reactos/sdk/lib/gcc_ssp/gcc_ssp.c

   1
   2 #define FAST_FAIL_STACK_COOKIE_CHECK_FAILURE 2
   3
   4 /* Should be random :-/ */
   5 void * __stack_chk_guard = (void*)0xf00df00d;
   6
   7 #if 0
   8 void __stack_chk_guard_setup()
   9 {
  10     unsigned char * p;
  11     p = (unsigned char *)&__stack_chk_guard; // *** Notice that this takes the address of __stack_chk_guard  ***
  12
  13     /* If you have the ability to generate random numbers in your kernel then use them,
  14        otherwise for 32-bit code: */
  15     *p =  0x00000aff; // *** p is &__stack_chk_guard so *p writes to __stack_chk_guard rather than *__stack_chk_guard ***
  16 }
  17 #endif
  18
  19 void __stack_chk_fail()
  20 {
  21     /* Like __fastfail */
  22     __asm__("int $0x29" : : "c"(FAST_FAIL_STACK_COOKIE_CHECK_FAILURE) : "memory");
  23 }