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 */
20static __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 */

 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 <linux/random.h>
11#include <linux/version.h>
12#include <asm/reg.h>
13#include <asm/current.h>
14#include <asm/paca.h>
15
16/*
17 * Initialize the stackprotector canary value.
18 *
19 * NOTE: this must only be called from functions that never return,
20 * and it must always be inlined.
21 */
22static __always_inline void boot_init_stack_canary(void)
23{
24	unsigned long canary;
25
26	/* Try to get a semi random initial value. */
27	canary = get_random_canary();
28	canary ^= mftb();
29	canary ^= LINUX_VERSION_CODE;
30	canary &= CANARY_MASK;
31
32	current->stack_canary = canary;
33#ifdef CONFIG_PPC64
34	get_paca()->canary = canary;
35#endif
36}
37
38#endif	/* _ASM_STACKPROTECTOR_H */