Commit | Line | Data |
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1da177e4 LT |
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 | */ | |
1da177e4 LT |
9 | #include <linux/list.h> |
10 | #include <linux/stat.h> | |
11 | #include <linux/compiler.h> | |
12 | #include <linux/cache.h> | |
13 | #include <linux/kmod.h> | |
14 | #include <linux/elf.h> | |
15 | #include <linux/stringify.h> | |
16 | #include <linux/kobject.h> | |
17 | #include <linux/moduleparam.h> | |
8256e47c | 18 | #include <linux/marker.h> |
97e1c18e | 19 | #include <linux/tracepoint.h> |
1da177e4 LT |
20 | #include <asm/local.h> |
21 | ||
22 | #include <asm/module.h> | |
23 | ||
24 | /* Not Yet Implemented */ | |
25 | #define MODULE_SUPPORTED_DEVICE(name) | |
26 | ||
f606ddf4 | 27 | /* some toolchains uses a `_' prefix for all user symbols */ |
1da177e4 LT |
28 | #ifndef MODULE_SYMBOL_PREFIX |
29 | #define MODULE_SYMBOL_PREFIX "" | |
30 | #endif | |
31 | ||
730b69d2 | 32 | #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN |
1da177e4 LT |
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); | |
c988d2b2 MD |
53 | void (*setup)(struct module *, const char *); |
54 | int (*test)(struct module *); | |
55 | void (*free)(struct module *); | |
1da177e4 LT |
56 | }; |
57 | ||
58 | struct module_kobject | |
59 | { | |
60 | struct kobject kobj; | |
61 | struct module *mod; | |
f30c53a8 | 62 | struct kobject *drivers_dir; |
9b473de8 | 63 | struct module_param_attrs *mp; |
1da177e4 LT |
64 | }; |
65 | ||
66 | /* These are either module local, or the kernel's dummy ones. */ | |
67 | extern int init_module(void); | |
68 | extern void cleanup_module(void); | |
69 | ||
70 | /* Archs provide a method of finding the correct exception table. */ | |
71 | struct exception_table_entry; | |
72 | ||
73 | const struct exception_table_entry * | |
74 | search_extable(const struct exception_table_entry *first, | |
75 | const struct exception_table_entry *last, | |
76 | unsigned long value); | |
77 | void sort_extable(struct exception_table_entry *start, | |
78 | struct exception_table_entry *finish); | |
79 | void sort_main_extable(void); | |
ad6561df | 80 | void trim_init_extable(struct module *m); |
1da177e4 | 81 | |
1da177e4 LT |
82 | #ifdef MODULE |
83 | #define MODULE_GENERIC_TABLE(gtype,name) \ | |
84 | extern const struct gtype##_id __mod_##gtype##_table \ | |
85 | __attribute__ ((unused, alias(__stringify(name)))) | |
86 | ||
87 | extern struct module __this_module; | |
88 | #define THIS_MODULE (&__this_module) | |
89 | #else /* !MODULE */ | |
90 | #define MODULE_GENERIC_TABLE(gtype,name) | |
91 | #define THIS_MODULE ((struct module *)0) | |
92 | #endif | |
93 | ||
94 | /* Generic info of form tag = "info" */ | |
95 | #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) | |
96 | ||
97 | /* For userspace: you can also call me... */ | |
98 | #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias) | |
99 | ||
100 | /* | |
101 | * The following license idents are currently accepted as indicating free | |
102 | * software modules | |
103 | * | |
104 | * "GPL" [GNU Public License v2 or later] | |
105 | * "GPL v2" [GNU Public License v2] | |
106 | * "GPL and additional rights" [GNU Public License v2 rights and more] | |
107 | * "Dual BSD/GPL" [GNU Public License v2 | |
