23 lines
608 B
C
23 lines
608 B
C
/*
|
|
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <arch_helpers.h>
|
|
|
|
#define RANDOM_CANARY_VALUE ((u_register_t) 3288484550995823360ULL)
|
|
|
|
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 does not have any random number generator, this is better than
|
|
* nothing but not necessarily really secure.
|
|
*/
|
|
return RANDOM_CANARY_VALUE ^ read_cntpct_el0();
|
|
}
|