1 | /* $Id: SUPR0IdcClientStubs.c 99739 2023-05-11 01:01:08Z vboxsync $ */
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2 | /** @file
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3 | * VirtualBox Support Driver - IDC Client Lib, Stubs for SUPR0 APIs.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2008-2023 Oracle and/or its affiliates.
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8 | *
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9 | * This file is part of VirtualBox base platform packages, as
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10 | * available from https://www.virtualbox.org.
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11 | *
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12 | * This program is free software; you can redistribute it and/or
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13 | * modify it under the terms of the GNU General Public License
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14 | * as published by the Free Software Foundation, in version 3 of the
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15 | * License.
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16 | *
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17 | * This program is distributed in the hope that it will be useful, but
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18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 | * General Public License for more details.
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21 | *
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22 | * You should have received a copy of the GNU General Public License
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23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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24 | *
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25 | * The contents of this file may alternatively be used under the terms
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26 | * of the Common Development and Distribution License Version 1.0
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27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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28 | * in the VirtualBox distribution, in which case the provisions of the
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29 | * CDDL are applicable instead of those of the GPL.
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30 | *
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31 | * You may elect to license modified versions of this file under the
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32 | * terms and conditions of either the GPL or the CDDL or both.
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33 | *
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34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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35 | */
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36 |
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37 |
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38 | /*********************************************************************************************************************************
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39 | * Header Files *
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40 | *********************************************************************************************************************************/
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41 | #include "SUPR0IdcClientInternal.h"
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42 | #include <iprt/errcore.h>
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43 | #include <iprt/asm.h>
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44 |
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45 |
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46 | /**
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47 | * Resolves a symbol.
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48 | *
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49 | * @param pHandle The IDC handle.
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50 | * @param ppfn Where to return the address of the symbol.
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51 | * @param pszName The name of the symbol.
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52 | */
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53 | static void supR0IdcGetSymbol(PSUPDRVIDCHANDLE pHandle, PFNRT *ppfn, const char *pszName)
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54 | {
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55 | SUPDRVIDCREQGETSYM Req;
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56 | int rc;
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57 |
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58 | /*
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59 | * Create and send a get symbol request.
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60 | */
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61 | Req.Hdr.cb = sizeof(Req);
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62 | Req.Hdr.rc = VERR_WRONG_ORDER;
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63 | Req.Hdr.pSession = pHandle->s.pSession;
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64 | Req.u.In.pszSymbol = pszName;
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65 | Req.u.In.pszModule = NULL;
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66 | rc = supR0IdcNativeCall(pHandle, SUPDRV_IDC_REQ_GET_SYMBOL, &Req.Hdr);
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67 | if (RT_SUCCESS(rc))
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68 | ASMAtomicWritePtr((void * volatile *)ppfn, (void *)(uintptr_t)Req.u.Out.pfnSymbol);
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69 | }
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70 |
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71 |
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72 | /**
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73 | * Resolves a symbol.
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74 | *
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75 | * @param pSession The IDC session.
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76 | * @param ppfn Where to return the address of the symbol.
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77 | * @param pszName The name of the symbol.
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78 | */
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79 | static void supR0IdcGetSymbolBySession(PSUPDRVSESSION pSession, PFNRT *ppfn, const char *pszName)
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80 | {
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81 | PSUPDRVIDCHANDLE pHandle = supR0IdcGetHandleFromSession(pSession);
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82 | if (pHandle)
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83 | supR0IdcGetSymbol(pHandle, ppfn, pszName);
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84 | }
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85 |
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86 |
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87 | SUPR0DECL(void *) SUPR0ObjRegister(PSUPDRVSESSION pSession, SUPDRVOBJTYPE enmType, PFNSUPDRVDESTRUCTOR pfnDestructor, void *pvUser1, void *pvUser2)
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88 | {
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89 | static DECLCALLBACKPTR(void *, s_pfn,(PSUPDRVSESSION /* pSession */, SUPDRVOBJTYPE /* enmType */, PFNSUPDRVDESTRUCTOR /* pfnDestructor */, void * /* pvUser1 */, void * /* pvUser2 */));
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90 | DECLCALLBACKPTR(void *, pfn,(PSUPDRVSESSION /* pSession */, SUPDRVOBJTYPE /* enmType */, PFNSUPDRVDESTRUCTOR /* pfnDestructor */, void * /* pvUser1 */, void * /* pvUser2 */));
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91 | pfn = s_pfn;
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92 | if (!pfn)
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93 | {
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94 | supR0IdcGetSymbolBySession(pSession, (PFNRT *)&s_pfn, "SUPR0ObjRegister");
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95 | pfn = s_pfn;
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96 | if (!pfn)
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97 | return NULL;
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98 | }
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99 |
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100 | return pfn(pSession, enmType, pfnDestructor, pvUser1, pvUser2);
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101 | }
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102 |
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103 |
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104 | SUPR0DECL(int) SUPR0ObjAddRef(void *pvObj, PSUPDRVSESSION pSession)
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105 | {
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106 | static DECLCALLBACKPTR(int, s_pfn,(void * /* pvObj */, PSUPDRVSESSION /* pSession */));
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107 | DECLCALLBACKPTR(int, pfn,(void * /* pvObj */, PSUPDRVSESSION /* pSession */));
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108 | pfn = s_pfn;
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109 | if (!pfn)
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110 | {
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111 | supR0IdcGetSymbolBySession(pSession, (PFNRT *)&s_pfn, "SUPR0ObjAddRef");
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112 | pfn = s_pfn;
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113 | if (!pfn)
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114 | return VERR_NOT_SUPPORTED;
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115 | }
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116 |
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117 | return pfn(pvObj, pSession);
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118 | }
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119 |
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120 |
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121 | SUPR0DECL(int) SUPR0ObjRelease(void *pvObj, PSUPDRVSESSION pSession)
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122 | {
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123 | static DECLCALLBACKPTR(int, s_pfn,(void * /* pvObj */, PSUPDRVSESSION /* pSession */));
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124 | DECLCALLBACKPTR(int, pfn,(void * /* pvObj */, PSUPDRVSESSION /* pSession */));
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125 | pfn = s_pfn;
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126 | if (!pfn)
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127 | {
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128 | supR0IdcGetSymbolBySession(pSession, (PFNRT *)&s_pfn, "SUPR0ObjRelease");
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129 | pfn = s_pfn;
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130 | if (!pfn)
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131 | return VERR_NOT_SUPPORTED;
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132 | }
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133 |
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134 | return pfn(pvObj, pSession);
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135 | }
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136 |
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137 |
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138 | SUPR0DECL(int) SUPR0ObjVerifyAccess(void *pvObj, PSUPDRVSESSION pSession, const char *pszObjName)
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139 | {
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140 | static DECLCALLBACKPTR(int, s_pfn,(void * /* pvObj */, PSUPDRVSESSION /* pSession */, const char * /* pszObjName */));
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141 | DECLCALLBACKPTR(int, pfn,(void * /* pvObj */, PSUPDRVSESSION /* pSession */, const char * /* pszObjName */));
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142 | pfn = s_pfn;
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143 | if (!pfn)
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144 | {
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145 | supR0IdcGetSymbolBySession(pSession, (PFNRT *)&s_pfn, "SUPR0ObjVerifyAccess");
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146 | pfn = s_pfn;
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147 | if (!pfn)
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148 | return VERR_NOT_SUPPORTED;
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149 | }
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150 |
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151 | return pfn(pvObj, pSession, pszObjName);
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152 | }
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153 |
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