1 | /* $Id: preload.cpp 69500 2017-10-28 15:14:05Z vboxsync $ */
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2 | /** @file
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3 | * bin2c - Binary 2 C Structure Converter.
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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 |
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18 |
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19 | /*********************************************************************************************************************************
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20 | * Header Files *
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21 | *********************************************************************************************************************************/
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22 | #ifdef RT_OS_WINDOWS
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23 | # include <Windows.h>
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24 | #else
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25 | # include <sys/mman.h>
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26 | # include <sys/stat.h>
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27 | # include <fcntl.h>
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28 | # include <unistd.h>
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29 | # include <errno.h>
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30 | #endif
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31 | #include <stdio.h>
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32 | #include <string.h>
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33 |
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34 |
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35 | static int load(const char *pszImage)
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36 | {
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37 | #ifdef RT_OS_WINDOWS
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38 | HANDLE hFile = CreateFile(pszImage,
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39 | GENERIC_READ,
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40 | FILE_SHARE_READ,
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41 | NULL /*pSecurityAttributes*/,
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42 | OPEN_EXISTING,
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43 | FILE_ATTRIBUTE_NORMAL,
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44 | NULL /*hTemplateFile*/);
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45 | if (hFile == INVALID_HANDLE_VALUE)
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46 | {
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47 | printf("error: CreateFile('%s',): %d\n", pszImage, GetLastError());
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48 | return 1;
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49 | }
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50 |
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51 | DWORD cbHigh = 0;
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52 | DWORD cbLow = GetFileSize(hFile, &cbHigh);
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53 | size_t cbFile = cbLow != INVALID_FILE_SIZE
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54 | ? cbHigh == 0
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55 | ? cbLow
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56 | : ~(DWORD)0 / 4
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57 | : 64;
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58 |
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59 | HANDLE hMap = CreateFileMapping(hFile,
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60 | NULL /*pAttributes*/,
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61 | PAGE_READONLY | SEC_COMMIT,
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62 | 0 /*dwMaximumSizeHigh -> file size*/,
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63 | 0 /*dwMaximumSizeLow -> file size*/,
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64 | NULL /*pName*/);
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65 | if (hMap == INVALID_HANDLE_VALUE)
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66 | printf("error: CreateFile('%s',): %d\n", pszImage, GetLastError());
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67 | CloseHandle(hFile);
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68 | if (hMap == INVALID_HANDLE_VALUE)
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69 | return 1;
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70 |
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71 | void *pvWhere = MapViewOfFile(hMap,
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72 | FILE_MAP_READ,
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73 | 0 /*dwFileOffsetHigh*/,
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74 | 0 /*dwFileOffsetLow*/,
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75 | 0 /*dwNumberOfBytesToMap - file size */);
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76 | if (!pvWhere)
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77 | {
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78 | printf("error: MapViewOfView('%s',): %d\n", pszImage, GetLastError());
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79 | CloseHandle(hMap);
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80 | return 1;
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81 | }
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82 |
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83 | #else
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84 | int fd = open(pszImage, O_RDONLY, 0);
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85 | if (fd < 0)
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86 | {
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87 | printf("error: open('%s',): %d\n", pszImage, errno);
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88 | return 1;
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89 | }
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90 |
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91 | struct stat st;
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92 | memset(&st, 0, sizeof(st));
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93 | if (fstat(fd, &st))
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94 | st.st_size = 64;
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95 | size_t cbFile = st.st_size < ~(size_t)0
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96 | ? (size_t)st.st_size
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97 | : ~(size_t)0 / 4;
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98 |
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99 | void *pvWhere = mmap(NULL /*addr*/, cbFile, PROT_READ, MAP_FILE | MAP_PRIVATE, fd, 0 /*offset*/);
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100 | if (pvWhere == MAP_FAILED)
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101 | printf("error: mmap(,%lu,)/'%s': %d\n", (unsigned long)cbFile, pszImage, errno);
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102 | close(fd);
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103 | if (pvWhere == MAP_FAILED)
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104 | return 1;
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105 |
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106 | #endif
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107 |
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108 | /* Touch the whole image... do a dummy crc to keep the optimizer from begin
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109 | smart with us. */
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110 | unsigned char *puchFile = (unsigned char *)pvWhere;
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111 | size_t off = 0;
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112 | unsigned int uCrc = 0;
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113 | while (off < cbFile)
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114 | uCrc += puchFile[off++];
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115 | printf("info: %p/%#lx/%#x - %s\n", pvWhere, (unsigned long)cbFile, (unsigned char)uCrc, pszImage);
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116 |
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117 | return 0;
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118 | }
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119 |
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120 | static int usage(const char *argv0)
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121 | {
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122 | printf("Generic executable image preloader.\n"
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123 | "Usage: %s [dll|exe|file []]\n", argv0);
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124 | return 1;
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125 | }
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126 |
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127 | int main(int argc, char **argv)
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128 | {
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129 | /*
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130 | * Check for options.
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131 | */
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132 | for (int i = 1; i < argc; i++)
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133 | {
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134 | if (argv[i][0] == '-')
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135 | {
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136 | if ( argv[i][1] == '-'
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137 | && argv[i][2] == '\0')
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138 | break;
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139 | if ( !strcmp(argv[i], "--help")
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140 | || !strcmp(argv[i], "-help")
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141 | || !strcmp(argv[i], "-h")
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142 | || !strcmp(argv[i], "-?"))
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143 | {
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144 | usage(argv[0]);
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145 | return 1;
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146 | }
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147 | if ( !strcmp(argv[i], "--version")
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148 | || !strcmp(argv[i], "-V"))
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149 | {
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150 | printf("$Revision: 69500 $\n");
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151 | return 0;
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152 | }
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153 | fprintf(stderr, "syntax error: unknown option '%s'\n", argv[i]);
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154 | return 1;
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155 | }
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156 | }
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157 | if (argc <= 1)
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158 | return usage(argv[0]);
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159 |
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160 | /*
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161 | * Do the loading.
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162 | */
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163 | for (int i = 1; i < argc; i++)
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164 | {
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165 | if (!strcmp(argv[i], "--"))
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166 | continue;
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167 | if (argv[i][0] == '@')
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168 | {
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169 | FILE *pFile = fopen(&argv[i][1], "r");
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170 | if (pFile)
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171 | {
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172 | char szLine[4096];
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173 | while (fgets(szLine, sizeof(szLine), pFile))
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174 | {
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175 | char *psz = szLine;
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176 | while (*psz == ' ' || *psz == '\t')
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177 | psz++;
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178 | size_t off = strlen(psz);
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179 | while ( off > 0
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180 | && ( psz[off - 1] == ' '
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181 | || psz[off - 1] == '\t'
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182 | || psz[off - 1] == '\n'
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183 | || psz[off - 1] == '\r')
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184 | )
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185 | psz[--off] = '\0';
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186 |
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187 | if (*psz && *psz != '#')
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188 | load(psz);
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189 | }
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190 | fclose(pFile);
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191 | }
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192 | else
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193 | fprintf(stderr, "error: fopen('%s','r'): %d\n", &argv[i][1], errno);
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194 | }
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195 | else
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196 | load(argv[i]);
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197 | }
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198 |
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199 | /*
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200 | * Sleep for ever.
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201 | */
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202 | for (;;)
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203 | {
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204 | #ifdef RT_OS_WINDOWS
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205 | Sleep(3600*1000);
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206 | #else
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207 | sleep(3600);
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208 | #endif
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209 | }
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210 |
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211 | return 0;
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212 | }
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