File glibc-2.15-avoid-vsyscall.patch of Package glibc

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File glibc-2.15-avoid-vsyscall.patch of Package glibc (Revision 5d3b28737c2d39adb5fdc90dfc5df645)

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commit d53a73acdbf6ac6eb99cd06f5dd695da58d9e8f5
Author: Ulrich Drepper <drepper@gmail.com>
Date:   Tue Sep 6 20:22:37 2011 -0400

Avoid gettimeofday vsyscall

2011-09-06  Ulrich Drepper  <drepper@gmail.com>

* sysdeps/unix/sysv/linux/getsysstats.c (__get_nprocs): Don't use
	gettimeofday vsyscall, just use time.

diff --git a/sysdeps/unix/sysv/linux/getsysstats.c b/sysdeps/unix/sysv/linux/getsysstats.c
index b9bae3d..7feb7a1 100644
--- a/sysdeps/unix/sysv/linux/getsysstats.c
+++ b/sysdeps/unix/sysv/linux/getsysstats.c
@@ -37,15 +37,6 @@
 #include <not-cancel.h>
 #include <kernel-features.h>
 
-#ifndef HAVE_CLOCK_GETTIME_VSYSCALL
-# undef INTERNAL_VSYSCALL
-# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
-# undef INLINE_VSYSCALL
-# define INLINE_VSYSCALL INLINE_SYSCALL
-#else
-# include <bits/libc-vdso.h>
-#endif
-
 
 /* How we can determine the number of available processors depends on
    the configuration.  There is currently (as of version 2.0.21) no
@@ -141,17 +132,10 @@ __get_nprocs ()
   static int cached_result;
   static time_t timestamp;
 
-#ifdef __ASSUME_POSIX_TIMERS
-  struct timespec ts;
-  INTERNAL_SYSCALL_DECL (err);
-  INTERNAL_VSYSCALL (clock_gettime, err, 2, CLOCK_REALTIME, &ts);
-#else
-  struct timeval ts;
-  __gettimeofday (&ts, NULL);
-#endif
+  time_t now = time (NULL);
   time_t prev = timestamp;
   atomic_read_barrier ();
-  if (ts.tv_sec == prev)
+  if (now == prev)
     return cached_result;
 
   /* XXX Here will come a test for the new system call.  */
@@ -243,7 +227,7 @@ __get_nprocs ()
  out:
   cached_result = result;
   atomic_write_barrier ();
-  timestamp = ts.tv_sec;
+  timestamp = now;
 
   return result;
 }

commit a77d3c17dc6517636c1cf6ab9c6bb8c257772354
Author: Ulrich Drepper <drepper@gmail.com>
Date:   Tue Sep 6 21:34:11 2011 -0400

Don't unconditionally use clock_gettime vsyscall on x86-64

2011-09-06  Ulrich Drepper  <drepper@gmail.com>

* sysdeps/unix/sysv/linux/x86_64/clock_gettime.c: New file.
	* sysdeps/unix/sysv/linux/clock_gettime.c (SYSCALL_GETTIME): Allow
	already be defined.  Change to take two parameters and don't assign
	result to variable.  Adjust all users.
	Define INTERNAL_GETTIME if not already defined.
	Use INTERNAL_GETTIME instead of INTERNAL_VSYSCALL got clock_gettime
	call.
	* sysdeps/unix/sysv/linux/x86_64/sysdep.h: Don't define
	HAVE_CLOCK_GETTIME_VSYSCALL.
	* sysdeps/unix/clock_gettime.c: Adjust use of SYSDEP_GETTIME_CPU.

diff --git a/sysdeps/unix/clock_gettime.c b/sysdeps/unix/clock_gettime.c
index fbaaf30..d467f2b 100644
--- a/sysdeps/unix/clock_gettime.c
+++ b/sysdeps/unix/clock_gettime.c
@@ -1,5 +1,5 @@
 /* clock_gettime -- Get the current time from a POSIX clockid_t.  Unix version.
-   Copyright (C) 1999-2004, 2005, 2007 Free Software Foundation, Inc.
+   Copyright (C) 1999-2004, 2005, 2007, 2011 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
@@ -113,7 +113,7 @@ clock_gettime (clockid_t clock_id, struct timespec *tp)
 
