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428
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1 /* sysdll.c --- system dependent support for dynamic linked libraries
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2 Copyright (C) 1998 Free Software Foundation, Inc.
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3 Author: William Perry <wmperry@aventail.com>
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4
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5 This file is part of XEmacs.
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6
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to the Free
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19 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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20 02111-1307, USA. */
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21
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22 #ifdef HAVE_CONFIG_H
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23 #include <config.h>
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24 #endif
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25
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430
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26 #include <stdlib.h>
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1272
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27 #include "lisp.h"
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428
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28 #include "sysdll.h"
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29
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1383
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30 #ifdef DLSYM_NEEDS_UNDERSCORE
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31 #define MAYBE_PREPEND_UNDERSCORE(n) do { \
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1706
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32 CIbyte *buf = alloca_array (CIbyte, strlen (n) + 2); \
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1383
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33 *buf = '_'; \
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34 strcpy (buf + 1, n); \
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35 n = buf; \
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36 } while (0)
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37 #else
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38 #define MAYBE_PREPEND_UNDERSCORE(n)
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39 #endif
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40
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428
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41 /* This whole file is conditional upon HAVE_SHLIB */
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42 #ifdef HAVE_SHLIB
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43
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44 /* Thankfully, most systems follow the ELFish dlopen() method.
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45 */
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452
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46 #if defined(HAVE_DLOPEN)
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428
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47 #include <dlfcn.h>
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48
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49 #ifndef RTLD_LAZY
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1383
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50 # ifdef DL_LAZY
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51 # define RTLD_LAZY DL_LAZY
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52 # else
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53 # define RTLD_LAZY 1
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54 # endif
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428
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55 #endif /* RTLD_LAZY isn't defined under FreeBSD - ick */
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56
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863
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57 #ifndef RTLD_NOW
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1383
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58 # ifdef DL_NOW
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59 # define RTLD_NOW DL_NOW
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60 # else
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61 # define RTLD_NOW 2
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62 # endif
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863
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63 #endif
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64
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428
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65 int
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1706
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66 dll_init (const Extbyte *arg)
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428
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67 {
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68 return 0;
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69 }
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70
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71 dll_handle
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1706
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72 dll_open (Lisp_Object fname)
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428
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73 {
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1706
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74 Extbyte *soname;
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75
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76 if (NILP (fname))
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77 {
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78 soname = NULL;
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79 }
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80 else
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81 {
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82 LISP_STRING_TO_EXTERNAL (fname, soname, Qdll_filename_encoding);
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83 }
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84 return (dll_handle) dlopen (soname, RTLD_NOW);
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428
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85 }
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86
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87 int
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88 dll_close (dll_handle h)
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89 {
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442
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90 return dlclose ((void *) h);
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428
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91 }
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92
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93 dll_func
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1706
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94 dll_function (dll_handle h, const CIbyte *n)
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428
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95 {
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1383
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96 MAYBE_PREPEND_UNDERSCORE (n);
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442
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97 return (dll_func) dlsym ((void *) h, n);
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428
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98 }
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99
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100 dll_var
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1706
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101 dll_variable (dll_handle h, const CIbyte *n)
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428
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102 {
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1383
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103 MAYBE_PREPEND_UNDERSCORE (n);
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428
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104 return (dll_var)dlsym ((void *)h, n);
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105 }
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106
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1706
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107 Lisp_Object
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428
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108 dll_error (dll_handle h)
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109 {
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1706
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110 const Extbyte *msg;
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428
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111 #if defined(HAVE_DLERROR) || defined(dlerror)
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1706
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112 msg = (const Extbyte *) dlerror ();
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428
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113 #elif defined(HAVE__DLERROR)
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1706
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114 msg = (const Extbyte *) _dlerror();
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428
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115 #else
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1706
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116 msg = (const Extbyte *) "Shared library error";
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428
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117 #endif
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1706
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118 return build_ext_string (msg, Qnative);
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428
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119 }
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120
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121 #elif defined(HAVE_SHL_LOAD)
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122 /* This is the HP/UX version */
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123 #include <dl.h>
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124 int
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1706
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125 dll_init (const Extbyte *arg)
