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4c700c1563
Align entire TF-A to use Arm in copyright header. Change-Id: Ief9992169efdab61d0da6bd8c5180de7a4bc2244 Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
34 lines
949 B
ArmAsm
34 lines
949 B
ArmAsm
/*
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* Copyright (c) 2017, Arm Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <arch.h>
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#include <asm_macros.S>
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#include <assert_macros.S>
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.globl update_stack_protector_canary
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/* -----------------------------------------------------------------------
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* void update_stack_protector_canary(void)
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*
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* Change the value of the canary used for stack smashing attacks protection.
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* Note: This must be called when it is safe to call C code, but this cannot be
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* called by C code. Doing this will make the check fail when the calling
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* function returns.
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* -----------------------------------------------------------------------
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*/
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func update_stack_protector_canary
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/* Use r4 as it is callee-saved */
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mov r4, lr
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bl plat_get_stack_protector_canary
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/* Update the canary with the returned value */
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ldr r1, =__stack_chk_guard
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str r0, [r1]
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bx r4
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endfunc update_stack_protector_canary
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