sysdeps/unix/sysv/linux/x86_64/tst-cet-property-2.c

   1 /* Test CET property note parser for [BZ #23467].
   2    Copyright (C) 2018-2024 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 #include <stdlib.h>
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <signal.h>
  23 #include <support/check.h>
  24
  25 extern void bar (void);
  26
  27 void
  28 __attribute__ ((noclone, noinline))
  29 test (void (*func_p) (void))
  30 {
  31   func_p ();
  32 }
  33
  34 /* bar contains an IBT violation if it is called indirectly via a
  35    function pointer.  On IBT machines, it should lead to segfault
  36    unless IBT is disabled by error.  */
  37
  38 static void
  39 sig_handler (int signo)
  40 {
  41   exit (EXIT_SUCCESS);
  42 }
  43
  44 static int
  45 do_test (void)
  46 {
  47   char buf[4];
  48
  49   if (scanf ("%3s", buf) != 1)
  50     FAIL_UNSUPPORTED ("IBT not supported");
  51
  52   if (strcmp (buf, "IBT") != 0)
  53     FAIL_UNSUPPORTED ("IBT not supported");
  54
  55   TEST_VERIFY_EXIT (signal (SIGSEGV, &sig_handler) != SIG_ERR);
  56
  57   /* Call bar via a function pointer to force an IBT violation.  */
  58   test (bar);
  59
  60   return EXIT_FAILURE;
  61 }
  62
  63 #include <support/test-driver.c>