12f78c73fSMao Han /* SPDX-License-Identifier: GPL-2.0 */
22f78c73fSMao Han #ifndef _ASM_STACKPROTECTOR_H
32f78c73fSMao Han #define _ASM_STACKPROTECTOR_H 1
42f78c73fSMao Han 
52f78c73fSMao Han extern unsigned long __stack_chk_guard;
62f78c73fSMao Han 
72f78c73fSMao Han /*
82f78c73fSMao Han  * Initialize the stackprotector canary value.
92f78c73fSMao Han  *
102f78c73fSMao Han  * NOTE: this must only be called from functions that never return,
112f78c73fSMao Han  * and it must always be inlined.
122f78c73fSMao Han  */
boot_init_stack_canary(void)132f78c73fSMao Han static __always_inline void boot_init_stack_canary(void)
142f78c73fSMao Han {
15*622754e8SJason A. Donenfeld 	unsigned long canary = get_random_canary();
162f78c73fSMao Han 
172f78c73fSMao Han 	current->stack_canary = canary;
182f78c73fSMao Han 	__stack_chk_guard = current->stack_canary;
192f78c73fSMao Han }
202f78c73fSMao Han 
212f78c73fSMao Han #endif /* __ASM_SH_STACKPROTECTOR_H */
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