1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_STACKPROTECTOR_H
 3#define __ASM_SH_STACKPROTECTOR_H
 4
 5#include <linux/random.h>
 6#include <linux/version.h>
 7
 8extern unsigned long __stack_chk_guard;
 9
10/*
11 * Initialize the stackprotector canary value.
12 *
13 * NOTE: this must only be called from functions that never return,
14 * and it must always be inlined.
15 */
16static __always_inline void boot_init_stack_canary(void)
17{
18	unsigned long canary;
19
20	/* Try to get a semi random initial value. */
21	get_random_bytes(&canary, sizeof(canary));
22	canary ^= LINUX_VERSION_CODE;
23	canary &= CANARY_MASK;
24
25	current->stack_canary = canary;
26	__stack_chk_guard = current->stack_canary;
27}
28
29#endif /* __ASM_SH_STACKPROTECTOR_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_STACKPROTECTOR_H
 3#define __ASM_SH_STACKPROTECTOR_H
 4
 
 
 
 5extern unsigned long __stack_chk_guard;
 6
 7/*
 8 * Initialize the stackprotector canary value.
 9 *
10 * NOTE: this must only be called from functions that never return,
11 * and it must always be inlined.
12 */
13static __always_inline void boot_init_stack_canary(void)
14{
15	unsigned long canary = get_random_canary();
 
 
 
 
 
16
17	current->stack_canary = canary;
18	__stack_chk_guard = current->stack_canary;
19}
20
21#endif /* __ASM_SH_STACKPROTECTOR_H */