     default:
 #ifdef SYSDEP_GETTIME_CPU
-      SYSDEP_GETTIME_CPU;
+      retval = SYSDEP_GETTIME_CPU (clock_id, tp);
 #endif
 #if HP_TIMING_AVAIL
       if ((clock_id & ((1 << CLOCK_IDFIELD_SIZE) - 1))
diff --git a/sysdeps/unix/sysv/linux/clock_gettime.c b/sysdeps/unix/sysv/linux/clock_gettime.c
index dd3755c..0ae45de 100644
--- a/sysdeps/unix/sysv/linux/clock_gettime.c
+++ b/sysdeps/unix/sysv/linux/clock_gettime.c
@@ -1,5 +1,5 @@
 /* clock_gettime -- Get current time from a POSIX clockid_t.  Linux version.
-   Copyright (C) 2003,2004,2005,2006,2007,2010 Free Software Foundation, Inc.
+   Copyright (C) 2003,2004,2005,2006,2007,2010,2011 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
@@ -32,9 +32,14 @@
 # include <bits/libc-vdso.h>
 #endif
 
-#define SYSCALL_GETTIME \
-  retval = INLINE_VSYSCALL (clock_gettime, 2, clock_id, tp); \
-  break
+#ifndef SYSCALL_GETTIME
+# define SYSCALL_GETTIME(id, tp) \
+  INLINE_VSYSCALL (clock_gettime, 2, id, tp)
+#endif
+#ifndef INTERNAL_GETTIME
+# define INTERNAL_GETTIME(id, tp) \
+  INTERNAL_VSYSCALL (clock_gettime, err, 2, id, tp)
+#endif
 
 #ifdef __ASSUME_POSIX_TIMERS
 
@@ -44,7 +49,8 @@
   SYSDEP_GETTIME_CPUTIME						      \
   case CLOCK_REALTIME:							      \
   case CLOCK_MONOTONIC:							      \
-    SYSCALL_GETTIME
+    retval = SYSCALL_GETTIME (clock_id, tp);				      \
+    break
 
 # define __libc_missing_posix_timers 0
 #elif defined __NR_clock_gettime
@@ -59,7 +65,7 @@ maybe_syscall_gettime (clockid_t clock_id, struct timespec *tp)
   if (!__libc_missing_posix_timers)
     {
       INTERNAL_SYSCALL_DECL (err);
-      int r = INTERNAL_VSYSCALL (clock_gettime, err, 2, clock_id, tp);
+      int r = INTERNAL_GETTIME (clock_id, tp);
       if (!INTERNAL_SYSCALL_ERROR_P (r, err))
 	return 0;
 
@@ -89,7 +95,7 @@ maybe_syscall_gettime (clockid_t clock_id, struct timespec *tp)
     /* Fallback code.  */						      \
     if (retval == EINVAL && clock_id == CLOCK_REALTIME)			      \
       retval = realtime_gettime (tp);					      \
-    else 								      \
+    else								      \
       {									      \
 	__set_errno (retval);						      \
 	retval = -1;							      \
@@ -119,7 +125,7 @@ maybe_syscall_gettime_cpu (clockid_t clock_id, struct timespec *tp)
   if (!__libc_missing_posix_cpu_timers)
     {
       INTERNAL_SYSCALL_DECL (err);
-      int r = INTERNAL_VSYSCALL (clock_gettime, err, 2, clock_id, tp);
+      int r = INTERNAL_GETTIME (clock_id, tp);
       if (!INTERNAL_SYSCALL_ERROR_P (r, err))
 	return 0;
 
diff --git a/sysdeps/unix/sysv/linux/x86_64/clock_gettime.c b/sysdeps/unix/sysv/linux/x86_64/clock_gettime.c
new file mode 100644
index 0000000..9d6cd23
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/clock_gettime.c
@@ -0,0 +1,10 @@
+#include "bits/libc-vdso.h"
+
+#ifdef SHARED
+# define SYSCALL_GETTIME(id, tp) \
+  (*__vdso_clock_gettime) (id, tp)
+# define INTERNAL_GETTIME(id, tp) \
+  (*__vdso_clock_gettime) (id, tp)
+#endif
+
+#include "../clock_gettime.c"
diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h
index 2b9ea85..a9821dc 100644
--- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001-2005, 2007 Free Software Foundation, Inc.
+/* Copyright (C) 2001-2005, 2007, 2011 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
@@ -279,8 +279,8 @@
     if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err))			      \
       {									      \
       iserr:								      \
-        __set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err));		      \
-        sc_ret = -1L;							      \
+	__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err));		      \
+	sc_ret = -1L;							      \
       }									      \
   out:									      \
     sc_ret;								      \
@@ -304,9 +304,6 @@
     v_ret;								      \
   })
 
