VirtualBox

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

Last change on this file since 103795 was 98103, checked in by vboxsync, 2 years ago

Copyright year updates by scm.

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1; $Id: ASMRdMsrEx.asm 98103 2023-01-17 14:15:46Z vboxsync $
2;; @file
3; IPRT - ASMRdMsrEx().
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 uEdi msc=rdx, gcc=rsi, x86=[ebp+12] The EDI/RDI value.
49; @returns MSR value in rax on amd64 and edx:eax on x86.
50;
51RT_BEGINPROC ASMRdMsrEx
52%ifdef ASM_CALL64_MSC
53proc_frame ASMRdMsrEx_DupWarningHack
54 push rdi
55 [pushreg rdi]
56[endprolog]
57 and ecx, ecx ; serious paranoia
58 mov rdi, rdx
59 xor eax, eax
60 xor edx, edx
61 rdmsr
62 pop rdi
63 and eax, eax ; paranoia
64 shl rdx, 32
65 or rax, rdx
66 ret
67endproc_frame
68%elifdef ASM_CALL64_GCC
69 mov ecx, edi
70 mov rdi, rsi
71 xor eax, eax
72 xor edx, edx
73 rdmsr
74 and eax, eax ; paranoia
75 shl rdx, 32
76 or rax, rdx
77 ret
78%elifdef RT_ARCH_X86
79 push ebp
80 mov ebp, esp
81 push edi
82 xor eax, eax
83 xor edx, edx
84 mov ecx, [ebp + 8]
85 mov edi, [ebp + 12]
86 rdmsr
87 pop edi
88 leave
89 ret
90%else
91 %error "Undefined arch?"
92%endif
93ENDPROC ASMRdMsrEx
94
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