* sysdeps/unix/sysv/linux/s390/bits/libc-vdso.h: New file.

	* sysdeps/unix/sysv/linux/s390/gettimeofday.c: New file.
	* sysdeps/unix/sysv/linux/s390/init-first.c: New file.
	* sysdeps/unix/sysv/linux/s390/Makefile (sysdep_routines): Add dl-vdso
	for elf subdir.
	* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h (INLINE_VSYSCALL,
	INTERNAL_VSYSCALL, INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK,
	INTERNAL_SYSCALL_NCS, HAVE_CLOCK_GETRES_VSYSCALL and
	HAVE_CLOCK_GETTIME_VSYSCALL: Define.
	* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/Versions: New file.

7 files changed, 338 insertions, 2 deletions

diff --git a/sysdeps/unix/sysv/linux/s390/Makefile b/sysdeps/unix/sysv/linux/s390/Makefile
index 5c5381871b..72eae688db 100644
--- a/sysdeps/unix/sysv/linux/s390/Makefile
+++ b/sysdeps/unix/sysv/linux/s390/Makefile
@@ -6,3 +6,7 @@ endif
 ifeq ($(subdir),stdlib)
 gen-as-const-headers += ucontext_i.sym
 endif
+
+ifeq ($(subdir),elf)
+sysdep_routines += dl-vdso
+endif
diff --git a/sysdeps/unix/sysv/linux/s390/Versions b/sysdeps/unix/sysv/linux/s390/Versions
new file mode 100644
index 0000000000..627ff53529
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/s390/Versions
@@ -0,0 +1,6 @@
+libc {
+  GLIBC_PRIVATE {
+    __vdso_clock_gettime;
+    __vdso_clock_getres;
+  }
+}
diff --git a/sysdeps/unix/sysv/linux/s390/bits/libc-vdso.h b/sysdeps/unix/sysv/linux/s390/bits/libc-vdso.h
new file mode 100644
index 0000000000..f289f9a87c
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/s390/bits/libc-vdso.h
@@ -0,0 +1,35 @@
+/* Resolve function pointers to VDSO functions.
+   Copyright (C) 2008 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.  */
+
+
+#ifndef _LIBC_VDSO_H
+#define _LIBC_VDSO_H
+
+#ifdef SHARED
+
+extern long int (*__vdso_gettimeofday) (struct timeval *, void *)
+  attribute_hidden;
+
+extern long int (*__vdso_clock_gettime) (clockid_t, struct timespec *);
+
+extern long int (*__vdso_clock_getres) (clockid_t, struct timespec *);
+
+#endif
+
+#endif /* _LIBC_VDSO_H */
diff --git a/sysdeps/unix/sysv/linux/s390/gettimeofday.c b/sysdeps/unix/sysv/linux/s390/gettimeofday.c
new file mode 100644
index 0000000000..1914c3b6ea
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/s390/gettimeofday.c
@@ -0,0 +1,42 @@
+/* Copyright (C) 2008 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 <sysdep.h>
+#include <bp-checks.h>
+#include <stddef.h>
+#include <sys/time.h>
+#include <time.h>
+#include <hp-timing.h>
+
+#undef __gettimeofday
+#include <bits/libc-vdso.h>
+
+/* Get the current time of day and timezone information,
+   putting it into *TV and *TZ.  If TZ is NULL, *TZ is not filled.
+   Returns 0 on success, -1 on errors.  */
+
+int
+__gettimeofday (tv, tz)
+     struct timeval *tv;
+     struct timezone *tz;
+{
+  return INLINE_VSYSCALL (gettimeofday, 2, CHECK_1 (tv), CHECK_1 (tz));
+}
+
+INTDEF (__gettimeofday)
+weak_alias (__gettimeofday, gettimeofday)
diff --git a/sysdeps/unix/sysv/linux/s390/init-first.c b/sysdeps/unix/sysv/linux/s390/init-first.c
new file mode 100644
index 0000000000..7091aac67d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/s390/init-first.c
@@ -0,0 +1,50 @@
+/* Copyright (C) 2008 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.  */
+
+#ifdef SHARED
+# include <dl-vdso.h>
+# undef __gettimeofday
+# undef __clock_gettime
+# undef __clock_getres
+# include <bits/libc-vdso.h>
+
+long int (*__vdso_gettimeofday) (struct timeval *, void *) attribute_hidden;
+
+long int (*__vdso_clock_gettime) (clockid_t, struct timespec *)
+  __attribute__ ((nocommon));
+strong_alias (__vdso_clock_gettime, __GI___vdso_clock_gettime attribute_hidden)
+
+long int (*__vdso_clock_getres) (clockid_t, struct timespec *)
+  __attribute__ ((nocommon));
+strong_alias (__vdso_clock_getres, __GI___vdso_clock_getres attribute_hidden)
+
+
+static inline void
+_libc_vdso_platform_setup (void)
+{
+  PREPARE_VERSION (linux2629, "LINUX_2.6.29", 123718585);
+
+  __vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2629);
+  __vdso_clock_gettime = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2629);
+  __vdso_clock_getres = _dl_vdso_vsym ("__kernel_clock_getres", &linux2629);
+}
+
+# define VDSO_SETUP _libc_vdso_platform_setup
+#endif
+
+#include "../init-first.c"
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
index b86072bd30..5bfdc44f48 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006
+/* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2008
    Free Software Foundation, Inc.
    Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    This file is part of the GNU C Library.
@@ -26,6 +26,11 @@
 #include <dl-sysdep.h>	/* For RTLD_PRIVATE_ERRNO.  */
 #include <tls.h>
 