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428
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126 {
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127 return 0;
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128 }
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129
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130 dll_handle
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1706
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131 dll_open (Lisp_Object fname)
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428
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132 {
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1706
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133 Extbyte *soname;
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428
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134
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1706
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135 if (NILP (fname))
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136 {
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137 soname = NULL;
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138 }
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139 else
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140 {
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141 LISP_STRING_TO_EXTERNAL (fname, soname, Qdll_filename_encoding);
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142 }
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143 return (dll_handle) shl_load (soname, BIND_DEFERRED, 0L);
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428
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144 }
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145
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146 int
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147 dll_close (dll_handle h)
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148 {
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442
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149 return shl_unload ((shl_t) h);
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428
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150 }
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151
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152 dll_func
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1706
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153 dll_function (dll_handle h, const CIbyte *n)
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428
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154 {
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155 long handle = 0L;
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156
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442
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157 if (shl_findsym ((shl_t *) &h, n, TYPE_PROCEDURE, &handle))
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428
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158 return NULL;
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159
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442
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160 return (dll_func) handle;
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428
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161 }
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162
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163 dll_var
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1706
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164 dll_variable (dll_handle h, const CIbyte *n)
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428
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165 {
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166 long handle = 0L;
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167
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442
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168 if (shl_findsym ((shl_t *) &h, n, TYPE_DATA, &handle))
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428
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169 return NULL;
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170
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442
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171 return (dll_var) handle;
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428
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172 }
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173
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1706
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174 Lisp_Object
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428
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175 dll_error (dll_handle h)
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176 {
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177 /* #### WTF?! Shouldn't this at least attempt to get strerror or
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178 something? --hniksic */
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1706
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179 return build_string ("Generic shared library error", Qnative);
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428
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180 }
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181
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1632
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182 #elif defined (WIN32_NATIVE) || defined (CYGWIN)
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442
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183
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1632
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184 #include "syswindows.h"
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185 #include "sysfile.h"
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442
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186
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428
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187 int
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1706
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188 dll_init (const Extbyte *arg)
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428
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189 {
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190 return 0;
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191 }
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192
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193 dll_handle
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1706
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194 dll_open (Lisp_Object fname)
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428
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195 {
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1706
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196 Extbyte *soname;
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197
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198 if (NILP (fname))
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199 {
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200 soname = NULL;
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201 }
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202 else
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203 {
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204 LOCAL_FILE_FORMAT_TO_TSTR (fname, soname);
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205 }
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206 return (dll_handle) qxeLoadLibrary (soname);
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428
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207 }
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208
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209 int
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210 dll_close (dll_handle h)
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211 {
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1706
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212 return FreeLibrary ((HMODULE) h);
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428
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213 }
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214
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215 dll_func
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1706
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216 dll_function (dll_handle h, const CIbyte *n)
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428
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217 {
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1706
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218 return (dll_func) GetProcAddress ((HINSTANCE) h, n);
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428
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219 }
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220
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221 dll_func
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1706
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222 dll_variable (dll_handle h, const CIbyte *n)
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428
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223 {
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1706
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224 return (dll_func) GetProcAddress ((HINSTANCE) h, n);
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428
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225 }
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226
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1706
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227 Lisp_Object
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428
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228 dll_error (dll_handle h)
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229 {
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1706
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230 CIbyte err[32];
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231 snprintf (err, 32, "Windows DLL Error %lu", GetLastError ());
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232 return build_string (err);
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428
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233 }
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1383
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234 #elif defined(HAVE_DYLD)
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235 /* This section supports MacOSX dynamic libraries. Dynamically
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236 loadable libraries must be compiled as bundles, not dynamiclibs.
