1 | /* $Id: ldrNative-win.cpp 57358 2015-08-14 15:16:38Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - Binary Image Loader, Win32 native.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2015 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 | #define LOG_GROUP RTLOGGROUP_LDR
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32 | #include <Windows.h>
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33 |
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34 | #include <iprt/ldr.h>
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35 | #include "internal/iprt.h"
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36 |
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37 | #include <iprt/alloca.h>
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38 | #include <iprt/assert.h>
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39 | #include <iprt/err.h>
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40 | #include <iprt/file.h>
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41 | #include <iprt/log.h>
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42 | #include <iprt/path.h>
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43 | #include <iprt/string.h>
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44 |
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45 | #include <iprt/once.h>
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46 | #include <iprt/string.h>
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47 | #include "internal/ldr.h"
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48 |
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49 | #ifndef LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR
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50 | # define LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR UINT32_C(0x100)
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51 | # define LOAD_LIBRARY_SEARCH_APPLICATION_DIR UINT32_C(0x200)
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52 | # define LOAD_LIBRARY_SEARCH_SYSTEM32 UINT32_C(0x800)
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53 | #endif
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54 |
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55 |
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56 | int rtldrNativeLoad(const char *pszFilename, uintptr_t *phHandle, uint32_t fFlags, PRTERRINFO pErrInfo)
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57 | {
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58 | Assert(sizeof(*phHandle) >= sizeof(HMODULE));
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59 | AssertReturn(!(fFlags & RTLDRLOAD_FLAGS_GLOBAL), VERR_INVALID_FLAGS);
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60 | AssertLogRelMsgReturn(RTPathStartsWithRoot(pszFilename), /* Relative names will still be applied to the search path. */
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61 | ("pszFilename='%s'\n", pszFilename),
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62 | VERR_INTERNAL_ERROR_2);
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63 |
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64 | /*
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65 | * Convert to UTF-16 and make sure it got a .DLL suffix.
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66 | */
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67 | int rc;
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68 | RTUTF16 *pwszNative = NULL;
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69 | if (RTPathHasSuffix(pszFilename))
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70 | rc = RTStrToUtf16(pszFilename, &pwszNative);
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71 | else
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72 | {
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73 | size_t cwcAlloc;
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74 | rc = RTStrCalcUtf16LenEx(pszFilename, RTSTR_MAX, &cwcAlloc);
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75 | if (RT_SUCCESS(rc))
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76 | {
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77 | cwcAlloc += sizeof(".DLL");
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78 | pwszNative = RTUtf16Alloc(cwcAlloc * sizeof(RTUTF16));
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79 | if (pwszNative)
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80 | {
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81 | size_t cwcNative;
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82 | rc = RTStrToUtf16Ex(pszFilename, RTSTR_MAX, &pwszNative, cwcAlloc, &cwcNative);
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83 | if (RT_SUCCESS(rc))
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84 | rc = RTUtf16CopyAscii(&pwszNative[cwcNative], cwcAlloc - cwcNative, ".DLL");
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85 | }
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86 | else
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87 | rc = VERR_NO_UTF16_MEMORY;
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88 | }
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89 | }
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90 | if (RT_SUCCESS(rc))
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91 | {
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92 | /*
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93 | * Attempt load.
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94 | */
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95 | HMODULE hmod;
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96 | static int s_iSearchDllLoadDirSupported = 0;
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97 | if ( !(fFlags & RTLDRLOAD_FLAGS_NT_SEARCH_DLL_LOAD_DIR)
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98 | || s_iSearchDllLoadDirSupported < 0)
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99 | hmod = LoadLibraryExW(pwszNative, NULL, 0);
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100 | else
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101 | {
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102 | hmod = LoadLibraryExW(pwszNative, NULL, LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR | LOAD_LIBRARY_SEARCH_SYSTEM32
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103 | | LOAD_LIBRARY_SEARCH_APPLICATION_DIR);
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104 | if (s_iSearchDllLoadDirSupported == 0)
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105 | {
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106 | if (hmod != NULL || GetLastError() != ERROR_INVALID_PARAMETER)
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107 | s_iSearchDllLoadDirSupported = 1;
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108 | else
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109 | {
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110 | s_iSearchDllLoadDirSupported = -1;
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111 | hmod = LoadLibraryExW(pwszNative, NULL, 0);
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112 | }
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113 | }
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114 | }
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115 | if (hmod)
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116 | {
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117 | *phHandle = (uintptr_t)hmod;
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118 | RTUtf16Free(pwszNative);
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119 | return VINF_SUCCESS;
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120 | }
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121 |
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122 | /*
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123 | * Try figure why it failed to load.
