1 files changed, 122 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/os2/initterm-r0drv-os2.cpp b/src/VBox/Runtime/r0drv/os2/initterm-r0drv-os2.cpp
new file mode 100644
index 00000000..24d45498
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/os2/initterm-r0drv-os2.cpp
@@ -0,0 +1,122 @@
+/* $Id: initterm-r0drv-os2.cpp $ */
+/** @file
+ * IPRT - Initialization & Termination, Ring-0 Driver, OS/2.
+ */
+
+/*
+ * Contributed by knut st. osmundsen.
+ *
+ * Copyright (C) 2007-2020 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE 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.
+ * --------------------------------------------------------------------
+ *
+ * This code is based on:
+ *
+ * Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "the-os2-kernel.h"
+
+#include "internal/initterm.h"
+#include <iprt/errcore.h>
+#include <iprt/assert.h>
+
+
+/*********************************************************************************************************************************
+*   Global Variables                                                                                                             *
+*********************************************************************************************************************************/
+/** Pointer to the 1st DOS variable table. */
+PCDOSTABLE  g_pDosTable = NULL;
+/** Pointer to the 2nd DOS variable table. */
+PCDOSTABLE2 g_pDosTable2 = NULL;
+/** Pointer to the global info segment. */
+PGINFOSEG   g_pGIS = NULL;
+/** Far 16:16 pointer to the local info segment.
+ * IIRC this must be converted to a flat pointer when accessed to work correctly on SMP systems. */
+RTFAR16     g_fpLIS = {0, 0};
+
+
+DECLHIDDEN(int) rtR0InitNative(void)
+{
+    /*
+     * Get the DOS Tables.
+     */
+    RTFAR16 fp;
+    int rc = RTR0Os2DHQueryDOSVar(DHGETDOSV_DOSTABLES, 0, &fp);
+    AssertMsgReturn(!rc, ("rc=%d\n", rc), VERR_INTERNAL_ERROR);
+    g_pDosTable = (PCDOSTABLE)RTR0Os2Virt2Flat(fp);
+    AssertReturn(g_pDosTable, VERR_INTERNAL_ERROR);
+    g_pDosTable2 = (PCDOSTABLE2)((const uint8_t *)g_pDosTable + g_pDosTable->cul * sizeof(ULONG) + 1);
+
+    /*
+     * Get the addresses of the two info segments.
+     */
+    rc = RTR0Os2DHQueryDOSVar(DHGETDOSV_SYSINFOSEG, 0, &fp);
+    AssertMsgReturn(!rc, ("rc=%d\n", rc), VERR_INTERNAL_ERROR);
+    g_pGIS = (PGINFOSEG)RTR0Os2Virt2Flat(fp);
+    rc = RTR0Os2DHQueryDOSVar(DHGETDOSV_LOCINFOSEG, 0, &fp);
+    AssertMsgReturn(!rc, ("rc=%d\n", rc), VERR_INTERNAL_ERROR);
+    g_fpLIS = fp;
+
+    return VINF_SUCCESS;
+}
+
+
+DECLHIDDEN(void) rtR0TermNative(void)
+{
+    /* nothing to do here yet. */
+}
+
+
+/**
+ * Converts a 16:16 pointer to a flat pointer.
+ *
+ * @returns Flat pointer (NULL if fp is NULL).
+ * @param   fp      Far pointer to convert.
+ */
+RTR0DECL(void *) RTR0Os2Virt2Flat(RTFAR16 fp)
+{
+    return (void *)KernSelToFlat(((uint32_t)fp.sel << 16) | fp.off);
+}
+