VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/asm/ASMWrMsrEx.asm@ 103795

Last change on this file since 103795 was 98103, checked in by vboxsync, 23 months ago

Copyright year updates by scm.

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1; $Id: ASMWrMsrEx.asm 98103 2023-01-17 14:15:46Z vboxsync $
2;; @file
3; IPRT - ASMWrMsrEx().
4;
5
6;
7; Copyright (C) 2013-2023 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;* Header Files *
39;*******************************************************************************
40%include "iprt/asmdefs.mac"
41
42BEGINCODE
43
44;;
45; Special version of ASMRdMsr that allow specifying the rdi value.
46;
47; @param uMsr msc=rcx, gcc=rdi, x86=[ebp+8] The MSR to read.
48; @param uXDI msc=rdx, gcc=rsi, x86=[ebp+12] The EDI/RDI value.
49; @param uValue msc=r8, gcc=rdx, x86=[ebp+16] The 64-bit value to write.
50;
51RT_BEGINPROC ASMWrMsrEx
52%ifdef ASM_CALL64_MSC
53proc_frame ASMWrMsrEx_DupWarningHack
54 push rdi
55 [pushreg rdi]
56[endprolog]
57 and ecx, ecx ; serious paranoia
58 mov rdi, rdx
59 mov eax, r8d
60 mov rdx, r8
61 shr rdx, 32
62 wrmsr
63 pop rdi
64 ret
65endproc_frame
66%elifdef ASM_CALL64_GCC
67 mov ecx, edi
68 mov rdi, rsi
69 mov eax, edx
70 shr edx, 32
71 wrmsr
72 ret
73%elifdef RT_ARCH_X86
74 push ebp
75 mov ebp, esp
76 push edi
77 mov ecx, [ebp + 8]
78 mov edi, [ebp + 12]
79 mov eax, [ebp + 16]
80 mov edx, [ebp + 20]
81 wrmsr
82 pop edi
83 leave
84 ret
85%else
86 %error "Undefined arch?"
87%endif
88ENDPROC ASMWrMsrEx
89
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