1  /* Multiple versions of memcpy.
       2     Copyright (C) 2013-2023 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 the definition in lib and for
      20     DSO.  In static binaries we need memcpy before the initialization
      21     happened.  */
      22  #if defined SHARED && IS_IN (libc)
      23  # undef memcpy
      24  # define memcpy __redirect_memcpy
      25  # include <string.h>
      26  # include <shlib-compat.h>
      27  # include "init-arch.h"
      28  
      29  extern __typeof (memcpy) __memcpy_ppc attribute_hidden;
      30  extern __typeof (memcpy) __memcpy_cell attribute_hidden;
      31  extern __typeof (memcpy) __memcpy_power6 attribute_hidden;
      32  extern __typeof (memcpy) __memcpy_a2 attribute_hidden;
      33  extern __typeof (memcpy) __memcpy_power7 attribute_hidden;
      34  # undef memcpy
      35  
      36  /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
      37     ifunc symbol properly.  */
      38  libc_ifunc_redirected (__redirect_memcpy, memcpy,
      39  		       (hwcap & PPC_FEATURE_HAS_VSX)
      40  		       ? __memcpy_power7
      41  		       : (hwcap & PPC_FEATURE_ARCH_2_06)
      42  			 ? __memcpy_a2
      43  			 : (hwcap & PPC_FEATURE_ARCH_2_05)
      44  			   ? __memcpy_power6
      45  			   : (hwcap & PPC_FEATURE_CELL_BE)
      46  			     ? __memcpy_cell
      47  			     : __memcpy_ppc);
      48  #endif