1 | /* $Id: tstLdr.cpp 16933 2009-02-18 23:42:57Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - Testcase for parts of RTLdr*.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2007 Sun Microsystems, Inc.
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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 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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27 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
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28 | * additional information or have any questions.
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29 | */
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30 |
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31 |
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32 | /*******************************************************************************
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33 | * Header Files *
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34 | *******************************************************************************/
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35 | #include <iprt/ldr.h>
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36 | #include <iprt/alloc.h>
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37 | #include <iprt/stream.h>
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38 | #include <iprt/assert.h>
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39 | #include <iprt/initterm.h>
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40 | #include <iprt/err.h>
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41 | #include <iprt/string.h>
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42 |
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43 |
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44 | /*******************************************************************************
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45 | * Global Variables *
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46 | *******************************************************************************/
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47 | /** If set, don't bitch when failing to resolve symbols. */
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48 | static bool g_fDontBitchOnResolveFailure = false;
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49 | /** Whether it's kernel model code or not.. */
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50 | static bool g_fKernel = true;
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51 | /** Module architectur bit count. */
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52 | static uint32_t g_cBits = HC_ARCH_BITS;
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53 |
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54 |
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55 | /**
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56 | * Resolve an external symbol during RTLdrGetBits().
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57 | *
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58 | * @returns iprt status code.
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59 | * @param hLdrMod The loader module handle.
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60 | * @param pszModule Module name.
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61 | * @param pszSymbol Symbol name, NULL if uSymbol should be used.
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62 | * @param uSymbol Symbol ordinal, ~0 if pszSymbol should be used.
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63 | * @param pValue Where to store the symbol value (address).
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64 | * @param pvUser User argument.
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65 | */
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66 | static DECLCALLBACK(int) testGetImport(RTLDRMOD hLdrMod, const char *pszModule, const char *pszSymbol, unsigned uSymbol, RTUINTPTR *pValue, void *pvUser)
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67 | {
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68 | /* check the name format and only permit certain names... later, right? */
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69 |
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70 | if (g_cBits == 32)
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71 | *pValue = 0xabcdef0f;
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72 | else
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73 | {
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74 | RTUINTPTR BaseAddr = *(PCRTUINTPTR)pvUser;
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75 | if (g_fKernel)
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76 | *pValue = BaseAddr & RT_BIT(31) ? -(int32_t)0x76634935 : 0x7f304938;
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77 | else
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78 | *pValue = (int32_t)0x76634935 * ((BaseAddr >> 8) & 7);
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79 | }
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80 | return VINF_SUCCESS;
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81 | }
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82 |
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83 |
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84 | /**
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85 | * One test iteration with one file.
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86 | *
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87 | * The test is very simple, we load the file three times
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88 | * into two different regions. The first two into each of the
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89 | * regions the for compare usage. The third is loaded into one
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90 | * and then relocated between the two and other locations a few times.
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91 | *
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92 | * @returns number of errors.
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93 | * @param pszFilename The file to load the mess with.
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94 | */
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95 | static int testLdrOne(const char *pszFilename)
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96 | {
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97 | int rcRet = 0;
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98 | size_t cbImage = 0;
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99 | struct Load
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100 | {
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101 | RTLDRMOD hLdrMod;
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102 | void *pvBits;
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103 | RTUINTPTR Addr;
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104 | const char *pszName;
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105 | } aLoads[6] =
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106 | {
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107 | { NULL, NULL, (int32_t)0xefefef00, "foo" },
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108 | { NULL, NULL, (int32_t)0x40404040, "bar" },
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109 | { NULL, NULL, (int32_t)0xefefef00, "foobar" },
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110 | { NULL, NULL, (int32_t)0xefefef00, "kLdr-foo" },
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111 | { NULL, NULL, (int32_t)0x40404040, "kLdr-bar" },
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112 | { NULL, NULL, (int32_t)0xefefef00, "kLdr-foobar" }
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113 | };
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114 | unsigned i;
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115 |
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116 | /*
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117 | * Load them.
