gdb/testsuite/gdb.arch/amd64-shadow-stack.c

/* This testcase is part of GDB, the GNU debugger.

 Copyright 2024-2026 Free Software Foundation, Inc.

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

static int
call2 ()
{
  return 42; /* break call2.  */
}

static int
call1 ()
{
  return call2 (); /* break call1.  */
}

int
main ()
{
  /* Depending on instruction generation we might end up in the call
     instruction of call1 function after "runto_main".  Avoid this by
     adding a nop instruction, to simplify the testing in
     amd64-shadow-stack-disp-step.exp.  */
  asm ("nop");
  call1 (); /* break main.  */
  return 0;
}