1 | /* $Id: VBoxDef2LazyLoad.cpp 54141 2015-02-11 14:30:24Z vboxsync $ */
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2 | /** @file
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3 | * VBoxDef2LazyLoad - Lazy Library Loader Generator.
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4 | *
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5 | * @note Only tested on win.amd64 & darwin.amd64.
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6 | */
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7 |
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8 | /*
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9 | * Copyright (C) 2013-2015 Oracle Corporation
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10 | *
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11 | * This file is part of VirtualBox Open Source Edition (OSE), as
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12 | * available from http://www.virtualbox.org. This file is free software;
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13 | * you can redistribute it and/or modify it under the terms of the GNU
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14 | * General Public License (GPL) as published by the Free Software
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15 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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16 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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17 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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18 | */
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19 |
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20 | /*******************************************************************************
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21 | * Header Files *
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22 | *******************************************************************************/
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23 | #include <ctype.h>
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24 | #include <stdio.h>
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25 | #include <string.h>
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26 | #include <stdlib.h>
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27 | #include <iprt/types.h>
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28 |
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29 |
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30 | /*******************************************************************************
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31 | * Structures and Typedefs *
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32 | *******************************************************************************/
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33 | typedef struct MYEXPORT
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34 | {
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35 | struct MYEXPORT *pNext;
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36 | bool fNoName;
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37 | unsigned uOrdinal;
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38 | char szName[1];
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39 | } MYEXPORT;
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40 | typedef MYEXPORT *PMYEXPORT;
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41 |
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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 | /** @name Options
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48 | * @{ */
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49 | static const char *g_pszOutput = NULL;
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50 | static const char *g_pszLibrary = NULL;
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51 | static const char *g_apszInputs[8] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
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52 | static unsigned g_cInputs = 0;
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53 | static bool g_fIgnoreData = true;
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54 | static bool g_fWithExplictLoadFunction = false;
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55 | /** @} */
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56 |
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57 | /** Pointer to the export name list head. */
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58 | static PMYEXPORT g_pExpHead = NULL;
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59 | /** Pointer to the next pointer for insertion. */
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60 | static PMYEXPORT *g_ppExpNext = &g_pExpHead;
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61 |
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62 |
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63 |
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64 | static const char *leftStrip(const char *psz)
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65 | {
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66 | while (isspace(*psz))
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67 | psz++;
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68 | return psz;
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69 | }
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70 |
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71 |
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72 | static char *leftStrip(char *psz)
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73 | {
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74 | while (isspace(*psz))
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75 | psz++;
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76 | return psz;
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77 | }
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78 |
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79 |
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80 | static unsigned wordLength(const char *pszWord)
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81 | {
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82 | unsigned off = 0;
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83 | char ch;
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84 | while ( (ch = pszWord[off]) != '\0'
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85 | && ch != '='
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86 | && ch != ','
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87 | && ch != ':'
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88 | && !isspace(ch) )
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89 | off++;
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90 | return off;
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91 | }
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92 |
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93 |
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94 | /**
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95 | * Parses the module definition file, collecting export information.
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96 | *
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97 | * @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE, in the latter case full
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98 | * details has been displayed.
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99 | * @param pInput The input stream.
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100 | */
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101 | static RTEXITCODE parseInputInner(FILE *pInput, const char *pszInput)
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102 | {
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103 | /*
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104 | * Process the file line-by-line.
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105 | */
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106 | bool fInExports = false;
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107 | unsigned iLine = 0;
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108 | char szLine[16384];
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109 | while (fgets(szLine, sizeof(szLine), pInput))
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110 | {
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111 | iLine++;
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112 |
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113 | /*
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114 | * Strip leading and trailing spaces from the line as well as
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115 | * trailing comments.
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116 | */
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117 | char *psz = leftStrip(szLine);
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118 | if (*psz == ';')
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119 | continue; /* comment line. */
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120 |
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121 | char *pszComment = strchr(psz, ';');
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122 | if (pszComment)
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123 | *pszComment = '\0';
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124 |
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125 | unsigned cch = (unsigned)strlen(psz);
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126 | while (cch > 0 && (isspace(psz[cch - 1]) || psz[cch - 1] == '\r' || psz[cch - 1] == '\n'))
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127 | psz[--cch] = '\0';
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128 |
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129 | if (!cch)
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130 | continue;
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131 |
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132 | /*
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133 | * Check for known directives.
