1 files changed, 147 insertions, 0 deletions
diff --git a/src/VBox/HostDrivers/Support/SUPR0IdcClientStubs.c b/src/VBox/HostDrivers/Support/SUPR0IdcClientStubs.c
new file mode 100644
index 00000000..acf525c5
--- /dev/null
+++ b/src/VBox/HostDrivers/Support/SUPR0IdcClientStubs.c
@@ -0,0 +1,147 @@
+/* $Id: SUPR0IdcClientStubs.c $ */
+/** @file
+ * VirtualBox Support Driver - IDC Client Lib, Stubs for SUPR0 APIs.
+ */
+
+/*
+ * Copyright (C) 2008-2019 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.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "SUPR0IdcClientInternal.h"
+#include <iprt/errcore.h>
+#include <iprt/asm.h>
+
+
+/**
+ * Resolves a symbol.
+ *
+ * @returns Pointer to the symbol on success, NULL on failure.
+ *
+ * @param   pHandle     The IDC handle.
+ * @param   ppfn        Where to return the address of the symbol.
+ * @param   pszName     The name of the symbol.
+ */
+static void supR0IdcGetSymbol(PSUPDRVIDCHANDLE pHandle, PFNRT *ppfn, const char *pszName)
+{
+    SUPDRVIDCREQGETSYM Req;
+    int rc;
+
+    /*
+     * Create and send a get symbol request.
+     */
+    Req.Hdr.cb = sizeof(Req);
+    Req.Hdr.rc = VERR_WRONG_ORDER;
+    Req.Hdr.pSession = pHandle->s.pSession;
+    Req.u.In.pszSymbol = pszName;
+    Req.u.In.pszModule = NULL;
+    rc = supR0IdcNativeCall(pHandle, SUPDRV_IDC_REQ_GET_SYMBOL, &Req.Hdr);
+    if (RT_SUCCESS(rc))
+        ASMAtomicWritePtr((void * volatile *)ppfn, (void *)(uintptr_t)Req.u.Out.pfnSymbol);
+}
+
+
+/**
+ * Resolves a symbol.
+ *
+ * @returns Pointer to the symbol on success, NULL on failure.
+ *
+ * @param   pSession    The IDC session.
+ * @param   ppfn        Where to return the address of the symbol.
+ * @param   pszName     The name of the symbol.
+ */
+static void supR0IdcGetSymbolBySession(PSUPDRVSESSION pSession, PFNRT *ppfn, const char *pszName)
+{
+    PSUPDRVIDCHANDLE pHandle = supR0IdcGetHandleFromSession(pSession);
+    if (pHandle)
+        supR0IdcGetSymbol(pHandle, ppfn, pszName);
+}
+
+
+SUPR0DECL(void *) SUPR0ObjRegister(PSUPDRVSESSION pSession, SUPDRVOBJTYPE enmType, PFNSUPDRVDESTRUCTOR pfnDestructor, void *pvUser1, void *pvUser2)
+{
+    static DECLCALLBACKPTR(void *, s_pfn)(PSUPDRVSESSION /* pSession */, SUPDRVOBJTYPE /* enmType */, PFNSUPDRVDESTRUCTOR /* pfnDestructor */, void * /* pvUser1 */, void * /* pvUser2 */);
+    DECLCALLBACKPTR(void *,          pfn)(PSUPDRVSESSION /* pSession */, SUPDRVOBJTYPE /* enmType */, PFNSUPDRVDESTRUCTOR /* pfnDestructor */, void * /* pvUser1 */, void * /* pvUser2 */);
+    pfn = s_pfn;
+    if (!pfn)
+    {
+        supR0IdcGetSymbolBySession(pSession, (PFNRT *)&s_pfn, "SUPR0ObjRegister");
+        pfn = s_pfn;
+        if (!pfn)
+            return NULL;
+    }
+
+    return pfn(pSession, enmType, pfnDestructor, pvUser1, pvUser2);
+}
+
+
+SUPR0DECL(int) SUPR0ObjAddRef(void *pvObj, PSUPDRVSESSION pSession)
+{
+    static DECLCALLBACKPTR(int, s_pfn)(void * /* pvObj */, PSUPDRVSESSION /* pSession */);
+    DECLCALLBACKPTR(int,          pfn)(void * /* pvObj */, PSUPDRVSESSION /* pSession */);
+    pfn = s_pfn;
+    if (!pfn)
+    {
+        supR0IdcGetSymbolBySession(pSession, (PFNRT *)&s_pfn, "SUPR0ObjAddRef");
+        pfn = s_pfn;
+        if (!pfn)
+            return VERR_NOT_SUPPORTED;
+    }
+
+    return pfn(pvObj, pSession);
+}
+
+
+SUPR0DECL(int) SUPR0ObjRelease(void *pvObj, PSUPDRVSESSION pSession)
+{
+    static DECLCALLBACKPTR(int, s_pfn)(void * /* pvObj */, PSUPDRVSESSION /* pSession */);
+    DECLCALLBACKPTR(int,          pfn)(void * /* pvObj */, PSUPDRVSESSION /* pSession */);
+    pfn = s_pfn;
+    if (!pfn)
+    {
+        supR0IdcGetSymbolBySession(pSession, (PFNRT *)&s_pfn, "SUPR0ObjRelease");
+        pfn = s_pfn;
+        if (!pfn)
+            return VERR_NOT_SUPPORTED;
+    }
+
+    return pfn(pvObj, pSession);
+}
+
+
+SUPR0DECL(int) SUPR0ObjVerifyAccess(void *pvObj, PSUPDRVSESSION pSession, const char *pszObjName)
+{
+    static DECLCALLBACKPTR(int, s_pfn)(void * /* pvObj */, PSUPDRVSESSION /* pSession */, const char * /* pszObjName */);
+    DECLCALLBACKPTR(int,          pfn)(void * /* pvObj */, PSUPDRVSESSION /* pSession */, const char * /* pszObjName */);
+    pfn = s_pfn;
+    if (!pfn)
+    {
+        supR0IdcGetSymbolBySession(pSession, (PFNRT *)&s_pfn, "SUPR0ObjVerifyAccess");
+        pfn = s_pfn;
+        if (!pfn)
+            return VERR_NOT_SUPPORTED;
+    }
+
+    return pfn(pvObj, pSession, pszObjName);
+}
+