108 | * or BSD license choice] | |
8d27e908 XVP |
109 | * "Dual MIT/GPL" [GNU Public License v2 |
110 | * or MIT license choice] | |
1da177e4 LT |
111 | * "Dual MPL/GPL" [GNU Public License v2 |
112 | * or Mozilla license choice] | |
113 | * | |
114 | * The following other idents are available | |
115 | * | |
116 | * "Proprietary" [Non free products] | |
117 | * | |
118 | * There are dual licensed components, but when running with Linux it is the | |
119 | * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL | |
120 | * is a GPL combined work. | |
121 | * | |
122 | * This exists for several reasons | |
123 | * 1. So modinfo can show license info for users wanting to vet their setup | |
124 | * is free | |
125 | * 2. So the community can ignore bug reports including proprietary modules | |
126 | * 3. So vendors can do likewise based on their own policies | |
127 | */ | |
128 | #define MODULE_LICENSE(_license) MODULE_INFO(license, _license) | |
129 | ||
108f39a1 | 130 | /* Author, ideally of form NAME[, NAME]*[ and NAME] */ |
1da177e4 LT |
131 | #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) |
132 | ||
133 | /* What your module does. */ | |
134 | #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) | |
135 | ||
136 | /* One for each parameter, describing how to use it. Some files do | |
137 | multiple of these per line, so can't just use MODULE_INFO. */ | |
138 | #define MODULE_PARM_DESC(_parm, desc) \ | |
139 | __MODULE_INFO(parm, _parm, #_parm ":" desc) | |
140 | ||
141 | #define MODULE_DEVICE_TABLE(type,name) \ | |
142 | MODULE_GENERIC_TABLE(type##_device,name) | |
143 | ||
144 | /* Version of form [<epoch>:]<version>[-<extra-version>]. | |
145 | Or for CVS/RCS ID version, everything but the number is stripped. | |
146 | <epoch>: A (small) unsigned integer which allows you to start versions | |
147 | anew. If not mentioned, it's zero. eg. "2:1.0" is after | |
148 | "1:2.0". | |
149 | <version>: The <version> may contain only alphanumerics and the | |
150 | character `.'. Ordered by numeric sort for numeric parts, | |
151 | ascii sort for ascii parts (as per RPM or DEB algorithm). | |
152 | <extraversion>: Like <version>, but inserted for local | |
153 | customizations, eg "rh3" or "rusty1". | |
154 | ||
155 | Using this automatically adds a checksum of the .c files and the | |
156 | local headers in "srcversion". | |
157 | */ | |
158 | #define MODULE_VERSION(_version) MODULE_INFO(version, _version) | |
159 | ||
187afbed JM |
160 | /* Optional firmware file (or files) needed by the module |
161 | * format is simply firmware file name. Multiple firmware | |
162 | * files require multiple MODULE_FIRMWARE() specifiers */ | |
163 | #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) | |
164 | ||
1da177e4 LT |
165 | /* Given an address, look for it in the exception tables */ |
166 | const struct exception_table_entry *search_exception_tables(unsigned long add); | |
167 | ||
168 | struct notifier_block; | |
169 | ||
170 | #ifdef CONFIG_MODULES | |
171 | ||
172 | /* Get/put a kernel symbol (calls must be symmetric) */ | |
173 | void *__symbol_get(const char *symbol); | |
174 | void *__symbol_get_gpl(const char *symbol); | |
175 | #define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x))) | |
176 | ||
177 | #ifndef __GENKSYMS__ | |