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118 | */
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119 | for (i = 0; i < RT_ELEMENTS(aLoads); i++)
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120 | {
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121 | /* adjust load address and announce our intentions */
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122 | if (g_cBits == 32)
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123 | aLoads[i].Addr &= UINT32_C(0xffffffff);
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124 | RTPrintf("tstLdr: Loading image at %RTptr\n", aLoads[i].Addr);
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125 |
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126 | /* open it */
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127 | int rc;
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128 | if (!strncmp(aLoads[i].pszName, "kLdr-", sizeof("kLdr-") - 1))
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129 | rc = RTLdrOpenkLdr(pszFilename, 0, RTLDRARCH_WHATEVER, &aLoads[i].hLdrMod);
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130 | else
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131 | rc = RTLdrOpen(pszFilename, 0, RTLDRARCH_WHATEVER, &aLoads[i].hLdrMod);
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132 | if (RT_FAILURE(rc))
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133 | {
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134 | RTPrintf("tstLdr: Failed to open '%s'/%d, rc=%Rrc. aborting test.\n", pszFilename, i, rc);
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135 | Assert(aLoads[i].hLdrMod == NIL_RTLDRMOD);
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136 | rcRet++;
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137 | break;
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138 | }
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139 |
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140 | /* size it */
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141 | size_t cb = RTLdrSize(aLoads[i].hLdrMod);
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142 | if (cbImage && cb != cbImage)
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143 | {
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144 | RTPrintf("tstLdr: Size mismatch '%s'/%d. aborting test.\n", pszFilename, i);
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145 | rcRet++;
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146 | break;
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147 | }
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148 | cbImage = cb;
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149 |
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150 | /* Allocate bits. */
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151 | aLoads[i].pvBits = RTMemAlloc(cb);
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152 | if (!aLoads[i].pvBits)
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153 | {
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154 | RTPrintf("tstLdr: Out of memory '%s'/%d cbImage=%d. aborting test.\n", pszFilename, i, cbImage);
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155 | rcRet++;
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156 | break;
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157 | }
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158 |
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159 | /* Get the bits. */
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160 | rc = RTLdrGetBits(aLoads[i].hLdrMod, aLoads[i].pvBits, aLoads[i].Addr, testGetImport, &aLoads[i].Addr);
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161 | if (RT_FAILURE(rc))
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162 | {
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163 | RTPrintf("tstLdr: Failed to get bits for '%s'/%d, rc=%Rrc. aborting test\n", pszFilename, i, rc);
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164 | rcRet++;
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165 | break;
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166 | }
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167 | }
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168 |
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169 | /*
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170 | * Continue with the relocations and symbol resolving.
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171 | */
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172 | if (!rcRet)
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173 | {
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174 | static RTUINTPTR aRels[] =
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175 | {
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176 | (int32_t)0xefefef00, /* same. */
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177 | (int32_t)0x40404040, /* the other. */
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178 | (int32_t)0xefefef00, /* back. */
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179 | (int32_t)0x40404040, /* the other. */
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180 | (int32_t)0xefefef00, /* back again. */
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181 | (int32_t)0x77773420, /* somewhere entirely else. */
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182 | (int32_t)0xf0000000, /* somewhere entirely else. */
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183 | (int32_t)0x40404040, /* the other. */
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184 | (int32_t)0xefefef00 /* back again. */
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185 | };
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186 | struct Symbols
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187 | {
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188 | /** The symbol offset. -1 indicates the first time. */
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189 | unsigned off;
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190 | /** The symbol name. */
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191 | const char *pszName;
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192 | } aSyms[] =
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193 | {
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194 | { ~0, "Entrypoint" },
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195 | { ~0, "SomeExportFunction1" },
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196 | { ~0, "SomeExportFunction2" },
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197 | { ~0, "SomeExportFunction3" },
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198 | { ~0, "SomeExportFunction4" },
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199 | { ~0, "SomeExportFunction5" },
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200 | { ~0, "SomeExportFunction5" },
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201 | { ~0, "DISCoreOne" }
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202 | };
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203 |
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204 | unsigned iRel = 0;
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205 | for (;;)
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206 | {
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207 | /* adjust load address and announce our intentions */
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208 | if (g_cBits == 32)
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209 | aRels[iRel] &= UINT32_C(0xffffffff);
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210 |
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211 | /* Compare all which are at the same address. */
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212 | for (i = 0; i < RT_ELEMENTS(aLoads) - 1; i++)
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213 | {
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214 | for (unsigned j = i + 1; j < RT_ELEMENTS(aLoads); j++)
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215 | {
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216 | if (aLoads[j].Addr == aLoads[i].Addr)
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217 | {
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218 | if (memcmp(aLoads[j].pvBits, aLoads[i].pvBits, cbImage))
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219 | {
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220 | RTPrintf("tstLdr: Mismatch between load %d and %d. ('%s')\n", j, i, pszFilename);
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221 | #if 1
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222 | const uint8_t *pu8J = (const uint8_t *)aLoads[j].pvBits;
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223 | const uint8_t *pu8I = (const uint8_t *)aLoads[i].pvBits;
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224 | for (uint32_t off = 0; off < cbImage; off++, pu8J++, pu8I++)
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225 | if (*pu8J != *pu8I)
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226 | RTPrintf(" %08x %02x != %02x\n", off, *pu8J, *pu8I);
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227 | #else
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228 | const uint32_t *pu32J = (const uint32_t *)aLoads[j].pvBits;
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229 | const uint32_t *pu32I = (const uint32_t *)aLoads[i].pvBits;
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230 | for (uint32_t off = 0; off < cbImage; off += 4, pu32J++, pu32I++)
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231 | if (*pu32J != *pu32I)
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232 | RTPrintf(" %08x %08x != %08x\n", off, *pu32J, *pu32I);
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233 | #endif
