Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_MODULE_H |
| 2 | #define _LINUX_MODULE_H |
| 3 | /* |
| 4 | * Dynamic loading of modules into the kernel. |
| 5 | * |
| 6 | * Rewritten by Richard Henderson <rth@tamu.edu> Dec 1996 |
| 7 | * Rewritten again by Rusty Russell, 2002 |
| 8 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/sched.h> |
| 10 | #include <linux/spinlock.h> |
| 11 | #include <linux/list.h> |
| 12 | #include <linux/stat.h> |
| 13 | #include <linux/compiler.h> |
| 14 | #include <linux/cache.h> |
| 15 | #include <linux/kmod.h> |
| 16 | #include <linux/elf.h> |
| 17 | #include <linux/stringify.h> |
| 18 | #include <linux/kobject.h> |
| 19 | #include <linux/moduleparam.h> |
| 20 | #include <asm/local.h> |
| 21 | |
| 22 | #include <asm/module.h> |
| 23 | |
| 24 | /* Not Yet Implemented */ |
| 25 | #define MODULE_SUPPORTED_DEVICE(name) |
| 26 | |
| 27 | /* v850 toolchain uses a `_' prefix for all user symbols */ |
| 28 | #ifndef MODULE_SYMBOL_PREFIX |
| 29 | #define MODULE_SYMBOL_PREFIX "" |
| 30 | #endif |
| 31 | |
| 32 | #define MODULE_NAME_LEN (64 - sizeof(unsigned long)) |
| 33 | |
| 34 | struct kernel_symbol |
| 35 | { |
| 36 | unsigned long value; |
| 37 | const char *name; |
| 38 | }; |
| 39 | |
| 40 | struct modversion_info |
| 41 | { |
| 42 | unsigned long crc; |
| 43 | char name[MODULE_NAME_LEN]; |
| 44 | }; |
| 45 | |
| 46 | struct module; |
| 47 | |
| 48 | struct module_attribute { |
| 49 | struct attribute attr; |
| 50 | ssize_t (*show)(struct module_attribute *, struct module *, char *); |
| 51 | ssize_t (*store)(struct module_attribute *, struct module *, |
| 52 | const char *, size_t count); |
Matt Domsch | c988d2b | 2005-06-23 22:05:15 -0700 | [diff] [blame] | 53 | void (*setup)(struct module *, const char *); |
| 54 | int (*test)(struct module *); |
| 55 | void (*free)(struct module *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | }; |
| 57 | |
| 58 | struct module_kobject |
| 59 | { |
| 60 | struct kobject kobj; |
| 61 | struct module *mod; |
| 62 | }; |
| 63 | |
| 64 | /* These are either module local, or the kernel's dummy ones. */ |
| 65 | extern int init_module(void); |
| 66 | extern void cleanup_module(void); |
| 67 | |
| 68 | /* Archs provide a method of finding the correct exception table. */ |
| 69 | struct exception_table_entry; |
| 70 | |
| 71 | const struct exception_table_entry * |
| 72 | search_extable(const struct exception_table_entry *first, |
| 73 | const struct exception_table_entry *last, |
| 74 | unsigned long value); |
| 75 | void sort_extable(struct exception_table_entry *start, |
| 76 | struct exception_table_entry *finish); |
| 77 | void sort_main_extable(void); |
| 78 | |
| 79 | extern struct subsystem module_subsys; |
| 80 | |
| 81 | #ifdef MODULE |
| 82 | #define MODULE_GENERIC_TABLE(gtype,name) \ |
| 83 | extern const struct gtype##_id __mod_##gtype##_table \ |
| 84 | __attribute__ ((unused, alias(__stringify(name)))) |
| 85 | |
| 86 | extern struct module __this_module; |
| 87 | #define THIS_MODULE (&__this_module) |
| 88 | #else /* !MODULE */ |
| 89 | #define MODULE_GENERIC_TABLE(gtype,name) |
| 90 | #define THIS_MODULE ((struct module *)0) |
| 91 | #endif |
| 92 | |
| 93 | /* Generic info of form tag = "info" */ |
| 94 | #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) |
| 95 | |
| 96 | /* For userspace: you can also call me... */ |
| 97 | #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias) |
| 98 | |
| 99 | /* |
| 100 | * The following license idents are currently accepted as indicating free |
| 101 | * software modules |
| 102 | * |
| 103 | * "GPL" [GNU Public License v2 or later] |
| 104 | * "GPL v2" [GNU Public License v2] |
| 105 | * "GPL and additional rights" [GNU Public License v2 rights and more] |