178 | #ifdef CONFIG_MODVERSIONS | |
179 | /* Mark the CRC weak since genksyms apparently decides not to | |
180 | * generate a checksums for some symbols */ | |
181 | #define __CRC_SYMBOL(sym, sec) \ | |
182 | extern void *__crc_##sym __attribute__((weak)); \ | |
183 | static const unsigned long __kcrctab_##sym \ | |
3ff6eecc | 184 | __used \ |
1da177e4 LT |
185 | __attribute__((section("__kcrctab" sec), unused)) \ |
186 | = (unsigned long) &__crc_##sym; | |
187 | #else | |
188 | #define __CRC_SYMBOL(sym, sec) | |
189 | #endif | |
190 | ||
191 | /* For every exported symbol, place a struct in the __ksymtab section */ | |
192 | #define __EXPORT_SYMBOL(sym, sec) \ | |
a1a8feed | 193 | extern typeof(sym) sym; \ |
1da177e4 LT |
194 | __CRC_SYMBOL(sym, sec) \ |
195 | static const char __kstrtab_##sym[] \ | |
ea01e798 | 196 | __attribute__((section("__ksymtab_strings"), aligned(1))) \ |
1da177e4 LT |
197 | = MODULE_SYMBOL_PREFIX #sym; \ |
198 | static const struct kernel_symbol __ksymtab_##sym \ | |
3ff6eecc | 199 | __used \ |
1da177e4 LT |
200 | __attribute__((section("__ksymtab" sec), unused)) \ |
201 | = { (unsigned long)&sym, __kstrtab_##sym } | |
202 | ||
203 | #define EXPORT_SYMBOL(sym) \ | |
204 | __EXPORT_SYMBOL(sym, "") | |
205 | ||
206 | #define EXPORT_SYMBOL_GPL(sym) \ | |
207 | __EXPORT_SYMBOL(sym, "_gpl") | |
208 | ||
9f28bb7e GKH |
209 | #define EXPORT_SYMBOL_GPL_FUTURE(sym) \ |
210 | __EXPORT_SYMBOL(sym, "_gpl_future") | |
211 | ||
f71d20e9 AV |
212 | |
213 | #ifdef CONFIG_UNUSED_SYMBOLS | |
214 | #define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused") | |
215 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl") | |
216 | #else | |
217 | #define EXPORT_UNUSED_SYMBOL(sym) | |
218 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) | |
219 | #endif | |
220 | ||
1da177e4 LT |
221 | #endif |
222 | ||
1da177e4 LT |
223 | enum module_state |
224 | { | |
225 | MODULE_STATE_LIVE, | |
226 | MODULE_STATE_COMING, | |
227 | MODULE_STATE_GOING, | |
228 | }; | |
229 | ||
1da177e4 LT |
230 | struct module |
231 | { | |
232 | enum module_state state; | |
233 | ||
234 | /* Member of list of modules */ | |
235 | struct list_head list; | |
236 | ||
237 | /* Unique handle for this module */ | |
238 | char name[MODULE_NAME_LEN]; | |
239 | ||
240 | /* Sysfs stuff. */ | |
241 | struct module_kobject mkobj; | |
03e88ae1 | 242 | struct module_attribute *modinfo_attrs; |
c988d2b2 MD |
243 | const char *version; |
244 | const char *srcversion; | |
270a6c4c | 245 | struct kobject *holders_dir; |
1da177e4 LT |
246 | |
247 | /* Exported symbols */ | |
248 | const struct kernel_symbol *syms; | |
1da177e4 | 249 | const unsigned long *crcs; |
af540689 | 250 | unsigned int num_syms; |
1da177e4 | 251 | |
e180a6b7 RR |
252 | /* Kernel parameters. */ |
253 | struct kernel_param *kp; | |
254 | unsigned int num_kp; | |
255 | ||
1da177e4 | 256 | /* GPL-only exported symbols. */ |
1da177e4 | 257 | unsigned int num_gpl_syms; |
af540689 | 258 | const struct kernel_symbol *gpl_syms; |
1da177e4 LT |
259 | const unsigned long *gpl_crcs; |
260 | ||
f7f5b675 | 261 | #ifdef CONFIG_UNUSED_SYMBOLS |
f71d20e9 AV |
262 | /* unused exported symbols. */ |
263 | const struct kernel_symbol *unused_syms; | |
f71d20e9 | 264 | const unsigned long *unused_crcs; |