-/* List of system calls which are supported as vsyscalls.  */
-#  define HAVE_CLOCK_GETTIME_VSYSCALL	1
-
 # else
 #  define INLINE_VSYSCALL(name, nr, args...) \
   INLINE_SYSCALL (name, nr, ##args)

commit a0e1f41bd487d2202b6c1e0802c0e6c91630fbea
Author: Ulrich Drepper <drepper@gmail.com>
Date:   Tue Sep 6 23:17:53 2011 -0400

Don't call gettimeofday vsyscall in x86-64 sem_timedwait

2011-09-06  Ulrich Drepper  <drepper@gmail.com>

* sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S (sem_timedwait): Don't
	use gettimeofday vsyscall, just call gettimeofday.

diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S
index ca49cb8..2926b36 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002,2003,2005,2007,2009,2010 Free Software Foundation, Inc.
+/* Copyright (C) 2002,2003,2005,2007,2009,2010,2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -24,10 +24,6 @@
 #include <pthread-errnos.h>
 #include <structsem.h>
 
-
-/* For the calculation see asm/vsyscall.h.  */
-#define VSYSCALL_ADDR_vgettimeofday	0xffffffffff600000
-
 	.text
 
 	.globl	sem_timedwait
@@ -212,9 +208,10 @@ sem_timedwait:
 	addq	$1, NWAITERS(%r12)
 
 7:	xorl	%esi, %esi
-	movq	%rsp, %rdi
-	movq	$VSYSCALL_ADDR_vgettimeofday, %rax
-	callq	*%rax
+	movq	%rsp,%rdi
+	/* This call works because we directly jump to a system call entry
+	   which preserves all the registers.  */
+	call	JUMPTARGET(__gettimeofday)
 
 	/* Compute relative timeout.  */
 	movq	8(%rsp), %rax

commit fc8bffcccf5821bca179486abef83a7f82526715
Author: Ulrich Drepper <drepper@gmail.com>
Date:   Tue Sep 6 23:50:04 2011 -0400

Fix handling of __vdso_clock_gettime

2011-09-06  Ulrich Drepper  <drepper@gmail.com>

* sysdeps/unix/sysv/linux/x86_64/clock_gettime.c (INTERNAL_GETTIME):
	Forgot to demangle the pointer.

diff --git a/sysdeps/unix/sysv/linux/x86_64/clock_gettime.c b/sysdeps/unix/sysv/linux/x86_64/clock_gettime.c
index 9d6cd23..7802701 100644
--- a/sysdeps/unix/sysv/linux/x86_64/clock_gettime.c
+++ b/sysdeps/unix/sysv/linux/x86_64/clock_gettime.c
@@ -2,9 +2,13 @@
 
 #ifdef SHARED
 # define SYSCALL_GETTIME(id, tp) \
-  (*__vdso_clock_gettime) (id, tp)
+  ({ long int (*f) (clockid_t, struct timespec *) = __vdso_clock_gettime; \
+  PTR_DEMANGLE (f);							  \
+  f (id, tp); })
 # define INTERNAL_GETTIME(id, tp) \
-  (*__vdso_clock_gettime) (id, tp)
+  ({ long int (*f) (clockid_t, struct timespec *) = __vdso_clock_gettime; \
+  PTR_DEMANGLE (f);							  \
+  f (id, tp); })
 #endif
 
 #include "../clock_gettime.c"

commit 9e5c9dcd57e80cd56c47fd2bf11de8d167176a0e
Author: Ulrich Drepper <drepper@gmail.com>
Date:   Wed Sep 7 00:14:06 2011 -0400

Remove gettimeofday vsyscall use from x86-86 libpthread

* sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S:
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S:
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: Likewise.
	Simplify __vdso_clock_gettime use.
 
