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Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bootsector2-cpu-hidden-regs-1.asm')
| -rw-r--r-- | src/VBox/ValidationKit/bootsectors/bootsector2-cpu-hidden-regs-1.asm | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bootsector2-cpu-hidden-regs-1.asm b/src/VBox/ValidationKit/bootsectors/bootsector2-cpu-hidden-regs-1.asm new file mode 100644 index 00000000..a6ecc634 --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bootsector2-cpu-hidden-regs-1.asm @@ -0,0 +1,285 @@ +; $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) 2007-2023 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" + |