arch/powerpc/include/asm/stackprotector.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * GCC stack protector support.
   4  *
   5  */
   6
   7 #ifndef _ASM_STACKPROTECTOR_H
   8 #define _ASM_STACKPROTECTOR_H
   9
  10 #include <asm/reg.h>
  11 #include <asm/current.h>
  12 #include <asm/paca.h>
  13
  14 /*
  15  * Initialize the stackprotector canary value.
  16  *
  17  * NOTE: this must only be called from functions that never return,
  18  * and it must always be inlined.
  19  */
  20 static __always_inline void boot_init_stack_canary(void)
  21 {
  22         unsigned long canary = get_random_canary();
  23
  24         current->stack_canary = canary;
  25 #ifdef CONFIG_PPC64
  26         get_paca()->canary = canary;
  27 #endif
  28 }
  29
  30 #endif  /* _ASM_STACKPROTECTOR_H */