| 106 | * "Dual BSD/GPL" [GNU Public License v2 |
| 107 | * or BSD license choice] |
Xose Vazquez Perez | 8d27e90 | 2006-06-23 02:05:13 -0700 | [diff] [blame] | 108 | * "Dual MIT/GPL" [GNU Public License v2 |
| 109 | * or MIT license choice] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | * "Dual MPL/GPL" [GNU Public License v2 |
| 111 | * or Mozilla license choice] |
| 112 | * |
| 113 | * The following other idents are available |
| 114 | * |
| 115 | * "Proprietary" [Non free products] |
| 116 | * |
| 117 | * There are dual licensed components, but when running with Linux it is the |
| 118 | * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL |
| 119 | * is a GPL combined work. |
| 120 | * |
| 121 | * This exists for several reasons |
| 122 | * 1. So modinfo can show license info for users wanting to vet their setup |
| 123 | * is free |
| 124 | * 2. So the community can ignore bug reports including proprietary modules |
| 125 | * 3. So vendors can do likewise based on their own policies |
| 126 | */ |
| 127 | #define MODULE_LICENSE(_license) MODULE_INFO(license, _license) |
| 128 | |
| 129 | /* Author, ideally of form NAME <EMAIL>[, NAME <EMAIL>]*[ and NAME <EMAIL>] */ |
| 130 | #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) |
| 131 | |
| 132 | /* What your module does. */ |
| 133 | #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) |
| 134 | |
| 135 | /* One for each parameter, describing how to use it. Some files do |
| 136 | multiple of these per line, so can't just use MODULE_INFO. */ |
| 137 | #define MODULE_PARM_DESC(_parm, desc) \ |
| 138 | __MODULE_INFO(parm, _parm, #_parm ":" desc) |
| 139 | |
| 140 | #define MODULE_DEVICE_TABLE(type,name) \ |
| 141 | MODULE_GENERIC_TABLE(type##_device,name) |
| 142 | |
| 143 | /* Version of form [<epoch>:]<version>[-<extra-version>]. |
| 144 | Or for CVS/RCS ID version, everything but the number is stripped. |
| 145 | <epoch>: A (small) unsigned integer which allows you to start versions |
| 146 | anew. If not mentioned, it's zero. eg. "2:1.0" is after |
| 147 | "1:2.0". |
| 148 | <version>: The <version> may contain only alphanumerics and the |
| 149 | character `.'. Ordered by numeric sort for numeric parts, |
| 150 | ascii sort for ascii parts (as per RPM or DEB algorithm). |
| 151 | <extraversion>: Like <version>, but inserted for local |
| 152 | customizations, eg "rh3" or "rusty1". |
| 153 | |
| 154 | Using this automatically adds a checksum of the .c files and the |
| 155 | local headers in "srcversion". |
| 156 | */ |
| 157 | #define MODULE_VERSION(_version) MODULE_INFO(version, _version) |
| 158 | |
| 159 | /* Given an address, look for it in the exception tables */ |
| 160 | const struct exception_table_entry *search_exception_tables(unsigned long add); |
| 161 | |
| 162 | struct notifier_block; |
| 163 | |
| 164 | #ifdef CONFIG_MODULES |
| 165 | |
| 166 | /* Get/put a kernel symbol (calls must be symmetric) */ |
| 167 | void *__symbol_get(const char *symbol); |
| 168 | void *__symbol_get_gpl(const char *symbol); |
| 169 | #define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x))) |
| 170 | |
| 171 | #ifndef __GENKSYMS__ |
| 172 | #ifdef CONFIG_MODVERSIONS |
| 173 | /* Mark the CRC weak since genksyms apparently decides not to |
| 174 | * generate a checksums for some symbols */ |
| 175 | #define __CRC_SYMBOL(sym, sec) \ |
| 176 | extern void *__crc_##sym __attribute__((weak)); \ |
| 177 | static const unsigned long __kcrctab_##sym \ |
| 178 | __attribute_used__ \ |
| 179 | __attribute__((section("__kcrctab" sec), unused)) \ |
| 180 | = (unsigned long) &__crc_##sym; |
| 181 | #else |
| 182 | #define __CRC_SYMBOL(sym, sec) |
| 183 | #endif |
