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Diffstat (limited to '')
-rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-first-pe16.asm | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-first-pe16.asm b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-first-pe16.asm new file mode 100644 index 00000000..cad3787e --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-first-pe16.asm @@ -0,0 +1,105 @@ +; $Id: bs3-first-pe16.asm $ +;; @file +; BS3Kit - First Object, calling 16-bit protected-mode main(). +; + +; +; 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 * +;********************************************************************************************************************************* + +; +; Segment defs, grouping and related variables. +; Defines the entry point 'start' as well, leaving us in BS3TEXT16. +; +%include "bs3-first-common.mac" + + +;********************************************************************************************************************************* +;* External Symbols * +;********************************************************************************************************************************* +BS3_BEGIN_DATA16 + +BS3_BEGIN_RMTEXT16 +extern _Bs3CpuDetect_rm_far +extern _Bs3InitMemory_rm_far + +BS3_BEGIN_TEXT16 +BS3_EXTERN_CMN Bs3PicMaskAll +BS3_EXTERN_CMN Bs3Trap16Init +extern _Bs3SwitchToPE16_rm +extern _Main_pe16 +BS3_EXTERN_CMN Bs3Shutdown + + +BS3_BEGIN_TEXT16 + ; + ; Zero return address and zero caller BP. + ; + xor ax, ax + push ax + push ax + mov bp, sp + + ; + ; Load DS and ES with data selectors. + ; + mov ax, BS3KIT_GRPNM_DATA16 + mov ds, ax + mov es, ax + + + ; + ; Make sure interrupts are disabled as we cannot (don't want to) service + ; BIOS interrupts once we switch mode. + ; + cli + call Bs3PicMaskAll + + ; + ; Initialize 16-bit protected mode. + ; + call far _Bs3CpuDetect_rm_far + call far _Bs3InitMemory_rm_far + call Bs3Trap16Init + + ; + ; Switch to PE16 and call main. + ; + call _Bs3SwitchToPE16_rm + call _Main_pe16 + + ; Try shutdown if it returns. + call Bs3Shutdown + |