|
265
|
1 /* sysdll.c --- system dependent support for dynamic linked libraries
|
|
|
2 Copyright (C) 1998 Free Software Foundation, Inc.
|
|
|
3 Author: William Perry <wmperry@aventail.com>
|
|
|
4
|
|
|
5 This file is part of XEmacs.
|
|
|
6
|
|
|
7 XEmacs is free software; you can redistribute it and/or modify it
|
|
|
8 under the terms of the GNU General Public License as published by the
|
|
|
9 Free Software Foundation; either version 2, or (at your option) any
|
|
|
10 later version.
|
|
|
11
|
|
|
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
|
|
|
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
|
15 for more details.
|
|
|
16
|
|
|
17 You should have received a copy of the GNU General Public License
|
|
|
18 along with XEmacs; see the file COPYING. If not, write to the Free
|
|
|
19 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
|
|
|
20 02111-1307, USA. */
|
|
|
21
|
|
|
22 #ifdef HAVE_CONFIG_H
|
|
|
23 #include <config.h>
|
|
|
24 #endif
|
|
|
25
|
|
|
26 #include "sysdll.h"
|
|
|
27
|
|
388
|
28 /* This whole file is conditional upon HAVE_SHLIB */
|
|
265
|
29 #ifdef HAVE_SHLIB
|
|
|
30
|
|
|
31 /* Thankfully, most systems follow the ELFish dlopen() method.
|
|
|
32 ** HAVE__DLOPEN is lame, but SCO has their dl* functions as _dl*, and
|
|
|
33 ** unless you include dlfcn.h you don't get the macros to mask them, and
|
|
388
|
34 ** autoconf fails to find them. No longer true as of 5.0.5.
|
|
265
|
35 **
|
|
|
36 ** Anybody who wants to use this on SCO needs to have their configure.in
|
|
|
37 ** look for _dlopen() as well as dlopen()
|
|
|
38 */
|
|
388
|
39 #if defined(HAVE_DLOPEN) || defined(HAVE__DLOPEN) || defined(HAVE_DLFCN_H)
|
|
265
|
40 #include <dlfcn.h>
|
|
|
41
|
|
|
42 #ifndef RTLD_LAZY
|
|
276
|
43 # define RTLD_LAZY 1
|
|
265
|
44 #endif /* RTLD_LAZY isn't defined under FreeBSD - ick */
|
|
|
45
|
|
|
46 #ifndef RTLD_GLOBAL
|
|
276
|
47 # define RTLD_GLOBAL 0
|
|
265
|
48 #endif
|
|
|
49
|
|
276
|
50 int
|
|
|
51 dll_init (CONST char *arg)
|
|
|
52 {
|
|
|
53 return 0;
|
|
265
|
54 }
|
|
|
55
|
|
276
|
56 dll_handle
|
|
|
57 dll_open (CONST char *fname)
|
|
|
58 {
|
|
|
59 return (dll_handle)dlopen (fname, RTLD_LAZY | RTLD_GLOBAL);
|
|
265
|
60 }
|
|
|
61
|
|
276
|
62 int
|
|
|
63 dll_close (dll_handle h)
|
|
|
64 {
|
|
|
65 return dlclose((void *)h);
|
|
265
|
66 }
|
|
|
67
|
|
276
|
68 dll_func
|
|
|
69 dll_function (dll_handle h, CONST char *n)
|
|
|
70 {
|
|
265
|
71 #ifdef DLSYM_NEEDS_UNDERSCORE
|
|
276
|
72 char *buf = alloca_array (char, strlen (n) + 2);
|
|
|
73 *buf = '_';
|
|
|
74 (void)strcpy(buf + 1, n);
|
|
|
75 n = buf;
|
|
265
|
76 #endif
|
|
276
|
77 return (dll_func)dlsym ((void *)h, n);
|
|
265
|
78 }
|
|
|
79
|
|
276
|
80 dll_var
|
|
|
81 dll_variable (dll_handle h, CONST char *n)
|
|
|
82 {
|
|
388
|
83 #ifdef DLSYM_NEEDS_UNDERSCORE
|
|
|
84 char *buf = alloca_array (char, strlen (n) + 2);
|
|
|
85 *buf = '_';
|
|
|
86 (void)strcpy(buf + 1, n);
|
|
|
87 n = buf;
|
|
|
88 #endif
|
|
276
|
89 return (dll_var)dlsym ((void *)h, n);
|
|
265
|
90 }
|
|
|
91
|
|
276
|