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134 | */
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135 | size_t cchWord0 = wordLength(psz);
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136 | #define WORD_CMP(pszWord1, cchWord1, szWord2) \
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137 | ( (cchWord1) == sizeof(szWord2) - 1 && memcmp(pszWord1, szWord2, sizeof(szWord2) - 1) == 0 )
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138 | if (WORD_CMP(psz, cchWord0, "EXPORTS"))
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139 | {
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140 | fInExports = true;
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141 |
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142 | /* In case there is an export on the same line. (Really allowed?) */
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143 | psz = leftStrip(psz + sizeof("EXPORTS") - 1);
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144 | if (!*psz)
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145 | continue;
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146 | }
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147 | /* Directives that we don't care about, but need to catch in order to
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148 | terminate the EXPORTS section in a timely manner. */
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149 | else if ( WORD_CMP(psz, cchWord0, "NAME")
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150 | || WORD_CMP(psz, cchWord0, "LIBRARY")
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151 | || WORD_CMP(psz, cchWord0, "DESCRIPTION")
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152 | || WORD_CMP(psz, cchWord0, "STACKSIZE")
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153 | || WORD_CMP(psz, cchWord0, "SECTIONS")
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154 | || WORD_CMP(psz, cchWord0, "SEGMENTS")
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155 | || WORD_CMP(psz, cchWord0, "VERSION")
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156 | )
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157 | {
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158 | fInExports = false;
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159 | }
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160 |
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161 | /*
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162 | * Process exports:
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163 | * entryname[=internalname] [@ordinal[ ][NONAME]] [DATA] [PRIVATE]
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164 | */
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165 | if (fInExports)
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166 | {
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167 | const char *pchName = psz;
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168 | unsigned cchName = wordLength(psz);
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169 |
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170 | psz = leftStrip(psz + cchName);
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171 | if (*psz == '=')
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172 | {
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173 | psz = leftStrip(psz + 1);
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174 | psz = leftStrip(psz + wordLength(psz));
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175 | }
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176 |
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177 | bool fNoName = true;
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178 | unsigned uOrdinal = ~0U;
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179 | if (*psz == '@')
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180 | {
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181 | psz++;
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182 | if (!isdigit(*psz))
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183 | {
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184 | fprintf(stderr, "%s:%u: error: Invalid ordinal spec.\n", pszInput, iLine);
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185 | return RTEXITCODE_FAILURE;
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186 | }
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187 | uOrdinal = *psz++ - '0';
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188 | while (isdigit(*psz))
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189 | {
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190 | uOrdinal *= 10;
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191 | uOrdinal += *psz++ - '0';
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192 | }
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193 | psz = leftStrip(psz);
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194 | cch = wordLength(psz);
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195 | if (WORD_CMP(psz, cch, "NONAME"))
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196 | {
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197 | #if 0
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198 | fNoName = true;
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199 | psz = leftStrip(psz + cch);
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200 | #else
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201 | fprintf(stderr, "%s:%u: error: NONAME export not implemented.\n", pszInput, iLine);
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202 | return RTEXITCODE_FAILURE;
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203 | #endif
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204 | }
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205 | }
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206 |
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207 | while (*psz)
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208 | {
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209 | cch = wordLength(psz);
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210 | if (WORD_CMP(psz, cch, "DATA"))
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211 | {
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212 | if (!g_fIgnoreData)
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213 | {
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214 | fprintf(stderr, "%s:%u: error: Cannot wrap up DATA export '%.*s'.\n",
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215 | pszInput, iLine, cchName, pchName);
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216 | return RTEXITCODE_SUCCESS;
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217 | }
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218 | }
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219 | else if (!WORD_CMP(psz, cch, "PRIVATE"))
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220 | {
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221 | fprintf(stderr, "%s:%u: error: Cannot wrap up DATA export '%.*s'.\n",
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222 | pszInput, iLine, cchName, pchName);
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223 | return RTEXITCODE_SUCCESS;
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224 | }
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225 | psz = leftStrip(psz + cch);
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226 | }
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227 |
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228 | /*
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229 | * Add the export.
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230 | */
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231 | PMYEXPORT pExp = (PMYEXPORT)malloc(sizeof(*pExp) + cchName);
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232 | if (!pExp)
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233 | {
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234 | fprintf(stderr, "%s:%u: error: Out of memory.\n", pszInput, iLine);
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235 | return RTEXITCODE_SUCCESS;
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236 | }
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237 | memcpy(pExp->szName, pchName, cchName);
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238 | pExp->szName[cchName] = '\0';
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239 | pExp->uOrdinal = uOrdinal;
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240 | pExp->fNoName = fNoName;
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241 | pExp->pNext = NULL;
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242 | *g_ppExpNext = pExp;
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243 | g_ppExpNext = &pExp->pNext;
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244 | }
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245 | }
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246 |
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247 | /*
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248 | * Why did we quit the loop, EOF or error?
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249 | */
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250 | if (feof(pInput))
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251 | return RTEXITCODE_SUCCESS;
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252 | fprintf(stderr, "error: Read while reading '%s' (iLine=%u).\n", pszInput, iLine);
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253 | return RTEXITCODE_FAILURE;
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254 | }
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255 |
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256 |
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257 | /**
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258 | * Parses a_apszInputs, populating the list pointed to by g_pExpHead.
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259 | *
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260 | * @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE, in the latter case full
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261 | * details has been displayed.
