1 | /* |
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2 | * Copyright (c) 2011-2012, Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * Permission to use, copy, modify, and/or distribute this software for any |
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5 | * purpose with or without fee is hereby granted, provided that the above |
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6 | * copyright notice and this permission notice appear in all copies. |
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7 | * |
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8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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15 | */ |
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16 | /** |
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17 | * @file |
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18 | * |
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19 | * @ingroup rtems_rld |
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20 | * |
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21 | * @brief RTEMS Symbols Main manages opions, sequence of operations and exceptions. |
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22 | * |
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23 | */ |
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24 | |
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25 | #if HAVE_CONFIG_H |
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26 | #include "config.h" |
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27 | #endif |
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28 | |
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29 | #include <iostream> |
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30 | |
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31 | #include <cxxabi.h> |
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32 | #include <signal.h> |
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33 | #include <stdlib.h> |
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34 | #include <string.h> |
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35 | #include <unistd.h> |
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36 | |
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37 | #include <getopt.h> |
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38 | |
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39 | #include <rld.h> |
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40 | #include <rld-cc.h> |
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41 | #include <rld-outputter.h> |
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42 | #include <rld-process.h> |
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43 | #include <rld-resolver.h> |
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44 | |
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45 | #ifndef HAVE_KILL |
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46 | #define kill(p,s) raise(s) |
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47 | #endif |
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48 | |
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49 | /** |
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50 | * RTEMS Linker options. This needs to be rewritten to be like cc where only a |
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51 | * single '-' and long options is present. |
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52 | */ |
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53 | static struct option rld_opts[] = { |
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54 | { "help", no_argument, NULL, 'h' }, |
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55 | { "version", no_argument, NULL, 'V' }, |
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56 | { "verbose", no_argument, NULL, 'v' }, |
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57 | { "warn", no_argument, NULL, 'w' }, |
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58 | { "lib-path", required_argument, NULL, 'L' }, |
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59 | { "lib", required_argument, NULL, 'l' }, |
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60 | { "no-stdlibs", no_argument, NULL, 'n' }, |
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61 | { "cc", required_argument, NULL, 'C' }, |
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62 | { "exec-prefix", required_argument, NULL, 'E' }, |
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63 | { "march", required_argument, NULL, 'a' }, |
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64 | { "mcpu", required_argument, NULL, 'c' }, |
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65 | { NULL, 0, NULL, 0 } |
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66 | }; |
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67 | |
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68 | void |
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69 | usage (int exit_code) |
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70 | { |
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71 | std::cout << "rtems-syms [options] objects" << std::endl |
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72 | << "Options and arguments:" << std::endl |
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73 | << " -h : help (also --help)" << std::endl |
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74 | << " -V : print linker version number and exit (also --version)" << std::endl |
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75 | << " -v : verbose (trace import parts), can be supply multiple times" << std::endl |
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76 | << " to increase verbosity (also --verbose)" << std::endl |
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77 | << " -w : generate warnings (also --warn)" << std::endl |
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78 | << " -L path : path to a library, add multiple for more than" << std::endl |
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79 | << " one path (also --lib-path)" << std::endl |
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80 | << " -l lib : add lib to the libraries searched, add multiple" << std::endl |
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81 | << " for more than one library (also --lib)" << std::endl |
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82 | << " -S : search standard libraries (also --stdlibs)" << std::endl |
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83 | << " -C file : execute file as the target C compiler (also --cc)" << std::endl |
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84 | << " -E prefix : the RTEMS tool prefix (also --exec-prefix)" << std::endl |
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85 | << " -a march : machine architecture (also --march)" << std::endl |
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86 | << " -c cpu : machine architecture's CPU (also --mcpu)" << std::endl; |
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87 | ::exit (exit_code); |
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88 | } |
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89 | |
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90 | static void |
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91 | fatal_signal (int signum) |
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92 | { |
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93 | signal (signum, SIG_DFL); |
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94 | |
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95 | rld::process::temporaries.clean_up (); |
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96 | |
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97 | /* |
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98 | * Get the same signal again, this time not handled, so its normal effect |
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99 | * occurs. |
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100 | */ |
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101 | kill (getpid (), signum); |
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102 | } |
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103 | |
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104 | static void |
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105 | setup_signals (void) |
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106 | { |
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107 | if (signal (SIGINT, SIG_IGN) != SIG_IGN) |
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108 | signal (SIGINT, fatal_signal); |
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109 | #ifdef SIGHUP |
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110 | if (signal (SIGHUP, SIG_IGN) != SIG_IGN) |
