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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, 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 #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 #define boolean kpathsea_boolean |
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37 #define false kpathsea_false |
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38 #define true kpathsea_true |
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39 #include <kpathsea/pathsearch.h> |
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40 #undef true |
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41 #undef false |
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42 #undef boolean |
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43 } |
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44 |
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45 #include "dynamic-ld.h" |
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46 #include "tree-const.h" |
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47 #include "user-prefs.h" |
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48 #include "variables.h" |
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49 #include "defaults.h" |
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50 #include "dirfns.h" |
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51 #include "octave.h" |
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52 #include "utils.h" |
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53 #include "error.h" |
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54 |
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55 typedef builtin_function * (*Octave_builtin_fcn_struct_fcn)(void); |
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56 |
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57 // XXX FIXME XXX -- should this list be in a user-level variable, |
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58 // with default taken from the environment? |
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59 |
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733
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60 #ifdef WITH_DLD |
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61 |
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62 #ifndef STD_LIB_PATH |
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63 #define STD_LIB_PATH "/lib:/usr/lib:/usr/local/lib" |
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64 #endif |
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65 |
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66 #ifndef OCTAVE_LIB_PATH |
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67 #define OCTAVE_LIB_PATH OCTAVE_LIBDIR ":" FLIB_PATH ":" CXXLIB_PATH |
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68 #endif |
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69 |
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70 static char *lib_dir_path = OCTAVE_LIB_PATH ":" STD_LIB_PATH; |
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71 |
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72 // This is the list of interesting libraries that Octave is linked |
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73 // with. Maybe it should include the readline, info, and kpathsea |
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74 // libraries. Would there ever be a time that they would really be |
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75 // needed? |
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76 |
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77 #ifndef SYSTEM_LIB_LIST |
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78 #define SYSTEM_LIB_LIST "libtermcap.a:libm.a" ":" CXXLIB_LIST |
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79 #endif |
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80 |
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81 #ifndef OCTAVE_LIB_LIST |
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82 #define OCTAVE_LIB_LIST "liboctdld.a:liboctave.a:libcruft.a:libdld.a" |
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83 #endif |
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84 |
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85 static char *lib_list = OCTAVE_LIB_LIST ":" FLIB_LIST ":" SYSTEM_LIB_LIST; |
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86 |
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87 static char * |
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88 mangle_octave_builtin_name (const char *name) |
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89 { |
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90 char *tmp = strconcat (name, "__FRC13Octave_objecti"); |
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91 char *retval = strconcat ("F", tmp); |
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92 delete [] tmp; |
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93 return retval; |
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94 } |
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95 |
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96 static char * |
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97 mangle_octave_oct_file_name (const char *name) |
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98 { |
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99 char *tmp = strconcat (name, "__Fv"); |
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100 char *retval = strconcat ("FS", tmp); |
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101 delete [] tmp; |
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102 return retval; |
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103 } |
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104 |
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105 static void |
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106 octave_dld_init (void) |
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107 { |
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108 static int initialized = 0; |
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109 |
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110 if (! initialized) |
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111 { |
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112 char *full_path = 0; |
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113 |
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114 char *tmp = dld_find_executable (raw_prog_name); |
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115 if (tmp) |
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116 { |
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117 full_path = make_absolute (tmp, the_current_working_directory); |
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118 free (tmp); |
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119 } |
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120 |
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121 if (full_path) |
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122 { |
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123 int status = dld_init (full_path); |
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124 |
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125 if (status != 0) |
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126 error ("failed to load symbols from `%s'", full_path); |
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127 else |
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128 initialized = 1; |
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129 } |
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130 else |
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131 { |
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132 error ("octave_dld_init: can't find full path to `%s'", |
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133 raw_prog_name); |
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134 } |
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135 } |
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136 } |
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137 |
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138 static void |
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139 octave_list_undefined_symbols (ostream& os) |
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140 { |
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141 char **list = dld_list_undefined_sym (); |
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142 |
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143 if (list) |
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144 { |
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145 os << "undefined symbols:\n\n"; |
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146 for (int i = 0; i < dld_undefined_sym_count; i++) |
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147 os << list[i] << "\n"; |
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148 os << "\n"; |
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149 } |
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150 } |
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151 |
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152 static void * |
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153 dld_octave_resolve_reference (const char *name, const char *file = 0) |
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154 { |
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155 dld_create_reference (name); |
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156 |
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157 if (file) |
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158 { |
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159 if (dld_link (file) != 0) |
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160 { |
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161 error ("failed to link file %s", file); |
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162 return 0; |
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163 } |
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164 |
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165 if (dld_function_executable_p (name)) |
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166 return (void *) dld_get_func (name); |
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167 } |
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168 |
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169 // For each library, try to find it in a list of directories, then |
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170 // link to it. It would have been nice to use the kpathsea functions |
