1 | /* $Id: tstLdr-3.cpp 74856 2018-10-16 00:49:25Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - Testcase for parts of RTLdr*, manual inspection.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2017 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 <iprt/ldr.h>
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32 | #include <iprt/alloc.h>
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33 | #include <iprt/stream.h>
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34 | #include <iprt/assert.h>
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35 | #include <iprt/initterm.h>
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36 | #include <iprt/err.h>
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37 | #include <iprt/string.h>
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38 | #include <VBox/dis.h>
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39 |
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40 |
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41 | /*********************************************************************************************************************************
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42 | * Global Variables *
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43 | *********************************************************************************************************************************/
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44 | static RTUINTPTR g_uLoadAddr;
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45 | static RTLDRMOD g_hLdrMod;
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46 | static void *g_pvBits;
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47 | static uint8_t g_cBits;
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48 | static uint8_t g_fNearImports;
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49 |
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50 | /**
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51 | * Current nearest symbol.
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52 | */
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53 | typedef struct TESTNEARSYM
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54 | {
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55 | RTUINTPTR Addr;
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56 | struct TESTSYM
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57 | {
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58 | RTUINTPTR Value;
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59 | unsigned uSymbol;
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60 | char szName[512];
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61 | } aSyms[2];
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62 | } TESTNEARSYM, *PTESTNEARSYM;
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63 |
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64 | /**
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65 | * Enumeration callback function used by RTLdrEnumSymbols().
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66 | *
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67 | * @returns iprt status code. Failure will stop the enumeration.
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68 | * @param hLdrMod The loader module handle.
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69 | * @param pszSymbol Symbol name. NULL if ordinal only.
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70 | * @param uSymbol Symbol ordinal, ~0 if not used.
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71 | * @param Value Symbol value.
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72 | * @param pvUser The user argument specified to RTLdrEnumSymbols().
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73 | */
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74 | static DECLCALLBACK(int) testEnumSymbol2(RTLDRMOD hLdrMod, const char *pszSymbol, unsigned uSymbol, RTUINTPTR Value, void *pvUser)
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75 | {
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76 | RT_NOREF1(hLdrMod);
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77 | PTESTNEARSYM pSym = (PTESTNEARSYM)pvUser;
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78 |
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79 | /* less or equal */
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80 | if ( Value <= pSym->Addr
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81 | && ( Value > pSym->aSyms[0].Value
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82 | || ( Value == pSym->aSyms[0].Value
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83 | && !pSym->aSyms[0].szName[0]
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84 | && pszSymbol
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85 | && *pszSymbol
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86 | )
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87 | )
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88 | )
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89 | {
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90 | pSym->aSyms[0].Value = Value;
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91 | pSym->aSyms[0].uSymbol = uSymbol;
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92 | pSym->aSyms[0].szName[0] = '\0';
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93 | if (pszSymbol)
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94 | strncat(pSym->aSyms[0].szName, pszSymbol, sizeof(pSym->aSyms[0].szName)-1);
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95 | }
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96 |
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97 | /* above */
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98 | if ( Value > pSym->Addr
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99 | && ( Value < pSym->aSyms[1].Value
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100 | || ( Value == pSym->aSyms[1].Value
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101 | && !pSym->aSyms[1].szName[1]
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102 | && pszSymbol
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103 | && *pszSymbol
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104 | )
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105 | )
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106 | )
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107 | {
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108 | pSym->aSyms[1].Value = Value;
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109 | pSym->aSyms[1].uSymbol = uSymbol;
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110 | pSym->aSyms[1].szName[0] = '\0';
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111 | if (pszSymbol)
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112 | strncat(pSym->aSyms[1].szName, pszSymbol, sizeof(pSym->aSyms[1].szName)-1);
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113 | }
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114 |
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115 | return VINF_SUCCESS;
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116 | }
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117 |
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118 | static int FindNearSymbol(RTUINTPTR uAddr, PTESTNEARSYM pNearSym)
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119 | {
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120 | RT_ZERO(*pNearSym);