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111 | signal (SIGHUP, fatal_signal); |
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112 | #endif |
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113 | if (signal (SIGTERM, SIG_IGN) != SIG_IGN) |
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114 | signal (SIGTERM, fatal_signal); |
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115 | #ifdef SIGPIPE |
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116 | if (signal (SIGPIPE, SIG_IGN) != SIG_IGN) |
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117 | signal (SIGPIPE, fatal_signal); |
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118 | #endif |
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119 | #ifdef SIGCHLD |
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120 | signal (SIGCHLD, SIG_DFL); |
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121 | #endif |
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122 | } |
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123 | |
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124 | int |
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125 | main (int argc, char* argv[]) |
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126 | { |
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127 | int ec = 0; |
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128 | |
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129 | setup_signals (); |
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130 | |
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131 | try |
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132 | { |
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133 | rld::files::cache cache; |
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134 | rld::files::paths libpaths; |
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135 | rld::files::paths libs; |
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136 | rld::files::paths objects; |
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137 | rld::files::paths libraries; |
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138 | rld::symbols::table symbols; |
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139 | std::string base_name; |
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140 | std::string cc_name; |
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141 | bool standard_libs = false; |
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142 | bool exec_prefix_set = false; |
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143 | #if HAVE_WARNINGS |
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144 | bool warnings = false; |
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145 | #endif |
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146 | |
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147 | libpaths.push_back ("."); |
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148 | |
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149 | while (true) |
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150 | { |
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151 | int opt = ::getopt_long (argc, argv, "hvwVSE:L:l:a:c:C:", rld_opts, NULL); |
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152 | if (opt < 0) |
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153 | break; |
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154 | |
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155 | switch (opt) |
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156 | { |
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157 | case 'V': |
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158 | std::cout << "rtems-syms (RTEMS Symbols) " << rld::version () |
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159 | << std::endl; |
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160 | ::exit (0); |
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161 | break; |
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162 | |
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163 | case 'v': |
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164 | rld::verbose_inc (); |
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165 | break; |
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166 | |
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167 | case 'w': |
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168 | #if HAVE_WARNINGS |
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169 | warnings = true; |
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170 | #endif |
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171 | break; |
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172 | |
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173 | case 'l': |
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174 | /* |
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175 | * The order is important. It is the search order. |
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176 | */ |
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177 | libs.push_back (optarg); |
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178 | break; |
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179 | |
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180 | case 'L': |
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181 | if ((optarg[::strlen (optarg) - 1] == '/') || |
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182 | (optarg[::strlen (optarg) - 1] == '\\')) |
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183 | optarg[::strlen (optarg) - 1] = '\0'; |
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184 | libpaths.push_back (optarg); |
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185 | break; |
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186 | |
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187 | case 'S': |
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188 | standard_libs = true; |
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189 | break; |
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190 | |
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191 | case 'C': |
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192 | if (exec_prefix_set == true) |
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193 | std::cerr << "warning: exec-prefix ignored when CC provided" << std::endl; |
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194 | rld::cc::cc = optarg; |
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195 | break; |
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196 | |
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197 | case 'E': |
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198 | exec_prefix_set = true; |
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199 | rld::cc::exec_prefix = optarg; |
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200 | break; |
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201 | |
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202 | case 'a': |
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203 | rld::cc::march = optarg; |
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204 | break; |
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205 | |
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206 | case 'c': |
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207 | rld::cc::mcpu = optarg; |
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208 | break; |
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209 | |
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210 | case '?': |
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211 | usage (3); |
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212 | break; |
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213 | |
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214 | case 'h': |
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215 | usage (0); |
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216 | break; |
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217 | } |
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218 | } |
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219 | |
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220 | argc -= optind; |
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221 | argv += optind; |
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222 | |
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223 | std::cout << "RTEMS Symbols " << rld::version () << std::endl; |
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224 | |
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225 | /* |
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226 | * If there are no object files there is nothing to link. |
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227 | */ |
