VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/asm/ASMSerializeInstruction-iret.asm@ 96407

Last change on this file since 96407 was 96407, checked in by vboxsync, 2 years ago

scm copyright and license note update

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 2.2 KB
Line 
1; $Id: ASMSerializeInstruction-iret.asm 96407 2022-08-22 17:43:14Z vboxsync $
2;; @file
3; IPRT - ASMSerializeInstruction() using iret.
4;
5
6;
7; Copyright (C) 2006-2022 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
43BEGINCODE
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;
52RT_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
70ENDPROC ASMSerializeInstructionIRet
71
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