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121 | pNearSym->Addr = (RTUINTPTR)uAddr;
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122 | pNearSym->aSyms[1].Value = ~(RTUINTPTR)0;
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123 | int rc = RTLdrEnumSymbols(g_hLdrMod, RTLDR_ENUM_SYMBOL_FLAGS_ALL, g_pvBits, g_uLoadAddr, testEnumSymbol2, pNearSym);
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124 | if (RT_FAILURE(rc))
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125 | RTPrintf("tstLdr-3: Failed to enumerate symbols: %Rra\n", rc);
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126 | return rc;
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127 | }
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128 |
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129 | static DECLCALLBACK(int) MyGetSymbol(PCDISCPUSTATE pCpu, uint32_t u32Sel, RTUINTPTR uAddress,
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130 | char *pszBuf, size_t cchBuf, RTINTPTR *poff,
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131 | void *pvUser)
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132 | {
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133 | RT_NOREF3(pCpu, u32Sel, pvUser);
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134 |
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135 | if ( uAddress > RTLdrSize(g_hLdrMod) + g_uLoadAddr
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136 | || uAddress < g_uLoadAddr)
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137 | return VERR_SYMBOL_NOT_FOUND;
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138 |
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139 | TESTNEARSYM NearSym;
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140 | int rc = FindNearSymbol(uAddress, &NearSym);
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141 | if (RT_FAILURE(rc))
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142 | return rc;
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143 |
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144 | RTStrCopy(pszBuf, cchBuf, NearSym.aSyms[0].szName);
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145 | *poff = uAddress - NearSym.aSyms[0].Value;
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146 | return VINF_SUCCESS;
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147 | }
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148 |
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149 |
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150 | /**
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151 | * @callback_method_impl{FNDISREADBYTES}
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152 | */
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153 | static DECLCALLBACK(int) MyReadBytes(PDISCPUSTATE pDis, uint8_t offInstr, uint8_t cbMinRead, uint8_t cbMaxRead)
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154 | {
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155 | RT_NOREF1(cbMaxRead);
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156 | uint8_t const *pbSrc = (uint8_t const *)((uintptr_t)pDis->uInstrAddr + (uintptr_t)pDis->pvUser + offInstr);
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157 | memcpy(&pDis->abInstr[offInstr], pbSrc, cbMinRead);
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158 | pDis->cbCachedInstr = offInstr + cbMinRead;
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159 | return VINF_SUCCESS;
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160 | }
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161 |
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162 |
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163 | static bool MyDisBlock(DISCPUMODE enmCpuMode, RTHCUINTPTR pvCodeBlock, int32_t cbMax, RTUINTPTR off,
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164 | RTUINTPTR uNearAddr, RTUINTPTR uSearchAddr)
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165 | {
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166 | DISCPUSTATE Cpu;
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167 | int32_t i = 0;
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168 | while (i < cbMax)
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169 | {
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170 | bool fQuiet = RTAssertSetQuiet(true);
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171 | bool fMayPanic = RTAssertSetMayPanic(false);
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172 | char szOutput[256];
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173 | unsigned cbInstr;
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174 | int rc = DISInstrWithReader(uNearAddr + i, enmCpuMode,
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175 | MyReadBytes, (uint8_t *)pvCodeBlock - (uintptr_t)uNearAddr,
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176 | &Cpu, &cbInstr);
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177 | RTAssertSetMayPanic(fMayPanic);
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178 | RTAssertSetQuiet(fQuiet);
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179 | if (RT_FAILURE(rc))
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180 | return false;
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181 |
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182 | TESTNEARSYM NearSym;
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183 | rc = FindNearSymbol(uNearAddr + i, &NearSym);
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184 | if (RT_SUCCESS(rc) && NearSym.aSyms[0].Value == NearSym.Addr)
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185 | RTPrintf("%s:\n", NearSym.aSyms[0].szName);
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186 |
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187 | DISFormatYasmEx(&Cpu, szOutput, sizeof(szOutput),
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188 | DIS_FMT_FLAGS_RELATIVE_BRANCH | DIS_FMT_FLAGS_BYTES_RIGHT | DIS_FMT_FLAGS_ADDR_LEFT | DIS_FMT_FLAGS_BYTES_SPACED,
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189 | MyGetSymbol, NULL);
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190 |
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191 | RTPrintf("%s\n", szOutput);
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192 | if (pvCodeBlock + i + off == uSearchAddr)
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193 | RTPrintf("^^^^^^^^\n");
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194 |
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195 | /* next */
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196 | i += cbInstr;
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197 | }
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198 | return true;
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199 | }
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200 |
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201 |
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202 |
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203 | /**
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204 | * Resolve an external symbol during RTLdrGetBits().
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205 | *
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206 | * @returns iprt status code.
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207 | * @param hLdrMod The loader module handle.
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208 | * @param pszModule Module name.
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209 | * @param pszSymbol Symbol name, NULL if uSymbol should be used.
