                   \
+  popq %rbp;                                                                 \
+  cfi_def_cfa(rsp,8);
+#else
+#define CALL_MCOUNT		/* Do nothing.  */
+#endif
+
+#ifdef	NO_UNDERSCORES
+/* Since C identifiers are not normally prefixed with an underscore
+   on this system, the asm identifier `syscall_error' intrudes on the
+   C name space.  Make sure we use an innocuous name.  */
+#define	syscall_error	__syscall_error
+#define mcount		_mcount
+#endif
+
+#define	PSEUDO(name, syscall_name, args)				      \
+lose:									      \
+  jmp JUMPTARGET(syscall_error)						      \
+  .globl syscall_error;							      \
+  ENTRY (name)								      \
+  DO_CALL (syscall_name, args);						      \
+  jb lose
+
+#undef	PSEUDO_END
+#define	PSEUDO_END(name)						      \
+  END (name)
+
+#undef JUMPTARGET
+#ifdef PIC
+#define JUMPTARGET(name)	name##@PLT
+#else
+#define JUMPTARGET(name)	name
+#endif
+
+/* Local label name for asm code. */
+#ifndef L
+# ifdef HAVE_ELF
+/* ELF-like local names start with `.L'.  */
+#  define L(name)	.L##name
+# else
+#  define L(name)	name
+# endif
+#endif
+
+#endif	/* __ASSEMBLER__ */
diff --git a/libpthread/nptl/sysdeps/x86_64/tls.h b/libpthread/nptl/sysdeps/x86_64/tls.h
index 516827b8e..7b40e3d57 100644
--- a/libpthread/nptl/sysdeps/x86_64/tls.h
+++ b/libpthread/nptl/sysdeps/x86_64/tls.h
@@ -1,5 +1,5 @@
 /* Definition for thread-local data handling.  nptl/x86_64 version.
-   Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2002-2007, 2008, 2009 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
@@ -20,12 +20,15 @@
 #ifndef _TLS_H
 #define _TLS_H	1
 
-#include <asm/prctl.h>	/* For ARCH_SET_FS.  */
 #ifndef __ASSEMBLER__
+# include <asm/prctl.h>	/* For ARCH_SET_FS.  */
 # include <stdbool.h>
 # include <stddef.h>
 # include <stdint.h>
 # include <stdlib.h>
+# include <sysdep.h>
+# include <bits/wordsize.h>
+# include <xmmintrin.h>
 
 
 /* Type for the dtv.  */
@@ -42,13 +45,33 @@ typedef union dtv
 
 typedef struct
 {
-  void *tcb;		/* Pointer to the TCB.  Not necessary the
+  void *tcb;		/* Pointer to the TCB.  Not necessarily the
 			   thread descriptor used by libpthread.  */
   dtv_t *dtv;
   void *self;		/* Pointer to the thread descriptor.  */
   int multiple_threads;
+  int gscope_flag;
   uintptr_t sysinfo;
   uintptr_t stack_guard;
+  uintptr_t pointer_guard;
+  unsigned long int vgetcpu_cache[2];
+# ifndef __ASSUME_PRIVATE_FUTEX
+  int private_futex;
+# else
+  int __unused1;
+# endif
+# if __WORDSIZE == 64
+  int rtld_must_xmm_save;
+# endif
+  /* Reservation of some values for the TM ABI.  */
+  void *__private_tm[5];
+# if __WORDSIZE == 64
+  long int __unused2;
+  /* Have space for the post-AVX register size.  */
+  __m128 rtld_savespace_sse[8][4];
+
+  void *__padding[8];
+# endif
 } tcbhead_t;
 
 #else /* __ASSEMBLER__ */
@@ -57,9 +80,9 @@ typedef struct
 
 
 /* We require TLS support in the tools.  */
-#ifndef HAVE_TLS_SUPPORT
-# error "TLS support is required."
-#endif
+#define HAVE_TLS_SUPPORT                1
+#define HAVE___THREAD 1
+#define HAVE_TLS_MODEL_ATTRIBUTE 1
 
 /* Signal that TLS support is available.  */
 #define USE_TLS	1
@@ -74,7 +97,7 @@ typedef struct
 
 
 /* Get the thread descriptor definition.  */
-# include <nptl/descr.h>
+# include <descr.h>
 
