/* SPDX-License-Identifier: GPL-2.0 */
|
#ifndef _ASM_STACKPROTECTOR_H
|
#define _ASM_STACKPROTECTOR_H 1
|
|
#include <linux/random.h>
|
#include <linux/version.h>
|
|
extern unsigned long __stack_chk_guard;
|
|
/*
|
* Initialize the stackprotector canary value.
|
*
|
* NOTE: this must only be called from functions that never return,
|
* and it must always be inlined.
|
*/
|
static __always_inline void boot_init_stack_canary(void)
|
{
|
unsigned long canary;
|
|
/* Try to get a semi random initial value. */
|
get_random_bytes(&canary, sizeof(canary));
|
canary ^= LINUX_VERSION_CODE;
|
canary &= CANARY_MASK;
|
|
current->stack_canary = canary;
|
__stack_chk_guard = current->stack_canary;
|
}
|
|
#endif /* __ASM_SH_STACKPROTECTOR_H */
|