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210 | * @param uSymbol Symbol ordinal, ~0 if pszSymbol should be used.
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211 | * @param pValue Where to store the symbol value (address).
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212 | * @param pvUser User argument.
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213 | */
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214 | static DECLCALLBACK(int) testGetImport(RTLDRMOD hLdrMod, const char *pszModule, const char *pszSymbol,
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215 | unsigned uSymbol, RTUINTPTR *pValue, void *pvUser)
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216 | {
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217 | RT_NOREF5(hLdrMod, pszModule, pszSymbol, uSymbol, pvUser);
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218 | RTUINTPTR BaseAddr = *(PCRTUINTPTR)pvUser;
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219 | if (g_fNearImports)
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220 | *pValue = BaseAddr + UINT32_C(0x604020f0);
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221 | else if ( BaseAddr < UINT64_C(0xffffff7f820df000) - _4G
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222 | || BaseAddr > UINT64_C(0xffffff7f820df000) + _4G)
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223 | *pValue = UINT64_C(0xffffff7f820df000);
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224 | else
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225 | *pValue = UINT64_C(0xffffff7c820df000);
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226 | if (g_cBits == 32)
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227 | *pValue &= UINT32_MAX;
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228 | return VINF_SUCCESS;
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229 | }
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230 |
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231 | static uint32_t g_iSegNo = 0;
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232 | static DECLCALLBACK(int) testEnumSegment1(RTLDRMOD hLdrMod, PCRTLDRSEG pSeg, void *pvUser)
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233 | {
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234 | if (hLdrMod != g_hLdrMod || pvUser != NULL)
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235 | return VERR_INTERNAL_ERROR_3;
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236 | RTPrintf("Seg#%02u: %RTptr LB %RTptr %s\n"
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237 | " link=%RTptr LB %RTptr align=%RTptr fProt=%#x offFile=%RTfoff\n"
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238 | , g_iSegNo++, pSeg->RVA, pSeg->cbMapped, pSeg->pszName,
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239 | pSeg->LinkAddress, pSeg->cb, pSeg->Alignment, pSeg->fProt, pSeg->offFile);
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240 |
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241 | return VINF_SUCCESS;
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242 | }
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243 |
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244 |
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245 | /**
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246 | * Enumeration callback function used by RTLdrEnumSymbols().
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247 | *
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248 | * @returns iprt status code. Failure will stop the enumeration.
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249 | * @param hLdrMod The loader module handle.
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250 | * @param pszSymbol Symbol name. NULL if ordinal only.
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251 | * @param uSymbol Symbol ordinal, ~0 if not used.
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252 | * @param Value Symbol value.
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253 | * @param pvUser The user argument specified to RTLdrEnumSymbols().
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254 | */
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255 | static DECLCALLBACK(int) testEnumSymbol1(RTLDRMOD hLdrMod, const char *pszSymbol, unsigned uSymbol, RTUINTPTR Value, void *pvUser)
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256 | {
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257 | if (hLdrMod != g_hLdrMod || pvUser != NULL)
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258 | return VERR_INTERNAL_ERROR_3;
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259 | RTPrintf(" %RTptr %s (%d)\n", Value, pszSymbol, uSymbol);
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260 | return VINF_SUCCESS;
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261 | }
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262 |
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263 |
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264 | static int testDisasNear(uint64_t uAddr)
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265 | {
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266 | TESTNEARSYM NearSym;
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267 | int rc = FindNearSymbol(uAddr, &NearSym);
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268 | if (RT_FAILURE(rc))
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269 | return rc;
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270 |
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271 | RTPrintf("tstLdr-3: Addr=%RTptr\n"
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272 | "%RTptr %s (%d) - %RTptr %s (%d)\n",
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273 | NearSym.Addr,
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274 | NearSym.aSyms[0].Value, NearSym.aSyms[0].szName, NearSym.aSyms[0].uSymbol,
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275 | NearSym.aSyms[1].Value, NearSym.aSyms[1].szName, NearSym.aSyms[1].uSymbol);
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276 | if (NearSym.Addr - NearSym.aSyms[0].Value < 0x10000)
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277 | {
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278 | DISCPUMODE enmDisCpuMode = g_cBits == 32 ? DISCPUMODE_32BIT : DISCPUMODE_64BIT;
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279 | uint8_t *pbCode = (uint8_t *)g_pvBits + (NearSym.aSyms[0].Value - g_uLoadAddr);
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280 | MyDisBlock(enmDisCpuMode, (uintptr_t)pbCode,
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281 | RT_MAX(NearSym.aSyms[1].Value - NearSym.aSyms[0].Value, 0x20000),
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282 | NearSym.aSyms[0].Value - (uintptr_t)pbCode,
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283 | NearSym.aSyms[0].Value,
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284 | NearSym.Addr);
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285 | }
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286 |
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287 | return VINF_SUCCESS;
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288 | }
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289 |
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290 | int main(int argc, char **argv)
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291 | {
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292 | RTR3InitExe(argc, &argv, 0);
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293 |
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294 | /*
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295 | * Module & code bitness (optional).
