diff options
Diffstat (limited to 'plat/arm/board/fvp_r/fvp_r_stack_protector.c')
-rw-r--r-- | plat/arm/board/fvp_r/fvp_r_stack_protector.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/plat/arm/board/fvp_r/fvp_r_stack_protector.c b/plat/arm/board/fvp_r/fvp_r_stack_protector.c new file mode 100644 index 0000000..69b6312 --- /dev/null +++ b/plat/arm/board/fvp_r/fvp_r_stack_protector.c @@ -0,0 +1,24 @@ +/* + * Copyright (c) 2021, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <stdint.h> + +#include <fvp_r_arch_helpers.h> +#include <plat/common/platform.h> + +#define RANDOM_CANARY_VALUE ((u_register_t) 8092347823957523895ULL) + +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. As the + * FVP_R does not have any random number generator, this is better than + * nothing but not necessarily really secure. + */ + return RANDOM_CANARY_VALUE ^ read_cntpct_el0(); +} + |