sysdeps/x86/tst-cet-legacy-2.c

   1 /* Check compatibility of CET-enabled executable with dlopened legacy
   2    shared object.
   3    Copyright (C) 2018-2023 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 #include <dlfcn.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24 extern int in_dso_2 (void);
  25
  26 static int
  27 do_test (void)
  28 {
  29   static const char modname[] = "tst-cet-legacy-mod-1.so";
  30   int (*fp) (void);
  31   void *h;
  32
  33   h = dlopen (modname, RTLD_LAZY);
  34   if (h == NULL)
  35     {
  36       printf ("cannot open '%s': %s\n", modname, dlerror ());
  37       exit (1);
  38     }
  39
  40   fp = dlsym (h, "in_dso_1");
  41   if (fp == NULL)
  42     {
  43       printf ("cannot get symbol 'in_dso': %s\n", dlerror ());
  44       exit (1);
  45     }
  46
  47   if (fp () != 0x1234678)
  48     {
  49       puts ("in_dso_1 () != 0x1234678");
  50       exit (1);
  51     }
  52
  53   if (in_dso_2 () != 0xbadbeef)
  54     {
  55       puts ("in_dso_2 () != 0xbadbeef");
  56       exit (1);
  57     }
  58
  59   dlclose (h);
  60
  61   return 0;
  62 }
  63
  64 #include <support/test-driver.c>