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 */
31