1  /* Test string/memory functions with size_t in the lower 32 bits of
       2     64-bit register.
       3     Copyright (C) 2019-2023 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     <https://www.gnu.org/licenses/>.  */
      19  
      20  #define TEST_MAIN
      21  #include <string/test-string.h>
      22  
      23  /* On x32, parameter_t may be passed in a 64-bit register with the LEN
      24     field in the lower 32 bits.  When the LEN field of 64-bit register
      25     is passed to string/memory function as the size_t parameter, only
      26     the lower 32 bits can be used.  */
      27  typedef struct
      28  {
      29    union
      30      {
      31        size_t len;
      32        void (*fn) (void);
      33      };
      34    void *p;
      35  } parameter_t;