1 /*
2 * Copyright 1995-1998 by Metro Link, Inc.
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation, and that the name of Metro Link, Inc. not be used in
9 * advertising or publicity pertaining to distribution of the software without
10 * specific, written prior permission. Metro Link, Inc. makes no
11 * representations about the suitability of this software for any purpose.
12 * It is provided "as is" without express or implied warranty.
13 *
14 * METRO LINK, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL METRO LINK, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
20 * PERFORMANCE OF THIS SOFTWARE.
21 */
22 /*
23 * Copyright (c) 1997-2003 by The XFree86 Project, Inc.
24 *
25 * Permission is hereby granted, free of charge, to any person obtaining a
26 * copy of this software and associated documentation files (the "Software"),
27 * to deal in the Software without restriction, including without limitation
28 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
29 * and/or sell copies of the Software, and to permit persons to whom the
30 * Software is furnished to do so, subject to the following conditions:
31 *
32 * The above copyright notice and this permission notice shall be included in
33 * all copies or substantial portions of the Software.
34 *
35 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
36 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
37 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
38 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
39 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
40 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
41 * OTHER DEALINGS IN THE SOFTWARE.
42 *
43 * Except as contained in this notice, the name of the copyright holder(s)
44 * and author(s) shall not be used in advertising or otherwise to promote
45 * the sale, use or other dealings in this Software without prior written
46 * authorization from the copyright holder(s) and author(s).
47 */
48
49 #ifdef HAVE_XORG_CONFIG_H
50 #include <xorg-config.h>
51 #endif
52
53 #include <string.h>
54 #include "os.h"
55 #include "loader.h"
56 #include "loaderProcs.h"
57
58 #ifdef HAVE_DLFCN_H
59
60 #include <dlfcn.h>
61 #include <X11/Xos.h>
62
63 #else
64 #error i have no dynamic linker and i must scream
65 #endif
66
67 #ifndef XORG_NO_SDKSYMS
68 extern void *xorg_symbols[];
69 #endif
70
71 void
LoaderInit(void)72 LoaderInit(void)
73 {
74 #ifndef XORG_NO_SDKSYMS
75 LogMessageVerb(X_INFO, 2, "Loader magic: %p\n", (void *) xorg_symbols);
76 #endif
77 LogMessageVerb(X_INFO, 2, "Module ABI versions:\n");
78 LogWrite(2, "\t%s: %d.%d\n", ABI_CLASS_ANSIC,
79 GET_ABI_MAJOR(LoaderVersionInfo.ansicVersion),
80 GET_ABI_MINOR(LoaderVersionInfo.ansicVersion));
81 LogWrite(2, "\t%s: %d.%d\n", ABI_CLASS_VIDEODRV,
82 GET_ABI_MAJOR(LoaderVersionInfo.videodrvVersion),
83 GET_ABI_MINOR(LoaderVersionInfo.videodrvVersion));
84 LogWrite(2, "\t%s : %d.%d\n", ABI_CLASS_XINPUT,
85 GET_ABI_MAJOR(LoaderVersionInfo.xinputVersion),
86 GET_ABI_MINOR(LoaderVersionInfo.xinputVersion));
87 LogWrite(2, "\t%s : %d.%d\n", ABI_CLASS_EXTENSION,
88 GET_ABI_MAJOR(LoaderVersionInfo.extensionVersion),
89 GET_ABI_MINOR(LoaderVersionInfo.extensionVersion));
90
91 }
92
93 /* Public Interface to the loader. */
94
95 void *
LoaderOpen(const char * module,int * errmaj)96 LoaderOpen(const char *module, int *errmaj)
97 {
98 void *ret;
99
100 #if defined(DEBUG)
101 ErrorF("LoaderOpen(%s)\n", module);
102 #endif
103
104 LogMessage(X_INFO, "Loading %s\n", module);
105
106 if (!(ret = dlopen(module, RTLD_LAZY | RTLD_GLOBAL))) {
107 LogMessage(X_ERROR, "Failed to load %s: %s\n", module, dlerror());
108 if (errmaj)
109 *errmaj = LDR_NOLOAD;
110 return NULL;
111 }
112
113 return ret;
114 }
115
116 void *
LoaderSymbol(const char * name)117 LoaderSymbol(const char *name)
118 {
119 static void *global_scope = NULL;
120 void *p;
121
122 p = dlsym(RTLD_DEFAULT, name);
123 if (p != NULL)
124 return p;
125
126 if (!global_scope)
127 global_scope = dlopen(NULL, RTLD_LAZY | RTLD_GLOBAL);
128
129 if (global_scope)
130 return dlsym(global_scope, name);
131
132 return NULL;
133 }
134
135 void *
LoaderSymbolFromModule(void * handle,const char * name)136 LoaderSymbolFromModule(void *handle, const char *name)
137 {
138 return dlsym(handle, name);
139 }
140
141 void
LoaderUnload(const char * name,void * handle)142 LoaderUnload(const char *name, void *handle)
143 {
144 LogMessageVerbSigSafe(X_INFO, 1, "Unloading %s\n", name);
145 if (handle)
146 dlclose(handle);
147 }
148
149 unsigned long LoaderOptions = 0;
150
151 void
LoaderSetOptions(unsigned long opts)152 LoaderSetOptions(unsigned long opts)
153 {
154 LoaderOptions |= opts;
155 }
156
157 Bool
LoaderShouldIgnoreABI(void)158 LoaderShouldIgnoreABI(void)
159 {
160 return (LoaderOptions & LDR_OPT_ABI_MISMATCH_NONFATAL) != 0;
161 }
162
163 int
LoaderGetABIVersion(const char * abiclass)164 LoaderGetABIVersion(const char *abiclass)
165 {
166 struct {
167 const char *name;
168 int version;
169 } classes[] = {
170 {ABI_CLASS_ANSIC, LoaderVersionInfo.ansicVersion},
171 {ABI_CLASS_VIDEODRV, LoaderVersionInfo.videodrvVersion},
172 {ABI_CLASS_XINPUT, LoaderVersionInfo.xinputVersion},
173 {ABI_CLASS_EXTENSION, LoaderVersionInfo.extensionVersion},
174 {NULL, 0}
175 };
176 int i;
177
178 for (i = 0; classes[i].name; i++) {
179 if (!strcmp(classes[i].name, abiclass)) {
180 return classes[i].version;
181 }
182 }
183
184 return 0;
185 }
186