loader.c (5721B)
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 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 * 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 * 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 * 136 LoaderSymbolFromModule(void *handle, const char *name) 137 { 138 ModuleDescPtr mod = handle; 139 return dlsym(mod->handle, name); 140 } 141 142 void 143 LoaderUnload(const char *name, void *handle) 144 { 145 LogMessageVerbSigSafe(X_INFO, 1, "Unloading %s\n", name); 146 if (handle) 147 dlclose(handle); 148 } 149 150 unsigned long LoaderOptions = 0; 151 152 void 153 LoaderSetOptions(unsigned long opts) 154 { 155 LoaderOptions |= opts; 156 } 157 158 Bool 159 LoaderShouldIgnoreABI(void) 160 { 161 return (LoaderOptions & LDR_OPT_ABI_MISMATCH_NONFATAL) != 0; 162 } 163 164 int 165 LoaderGetABIVersion(const char *abiclass) 166 { 167 struct { 168 const char *name; 169 int version; 170 } classes[] = { 171 {ABI_CLASS_ANSIC, LoaderVersionInfo.ansicVersion}, 172 {ABI_CLASS_VIDEODRV, LoaderVersionInfo.videodrvVersion}, 173 {ABI_CLASS_XINPUT, LoaderVersionInfo.xinputVersion}, 174 {ABI_CLASS_EXTENSION, LoaderVersionInfo.extensionVersion}, 175 {NULL, 0} 176 }; 177 int i; 178 179 for (i = 0; classes[i].name; i++) { 180 if (!strcmp(classes[i].name, abiclass)) { 181 return classes[i].version; 182 } 183 } 184 185 return 0; 186 }