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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 extern "C" |
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29 { |
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30 #include "dld/dld.h" |
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31 } |
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32 |
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33 #include "dynamic-ld.h" |
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34 #include "tree-const.h" |
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35 #include "user-prefs.h" |
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36 #include "octave.h" |
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37 #include "utils.h" |
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38 #include "error.h" |
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39 |
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40 void |
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41 octave_dld_tc2_unlink_by_symbol (const char *name, int hard = 1) |
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42 { |
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43 // XXX FIXME XXX -- need to determine the name mangling scheme |
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44 // automatically, in case it changes, or is different on different |
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45 // systems, even if they have g++. |
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46 char *mangled_fcn_name = strconcat (name, "__FRC13Octave_objecti"); |
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47 int status = dld_unlink_by_symbol (mangled_fcn_name, hard); |
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48 if (status != 0) |
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49 dld_perror ("octave_dld_tc2_unlink_by_symbol"); |
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50 delete [] mangled_fcn_name; |
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51 } |
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52 |
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53 void |
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54 octave_dld_tc2_unlink_by_file (const char *name, int hard = 1) |
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55 { |
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56 int status = dld_unlink_by_file (name, hard); |
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57 if (status != 0) |
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58 dld_perror ("octave_dld_tc2_unlink_by_file"); |
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59 } |
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60 |
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61 static void |
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62 octave_dld_init (void) |
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63 { |
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64 static int initialized = 0; |
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65 |
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66 if (! initialized) |
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67 { |
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68 char *full_path = dld_find_executable (raw_prog_name); |
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69 if (full_path) |
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70 { |
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71 int status = dld_init (full_path); |
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72 if (status != 0) |
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73 { |
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74 dld_perror ("octave_dld_tc2_and_go"); |
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75 error ("failed to load symbols from `%s'", full_path); |
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76 } |
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77 else |
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78 initialized = 1; |
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79 } |
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80 else |
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81 error ("octave_dld_tc2_and_go: can't find full path to `%s'", |
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82 prog_name); |
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83 } |
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84 } |
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85 |
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86 /* |
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87 * Look for object in path. It should provide a definition for the |
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88 * function we just marked as undefined. If we find it, we\'ll also |
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89 * try to load the remaining undefined symbols. |
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90 */ |
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91 static int |
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92 octave_dld_link (const char *object) |
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93 { |
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94 char *file = file_in_path (object, 0); |
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95 int status = dld_link (file); |
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96 if (status != 0) |
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97 dld_perror ("octave_dld_link"); |
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98 |
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99 delete [] file; |
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100 return status; |
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101 } |
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102 |
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103 int |
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104 octave_dld_tc2_link (const char *object) |
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105 { |
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106 int status = octave_dld_link (object); |
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107 if (status == 0) |
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108 { |
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109 // XXX FIXME XXX -- this obviously won't work everywhere... |
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110 char *octave_lib = "/home/jwe/src/octave/sun4-dld/liboctave.a"; |
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111 status = octave_dld_link (octave_lib); |
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112 if (status == 0) |
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113 { |
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114 // XXX FIXME XXX -- this obviously won't work everywhere... |
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115 char *cruft_library = "/home/jwe/src/octave/sun4-dld/libcruft.a"; |
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116 octave_dld_link (cruft_library); |
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117 } |
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118 } |
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119 return status; |
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120 } |
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121 |
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122 builtin_fcn_ptr |
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123 octave_dld_tc2 (const char *name, const char *fcn) |
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124 { |
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125 builtin_fcn_ptr retval = 0; |
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126 |
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127 octave_dld_init (); |
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128 |
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129 // XXX FIXME XXX -- need to determine the name mangling scheme |
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130 // automatically, in case it changes, or is different on different |
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131 // systems, even if they have g++. |
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132 char *mangled_fcn_name = strconcat (fcn, "__FRC13Octave_objecti"); |
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133 |
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134 // See if the function has already been loaded. If not, mark it as |
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135 // undefined. |
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136 |
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137 if (dld_get_func (mangled_fcn_name) == 0) |
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138 dld_create_reference (mangled_fcn_name); |
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139 |
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140 // XXX FIXME XXX -- this obviously won't work everywhere... |
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141 char *octave_dld_library = "/home/jwe/src/octave/sun4-dld/liboctdld.a"; |
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142 int status = octave_dld_tc2_link (octave_dld_library); |
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143 if (status == 0) |
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144 { |
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145 // Return a pointer to the function we just loaded. If we can\'t find |
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146 // it, this will return NULL. |
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147 |
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148 retval = (builtin_fcn_ptr) dld_get_func (mangled_fcn_name); |
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149 } |
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150 |
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151 delete [] mangled_fcn_name; |
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152 |
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153 return retval; |
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154 |
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155 } |
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156 |
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157 Octave_object |
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158 octave_dld_tc2_and_go (const Octave_object& args, int nargout, |
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159 const char *name, const char *fcn) |
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160 { |
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161 Octave_object retval; |
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162 |
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163 builtin_fcn_ptr fcn_to_call = octave_dld_tc2 (name, fcn); |
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164 |
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165 if (fcn_to_call) |
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166 retval = (*fcn_to_call) (args, nargout); |
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167 else |
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168 error ("octave_dld_tc2_and_go: failed to load `%s'", name); |
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169 |
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170 return retval; |
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171 } |
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172 |
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173 /* |
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174 ;;; Local Variables: *** |
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175 ;;; mode: C++ *** |
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176 ;;; page-delimiter: "^/\\*" *** |
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177 ;;; End: *** |
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178 */ |