+/* Define __set_errno() for INLINE_SYSCALL macro below.  */
+#ifndef __ASSEMBLER__
+#include <errno.h>
+#endif
+
 /* For Linux we can use the system call table in the header file
 	/usr/include/asm/unistd.h
    of the kernel.  But these symbols do not follow the SYS_* syntax
@@ -276,6 +281,100 @@
 #define ASMFMT_5 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6)
 #define ASMFMT_6 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6), "d" (gpr7)
 
+#define CLOBBER_0 , "3", "4", "5"
+#define CLOBBER_1 , "3", "4", "5"
+#define CLOBBER_2 , "4", "5"
+#define CLOBBER_3 , "5"
+#define CLOBBER_4
+#define CLOBBER_5
+#define CLOBBER_6
+
+/* List of system calls which are supported as vsyscalls.  */
+#define HAVE_CLOCK_GETRES_VSYSCALL	1
+#define HAVE_CLOCK_GETTIME_VSYSCALL	1
+
+/* This version is for kernels that implement system calls that
+   behave like function calls as far as register saving.
+   It falls back to the syscall in the case that the vDSO doesn't
+   exist or fails for ENOSYS */
+#ifdef SHARED
+# define INLINE_VSYSCALL(name, nr, args...) \
+  ({									      \
+    __label__ out;							      \
+    __label__ iserr;							      \
+    long int _ret;							      \
+									      \
+    if (__vdso_##name != NULL)						      \
+      {									      \
+	_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, , nr, ##args);	      \
+	if (!INTERNAL_SYSCALL_ERROR_P (_ret, ))				      \
+	  goto out;							      \
+	if (INTERNAL_SYSCALL_ERRNO (_ret, ) != ENOSYS)			      \
+	  goto iserr;							      \
+      }									      \
+									      \
+    _ret = INTERNAL_SYSCALL (name, , nr, ##args);			      \
+    if (INTERNAL_SYSCALL_ERROR_P (_ret, ))				      \
+      {									      \
+      iserr:								      \
+        __set_errno (INTERNAL_SYSCALL_ERRNO (_ret, ));			      \
+        _ret = -1L;							      \
+      }									      \
+  out:									      \
+    (int) _ret;								      \
+  })
+#else
+# define INLINE_VSYSCALL(name, nr, args...) \
+  INLINE_SYSCALL (name, nr, ##args)
+#endif
+
+#ifdef SHARED
+# define INTERNAL_VSYSCALL(name, err, nr, args...) \
+  ({									      \
+    __label__ out;							      \
+    long int _ret;							      \
+									      \
+    if (__vdso_##name != NULL)						      \
+      {									      \
+	_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args);	      \
+	if (!INTERNAL_SYSCALL_ERROR_P (_ret, err)			      \
+	    || INTERNAL_SYSCALL_ERRNO (_ret, err) != ENOSYS)		      \
+	  goto out;							      \
+      }									      \
+    _ret = INTERNAL_SYSCALL (name, err, nr, ##args);			      \
+  out:									      \
+    _ret;								      \
+  })
+#else
+# define INTERNAL_VSYSCALL(name, err, nr, args...) \
+  INTERNAL_SYSCALL (name, err, nr, ##args)
+#endif
+
+/* This version is for internal uses when there is no desire
+   to set errno */
+#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, nr, args...)	      \
+  ({									      \
+    long int _ret = ENOSYS;						      \
+									      \
+    if (__vdso_##name != NULL)						      \
+      _ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args);	      \
+    else								      \
+      err = 1 << 28;							      \
+    _ret;								      \
+  })
+
+#define INTERNAL_VSYSCALL_NCS(fn, err, nr, args...)			      \
+  ({									      \
+    DECLARGS_##nr(args)							      \
+    register long _ret asm("2");						      \
+    asm volatile (							      \
+    "lr 11,14\n\t"							      \
+    "basr 14,%1\n\t"							      \
+    "lr 14,11\n\t"							      \
+    : "=d" (_ret)							      \
+    : "d" (fn) ASMFMT_##nr						      \
+    : "cc", "memory", "0", "1", "11" CLOBBER_##nr);			      \
+    _ret; })
 
