1  /* GLRO(dl_pagesize) initialization DSO test with a static executable.
       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  #include <dlfcn.h>
      20  #include <stddef.h>
      21  #include <stdio.h>
      22  #include <unistd.h>
      23  
      24  /* Check that the same page size is reported both directly and by a DSO
      25     mapped from a static executable.
      26  
      27     On targets that support different page sizes, the kernel communicates
      28     the size currently in use via the auxiliary vector.  The auxiliary
      29     vector and HWCAP/HWCAP2 bits are copied across the static dlopen
      30     boundary in __rtld_static_init.  */
      31  static int
      32  do_test (void)
      33  {
      34    int pagesize = getpagesize ();
      35    int (*my_getpagesize) (void);
      36    int my_pagesize;
      37    void *handle;
      38  
      39    /* Try to map a module.  */
      40    handle = dlopen ("modstatic5.so", RTLD_LAZY | RTLD_LOCAL);
      41    if (handle == NULL)
      42      {
      43        printf ("dlopen (modstatic5.so): %s\n", dlerror ());
      44        return 1;
      45      }
      46  
      47    /* Get at its symbol.  */
      48    my_getpagesize = dlsym (handle, "my_getpagesize");
      49    if (my_getpagesize == NULL)
      50      {
      51        printf ("dlsym (my_getpagesize): %s\n", dlerror ());
      52        return 1;
      53      }
      54  
      55    /* Make sure the page size reported is the same either way.  */
      56    my_pagesize = my_getpagesize ();
      57    if (my_pagesize != pagesize)
      58      {
      59        printf ("my_getpagesize: got %i, expected %i\n", my_pagesize, pagesize);
      60        return 1;
      61      }
      62  
      63    /* All done, clean up.  */
      64    my_getpagesize = NULL;
      65    dlclose (handle);
      66  
      67    return 0;
      68  }
      69  
      70  #define TEST_FUNCTION do_test ()
      71  #include "../test-skeleton.c"