diff options
Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bootsector2-cpu-ac-loop.asm')
| -rw-r--r-- | src/VBox/ValidationKit/bootsectors/bootsector2-cpu-ac-loop.asm | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bootsector2-cpu-ac-loop.asm b/src/VBox/ValidationKit/bootsectors/bootsector2-cpu-ac-loop.asm new file mode 100644 index 00000000..6e5c5cb7 --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bootsector2-cpu-ac-loop.asm @@ -0,0 +1,125 @@ +; $Id: bootsector2-cpu-ac-loop.asm $ +;; @file +; Bootsector test for debug exceptions. +; +; Recommended (but not necessary): +; VBoxManage setextradata bs-cpu-xcpt-2 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 +; + + +;******************************************************************************* +;* Header Files * +;******************************************************************************* +%include "iprt/asmdefs.mac" +%include "iprt/x86.mac" +%include "VBox/VMMDevTesting.mac" + + +; +; Include and execute the init code. +; + %define BS2_INIT_PE32 + %define BS2_WITH_TRAPS + %define BS2_WITH_TRAPRECS + %define BS2_INC_PE32 + %define BS2_INC_RM ; for SetCpuModeGlobals_rm + %include "bootsector2-common-init-code.mac" + + +; +; The main() function. +; +BEGINPROC main + BITS 32 + ; + ; Test prologue. + ; + mov ax, .s_szTstName + call TestInit_p32 + call Bs2EnableA20_p32 + cli ; raw-mode hack + + ; + ; Execute the tests + ; + sub esp, 20h + + ; Get the address of the #AC IDT entry. + sidt [esp] + mov eax, [esp + 2] + add eax, 8 * X86_XCPT_AC + + ; Make it execute in ring-3. + mov word [eax + 2], BS2_SEL_R3_CS32 ; u16Sel + or byte [eax + 5], 3 << 5 ; u2Dpl = 3 + + ; Enable AC. + mov eax, cr0 + or eax, X86_CR0_AM + mov cr0, eax + + ; Switch to ring-3 + call Bs2ToRing3_p32 + + ; Enable AC. + pushfd + or dword [esp], X86_EFL_AC + popfd + + ;; Test it. - won't work as the handle touches CR2, which traps in ring-3. + ;BS2_TRAP_INSTR X86_XCPT_AC, 0, mov dword [esp + 3], 0 + + ; Misalign the stack and use it. + or esp, 3 + push esp ; this will loop forever on real intel hardware. + and esp, ~3h + + add esp, 20h + + ; + ; We're done. + ; + call TestTerm_p32 + ret + +.s_szTstName: + db 'tstCpuAcLoop', 0 +ENDPROC main + + +; +; End sections and image. +; +%include "bootsector2-common-end.mac" + |