| 184 | |
| 185 | /* For every exported symbol, place a struct in the __ksymtab section */ |
| 186 | #define __EXPORT_SYMBOL(sym, sec) \ |
Patrick McHardy | a1a8fee | 2006-03-23 22:07:34 -0800 | [diff] [blame] | 187 | extern typeof(sym) sym; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | __CRC_SYMBOL(sym, sec) \ |
| 189 | static const char __kstrtab_##sym[] \ |
| 190 | __attribute__((section("__ksymtab_strings"))) \ |
| 191 | = MODULE_SYMBOL_PREFIX #sym; \ |
| 192 | static const struct kernel_symbol __ksymtab_##sym \ |
| 193 | __attribute_used__ \ |
| 194 | __attribute__((section("__ksymtab" sec), unused)) \ |
| 195 | = { (unsigned long)&sym, __kstrtab_##sym } |
| 196 | |
| 197 | #define EXPORT_SYMBOL(sym) \ |
| 198 | __EXPORT_SYMBOL(sym, "") |
| 199 | |
| 200 | #define EXPORT_SYMBOL_GPL(sym) \ |
| 201 | __EXPORT_SYMBOL(sym, "_gpl") |
| 202 | |
Greg Kroah-Hartman | 9f28bb7 | 2006-03-20 13:17:13 -0800 | [diff] [blame] | 203 | #define EXPORT_SYMBOL_GPL_FUTURE(sym) \ |
| 204 | __EXPORT_SYMBOL(sym, "_gpl_future") |
| 205 | |
Arjan van de Ven | f71d20e | 2006-06-28 04:26:45 -0700 | [diff] [blame] | 206 | |
| 207 | #ifdef CONFIG_UNUSED_SYMBOLS |
| 208 | #define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused") |
| 209 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl") |
| 210 | #else |
| 211 | #define EXPORT_UNUSED_SYMBOL(sym) |
| 212 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) |
| 213 | #endif |
| 214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | #endif |
| 216 | |
| 217 | struct module_ref |
| 218 | { |
| 219 | local_t count; |
| 220 | } ____cacheline_aligned; |
| 221 | |
| 222 | enum module_state |
| 223 | { |
| 224 | MODULE_STATE_LIVE, |
| 225 | MODULE_STATE_COMING, |
| 226 | MODULE_STATE_GOING, |
| 227 | }; |
| 228 | |
| 229 | /* Similar stuff for section attributes. */ |
| 230 | #define MODULE_SECT_NAME_LEN 32 |
| 231 | struct module_sect_attr |
| 232 | { |
| 233 | struct module_attribute mattr; |
| 234 | char name[MODULE_SECT_NAME_LEN]; |
| 235 | unsigned long address; |
| 236 | }; |
| 237 | |
| 238 | struct module_sect_attrs |
| 239 | { |
| 240 | struct attribute_group grp; |
| 241 | struct module_sect_attr attrs[0]; |
| 242 | }; |
| 243 | |
| 244 | struct module_param_attrs; |
| 245 | |
| 246 | struct module |
| 247 | { |
| 248 | enum module_state state; |
| 249 | |
| 250 | /* Member of list of modules */ |
| 251 | struct list_head list; |
| 252 | |
| 253 | /* Unique handle for this module */ |
| 254 | char name[MODULE_NAME_LEN]; |
| 255 | |
| 256 | /* Sysfs stuff. */ |
| 257 | struct module_kobject mkobj; |
| 258 | struct module_param_attrs *param_attrs; |
Greg Kroah-Hartman | 03e88ae1 | 2006-02-16 13:50:23 -0800 | [diff] [blame] | 259 | struct module_attribute *modinfo_attrs; |
Matt Domsch | c988d2b | 2005-06-23 22:05:15 -0700 | [diff] [blame] | 260 | const char *version; |
| 261 | const char *srcversion; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
| 263 | /* Exported symbols */ |
| 264 | const struct kernel_symbol *syms; |
| 265 | unsigned int num_syms; |
| 266 | const unsigned long *crcs; |
| 267 | |
| 268 | /* GPL-only exported symbols. */ |
| 269 | const struct kernel_symbol *gpl_syms; |
| 270 | unsigned int num_gpl_syms; |
| 271 | const unsigned long *gpl_crcs; |
| 272 | |
Arjan van de Ven | f71d20e | 2006-06-28 04:26:45 -0700 | [diff] [blame] | 273 | /* unused exported symbols. */ |
| 274 | const struct kernel_symbol *unused_syms; |
| 275 | unsigned int num_unused_syms; |
| 276 | const unsigned long *unused_crcs; |
| 277 | /* GPL-only, unused exported symbols. */ |
| 278 | const struct kernel_symbol *unused_gpl_syms; |
| 279 | unsigned int num_unused_gpl_syms; |
| 280 | const unsigned long *unused_gpl_crcs; |