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262 | */
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263 | static RTEXITCODE parseInputs(void)
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264 | {
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265 | RTEXITCODE rcExit = RTEXITCODE_SUCCESS;
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266 | for (unsigned i = 0; i < g_cInputs; i++)
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267 | {
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268 | FILE *pInput = fopen(g_apszInputs[i], "r");
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269 | if (pInput)
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270 | {
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271 | RTEXITCODE rcExit2 = parseInputInner(pInput, g_apszInputs[i]);
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272 | fclose(pInput);
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273 | if (rcExit2 == RTEXITCODE_SUCCESS && !g_pExpHead)
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274 | {
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275 | fprintf(stderr, "error: Found no exports in '%s'.\n", g_apszInputs[i]);
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276 | rcExit2 = RTEXITCODE_FAILURE;
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277 | }
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278 | if (rcExit2 != RTEXITCODE_SUCCESS)
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279 | rcExit = rcExit2;
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280 | }
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281 | else
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282 | {
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283 | fprintf(stderr, "error: Failed to open '%s' for reading.\n", g_apszInputs[i]);
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284 | rcExit = RTEXITCODE_FAILURE;
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285 | }
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286 | }
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287 | return rcExit;
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288 | }
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289 |
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290 |
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291 | /**
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292 | * Generates the assembly source code, writing it to @a pOutput.
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293 | *
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294 | * @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE, in the latter case full
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295 | * details has been displayed.
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296 | * @param pOutput The output stream (caller checks it for errors
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297 | * when closing).
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298 | */
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299 | static RTEXITCODE generateOutputInner(FILE *pOutput)
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300 | {
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301 | fprintf(pOutput, ";;\n");
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302 | for (unsigned i = 0; i < g_cInputs; i++)
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303 | fprintf(pOutput, ";; Autogenerated from '%s'.\n", g_apszInputs[i]);
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304 |
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305 | fprintf(pOutput,
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306 | ";; DO NOT EDIT!\n"
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307 | ";;\n"
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308 | "\n"
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309 | "\n"
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310 | "%%include \"iprt/asmdefs.mac\"\n"
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311 | "\n"
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312 | "\n");
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313 |
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314 | /*
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315 | * Put the thunks first for alignment and other reasons. It's the hot part of the code.
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316 | */
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317 | fprintf(pOutput,
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318 | ";\n"
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319 | "; Thunks.\n"
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320 | ";\n"
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321 | "BEGINCODE\n");
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322 | for (PMYEXPORT pExp = g_pExpHead; pExp; pExp = pExp->pNext)
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323 | fprintf(pOutput,
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324 | "BEGINPROC %s\n"
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325 | " jmp RTCCPTR_PRE [g_pfn%s xWrtRIP]\n"
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326 | "ENDPROC %s\n",
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327 | pExp->szName,
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328 | pExp->szName,
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329 | pExp->szName);
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330 | fprintf(pOutput,
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331 | "\n"
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332 | "\n");
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333 |
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334 | /*
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335 | * Import pointers
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336 | */
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337 | fprintf(pOutput,
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338 | ";\n"
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339 | "; Import pointers. Initialized to point a lazy loading stubs.\n"
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340 | ";\n"
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341 | "BEGINDATA\n"
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342 | "g_apfnImports:\n");
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343 | for (PMYEXPORT pExp = g_pExpHead; pExp; pExp = pExp->pNext)
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344 | fprintf(pOutput,
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345 | "%%ifdef ASM_FORMAT_PE\n"
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346 | "global __imp_%s\n"
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347 | "__imp_%s:\n"
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348 | "%%endif\n"
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349 | "g_pfn%s RTCCPTR_DEF ___LazyLoad___%s\n",
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350 | pExp->szName,
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351 | pExp->szName,
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352 | pExp->szName,
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353 | pExp->szName);
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354 | fprintf(pOutput,
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355 | "RTCCPTR_DEF 0 ; Terminator entry for traversal.\n"
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356 | "\n"
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357 | "\n");
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358 |
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359 | /*
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360 | * Now for the less important stuff, starting with the names.
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361 | *
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362 | * We keep the names separate so we can traverse them in parallel to
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363 | * g_apfnImports in the load-everything routine further down.
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364 | */
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365 | fprintf(pOutput,
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366 | ";\n"
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367 | "; Imported names.\n"
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368 | ";\n"
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369 | "BEGINCODE\n"
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370 | "g_szLibrary db '%s',0\n"
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371 | "g_szzNames:\n",
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372 | g_pszLibrary);
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373 | for (PMYEXPORT pExp = g_pExpHead; pExp; pExp = pExp->pNext)
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374 | fprintf(pOutput, "g_sz%s: db '%s',0\n", pExp->szName, pExp->szName);
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375 | fprintf(pOutput,
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376 | "g_EndOfNames: db 0\n"
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377 | "\n"
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378 | "\n");
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379 |
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380 | /*
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381 | * The per import lazy load code.
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382 | */
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383 | fprintf(pOutput,
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384 | ";\n"
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385 | "; Lazy load+resolve stubs.\n"
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386 | ";\n"
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387 | "BEGINCODE\n");
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388 | for (PMYEXPORT pExp = g_pExpHead; pExp; pExp = pExp->pNext)
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389 | fprintf(pOutput,
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390 | "___LazyLoad___%s:\n"
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391 | /* "int3\n" */
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392 | "%%ifdef RT_ARCH_AMD64\n"
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393 | " lea rax, [g_sz%s wrt rip]\n"
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394 | " lea r10, [g_pfn%s wrt rip]\n"
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395 | "%%elifdef RT_ARCH_X86\n"
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396 | " push g_sz%s\n"
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397 | " push g_pfn%s\n"
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398 | "%%else\n"
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399 | " %%error \"Unsupported architecture\"\n"
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400 | "%%endif\n"
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401 | " call LazyLoadResolver\n"
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402 | "%%ifdef RT_ARCH_X86\n"
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403 | " add esp, 8h\n"
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404 | "%%endif\n"
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405 | " jmp NAME(%s)\n"
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406 | "\n"
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407 | ,
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408 | pExp->szName,
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409 | pExp->szName,
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410 | pExp->szName,
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411 | pExp->szName,
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412 | pExp->szName,
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413 | pExp->szName);
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414 | fprintf(pOutput,
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415 | "\n"
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416 | "\n"
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417 | "\n");
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418 |
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419 | /*
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420 | * The code that does the loading and resolving.