 #ifndef LOCK_PREFIX
 # ifdef UP
@@ -96,7 +119,12 @@ typedef struct
 # define TLS_TCB_SIZE sizeof (struct pthread)
 
 /* Alignment requirements for the TCB.  */
-# define TLS_TCB_ALIGN __alignof__ (struct pthread)
+//# define TLS_TCB_ALIGN __alignof__ (struct pthread)
+// Normally the above would be correct  But we have to store post-AVX
+// vector registers in the TCB and we want the storage to be aligned.
+// unfortunately there isn't yet a type for these values and hence no
+// 32-byte alignment requirement.  Make this explicit, for now.
+# define TLS_TCB_ALIGN 32
 
 /* The TCB can have any size and the memory following the address the
    thread pointer points to is unspecified.  Allocate the TCB there.  */
@@ -120,9 +148,9 @@ typedef struct
 
 /* Macros to load from and store into segment registers.  */
 # define TLS_GET_FS() \
-  ({ int __seg; __asm ("movl %%fs, %0" : "=q" (__seg)); __seg; })
+  ({ int __seg; __asm__ ("movl %%fs, %0" : "=q" (__seg)); __seg; })
 # define TLS_SET_FS(val) \
-  __asm ("movl %0, %%fs" :: "q" (val))
+  __asm__ ("movl %0, %%fs" :: "q" (val))
 
 
 /* Code to initially initialize the thread pointer.  This might need
@@ -141,7 +169,7 @@ typedef struct
      _head->self = _thrdescr;						      \
 									      \
      /* It is a simple syscall to set the %fs value for the thread.  */	      \
-     asm volatile ("syscall"						      \
+     __asm__ volatile ("syscall"						      \
 		   : "=a" (_result)					      \
 		   : "0" ((unsigned long int) __NR_arch_prctl),		      \
 		     "D" ((unsigned long int) ARCH_SET_FS),		      \
@@ -162,11 +190,11 @@ typedef struct
 
    The contained asm must *not* be marked volatile since otherwise
    assignments like
-        pthread_descr self = thread_self();
+	pthread_descr self = thread_self();
    do not get optimized away.  */
 # define THREAD_SELF \
   ({ struct pthread *__self;						      \
-     asm ("movq %%fs:%c1,%q0" : "=r" (__self)				      \
+     __asm__ ("movq %%fs:%c1,%q0" : "=r" (__self)				      \
 	  : "i" (offsetof (struct pthread, header.self)));	 	      \
      __self;})
 
