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; $Id: ASMSerializeInstruction-iret.asm $
;; @file
; IPRT - ASMSerializeInstruction() using iret.
;
;
; Copyright (C) 2006-2023 Oracle and/or its affiliates.
;
; This file is part of VirtualBox base platform packages, as
; available from https://www.virtualbox.org.
;
; This program is free software; you can redistribute it and/or
; modify it under the terms of the GNU General Public License
; as published by the Free Software Foundation, in version 3 of the
; License.
;
; This program is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
; General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, see <https://www.gnu.org/licenses>.
;
; The contents of this file may alternatively be used under the terms
; of the Common Development and Distribution License Version 1.0
; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
; in the VirtualBox distribution, in which case the provisions of the
; CDDL are applicable instead of those of the GPL.
;
; You may elect to license modified versions of this file under the
; terms and conditions of either the GPL or the CDDL or both.
;
; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
;
;*******************************************************************************
;* Header Files *
;*******************************************************************************
%include "iprt/asmdefs.mac"
BEGINCODE
;;
; Executes a serializing instruction.
;
; The IRET instruction is rather expensive, but unlike the CPUID instruction it
; will not result in a VM EXIT when running in a virtual machine.
;
RT_BEGINPROC ASMSerializeInstructionIRet
pop xAX
%ifdef RT_ARCH_AMD64
mov rdx, xSP
mov ecx, ss
push rcx
push rdx
pushfq
mov ecx, cs
push rcx
push rax
iretq
%elifdef RT_ARCH_X86
pushf
push cs
push xAX
iret
%endif
ENDPROC ASMSerializeInstructionIRet
|
