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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 "octave.h" |
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46 #include "utils.h" |
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47 #include "error.h" |
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48 |
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49 typedef builtin_function * (*Octave_builtin_fcn_struct_fcn)(void); |
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50 |
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51 // XXX FIXME XXX -- should this list be in a user-level variable, |
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52 // with default taken from the environment? |
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53 |
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54 #ifndef STD_LIB_PATH |
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55 #define STD_LIB_PATH "/lib:/usr/lib:/usr/local/lib" |
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56 #endif |
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57 |
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58 #ifndef OCTAVE_LIB_PATH |
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59 #define OCTAVE_LIB_PATH OCTAVE_LIBDIR ":" FLIB_PATH ":" CXXLIB_PATH |
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60 #endif |
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61 |
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62 static char *lib_dir_path = OCTAVE_LIB_PATH ":" STD_LIB_PATH; |
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63 |
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64 // This is the list of interesting libraries that Octave is linked |
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65 // with. Maybe it should include the readline, info, and kpathsea |
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66 // libraries. Would there ever be a time that they would really be |
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67 // needed? |
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68 |
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69 #ifndef SYSTEM_LIB_LIST |
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70 #define SYSTEM_LIB_LIST "libtermcap.a:libm.a" ":" CXXLIB_LIST |
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71 #endif |
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72 |
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73 #ifndef OCTAVE_LIB_LIST |
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74 #define OCTAVE_LIB_LIST "liboctdld.a:liboctave.a:libcruft.a:libdld.a" |
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75 #endif |
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76 |
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77 static char *lib_list = OCTAVE_LIB_LIST ":" FLIB_LIST ":" SYSTEM_LIB_LIST; |
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78 |
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79 static char * |
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80 mangle_octave_builtin_name (const char *name) |
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81 { |
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82 char *tmp = strconcat (name, "__FRC13Octave_objecti"); |
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83 char *retval = strconcat ("F", tmp); |
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84 delete [] tmp; |
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85 return retval; |
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86 } |
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87 |
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88 static char * |
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89 mangle_octave_oct_file_name (const char *name) |
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90 { |
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91 char *tmp = strconcat (name, "__Fv"); |
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92 char *retval = strconcat ("FS", tmp); |
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93 delete [] tmp; |
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94 return retval; |
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95 } |
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96 |
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97 #ifdef WITH_DLD |
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98 |
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99 static void |
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100 octave_dld_init (void) |
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101 { |
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102 static int initialized = 0; |
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103 |
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104 if (! initialized) |
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105 { |
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106 char *full_path = dld_find_executable (raw_prog_name); |
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107 |
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108 if (full_path) |
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109 { |
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110 int status = dld_init (full_path); |
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111 |
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112 if (status != 0) |
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113 error ("failed to load symbols from `%s'", full_path); |
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114 else |
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115 initialized = 1; |
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116 } |
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117 else |
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118 error ("octave_dld_init: can't find full path to `%s'", prog_name); |
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119 } |
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120 } |
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121 |
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122 static void |
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123 octave_list_undefined_symbols (ostream& os) |
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124 { |
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125 char **list = dld_list_undefined_sym (); |
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126 |
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127 if (list) |
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128 { |
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129 os << "undefined symbols:\n\n"; |
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130 for (int i = 0; i < dld_undefined_sym_count; i++) |
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131 os << list[i] << "\n"; |
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132 os << "\n"; |
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133 } |
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134 } |
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135 |
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136 static void * |
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137 dld_octave_resolve_reference (const char *name, const char *file = 0) |
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138 { |
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139 dld_create_reference (name); |
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140 |
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141 if (file) |
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142 { |
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143 if (dld_link (file) != 0) |
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144 { |
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145 error ("failed to link file %s", file); |
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146 return 0; |
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147 } |
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148 |
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149 if (dld_function_executable_p (name)) |
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150 return (void *) dld_get_func (name); |
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151 } |
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152 |
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153 // For each library, try to find it in a list of directories, then |
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154 // link to it. It would have been nice to use the kpathsea functions |
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155 // here too, but calls to them can't be nested as they would need to |
