1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 25d920bb9SFilippo Arcidiacono #ifndef __ASM_SH_STACKPROTECTOR_H 35d920bb9SFilippo Arcidiacono #define __ASM_SH_STACKPROTECTOR_H 45d920bb9SFilippo Arcidiacono 55d920bb9SFilippo Arcidiacono extern unsigned long __stack_chk_guard; 65d920bb9SFilippo Arcidiacono 75d920bb9SFilippo Arcidiacono /* 85d920bb9SFilippo Arcidiacono * Initialize the stackprotector canary value. 95d920bb9SFilippo Arcidiacono * 105d920bb9SFilippo Arcidiacono * NOTE: this must only be called from functions that never return, 115d920bb9SFilippo Arcidiacono * and it must always be inlined. 125d920bb9SFilippo Arcidiacono */ boot_init_stack_canary(void)135d920bb9SFilippo Arcidiaconostatic __always_inline void boot_init_stack_canary(void) 145d920bb9SFilippo Arcidiacono { 15*622754e8SJason A. Donenfeld unsigned long canary = get_random_canary(); 165d920bb9SFilippo Arcidiacono 175d920bb9SFilippo Arcidiacono current->stack_canary = canary; 185d920bb9SFilippo Arcidiacono __stack_chk_guard = current->stack_canary; 195d920bb9SFilippo Arcidiacono } 205d920bb9SFilippo Arcidiacono 215d920bb9SFilippo Arcidiacono #endif /* __ASM_SH_STACKPROTECTOR_H */ 22