1 files changed, 90 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bootsector-shutdown.asm b/src/VBox/ValidationKit/bootsectors/bootsector-shutdown.asm
new file mode 100644
index 00000000..93ab5ff4
--- /dev/null
+++ b/src/VBox/ValidationKit/bootsectors/bootsector-shutdown.asm
@@ -0,0 +1,90 @@
+; $Id: bootsector-shutdown.asm $
+;; @file
+; Bootsector for grub chainloading that shutdowns the VM.
+;
+
+;
+; 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 "VBox/bios.mac"
+
+
+BITS 16
+start:
+    ; Start with a jump just to follow the convention.
+    jmp short the_code
+    nop
+times 3ah db 0
+
+the_code:
+    cli
+
+    ;
+    ; VBox/Bochs shutdown request - write "Shutdown" byte by byte to shutdown port.
+    ;
+    mov cx, 64
+    mov dx, VBOX_BIOS_SHUTDOWN_PORT
+    mov bx, VBOX_BIOS_OLD_SHUTDOWN_PORT
+retry:
+    mov al, 'S'
+    out dx, al
+    mov al, 'h'
+    out dx, al
+    mov al, 'u'
+    out dx, al
+    mov al, 't'
+    out dx, al
+    mov al, 'd'
+    out dx, al
+    mov al, 'o'
+    out dx, al
+    mov al, 'w'
+    out dx, al
+    mov al, 'n'
+    out dx, al
+    xchg dx, bx                         ; alternate between the new (VBox) and old (Bochs) ports.
+    loop retry
+
+    ;
+    ; Shutdown failed!
+    ;
+
+    ;; @todo print some message before halting.
+    hlt
+
+    ;
+    ; Padd the remainder of the sector with zeros and
+    ; end it with the dos signature.
+    ;
+padding:
+times 510 - (padding - start) db 0
+    db 055h, 0aah
+