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/* $Id: memuserkernel-r0drv-linux.c $ */
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* IPRT - User & Kernel Memory, Ring-0 Driver, Linux.
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* Copyright (C) 2009 Sun Microsystems, Inc.
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* This file is part of VirtualBox Open Source Edition (OSE), as
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* available from http://www.virtualbox.org. This file is free software;
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* you can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) as published by the Free Software
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* Foundation, in version 2 as it comes in the "COPYING" file of the
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* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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* The contents of this file may alternatively be used under the terms
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* of the Common Development and Distribution License Version 1.0
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* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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* VirtualBox OSE distribution, in which case the provisions of the
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* CDDL are applicable instead of those of the GPL.
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* You may elect to license modified versions of this file under the
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* terms and conditions of either the GPL or the CDDL or both.
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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* Clara, CA 95054 USA or visit http://www.sun.com if you need
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* additional information or have any questions.
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/*******************************************************************************
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*******************************************************************************/
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#include "the-linux-kernel.h"
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#include "internal/iprt.h"
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RTR0DECL(int) RTR0MemUserCopyFrom(void *pvDst, RTR3PTR R3PtrSrc, size_t cb)
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if (RT_LIKELY(copy_from_user(pvDst, (void *)R3PtrSrc, cb) == 0))
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return VERR_ACCESS_DENIED;
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RT_EXPORT_SYMBOL(RTR0MemUserCopyFrom);
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RTR0DECL(int) RTR0MemUserCopyTo(RTR3PTR R3PtrDst, void const *pvSrc, size_t cb)
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if (RT_LIKELY(copy_to_user((void *)R3PtrDst, pvSrc, cb) == 0))
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return VERR_ACCESS_DENIED;
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RT_EXPORT_SYMBOL(RTR0MemUserCopyTo);
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RTR0DECL(bool) RTR0MemUserIsValidAddr(RTR3PTR R3Ptr)
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return access_ok(VERIFY_READ, (void *)R3Ptr, 1);
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RT_EXPORT_SYMBOL(RTR0MemUserIsValidAddr);
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RTR0DECL(bool) RTR0MemKernelIsValidAddr(void *pv)
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/* Couldn't find a straight forward way of doing this... */
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# ifdef CONFIG_X86_HIGH_ENTRY
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return (uintptr_t)pv >= PAGE_OFFSET;
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#elif defined(RT_ARCH_AMD64)
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# ifdef KERNEL_IMAGE_START
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return (uintptr_t)pv >= KERNEL_IMAGE_START;
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return (uintptr_t)pv >= KERNEL_TEXT_START;
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return !access_ok(VERIFY_READ, pv, 1);
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RT_EXPORT_SYMBOL(RTR0MemKernelIsValidAddr);
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RTR0DECL(bool) RTR0MemAreKrnlAndUsrDifferent(void)
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#if defined(RT_ARCH_X86) && defined(CONFIG_X86_HIGH_ENTRY) /* ?? */
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RT_EXPORT_SYMBOL(RTR0MemAreKrnlAndUsrDifferent);