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Diffstat (limited to '')
-rw-r--r-- | plat/arm/board/juno/juno_stack_protector.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/plat/arm/board/juno/juno_stack_protector.c b/plat/arm/board/juno/juno_stack_protector.c new file mode 100644 index 0000000..3924af8 --- /dev/null +++ b/plat/arm/board/juno/juno_stack_protector.c @@ -0,0 +1,27 @@ +/* + * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch_helpers.h> +#include <common/debug.h> +#include <lib/utils.h> +#include <plat/common/plat_trng.h> +#include <platform_def.h> + +u_register_t plat_get_stack_protector_canary(void) +{ + uint64_t entropy; + + if (!plat_get_entropy(&entropy)) { + ERROR("Not enough entropy to initialize canary value\n"); + panic(); + } + + if (sizeof(entropy) == sizeof(u_register_t)) { + return entropy; + } + + return (entropy & 0xffffffffULL) ^ (entropy >> 32); +} |