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124 | */
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125 | DWORD dwErr = GetLastError();
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126 | rc = RTErrConvertFromWin32(dwErr);
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127 | rc = RTErrInfoSetF(pErrInfo, rc, "GetLastError=%u", dwErr);
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128 | }
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129 | else
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130 | rc = RTErrInfoSetF(pErrInfo, rc, "Error converting UTF-8 to UTF-16 string.");
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131 | RTUtf16Free(pwszNative);
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132 | return rc;
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133 | }
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134 |
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135 |
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136 | DECLCALLBACK(int) rtldrNativeGetSymbol(PRTLDRMODINTERNAL pMod, const char *pszSymbol, void **ppvValue)
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137 | {
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138 | PRTLDRMODNATIVE pModNative = (PRTLDRMODNATIVE)pMod;
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139 | FARPROC pfn = GetProcAddress((HMODULE)pModNative->hNative, pszSymbol);
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140 | if (pfn)
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141 | {
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142 | *ppvValue = (void *)pfn;
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143 | return VINF_SUCCESS;
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144 | }
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145 | *ppvValue = NULL;
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146 | return RTErrConvertFromWin32(GetLastError());
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147 | }
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148 |
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149 |
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150 | DECLCALLBACK(int) rtldrNativeClose(PRTLDRMODINTERNAL pMod)
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151 | {
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152 | PRTLDRMODNATIVE pModNative = (PRTLDRMODNATIVE)pMod;
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153 | if ( (pModNative->fFlags & RTLDRLOAD_FLAGS_NO_UNLOAD)
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154 | || FreeLibrary((HMODULE)pModNative->hNative))
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155 | {
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156 | pModNative->hNative = (uintptr_t)INVALID_HANDLE_VALUE;
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157 | return VINF_SUCCESS;
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158 | }
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159 | return RTErrConvertFromWin32(GetLastError());
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160 | }
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161 |
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162 |
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163 | int rtldrNativeLoadSystem(const char *pszFilename, const char *pszExt, uint32_t fFlags, PRTLDRMOD phLdrMod)
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164 | {
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165 | /*
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166 | * We only try the System32 directory.
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167 | */
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168 | WCHAR wszSysDir[MAX_PATH];
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169 | UINT cwcSysDir = GetSystemDirectoryW(wszSysDir, MAX_PATH);
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170 | if (cwcSysDir >= MAX_PATH)
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171 | return VERR_FILENAME_TOO_LONG;
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172 |
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173 | char szPath[RTPATH_MAX];
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174 | char *pszPath = szPath;
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175 | int rc = RTUtf16ToUtf8Ex(wszSysDir, RTSTR_MAX, &pszPath, sizeof(szPath), NULL);
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176 | if (RT_SUCCESS(rc))
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177 | {
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178 | rc = RTPathAppend(szPath, sizeof(szPath), pszFilename);
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179 | if (pszExt && RT_SUCCESS(rc))
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180 | rc = RTStrCat(szPath, sizeof(szPath), pszExt);
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181 | if (RT_SUCCESS(rc))
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182 | {
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183 | if (RTFileExists(szPath))
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184 | rc = RTLdrLoadEx(szPath, phLdrMod, fFlags, NULL);
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185 | else
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186 | rc = VERR_MODULE_NOT_FOUND;
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187 | }
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188 | }
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189 |
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190 | return rc;
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191 | }
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192 |
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