1 files changed, 98 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sysdep-vdso.h b/sysdeps/unix/sysv/linux/sysdep-vdso.h
new file mode 100644
index 0000000000..43e74b9e7c
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sysdep-vdso.h
@@ -0,0 +1,98 @@
+/* vDSO common definition for Linux.
+   Copyright (C) 2015 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/>.  */
+
+#ifndef SYSDEP_VDSO_LINUX_H
+# define SYSDEP_VDSO_LINUX_H
+
+#define VDSO_SYMBOL(__name) __vdso_##__name
+
+#ifndef INTERNAL_VSYSCALL_CALL
+# define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...)		      \
+     funcptr (args)
+#endif
+
+#ifdef SHARED
+
+# ifdef HAVE_VSYSCALL
+
+#  include <libc-vdso.h>
+
+#  define INLINE_VSYSCALL(name, nr, args...)				      \
+  ({									      \
+    __label__ out;							      \
+    __label__ iserr;							      \
+    INTERNAL_SYSCALL_DECL (sc_err);					      \
+    long int sc_ret;							      \
+									      \
+    __typeof (__vdso_##name) vdsop = __vdso_##name;			      \
+    PTR_DEMANGLE (vdsop);						      \
+    if (vdsop != NULL)							      \
+      {									      \
+	sc_ret = INTERNAL_VSYSCALL_CALL (vdsop, sc_err, nr, ##args);	      \
+	if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err))			      \
+	  goto out;							      \
+	if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS)		      \
+	  goto iserr;							      \
+      }									      \
+									      \
+    sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args);		      \
+    if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err))			      \
+      {									      \
+      iserr:								      \
+        __set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err));		      \
+        sc_ret = -1L;							      \
+      }									      \
+  out:									      \
+    sc_ret;								      \
+  })
+
+#  define INTERNAL_VSYSCALL(name, err, nr, args...)			      \
+  ({									      \
+    __label__ out;							      \
+    long v_ret;								      \
+									      \
+    __typeof (__vdso_##name) vdsop = __vdso_##name;			      \
+    PTR_DEMANGLE (vdsop);						      \
+    if (vdsop != NULL)							      \
+      {									      \
+	v_ret = INTERNAL_VSYSCALL_CALL (vdsop, err, nr, ##args);	      \
+	if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err)			      \
+	    || INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS)		      \
+	  goto out;							      \
+      }									      \
+    v_ret = INTERNAL_SYSCALL (name, err, nr, ##args);			      \
+  out:									      \
+    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 /* HAVE_VSYSCALL  */
+
+# else /* SHARED  */
+
+#  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 /* SHARED  */
+
+#endif /* SYSDEP_VDSO_LINUX_H  */