1 | ; $Id: ASMWrMsr.asm 92799 2021-12-08 00:47:27Z vboxsync $
|
---|
2 | ;; @file
|
---|
3 | ; IPRT - ASMWrMsr().
|
---|
4 | ;
|
---|
5 |
|
---|
6 | ;
|
---|
7 | ; Copyright (C) 2013-2021 Oracle Corporation
|
---|
8 | ;
|
---|
9 | ; This file is part of VirtualBox Open Source Edition (OSE), as
|
---|
10 | ; available from http://www.virtualbox.org. This file is free software;
|
---|
11 | ; you can redistribute it and/or modify it under the terms of the GNU
|
---|
12 | ; General Public License (GPL) as published by the Free Software
|
---|
13 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
|
---|
14 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
---|
15 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
---|
16 | ;
|
---|
17 | ; The contents of this file may alternatively be used under the terms
|
---|
18 | ; of the Common Development and Distribution License Version 1.0
|
---|
19 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
---|
20 | ; VirtualBox OSE distribution, in which case the provisions of the
|
---|
21 | ; CDDL are applicable instead of those of the GPL.
|
---|
22 | ;
|
---|
23 | ; You may elect to license modified versions of this file under the
|
---|
24 | ; terms and conditions of either the GPL or the CDDL or both.
|
---|
25 | ;
|
---|
26 |
|
---|
27 | ;*******************************************************************************
|
---|
28 | ;* Header Files *
|
---|
29 | ;*******************************************************************************
|
---|
30 | %include "iprt/asmdefs.mac"
|
---|
31 |
|
---|
32 | BEGINCODE
|
---|
33 |
|
---|
34 | ;;
|
---|
35 | ; Special version of ASMRdMsr that allow specifying the rdi value.
|
---|
36 | ;
|
---|
37 | ; @param uMsr msc=rcx, gcc=rdi, x86=[ebp+8] The MSR to read.
|
---|
38 | ; @param uValue msc=rdx, gcc=rsi, x86=[ebp+12] The 64-bit value to write.
|
---|
39 | ;
|
---|
40 | RT_BEGINPROC ASMWrMsr
|
---|
41 | %ifdef ASM_CALL64_MSC
|
---|
42 | mov rdi, rdx
|
---|
43 | mov eax, edx
|
---|
44 | shr rdx, 32
|
---|
45 | wrmsr
|
---|
46 | ret
|
---|
47 |
|
---|
48 | %elifdef ASM_CALL64_GCC
|
---|
49 | mov ecx, edi
|
---|
50 | mov eax, esi
|
---|
51 | mov rdx, rsi
|
---|
52 | shr edx, 32
|
---|
53 | wrmsr
|
---|
54 | ret
|
---|
55 |
|
---|
56 | %elif ARCH_BITS == 32
|
---|
57 | push ebp
|
---|
58 | mov ebp, esp
|
---|
59 | push edi
|
---|
60 | mov ecx, [ebp + 8]
|
---|
61 | mov eax, [ebp + 12]
|
---|
62 | mov edx, [ebp + 16]
|
---|
63 | wrmsr
|
---|
64 | pop edi
|
---|
65 | leave
|
---|
66 | ret
|
---|
67 |
|
---|
68 | %elif ARCH_BITS == 16
|
---|
69 | push bp
|
---|
70 | mov bp, sp
|
---|
71 | push eax
|
---|
72 | push ecx
|
---|
73 | push edx
|
---|
74 |
|
---|
75 | mov ecx, [bp + 04h]
|
---|
76 | mov eax, [bp + 08h]
|
---|
77 | mov edx, [bp + 0ch]
|
---|
78 | wrmsr
|
---|
79 |
|
---|
80 | pop edx
|
---|
81 | pop ecx
|
---|
82 | pop eax
|
---|
83 | leave
|
---|
84 | ret
|
---|
85 | %else
|
---|
86 | %error "Undefined arch?"
|
---|
87 | %endif
|
---|
88 | ENDPROC ASMWrMsr
|
---|
89 |
|
---|