mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-04-16 09:34:18 +00:00
359acf7746
This patch sets ENABLE_STACK_PROTECTOR=strong and implements the platform support to generate a stack protection canary value. Signed-off-by: Varun Wadekar <vwadekar@nvidia.com> Change-Id: Ia8afe464b5645917b1c77d49305d19c7cd01866a
28 lines
663 B
C
28 lines
663 B
C
/*
|
|
* Copyright (c) 2020, NVIDIA Corporation. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <arch_helpers.h>
|
|
#include <lib/mmio.h>
|
|
#include <plat/common/platform.h>
|
|
#include <platform_def.h>
|
|
|
|
u_register_t plat_get_stack_protector_canary(void)
|
|
{
|
|
u_register_t seed;
|
|
|
|
/*
|
|
* Ideally, a random number should be returned instead. As the
|
|
* platform does not have any random number generator, this is
|
|
* better than nothing, but not really secure.
|
|
*/
|
|
seed = mmio_read_32(TEGRA_MISC_BASE + HARDWARE_REVISION_OFFSET);
|
|
seed <<= 32;
|
|
seed |= mmio_read_32(TEGRA_TMRUS_BASE);
|
|
|
|
return seed ^ read_cntpct_el0();
|
|
}
|