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171 // here too, but calls to them can't be nested as they would need to |
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172 // be here... |
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173 |
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174 char **libs = pathstring_to_vector (lib_list); |
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175 char **ptr = libs; |
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176 char *lib_list_elt; |
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177 |
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178 while ((lib_list_elt = *ptr++)) |
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179 { |
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180 char *lib = kpse_path_search (lib_dir_path, lib_list_elt, |
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181 kpathsea_true); |
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182 |
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183 if (lib && dld_link (lib) != 0) |
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184 { |
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185 error ("failed to link library %s", lib); |
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186 return 0; |
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187 } |
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188 |
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189 if (dld_function_executable_p (name)) |
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190 return (void *) dld_get_func (name); |
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191 } |
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192 |
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193 // If we get here, there was a problem. |
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194 |
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195 ostrstream output_buf; |
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196 octave_list_undefined_symbols (output_buf); |
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197 char *msg = output_buf.str (); |
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198 error (msg); |
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199 delete [] msg; |
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200 |
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201 return 0; |
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202 } |
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203 |
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204 static Octave_builtin_fcn |
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205 dld_octave_builtin (const char *name) |
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206 { |
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207 Octave_builtin_fcn retval = 0; |
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208 |
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209 char *mangled_name = mangle_octave_builtin_name (name); |
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210 |
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211 retval = (Octave_builtin_fcn) dld_octave_resolve_reference (mangled_name); |
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212 |
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213 delete [] mangled_name; |
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214 |
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215 return retval; |
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216 } |
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217 |
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218 static int |
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219 dld_octave_oct_file (const char *name) |
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220 { |
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221 char *oct_file = oct_file_in_path (name); |
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222 |
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223 if (oct_file) |
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224 { |
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225 char *mangled_name = mangle_octave_oct_file_name (name); |
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226 |
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227 Octave_builtin_fcn_struct_fcn f = |
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228 (Octave_builtin_fcn_struct_fcn) dld_octave_resolve_reference |
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229 (mangled_name, oct_file); |
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230 |
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231 if (f) |
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232 { |
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233 builtin_function *s = f (); |
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234 |
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235 if (s) |
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236 { |
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237 install_builtin_function (s); |
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238 return 1; |
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239 } |
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240 } |
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241 |
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242 delete [] oct_file; |
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243 } |
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244 |
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245 return 0; |
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246 } |
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247 |
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248 #endif |
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249 |
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250 Octave_builtin_fcn |
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251 load_octave_builtin (const char *name) |
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252 { |
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253 #ifdef WITH_DLD |
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254 return dld_octave_builtin (name); |
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255 #else |
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256 return 0; |
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257 #endif |
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258 } |
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259 |
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260 int |
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261 load_octave_oct_file (const char *name) |
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262 { |
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263 #ifdef WITH_DLD |
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264 return dld_octave_oct_file (name); |
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265 #endif |
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266 return 0; |
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267 } |
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268 |
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269 void |
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270 init_dynamic_linker (void) |
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271 { |
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272 #ifdef WITH_DLD |
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273 octave_dld_init (); |
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274 #endif |
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275 } |
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276 |
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277 // OLD: |
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278 |
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279 #if 0 |
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280 |
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281 void |
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282 octave_dld_tc2_unlink_by_symbol (const char *name, int hard) |
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283 { |
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284 // XXX FIXME XXX -- need to determine the name mangling scheme |
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285 // automatically, in case it changes, or is different on different |
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286 // systems, even if they have g++. |
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287 |
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288 char *mangled_fcn_name = strconcat (name, "__FRC13Octave_objecti"); |
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289 |
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290 int status = dld_unlink_by_symbol (mangled_fcn_name, hard); |
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291 |
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292 if (status != 0) |
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293 error ("octave_dld_tc2_unlink_by_symbol: %s", dld_strerror (0)); |
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294 |
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295 delete [] mangled_fcn_name; |
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296 } |
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297 |
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298 void |
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299 octave_dld_tc2_unlink_by_file (const char *name, int hard) |
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300 { |
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301 int status = dld_unlink_by_file (name, hard); |
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302 |
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303 if (status != 0) |
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304 error ("octave_dld_tc2_unlink_by_file: %s", dld_strerror (0)); |
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305 } |
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306 |
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307 #endif |
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308 |
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309 /* |
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310 ;;; Local Variables: *** |
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311 ;;; mode: C++ *** |
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312 ;;; page-delimiter: "^/\\*" *** |
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313 ;;; End: *** |
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314 */ |