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237 */
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238
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239 #include <mach-o/dyld.h>
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240
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241 int
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1706
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242 dll_init (const Extbyte *arg)
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1383
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243 {
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244 return 0;
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245 }
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246
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247 dll_handle
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1706
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248 dll_open (Lisp_Object fname)
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1383
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249 {
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1706
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250 Extbyte *soname;
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1383
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251 NSObjectFileImage file;
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1418
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252 NSModule out;
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1706
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253 NSObjectFileImageReturnCode ret;
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254
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255 if (NILP (fname))
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256 {
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257 soname = NULL;
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258 }
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259 else
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260 {
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261 LISP_STRING_TO_EXTERNAL (fname, soname, Qdll_filename_encoding);
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262 }
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263 ret = NSCreateObjectFileImageFromFile(soname, &file);
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1383
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264 if (ret != NSObjectFileImageSuccess) {
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265 return NULL;
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266 }
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1706
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267 out = NSLinkModule(file, soname,
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1418
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268 NSLINKMODULE_OPTION_BINDNOW |
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269 NSLINKMODULE_OPTION_PRIVATE |
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270 NSLINKMODULE_OPTION_RETURN_ON_ERROR);
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1383
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271 return (dll_handle)out;
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272 }
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273
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274 int
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275 dll_close (dll_handle h)
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276 {
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277 return NSUnLinkModule((NSModule)h, NSUNLINKMODULE_OPTION_NONE);
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278 }
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279
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280 dll_func
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1706
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281 dll_function (dll_handle h, const CIbyte *n)
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1383
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282 {
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283 NSSymbol sym;
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284 MAYBE_PREPEND_UNDERSCORE (n);
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285 sym = NSLookupSymbolInModule((NSModule)h, n);
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286 if (sym == 0) return 0;
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287 return (dll_func)NSAddressOfSymbol(sym);
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288 }
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289
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290 dll_var
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1706
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291 dll_variable (dll_handle h, const CIbyte *n)
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1383
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292 {
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293 NSSymbol sym;
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294 MAYBE_PREPEND_UNDERSCORE (n);
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295 sym = NSLookupSymbolInModule((NSModule)h, n);
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296 if (sym == 0) return 0;
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297 return (dll_var)NSAddressOfSymbol(sym);
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298 }
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299
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1706
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300 Lisp_Object
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1383
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301 dll_error (dll_handle h)
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302 {
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303 NSLinkEditErrors c;
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304 int errorNumber;
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1706
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305 const CIbyte *fileNameWithError, *errorString;
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1383
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306 NSLinkEditError(&c, &errorNumber, &fileNameWithError, &errorString);
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1706
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307 return build_ext_string (errorString, Qnative);
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1383
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308 }
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428
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309 #else
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1706
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310 /* Catchall if we don't know about this system's method of dynamic loading */
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428
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311 int
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1706
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312 dll_init (const Extbyte *arg)
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428
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313 {
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314 return -1;
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315 }
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316
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317 dll_handle
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1706
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318 dll_open (Lisp_Object fname)
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428
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319 {
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320 return NULL;
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321 }
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322
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323 int
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324 dll_close (dll_handle h)
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325 {
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326 return 0;
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327 }
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328
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329 dll_func
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1706
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330 dll_function (dll_handle h, const CIbyte *n)
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428
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331 {
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332 return NULL;
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333 }
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334
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335 dll_func
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1706
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336 dll_variable (dll_handle h, const CIbyte *n)
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428
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337 {
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338 return NULL;
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339 }
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340
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1706
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341 Lisp_Object
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428
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342 dll_error (dll_handle h)
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343 {
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1706
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344 return build_string ("Shared libraries not implemented on this system");
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428
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345 }
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346 #endif /* System conditionals */
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347
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348 #endif /* HAVE_SHLIB */
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