1  /* Check cookie initialization for many auditors.  Auditor template.
       2     Copyright (C) 2019-2023 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  /* The macro MOD must be defined to the number of this auditor (an
      20     integer) before including this file.  */
      21  
      22  #include <link.h>
      23  #include <stdio.h>
      24  #include <unistd.h>
      25  
      26  /* Error counter for delayed error reporting.  */
      27  static int errors;
      28  
      29  unsigned int
      30  la_version (unsigned int version)
      31  {
      32    return version;
      33  }
      34  
      35  unsigned int
      36  la_objopen (struct link_map *map, Lmid_t lmid,
      37              uintptr_t *cookie)
      38  {
      39    struct link_map *cookie_map = (struct link_map *) *cookie;
      40    printf ("info: %d, la_objopen: map=%p name=%s cookie=%p:%p diff=%td\n",
      41            MOD, map, map->l_name, cookie, cookie_map,
      42            (char *) cookie - (char *) map);
      43    fflush (stdout);
      44    if (map != cookie_map)
      45      {
      46        printf ("error: %d, la_objopen:"
      47                " map address does not match cookie value\n",
      48                MOD);
      49        fflush (stdout);
      50        ++errors;
      51      }
      52    return 0;
      53  }
      54  
      55  extern unsigned int
      56  la_objclose (uintptr_t *__cookie)
      57  {
      58    if (errors != 0)
      59      {
      60        printf ("error: exiting due to previous errors");
      61        _exit (1);
      62      }
      63    return 0;
      64  }