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228 | if (argc == 0) |
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229 | throw rld::error ("no object files", "options"); |
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230 | |
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231 | /* |
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232 | * Load the remaining command line arguments into the cache as object |
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233 | * files. |
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234 | */ |
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235 | while (argc--) |
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236 | objects.push_back (*argv++); |
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237 | |
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238 | /* |
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239 | * Add the object files to the cache. |
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240 | */ |
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241 | cache.add (objects); |
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242 | |
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243 | /* |
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244 | * Open the cache. |
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245 | */ |
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246 | cache.open (); |
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247 | |
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248 | /* |
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249 | * If the full path to CC is not provided and the exec-prefix is not set by |
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250 | * the command line see if it can be detected from the object file |
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251 | * types. This must be after we have added the object files because they |
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252 | * are used when detecting. |
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253 | */ |
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254 | if (rld::cc::cc.empty () && !exec_prefix_set) |
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255 | rld::cc::exec_prefix = rld::elf::machine_type (); |
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256 | |
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257 | /* |
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258 | * Get the standard library paths |
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259 | */ |
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260 | if (standard_libs) |
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261 | rld::cc::get_standard_libpaths (libpaths); |
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262 | |
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263 | /* |
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264 | * Get the command line libraries. |
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265 | */ |
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266 | rld::files::find_libraries (libraries, libpaths, libs); |
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267 | |
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268 | /* |
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269 | * Are we to load standard libraries ? |
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270 | */ |
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271 | if (standard_libs) |
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272 | rld::cc::get_standard_libs (libraries, libpaths); |
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273 | |
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274 | /* |
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275 | * Load the library to the cache. |
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276 | */ |
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277 | cache.add_libraries (libraries); |
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278 | |
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279 | /* |
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280 | * Begin the archive session. This opens the archives and leaves them open |
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281 | * while we the symbol table is being used. The symbols reference object |
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282 | * files and the object files may reference archives and it is assumed they |
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283 | * are open and available. It is also assumed the number of library |
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284 | * archives being managed is less than the maximum file handles this |
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285 | * process can have open at any one time. If this is not the case this |
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286 | * approach would need to be reconsidered and the overhead of opening and |
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287 | * closing archives added. |
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288 | */ |
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289 | try |
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290 | { |
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291 | /* |
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292 | * Load the symbol table. |
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293 | */ |
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294 | cache.load_symbols (symbols); |
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295 | |
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296 | rld::map (cache, symbols); |
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297 | } |
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298 | catch (...) |
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299 | { |
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300 | cache.archives_end (); |
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301 | throw; |
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302 | } |
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303 | |
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304 | cache.archives_end (); |
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305 | } |
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306 | catch (rld::error re) |
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307 | { |
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308 | std::cerr << "error: " |
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309 | << re.where << ": " << re.what |
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310 | << std::endl; |
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311 | ec = 10; |
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312 | } |
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313 | catch (std::exception e) |
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314 | { |
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315 | int status; |
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316 | char* realname; |
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317 | realname = abi::__cxa_demangle (e.what(), 0, 0, &status); |
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318 | std::cerr << "error: exception: " << realname << " ["; |
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319 | ::free (realname); |
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320 | const std::type_info &ti = typeid (e); |
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321 | realname = abi::__cxa_demangle (ti.name(), 0, 0, &status); |
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322 | std::cerr << realname << "] " << e.what () << std::endl; |
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323 | ::free (realname); |
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324 | ec = 11; |
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325 | } |
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326 | catch (...) |
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327 | { |
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328 | /* |
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329 | * Helps to know if this happens. |
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330 | */ |
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331 | std::cout << "error: unhandled exception" << std::endl; |
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332 | ec = 12; |
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333 | } |
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334 | |
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335 | return ec; |
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336 | } |
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