diff options
Diffstat (limited to 'plat/st/stm32mp1/stm32mp1_stack_protector.c')
-rw-r--r-- | plat/st/stm32mp1/stm32mp1_stack_protector.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/plat/st/stm32mp1/stm32mp1_stack_protector.c b/plat/st/stm32mp1/stm32mp1_stack_protector.c new file mode 100644 index 0000000..14e8e16 --- /dev/null +++ b/plat/st/stm32mp1/stm32mp1_stack_protector.c @@ -0,0 +1,22 @@ +/* + * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <stdint.h> + +#include <arch_helpers.h> +#include <plat/common/platform.h> + +#define RANDOM_CANARY_VALUE 2144346116U + +u_register_t plat_get_stack_protector_canary(void) +{ + /* + * Ideally, a random number should be returned instead of the + * combination of a timer's value and a compile-time constant. + */ + return RANDOM_CANARY_VALUE ^ (u_register_t)read_cntpct_el0(); +} + |