af540689 RK |
265 | unsigned int num_unused_syms; |
266 | ||
f71d20e9 | 267 | /* GPL-only, unused exported symbols. */ |
f71d20e9 | 268 | unsigned int num_unused_gpl_syms; |
af540689 | 269 | const struct kernel_symbol *unused_gpl_syms; |
f71d20e9 | 270 | const unsigned long *unused_gpl_crcs; |
f7f5b675 | 271 | #endif |
f71d20e9 | 272 | |
9f28bb7e GKH |
273 | /* symbols that will be GPL-only in the near future. */ |
274 | const struct kernel_symbol *gpl_future_syms; | |
9f28bb7e | 275 | const unsigned long *gpl_future_crcs; |
af540689 | 276 | unsigned int num_gpl_future_syms; |
9f28bb7e | 277 | |
1da177e4 LT |
278 | /* Exception table */ |
279 | unsigned int num_exentries; | |
5e458cc0 | 280 | struct exception_table_entry *extable; |
1da177e4 LT |
281 | |
282 | /* Startup function. */ | |
283 | int (*init)(void); | |
284 | ||
285 | /* If this is non-NULL, vfree after init() returns */ | |
286 | void *module_init; | |
287 | ||
288 | /* Here is the actual code + data, vfree'd on unload. */ | |
289 | void *module_core; | |
290 | ||
291 | /* Here are the sizes of the init and core sections */ | |
2f0f2a33 | 292 | unsigned int init_size, core_size; |
1da177e4 LT |
293 | |
294 | /* The size of the executable code in each section. */ | |
2f0f2a33 | 295 | unsigned int init_text_size, core_text_size; |
1da177e4 LT |
296 | |
297 | /* Arch-specific module values */ | |
298 | struct mod_arch_specific arch; | |
299 | ||
2bc2d61a RD |
300 | unsigned int taints; /* same bits as kernel:tainted */ |
301 | ||
7664c5a1 JF |
302 | #ifdef CONFIG_GENERIC_BUG |
303 | /* Support for BUG */ | |
af540689 | 304 | unsigned num_bugs; |
7664c5a1 JF |
305 | struct list_head bug_list; |
306 | struct bug_entry *bug_table; | |
1da177e4 LT |
307 | #endif |
308 | ||
309 | #ifdef CONFIG_KALLSYMS | |
310 | /* We keep the symbol and string tables for kallsyms. */ | |
311 | Elf_Sym *symtab; | |
2f0f2a33 | 312 | unsigned int num_symtab; |
1da177e4 LT |
313 | char *strtab; |
314 | ||
315 | /* Section attributes */ | |
316 | struct module_sect_attrs *sect_attrs; | |
6d760133 RM |
317 | |
318 | /* Notes attributes */ | |
319 | struct module_notes_attrs *notes_attrs; | |
1da177e4 LT |
320 | #endif |
321 | ||
322 | /* Per-cpu data. */ | |
323 | void *percpu; | |
324 | ||
325 | /* The command line arguments (may be mangled). People like | |
326 | keeping pointers to this stuff */ | |
327 | char *args; | |
8256e47c MD |
328 | #ifdef CONFIG_MARKERS |
329 | struct marker *markers; | |
330 | unsigned int num_markers; | |
331 | #endif | |
97e1c18e MD |
332 | #ifdef CONFIG_TRACEPOINTS |
333 | struct tracepoint *tracepoints; | |
334 | unsigned int num_tracepoints; | |
335 | #endif | |
af540689 | 336 | |
769b0441 | 337 | #ifdef CONFIG_TRACING |
1ba28e02 LJ |
338 | const char **trace_bprintk_fmt_start; |
339 | unsigned int num_trace_bprintk_fmt; | |
340 | #endif | |
6d723736 SR |
341 | #ifdef CONFIG_EVENT_TRACING |
342 | struct ftrace_event_call *trace_events; | |
343 | unsigned int num_trace_events; | |
344 | #endif | |
93eb677d SR |
345 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
346 | unsigned long *ftrace_callsites; | |
347 | unsigned int num_ftrace_callsites; | |
348 | #endif | |
1ba28e02 | 349 | |
af540689 RK |
350 | #ifdef CONFIG_MODULE_UNLOAD |
