elf/tst-auditmanymod.h

   1 /* Check cookie initialization for many auditors.  Auditor template.
   2    Copyright (C) 2019-2020 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 }