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1 // dynamic-ld.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1993, 1994 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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240
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24 #ifdef HAVE_CONFIG_H |
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25 #include "config.h" |
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26 #endif |
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27 |
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28 #include <strstream.h> |
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29 |
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30 extern "C" |
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31 { |
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32 #include <dld/dld.h> |
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33 |
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34 #define boolean kpathsea_boolean |
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35 #define false kpathsea_false |
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36 #define true kpathsea_true |
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37 #include <kpathsea/pathsearch.h> |
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38 } |
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39 |
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40 #include "dynamic-ld.h" |
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41 #include "tree-const.h" |
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42 #include "user-prefs.h" |
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43 #include "variables.h" |
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44 #include "defaults.h" |
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45 #include "dirfns.h" |
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46 #include "octave.h" |
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47 #include "utils.h" |
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48 #include "error.h" |
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49 |
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50 typedef builtin_function * (*Octave_builtin_fcn_struct_fcn)(void); |
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51 |
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52 // XXX FIXME XXX -- should this list be in a user-level variable, |
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53 // with default taken from the environment? |
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54 |
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55 #ifndef STD_LIB_PATH |
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56 #define STD_LIB_PATH "/lib:/usr/lib:/usr/local/lib" |
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57 #endif |
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58 |
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59 #ifndef OCTAVE_LIB_PATH |
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60 #define OCTAVE_LIB_PATH OCTAVE_LIBDIR ":" FLIB_PATH ":" CXXLIB_PATH |
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61 #endif |
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62 |
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63 static char *lib_dir_path = OCTAVE_LIB_PATH ":" STD_LIB_PATH; |
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64 |
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65 // This is the list of interesting libraries that Octave is linked |
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66 // with. Maybe it should include the readline, info, and kpathsea |
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67 // libraries. Would there ever be a time that they would really be |
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68 // needed? |
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69 |
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70 #ifndef SYSTEM_LIB_LIST |
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71 #define SYSTEM_LIB_LIST "libtermcap.a:libm.a" ":" CXXLIB_LIST |
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72 #endif |
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73 |
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74 #ifndef OCTAVE_LIB_LIST |
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75 #define OCTAVE_LIB_LIST "liboctdld.a:liboctave.a:libcruft.a:libdld.a" |
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76 #endif |
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77 |
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78 static char *lib_list = OCTAVE_LIB_LIST ":" FLIB_LIST ":" SYSTEM_LIB_LIST; |
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79 |
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80 static char * |
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81 mangle_octave_builtin_name (const char *name) |
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82 { |
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83 char *tmp = strconcat (name, "__FRC13Octave_objecti"); |
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84 char *retval = strconcat ("F", tmp); |
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85 delete [] tmp; |
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86 return retval; |
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87 } |
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88 |
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89 static char * |
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90 mangle_octave_oct_file_name (const char *name) |
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91 { |
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92 char *tmp = strconcat (name, "__Fv"); |
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93 char *retval = strconcat ("FS", tmp); |
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94 delete [] tmp; |
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95 return retval; |
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96 } |
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97 |
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98 #ifdef WITH_DLD |
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99 |
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100 static void |
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101 octave_dld_init (void) |
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102 { |
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103 static int initialized = 0; |
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104 |
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105 if (! initialized) |
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106 { |
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107 static char *prog = make_absolute (raw_prog_name, |
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108 the_current_working_directory); |
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109 |
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110 char *full_path = dld_find_executable (prog); |
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111 |
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112 if (full_path) |
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113 { |
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114 int status = dld_init (full_path); |
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115 |
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116 if (status != 0) |
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117 error ("failed to load symbols from `%s'", full_path); |
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118 else |
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119 initialized = 1; |
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120 } |
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121 else |
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122 { |
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123 error ("octave_dld_init: can't find full path to `%s'", |
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124 raw_prog_name); |
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125 } |
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126 } |
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127 } |
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128 |
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129 static void |
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130 octave_list_undefined_symbols (ostream& os) |
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131 { |
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132 char **list = dld_list_undefined_sym (); |
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133 |
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134 if (list) |
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135 { |
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136 os << "undefined symbols:\n\n"; |
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137 for (int i = 0; i < dld_undefined_sym_count; i++) |
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138 os << list[i] << "\n"; |
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139 os << "\n"; |
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140 } |
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141 } |
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142 |
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143 static void * |
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144 dld_octave_resolve_reference (const char *name, const char *file = 0) |
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145 { |
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146 dld_create_reference (name); |
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147 |
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148 if (file) |
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149 { |
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150 if (dld_link (file) != 0) |
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151 { |
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152 error ("failed to link file %s", file); |
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153 return 0; |
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154 } |
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155 |
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156 if (dld_function_executable_p (name)) |
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157 return (void *) dld_get_func (name); |
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158 } |
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159 |
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160 // For each library, try to find it in a list of directories, then |
