VirtualBox

source: vbox/trunk/src/VBox/ValidationKit/bootsectors/bootsector2-cpu-ac-loop.asm@ 103131

Last change on this file since 103131 was 98103, checked in by vboxsync, 21 months ago

Copyright year updates by scm.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 3.4 KB
Line 
1; $Id: bootsector2-cpu-ac-loop.asm 98103 2023-01-17 14:15:46Z vboxsync $
2;; @file
3; Bootsector test for debug exceptions.
4;
5; Recommended (but not necessary):
6; VBoxManage setextradata bs-cpu-xcpt-2 VBoxInternal/Devices/VMMDev/0/Config/TestingEnabled 1
7;
8
9;
10; Copyright (C) 2007-2023 Oracle and/or its affiliates.
11;
12; This file is part of VirtualBox base platform packages, as
13; available from https://www.virtualbox.org.
14;
15; This program is free software; you can redistribute it and/or
16; modify it under the terms of the GNU General Public License
17; as published by the Free Software Foundation, in version 3 of the
18; License.
19;
20; This program is distributed in the hope that it will be useful, but
21; WITHOUT ANY WARRANTY; without even the implied warranty of
22; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23; General Public License for more details.
24;
25; You should have received a copy of the GNU General Public License
26; along with this program; if not, see <https://www.gnu.org/licenses>.
27;
28; The contents of this file may alternatively be used under the terms
29; of the Common Development and Distribution License Version 1.0
30; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
31; in the VirtualBox distribution, in which case the provisions of the
32; CDDL are applicable instead of those of the GPL.
33;
34; You may elect to license modified versions of this file under the
35; terms and conditions of either the GPL or the CDDL or both.
36;
37; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
38;
39
40
41;*******************************************************************************
42;* Header Files *
43;*******************************************************************************
44%include "iprt/asmdefs.mac"
45%include "iprt/x86.mac"
46%include "VBox/VMMDevTesting.mac"
47
48
49;
50; Include and execute the init code.
51;
52 %define BS2_INIT_PE32
53 %define BS2_WITH_TRAPS
54 %define BS2_WITH_TRAPRECS
55 %define BS2_INC_PE32
56 %define BS2_INC_RM ; for SetCpuModeGlobals_rm
57 %include "bootsector2-common-init-code.mac"
58
59
60;
61; The main() function.
62;
63BEGINPROC main
64 BITS 32
65 ;
66 ; Test prologue.
67 ;
68 mov ax, .s_szTstName
69 call TestInit_p32
70 call Bs2EnableA20_p32
71 cli ; raw-mode hack
72
73 ;
74 ; Execute the tests
75 ;
76 sub esp, 20h
77
78 ; Get the address of the #AC IDT entry.
79 sidt [esp]
80 mov eax, [esp + 2]
81 add eax, 8 * X86_XCPT_AC
82
83 ; Make it execute in ring-3.
84 mov word [eax + 2], BS2_SEL_R3_CS32 ; u16Sel
85 or byte [eax + 5], 3 << 5 ; u2Dpl = 3
86
87 ; Enable AC.
88 mov eax, cr0
89 or eax, X86_CR0_AM
90 mov cr0, eax
91
92 ; Switch to ring-3
93 call Bs2ToRing3_p32
94
95 ; Enable AC.
96 pushfd
97 or dword [esp], X86_EFL_AC
98 popfd
99
100 ;; Test it. - won't work as the handle touches CR2, which traps in ring-3.
101 ;BS2_TRAP_INSTR X86_XCPT_AC, 0, mov dword [esp + 3], 0
102
103 ; Misalign the stack and use it.
104 or esp, 3
105 push esp ; this will loop forever on real intel hardware.
106 and esp, ~3h
107
108 add esp, 20h
109
110 ;
111 ; We're done.
112 ;
113 call TestTerm_p32
114 ret
115
116.s_szTstName:
117 db 'tstCpuAcLoop', 0
118ENDPROC main
119
120
121;
122; End sections and image.
123;
124%include "bootsector2-common-end.mac"
125
Note: See TracBrowser for help on using the repository browser.

© 2024 Oracle Support Privacy / Do Not Sell My Info Terms of Use Trademark Policy Automated Access Etiquette