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|
; $Id: bootsector2-cpu-hidden-regs-1.asm $
;; @file
; Bootsector that shows/tests the content of hidden CPU registers.
;
; Requires VMMDevTesting. Enable it via VBoxManage:
; VBoxManage setextradata bs-cpu-hidden-regs-1 VBoxInternal/Devices/VMMDev/0/Config/TestingEnabled 1
;
; Copyright (C) 2007-2022 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
;
%include "iprt/asmdefs.mac"
%include "iprt/x86.mac"
%include "VBox/VMMDevTesting.mac"
;
; Include and execute the init code.
;
%define BS2_INIT_RM
%define BS2_INC_PE16
%define BS2_INC_PE32
%define BS2_INC_PP32
%define BS2_INC_LM64
%define BS2_WITH_TRAPS
%define BS2_WITH_MANUAL_LTR
%include "bootsector2-common-init-code.mac"
;
; The benchmark driver
;
BEGINPROC main
;
; Test prologue.
;
mov ax, .s_szTstName
call TestInit_r86
call Bs2EnableA20_r86
call Bs2PanicIfVMMDevTestingIsMissing_r86
call reportPostBiosValues
call rmTests
call doTests_rm_pe32
call doTests_rm_pp32
call doTests_rm_lm64
;
; We're done.
;
call TestTerm_r86
call Bs2Panic
.s_szTstName:
db 'tstCpuHidRegs', 0
ENDPROC main
;
; Reports the values of interesting hidden registers as we start the test, i.e.
; right after the BIOS completed.
;
BEGINPROC reportPostBiosValues
push ax
push bx
mov ax, .s_szTstInitial
call TestSub_r86
mov ax, .s_szzStart
call TestValueRegSZZ_rm
.done
pop bx
pop ax
ret
.s_szzStart:
db 'BIOS - ldtr:ldtr', 0;
db 'BIOS - ldtr_base:ldtr_base', 0;
db 'BIOS - ldtr_limit:ldtr_lim', 0;
db 'BIOS - ldtr_attr:ldtr_attr', 0;
db 'BIOS - tr:tr', 0;
db 'BIOS - tr_base:tr_base', 0;
db 'BIOS - tr_limit:tr_lim', 0;
db 'BIOS - tr_attr:tr_attr', 0;
db 'BIOS - cs:cs', 0;
db 'BIOS - cs_base:cs_base', 0;
db 'BIOS - cs_limit:cs_lim', 0;
db 'BIOS - cs_attr:cs_attr', 0;
db 'BIOS - ss:ss', 0;
db 'BIOS - ss_base:ss_base', 0;
db 'BIOS - ss_limit:ss_lim', 0;
db 'BIOS - ss_attr:ss_attr', 0;
db 'BIOS - ds:ds', 0;
db 'BIOS - ds_base:ds_base', 0;
db 'BIOS - ds_limit:ds_lim', 0;
db 'BIOS - ds_attr:ds_attr', 0;
db 0,0,0,0 ; terminator
.s_szTstInitial:
db 'Post BIOS Values', 0
ENDPROC reportPostBiosValues
;
; Reports the values of interesting hidden registers as we start the test, i.e.
; right after the BIOS completed.
;
BEGINPROC rmTests
push eax
push ebx
pushfd
cli
mov ax, .s_szTstRM
call TestSub_r86
; Check if CS changes when leaving protected mode.
mov ax, .s_szzRMPre
call TestValueRegSZZ_rm
mov byte [cs:.s_dwDummy], 1
call Bs2EnterMode_rm_pe32
BITS 32
mov eax, .s_szzProt32
call TestValueRegSZZ_pe32
; mov word [cs:.s_dwDummy], 2 - this shall GP(CS).
call Bs2ExitMode_pe32
BITS 16
mov ax, .s_szzRMPost
call TestValueRegSZZ_rm
mov dword [cs:.s_dwDummy], 3
;
; What happens if we make CS32 execute-only and return to real-mode.
;
mov byte [cs:.s_dwDummy], 1
call Bs2EnterMode_rm_pe16
jmp BS2_SEL_CS16_EO:.loaded_cs16_eo
.loaded_cs16_eo:
mov eax, .s_szzProtEO
call TestValueRegSZZ_pe16
; mov ax, word [cs:.s_dwDummy] - this shall GP(CS).
