1 | ; $Id: ASMSerializeInstruction-iret.asm 98103 2023-01-17 14:15:46Z vboxsync $
|
---|
2 | ;; @file
|
---|
3 | ; IPRT - ASMSerializeInstruction() using iret.
|
---|
4 | ;
|
---|
5 |
|
---|
6 | ;
|
---|
7 | ; Copyright (C) 2006-2023 Oracle and/or its affiliates.
|
---|
8 | ;
|
---|
9 | ; This file is part of VirtualBox base platform packages, as
|
---|
10 | ; available from https://www.virtualbox.org.
|
---|
11 | ;
|
---|
12 | ; This program is free software; you can redistribute it and/or
|
---|
13 | ; modify it under the terms of the GNU General Public License
|
---|
14 | ; as published by the Free Software Foundation, in version 3 of the
|
---|
15 | ; License.
|
---|
16 | ;
|
---|
17 | ; This program is distributed in the hope that it will be useful, but
|
---|
18 | ; WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
19 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
---|
20 | ; General Public License for more details.
|
---|
21 | ;
|
---|
22 | ; You should have received a copy of the GNU General Public License
|
---|
23 | ; along with this program; if not, see <https://www.gnu.org/licenses>.
|
---|
24 | ;
|
---|
25 | ; The contents of this file may alternatively be used under the terms
|
---|
26 | ; of the Common Development and Distribution License Version 1.0
|
---|
27 | ; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
|
---|
28 | ; in the VirtualBox distribution, in which case the provisions of the
|
---|
29 | ; CDDL are applicable instead of those of the GPL.
|
---|
30 | ;
|
---|
31 | ; You may elect to license modified versions of this file under the
|
---|
32 | ; terms and conditions of either the GPL or the CDDL or both.
|
---|
33 | ;
|
---|
34 | ; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
|
---|
35 | ;
|
---|
36 |
|
---|
37 |
|
---|
38 | ;*******************************************************************************
|
---|
39 | ;* Header Files *
|
---|
40 | ;*******************************************************************************
|
---|
41 | %include "iprt/asmdefs.mac"
|
---|
42 |
|
---|
43 | BEGINCODE
|
---|
44 |
|
---|
45 |
|
---|
46 | ;;
|
---|
47 | ; Executes a serializing instruction.
|
---|
48 | ;
|
---|
49 | ; The IRET instruction is rather expensive, but unlike the CPUID instruction it
|
---|
50 | ; will not result in a VM EXIT when running in a virtual machine.
|
---|
51 | ;
|
---|
52 | RT_BEGINPROC ASMSerializeInstructionIRet
|
---|
53 | pop xAX
|
---|
54 | %ifdef RT_ARCH_AMD64
|
---|
55 | mov rdx, xSP
|
---|
56 | mov ecx, ss
|
---|
57 | push rcx
|
---|
58 | push rdx
|
---|
59 | pushfq
|
---|
60 | mov ecx, cs
|
---|
61 | push rcx
|
---|
62 | push rax
|
---|
63 | iretq
|
---|
64 | %elifdef RT_ARCH_X86
|
---|
65 | pushf
|
---|
66 | push cs
|
---|
67 | push xAX
|
---|
68 | iret
|
---|
69 | %endif
|
---|
70 | ENDPROC ASMSerializeInstructionIRet
|
---|
71 |
|
---|