bootsector2-cpu-hidden-regs-1.asm@ 94714

Last change on this file since 94714 was 93115, checked in by vboxsync, 3 years ago
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1	; $Id: bootsector2-cpu-hidden-regs-1.asm 93115 2022-01-01 11:31:46Z vboxsync $
2	;; @file
3	; Bootsector that shows/tests the content of hidden CPU registers.
4	;
5	; Requires VMMDevTesting. Enable it via VBoxManage:
6	; VBoxManage setextradata bs-cpu-hidden-regs-1 VBoxInternal/Devices/VMMDev/0/Config/TestingEnabled 1
7
8	;
9	; Copyright (C) 2007-2022 Oracle Corporation
10	;
11	; This file is part of VirtualBox Open Source Edition (OSE), as
12	; available from http://www.virtualbox.org. This file is free software;
13	; you can redistribute it and/or modify it under the terms of the GNU
14	; General Public License (GPL) as published by the Free Software
15	; Foundation, in version 2 as it comes in the "COPYING" file of the
16	; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
17	; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
18	;
19	; The contents of this file may alternatively be used under the terms
20	; of the Common Development and Distribution License Version 1.0
21	; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
22	; VirtualBox OSE distribution, in which case the provisions of the
23	; CDDL are applicable instead of those of the GPL.
24	;
25	; You may elect to license modified versions of this file under the
26	; terms and conditions of either the GPL or the CDDL or both.
27	;
28
29
30	%include "iprt/asmdefs.mac"
31	%include "iprt/x86.mac"
32	%include "VBox/VMMDevTesting.mac"
33
34	;
35	; Include and execute the init code.
36	;
37	%define BS2_INIT_RM
38	%define BS2_INC_PE16
39	%define BS2_INC_PE32
40	%define BS2_INC_PP32
41	%define BS2_INC_LM64
42	%define BS2_WITH_TRAPS
43	%define BS2_WITH_MANUAL_LTR
44	%include "bootsector2-common-init-code.mac"
45
46
47	;
48	; The benchmark driver
49	;
50	BEGINPROC main
51	;
52	; Test prologue.
53	;
54	mov ax, .s_szTstName
55	call TestInit_r86
56	call Bs2EnableA20_r86
57	call Bs2PanicIfVMMDevTestingIsMissing_r86
58
59	call reportPostBiosValues
60	call rmTests
61	call doTests_rm_pe32
62	call doTests_rm_pp32
63	call doTests_rm_lm64
64
65	;
66	; We're done.
67	;
68	call TestTerm_r86
69	call Bs2Panic
70
71	.s_szTstName:
72	db 'tstCpuHidRegs', 0
73	ENDPROC main
74
75
76	;
77	; Reports the values of interesting hidden registers as we start the test, i.e.
78	; right after the BIOS completed.
79	;
80	BEGINPROC reportPostBiosValues
81	push ax
82	push bx
83	mov ax, .s_szTstInitial
84	call TestSub_r86
85
86	mov ax, .s_szzStart
87	call TestValueRegSZZ_rm
88
89	.done
90	pop bx
91	pop ax
92	ret
93
94	.s_szzStart:
95	db 'BIOS - ldtr:ldtr', 0;
96	db 'BIOS - ldtr_base:ldtr_base', 0;
97	db 'BIOS - ldtr_limit:ldtr_lim', 0;
98	db 'BIOS - ldtr_attr:ldtr_attr', 0;
99	db 'BIOS - tr:tr', 0;
100	db 'BIOS - tr_base:tr_base', 0;
101	db 'BIOS - tr_limit:tr_lim', 0;
102	db 'BIOS - tr_attr:tr_attr', 0;
103	db 'BIOS - cs:cs', 0;
104	db 'BIOS - cs_base:cs_base', 0;
105	db 'BIOS - cs_limit:cs_lim', 0;
106	db 'BIOS - cs_attr:cs_attr', 0;
107	db 'BIOS - ss:ss', 0;
108	db 'BIOS - ss_base:ss_base', 0;
109	db 'BIOS - ss_limit:ss_lim', 0;
110	db 'BIOS - ss_attr:ss_attr', 0;
111	db 'BIOS - ds:ds', 0;
112	db 'BIOS - ds_base:ds_base', 0;
113	db 'BIOS - ds_limit:ds_lim', 0;
114	db 'BIOS - ds_attr:ds_attr', 0;
115	db 0,0,0,0 ; terminator
116	.s_szTstInitial:
117	db 'Post BIOS Values', 0
118	ENDPROC reportPostBiosValues
119
120
121	;
122	; Reports the values of interesting hidden registers as we start the test, i.e.
123	; right after the BIOS completed.
124	;
125	BEGINPROC rmTests
126	push eax
127	push ebx
128	pushfd
129	cli
130
131	mov ax, .s_szTstRM
132	call TestSub_r86
133
134	; Check if CS changes when leaving protected mode.
135	mov ax, .s_szzRMPre
136	call TestValueRegSZZ_rm
137	mov byte [cs:.s_dwDummy], 1
138	call Bs2EnterMode_rm_pe32
139	BITS 32
140	mov eax, .s_szzProt32
141	call TestValueRegSZZ_pe32
