| 1 | /* $Id: memuserkernel-r0drv-nt.cpp 29705 2010-05-20 15:58:39Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - User & Kernel Memory, Ring-0 Driver, NT.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*******************************************************************************
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| 29 | * Header Files *
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| 30 | *******************************************************************************/
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| 31 | #include "the-nt-kernel.h"
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| 32 |
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| 33 | #include <iprt/mem.h>
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| 34 | #include <iprt/err.h>
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| 35 |
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| 36 |
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| 37 | RTR0DECL(int) RTR0MemUserCopyFrom(void *pvDst, RTR3PTR R3PtrSrc, size_t cb)
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| 38 | {
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| 39 | __try
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| 40 | {
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| 41 | ProbeForRead((PVOID)R3PtrSrc, cb, 1);
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| 42 | memcpy(pvDst, (void const *)R3PtrSrc, cb);
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| 43 | }
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| 44 | __except(EXCEPTION_EXECUTE_HANDLER)
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| 45 | {
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| 46 | return VERR_ACCESS_DENIED;
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| 47 | }
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| 48 | return VINF_SUCCESS;
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| 49 | }
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| 50 |
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| 51 |
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| 52 | RTR0DECL(int) RTR0MemUserCopyTo(RTR3PTR R3PtrDst, void const *pvSrc, size_t cb)
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| 53 | {
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| 54 | __try
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| 55 | {
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| 56 | ProbeForWrite((PVOID)R3PtrDst, cb, 1);
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| 57 | memcpy((void *)R3PtrDst, pvSrc, cb);
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| 58 | }
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| 59 | __except(EXCEPTION_EXECUTE_HANDLER)
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| 60 | {
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| 61 | return VERR_ACCESS_DENIED;
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| 62 | }
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| 63 | return VINF_SUCCESS;
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| 64 | }
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| 65 |
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| 66 |
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| 67 | RTR0DECL(bool) RTR0MemUserIsValidAddr(RTR3PTR R3Ptr)
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| 68 | {
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| 69 | #ifdef IPRT_TARGET_NT4
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| 70 | /* Play safe+wrong... it used to be a constant, but in w2k+ is a variable. */
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| 71 | return R3Ptr < _2G;
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| 72 | #else
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| 73 | return R3Ptr <= (uintptr_t)MM_HIGHEST_USER_ADDRESS;
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| 74 | #endif
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| 75 | }
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| 76 |
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| 77 |
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| 78 | RTR0DECL(bool) RTR0MemKernelIsValidAddr(void *pv)
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| 79 | {
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| 80 | #ifdef IPRT_TARGET_NT4
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| 81 | /* Play safe+wrong... it used to be a constant, but in w2k+ is a variable. */
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| 82 | return (uintptr_t)pv >= _2G;
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| 83 | #else
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| 84 | return (uintptr_t)pv >= (uintptr_t)MM_SYSTEM_RANGE_START;
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| 85 | #endif
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| 86 | }
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| 87 |
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| 88 |
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| 89 | RTR0DECL(bool) RTR0MemAreKrnlAndUsrDifferent(void)
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| 90 | {
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| 91 | return true;
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| 92 | }
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| 93 |
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