diff options
Diffstat (limited to 'arch/riscv/include/asm/stackprotector.h')
| -rw-r--r-- | arch/riscv/include/asm/stackprotector.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/stackprotector.h b/arch/riscv/include/asm/stackprotector.h new file mode 100644 index 000000000000..43895b90fe3f --- /dev/null +++ b/arch/riscv/include/asm/stackprotector.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _ASM_RISCV_STACKPROTECTOR_H +#define _ASM_RISCV_STACKPROTECTOR_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 = get_random_canary(); + + current->stack_canary = canary; + if (!IS_ENABLED(CONFIG_STACKPROTECTOR_PER_TASK)) + __stack_chk_guard = current->stack_canary; +} +#endif /* _ASM_RISCV_STACKPROTECTOR_H */ |