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156 // be here... |
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157 |
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158 char **libs = pathstring_to_vector (lib_list); |
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159 char **ptr = libs; |
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160 char *lib_list_elt; |
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161 |
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162 while ((lib_list_elt = *ptr++)) |
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163 { |
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164 char *lib = kpse_path_search (lib_dir_path, lib_list_elt, |
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165 kpathsea_true); |
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166 |
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167 if (lib && dld_link (lib) != 0) |
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168 { |
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169 error ("failed to link library %s", lib); |
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170 return 0; |
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171 } |
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172 |
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173 if (dld_function_executable_p (name)) |
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174 return (void *) dld_get_func (name); |
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175 } |
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176 |
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177 // If we get here, there was a problem. |
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178 |
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179 ostrstream output_buf; |
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180 octave_list_undefined_symbols (output_buf); |
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181 char *msg = output_buf.str (); |
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182 error (msg); |
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183 delete [] msg; |
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184 |
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185 return 0; |
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186 } |
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187 |
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188 static Octave_builtin_fcn |
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189 dld_octave_builtin (const char *name) |
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190 { |
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191 Octave_builtin_fcn retval = 0; |
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192 |
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193 char *mangled_name = mangle_octave_builtin_name (name); |
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194 |
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195 retval = (Octave_builtin_fcn) dld_octave_resolve_reference (mangled_name); |
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196 |
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197 delete [] mangled_name; |
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198 |
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199 return retval; |
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200 } |
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201 |
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202 static int |
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203 dld_octave_oct_file (const char *name) |
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204 { |
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205 char *oct_file = oct_file_in_path (name); |
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206 |
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207 if (oct_file) |
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208 { |
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209 char *mangled_name = mangle_octave_oct_file_name (name); |
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210 |
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211 Octave_builtin_fcn_struct_fcn f = |
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212 (Octave_builtin_fcn_struct_fcn) dld_octave_resolve_reference |
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213 (mangled_name, oct_file); |
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214 |
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215 if (f) |
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216 { |
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217 builtin_function *s = f (); |
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218 |
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219 if (s) |
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220 { |
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221 install_builtin_function (s); |
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222 return 1; |
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223 } |
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224 } |
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225 |
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226 delete [] oct_file; |
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227 } |
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228 |
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229 return 0; |
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230 } |
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231 |
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232 #endif |
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233 |
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234 Octave_builtin_fcn |
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235 load_octave_builtin (const char *name) |
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236 { |
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237 #ifdef WITH_DLD |
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238 return dld_octave_builtin (name); |
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239 #else |
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240 return 0; |
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241 #endif |
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242 } |
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243 |
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244 int |
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245 load_octave_oct_file (const char *name) |
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246 { |
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247 #ifdef WITH_DLD |
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248 return dld_octave_oct_file (name); |
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249 #endif |
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250 return 0; |
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251 } |
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252 |
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253 void |
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254 init_dynamic_linker (void) |
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255 { |
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256 #ifdef WITH_DLD |
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257 octave_dld_init (); |
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258 #endif |
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259 } |
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260 |
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261 // OLD: |
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262 |
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263 #if 0 |
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264 |
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265 void |
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266 octave_dld_tc2_unlink_by_symbol (const char *name, int hard) |
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267 { |
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268 // XXX FIXME XXX -- need to determine the name mangling scheme |
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269 // automatically, in case it changes, or is different on different |
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270 // systems, even if they have g++. |
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271 |
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272 char *mangled_fcn_name = strconcat (name, "__FRC13Octave_objecti"); |
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273 |
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274 int status = dld_unlink_by_symbol (mangled_fcn_name, hard); |
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275 |
