sysdeps/x86/tst-cet-legacy-4.c

   1 /* Check compatibility of CET-enabled executable with dlopened legacy
   2    shared object.
   3    Copyright (C) 2018-2024 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 #include <string.h>
  24 #include <sys/platform/x86.h>
  25
  26 #include <support/check.h>
  27
  28 static int
  29 do_test (void)
  30 {
  31   static const char modname[] = "tst-cet-legacy-mod-4.so";
  32   int (*fp) (void);
  33   void *h;
  34
  35   h = dlopen (modname, RTLD_LAZY);
  36   if (h == NULL)
  37     {
  38       const char *err = dlerror ();
  39       if (!strstr (err, "rebuild shared object with IBT support enabled"))
  40         FAIL_EXIT1 ("incorrect dlopen '%s' error: %s\n", modname, err);
  41       return 0;
  42     }
  43
  44 #ifdef CET_IS_PERMISSIVE
  45   TEST_VERIFY (!CPU_FEATURE_ACTIVE (IBT) && !CPU_FEATURE_ACTIVE (SHSTK));
  46 #endif
  47
  48   fp = dlsym (h, "test");
  49   if (fp == NULL)
  50     FAIL_EXIT1 ("cannot get symbol 'test': %s\n", dlerror ());
  51
  52   if (fp () != 0)
  53     FAIL_EXIT1 ("test () != 0");
  54
  55   dlclose (h);
  56
  57   return 0;
  58 }
  59
  60 #include <support/test-driver.c>