351 | /* What modules depend on me? */ | |
352 | struct list_head modules_which_use_me; | |
353 | ||
354 | /* Who is waiting for us to be unloaded */ | |
355 | struct task_struct *waiter; | |
356 | ||
357 | /* Destruction function. */ | |
358 | void (*exit)(void); | |
359 | ||
720eba31 ED |
360 | #ifdef CONFIG_SMP |
361 | char *refptr; | |
362 | #else | |
363 | local_t ref; | |
364 | #endif | |
af540689 | 365 | #endif |
b99b87f7 PO |
366 | |
367 | #ifdef CONFIG_CONSTRUCTORS | |
368 | /* Constructor functions. */ | |
369 | ctor_fn_t *ctors; | |
370 | unsigned int num_ctors; | |
371 | #endif | |
1da177e4 | 372 | }; |
e61a1c1c RZ |
373 | #ifndef MODULE_ARCH_INIT |
374 | #define MODULE_ARCH_INIT {} | |
375 | #endif | |
1da177e4 | 376 | |
c6b37801 TA |
377 | extern struct mutex module_mutex; |
378 | ||
1da177e4 LT |
379 | /* FIXME: It'd be nice to isolate modules during init, too, so they |
380 | aren't used before they (may) fail. But presently too much code | |
381 | (IDE & SCSI) require entry into the module during init.*/ | |
382 | static inline int module_is_live(struct module *mod) | |
383 | { | |
384 | return mod->state != MODULE_STATE_GOING; | |
385 | } | |
386 | ||
1da177e4 | 387 | struct module *__module_text_address(unsigned long addr); |
e610499e RR |
388 | struct module *__module_address(unsigned long addr); |
389 | bool is_module_address(unsigned long addr); | |
390 | bool is_module_text_address(unsigned long addr); | |
1da177e4 | 391 | |
a06f6211 MH |
392 | static inline int within_module_core(unsigned long addr, struct module *mod) |
393 | { | |
394 | return (unsigned long)mod->module_core <= addr && | |
395 | addr < (unsigned long)mod->module_core + mod->core_size; | |
396 | } | |
397 | ||
398 | static inline int within_module_init(unsigned long addr, struct module *mod) | |
399 | { | |
400 | return (unsigned long)mod->module_init <= addr && | |
401 | addr < (unsigned long)mod->module_init + mod->init_size; | |
402 | } | |
403 | ||
c6b37801 TA |
404 | /* Search for module by name: must hold module_mutex. */ |
405 | struct module *find_module(const char *name); | |
406 | ||
407 | struct symsearch { | |
408 | const struct kernel_symbol *start, *stop; | |
409 | const unsigned long *crcs; | |
410 | enum { | |
411 | NOT_GPL_ONLY, | |
412 | GPL_ONLY, | |
413 | WILL_BE_GPL_ONLY, | |
414 | } licence; | |
415 | bool unused; | |
416 | }; | |
417 | ||
418 | /* Search for an exported symbol by name. */ | |
419 | const struct kernel_symbol *find_symbol(const char *name, | |
420 | struct module **owner, | |
421 | const unsigned long **crc, | |
422 | bool gplok, | |
423 | bool warn); | |
424 | ||
425 | /* Walk the exported symbol table */ | |
426 | bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner, | |
427 | unsigned int symnum, void *data), void *data); | |
428 | ||
ea07890a | 429 | /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if |
1da177e4 | 430 | symnum out of range. */ |
ea07890a AD |
431 | int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, |
432 | char *name, char *module_name, int *exported); | |
1da177e4 LT |
433 | |
434 | /* Look for this name: can be of form module:name. */ | |
435 | unsigned long module_kallsyms_lookup_name(const char *name); | |
436 | ||
75a66614 AK |
437 | int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