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421 | */
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422 | fprintf(pOutput,
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423 | ";\n"
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424 | "; The module handle.\n"
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425 | ";\n"
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426 | "BEGINDATA\n"
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427 | "g_hMod RTCCPTR_DEF 0\n"
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428 | "\n"
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429 | "\n"
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430 | "\n");
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431 |
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432 | /*
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433 | * How we load the module needs to be selectable later on.
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434 | *
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435 | * The LazyLoading routine returns the module handle in RCX/ECX, caller
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436 | * saved all necessary registers.
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437 | */
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438 | fprintf(pOutput,
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439 | ";\n"
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440 | ";SUPR3DECL(int) SUPR3HardenedLdrLoadAppPriv(const char *pszFilename, PRTLDRMOD phLdrMod,\n"
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441 | "; uint32_t fFlags, PRTERRINFO pErrInfo);\n"
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442 | ";\n"
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443 | "EXTERN_IMP2 SUPR3HardenedLdrLoadAppPriv\n"
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444 | "BEGINCODE\n"
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445 | "\n"
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446 | "LazyLoading:\n"
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447 | " mov xCX, [g_hMod xWrtRIP]\n"
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448 | " or xCX, xCX\n"
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449 | " jnz .return\n"
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450 | "\n"
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451 | "%%ifdef ASM_CALL64_GCC\n"
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452 | " xor rcx, rcx ; pErrInfo\n"
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453 | " xor rdx, rdx ; fFlags (local load)\n"
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454 | " lea rsi, [g_hMod wrt rip] ; phLdrMod\n"
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455 | " lea rdi, [g_szLibrary wrt rip] ; pszFilename\n"
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456 | " sub rsp, 08h\n"
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457 | " call IMP2(SUPR3HardenedLdrLoadAppPriv)\n"
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458 | " add rsp, 08h\n"
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459 | "\n"
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460 | "%%elifdef ASM_CALL64_MSC\n"
|
---|
461 | " xor r9, r9 ; pErrInfo\n"
|
---|
462 | " xor r8, r8 ; fFlags (local load)\n"
|
---|
463 | " lea rdx, [g_hMod wrt rip] ; phLdrMod\n"
|
---|
464 | " lea rcx, [g_szLibrary wrt rip] ; pszFilename\n"
|
---|
465 | " sub rsp, 28h\n"
|
---|
466 | " call IMP2(SUPR3HardenedLdrLoadAppPriv)\n"
|
---|
467 | " add rsp, 28h\n"
|
---|
468 | "\n"
|
---|
469 | "%%elifdef RT_ARCH_X86\n"
|
---|
470 | " sub xSP, 0ch\n"
|
---|
471 | " push 0 ; pErrInfo\n"
|
---|
472 | " push 0 ; fFlags (local load)\n"
|
---|
473 | " push g_hMod ; phLdrMod\n"
