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;------------------------------------------------------------------------------
; X64/CheckCookieMsvc.nasm
;
; Copyright (c) Microsoft Corporation.
; SPDX-License-Identifier: BSD-2-Clause-Patent
;------------------------------------------------------------------------------
DEFAULT REL
SECTION .text
extern ASM_PFX(StackCheckFailure)
extern ASM_PFX(__security_cookie)
extern ASM_PFX(CpuDeadLoop)
; Called when a buffer check fails. This functionality is dependent on MSVC
; C runtime libraries and so is unsupported in UEFI.
global ASM_PFX(__report_rangecheckfailure)
ASM_PFX(__report_rangecheckfailure):
jmp ASM_PFX(CpuDeadLoop)
ret
; The GS handler is for checking the stack cookie during SEH or
; EH exceptions and is unsupported in UEFI.
global ASM_PFX(__GSHandlerCheck)
ASM_PFX(__GSHandlerCheck):
jmp ASM_PFX(CpuDeadLoop)
ret
;------------------------------------------------------------------------------
; Checks the stack cookie value against __security_cookie and calls the
; stack cookie failure handler if there is a mismatch.
;
; VOID
; EFIAPI
; __security_check_cookie (
; IN UINTN CheckValue
; );
;------------------------------------------------------------------------------
global ASM_PFX(__security_check_cookie)
ASM_PFX(__security_check_cookie):
cmp rcx, [ASM_PFX(__security_cookie)]
jne ASM_PFX(StackCheckFailure)
ret
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