| 281 | |
Greg Kroah-Hartman | 9f28bb7 | 2006-03-20 13:17:13 -0800 | [diff] [blame] | 282 | /* symbols that will be GPL-only in the near future. */ |
| 283 | const struct kernel_symbol *gpl_future_syms; |
| 284 | unsigned int num_gpl_future_syms; |
| 285 | const unsigned long *gpl_future_crcs; |
| 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | /* Exception table */ |
| 288 | unsigned int num_exentries; |
| 289 | const struct exception_table_entry *extable; |
| 290 | |
| 291 | /* Startup function. */ |
| 292 | int (*init)(void); |
| 293 | |
| 294 | /* If this is non-NULL, vfree after init() returns */ |
| 295 | void *module_init; |
| 296 | |
| 297 | /* Here is the actual code + data, vfree'd on unload. */ |
| 298 | void *module_core; |
| 299 | |
| 300 | /* Here are the sizes of the init and core sections */ |
| 301 | unsigned long init_size, core_size; |
| 302 | |
| 303 | /* The size of the executable code in each section. */ |
| 304 | unsigned long init_text_size, core_text_size; |
| 305 | |
Jan Beulich | 4552d5d | 2006-06-26 13:57:28 +0200 | [diff] [blame] | 306 | /* The handle returned from unwind_add_table. */ |
| 307 | void *unwind_info; |
| 308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | /* Arch-specific module values */ |
| 310 | struct mod_arch_specific arch; |
| 311 | |
| 312 | /* Am I unsafe to unload? */ |
| 313 | int unsafe; |
| 314 | |
| 315 | /* Am I GPL-compatible */ |
| 316 | int license_gplok; |
| 317 | |
| 318 | #ifdef CONFIG_MODULE_UNLOAD |
| 319 | /* Reference counts */ |
| 320 | struct module_ref ref[NR_CPUS]; |
| 321 | |
| 322 | /* What modules depend on me? */ |
| 323 | struct list_head modules_which_use_me; |
| 324 | |
| 325 | /* Who is waiting for us to be unloaded */ |
| 326 | struct task_struct *waiter; |
| 327 | |
| 328 | /* Destruction function. */ |
| 329 | void (*exit)(void); |
| 330 | #endif |
| 331 | |
| 332 | #ifdef CONFIG_KALLSYMS |
| 333 | /* We keep the symbol and string tables for kallsyms. */ |
| 334 | Elf_Sym *symtab; |
| 335 | unsigned long num_symtab; |
| 336 | char *strtab; |
| 337 | |
| 338 | /* Section attributes */ |
| 339 | struct module_sect_attrs *sect_attrs; |
| 340 | #endif |
| 341 | |
| 342 | /* Per-cpu data. */ |
| 343 | void *percpu; |
| 344 | |
| 345 | /* The command line arguments (may be mangled). People like |
| 346 | keeping pointers to this stuff */ |
| 347 | char *args; |
| 348 | }; |
| 349 | |
| 350 | /* FIXME: It'd be nice to isolate modules during init, too, so they |
| 351 | aren't used before they (may) fail. But presently too much code |
| 352 | (IDE & SCSI) require entry into the module during init.*/ |
| 353 | static inline int module_is_live(struct module *mod) |
| 354 | { |
| 355 | return mod->state != MODULE_STATE_GOING; |
| 356 | } |
| 357 | |
| 358 | /* Is this address in a module? (second is with no locks, for oops) */ |
| 359 | struct module *module_text_address(unsigned long addr); |
| 360 | struct module *__module_text_address(unsigned long addr); |
Ingo Molnar | 4d435f9 | 2006-07-03 00:24:24 -0700 | [diff] [blame] | 361 | int is_module_address(unsigned long addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
| 363 | /* Returns module and fills in value, defined and namebuf, or NULL if |
| 364 | symnum out of range. */ |
| 365 | struct module *module_get_kallsym(unsigned int symnum, |
| 366 | unsigned long *value, |
| 367 | char *type, |
| 368 | char namebuf[128]); |
| 369 | |
| 370 | /* Look for this name: can be of form module:name. */ |
| 371 | unsigned long module_kallsyms_lookup_name(const char *name); |
| 372 | |
| 373 | int is_exported(const char *name, const struct module *mod); |
| 374 | |
| 375 | extern void __module_put_and_exit(struct module *mod, long code) |
