unchanged:
--- a/sysdeps/unix/sysv/linux/x86_64/clock_gettime.c
+++ b/sysdeps/unix/sysv/linux/x86_64/clock_gettime.c
@@ -1,5 +1,6 @@
 #include "bits/libc-vdso.h"
 
+#if 0 /* in Graphene, disallow VDSO calls */
 #ifdef SHARED
 # define SYSCALL_GETTIME(id, tp) \
   ({ long int (*f) (clockid_t, struct timespec *) = __vdso_clock_gettime; \
@@ -16,5 +17,6 @@
   PTR_DEMANGLE (f);							  \
   f (id, tp); })
 #endif
+#endif
 
 #include "../clock_gettime.c"
unchanged:
--- a/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c
+++ b/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c
@@ -17,6 +17,7 @@
 
 #include <sys/time.h>
 
+#if 0 /* In graphene, do not use vsyscall or VDSO call */
 #ifdef SHARED
 
 # include <dl-vdso.h>
@@ -42,7 +43,8 @@ asm (".type __gettimeofday, %gnu_indirect_function");
 asm (".globl __GI___gettimeofday\n"
      "__GI___gettimeofday = __gettimeofday");
 
-#else
+#endif
+#endif
 
 # include <sysdep.h>
 # include <errno.h>
@@ -54,6 +56,5 @@ __gettimeofday (struct timeval *tv, struct timezone *tz)
 }
 libc_hidden_def (__gettimeofday)
 
-#endif
 weak_alias (__gettimeofday, gettimeofday)
 libc_hidden_weak (gettimeofday)
unchanged:
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S	2019-08-13 16:07:35.878486727 -0700
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S	2019-08-13 16:07:56.166508488 -0700
@@ -485,15 +485,8 @@ __pthread_cond_timedwait:
 	/* Only clocks 0 and 1 are allowed so far.  Both are handled in the
 	   kernel.  */
 	leaq	32(%rsp), %rsi
-#  ifdef SHARED
-	mov	__vdso_clock_gettime@GOTPCREL(%rip), %RAX_LP
-	mov	(%rax), %RAX_LP
-	PTR_DEMANGLE (%RAX_LP)
-	call	*%rax
-#  else
 	movl	$__NR_clock_gettime, %eax
 	SYSCALLDB
-#  endif
 
 	/* Compute relative timeout.  */
 	movq	(%r13), %rcx
unchanged:
--- a/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S	2019-08-13 16:02:43.550205689 -0700
+++ b/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S	2019-08-13 16:03:29.282244893 -0700
@@ -30,6 +30,7 @@ ENTRY (sched_getcpu)
 	sub	$0x8, %rsp
 	cfi_adjust_cfa_offset(8)
 
+#if 0 /* for Graphene, never do VDSO calls */
 	movq	%rsp, %rdi
 	xorl	%esi, %esi
 	movl	$VGETCPU_CACHE_OFFSET, %edx
@@ -39,16 +40,19 @@ ENTRY (sched_getcpu)
 	movq	__vdso_getcpu(%rip), %rax
 	PTR_DEMANGLE (%rax)
 	callq	*%rax
-#else
-# ifdef __NR_getcpu
+#endif
+#endif
+
+#ifdef __NR_getcpu
 	movl	$__NR_getcpu, %eax
 	SYSCALLDB
-#  ifndef __ASSUME_GETCPU_SYSCALL
+#endif
+
+#if 0 /* for Graphene, never do vsyscall */
+# ifndef __ASSUME_GETCPU_SYSCALL
 	cmpq	$-ENOSYS, %rax
 	jne	1f
-#  endif
-# endif
-# ifndef __ASSUME_GETCPU_SYSCALL
+
 	movq	$VSYSCALL_ADDR_vgetcpu, %rax
 	callq	*%rax
 1:
unchanged:
--- glibc-2.19-orig/sysdeps/unix/sysv/linux/x86_64/time.c	2014-02-07 01:04:38.000000000 -0800
+++ glibc-2.19-modify/sysdeps/unix/sysv/linux/x86_64/time.c	1969-12-31 16:00:00.000000000 -0800
@@ -1,60 +0,0 @@
-/* Copyright (C) 2001-2014 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, see
-   <http://www.gnu.org/licenses/>.  */
-
-#ifdef SHARED
-/* Redefine time so that the compiler won't complain about the type
-   mismatch with the IFUNC selector in strong_alias, below.  */
-#undef time
-#define time __redirect_time
-#include <time.h>
-
-#include <dl-vdso.h>
-
-#define VSYSCALL_ADDR_vtime	0xffffffffff600400
-
-/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
-   ifunc symbol properly.  */
-extern __typeof (__redirect_time) __libc_time;
-void *time_ifunc (void) __asm__ ("__libc_time");
-
-void *
-time_ifunc (void)
-{
-  PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
-
-  /* If the vDSO is not available we fall back on the old vsyscall.  */
-  return _dl_vdso_vsym ("__vdso_time", &linux26) ?: (void *) VSYSCALL_ADDR_vtime;
-}
-__asm (".type __libc_time, %gnu_indirect_function");
-
-#undef time
-strong_alias (__libc_time, time)
-libc_hidden_ver (__libc_time, time)
-
-#else
-
-# include <time.h>
-# include <sysdep.h>
-
-time_t
-time (time_t *t)
-{
-  INTERNAL_SYSCALL_DECL (err);
-  return INTERNAL_SYSCALL (time, err, 1, t);
-}
-
-#endif
only in patch2:
unchanged:
--- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h
@@ -252,6 +252,7 @@
 # undef INTERNAL_SYSCALL_ERRNO
 # define INTERNAL_SYSCALL_ERRNO(val, err)	(-(val))
 
+# if 0 /* for Graphene, never do vsyscall */
 # ifdef SHARED
 #  define INLINE_VSYSCALL(name, nr, args...) \
   ({									      \
@@ -300,12 +301,13 @@
     v_ret;								      \
   })
 
-# else
-#  define INLINE_VSYSCALL(name, nr, args...) \
-  INLINE_SYSCALL (name, nr, ##args)
-#  define INTERNAL_VSYSCALL(name, err, nr, args...) \
-  INTERNAL_SYSCALL (name, err, nr, ##args)
 # endif
+# endif
+
+#  define INLINE_VSYSCALL(name, nr_args...) \
+  INLINE_SYSCALL (name, ##nr_args)
+#  define INTERNAL_VSYSCALL(name, err, nr_args...) \
+  INTERNAL_SYSCALL (name, err, ##nr_args)
 
 # define LOAD_ARGS_0()
 # define LOAD_REGS_0