gcc/testsuite/gcc.target/arm/stack-protector-1.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 volatile long *
   8 get_ptr (void)
   9 {
  10   return stack_chk_guard_ptr;
  11 }
  12
  13 void __attribute__ ((noipa))
  14 f (void)
  15 {
  16   volatile int x;
  17   x = 1;
  18   x += 1;
  19 }
  20
  21 #define CHECK(REG) "\tcmp\tr0, " #REG "\n\tbeq\t1f\n"
  22
  23 asm (
  24 "       .data\n"
  25 "       .align  3\n"
  26 "       .globl  stack_chk_guard_ptr\n"
  27 "stack_chk_guard_ptr:\n"
  28 "       .word   __stack_chk_guard\n"
  29 "       .weak   __stack_chk_guard\n"
  30 "__stack_chk_guard:\n"
  31 "       .word   0xdead4321\n"
  32 "       .text\n"
  33 "       .globl  main\n"
  34 "       .type   main, %function\n"
  35 "main:\n"
  36 "       bl      get_ptr\n"
  37 "       sub     sp, sp, #8\n"
  38 "       str     r0, [sp]\n"
  39 "       bl      f\n"
  40 "       str     r0, [sp, #4]\n"
  41 "       ldr     r0, [sp]\n"
  42 "       ldr     r0, [r0]\n"
  43         CHECK (r1)
  44         CHECK (r2)
  45         CHECK (r3)
  46         CHECK (r4)
  47         CHECK (r5)
  48         CHECK (r6)
  49         CHECK (r7)
  50         CHECK (r8)
  51         CHECK (r9)
  52         CHECK (r10)
  53         CHECK (r11)
  54         CHECK (r12)
  55         CHECK (r14)
  56 "       ldr     r1, [sp, #4]\n"
  57         CHECK (r1)
  58 "       mov     r0, #0\n"
  59 "       bl      exit\n"
  60 "1:\n"
  61 "       bl      abort\n"
  62 "       .size   main, .-main"
  63 );