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1 | /* dynl-dl.c - dynamic linking for dlopen/dlsym |
2 | * | |
7dc6e754 | 3 | * Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc. |
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4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2, or (at your option) | |
8 | * any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
17 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
18 | * Boston, MA 02111-1307 USA | |
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19 | * |
20 | * As a special exception, the Free Software Foundation gives permission | |
21 | * for additional uses of the text contained in its release of GUILE. | |
22 | * | |
23 | * The exception is that, if you link the GUILE library with other files | |
24 | * to produce an executable, this does not by itself cause the | |
25 | * resulting executable to be covered by the GNU General Public License. | |
26 | * Your use of that executable is in no way restricted on account of | |
27 | * linking the GUILE library code into it. | |
28 | * | |
29 | * This exception does not however invalidate any other reasons why | |
30 | * the executable file might be covered by the GNU General Public License. | |
31 | * | |
32 | * This exception applies only to the code released by the | |
33 | * Free Software Foundation under the name GUILE. If you copy | |
34 | * code from other Free Software Foundation releases into a copy of | |
35 | * GUILE, as the General Public License permits, the exception does | |
36 | * not apply to the code that you add in this way. To avoid misleading | |
37 | * anyone as to the status of such modified files, you must delete | |
38 | * this exception notice from them. | |
39 | * | |
40 | * If you write modifications of your own for GUILE, it is your choice | |
41 | * whether to permit this exception to apply to your modifications. | |
82892bed | 42 | * If you do not wish that, delete this exception notice. */ |
1edae076 MV |
43 | |
44 | /* "dynl.c" dynamically link&load object files. | |
45 | Author: Aubrey Jaffer | |
46 | Modified for libguile by Marius Vollmer */ | |
47 | ||
1edae076 MV |
48 | #include <dlfcn.h> |
49 | ||
1edae076 MV |
50 | #ifdef RTLD_LAZY /* Solaris 2. */ |
51 | # define DLOPEN_MODE RTLD_LAZY | |
52 | #else | |
53 | # define DLOPEN_MODE 1 /* Thats what it says in the man page. */ | |
54 | #endif | |
55 | ||
80bc7890 MV |
56 | static void * |
57 | sysdep_dynl_link (fname, subr) | |
58 | char *fname; | |
59 | char *subr; | |
1edae076 | 60 | { |
80bc7890 MV |
61 | void *handle = dlopen (fname, DLOPEN_MODE); |
62 | if (NULL == handle) | |
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63 | { |
64 | SCM_ALLOW_INTS; | |
80bc7890 | 65 | scm_misc_error (subr, (char *)dlerror (), SCM_EOL); |
419e9e11 | 66 | } |
80bc7890 | 67 | return handle; |
1edae076 MV |
68 | } |
69 | ||
80bc7890 MV |
70 | static void |
71 | sysdep_dynl_unlink (handle, subr) | |
72 | void *handle; | |
73 | char *subr; | |
1edae076 | 74 | { |
419e9e11 MV |
75 | if (dlclose (handle)) |
76 | { | |
77 | SCM_ALLOW_INTS; | |
80bc7890 | 78 | scm_misc_error (subr, (char *)dlerror (), SCM_EOL); |
419e9e11 | 79 | } |
1edae076 | 80 | } |
80bc7890 | 81 | |
1edae076 | 82 | static void * |
80bc7890 MV |
83 | sysdep_dynl_func (symb, handle, subr) |
84 | char *symb; | |
1edae076 | 85 | void *handle; |
1edae076 MV |
86 | char *subr; |
87 | { | |
88 | void *fptr; | |
89 | char *err; | |
cda139a7 | 90 | #if defined(USCORE) && !defined(DLSYM_ADDS_USCORE) |
2a0d7176 | 91 | char *usymb; |
cda139a7 | 92 | #endif |
1edae076 | 93 | |
e085f7a6 | 94 | #if defined(USCORE) && !defined(DLSYM_ADDS_USCORE) |
0113293e | 95 | usymb = (char *) malloc (strlen (symb) + 2); |
2a0d7176 TP |
96 | *usymb = '_'; |
97 | strcpy (usymb + 1, symb); | |
0113293e TP |
98 | fptr = dlsym (handle, usymb); |
99 | free (usymb); | |
e085f7a6 TP |
100 | #else |
101 | fptr = dlsym (handle, symb); | |
2a0d7176 TP |
102 | #endif |
103 | ||
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104 | err = (char *)dlerror (); |
105 | if (!fptr) | |
419e9e11 MV |
106 | { |
107 | SCM_ALLOW_INTS; | |
1edae076 | 108 | scm_misc_error (subr, err? err : "symbol has NULL address", SCM_EOL); |
419e9e11 | 109 | } |
1edae076 MV |
110 | return fptr; |
111 | } | |
112 | ||
80bc7890 MV |
113 | static void |
114 | sysdep_dynl_init () | |
1edae076 | 115 | { |
1edae076 | 116 | } |