438 | struct module *, unsigned long), | |
439 | void *data); | |
440 | ||
1da177e4 LT |
441 | extern void __module_put_and_exit(struct module *mod, long code) |
442 | __attribute__((noreturn)); | |
443 | #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code); | |
444 | ||
445 | #ifdef CONFIG_MODULE_UNLOAD | |
446 | unsigned int module_refcount(struct module *mod); | |
447 | void __symbol_put(const char *symbol); | |
448 | #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x) | |
449 | void symbol_put_addr(void *addr); | |
450 | ||
720eba31 ED |
451 | static inline local_t *__module_ref_addr(struct module *mod, int cpu) |
452 | { | |
453 | #ifdef CONFIG_SMP | |
454 | return (local_t *) (mod->refptr + per_cpu_offset(cpu)); | |
455 | #else | |
456 | return &mod->ref; | |
457 | #endif | |
458 | } | |
459 | ||
1da177e4 LT |
460 | /* Sometimes we know we already have a refcount, and it's easier not |
461 | to handle the error case (which only happens with rmmod --wait). */ | |
462 | static inline void __module_get(struct module *module) | |
463 | { | |
464 | if (module) { | |
720eba31 | 465 | local_inc(__module_ref_addr(module, get_cpu())); |
1da177e4 LT |
466 | put_cpu(); |
467 | } | |
468 | } | |
469 | ||
470 | static inline int try_module_get(struct module *module) | |
471 | { | |
472 | int ret = 1; | |
473 | ||
474 | if (module) { | |
475 | unsigned int cpu = get_cpu(); | |
476 | if (likely(module_is_live(module))) | |
720eba31 | 477 | local_inc(__module_ref_addr(module, cpu)); |
1da177e4 LT |
478 | else |
479 | ret = 0; | |
480 | put_cpu(); | |
481 | } | |
482 | return ret; | |
483 | } | |
484 | ||
f6a57033 | 485 | extern void module_put(struct module *module); |
1da177e4 LT |
486 | |
487 | #else /*!CONFIG_MODULE_UNLOAD*/ | |
488 | static inline int try_module_get(struct module *module) | |
489 | { | |
490 | return !module || module_is_live(module); | |
491 | } | |
492 | static inline void module_put(struct module *module) | |
493 | { | |
494 | } | |
495 | static inline void __module_get(struct module *module) | |
496 | { | |
497 | } | |
498 | #define symbol_put(x) do { } while(0) | |
499 | #define symbol_put_addr(p) do { } while(0) | |
500 | ||
501 | #endif /* CONFIG_MODULE_UNLOAD */ | |
c6b37801 | 502 | int use_module(struct module *a, struct module *b); |
1da177e4 LT |
503 | |
504 | /* This is a #define so the string doesn't get put in every .o file */ | |
505 | #define module_name(mod) \ | |
506 | ({ \ | |
507 | struct module *__mod = (mod); \ | |
508 | __mod ? __mod->name : "kernel"; \ | |
509 | }) | |
510 | ||
6dd06c9f RR |
511 | /* For kallsyms to ask for address resolution. namebuf should be at |
512 | * least KSYM_NAME_LEN long: a pointer to namebuf is returned if | |
513 | * found, otherwise NULL. */ | |
92dfc9dc | 514 | const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
515 | unsigned long *symbolsize, |
516 | unsigned long *offset, | |
517 | char **modname, | |
518 | char *namebuf); | |
9d65cb4a | 519 | int lookup_module_symbol_name(unsigned long addr, char *symname); |
a5c43dae | 520 | int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); |
1da177e4 LT |
521 | |
522 | /* For extable.c to search modules' exception tables. */ | |
523 | const struct exception_table_entry *search_module_extables(unsigned long addr); | |