|
---|
474 | " push g_szLibrary ; pszFilename\n"
|
---|
475 | " call IMP2(SUPR3HardenedLdrLoadAppPriv)\n"
|
---|
476 | " add esp, 1ch\n"
|
---|
477 | "%%else\n"
|
---|
478 | " %%error \"Unsupported architecture\"\n"
|
---|
479 | "%%endif\n"
|
---|
480 | " or eax, eax\n"
|
---|
481 | " jz .loadok\n"
|
---|
482 | ".badload:\n"
|
---|
483 | " int3\n"
|
---|
484 | " jmp .badload\n"
|
---|
485 | ".loadok:\n"
|
---|
486 | " mov xCX, [g_hMod xWrtRIP]\n"
|
---|
487 | ".return:\n"
|
---|
488 | " ret\n"
|
---|
489 | "LazyLoading_End:\n"
|
---|
490 | "\n"
|
---|
491 | "\n");
|
---|
492 |
|
---|
493 |
|
---|
494 | fprintf(pOutput,
|
---|
495 | ";\n"
|
---|
496 | ";RTDECL(int) RTLdrGetSymbol(RTLDRMOD hLdrMod, const char *pszSymbol, void **ppvValue);\n"
|
---|
497 | ";\n"
|
---|
498 | "EXTERN_IMP2 RTLdrGetSymbol\n"
|
---|
499 | "BEGINCODE\n"
|
---|
500 | "LazyLoadResolver:\n"
|
---|
501 | "%%ifdef RT_ARCH_AMD64\n"
|
---|
502 | " push rbp\n"
|
---|
503 | " mov rbp, rsp\n"
|
---|
504 | " push r15\n"
|
---|
505 | " push r14\n"
|
---|
506 | " mov r15, rax ; name\n"
|
---|
507 | " mov r14, r10 ; ppfn\n"
|
---|
508 | " push r9\n"
|
---|
509 | " push r8\n"
|
---|
510 | " push rcx\n"
|
---|
511 | " push rdx\n"
|
---|
512 | " push r12\n"
|
---|
513 | " %%ifdef ASM_CALL64_GCC\n"
|
---|
514 | " push rsi\n"
|
---|
515 | " push rdi\n"
|
---|
516 | " mov r12, rsp\n"
|
---|
517 | " %%else\n"
|
---|
518 | " mov r12, rsp\n"
|
---|
519 | " sub rsp, 20h\n"
|
---|
520 | " %%endif\n"
|
---|
521 | " and rsp, 0fffffff0h ; Try make sure the stack is aligned\n"
|
---|
522 | "\n"
|
---|
523 | " call LazyLoading ; returns handle in rcx\n"
|
---|
524 | " %%ifdef ASM_CALL64_GCC\n"
|
---|
525 | " mov rdi, rcx ; hLdrMod\n"
|
---|
526 | " mov rsi, r15 ; pszSymbol\n"
|
---|
527 | " mov rdx, r14 ; ppvValue\n"
|
---|
528 | " %%else\n"
|
---|
529 | " mov rdx, r15 ; pszSymbol\n"
|
---|
530 | " mov r8, r14 ; ppvValue\n"
|
---|
531 | " %%endif\n"
|
---|
532 | " call IMP2(RTLdrGetSymbol)\n"
|
---|
533 | " or eax, eax\n"
|
---|
534 | " jz .symok\n"
|
---|
535 | ".badsym:\n"
|
---|
536 | " int3\n"
|
---|
537 | " jmp .badsym\n"
|
---|
538 | ".symok:\n"
|
---|
539 | "\n"
|
---|
540 | " mov rsp, r12\n"
|
---|
541 | " %%ifdef ASM_CALL64_GCC\n"
|
---|
542 | " pop rdi\n"
|
---|
543 | " pop rsi\n"
|
---|
544 | " %%endif\n"
|
---|
545 | " pop r12\n"
|
---|
546 | " pop rdx\n"
|
---|
547 | " pop rcx\n"
|
---|
548 | " pop r8\n"
|
---|
549 | " pop r9\n"
|
---|
550 | " pop r14\n"
|
---|
551 | " pop r15\n"
|
---|
552 | " leave\n"
|
---|
553 | "\n"
|
---|
554 | "%%elifdef RT_ARCH_X86\n"
|
---|
555 | " push ebp\n"
|
---|
556 | " mov ebp, esp\n"
|
---|
557 | " push eax\n"
|
---|
558 | " push ecx\n"
|
---|
559 | " push edx\n"
|
---|
560 | " and esp, 0fffffff0h\n"
|
---|
561 | "\n"
|
---|
562 | ".loaded:\n"
|
---|
563 | " mov eax, [ebp + 4] ; value addr\n"
|
---|
564 | " push eax\n"
|
---|
565 | " mov edx, [ebp + 8] ; symbol name\n"
|
---|
566 | " push edx\n"
|
---|
567 | " call LazyLoading ; returns handle in ecx\n"
|
---|
568 | " mov ecx, [g_hMod]\n"
|
---|
569 | " call IMP2(RTLdrGetSymbol)\n"
|
---|
570 | " or eax, eax\n"
|
---|
571 | " jz .symok\n"
|
---|
572 | ".badsym:\n"
|
---|
573 | " int3\n"
|
---|
574 | " jmp .badsym\n"
|
---|
575 | ".symok:\n"
|
---|
576 | " lea esp, [ebp - 0ch]\n"
|
---|
577 | " pop edx\n"
|
---|
578 | " pop ecx\n"
|
---|
579 | " pop eax\n"
|
---|
580 | " leave\n"
|
---|
581 | "%%else\n"
|
---|
582 | " %%error \"Unsupported architecture\"\n"
|
---|
583 | "%%endif\n"
|
---|
584 | " ret\n"
|
---|
585 | "LazyLoadResolver_End:\n"
|
---|
586 | "\n"
|
---|
587 | "\n"
|
---|
588 | );
|
---|
589 |
|
---|
590 |
|
---|
591 |
|
---|
592 | /*
|
---|
593 | * C callable method for explicitly loading the library and optionally
|
---|
594 | * resolving all the imports.
