/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_RISCV_STACKPROTECTOR_H #define _ASM_RISCV_STACKPROTECTOR_H #include <linux/random.h> #include <linux/version.h> extern unsigned long __stack_chk_guard; /* * 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. */ get_random_bytes(&canary, sizeof(canary)); canary ^= LINUX_VERSION_CODE; canary &= CANARY_MASK; current->stack_canary = canary; __stack_chk_guard = current->stack_canary; } #endif /* _ASM_RISCV_STACKPROTECTOR_H */