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/* $Id: memuserkernel-r0drv-nt.cpp $ */
/** @file
* IPRT - User & Kernel Memory, Ring-0 Driver, NT.
*/
/*
* Copyright (C) 2009-2019 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 "the-nt-kernel.h"
#include <iprt/mem.h>
#include <iprt/errcore.h>
#include "internal-r0drv-nt.h"
RTR0DECL(int) RTR0MemUserCopyFrom(void *pvDst, RTR3PTR R3PtrSrc, size_t cb)
{
__try
{
ProbeForRead((PVOID)R3PtrSrc, cb, 1);
memcpy(pvDst, (void const *)R3PtrSrc, cb);
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
return VERR_ACCESS_DENIED;
}
return VINF_SUCCESS;
}
RTR0DECL(int) RTR0MemUserCopyTo(RTR3PTR R3PtrDst, void const *pvSrc, size_t cb)
{
__try
{
ProbeForWrite((PVOID)R3PtrDst, cb, 1);
memcpy((void *)R3PtrDst, pvSrc, cb);
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
return VERR_ACCESS_DENIED;
}
return VINF_SUCCESS;
}
RTR0DECL(bool) RTR0MemUserIsValidAddr(RTR3PTR R3Ptr)
{
#ifdef IPRT_TARGET_NT4
uintptr_t const uLast = g_puRtMmHighestUserAddress ? *g_puRtMmHighestUserAddress : ~(uintptr_t)0 / 2;
#else
uintptr_t const uLast = (uintptr_t)MM_HIGHEST_USER_ADDRESS;
#endif
return R3Ptr <= uLast;
}
RTR0DECL(bool) RTR0MemKernelIsValidAddr(void *pv)
{
#ifdef IPRT_TARGET_NT4
uintptr_t const uFirst = g_puRtMmSystemRangeStart ? *g_puRtMmSystemRangeStart : ~(uintptr_t)0 / 2 + 1;
#else
uintptr_t const uFirst = (uintptr_t)MM_SYSTEM_RANGE_START;
#endif
return (uintptr_t)pv >= uFirst;
}
RTR0DECL(bool) RTR0MemAreKrnlAndUsrDifferent(void)
{
return true;
}
RTR0DECL(int) RTR0MemKernelCopyFrom(void *pvDst, void const *pvSrc, size_t cb)
{
__try
{
memcpy(pvDst, pvSrc, cb);
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
return VERR_ACCESS_DENIED;
}
return VINF_SUCCESS;
}
RTR0DECL(int) RTR0MemKernelCopyTo(void *pvDst, void const *pvSrc, size_t cb)
{
__try
{
memcpy(pvDst, pvSrc, cb);
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
return VERR_ACCESS_DENIED;
}
return VINF_SUCCESS;
}
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