|
---|
595 | */
|
---|
596 | if (g_fWithExplictLoadFunction)
|
---|
597 | {
|
---|
598 | int cchLibBaseName = (int)(strchr(g_pszLibrary, '.') ? strchr(g_pszLibrary, '.') - g_pszLibrary : strlen(g_pszLibrary));
|
---|
599 | fprintf(pOutput,
|
---|
600 | ";;\n"
|
---|
601 | "; ExplicitlyLoad%.*s(bool fResolveAllImports, pErrInfo);\n"
|
---|
602 | ";\n"
|
---|
603 | "EXTERN_IMP2 RTErrInfoSet\n"
|
---|
604 | "BEGINCODE\n"
|
---|
605 | "BEGINPROC ExplicitlyLoad%.*s\n"
|
---|
606 | " push xBP\n"
|
---|
607 | " mov xBP, xSP\n"
|
---|
608 | " push xBX\n"
|
---|
609 | "%%ifdef ASM_CALL64_GCC\n"
|
---|
610 | " %%define pszCurStr r14\n"
|
---|
611 | " push r14\n"
|
---|
612 | "%%else\n"
|
---|
613 | " %%define pszCurStr xDI\n"
|
---|
614 | " push xDI\n"
|
---|
615 | "%%endif\n"
|
---|
616 | " sub xSP, 40h\n"
|
---|
617 | "\n"
|
---|
618 | " ;\n"
|
---|
619 | " ; Save parameters on stack (64-bit only).\n"
|
---|
620 | " ;\n"
|
---|
621 | "%%ifdef ASM_CALL64_GCC\n"
|
---|
622 | " mov [xBP - xCB * 3], rdi ; fResolveAllImports\n"
|
---|
623 | " mov [xBP - xCB * 4], rsi ; pErrInfo\n"
|
---|
624 | "%%elifdef ASM_CALL64_MSC\n"
|
---|
625 | " mov [xBP - xCB * 3], rcx ; fResolveAllImports\n"
|
---|
626 | " mov [xBP - xCB * 4], rdx ; pErrInfo\n"
|
---|
627 | "%%endif\n"
|
---|
628 | "\n"
|
---|
629 | " ;\n"
|
---|
630 | " ; Is the module already loaded?\n"
|
---|
631 | " ;\n"
|
---|
632 | " cmp RTCCPTR_PRE [g_hMod xWrtRIP], 0\n"
|
---|
633 | " jnz .loaded\n"
|
---|
634 | "\n"
|
---|
635 | " ;\n"
|
---|
636 | " ; Load the module.\n"
|
---|
637 | " ;\n"
|
---|
638 | "%%ifdef ASM_CALL64_GCC\n"
|
---|
639 | " mov rcx, [xBP - xCB * 4] ; pErrInfo\n"
|
---|
640 | " xor rdx, rdx ; fFlags (local load)\n"
|
---|
641 | " lea rsi, [g_hMod wrt rip] ; phLdrMod\n"
|
---|
642 | " lea rdi, [g_szLibrary wrt rip] ; pszFilename\n"
|
---|
643 | " call IMP2(SUPR3HardenedLdrLoadAppPriv)\n"
|
---|
644 | "\n"
|
---|
645 | "%%elifdef ASM_CALL64_MSC\n"
|
---|
646 | " mov r9, [xBP - xCB * 4] ; pErrInfo\n"
|
---|
647 | " xor r8, r8 ; fFlags (local load)\n"
|
---|
648 | " lea rdx, [g_hMod wrt rip] ; phLdrMod\n"
|
---|
649 | " lea rcx, [g_szLibrary wrt rip] ; pszFilename\n"
|
---|
650 | " call IMP2(SUPR3HardenedLdrLoadAppPriv)\n"
|
---|
651 | "\n"
|
---|
652 | "%%elifdef RT_ARCH_X86\n"
|
---|
653 | " sub xSP, 0ch\n"
|
---|
654 | " push dword [xBP + 12] ; pErrInfo\n"
|
---|
655 | " push 0 ; fFlags (local load)\n"
|
---|
656 | " push g_hMod ; phLdrMod\n"
|
---|
657 | " push g_szLibrary ; pszFilename\n"
|
---|
658 | " call IMP2(SUPR3HardenedLdrLoadAppPriv)\n"
|
---|
659 | " add esp, 1ch\n"
|
---|
660 | "%%else\n"
|
---|
661 | " %%error \"Unsupported architecture\"\n"
|
---|
662 | "%%endif\n"
|
---|
663 | " or eax, eax\n"
|
---|
664 | " jnz .return\n"
|
---|
665 | "\n"
|
---|
666 | " ;\n"
|
---|
667 | " ; Resolve the imports too if requested to do so.\n"
|
---|
668 | " ;\n"
|
---|
669 | ".loaded:\n"
|
---|
670 | "%%ifdef ASM_ARCH_X86\n"
|
---|
671 | " cmp byte [xBP + 8], 0\n"
|
---|
672 | "%%else\n"
|
---|
673 | " cmp byte [xBP - xCB * 3], 0\n"
|
---|
674 | "%%endif\n"
|
---|
675 | " je .return\n"
|
---|
676 | "\n"
|
---|
677 | " lea pszCurStr, [g_szzNames xWrtRIP]\n"
|
---|
678 | " lea xBX, [g_apfnImports xWrtRIP]\n"
|
---|
679 | ".next_import:\n"
|
---|
680 | " cmp RTCCPTR_PRE [xBX], 0\n"
|
---|
681 | " je .return\n"
|
---|
682 | "%%ifdef ASM_CALL64_GCC\n"
|
---|
683 | " mov rdx, xBX ; ppvValue\n"
|
---|
684 | " mov rsi, pszCurStr ; pszSymbol\n"
|
---|