142	; mov word [cs:.s_dwDummy], 2 - this shall GP(CS).
143	call Bs2ExitMode_pe32
144	BITS 16
145	mov ax, .s_szzRMPost
146	call TestValueRegSZZ_rm
147	mov dword [cs:.s_dwDummy], 3
148
149	;
150	; What happens if we make CS32 execute-only and return to real-mode.
151	;
152	mov byte [cs:.s_dwDummy], 1
153	call Bs2EnterMode_rm_pe16
154	jmp BS2_SEL_CS16_EO:.loaded_cs16_eo
155	.loaded_cs16_eo:
156	mov eax, .s_szzProtEO
157	call TestValueRegSZZ_pe16
158	; mov ax, word [cs:.s_dwDummy] - this shall GP(CS).
159	; mov word [cs:.s_dwDummy], 2 - this shall GP(CS).
160
161	; Leave real-mode ourselves.
162	mov eax, cr0
163	and eax, ~X86_CR0_PE
164	mov cr0, eax
165
166	; All but cs gets reloaded.
167	xor ax, ax
168	mov ss, ax
169	mov ds, ax
170	mov es, ax
171	mov fs, ax
172	mov gs, ax
173
174	; Display CS and do a test.
175	mov ax, .s_szzRMEO
176	call TestValueRegSZZ_rm
177
178	mov ax, [cs:.s_dwDummy] ; works on intel
179	mov dword [cs:.s_dwDummy], 3 ; ditto
180
181	jmp far 0000:.load_rm_cs
182	.load_rm_cs:
183	; Display CS to check that it remained unchanged.
184	mov ax, .s_szzRMEO2
185	call TestValueRegSZZ_rm
186
187	; Cleanup everything properly.
188	call Bs2EnterMode_rm_pe32
189	BITS 32
190	call Bs2ExitMode_pe32
191	BITS 16
192
193	popfd
194	pop ebx
195	pop eax
196	ret
197
198	.s_dwDummy:
199	dd 0
200	.s_szzRMPre:
201	db 'RM Pre - cs:cs', 0;
202	db 'RM Pre - cs_base:cs_base', 0;
203	db 'RM Pre - cs_limit:cs_lim', 0;
204	db 'RM Pre - cs_attr:cs_attr', 0;
205	db 0,0,0,0 ; terminator
206	.s_szzProt32:
207	db 'Prot32 - cs:cs', 0;
208	db 'Prot32 - cs_base:cs_base', 0;
209	db 'Prot32 - cs_limit:cs_lim', 0;
210	db 'Prot32 - cs_attr:cs_attr', 0;
211	db 0,0,0,0 ; terminator
212	.s_szzRMPost:
213	db 'RM Post - cs:cs', 0;
214	db 'RM Post - cs_base:cs_base', 0;
215	db 'RM Post - cs_limit:cs_lim', 0;
216	db 'RM Post - cs_attr:cs_attr', 0;
217	db 0,0,0,0 ; terminator
218	.s_szzProtEO:
219	db 'Prot 16 EO,L-1,NA - cs:cs', 0;
220	db 'Prot 16 EO,L-1,NA - cs_base:cs_base', 0;
221	db 'Prot 16 EO,L-1,NA - cs_limit:cs_lim', 0;
222	db 'Prot 16 EO,L-1,NA - cs_attr:cs_attr', 0;
223	db 0,0,0,0 ; terminator
224	.s_szzRMEO:
225	db 'RM Post EO,L-1,NA - cs:cs', 0;
226	db 'RM Post EO,L-1,NA - cs_base:cs_base', 0;
227	db 'RM Post EO,L-1,NA - cs_limit:cs_lim', 0;
228	db 'RM Post EO,L-1,NA - cs_attr:cs_attr', 0;
229	db 0,0,0,0 ; terminator
230	.s_szzRMEO2:
231	db 'RM CS(0) EO,L-1 - cs:cs', 0;
232	db 'RM CS(0) EO,L-1 - cs_base:cs_base', 0;
233	db 'RM CS(0) EO,L-1 - cs_limit:cs_lim', 0;
234	db 'RM CS(0) EO,L-1 - cs_attr:cs_attr', 0;
235	db 0,0,0,0 ; terminator
236	.s_szTstRM:
237	db 'Real Mode Test', 0
238	ENDPROC rmTests
239
240
241
242	;
243	; Instantiate the template code.
244	;
245	%include "bootsector2-template-footer.mac" ; reset the initial environemnt.
246
247	%define TMPL_RM
248	%include "bootsector2-cpu-hidden-regs-1-template.mac"
249	;%define TMPL_CMN_V86
250	;%include "bootsector2-cpu-hidden-regs-1-template.mac"
251	%define TMPL_PE16
252	%include "bootsector2-cpu-hidden-regs-1-template.mac"
253	%define TMPL_PE32
254	%include "bootsector2-cpu-hidden-regs-1-template.mac"
255	;%define TMPL_PP16
256	;%include "bootsector2-cpu-hidden-regs-1-template.mac"
257	%define TMPL_PP32
258	%include "bootsector2-cpu-hidden-regs-1-template.mac"
259	;%define TMPL_PAE16
260	;%include "bootsector2-cpu-hidden-regs-1-template.mac"
261	;%define TMPL_PAE32
262	;%include "bootsector2-cpu-hidden-regs-1-template.mac"
263	;%define TMPL_LM16
264	;%include "bootsector2-cpu-hidden-regs-1-template.mac"
265	;%define TMPL_LM32
266	;%include "bootsector2-cpu-hidden-regs-1-template.mac"
267	%define TMPL_LM64
268	%include "bootsector2-cpu-hidden-regs-1-template.mac"
269
270
271	;
272	; End sections and image.
273	;
274	%include "bootsector2-common-end.mac"
275

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source: vbox/trunk/src/VBox/ValidationKit/bootsectors/bootsector2-cpu-hidden-regs-1.asm@ 94714

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