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>