sysdeps/x86_64/multiarch/memcpy.c

   1 /* Multiple versions of memcpy.
   2    All versions must be listed in ifunc-impl-list.c.
   3    Copyright (C) 2017 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 /* Define multiple versions only for the definition in libc.  */
  21 #if IS_IN (libc)
  22 # define memcpy __redirect_memcpy
  23 # include <string.h>
  24 # undef memcpy
  25
  26 # define SYMBOL_NAME memcpy
  27 # include "ifunc-memmove.h"
  28
  29 libc_ifunc_redirected (__redirect_memcpy, __new_memcpy,
  30                        IFUNC_SELECTOR ());
  31
  32 # ifdef SHARED
  33 __hidden_ver1 (__new_memcpy, __GI_memcpy, __redirect_memcpy)
  34   __attribute__ ((visibility ("hidden")));
  35 # endif
  36
  37 # include <shlib-compat.h>
  38 versioned_symbol (libc, __new_memcpy, memcpy, GLIBC_2_14);
  39 #endif