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/*
* 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();
}
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