524 | ||
525 | int register_module_notifier(struct notifier_block * nb); | |
526 | int unregister_module_notifier(struct notifier_block * nb); | |
527 | ||
528 | extern void print_modules(void); | |
529 | ||
fb40bd78 | 530 | extern void module_update_markers(void); |
8256e47c | 531 | |
97e1c18e MD |
532 | extern void module_update_tracepoints(void); |
533 | extern int module_get_iter_tracepoints(struct tracepoint_iter *iter); | |
534 | ||
1da177e4 LT |
535 | #else /* !CONFIG_MODULES... */ |
536 | #define EXPORT_SYMBOL(sym) | |
537 | #define EXPORT_SYMBOL_GPL(sym) | |
9f28bb7e | 538 | #define EXPORT_SYMBOL_GPL_FUTURE(sym) |
f71d20e9 AV |
539 | #define EXPORT_UNUSED_SYMBOL(sym) |
540 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) | |
1da177e4 LT |
541 | |
542 | /* Given an address, look for it in the exception tables. */ | |
543 | static inline const struct exception_table_entry * | |
544 | search_module_extables(unsigned long addr) | |
545 | { | |
546 | return NULL; | |
547 | } | |
548 | ||
e610499e RR |
549 | static inline struct module *__module_address(unsigned long addr) |
550 | { | |
551 | return NULL; | |
552 | } | |
553 | ||
1da177e4 LT |
554 | static inline struct module *__module_text_address(unsigned long addr) |
555 | { | |
556 | return NULL; | |
557 | } | |
558 | ||
e610499e RR |
559 | static inline bool is_module_address(unsigned long addr) |
560 | { | |
561 | return false; | |
562 | } | |
563 | ||
564 | static inline bool is_module_text_address(unsigned long addr) | |
4d435f9d | 565 | { |
e610499e | 566 | return false; |
4d435f9d IM |
567 | } |
568 | ||
1da177e4 LT |
569 | /* Get/put a kernel symbol (calls should be symmetric) */ |
570 | #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); }) | |
571 | #define symbol_put(x) do { } while(0) | |
572 | #define symbol_put_addr(x) do { } while(0) | |
573 | ||
574 | static inline void __module_get(struct module *module) | |
575 | { | |
576 | } | |
577 | ||
578 | static inline int try_module_get(struct module *module) | |
579 | { | |
580 | return 1; | |
581 | } | |
582 | ||
583 | static inline void module_put(struct module *module) | |
584 | { | |
585 | } | |
586 | ||
587 | #define module_name(mod) "kernel" | |
588 | ||
1da177e4 | 589 | /* For kallsyms to ask for address resolution. NULL means not found. */ |
92dfc9dc | 590 | static inline const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
591 | unsigned long *symbolsize, |
592 | unsigned long *offset, | |
593 | char **modname, | |
594 | char *namebuf) | |
1da177e4 LT |
595 | { |
596 | return NULL; | |
597 | } | |
598 | ||
9d65cb4a AD |
599 | static inline int lookup_module_symbol_name(unsigned long addr, char *symname) |
600 | { | |
601 | return -ERANGE; | |
602 | } | |
603 | ||
a5c43dae AD |
604 | static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) |
605 | { | |
606 | return -ERANGE; | |
607 | } | |
608 | ||
ea07890a AD |
609 | static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, |
610 | char *type, char *name, | |
611 | char *module_name, int *exported) | |
1da177e4 | 612 | { |
ea07890a | 613 | return -ERANGE; |
1da177e4 LT |
614 | } |
615 | ||
616 | static inline unsigned long module_kallsyms_lookup_name(const char *name) | |
617 | { | |
618 | return 0; | |
619 | } | |