685 | " mov rdi, [g_hMod wrt rip] ; hLdrMod\n"
|
---|
686 | " call IMP2(RTLdrGetSymbol)\n"
|
---|
687 | "%%elifdef ASM_CALL64_MSC\n"
|
---|
688 | " mov r8, xBX ; ppvValue\n"
|
---|
689 | " mov rdx, pszCurStr ; pszSymbol\n"
|
---|
690 | " mov rcx, [g_hMod wrt rip] ; pszSymbol\n"
|
---|
691 | " call IMP2(RTLdrGetSymbol)\n"
|
---|
692 | "%%else\n"
|
---|
693 | " push xBX ; ppvValue\n"
|
---|
694 | " push pszCurStr ; pszSymbol\n"
|
---|
695 | " push RTCCPTR_PRE [g_hMod] ; hLdrMod\n"
|
---|
696 | " call IMP2(RTLdrGetSymbol)\n"
|
---|
697 | " add xSP, 0ch\n"
|
---|
698 | "%%endif\n"
|
---|
699 | " or eax, eax\n"
|
---|
700 | " jnz .symbol_error\n"
|
---|
701 | "\n"
|
---|
702 | " ; Advance.\n"
|
---|
703 | " add xBX, RTCCPTR_CB\n"
|
---|
704 | " xor eax, eax\n"
|
---|
705 | " mov xCX, 0ffffffffh\n"
|
---|
706 | "%%ifdef ASM_CALL64_GCC\n"
|
---|
707 | " mov xDI, pszCurStr\n"
|
---|
708 | " repne scasb\n"
|
---|
709 | " mov pszCurStr, xDI\n"
|
---|
710 | "%%else\n"
|
---|
711 | " repne scasb\n"
|
---|
712 | "%%endif\n"
|
---|
713 | " jmp .next_import\n"
|
---|
714 | "\n"
|
---|
715 | " ;\n"
|
---|
716 | " ; Error loading a symbol. Call RTErrInfoSet on pErrInfo (preserves eax).\n"
|
---|
717 | " ;\n"
|
---|
718 | ".symbol_error:\n"
|
---|
719 | "%%ifdef ASM_CALL64_GCC\n"
|
---|
720 | " mov rdx, pszCurStr ; pszMsg\n"
|
---|
721 | " mov esi, eax ; rc\n"
|
---|
722 | " mov rdi, [xBP - xCB * 4] ; pErrInfo\n"
|
---|
723 | " call IMP2(RTErrInfoSet)\n"
|
---|
724 | "%%elifdef ASM_CALL64_MSC\n"
|
---|
725 | " mov r8, pszCurStr ; pszMsg\n"
|
---|
726 | " mov edx, eax ; rc\n"
|
---|
727 | " mov rcx, [xBP - xCB * 4] ; pErrInfo\n"
|
---|
728 | " call IMP2(RTErrInfoSet)\n"
|
---|
729 | "%%else\n"
|
---|
730 | " push pszCurStr ; pszMsg\n"
|
---|
731 | " push eax ; pszSymbol\n"
|
---|
732 | " push dword [xBP + 0ch] ; pErrInfo\n"
|
---|
733 | " call IMP2(RTErrInfoSet)\n"
|
---|
734 | " add xSP, 0ch\n"
|
---|
735 | "%%endif\n"
|
---|
736 | " "
|
---|
737 | "\n"
|
---|
738 | ".return:\n"
|
---|
739 | " lea xSP, [xBP - xCB * 3]\n"
|
---|
740 | " pop pszCurStr\n"
|
---|
741 | " pop xBX\n"
|
---|
742 | " leave\n"
|
---|
743 | " ret\n"
|
---|
744 | "ENDPROC ExplicitlyLoad%.*s\n"
|
---|
745 | "\n"
|
---|
746 | "\n"
|
---|
747 | ,
|
---|
748 | cchLibBaseName, g_pszLibrary,
|
---|
749 | cchLibBaseName, g_pszLibrary,
|
---|
750 | cchLibBaseName, g_pszLibrary
|
---|
751 | );
|
---|
752 | }
|
---|
753 |
|
---|
754 |
|
---|
755 | return RTEXITCODE_SUCCESS;
|
---|
756 | }
|
---|
757 |
|
---|
758 |
|
---|
759 | /**
|
---|
760 | * Generates the assembly source code, writing it to g_pszOutput.
|
---|
761 | *
|
---|
762 | * @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE, in the latter case full
|
---|
763 | * details has been displayed.
|
---|
764 | */
|
---|
765 | static RTEXITCODE generateOutput(void)
|
---|
766 | {
|
---|
767 | RTEXITCODE rcExit = RTEXITCODE_FAILURE;
|
---|
768 | FILE *pOutput = fopen(g_pszOutput, "w");
|
---|
769 | if (pOutput)
|
---|
770 | {
|
---|
771 | rcExit = generateOutputInner(pOutput);
|
---|
772 | if (fclose(pOutput))
|
---|
773 | {
|
---|
774 | fprintf(stderr, "error: Error closing '%s'.\n", g_pszOutput);
|
---|
775 | rcExit = RTEXITCODE_FAILURE;
|
---|
776 | }
|
---|
777 | }
|
---|
778 | else
|
---|
779 | fprintf(stderr, "error: Failed to open '%s' for writing.\n", g_pszOutput);
|
---|
780 | return rcExit;
|
---|
781 | }
|
---|
782 |
|
---|
783 |
|
---|
784 | /**
|
---|
785 | * Displays usage information.
