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