sysdeps/x86/tst-shstk-legacy-1e.c

   1 /* Check that legacy shadow stack code in init_array will trigger
   2    segfault.
   3    Copyright (C) 2023-2024 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 <stdlib.h>
  21 #include <sys/platform/x86.h>
  22 #include <support/test-driver.h>
  23 #include <support/xsignal.h>
  24
  25 /* Check that legacy shadow stack code in init_array will trigger
  26    segfault.  */
  27 extern void legacy (void);
  28 int done;
  29
  30 void
  31 legacy_1 (void)
  32 {
  33   legacy ();
  34   done = 1;
  35 }
  36
  37 void (*init_array []) (void)
  38      __attribute__ ((section (".init_array"), aligned (sizeof (void *)))) =
  39 {
  40   &legacy_1
  41 };
  42
  43 static int
  44 do_test (void)
  45 {
  46   if (!CPU_FEATURE_ACTIVE (SHSTK))
  47     return EXIT_UNSUPPORTED;
  48
  49   return EXIT_FAILURE;
  50 }
  51
  52 #define EXPECTED_SIGNAL (CPU_FEATURE_ACTIVE (SHSTK) ? SIGSEGV : 0)
  53 #include <support/test-driver.c>