1 files changed, 39 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/memcpy.c b/sysdeps/x86_64/multiarch/memcpy.c
new file mode 100644
index 0000000000..6a2d3539e2
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/memcpy.c
@@ -0,0 +1,39 @@
+/* Multiple versions of memcpy.
+   All versions must be listed in ifunc-impl-list.c.
+   Copyright (C) 2017 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/>.  */
+
+/* Define multiple versions only for the definition in lib and for
+   DSO.  In static binaries we need memcpy before the initialization
+   happened.  */
+#if defined SHARED && IS_IN (libc)
+# define memcpy __redirect_memcpy
+# include <string.h>
+# undef memcpy
+
+# define SYMBOL_NAME memcpy
+# include "ifunc-memmove.h"
+
+libc_ifunc_redirected (__redirect_memcpy, __new_memcpy,
+		       IFUNC_SELECTOR ());
+
+__hidden_ver1 (__new_memcpy, __GI_memcpy, __redirect_memcpy)
+  __attribute__ ((visibility ("hidden")));
+
+# include <shlib-compat.h>
+versioned_symbol (libc, __new_memcpy, memcpy, GLIBC_2_14);
+#endif