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
index 3195db2..018da0c 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2006, 2007, 2009, 2010 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2007, 2009, 2010, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -68,10 +68,6 @@
 #endif
 
 
-/* For the calculation see asm/vsyscall.h.  */
-#define VSYSCALL_ADDR_vgettimeofday	0xffffffffff600000
-
-
 	.globl	__lll_lock_wait_private
 	.type	__lll_lock_wait_private,@function
 	.hidden	__lll_lock_wait_private
@@ -250,10 +246,9 @@ __lll_timedlock_wait:
 	/* Get current time.  */
 	movq	%rsp, %rdi
 	xorl	%esi, %esi
-	movq	$VSYSCALL_ADDR_vgettimeofday, %rax
-	/* This is a regular function call, all caller-save registers
-	   might be clobbered.  */
-	callq	*%rax
+	/* This call works because we directly jump to a system call entry
+	   which preserves all the registers.  */
+	call	JUMPTARGET(__gettimeofday)
 
 	/* Compute relative timeout.  */
 	movq	8(%rsp), %rax
@@ -402,8 +397,9 @@ __lll_timedwait_tid:
 	/* Get current time.  */
 2:	movq	%rsp, %rdi
 	xorl	%esi, %esi
-	movq	$VSYSCALL_ADDR_vgettimeofday, %rax
-	callq	*%rax
+	/* This call works because we directly jump to a system call entry
+	   which preserves all the registers.  */
+	call	JUMPTARGET(__gettimeofday)
 
 	/* Compute relative timeout.  */
 	movq	8(%rsp), %rax
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S
index 5218a4f..b7b8b34 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002=2007, 2009, 2010 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2011=2007, 2009, 2010 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -50,9 +50,6 @@
 	orl	$FUTEX_WAIT_BITSET | FUTEX_CLOCK_REALTIME, reg
 #endif
 
-/* For the calculation see asm/vsyscall.h.  */
-#define VSYSCALL_ADDR_vgettimeofday	0xffffffffff600000
-
 
 	.globl	__lll_robust_lock_wait
 	.type	__lll_robust_lock_wait,@function
@@ -219,10 +216,9 @@ __lll_robust_timedlock_wait:
 	/* Get current time.  */
 	movq	%rsp, %rdi
 	xorl	%esi, %esi
-	movq	$VSYSCALL_ADDR_vgettimeofday, %rax
-	/* This is a regular function call, all caller-save registers
-	   might be clobbered.  */
-	callq	*%rax
+	/* This call works because we directly jump to a system call entry
+	   which preserves all the registers.  */
+	call	JUMPTARGET(__gettimeofday)
 
 	/* Compute relative timeout.  */
 	movq	8(%rsp), %rax
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
index 48ea8b9..d11b297 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
@@ -26,9 +26,6 @@
 
 #include <kernel-features.h>
 
-/* For the calculation see asm/vsyscall.h.  */
-#define VSYSCALL_ADDR_vgettimeofday	0xffffffffff600000
-
 
 	.text
 
@@ -453,13 +450,11 @@ __pthread_cond_timedwait:
 	movq	__vdso_clock_gettime@GOTPCREL(%rip), %rax
 	movq	(%rax), %rax
 	PTR_DEMANGLE (%rax)
-	jz	26f
 	call	*%rax
-	jmp	27f
-#  endif
-26:	movl	$__NR_clock_gettime, %eax
+#  else
+	movl	$__NR_clock_gettime, %eax
 	syscall
-27:
+#  endif
 #  ifndef __ASSUME_POSIX_TIMERS
 	cmpq	$-ENOSYS, %rax
 	je	19f
@@ -473,8 +468,9 @@ __pthread_cond_timedwait:
 # else
 	leaq	24(%rsp), %rdi
 	xorl	%esi, %esi
-	movq	$VSYSCALL_ADDR_vgettimeofday, %rax
-	callq	*%rax
+	/* This call works because we directly jump to a system call entry
+	   which preserves all the registers.  */
+	call	JUMPTARGET(__gettimeofday)
 
 	/* Compute relative timeout.  */
 	movq	40(%rsp), %rax
@@ -611,8 +607,9 @@ __pthread_cond_timedwait:
 	/* clock_gettime not available.  */
 19:	leaq	32(%rsp), %rdi
 	xorl	%esi, %esi
-	movq	$VSYSCALL_ADDR_vgettimeofday, %rax
-	callq	*%rax
+	/* This call works because we directly jump to a system call entry
+	   which preserves all the registers.  */
+	call	JUMPTARGET(__gettimeofday)
 
 	/* Compute relative timeout.  */
 	movq	40(%rsp), %rax
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S
index f5d055c..0e6a6ee 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2005, 2007, 2009, 2010 Free Software Foundation, Inc.
+/* Copyright (C) 2002-2005,2007,2009,2010,2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -23,10 +23,6 @@
 #include <pthread-errnos.h>
 #include <kernel-features.h>
 
-
-/* For the calculation see asm/vsyscall.h.  */
-#define VSYSCALL_ADDR_vgettimeofday	0xffffffffff600000
-
 	.text
 
