memuserkernel-r0drv-nt.cpp revision 71960eb538b1bd745505bd635ed17b97be9b1269
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync/* $Id$ */
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync/** @file
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * IPRT - User & Kernel Memory, Ring-0 Driver, NT.
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync */
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync/*
e64031e20c39650a7bc902a3e1aba613b9415deevboxsync * Copyright (C) 2009 Oracle Corporation
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync *
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * available from http://www.virtualbox.org. This file is free software;
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * you can redistribute it and/or modify it under the terms of the GNU
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * General Public License (GPL) as published by the Free Software
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync *
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * The contents of this file may alternatively be used under the terms
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * of the Common Development and Distribution License Version 1.0
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * VirtualBox OSE distribution, in which case the provisions of the
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * CDDL are applicable instead of those of the GPL.
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync *
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * You may elect to license modified versions of this file under the
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync * terms and conditions of either the GPL or the CDDL or both.
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync */
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync/*******************************************************************************
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync* Header Files *
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync*******************************************************************************/
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync#include "the-nt-kernel.h"
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync#include <iprt/mem.h>
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync#include <iprt/err.h>
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsyncRTR0DECL(int) RTR0MemUserCopyFrom(void *pvDst, RTR3PTR R3PtrSrc, size_t cb)
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync{
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync __try
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync {
c230143daf045c952a38c27b8370230d5d2547a0vboxsync ProbeForRead((PVOID)R3PtrSrc, cb, 1);
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync memcpy(pvDst, (void const *)R3PtrSrc, cb);
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync }
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync __except(EXCEPTION_EXECUTE_HANDLER)
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync {
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync return VERR_ACCESS_DENIED;
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync }
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync return VINF_SUCCESS;
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync}
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsyncRTR0DECL(int) RTR0MemUserCopyTo(RTR3PTR R3PtrDst, void const *pvSrc, size_t cb)
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync{
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync __try
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync {
c230143daf045c952a38c27b8370230d5d2547a0vboxsync ProbeForWrite((PVOID)R3PtrDst, cb, 1);
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync memcpy((void *)R3PtrDst, pvSrc, cb);
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync }
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync __except(EXCEPTION_EXECUTE_HANDLER)
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync {
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync return VERR_ACCESS_DENIED;
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync }
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync return VINF_SUCCESS;
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync}
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsyncRTR0DECL(bool) RTR0MemUserIsValidAddr(RTR3PTR R3Ptr)
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync{
7cf948cd8cc29a6ced02cb2570ad299545f1dfc2vboxsync#ifdef IPRT_TARGET_NT4
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync /* Play safe+wrong... it used to be a constant, but in w2k+ is a variable. */
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync return R3Ptr < _2G;
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync#else
c230143daf045c952a38c27b8370230d5d2547a0vboxsync return R3Ptr <= (uintptr_t)MM_HIGHEST_USER_ADDRESS;
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync#endif
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync}
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsyncRTR0DECL(bool) RTR0MemKernelIsValidAddr(void *pv)
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync{
7cf948cd8cc29a6ced02cb2570ad299545f1dfc2vboxsync#ifdef IPRT_TARGET_NT4
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync /* Play safe+wrong... it used to be a constant, but in w2k+ is a variable. */
71960eb538b1bd745505bd635ed17b97be9b1269vboxsync return (uintptr_t)pv >= _2G;
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync#else
c230143daf045c952a38c27b8370230d5d2547a0vboxsync return (uintptr_t)pv >= (uintptr_t)MM_SYSTEM_RANGE_START;
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync#endif
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync}
086f30e697aef37b4dbc818a42ecde0533bcc1d8vboxsync
522c8eb2dc41dc85adeb8343aa7c0d799335fcafvboxsync
e46c8087ca88848a243cbff553e04a29726ed556vboxsyncRTR0DECL(bool) RTR0MemAreKrnlAndUsrDifferent(void)
522c8eb2dc41dc85adeb8343aa7c0d799335fcafvboxsync{
522c8eb2dc41dc85adeb8343aa7c0d799335fcafvboxsync return true;
522c8eb2dc41dc85adeb8343aa7c0d799335fcafvboxsync}
522c8eb2dc41dc85adeb8343aa7c0d799335fcafvboxsync