VirtualBox

source: vbox/trunk/src/VBox/VMM/VMMR0/NEMR0NativeA-win.asm@ 92679

Last change on this file since 92679 was 91676, checked in by vboxsync, 3 years ago

VMM/NEM-win: Quick and very dirty hack to make the code work on windows 11. This is _not_ something we want to be doing in the longish run... bugref:10118

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 5.1 KB
Line 
1 ; $Id: NEMR0NativeA-win.asm 91676 2021-10-11 20:46:03Z vboxsync $
2;; @file
3; NEM/win - Ring-0 Assembly Routines.
4;
5
6;
7; Copyright (C) 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
18
19;*******************************************************************************
20;* Header Files *
21;*******************************************************************************
22%define RT_ASM_WITH_SEH64
23%include "iprt/asmdefs.mac"
24
25
26;*********************************************************************************************************************************
27;* External Symbols *
28;*********************************************************************************************************************************
29BEGINDATA
30extern NAME(g_pfnWinHvGetPartitionProperty)
31extern NAME(g_idVidSysFoundPartition)
32extern NAME(g_hVidSysMatchThread)
33extern NAME(g_enmVidSysMatchProperty)
34;extern NAME(g_pfnHvrWinHvGetPartitionPropertyLeadIn)
35
36BEGINCODE
37extern NAME(RTThreadNativeSelf)
38
39
40;;
41; This is a replacement for WinHvGetPartitionProperty that we slot into VID.SYS's
42; import table so we can fish out the partition ID (first parameter).
43;
44BEGINPROC nemR0VidSysWinHvGetPartitionProperty
45;
46; Code is shared with nemR0WinHvrWinHvGetPartitionProperty.
47;
48%macro WinHvGetPartitionPropertyHookBody 0
49 ;
50 ; Create a frame and save all volatile registers.
51 ;
52 push xBP
53 SEH64_PUSH_xBP
54 mov xBP, xSP
55 SEH64_SET_FRAME_xBP 0
56 sub xSP, 0x100+0x20
57 SEH64_ALLOCATE_STACK 0x100+0x20
58 movdqa [rbp - 10h], xmm0
59 movdqa [rbp - 20h], xmm1
60 movdqa [rbp - 30h], xmm2
61 movdqa [rbp - 40h], xmm3
62 movdqa [rbp - 50h], xmm4
63 movdqa [rbp - 60h], xmm5
64 mov [rbp - 70h], rcx
65 mov [rbp - 78h], rdx
66 mov [rbp - 80h], r8
67 mov [rbp - 88h], r9
68 mov [rbp - 90h], r10
69 mov [rbp - 98h], r11
70SEH64_END_PROLOGUE
71
72 ;
73 ; Check if the property matches the one we're querying
74 ;
75 cmp edx, [NAME(g_enmVidSysMatchProperty) wrt rip] ; It is really 32-bit.
76 jne .return
77
78 ;
79 ; Get the current thread and compare that to g_hVidSysTargetThread,
80 ; making sure it's not NULL or NIL.
81 ;
82 call NAME(RTThreadNativeSelf)
83 or rax, rax ; check that it isn't zero.
84 jz .return
85
86 cmp rax, [NAME(g_hVidSysMatchThread) wrt rip]
87 jne .return
88
89 inc rax ; check for ~0.
90 jz .return
91
92 ;
93 ; Got a match, save the partition ID.
94 ;
95 mov rcx, [rbp - 70h]
96 mov [NAME(g_idVidSysFoundPartition) wrt rip], rcx
97
98 ;
99 ; Restore the volatile registers.
100 ;
101.return:
102 movdqa xmm0, [rbp - 10h]
103 movdqa xmm1, [rbp - 20h]
104 movdqa xmm2, [rbp - 30h]
105 movdqa xmm3, [rbp - 40h]
106 movdqa xmm4, [rbp - 50h]
107 movdqa xmm5, [rbp - 60h]
108 mov rcx, [rbp - 70h]
109 mov rdx, [rbp - 78h]
110 mov r8, [rbp - 80h]
111 mov r9, [rbp - 88h]
112 mov r10, [rbp - 90h]
113 mov r11, [rbp - 98h]
114 leave
115%endmacro
116
117 ;
118 ; Identical to nemR0WinHvrWinHvGetPartitionProperty except for the
119 ; resuming of the real code.
120 ;
121 WinHvGetPartitionPropertyHookBody
122
123 ;
124 ; Instead of returning, jump to the real WinHvGetPartitionProperty code.
125 ;
126 mov rax, [NAME(g_pfnWinHvGetPartitionProperty) wrt rip]
127 jmp rax
128ENDPROC nemR0VidSysWinHvGetPartitionProperty
129
130
131section .textrwx code page execute read write
132
133;;
134; This is where we jump to from a WinHvr.sys jmp patch.
135;
136; This is used if the import table patching doesn't work because the indirect
137; call was converted into a direct call by the the retpoline patching code.
138;
139ALIGNCODE(16)
140BEGINPROC nemR0WinHvrWinHvGetPartitionProperty
141
142 ;
143 ; Identical to nemR0VidSysWinHvGetPartitionProperty except for the
144 ; resuming of the real code.
145 ;
146 WinHvGetPartitionPropertyHookBody
147
148 ;
149 ; Now back to the orignal code.
150 ;
151 ; We reserve 64 bytes of space for the lead-in code that we replaced
152 ; from WinHvGetPartitionProperty and additional 12 for the jump back.
153 ;
154GLOBALNAME g_abNemR0WinHvrWinHvGetPartitionProperty_OriginalProlog
155 times 64 int3 ; IMPORTANT! Must be at least as big as the 'Org' variable in the C code.
156 mov rax, 01234567890abcdefh
157 jmp rax
158ENDPROC nemR0WinHvrWinHvGetPartitionProperty
159
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