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161 // link to it. It would have been nice to use the kpathsea functions |
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162 // here too, but calls to them can't be nested as they would need to |
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163 // be here... |
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164 |
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165 char **libs = pathstring_to_vector (lib_list); |
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166 char **ptr = libs; |
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167 char *lib_list_elt; |
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168 |
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169 while ((lib_list_elt = *ptr++)) |
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170 { |
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171 char *lib = kpse_path_search (lib_dir_path, lib_list_elt, |
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172 kpathsea_true); |
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173 |
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174 if (lib && dld_link (lib) != 0) |
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175 { |
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176 error ("failed to link library %s", lib); |
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177 return 0; |
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178 } |
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179 |
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180 if (dld_function_executable_p (name)) |
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181 return (void *) dld_get_func (name); |
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182 } |
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183 |
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184 // If we get here, there was a problem. |
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185 |
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186 ostrstream output_buf; |
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187 octave_list_undefined_symbols (output_buf); |
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188 char *msg = output_buf.str (); |
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189 error (msg); |
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190 delete [] msg; |
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191 |
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192 return 0; |
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193 } |
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194 |
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195 static Octave_builtin_fcn |
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196 dld_octave_builtin (const char *name) |
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197 { |
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198 Octave_builtin_fcn retval = 0; |
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199 |
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200 char *mangled_name = mangle_octave_builtin_name (name); |
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201 |
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202 retval = (Octave_builtin_fcn) dld_octave_resolve_reference (mangled_name); |
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203 |
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204 delete [] mangled_name; |
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205 |
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206 return retval; |
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207 } |
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208 |
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209 static int |
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210 dld_octave_oct_file (const char *name) |
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211 { |
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212 char *oct_file = oct_file_in_path (name); |
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213 |
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214 if (oct_file) |
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215 { |
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216 char *mangled_name = mangle_octave_oct_file_name (name); |
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217 |
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218 Octave_builtin_fcn_struct_fcn f = |
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219 (Octave_builtin_fcn_struct_fcn) dld_octave_resolve_reference |
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220 (mangled_name, oct_file); |
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221 |
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222 if (f) |
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223 { |
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224 builtin_function *s = f (); |
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225 |
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226 if (s) |
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227 { |
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228 install_builtin_function (s); |
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229 return 1; |
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230 } |
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231 } |
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232 |
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233 delete [] oct_file; |
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234 } |
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235 |
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236 return 0; |
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237 } |
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238 |
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239 #endif |
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240 |
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241 Octave_builtin_fcn |
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242 load_octave_builtin (const char *name) |
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243 { |
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244 #ifdef WITH_DLD |
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245 return dld_octave_builtin (name); |
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246 #else |
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247 return 0; |
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248 #endif |
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249 } |
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250 |
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251 int |
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252 load_octave_oct_file (const char *name) |
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253 { |
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254 #ifdef WITH_DLD |
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255 return dld_octave_oct_file (name); |
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256 #endif |
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257 return 0; |
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258 } |
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259 |
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260 void |
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261 init_dynamic_linker (void) |
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262 { |
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263 #ifdef WITH_DLD |
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264 octave_dld_init (); |
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265 #endif |
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266 } |
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267 |
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268 // OLD: |
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269 |
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270 #if 0 |
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271 |
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272 void |
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273 octave_dld_tc2_unlink_by_symbol (const char *name, int hard) |
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274 { |
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275 // XXX FIXME XXX -- need to determine the name mangling scheme |
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276 // automatically, in case it changes, or is different on different |
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277 // systems, even if they have g++. |
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278 |
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279 char *mangled_fcn_name = strconcat (name, "__FRC13Octave_objecti"); |
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280 |
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281 int status = dld_unlink_by_symbol (mangled_fcn_name, hard); |
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282 |
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283 if (status != 0) |
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284 dld_perror ("octave_dld_tc2_unlink_by_symbol"); |
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285 |
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286 delete [] mangled_fcn_name; |
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287 } |
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288 |
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289 void |
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290 octave_dld_tc2_unlink_by_file (const char *name, int hard) |
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291 { |
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292 int status = dld_unlink_by_file (name, hard); |
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293 |
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294 if (status != 0) |
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295 dld_perror ("octave_dld_tc2_unlink_by_file"); |
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296 } |
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297 |
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298 #endif |
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299 |
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300 /* |
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301 ;;; Local Variables: *** |
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302 ;;; mode: C++ *** |
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303 ;;; page-delimiter: "^/\\*" *** |
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304 ;;; End: *** |
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305 */ |
