gcc/testsuite/gcc.target/arm/stack-protector-3.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target fstack_protector } */
   3 /* { dg-options "-fstack-protector-all -O2" } */
   4
   5 extern volatile long *stack_chk_guard_ptr;
   6
   7 void __attribute__ ((noipa))
   8 f (void)
   9 {
  10   volatile int x;
  11   /* Munging the contents of __stack_chk_guard should trigger a
  12      stack-smashing failure for this function.  */
  13   *stack_chk_guard_ptr += 1;
  14 }
  15
  16 asm (
  17 "       .data\n"
  18 "       .align  3\n"
  19 "       .globl  stack_chk_guard_ptr\n"
  20 "stack_chk_guard_ptr:\n"
  21 "       .word   __stack_chk_guard\n"
  22 "       .weak   __stack_chk_guard\n"
  23 "__stack_chk_guard:\n"
  24 "       .word   0xdead4321\n"
  25 "       .text\n"
  26 "       .type   __stack_chk_fail, %function\n"
  27 "__stack_chk_fail:\n"
  28 "       movs    r0, #0\n"
  29 "       bl      exit\n"
  30 "       .size   __stack_chk_fail, .-__stack_chk_fail"
  31 );
  32
  33 int
  34 main (void)
  35 {
  36   f ();
  37   __builtin_abort ();
  38 }