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276 if (status != 0) |
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277 dld_perror ("octave_dld_tc2_unlink_by_symbol"); |
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278 |
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279 delete [] mangled_fcn_name; |
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280 } |
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281 |
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282 void |
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283 octave_dld_tc2_unlink_by_file (const char *name, int hard) |
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284 { |
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285 int status = dld_unlink_by_file (name, hard); |
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286 |
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287 if (status != 0) |
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288 dld_perror ("octave_dld_tc2_unlink_by_file"); |
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289 } |
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290 |
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291 // Look for object in path. It should provide a definition for the |
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292 // function we just marked as undefined. If we find it, we'll also |
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293 // try to load the remaining undefined symbols. |
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294 |
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295 static int |
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296 octave_dld_link (const char *object) |
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297 { |
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298 char *file = file_in_path (object, 0); |
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299 |
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300 int status = dld_link (file); |
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301 |
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302 if (status != 0) |
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303 dld_perror ("octave_dld_link"); |
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304 |
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305 return status; |
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306 } |
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307 |
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308 int |
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309 octave_dld_tc2_link (const char *object) |
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310 { |
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311 static char *ol = octave_lib_dir (); |
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312 static char *liboctave = strconcat (ol, "/liboctave.a"); |
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313 static char *libcruft = strconcat (ol, "/libcruft.a"); |
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314 |
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315 int status = octave_dld_link (object); |
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316 |
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317 if (status == 0) |
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318 { |
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319 status = octave_dld_link (liboctave); |
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320 |
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321 if (status == 0) |
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322 octave_dld_link (libcruft); |
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323 } |
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324 |
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325 return status; |
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326 } |
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327 |
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328 Octave_builtin_fcn |
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329 octave_dld_tc2 (const char *name) |
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330 { |
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331 Octave_builtin_fcn retval = 0; |
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332 |
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333 octave_dld_init (); |
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334 |
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335 // XXX FIXME XXX -- need to determine the name mangling scheme |
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336 // automatically, in case it changes, or is different on different |
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337 // systems, even if they have g++. |
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338 char *mangled_fcn_name = strconcat (name, "__FRC13Octave_objecti"); |
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339 |
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340 // See if the function has already been loaded. If not, mark it as |
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341 // undefined. |
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342 |
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343 if (dld_get_func (mangled_fcn_name) == 0) |
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344 dld_create_reference (mangled_fcn_name); |
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345 |
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346 static char *ol = octave_lib_dir (); |
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347 static char *liboctdld = strconcat (ol, "/liboctdld.a"); |
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348 |
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349 int status = octave_dld_tc2_link (liboctdld); |
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350 |
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351 if (status == 0) |
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352 { |
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353 // Return a pointer to the function we just loaded. If we can\'t find |
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354 // it, this will return NULL. |
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355 |
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356 retval = (Octave_builtin_fcn) dld_get_func (mangled_fcn_name); |
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357 } |
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358 |
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359 delete [] mangled_fcn_name; |
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360 |
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361 return retval; |
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362 |
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363 } |
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364 |
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365 Octave_object |
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366 octave_dld_tc2_and_go (const Octave_object& args, int nargout, |
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367 const char *name) |
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368 { |
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369 Octave_object retval; |
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370 |
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371 Octave_builtin_fcn fcn_to_call = octave_dld_tc2 (name); |
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372 |
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373 if (fcn_to_call) |
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374 retval = (*fcn_to_call) (args, nargout); |
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375 else |
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376 error ("octave_dld_tc2_and_go: failed to load `%s'", name); |
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377 |
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378 return retval; |
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379 } |
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380 |
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381 #endif |
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382 |
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383 /* |
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384 ;;; Local Variables: *** |
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385 ;;; mode: C++ *** |
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386 ;;; page-delimiter: "^/\\*" *** |
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387 ;;; End: *** |
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388 */ |
