From 6fca8abef7e6d7be1a9e6d93dd0f2b7fbc5b28e5 Mon Sep 17 00:00:00 2001 From: Pasha Date: Tue, 20 Feb 2024 18:55:36 +0000 Subject: initial risc-v example --- riscv/include/asm/stackprotector.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 riscv/include/asm/stackprotector.h (limited to 'riscv/include/asm/stackprotector.h') diff --git a/riscv/include/asm/stackprotector.h b/riscv/include/asm/stackprotector.h new file mode 100644 index 0000000..43895b9 --- /dev/null +++ b/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 */ -- cgit v1.2.1