 	.globl	pthread_rwlock_timedrdlock
@@ -123,8 +119,9 @@ pthread_rwlock_timedrdlock:
 	/* Get current time.  */
 	movq	%rsp, %rdi
 	xorl	%esi, %esi
-	movq	$VSYSCALL_ADDR_vgettimeofday, %rax
-	callq	*%rax
+	/* This call works because we directly jump to a system call entry
+	   which preserves all the registers.  */
+	call	JUMPTARGET(__gettimeofday)
 
 	/* Compute relative timeout.  */
 	movq	8(%rsp), %rax
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S
index 6ed8b49..16bf920 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S
@@ -1,4 +1,5 @@
-/* Copyright (C) 2002, 2003, 2005, 2007, 2009, 2010 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2005, 2007, 2009, 2010, 2011
+   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -23,10 +24,6 @@
 #include <pthread-errnos.h>
 #include <kernel-features.h>
 
-
-/* For the calculation see asm/vsyscall.h.  */
-#define VSYSCALL_ADDR_vgettimeofday	0xffffffffff600000
-
 	.text
 
 	.globl	pthread_rwlock_timedwrlock
@@ -120,8 +117,9 @@ pthread_rwlock_timedwrlock:
 	/* Get current time.  */
 	movq	%rsp, %rdi
 	xorl	%esi, %esi
-	movq	$VSYSCALL_ADDR_vgettimeofday, %rax
-	callq	*%rax
+	/* This call works because we directly jump to a system call entry
+	   which preserves all the registers.  */
+	call	JUMPTARGET(__gettimeofday)
 
 	/* Compute relative timeout.  */
 	movq	8(%rsp), %rax
commit e38ba7ab6a56d53bde4fcff250f6928fb473bc3c
Author: Ulrich Drepper <drepper@gmail.com>
Date:   Wed Sep 7 00:07:08 2011 -0400

Make sure __vdso_clock_gettime always contains a valid pointer

2011-09-07  Ulrich Drepper  <drepper@gmail.com>

* sysdeps/unix/sysv/linux/x86_64/init-first.c
	(_libc_vdso_platform_setup): If vDSO is not present store pointer to
	syscall wrapper around clock_gettime in __vdso_clock_gettime.
	* sysdeps/unix/sysv/linux/x86_64/syscalls.list: Add entry for
	clock_gettime.

diff --git a/sysdeps/unix/sysv/linux/x86_64/init-first.c b/sysdeps/unix/sysv/linux/x86_64/init-first.c
index 25cf08b..cb39aca 100644
--- a/sysdeps/unix/sysv/linux/x86_64/init-first.c
+++ b/sysdeps/unix/sysv/linux/x86_64/init-first.c
@@ -17,6 +17,8 @@
    02111-1307 USA.  */
 
 #ifdef SHARED
+# include <time.h>
+# include <sysdep.h>
 # include <dl-vdso.h>
 # include <bits/libc-vdso.h>
 
@@ -27,12 +29,17 @@ strong_alias (__vdso_clock_gettime, __GI___vdso_clock_gettime attribute_hidden)
 long int (*__vdso_getcpu) (unsigned *, unsigned *, void *) attribute_hidden;
 
 
+extern long int __syscall_clock_gettime (clockid_t, struct timespec *);
+
+
 static inline void
 _libc_vdso_platform_setup (void)
 {
   PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
 
   void *p = _dl_vdso_vsym ("clock_gettime", &linux26);
+  if (p == NULL)
+    p = __syscall_clock_gettime;
   PTR_MANGLE (p);
   __GI___vdso_clock_gettime = p;
 
diff --git a/sysdeps/unix/sysv/linux/x86_64/syscalls.list b/sysdeps/unix/sysv/linux/x86_64/syscalls.list
index 3e231a0..ccddb84 100644
--- a/sysdeps/unix/sysv/linux/x86_64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/x86_64/syscalls.list
@@ -14,6 +14,7 @@ semop		-	semop		i:ipi	__semop		semop
 semtimedop	-	semtimedop	i:ipip	semtimedop
 semget		-	semget		i:iii	__semget	semget
 semctl		-	semctl		i:iiii	__semctl	semctl
+syscall_clock_gettime	EXTRA	clock_gettime	Ei:ip		__syscall_clock_gettime
 
 
 # proper socket implementations:

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File glibc-2.15-avoid-vsyscall.patch of Package glibc (Revision 5d3b28737c2d39adb5fdc90dfc5df645)

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