@@ -178,11 +206,11 @@ typedef struct
 # define THREAD_GETMEM(descr, member) \
   ({ __typeof (descr->member) __value;					      \
      if (sizeof (__value) == 1)						      \
-       asm volatile ("movb %%fs:%P2,%b0"				      \
+       __asm__ volatile ("movb %%fs:%P2,%b0"				      \
 		     : "=q" (__value)					      \
 		     : "0" (0), "i" (offsetof (struct pthread, member)));     \
      else if (sizeof (__value) == 4)					      \
-       asm volatile ("movl %%fs:%P1,%0"					      \
+       __asm__ volatile ("movl %%fs:%P1,%0"					      \
 		     : "=r" (__value)					      \
 		     : "i" (offsetof (struct pthread, member)));	      \
      else								      \
@@ -192,7 +220,7 @@ typedef struct
 	      4 or 8.  */						      \
 	   abort ();							      \
 									      \
-	 asm volatile ("movq %%fs:%P1,%q0"				      \
+	 __asm__ volatile ("movq %%fs:%P1,%q0"				      \
 		       : "=r" (__value)					      \
 		       : "i" (offsetof (struct pthread, member)));	      \
        }								      \
@@ -203,12 +231,12 @@ typedef struct
 # define THREAD_GETMEM_NC(descr, member, idx) \
   ({ __typeof (descr->member[0]) __value;				      \
      if (sizeof (__value) == 1)						      \
-       asm volatile ("movb %%fs:%P2(%q3),%b0"				      \
+       __asm__ volatile ("movb %%fs:%P2(%q3),%b0"				      \
 		     : "=q" (__value)					      \
 		     : "0" (0), "i" (offsetof (struct pthread, member[0])),   \
 		       "r" (idx));					      \
      else if (sizeof (__value) == 4)					      \
-       asm volatile ("movl %%fs:%P1(,%q2,4),%0"				      \
+       __asm__ volatile ("movl %%fs:%P1(,%q2,4),%0"				      \
 		     : "=r" (__value)					      \
 		     : "i" (offsetof (struct pthread, member[0])), "r" (idx));\
      else								      \
@@ -218,7 +246,7 @@ typedef struct
 	      4 or 8.  */						      \
 	   abort ();							      \
 									      \
-	 asm volatile ("movq %%fs:%P1(,%q2,8),%q0"			      \
+	 __asm__ volatile ("movq %%fs:%P1(,%q2,8),%q0"			      \
 		       : "=r" (__value)					      \
 		       : "i" (offsetof (struct pthread, member[0])),	      \
 			 "r" (idx));					      \
@@ -238,11 +266,11 @@ typedef struct
 /* Same as THREAD_SETMEM, but the member offset can be non-constant.  */
 # define THREAD_SETMEM(descr, member, value) \
   ({ if (sizeof (descr->member) == 1)					      \
-       asm volatile ("movb %b0,%%fs:%P1" :				      \
+       __asm__ volatile ("movb %b0,%%fs:%P1" :				      \
 		     : "iq" (value),					      \
 		       "i" (offsetof (struct pthread, member)));	      \
      else if (sizeof (descr->member) == 4)				      \
-       asm volatile ("movl %0,%%fs:%P1" :				      \
+       __asm__ volatile ("movl %0,%%fs:%P1" :				      \
 		     : IMM_MODE (value),				      \
 		       "i" (offsetof (struct pthread, member)));	      \
      else								      \
@@ -252,7 +280,7 @@ typedef struct
 	      4 or 8.  */						      \
 	   abort ();							      \
 									      \
-	 asm volatile ("movq %q0,%%fs:%P1" :				      \
+	 __asm__ volatile ("movq %q0,%%fs:%P1" :				      \
 		       : IMM_MODE ((unsigned long int) value),		      \
 			 "i" (offsetof (struct pthread, member)));	      \
        }})
@@ -261,12 +289,12 @@ typedef struct
 /* Set member of the thread descriptor directly.  */
 # define THREAD_SETMEM_NC(descr, member, idx, value) \
   ({ if (sizeof (descr->member[0]) == 1)				      \
-       asm volatile ("movb %b0,%%fs:%P1(%q2)" :				      \
+       __asm__ volatile ("movb %b0,%%fs:%P1(%q2)" :				      \
 		     : "iq" (value),					      \
 		       "i" (offsetof (struct pthread, member[0])),	      \
 		       "r" (idx));					      \
      else if (sizeof (descr->member[0]) == 4)				      \
-       asm volatile ("movl %0,%%fs:%P1(,%q2,4)" :			      \
+       __asm__ volatile ("movl %0,%%fs:%P1(,%q2,4)" :			      \
 		     : IMM_MODE (value),				      \
 		       "i" (offsetof (struct pthread, member[0])),	      \
 		       "r" (idx));					      \
@@ -277,7 +305,7 @@ typedef struct
 	      4 or 8.  */						      \
 	   abort ();							      \
 									      \
-	 asm volatile ("movq %q0,%%fs:%P1(,%q2,8)" :			      \
+	 __asm__ volatile ("movq %q0,%%fs:%P1(,%q2,8)" :			      \
 		       : IMM_MODE ((unsigned long int) value),		      \
 			 "i" (offsetof (struct pthread, member[0])),	      \
 			 "r" (idx));					      \
@@ -285,11 +313,11 @@ typedef struct
 
 
 /* Atomic compare and exchange on TLS, returning old value.  */
-#define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, newval, oldval) \
+# define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, newval, oldval) \
   ({ __typeof (descr->member) __ret;					      \
      __typeof (oldval) __old = (oldval);				      \
      if (sizeof (descr->member) == 4)					      \
-       asm volatile (LOCK_PREFIX "cmpxchgl %2, %%fs:%P3"		      \
+       __asm__ volatile (LOCK_PREFIX "cmpxchgl %2, %%fs:%P3"		      \
 		     : "=a" (__ret)					      \
 		     : "0" (__old), "r" (newval),			      \
 		       "i" (offsetof (struct pthread, member)));	      \
@@ -299,10 +327,21 @@ typedef struct
      __ret; })
 
