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/*
* 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);
}
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