620 | ||
75a66614 AK |
621 | static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
622 | struct module *, | |
623 | unsigned long), | |
624 | void *data) | |
625 | { | |
626 | return 0; | |
627 | } | |
628 | ||
1da177e4 LT |
629 | static inline int register_module_notifier(struct notifier_block * nb) |
630 | { | |
631 | /* no events will happen anyway, so this can always succeed */ | |
632 | return 0; | |
633 | } | |
634 | ||
635 | static inline int unregister_module_notifier(struct notifier_block * nb) | |
636 | { | |
637 | return 0; | |
638 | } | |
639 | ||
640 | #define module_put_and_exit(code) do_exit(code) | |
641 | ||
642 | static inline void print_modules(void) | |
643 | { | |
644 | } | |
645 | ||
1387d0d8 | 646 | static inline void module_update_markers(void) |
8256e47c MD |
647 | { |
648 | } | |
649 | ||
97e1c18e MD |
650 | static inline void module_update_tracepoints(void) |
651 | { | |
652 | } | |
653 | ||
654 | static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter) | |
655 | { | |
656 | return 0; | |
657 | } | |
658 | ||
ef665c1a RD |
659 | #endif /* CONFIG_MODULES */ |
660 | ||
1da177e4 | 661 | struct device_driver; |
ef665c1a | 662 | #ifdef CONFIG_SYSFS |
1da177e4 LT |
663 | struct module; |
664 | ||
7405c1e1 GKH |
665 | extern struct kset *module_kset; |
666 | extern struct kobj_type module_ktype; | |
667 | extern int module_sysfs_initialized; | |
ef665c1a RD |
668 | |
669 | int mod_sysfs_init(struct module *mod); | |
670 | int mod_sysfs_setup(struct module *mod, | |
671 | struct kernel_param *kparam, | |
672 | unsigned int num_params); | |
673 | int module_add_modinfo_attrs(struct module *mod); | |
674 | void module_remove_modinfo_attrs(struct module *mod); | |
675 | ||
676 | #else /* !CONFIG_SYSFS */ | |
677 | ||
678 | static inline int mod_sysfs_init(struct module *mod) | |
1da177e4 | 679 | { |
ef665c1a | 680 | return 0; |
1da177e4 LT |
681 | } |
682 | ||
ef665c1a RD |
683 | static inline int mod_sysfs_setup(struct module *mod, |
684 | struct kernel_param *kparam, | |
685 | unsigned int num_params) | |
1da177e4 | 686 | { |
ef665c1a | 687 | return 0; |
1da177e4 LT |
688 | } |
689 | ||
ef665c1a RD |
690 | static inline int module_add_modinfo_attrs(struct module *mod) |
691 | { | |
692 | return 0; | |
693 | } | |
694 | ||
695 | static inline void module_remove_modinfo_attrs(struct module *mod) | |
696 | { } | |
697 | ||
698 | #endif /* CONFIG_SYSFS */ | |
699 | ||
1da177e4 LT |
700 | #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) |
701 | ||
702 | /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ | |
703 | ||
1da177e4 LT |
704 | #define __MODULE_STRING(x) __stringify(x) |
705 | ||
0d9c25dd AM |
706 | |
707 | #ifdef CONFIG_GENERIC_BUG | |
708 | int module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, | |
709 | struct module *); | |
710 | void module_bug_cleanup(struct module *); | |
711 | ||
712 | #else /* !CONFIG_GENERIC_BUG */ | |
713 | ||
714 | static inline int module_bug_finalize(const Elf_Ehdr *hdr, | |
715 | const Elf_Shdr *sechdrs, | |
716 | struct module *mod) | |
717 | { | |
718 | return 0; | |
719 | } | |
720 | static inline void module_bug_cleanup(struct module *mod) {} | |
721 | #endif /* CONFIG_GENERIC_BUG */ | |
722 | ||
1da177e4 | 723 | #endif /* _LINUX_MODULE_H */ |