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diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PerCpuData.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PerCpuData.c
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+/* $Id: bs3-cmn-PerCpuData.c $ */
+/** @file
+ * BS3Kit - Per CPU Data.
+ *
+ * @remarks Not quite sure how to do per-cpu data yet, but this is stuff
+ * that eventually needs to be per CPU.
+ */
+
+/*
+ * 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 "bs3kit-template-header.h"
+#include "bs3-cmn-test.h"
+
+
+/*********************************************************************************************************************************
+* Global Variables *
+*********************************************************************************************************************************/
+#if ARCH_BITS == 16
+
+/** Hint for 16-bit trap handlers regarding the high word of EIP. */
+uint32_t g_uBs3TrapEipHint = 0;
+
+/** Flat pointer to a BS3TRAPFRAME registered by Bs3TrapSetJmp.
+ * When this is non-zero, the setjmp is considered armed. */
+uint32_t g_pBs3TrapSetJmpFrame = 0;
+
+/** The current CPU mode. */
+uint8_t g_bBs3CurrentMode = BS3_MODE_RM;
+
+uint8_t g_bStupidUnalignedCompiler1 = 0xfe;
+
+/** Set to disable special V8086 \#GP and \#UD handling in Bs3TrapDefaultHandler.
+ * This is useful for getting */
+bool volatile g_fBs3TrapNoV86Assist = false;
+
+/** The context of the last Bs3TrapSetJmp call.
+ * This will have eax set to 1 and need only be restored when it triggers. */
+BS3REGCTX g_Bs3TrapSetJmpCtx;
+
+#endif /* ARCH_BITS == 16 */
+