| 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 <errno.h> |
| 54 | #include <stdio.h> |
| 55 | #include <stdlib.h> |
| 56 | #include <sys/types.h> |
| 57 | #include <unistd.h> |
| 58 | #include <sys/stat.h> |
| 59 | #include <fcntl.h> |
| 60 | #include <string.h> |
| 61 | #include <stdarg.h> |
| 62 | |
| 63 | #include "os.h" |
| 64 | #include "loader.h" |
| 65 | #include "loaderProcs.h" |
| 66 | #include "xf86.h" |
| 67 | #include "xf86Priv.h" |
| 68 | #include "compiler.h" |
| 69 | |
| 70 | #ifdef HAVE_DLFCN_H |
| 71 | |
| 72 | #include <dlfcn.h> |
| 73 | #include <X11/Xos.h> |
| 74 | |
| 75 | #if defined(DL_LAZY) |
| 76 | #define DLOPEN_LAZY DL_LAZY |
| 77 | #elif defined(RTLD_LAZY) |
| 78 | #define DLOPEN_LAZY RTLD_LAZY |
| 79 | #elif defined(__FreeBSD__) |
| 80 | #define DLOPEN_LAZY 1 |
| 81 | #else |
| 82 | #define DLOPEN_LAZY 0 |
| 83 | #endif |
| 84 | |
| 85 | #if defined(LD_GLOBAL) |
| 86 | #define DLOPEN_GLOBAL LD_GLOBAL |
| 87 | #elif defined(RTLD_GLOBAL) |
| 88 | #define DLOPEN_GLOBAL RTLD_GLOBAL |
| 89 | #else |
| 90 | #define DLOPEN_GLOBAL 0 |
| 91 | #endif |
| 92 | |
| 93 | #else |
| 94 | #error i have no dynamic linker and i must scream |
| 95 | #endif |
| 96 | |
| 97 | extern void *xorg_symbols[]; |
| 98 | |
| 99 | void |
| 100 | LoaderInit(void) |
| 101 | { |
| 102 | xf86MsgVerb(X_INFO, 2, "Loader magic: %p\n", (void *) xorg_symbols); |
| 103 | xf86MsgVerb(X_INFO, 2, "Module ABI versions:\n"); |
| 104 | xf86ErrorFVerb(2, "\t%s: %d.%d\n", ABI_CLASS_ANSIC, |
| 105 | GET_ABI_MAJOR(LoaderVersionInfo.ansicVersion), |
| 106 | GET_ABI_MINOR(LoaderVersionInfo.ansicVersion)); |
| 107 | xf86ErrorFVerb(2, "\t%s: %d.%d\n", ABI_CLASS_VIDEODRV, |
| 108 | GET_ABI_MAJOR(LoaderVersionInfo.videodrvVersion), |
| 109 | GET_ABI_MINOR(LoaderVersionInfo.videodrvVersion)); |
| 110 | xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_XINPUT, |
| 111 | GET_ABI_MAJOR(LoaderVersionInfo.xinputVersion), |
| 112 | GET_ABI_MINOR(LoaderVersionInfo.xinputVersion)); |
| 113 | xf86ErrorFVerb(2, "\t%s : %d.%d\n", ABI_CLASS_EXTENSION, |
| 114 | GET_ABI_MAJOR(LoaderVersionInfo.extensionVersion), |
| 115 | GET_ABI_MINOR(LoaderVersionInfo.extensionVersion)); |
| 116 | |
| 117 | } |
| 118 | |
| 119 | /* Public Interface to the loader. */ |
| 120 | |
| 121 | void * |
| 122 | LoaderOpen(const char *module, int *errmaj, int *errmin) |
| 123 | { |
| 124 | void *ret; |
| 125 | |
| 126 | #if defined(DEBUG) |
| 127 | ErrorF("LoaderOpen(%s)\n", module); |
| 128 | #endif |
| 129 | |
| 130 | xf86Msg(X_INFO, "Loading %s\n", module); |
| 131 | |
| 132 | if (!(ret = dlopen(module, DLOPEN_LAZY | DLOPEN_GLOBAL))) { |
| 133 | xf86Msg(X_ERROR, "Failed to load %s: %s\n", module, dlerror()); |
| 134 | if (errmaj) |
| 135 | *errmaj = LDR_NOLOAD; |
| 136 | if (errmin) |
| 137 | *errmin = LDR_NOLOAD; |
| 138 | return NULL; |
| 139 | } |
| 140 | |
| 141 | return ret; |
| 142 | } |
| 143 | |
| 144 | void * |
| 145 | LoaderSymbol(const char *name) |
| 146 | { |
| 147 | static void *global_scope = NULL; |
| 148 | void *p; |
| 149 | |
| 150 | p = dlsym(RTLD_DEFAULT, name); |
| 151 | if (p != NULL) |
| 152 | return p; |
| 153 | |
| 154 | if (!global_scope) |
| 155 | global_scope = dlopen(NULL, DLOPEN_LAZY | DLOPEN_GLOBAL); |
| 156 | |
| 157 | if (global_scope) |
| 158 | return dlsym(global_scope, name); |
| 159 | |
| 160 | return NULL; |
| 161 | } |
| 162 | |
| 163 | void * |
| 164 | LoaderSymbolFromModule(void *handle, const char *name) |
| 165 | { |
| 166 | return dlsym(handle, name); |
| 167 | } |
| 168 | |
| 169 | void |
| 170 | LoaderUnload(const char *name, void *handle) |
| 171 | { |
| 172 | LogMessageVerbSigSafe(X_INFO, 1, "Unloading %s\n", name); |
| 173 | if (handle) |
| 174 | dlclose(handle); |
| 175 | } |
| 176 | |
| 177 | unsigned long LoaderOptions = 0; |
| 178 | |
| 179 | void |
| 180 | LoaderSetOptions(unsigned long opts) |
| 181 | { |
| 182 | LoaderOptions |= opts; |
| 183 | } |
| 184 | |
| 185 | Bool |
| 186 | LoaderShouldIgnoreABI(void) |
| 187 | { |
| 188 | return (LoaderOptions & LDR_OPT_ABI_MISMATCH_NONFATAL) != 0; |
| 189 | } |
| 190 | |
| 191 | int |
| 192 | LoaderGetABIVersion(const char *abiclass) |
| 193 | { |
| 194 | struct { |
| 195 | const char *name; |
| 196 | int version; |
| 197 | } classes[] = { |
| 198 | {ABI_CLASS_ANSIC, LoaderVersionInfo.ansicVersion}, |
| 199 | {ABI_CLASS_VIDEODRV, LoaderVersionInfo.videodrvVersion}, |
| 200 | {ABI_CLASS_XINPUT, LoaderVersionInfo.xinputVersion}, |
| 201 | {ABI_CLASS_EXTENSION, LoaderVersionInfo.extensionVersion}, |
| 202 | {ABI_CLASS_FONT, LoaderVersionInfo.fontVersion}, |
| 203 | {NULL, 0} |
| 204 | }; |
| 205 | int i; |
| 206 | |
| 207 | for (i = 0; classes[i].name; i++) { |
| 208 | if (!strcmp(classes[i].name, abiclass)) { |
| 209 | return classes[i].version; |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | return 0; |
| 214 | } |