; mov word [cs:.s_dwDummy], 2 - this shall GP(CS).
; Leave real-mode ourselves.
mov eax, cr0
and eax, ~X86_CR0_PE
mov cr0, eax
; All but cs gets reloaded.
xor ax, ax
mov ss, ax
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
; Display CS and do a test.
mov ax, .s_szzRMEO
call TestValueRegSZZ_rm
mov ax, [cs:.s_dwDummy] ; works on intel
mov dword [cs:.s_dwDummy], 3 ; ditto
jmp far 0000:.load_rm_cs
.load_rm_cs:
; Display CS to check that it remained unchanged.
mov ax, .s_szzRMEO2
call TestValueRegSZZ_rm
; Cleanup everything properly.
call Bs2EnterMode_rm_pe32
BITS 32
call Bs2ExitMode_pe32
BITS 16
popfd
pop ebx
pop eax
ret
.s_dwDummy:
dd 0
.s_szzRMPre:
db 'RM Pre - cs:cs', 0;
db 'RM Pre - cs_base:cs_base', 0;
db 'RM Pre - cs_limit:cs_lim', 0;
db 'RM Pre - cs_attr:cs_attr', 0;
db 0,0,0,0 ; terminator
.s_szzProt32:
db 'Prot32 - cs:cs', 0;
db 'Prot32 - cs_base:cs_base', 0;
db 'Prot32 - cs_limit:cs_lim', 0;
db 'Prot32 - cs_attr:cs_attr', 0;
db 0,0,0,0 ; terminator
.s_szzRMPost:
db 'RM Post - cs:cs', 0;
db 'RM Post - cs_base:cs_base', 0;
db 'RM Post - cs_limit:cs_lim', 0;
db 'RM Post - cs_attr:cs_attr', 0;
db 0,0,0,0 ; terminator
.s_szzProtEO:
db 'Prot 16 EO,L-1,NA - cs:cs', 0;
db 'Prot 16 EO,L-1,NA - cs_base:cs_base', 0;
db 'Prot 16 EO,L-1,NA - cs_limit:cs_lim', 0;
db 'Prot 16 EO,L-1,NA - cs_attr:cs_attr', 0;
db 0,0,0,0 ; terminator
.s_szzRMEO:
db 'RM Post EO,L-1,NA - cs:cs', 0;
db 'RM Post EO,L-1,NA - cs_base:cs_base', 0;
db 'RM Post EO,L-1,NA - cs_limit:cs_lim', 0;
db 'RM Post EO,L-1,NA - cs_attr:cs_attr', 0;
db 0,0,0,0 ; terminator
.s_szzRMEO2:
db 'RM CS(0) EO,L-1 - cs:cs', 0;
db 'RM CS(0) EO,L-1 - cs_base:cs_base', 0;
db 'RM CS(0) EO,L-1 - cs_limit:cs_lim', 0;
db 'RM CS(0) EO,L-1 - cs_attr:cs_attr', 0;
db 0,0,0,0 ; terminator
.s_szTstRM:
db 'Real Mode Test', 0
ENDPROC rmTests
;
; Instantiate the template code.
;
%include "bootsector2-template-footer.mac" ; reset the initial environemnt.
%define TMPL_RM
%include "bootsector2-cpu-hidden-regs-1-template.mac"
;%define TMPL_CMN_V86
;%include "bootsector2-cpu-hidden-regs-1-template.mac"
%define TMPL_PE16
%include "bootsector2-cpu-hidden-regs-1-template.mac"
%define TMPL_PE32
%include "bootsector2-cpu-hidden-regs-1-template.mac"
;%define TMPL_PP16
;%include "bootsector2-cpu-hidden-regs-1-template.mac"
%define TMPL_PP32
%include "bootsector2-cpu-hidden-regs-1-template.mac"
;%define TMPL_PAE16
;%include "bootsector2-cpu-hidden-regs-1-template.mac"
;%define TMPL_PAE32
;%include "bootsector2-cpu-hidden-regs-1-template.mac"
;%define TMPL_LM16
;%include "bootsector2-cpu-hidden-regs-1-template.mac"
;%define TMPL_LM32
;%include "bootsector2-cpu-hidden-regs-1-template.mac"
%define TMPL_LM64
%include "bootsector2-cpu-hidden-regs-1-template.mac"
;
; End sections and image.
;
%include "bootsector2-common-end.mac"
|