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296 | */
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297 | g_cBits = ARCH_BITS;
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298 | #if !defined(RT_OS_WINDOWS) || defined(RT_OS_DARWIN)
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299 | g_fNearImports = false;
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300 | #else
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301 | g_fNearImports = true;
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302 | #endif
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303 | while (argc > 1)
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304 | {
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305 | if (!strcmp(argv[1], "--32"))
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306 | g_cBits = 32;
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307 | else if (!strcmp(argv[1], "--64"))
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308 | g_cBits = 64;
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309 | else if (!strcmp(argv[1], "--near-imports"))
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310 | g_fNearImports = true;
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311 | else if (!strcmp(argv[1], "--wide-imports"))
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312 | g_fNearImports = false;
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313 | else
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314 | break;
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315 | argc--;
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316 | argv++;
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317 | }
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318 |
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319 | int rcRet = 0;
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320 | if (argc <= 2)
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321 | {
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322 | RTPrintf("usage: %s [--32|--64] [--<near|wide>-imports] <load-addr> <module> [addr1 []]\n", argv[0]);
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323 | return 1;
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324 | }
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325 |
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326 | /*
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327 | * Load the module.
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328 | */
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329 | RTERRINFOSTATIC ErrInfo;
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330 | g_uLoadAddr = (RTUINTPTR)RTStrToUInt64(argv[1]);
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331 | int rc = RTLdrOpenEx(argv[2], 0, RTLDRARCH_WHATEVER, &g_hLdrMod, RTErrInfoInitStatic(&ErrInfo));
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332 | if (RT_FAILURE(rc))
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333 | {
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334 | RTPrintf("tstLdr-3: Failed to open '%s': %Rra\n", argv[2], rc);
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335 | if (ErrInfo.szMsg[0])
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336 | RTPrintf("tstLdr-3: %s\n", ErrInfo.szMsg);
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337 | return 1;
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338 | }
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339 |
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340 | g_pvBits = RTMemAlloc(RTLdrSize(g_hLdrMod));
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341 | rc = RTLdrGetBits(g_hLdrMod, g_pvBits, g_uLoadAddr, testGetImport, &g_uLoadAddr);
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342 | if (RT_SUCCESS(rc))
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343 | {
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344 | if ( argc == 4
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345 | && argv[3][0] == '*')
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346 | {
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347 | /*
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348 | * Wildcard address mode.
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349 | */
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350 | uint64_t uWild = RTStrToUInt64(&argv[3][1]);
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351 | uint64_t uIncrements = strchr(argv[3], '/') ? RTStrToUInt64(strchr(argv[3], '/') + 1) : 0x1000;
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352 | if (!uIncrements)
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353 | uIncrements = 0x1000;
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354 | uint64_t uMax = RTLdrSize(g_hLdrMod) + g_uLoadAddr;
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355 | for (uint64_t uCur = g_uLoadAddr + uWild; uCur < uMax; uCur += uIncrements)
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356 | testDisasNear(uCur);
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357 | }
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358 | else if (argc > 3)
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359 | {
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360 | /*
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361 | * User specified addresses within the module.
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362 | */
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363 | for (int i = 3; i < argc; i++)
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364 | {
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365 | rc = testDisasNear(RTStrToUInt64(argv[i]));
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366 | if (RT_FAILURE(rc))
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367 | rcRet++;
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368 | }
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369 | }
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370 | else
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371 | {
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372 | /*
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373 | * Enumerate symbols.
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374 | */
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375 | rc = RTLdrEnumSymbols(g_hLdrMod, RTLDR_ENUM_SYMBOL_FLAGS_ALL, g_pvBits, g_uLoadAddr, testEnumSymbol1, NULL);
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376 | if (RT_FAILURE(rc))
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377 | {
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378 | RTPrintf("tstLdr-3: Failed to enumerate symbols: %Rra\n", rc);
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379 | rcRet++;
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380 | }
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381 |
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382 | /*
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383 | * Query various properties.
