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/* $Id: SUPR0IdcClientStubs.c $ */
/** @file
* VirtualBox Support Driver - IDC Client Lib, Stubs for SUPR0 APIs.
*/
/*
* Copyright (C) 2008-2023 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 "SUPR0IdcClientInternal.h"
#include <iprt/errcore.h>
#include <iprt/asm.h>
/**
* Resolves a symbol.
*
* @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.
*
* @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);
}
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