92 CONST char *
|
|
|
93 dll_error (dll_handle h)
|
|
|
94 {
|
|
388
|
95 #if defined(HAVE_DLERROR) || defined(dlerror)
|
|
276
|
96 return (CONST char *)dlerror ();
|
|
388
|
97 #elif defined(HAVE__DLERROR)
|
|
|
98 return (const char *)_dlerror();
|
|
265
|
99 #else
|
|
276
|
100 return "Shared library error";
|
|
265
|
101 #endif
|
|
|
102 }
|
|
|
103
|
|
|
104 #elif defined(HAVE_SHL_LOAD)
|
|
|
105 /* This is the HP/UX version */
|
|
|
106 #include <dl.h>
|
|
276
|
107 int
|
|
|
108 dll_init (CONST char *arg)
|
|
|
109 {
|
|
|
110 return 0;
|
|
265
|
111 }
|
|
|
112
|
|
276
|
113 dll_handle
|
|
|
114 dll_open (CONST char *fname)
|
|
|
115 {
|
|
|
116 shl_t h = shl_load (fname, BIND_DEFERRED,0L);
|
|
267
|
117 shl_t *hp = NULL;
|
|
|
118
|
|
276
|
119 if (h)
|
|
|
120 {
|
|
|
121 hp = (shl_t *)malloc (sizeof (shl_t));
|
|
|
122 if (!hp)
|
|
|
123 shl_unload(h);
|
|
|
124 else
|
|
|
125 *hp = h;
|
|
267
|
126 }
|
|
276
|
127 return (dll_handle)hp;
|
|
265
|
128 }
|
|
|
129
|
|
276
|
130 int
|
|
|
131 dll_close (dll_handle h)
|
|
|
132 {
|
|
272
|
133 shl_t hp = *((shl_t *)h);
|
|
276
|
134 free (hp);
|
|
|
135 return shl_unload(h);
|
|
265
|
136 }
|
|
|
137
|
|
276
|
138 dll_func
|
|
|
139 dll_function (dll_handle h, CONST char *n)
|
|
|
140 {
|
|
265
|
141 long handle = 0L;
|
|
|
142
|
|
276
|
143 if (shl_findsym ((shl_t *)h, n, TYPE_PROCEDURE, &handle))
|
|
|
144 return NULL;
|
|
265
|
145
|
|
276
|
146 return (dll_func)handle;
|
|
265
|
147 }
|
|
|
148
|
|
276
|
149 dll_var
|
|
|
150 dll_variable (dll_handle h, CONST char *n)
|
|
|
151 {
|
|
265
|
152 long handle = 0L;
|
|
|
153
|
|
276
|
154 if (shl_findsym ((shl_t *)h, n, TYPE_DATA, &handle))
|
|
|
155 return NULL;
|
|
265
|
156
|
|
276
|
157 return (dll_var)handle;
|
|
265
|
158 }
|
|
|
159
|
|
276
|
160 CONST char *
|
|
|
161 dll_error (dll_handle h)
|
|
|
162 {
|
|
|
163 /* #### WTF?! Shouldn't this at least attempt to get strerror or
|
|
|
164 something? --hniksic */
|
|
|
165 return "Generic shared library error";
|
|
265
|
166 }
|
|
|
167
|
|
|
168 #elif defined(HAVE_INIT_DLD)
|
|
|
169 #include <dld.h>
|
|
276
|
170 int
|
|
|
171 dll_init (CONST char *arg)
|
|
|
172 {
|
|
|
173 char *real_exe = dld_find_executable (arg);
|
|
265
|
174 int rc;
|
|
|
175
|
|
276
|
176 rc = dld_init (real_exe);
|
|
|
177 if (rc)
|
|
|
178 {
|
|
|
179 dld_perror (exe);
|
|
|
180 return -1;
|
|
|
181 }
|
|
|
182 return 0;
|
|
265
|
183 }
|
|
|
184
|
|
276
|
185 dll_handle
|
|
|
186 dll_open (CONST char *fname)
|
|
|
187 {
|
|
|
188 rc = dld_link (fname);
|
|
|
189 if (rc)
|
|
|
190 return NULL;
|
|
|
191
|
|
|
192 return (dll_handle)1;
|
|
265
|
193 }
|
|
|
194
|
|
276
|
195 int
|
|
|
196 dll_close (dll_handle h)
|
|
|
197 {
|
|
265
|
198 /* *sigh* DLD is pretty lame and doesn't return a handle that you can use
|
|
|
199 ** later on to free the file - you have to remember the filename and
|
|
|
200 ** use that as the unlinker. We should eventually keep a linked list
|
|
|
201 ** of loaded modules and then use the node pointer as the unique id
|
|
|
202 ** for the shared library. Wheeee. But not now.