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384 | */
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385 | union
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386 | {
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387 | char szName[256];
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388 | uint32_t iImpModule;
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389 | RTUUID Uuid;
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390 | } uBuf;
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391 | rc = RTLdrQueryProp(g_hLdrMod, RTLDRPROP_INTERNAL_NAME, &uBuf, sizeof(uBuf));
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392 | if (RT_SUCCESS(rc))
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393 | RTPrintf("tstLdr-3: Internal name: %s\n", uBuf.szName);
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394 | else if (rc != VERR_NOT_FOUND && rc != VERR_NOT_SUPPORTED)
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395 | {
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396 | RTPrintf("tstLdr-3: Internal name: failed - %Rrc\n", rc);
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397 | rcRet++;
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398 | }
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399 |
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400 | uint32_t cImports = 0;
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401 | rc = RTLdrQueryProp(g_hLdrMod, RTLDRPROP_IMPORT_COUNT, &cImports, sizeof(cImports));
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402 | if (RT_SUCCESS(rc))
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403 | {
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404 | RTPrintf("tstLdr-3: Import count: %u\n", cImports);
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405 | for (uint32_t i = 0; i < cImports; i++)
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406 | {
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407 | uBuf.iImpModule = i;
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408 | rc = RTLdrQueryProp(g_hLdrMod, RTLDRPROP_IMPORT_MODULE, &uBuf, sizeof(uBuf));
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409 | if (RT_SUCCESS(rc))
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410 | RTPrintf("tstLdr-3: Import module #%u: %s\n", i, uBuf.szName);
|
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411 | else
|
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412 | {
|
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413 | RTPrintf("tstLdr-3: Import module #%u: failed - %Rrc\n", i, rc);
|
---|
414 | rcRet++;
|
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415 | }
|
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416 | }
|
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417 | }
|
---|
418 | else if (rc != VERR_NOT_FOUND && rc != VERR_NOT_SUPPORTED)
|
---|
419 | {
|
---|
420 | RTPrintf("tstLdr-3: Import count: failed - %Rrc\n", rc);
|
---|
421 | rcRet++;
|
---|
422 | }
|
---|
423 |
|
---|
424 | rc = RTLdrQueryProp(g_hLdrMod, RTLDRPROP_UUID, &uBuf.Uuid, sizeof(uBuf.Uuid));
|
---|
425 | if (RT_SUCCESS(rc))
|
---|
426 | RTPrintf("tstLdr-3: UUID: %RTuuid\n", uBuf.Uuid);
|
---|
427 | else if (rc != VERR_NOT_FOUND && rc != VERR_NOT_SUPPORTED)
|
---|
428 | {
|
---|
429 | RTPrintf("tstLdr-3: UUID: failed - %Rrc\n", rc);
|
---|
430 | rcRet++;
|
---|
431 | }
|
---|
432 |
|
---|
433 | /*
|
---|
434 | * Enumerate segments.
|
---|
435 | */
|
---|
436 | RTPrintf("tstLdr-3: Segments:\n");
|
---|
437 | rc = RTLdrEnumSegments(g_hLdrMod, testEnumSegment1, NULL);
|
---|
438 | if (RT_FAILURE(rc))
|
---|
439 | {
|
---|
440 | RTPrintf("tstLdr-3: Failed to enumerate symbols: %Rra\n", rc);
|
---|
441 | rcRet++;
|
---|
442 | }
|
---|
443 | }
|
---|
444 | }
|
---|
445 | else
|
---|
446 | {
|
---|
447 | RTPrintf("tstLdr-3: Failed to get bits for '%s' at %RTptr: %Rra\n", argv[2], g_uLoadAddr, rc);
|
---|
448 | rcRet++;
|
---|
449 | }
|
---|
450 | RTMemFree(g_pvBits);
|
---|
451 | RTLdrClose(g_hLdrMod);
|
---|
452 |
|
---|
453 | /*
|
---|
454 | * Test result summary.
|
---|
455 | */
|
---|
456 | if (!rcRet)
|
---|
457 | RTPrintf("tstLdr-3: SUCCESS\n");
|
---|
458 | else
|
---|
459 | RTPrintf("tstLdr-3: FAILURE - %d errors\n", rcRet);
|
---|
460 | return !!rcRet;
|
---|
461 | }
|
---|