1 | /* $Id: memuserkernel-r0drv-os2.cpp 44529 2013-02-04 15:54:15Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - User & Kernel Memory, Ring-0 Driver, OS/2.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2009-2012 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-os2-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 | int rc = KernCopyIn(pvDst, (void *)R3PtrSrc, cb);
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40 | if (RT_LIKELY(rc == 0))
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41 | return VINF_SUCCESS;
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42 | return VERR_ACCESS_DENIED;
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43 | }
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44 |
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45 |
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46 | RTR0DECL(int) RTR0MemUserCopyTo(RTR3PTR R3PtrDst, void const *pvSrc, size_t cb)
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47 | {
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48 | int rc = KernCopyOut((void *)R3PtrDst, (void *)pvSrc, cb);
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49 | if (RT_LIKELY(rc == 0))
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50 | return VINF_SUCCESS;
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51 | return VERR_ACCESS_DENIED;
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52 | }
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53 |
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54 |
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55 | RTR0DECL(bool) RTR0MemUserIsValidAddr(RTR3PTR R3Ptr)
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56 | {
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57 | /** @todo this is all wrong, but I'm too lazy to figure out how to make it
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58 | * correct. Checking the user DS limit would work if it wasn't maxed
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59 | * out by SDD, VPC or someone. The version (+SMP) would help on older
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60 | * OS/2 versions where the limit is 512MB. */
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61 | return R3Ptr < UINT32_C(0xc0000000); /* 3GB */
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62 | }
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63 |
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64 |
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65 | RTR0DECL(bool) RTR0MemKernelIsValidAddr(void *pv)
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66 | {
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67 | /** @todo this is all wrong, see RTR0MemUserIsValidAddr. */
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68 | return (uintptr_t)pv >= UINT32_C(0x20000000); /* 512MB */
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69 | }
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70 |
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71 |
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72 | RTR0DECL(bool) RTR0MemAreKrnlAndUsrDifferent(void)
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73 | {
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74 | /** @todo this is all wrong, see RTR0MemUserIsValidAddr. */
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75 | return false;
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76 | }
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77 |
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78 |
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79 | RTR0DECL(int) RTR0MemKernelCopyFrom(void *pvDst, void const *pvSrc, size_t cb)
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80 | {
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81 | return VERR_NOT_SUPPORTED;
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82 | }
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83 |
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84 |
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85 | RTR0DECL(int) RTR0MemKernelCopyTo(void *pvDst, void const *pvSrc, size_t cb)
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86 | {
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87 | return VERR_NOT_SUPPORTED;
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88 | }
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89 |
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