| 376 | __attribute__((noreturn)); |
| 377 | #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code); |
| 378 | |
| 379 | #ifdef CONFIG_MODULE_UNLOAD |
| 380 | unsigned int module_refcount(struct module *mod); |
| 381 | void __symbol_put(const char *symbol); |
| 382 | #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x) |
| 383 | void symbol_put_addr(void *addr); |
| 384 | |
| 385 | /* Sometimes we know we already have a refcount, and it's easier not |
| 386 | to handle the error case (which only happens with rmmod --wait). */ |
| 387 | static inline void __module_get(struct module *module) |
| 388 | { |
| 389 | if (module) { |
| 390 | BUG_ON(module_refcount(module) == 0); |
| 391 | local_inc(&module->ref[get_cpu()].count); |
| 392 | put_cpu(); |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | static inline int try_module_get(struct module *module) |
| 397 | { |
| 398 | int ret = 1; |
| 399 | |
| 400 | if (module) { |
| 401 | unsigned int cpu = get_cpu(); |
| 402 | if (likely(module_is_live(module))) |
| 403 | local_inc(&module->ref[cpu].count); |
| 404 | else |
| 405 | ret = 0; |
| 406 | put_cpu(); |
| 407 | } |
| 408 | return ret; |
| 409 | } |
| 410 | |
| 411 | static inline void module_put(struct module *module) |
| 412 | { |
| 413 | if (module) { |
| 414 | unsigned int cpu = get_cpu(); |
| 415 | local_dec(&module->ref[cpu].count); |
| 416 | /* Maybe they're waiting for us to drop reference? */ |
| 417 | if (unlikely(!module_is_live(module))) |
| 418 | wake_up_process(module->waiter); |
| 419 | put_cpu(); |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | #else /*!CONFIG_MODULE_UNLOAD*/ |
| 424 | static inline int try_module_get(struct module *module) |
| 425 | { |
| 426 | return !module || module_is_live(module); |
| 427 | } |
| 428 | static inline void module_put(struct module *module) |
| 429 | { |
| 430 | } |
| 431 | static inline void __module_get(struct module *module) |
| 432 | { |
| 433 | } |
| 434 | #define symbol_put(x) do { } while(0) |
| 435 | #define symbol_put_addr(p) do { } while(0) |
| 436 | |
| 437 | #endif /* CONFIG_MODULE_UNLOAD */ |
| 438 | |
| 439 | /* This is a #define so the string doesn't get put in every .o file */ |
| 440 | #define module_name(mod) \ |
| 441 | ({ \ |
| 442 | struct module *__mod = (mod); \ |
| 443 | __mod ? __mod->name : "kernel"; \ |
| 444 | }) |
| 445 | |
| 446 | #define __unsafe(mod) \ |
| 447 | do { \ |
| 448 | if (mod && !(mod)->unsafe) { \ |
| 449 | printk(KERN_WARNING \ |
| 450 | "Module %s cannot be unloaded due to unsafe usage in" \ |
| 451 | " %s:%u\n", (mod)->name, __FILE__, __LINE__); \ |
| 452 | (mod)->unsafe = 1; \ |
| 453 | } \ |
| 454 | } while(0) |
| 455 | |
| 456 | /* For kallsyms to ask for address resolution. NULL means not found. */ |
| 457 | const char *module_address_lookup(unsigned long addr, |
| 458 | unsigned long *symbolsize, |
| 459 | unsigned long *offset, |
| 460 | char **modname); |
| 461 | |
| 462 | /* For extable.c to search modules' exception tables. */ |
| 463 | const struct exception_table_entry *search_module_extables(unsigned long addr); |
| 464 | |
| 465 | int register_module_notifier(struct notifier_block * nb); |
| 466 | int unregister_module_notifier(struct notifier_block * nb); |
| 467 | |
| 468 | extern void print_modules(void); |
| 469 | |
| 470 | struct device_driver; |
| 471 | void module_add_driver(struct module *, struct device_driver *); |
| 472 | void module_remove_driver(struct device_driver *); |
| 473 | |
| 474 | #else /* !CONFIG_MODULES... */ |
| 475 | #define EXPORT_SYMBOL(sym) |
| 476 | #define EXPORT_SYMBOL_GPL(sym) |
Greg Kroah-Hartman | 9f28bb7 | 2006-03-20 13:17:13 -0800 | [diff] [blame] | 477 | #define EXPORT_SYMBOL_GPL_FUTURE(sym) |