|
---|
786 | *
|
---|
787 | * @returns RTEXITCODE_SUCCESS.
|
---|
788 | * @param pszArgv0 The argv[0] string.
|
---|
789 | */
|
---|
790 | static int usage(const char *pszArgv0)
|
---|
791 | {
|
---|
792 | printf("usage: %s [options] --libary <loadname> --output <lazyload.asm> <input.def>\n"
|
---|
793 | "\n"
|
---|
794 | "Options:\n"
|
---|
795 | " --explicit-load-function, --no-explicit-load-function\n"
|
---|
796 | " Whether to include the explicit load function, default is not to.\n"
|
---|
797 | "\n"
|
---|
798 | "Copyright (C) 2013-2015 Oracle Corporation\n"
|
---|
799 | , pszArgv0);
|
---|
800 |
|
---|
801 | return RTEXITCODE_SUCCESS;
|
---|
802 | }
|
---|
803 |
|
---|
804 |
|
---|
805 | int main(int argc, char **argv)
|
---|
806 | {
|
---|
807 | /*
|
---|
808 | * Parse options.
|
---|
809 | */
|
---|
810 | for (int i = 1; i < argc; i++)
|
---|
811 | {
|
---|
812 | const char *psz = argv[i];
|
---|
813 | if (*psz == '-')
|
---|
814 | {
|
---|
815 | if (!strcmp(psz, "--output") || !strcmp(psz, "-o"))
|
---|
816 | {
|
---|
817 | if (++i >= argc)
|
---|
818 | {
|
---|
819 | fprintf(stderr, "syntax error: File name expected after '%s'.\n", psz);
|
---|
820 | return RTEXITCODE_SYNTAX;
|
---|
821 | }
|
---|
822 | g_pszOutput = argv[i];
|
---|
823 | }
|
---|
824 | else if (!strcmp(psz, "--library") || !strcmp(psz, "-l"))
|
---|
825 | {
|
---|
826 | if (++i >= argc)
|
---|
827 | {
|
---|
828 | fprintf(stderr, "syntax error: Library name expected after '%s'.\n", psz);
|
---|
829 | return RTEXITCODE_SYNTAX;
|
---|
830 | }
|
---|
831 | g_pszLibrary = argv[i];
|
---|
832 | }
|
---|
833 | else if (!strcmp(psz, "--explicit-load-function"))
|
---|
834 | g_fWithExplictLoadFunction = true;
|
---|
835 | else if (!strcmp(psz, "--no-explicit-load-function"))
|
---|
836 | g_fWithExplictLoadFunction = false;
|
---|
837 | /** @todo Support different load methods so this can be used on system libs and
|
---|
838 | * such if we like. */
|
---|
839 | else if ( !strcmp(psz, "--help")
|
---|
840 | || !strcmp(psz, "-help")
|
---|
841 | || !strcmp(psz, "-h")
|
---|
842 | || !strcmp(psz, "-?") )
|
---|
843 | return usage(argv[0]);
|
---|
844 | else if ( !strcmp(psz, "--version")
|
---|
845 | || !strcmp(psz, "-V"))
|
---|
846 | {
|
---|
847 | printf("$Revision: 54141 $\n");
|
---|
848 | return RTEXITCODE_SUCCESS;
|
---|
849 | }
|
---|
850 | else
|
---|
851 | {
|
---|
852 | fprintf(stderr, "syntax error: Unknown option '%s'.\n", psz);
|
---|
853 | return RTEXITCODE_SYNTAX;
|
---|
854 | }
|
---|
855 | }
|
---|
856 | else
|
---|
857 | {
|
---|
858 | if (g_cInputs >= RT_ELEMENTS(g_apszInputs))
|
---|
859 | {
|
---|
860 | fprintf(stderr, "syntax error: Too many input files, max is %d.\n", (int)RT_ELEMENTS(g_apszInputs));
|
---|
861 | return RTEXITCODE_SYNTAX;
|
---|
862 | }
|
---|
863 | g_apszInputs[g_cInputs++] = argv[i];
|
---|
864 | }
|
---|
865 | }
|
---|
866 | if (g_cInputs == 0)
|
---|
867 | {
|
---|
868 | fprintf(stderr, "syntax error: No input file specified.\n");
|
---|
869 | return RTEXITCODE_SYNTAX;
|
---|
870 | }
|
---|
871 | if (!g_pszOutput)
|
---|
872 | {
|
---|
873 | fprintf(stderr, "syntax error: No output file specified.\n");
|
---|
874 | return RTEXITCODE_SYNTAX;
|
---|
875 | }
|
---|
876 | if (!g_pszLibrary)
|
---|
877 | {
|
---|
878 | fprintf(stderr, "syntax error: No library name specified.\n");
|
---|
879 | return RTEXITCODE_SYNTAX;
|
---|
880 | }
|
---|
881 |
|
---|
882 | /*
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883 | * Do the job.
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884 | */
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885 | RTEXITCODE rcExit = parseInputs();
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886 | if (rcExit == RTEXITCODE_SUCCESS)
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887 | rcExit = generateOutput();
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888 | return rcExit;
|
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889 | }
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890 |
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