/* SPDX-License-Identifier: GPL-2.0 */ /* * GCC stack protector support. * */ #ifndef _ASM_STACKPROTECTOR_H #define _ASM_STACKPROTECTOR_H #include <linux/random.h> #include <linux/version.h> #include <asm/reg.h> #include <asm/current.h> #include <asm/paca.h> /* * Initialize the stackprotector canary value. * * NOTE: this must only be called from functions that never return, * and it must always be inlined. */ static __always_inline void boot_init_stack_canary(void) { unsigned long canary; /* Try to get a semi random initial value. */ canary = get_random_canary(); canary ^= mftb(); canary ^= LINUX_VERSION_CODE; canary &= CANARY_MASK; current->stack_canary = canary; #ifdef [31mCONFIG_PPC64[0m get_paca()->canary = canary; #endif } #endif /* _ASM_STACKPROTECTOR_H */ |