|
|
|
203 */
|
|
276
|
204 return 1;
|
|
265
|
205 }
|
|
|
206
|
|
276
|
207 DLL_FUNC
|
|
|
208 dll_function (dll_handle h, CONST char *n)
|
|
|
209 {
|
|
|
210 return dld_get_func(n);
|
|
265
|
211 }
|
|
|
212
|
|
276
|
213 DLL_FUNC
|
|
|
214 dll_variable (dll_handle h, CONST char *n)
|
|
|
215 {
|
|
|
216 return dld_get_symbol(n);
|
|
265
|
217 }
|
|
|
218 #elif defined(_WINDOWS) || defined(WIN32)
|
|
276
|
219 int
|
|
|
220 dll_init (CONST char *arg)
|
|
|
221 {
|
|
|
222 return 0;
|
|
265
|
223 }
|
|
|
224
|
|
276
|
225 dll_handle
|
|
|
226 dll_open (CONST char *fname)
|
|
|
227 {
|
|
|
228 return (dll_handle)LoadLibrary (fname);
|
|
265
|
229 }
|
|
|
230
|
|
276
|
231 int
|
|
|
232 dll_close (dll_handle h)
|
|
|
233 {
|
|
|
234 return FreeLibrary (h);
|
|
265
|
235 }
|
|
|
236
|
|
276
|
237 dll_func
|
|
|
238 dll_function (dll_handle h, CONST char *n)
|
|
|
239 {
|
|
|
240 return (dll_func)GetProcAddress (h,n);
|
|
265
|
241 }
|
|
|
242
|
|
276
|
243 dll_func
|
|
|
244 dll_variable (dll_handle h, CONST char *n)
|
|
|
245 {
|
|
|
246 return (dll_func)GetProcAddress (h,n);
|
|
265
|
247 }
|
|
|
248
|
|
276
|
249 CONST char *
|
|
|
250 dll_error (dll_handle h)
|
|
|
251 {
|
|
|
252 return "Windows DLL Error";
|
|
265
|
253 }
|
|
|
254 #else
|
|
|
255 /* Catchall if we don't know about this systems method of dynamic loading */
|
|
276
|
256 int
|
|
|
257 dll_init (CONST char *arg)
|
|
|
258 {
|
|
|
259 return -1;
|
|
265
|
260 }
|
|
|
261
|
|
276
|
262 dll_handle
|
|
|
263 dll_open (CONST char *fname)
|
|
|
264 {
|
|
|
265 return NULL;
|
|
265
|
266 }
|
|
|
267
|
|
276
|
268 int
|
|
|
269 dll_close (dll_handle h)
|
|
|
270 {
|
|
|
271 return 0;
|
|
265
|
272 }
|
|
|
273
|
|
276
|
274 dll_func
|
|
|
275 dll_function (dll_handle h, CONST char *n)
|
|
|
276 {
|
|
|
277 return NULL;
|
|
265
|
278 }
|
|
|
279
|
|
276
|
280 dll_func
|
|
|
281 dll_variable (dll_handle h, CONST char *n)
|
|
|
282 {
|
|
|
283 return NULL;
|
|
265
|
284 }
|
|
|
285
|
|
276
|
286 CONST char *
|
|
|
287 dll_error (dll_handle h)
|
|
|
288 {
|
|
|
289 return "Shared libraries not implemented on this system";
|
|
265
|
290 }
|
|
|
291 #endif /* System conditionals */
|
|
|
292
|
|
|
293 #endif /* HAVE_SHLIB */
|