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234 | rcRet++;
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235 | break;
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236 | }
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237 | }
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238 | }
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239 | }
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240 |
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241 | /* compare symbols. */
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242 | for (i = 0; i < RT_ELEMENTS(aLoads); i++)
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243 | {
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244 | for (unsigned iSym = 0; iSym < RT_ELEMENTS(aSyms); iSym++)
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245 | {
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246 | RTUINTPTR Value;
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247 | int rc = RTLdrGetSymbolEx(aLoads[i].hLdrMod, aLoads[i].pvBits, aLoads[i].Addr, aSyms[iSym].pszName, &Value);
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248 | if (RT_SUCCESS(rc))
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249 | {
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250 | unsigned off = Value - aLoads[i].Addr;
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251 | if (off < cbImage)
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252 | {
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253 | if (aSyms[iSym].off == ~0U)
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254 | aSyms[iSym].off = off;
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255 | else if (off != aSyms[iSym].off)
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256 | {
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257 | RTPrintf("tstLdr: Mismatching symbol '%s' in '%s'/%d. expected off=%d got %d\n",
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258 | aSyms[iSym].pszName, pszFilename, i, aSyms[iSym].off, off);
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259 | rcRet++;
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260 | }
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261 | }
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262 | else
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263 | {
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264 | RTPrintf("tstLdr: Invalid value for symbol '%s' in '%s'/%d. off=%#x Value=%#x\n",
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265 | aSyms[iSym].pszName, pszFilename, i, off, Value);
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266 | rcRet++;
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267 | }
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268 | }
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269 | else if (!g_fDontBitchOnResolveFailure)
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270 | {
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271 | RTPrintf("tstLdr: Failed to resolve symbol '%s' in '%s'/%d.\n", aSyms[iSym].pszName, pszFilename, i);
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272 | rcRet++;
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273 | }
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274 | }
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275 | }
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276 |
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277 | if (iRel >= RT_ELEMENTS(aRels))
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278 | break;
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279 |
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280 | /* relocate it stuff. */
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281 | RTPrintf("tstLdr: Relocating image 2 from %RTptr to %RTptr\n", aLoads[2].Addr, aRels[iRel]);
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282 | int rc = RTLdrRelocate(aLoads[2].hLdrMod, aLoads[2].pvBits, aRels[iRel], aLoads[2].Addr, testGetImport, &aRels[iRel]);
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283 | if (RT_FAILURE(rc))
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284 | {
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285 | RTPrintf("tstLdr: Relocate of '%s' from %#x to %#x failed, rc=%Rrc. Aborting test.\n",
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286 | pszFilename, aRels[iRel], aLoads[2].Addr, rc);
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287 | rcRet++;
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288 | break;
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289 | }
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290 | aLoads[2].Addr = aRels[iRel];
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291 |
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292 | /* next */
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293 | iRel++;
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294 | }
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295 | }
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296 |
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297 | /*
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298 | * Clean up.
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299 | */
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300 | for (i = 0; i < RT_ELEMENTS(aLoads); i++)
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301 | {
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302 | if (aLoads[i].pvBits)
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303 | RTMemFree(aLoads[i].pvBits);
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304 | if (aLoads[i].hLdrMod)
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305 | {
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306 | int rc = RTLdrClose(aLoads[i].hLdrMod);
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307 | if (RT_FAILURE(rc))
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308 | {
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309 | RTPrintf("tstLdr: Failed to close '%s' i=%d, rc=%Rrc.\n", pszFilename, i, rc);
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310 | rcRet++;
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311 | }
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312 | }
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313 | }
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314 |
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315 | return rcRet;
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316 | }
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317 |
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318 |
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319 |
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320 | int main(int argc, char **argv)
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321 | {
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322 | RTR3Init();
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323 |
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324 | int rcRet = 0;
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325 | if (argc <= 1)
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326 | {
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327 | RTPrintf("usage: %s [-32|-64] [-kernel] <module> [more options/modules]\n", argv[0]);
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328 | return 1;
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329 | }
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330 |
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331 | /*
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332 | * Iterate the files.
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333 | */
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334 | for (int argi = 1; argi < argc; argi++)
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335 | {
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336 | if (!strcmp(argv[argi], "-n"))
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337 | g_fDontBitchOnResolveFailure = true;
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338 | else if (!strcmp(argv[argi], "-32"))
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339 | g_cBits = 32;
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340 | else if (!strcmp(argv[argi], "-64"))
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341 | g_cBits = 64;
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342 | else if (!strcmp(argv[argi], "-kernel"))
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343 | g_fKernel = 64;
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344 | else
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345 | {
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346 | RTPrintf("tstLdr: TESTING '%s'...\n", argv[argi]);
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347 | rcRet += testLdrOne(argv[argi]);
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348 | }
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349 | }
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350 |
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351 | /*
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352 | * Test result summary.
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353 | */
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354 | if (!rcRet)
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355 | RTPrintf("tstLdr: SUCCESS\n");
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356 | else
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357 | RTPrintf("tstLdr: FAILURE - %d errors\n", rcRet);
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358 | return !!rcRet;
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359 | }
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