 /* Pointer mangling support.  */
 #if defined NOT_IN_libc && defined IS_IN_rtld
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
index 9ddec8e041..6491a3b7b6 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
@@ -1,5 +1,5 @@
 /* Assembler macros for 64 bit S/390.
-   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
+   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2008
    Free Software Foundation, Inc.
    Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    This file is part of the GNU C Library.
@@ -27,6 +27,11 @@
 #include <dl-sysdep.h>	/* For RTLD_PRIVATE_ERRNO.  */
 #include <tls.h>
 
+/* Define __set_errno() for INLINE_SYSCALL macro below.  */
+#ifndef __ASSEMBLER__
+#include <errno.h>
+#endif
+
 /* For Linux we can use the system call table in the header file
 	/usr/include/asm/unistd.h
    of the kernel.  But these symbols do not follow the SYS_* syntax
@@ -278,6 +283,101 @@
 #define ASMFMT_5 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6)
 #define ASMFMT_6 , "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5), "d" (gpr6), "d" (gpr7)
 
+#define CLOBBER_0 , "3", "4", "5"
+#define CLOBBER_1 , "3", "4", "5"
+#define CLOBBER_2 , "4", "5"
+#define CLOBBER_3 , "5"
+#define CLOBBER_4
+#define CLOBBER_5
+#define CLOBBER_6
+
+/* List of system calls which are supported as vsyscalls.  */
+#define HAVE_CLOCK_GETRES_VSYSCALL	1
+#define HAVE_CLOCK_GETTIME_VSYSCALL	1
+
+/* This version is for kernels that implement system calls that
+   behave like function calls as far as register saving.
+   It falls back to the syscall in the case that the vDSO doesn't
+   exist or fails for ENOSYS */
+#ifdef SHARED
+# define INLINE_VSYSCALL(name, nr, args...) \
+  ({									      \
+    __label__ out;							      \
+    __label__ iserr;							      \
+    long int _ret;							      \
+									      \
+    if (__vdso_##name != NULL)						      \
+      {									      \
+	_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, , nr, ##args);	      \
+	if (!INTERNAL_SYSCALL_ERROR_P (_ret, ))				      \
+	  goto out;							      \
+	if (INTERNAL_SYSCALL_ERRNO (_ret, ) != ENOSYS)			      \
+	  goto iserr;							      \
+      }									      \
+									      \
+    _ret = INTERNAL_SYSCALL (name, , nr, ##args);			      \
+    if (INTERNAL_SYSCALL_ERROR_P (_ret, ))				      \
+      {									      \
+      iserr:								      \
+        __set_errno (INTERNAL_SYSCALL_ERRNO (_ret, ));			      \
+        _ret = -1L;							      \
+      }									      \
+  out:									      \
+    (int) _ret;								      \
+  })
+#else
+# define INLINE_VSYSCALL(name, nr, args...) \
+  INLINE_SYSCALL (name, nr, ##args)
+#endif
+
+#ifdef SHARED
+# define INTERNAL_VSYSCALL(name, err, nr, args...) \
+  ({									      \
+    __label__ out;							      \
+    long int _ret;							      \
+									      \
+    if (__vdso_##name != NULL)						      \
+      {									      \
+	_ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args);	      \
+	if (!INTERNAL_SYSCALL_ERROR_P (_ret, err)			      \
+	    || INTERNAL_SYSCALL_ERRNO (_ret, err) != ENOSYS)		      \
+	  goto out;							      \
+      }									      \
+    _ret = INTERNAL_SYSCALL (name, err, nr, ##args);			      \
+  out:									      \
+    _ret;								      \
+  })
+#else
+# define INTERNAL_VSYSCALL(name, err, nr, args...) \
+  INTERNAL_SYSCALL (name, err, nr, ##args)
+#endif
+
+/* This version is for internal uses when there is no desire
+   to set errno */
+#define INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK(name, err, nr, args...)	      \
+  ({									      \
+    long int _ret = ENOSYS;						      \
+									      \
+    if (__vdso_##name != NULL)						      \
+      _ret = INTERNAL_VSYSCALL_NCS (__vdso_##name, err, nr, ##args);	      \
+    else								      \
+      err = 1 << 28;							      \
+    _ret;								      \
+  })
+
+#define INTERNAL_VSYSCALL_NCS(fn, err, nr, args...)			      \
+  ({									      \
+    DECLARGS_##nr(args)							      \
+    register long _ret asm("2");					      \
+    asm volatile (							      \
+    "lgr 11,14\n\t"							      \
+    "basr 14,%1\n\t"							      \
+    "lgr 14,11\n\t"							      \
+    : "=d" (_ret)							      \
+    : "a" (fn) ASMFMT_##nr						      \
+    : "cc", "memory", "0", "1", "11" CLOBBER_##nr);			      \
+    _ret; })
+
 /* Pointer mangling support.  */
 #if defined NOT_IN_libc && defined IS_IN_rtld
 /* We cannot use the thread descriptor because in ld.so we use setjmp