1  /* Multiple versions of strstr.
       2     Copyright (C) 2018-2023 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  #include <ifunc-strstr.h>
      20  
      21  #if HAVE_STRSTR_IFUNC
      22  # define strstr __redirect_strstr
      23  # include <string.h>
      24  # include <ifunc-resolve.h>
      25  # undef strstr
      26  
      27  # if HAVE_STRSTR_C
      28  extern __typeof (__redirect_strstr) STRSTR_C attribute_hidden;
      29  # endif
      30  
      31  # if HAVE_STRSTR_Z13
      32  extern __typeof (__redirect_strstr) STRSTR_Z13 attribute_hidden;
      33  # endif
      34  
      35  # if HAVE_STRSTR_ARCH13
      36  extern __typeof (__redirect_strstr) STRSTR_ARCH13 attribute_hidden;
      37  # endif
      38  
      39  s390_libc_ifunc_expr (__redirect_strstr, strstr,
      40  		      (HAVE_STRSTR_ARCH13 && (hwcap & HWCAP_S390_VXRS_EXT2))
      41  		      ? STRSTR_ARCH13
      42  		      : (HAVE_STRSTR_Z13 && (hwcap & HWCAP_S390_VX))
      43  		      ? STRSTR_Z13
      44  		      : STRSTR_DEFAULT
      45  		      )
      46  #endif