1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
; $Id: ASMRdMsrEx.asm $
;; @file
; IPRT - ASMRdMsrEx().
;
;
; Copyright (C) 2013-2022 Oracle and/or its affiliates.
;
; This file is part of VirtualBox base platform packages, as
; available from https://www.virtualbox.org.
;
; This program is free software; you can redistribute it and/or
; modify it under the terms of the GNU General Public License
; as published by the Free Software Foundation, in version 3 of the
; License.
;
; This program is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
; General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, see <https://www.gnu.org/licenses>.
;
; The contents of this file may alternatively be used under the terms
; of the Common Development and Distribution License Version 1.0
; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
; in the VirtualBox distribution, in which case the provisions of the
; CDDL are applicable instead of those of the GPL.
;
; You may elect to license modified versions of this file under the
; terms and conditions of either the GPL or the CDDL or both.
;
; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
;
;*******************************************************************************
;* Header Files *
;*******************************************************************************
%include "iprt/asmdefs.mac"
BEGINCODE
;;
; Special version of ASMRdMsr that allow specifying the rdi value.
;
; @param uMsr msc=rcx, gcc=rdi, x86=[ebp+8] The MSR to read.
; @param uEdi msc=rdx, gcc=rsi, x86=[ebp+12] The EDI/RDI value.
; @returns MSR value in rax on amd64 and edx:eax on x86.
;
RT_BEGINPROC ASMRdMsrEx
%ifdef ASM_CALL64_MSC
proc_frame ASMRdMsrEx_DupWarningHack
push rdi
[pushreg rdi]
[endprolog]
and ecx, ecx ; serious paranoia
mov rdi, rdx
xor eax, eax
xor edx, edx
rdmsr
pop rdi
and eax, eax ; paranoia
shl rdx, 32
or rax, rdx
ret
endproc_frame
%elifdef ASM_CALL64_GCC
mov ecx, edi
mov rdi, rsi
xor eax, eax
xor edx, edx
rdmsr
and eax, eax ; paranoia
shl rdx, 32
or rax, rdx
ret
%elifdef RT_ARCH_X86
push ebp
mov ebp, esp
push edi
xor eax, eax
xor edx, edx
mov ecx, [ebp + 8]
mov edi, [ebp + 12]
rdmsr
pop edi
leave
ret
%else
%error "Undefined arch?"
%endif
ENDPROC ASMRdMsrEx
|