Arjan van de Ven | f71d20e | 2006-06-28 04:26:45 -0700 | [diff] [blame] | 478 | #define EXPORT_UNUSED_SYMBOL(sym) |
| 479 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
| 481 | /* Given an address, look for it in the exception tables. */ |
| 482 | static inline const struct exception_table_entry * |
| 483 | search_module_extables(unsigned long addr) |
| 484 | { |
| 485 | return NULL; |
| 486 | } |
| 487 | |
| 488 | /* Is this address in a module? */ |
| 489 | static inline struct module *module_text_address(unsigned long addr) |
| 490 | { |
| 491 | return NULL; |
| 492 | } |
| 493 | |
| 494 | /* Is this address in a module? (don't take a lock, we're oopsing) */ |
| 495 | static inline struct module *__module_text_address(unsigned long addr) |
| 496 | { |
| 497 | return NULL; |
| 498 | } |
| 499 | |
Ingo Molnar | 4d435f9 | 2006-07-03 00:24:24 -0700 | [diff] [blame] | 500 | static inline int is_module_address(unsigned long addr) |
| 501 | { |
| 502 | return 0; |
| 503 | } |
| 504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | /* Get/put a kernel symbol (calls should be symmetric) */ |
| 506 | #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); }) |
| 507 | #define symbol_put(x) do { } while(0) |
| 508 | #define symbol_put_addr(x) do { } while(0) |
| 509 | |
| 510 | static inline void __module_get(struct module *module) |
| 511 | { |
| 512 | } |
| 513 | |
| 514 | static inline int try_module_get(struct module *module) |
| 515 | { |
| 516 | return 1; |
| 517 | } |
| 518 | |
| 519 | static inline void module_put(struct module *module) |
| 520 | { |
| 521 | } |
| 522 | |
| 523 | #define module_name(mod) "kernel" |
| 524 | |
| 525 | #define __unsafe(mod) |
| 526 | |
| 527 | /* For kallsyms to ask for address resolution. NULL means not found. */ |
| 528 | static inline const char *module_address_lookup(unsigned long addr, |
| 529 | unsigned long *symbolsize, |
| 530 | unsigned long *offset, |
| 531 | char **modname) |
| 532 | { |
| 533 | return NULL; |
| 534 | } |
| 535 | |
| 536 | static inline struct module *module_get_kallsym(unsigned int symnum, |
| 537 | unsigned long *value, |
| 538 | char *type, |
| 539 | char namebuf[128]) |
| 540 | { |
| 541 | return NULL; |
| 542 | } |
| 543 | |
| 544 | static inline unsigned long module_kallsyms_lookup_name(const char *name) |
| 545 | { |
| 546 | return 0; |
| 547 | } |
| 548 | |
| 549 | static inline int is_exported(const char *name, const struct module *mod) |
| 550 | { |
| 551 | return 0; |
| 552 | } |
| 553 | |
| 554 | static inline int register_module_notifier(struct notifier_block * nb) |
| 555 | { |
| 556 | /* no events will happen anyway, so this can always succeed */ |
| 557 | return 0; |
| 558 | } |
| 559 | |
| 560 | static inline int unregister_module_notifier(struct notifier_block * nb) |
| 561 | { |
| 562 | return 0; |
| 563 | } |
| 564 | |
| 565 | #define module_put_and_exit(code) do_exit(code) |
| 566 | |
| 567 | static inline void print_modules(void) |
| 568 | { |
| 569 | } |
| 570 | |
| 571 | struct device_driver; |
| 572 | struct module; |
| 573 | |
| 574 | static inline void module_add_driver(struct module *module, struct device_driver *driver) |
| 575 | { |
| 576 | } |
| 577 | |
| 578 | static inline void module_remove_driver(struct device_driver *driver) |
| 579 | { |
| 580 | } |
| 581 | |
| 582 | #endif /* CONFIG_MODULES */ |
| 583 | |
| 584 | #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) |
| 585 | |
| 586 | /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ |
| 587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | #define __MODULE_STRING(x) __stringify(x) |
| 589 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | #endif /* _LINUX_MODULE_H */ |