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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, 1995 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 #ifdef WITH_DLD |
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33 #include <dld/dld.h> |
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34 #endif |
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35 } |
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36 |
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37 #include "defaults.h" |
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38 #include "dirfns.h" |
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39 #include "dynamic-ld.h" |
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40 #include "error.h" |
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41 #include "octave.h" |
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42 #include "pathsearch.h" |
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43 #include "tree-const.h" |
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44 #include "user-prefs.h" |
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45 #include "utils.h" |
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46 #include "variables.h" |
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47 |
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48 typedef builtin_function * (*Octave_builtin_fcn_struct_fcn)(void); |
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49 |
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50 // XXX FIXME XXX -- should this list be in a user-level variable, |
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51 // with default taken from the environment? |
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52 |
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53 #ifdef WITH_DLD |
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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 static void |
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99 octave_dld_init (void) |
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100 { |
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101 static int initialized = 0; |
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102 |
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103 if (! initialized) |
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104 { |
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105 char *full_path = 0; |
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106 |
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107 char *tmp = dld_find_executable (raw_prog_name); |
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108 if (tmp) |
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109 { |
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110 full_path = make_absolute (tmp, the_current_working_directory); |
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111 free (tmp); |
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112 } |
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113 |
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114 if (full_path) |
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115 { |
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116 int status = dld_init (full_path); |
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117 |
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118 if (status != 0) |
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119 error ("failed to load symbols from `%s'", full_path); |
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120 else |
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121 initialized = 1; |
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122 } |
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123 else |
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124 { |
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125 error ("octave_dld_init: can't find full path to `%s'", |
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126 raw_prog_name); |
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127 } |
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128 } |
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129 } |
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130 |
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131 static void |
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132 octave_list_undefined_symbols (ostream& os) |
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133 { |
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134 char **list = dld_list_undefined_sym (); |
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135 |
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136 if (list) |
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137 { |
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138 os << "undefined symbols:\n\n"; |
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139 for (int i = 0; i < dld_undefined_sym_count; i++) |
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140 os << list[i] << "\n"; |
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141 os << "\n"; |
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142 } |
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143 } |
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144 |
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145 static void * |
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146 dld_octave_resolve_reference (const char *name, const char *file = 0) |
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147 { |
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148 dld_create_reference (name); |
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149 |
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150 if (file) |
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151 { |
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152 if (dld_link (file) != 0) |
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153 { |
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154 error ("failed to link file %s", file); |
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155 return 0; |
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156 } |
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157 |
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158 if (dld_function_executable_p (name)) |
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159 return (void *) dld_get_func (name); |
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160 } |
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161 |
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162 // For each library, try to find it in a list of directories, then |
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163 // link to it. It would have been nice to use the kpathsea |
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164 // functions here too, but calls to them can't be nested as they |
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165 // would need to be here... |
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166 |
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167 char **libs = pathstring_to_vector (lib_list); |
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168 char **ptr = libs; |
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169 char *lib_list_elt; |
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170 |
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171 while ((lib_list_elt = *ptr++)) |
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172 { |
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173 char *lib = kpse_path_search (lib_dir_path, lib_list_elt, |
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174 kpathsea_true); |
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175 |
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176 if (lib && dld_link (lib) != 0) |
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177 { |
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178 error ("failed to link library %s", lib); |
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179 return 0; |
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180 } |
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181 |
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182 if (dld_function_executable_p (name)) |
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183 return (void *) dld_get_func (name); |
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184 } |
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185 |
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186 // If we get here, there was a problem. |
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187 |
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188 ostrstream output_buf; |
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189 octave_list_undefined_symbols (output_buf); |
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190 char *msg = output_buf.str (); |
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191 error (msg); |
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192 delete [] msg; |
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193 |
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194 return 0; |
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195 } |
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196 |
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197 static Octave_builtin_fcn |
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198 dld_octave_builtin (const char *name) |
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199 { |
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200 Octave_builtin_fcn retval = 0; |
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201 |
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202 char *mangled_name = mangle_octave_builtin_name (name); |
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203 |
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204 retval = (Octave_builtin_fcn) dld_octave_resolve_reference (mangled_name); |
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205 |
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206 delete [] mangled_name; |
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207 |
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208 return retval; |
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209 } |
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210 |
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211 static int |
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212 dld_octave_oct_file (const char *name) |
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213 { |
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214 char *oct_file = oct_file_in_path (name); |
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215 |
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216 if (oct_file) |
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217 { |
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218 char *mangled_name = mangle_octave_oct_file_name (name); |
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219 |
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220 Octave_builtin_fcn_struct_fcn f = |
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221 (Octave_builtin_fcn_struct_fcn) dld_octave_resolve_reference |
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222 (mangled_name, oct_file); |
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223 |
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224 if (f) |
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225 { |
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226 builtin_function *s = f (); |
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227 |
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228 if (s) |
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229 { |
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230 install_builtin_function (s); |
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231 return 1; |
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232 } |
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233 } |
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234 |
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235 delete [] oct_file; |
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236 } |
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237 |
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238 return 0; |
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239 } |
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240 |
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241 #endif |
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242 |
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243 Octave_builtin_fcn |
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244 load_octave_builtin (const char *name) |
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245 { |
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246 #ifdef WITH_DLD |
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247 return dld_octave_builtin (name); |
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248 #else |
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249 (void) name; |
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250 return 0; |
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251 #endif |
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252 } |
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253 |
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254 int |
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255 load_octave_oct_file (const char *name) |
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256 { |
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257 #ifdef WITH_DLD |
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258 return dld_octave_oct_file (name); |
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259 #endif |
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260 (void) name; |
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261 return 0; |
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262 } |
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263 |
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264 void |
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265 init_dynamic_linker (void) |
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266 { |
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267 #ifdef WITH_DLD |
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268 octave_dld_init (); |
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269 #endif |
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270 } |
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271 |
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272 // OLD: |
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273 |
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274 #if 0 |
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275 |
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276 void |
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277 octave_dld_tc2_unlink_by_symbol (const char *name, int hard) |
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278 { |
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279 // XXX FIXME XXX -- need to determine the name mangling scheme |
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280 // automatically, in case it changes, or is different on different |
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281 // systems, even if they have g++. |
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282 |
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283 char *mangled_fcn_name = strconcat (name, "__FRC13Octave_objecti"); |
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284 |
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285 int status = dld_unlink_by_symbol (mangled_fcn_name, hard); |
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286 |
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287 if (status != 0) |
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288 error ("octave_dld_tc2_unlink_by_symbol: %s", dld_strerror (0)); |
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289 |
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290 delete [] mangled_fcn_name; |
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291 } |
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292 |
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293 void |
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294 octave_dld_tc2_unlink_by_file (const char *name, int hard) |
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295 { |
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296 int status = dld_unlink_by_file (name, hard); |
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297 |
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298 if (status != 0) |
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299 error ("octave_dld_tc2_unlink_by_file: %s", dld_strerror (0)); |
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300 } |
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301 |
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302 #endif |
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303 |
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304 /* |
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305 ;;; Local Variables: *** |
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306 ;;; mode: C++ *** |
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307 ;;; page-delimiter: "^/\\*" *** |
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308 ;;; End: *** |
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309 */ |