 
+/* Atomic logical and.  */
+# define THREAD_ATOMIC_AND(descr, member, val) \
+  (void) ({ if (sizeof ((descr)->member) == 4)				      \
+	      __asm__ volatile (LOCK_PREFIX "andl %1, %%fs:%P0"		      \
+			    :: "i" (offsetof (struct pthread, member)),	      \
+			       "ir" (val));				      \
+	    else							      \
+	      /* Not necessary for other sizes in the moment.  */	      \
+	      abort (); })
+
+
 /* Atomic set bit.  */
-#define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
+# define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
   (void) ({ if (sizeof ((descr)->member) == 4)				      \
-	      asm volatile (LOCK_PREFIX "orl %1, %%fs:%P0"		      \
+	      __asm__ volatile (LOCK_PREFIX "orl %1, %%fs:%P0"		      \
 			    :: "i" (offsetof (struct pthread, member)),	      \
 			       "ir" (1 << (bit)));			      \
 	    else							      \
@@ -310,9 +349,9 @@ typedef struct
 	      abort (); })
 
 
-#define CALL_THREAD_FCT(descr) \
+# define CALL_THREAD_FCT(descr) \
   ({ void *__res;							      \
-     asm volatile ("movq %%fs:%P2, %%rdi\n\t"				      \
+     __asm__ volatile ("movq %%fs:%P2, %%rdi\n\t"				      \
 		   "callq *%%fs:%P1"					      \
 		   : "=a" (__res)					      \
 		   : "i" (offsetof (struct pthread, start_routine)),	      \
@@ -329,6 +368,70 @@ typedef struct
     ((descr)->header.stack_guard					      \
      = THREAD_GETMEM (THREAD_SELF, header.stack_guard))
 
+
+/* Set the pointer guard field in the TCB head.  */
+# define THREAD_SET_POINTER_GUARD(value) \
+  THREAD_SETMEM (THREAD_SELF, header.pointer_guard, value)
+# define THREAD_COPY_POINTER_GUARD(descr) \
+  ((descr)->header.pointer_guard					      \
+   = THREAD_GETMEM (THREAD_SELF, header.pointer_guard))
+
+
+/* Get and set the global scope generation counter in the TCB head.  */
+# 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;							      \
+      __asm__ volatile ("xchgl %0, %%fs:%P1"				      \
+		    : "=r" (__res)					      \
+		    : "i" (offsetof (struct pthread, header.gscope_flag)),    \
+		      "0" (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() \
+  THREAD_SETMEM (THREAD_SELF, header.gscope_flag, THREAD_GSCOPE_FLAG_USED)
+# define THREAD_GSCOPE_WAIT() \
+  GL(dl_wait_lookup_done) ()
+
+
+# ifdef SHARED
+/* Defined in dl-trampoline.S.  */
+extern void _dl_x86_64_save_sse (void);
+extern void _dl_x86_64_restore_sse (void);
+
+# define RTLD_CHECK_FOREIGN_CALL \
+  (THREAD_GETMEM (THREAD_SELF, header.rtld_must_xmm_save) != 0)
+
+/* NB: Don't use the xchg operation because that would imply a lock
+   prefix which is expensive and unnecessary.  The cache line is also
+   not contested at all.  */
+#  define RTLD_ENABLE_FOREIGN_CALL \
+  int old_rtld_must_xmm_save = THREAD_GETMEM (THREAD_SELF,		      \
+					      header.rtld_must_xmm_save);     \
+  THREAD_SETMEM (THREAD_SELF, header.rtld_must_xmm_save, 1)
+
+#  define RTLD_PREPARE_FOREIGN_CALL \
+  do if (THREAD_GETMEM (THREAD_SELF, header.rtld_must_xmm_save))	      \
+    {									      \
+      _dl_x86_64_save_sse ();						      \
+      THREAD_SETMEM (THREAD_SELF, header.rtld_must_xmm_save, 0);	      \
+    }									      \
+  while (0)
+
+#  define RTLD_FINALIZE_FOREIGN_CALL \
+  do {									      \
+    if (THREAD_GETMEM (THREAD_SELF, header.rtld_must_xmm_save) == 0)	      \
+      _dl_x86_64_restore_sse ();					      \
+    THREAD_SETMEM (THREAD_SELF, header.rtld_must_xmm_save,		      \
+		   old_rtld_must_xmm_save);				      \
+  } while (0)
+# endif
+
+
 #endif /* __ASSEMBLER__ */
 
 #endif	/* tls.h */