sysdeps/powerpc/powerpc64/multiarch/strncpy.c

   1 /* Multiple versions of strncpy.
   2    Copyright (C) 2014-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/ >.  */
  18
  19 /* Define multiple versions only for definition in libc. */
  20 #if IS_IN (libc)
  21 # define strncpy __redirect_strncpy
  22 /* Omit the strncpy inline definitions because it would redefine strncpy.  */
  23 # define __NO_STRING_INLINES
  24 # include <string.h>
  25 # include <shlib-compat.h>
  26 # include "init-arch.h"
  27
  28 extern __typeof (strncpy) __strncpy_ppc attribute_hidden;
  29 extern __typeof (strncpy) __strncpy_power7 attribute_hidden;
  30 extern __typeof (strncpy) __strncpy_power8 attribute_hidden;
  31 # undef strncpy
  32
  33 /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
  34  ifunc symbol properly. */
  35 libc_ifunc_redirected (__redirect_strncpy, strncpy,
  36                        (hwcap2 & PPC_FEATURE2_ARCH_2_07)
  37                        ? __strncpy_power8
  38                        : (hwcap & PPC_FEATURE_HAS_VSX)
  39                          ? __strncpy_power7
  40                          : __strncpy_ppc);
  41
  42 #endif