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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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 Torvalds1da177e2005-04-16 15:20:36 -07009#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>
Mathieu Desnoyers8256e472007-10-18 23:41:06 -070018#include <linux/marker.h>
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -040019#include <linux/tracepoint.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <asm/local.h>
21
22#include <asm/module.h>
23
24/* Not Yet Implemented */
25#define MODULE_SUPPORTED_DEVICE(name)
26
Adrian Bunkf606ddf2008-07-23 21:28:50 -070027/* some toolchains uses a `_' prefix for all user symbols */
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#ifndef MODULE_SYMBOL_PREFIX
29#define MODULE_SYMBOL_PREFIX ""
30#endif
31
Rusty Russell730b69d2008-10-22 10:00:22 -050032#define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
34struct kernel_symbol
35{
36 unsigned long value;
37 const char *name;
38};
39
40struct modversion_info
41{
42 unsigned long crc;
43 char name[MODULE_NAME_LEN];
44};
45
46struct module;
47
48struct 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 Domschc988d2b2005-06-23 22:05:15 -070053 void (*setup)(struct module *, const char *);
54 int (*test)(struct module *);
55 void (*free)(struct module *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056};
57
58struct module_kobject
59{
60 struct kobject kobj;
61 struct module *mod;
Kay Sieversf30c53a2007-01-15 20:22:02 +010062 struct kobject *drivers_dir;
Rusty Russell9b473de2008-10-22 10:00:22 -050063 struct module_param_attrs *mp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064};
65
66/* These are either module local, or the kernel's dummy ones. */
67extern int init_module(void);
68extern void cleanup_module(void);
69
70/* Archs provide a method of finding the correct exception table. */
71struct exception_table_entry;
72
73const struct exception_table_entry *
74search_extable(const struct exception_table_entry *first,
75 const struct exception_table_entry *last,
76 unsigned long value);
77void sort_extable(struct exception_table_entry *start,
78 struct exception_table_entry *finish);
79void sort_main_extable(void);
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081#ifdef MODULE
82#define MODULE_GENERIC_TABLE(gtype,name) \
83extern const struct gtype##_id __mod_##gtype##_table \
84 __attribute__ ((unused, alias(__stringify(name))))
85
86extern 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 Perez8d27e902006-06-23 02:05:13 -0700108 * "Dual MIT/GPL" [GNU Public License v2
109 * or MIT license choice]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 * "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
Rene Herman108f39a2007-05-10 22:22:50 -0700129/* Author, ideally of form NAME[, NAME]*[ and NAME] */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130#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
Jon Masters187afbe2006-08-28 17:08:21 -0500159/* Optional firmware file (or files) needed by the module
160 * format is simply firmware file name. Multiple firmware
161 * files require multiple MODULE_FIRMWARE() specifiers */
162#define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
163
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164/* Given an address, look for it in the exception tables */
165const struct exception_table_entry *search_exception_tables(unsigned long add);
166
167struct notifier_block;
168
169#ifdef CONFIG_MODULES
170
171/* Get/put a kernel symbol (calls must be symmetric) */
172void *__symbol_get(const char *symbol);
173void *__symbol_get_gpl(const char *symbol);
174#define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x)))
175
176#ifndef __GENKSYMS__
177#ifdef CONFIG_MODVERSIONS
178/* Mark the CRC weak since genksyms apparently decides not to
179 * generate a checksums for some symbols */
180#define __CRC_SYMBOL(sym, sec) \
181 extern void *__crc_##sym __attribute__((weak)); \
182 static const unsigned long __kcrctab_##sym \
Adrian Bunk3ff6eec2008-01-24 22:16:20 +0100183 __used \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 __attribute__((section("__kcrctab" sec), unused)) \
185 = (unsigned long) &__crc_##sym;
186#else
187#define __CRC_SYMBOL(sym, sec)
188#endif
189
190/* For every exported symbol, place a struct in the __ksymtab section */
191#define __EXPORT_SYMBOL(sym, sec) \
Patrick McHardya1a8fee2006-03-23 22:07:34 -0800192 extern typeof(sym) sym; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 __CRC_SYMBOL(sym, sec) \
194 static const char __kstrtab_##sym[] \
Rusty Russellea01e792008-03-13 09:02:17 +0000195 __attribute__((section("__ksymtab_strings"), aligned(1))) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 = MODULE_SYMBOL_PREFIX #sym; \
197 static const struct kernel_symbol __ksymtab_##sym \
Adrian Bunk3ff6eec2008-01-24 22:16:20 +0100198 __used \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 __attribute__((section("__ksymtab" sec), unused)) \
200 = { (unsigned long)&sym, __kstrtab_##sym }
201
202#define EXPORT_SYMBOL(sym) \
203 __EXPORT_SYMBOL(sym, "")
204
205#define EXPORT_SYMBOL_GPL(sym) \
206 __EXPORT_SYMBOL(sym, "_gpl")
207
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800208#define EXPORT_SYMBOL_GPL_FUTURE(sym) \
209 __EXPORT_SYMBOL(sym, "_gpl_future")
210
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700211
212#ifdef CONFIG_UNUSED_SYMBOLS
213#define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
214#define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
215#else
216#define EXPORT_UNUSED_SYMBOL(sym)
217#define EXPORT_UNUSED_SYMBOL_GPL(sym)
218#endif
219
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220#endif
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222enum module_state
223{
224 MODULE_STATE_LIVE,
225 MODULE_STATE_COMING,
226 MODULE_STATE_GOING,
227};
228
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229struct module
230{
231 enum module_state state;
232
233 /* Member of list of modules */
234 struct list_head list;
235
236 /* Unique handle for this module */
237 char name[MODULE_NAME_LEN];
238
239 /* Sysfs stuff. */
240 struct module_kobject mkobj;
Greg Kroah-Hartman03e88ae12006-02-16 13:50:23 -0800241 struct module_attribute *modinfo_attrs;
Matt Domschc988d2b2005-06-23 22:05:15 -0700242 const char *version;
243 const char *srcversion;
Kay Sievers270a6c42007-01-18 13:26:15 +0100244 struct kobject *holders_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
246 /* Exported symbols */
247 const struct kernel_symbol *syms;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 const unsigned long *crcs;
Richard Kennedyaf540682008-07-22 19:24:26 -0500249 unsigned int num_syms;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251 /* GPL-only exported symbols. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 unsigned int num_gpl_syms;
Richard Kennedyaf540682008-07-22 19:24:26 -0500253 const struct kernel_symbol *gpl_syms;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 const unsigned long *gpl_crcs;
255
Denys Vlasenkof7f5b672008-07-22 19:24:26 -0500256#ifdef CONFIG_UNUSED_SYMBOLS
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700257 /* unused exported symbols. */
258 const struct kernel_symbol *unused_syms;
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700259 const unsigned long *unused_crcs;
Richard Kennedyaf540682008-07-22 19:24:26 -0500260 unsigned int num_unused_syms;
261
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700262 /* GPL-only, unused exported symbols. */
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700263 unsigned int num_unused_gpl_syms;
Richard Kennedyaf540682008-07-22 19:24:26 -0500264 const struct kernel_symbol *unused_gpl_syms;
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700265 const unsigned long *unused_gpl_crcs;
Denys Vlasenkof7f5b672008-07-22 19:24:26 -0500266#endif
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700267
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800268 /* symbols that will be GPL-only in the near future. */
269 const struct kernel_symbol *gpl_future_syms;
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800270 const unsigned long *gpl_future_crcs;
Richard Kennedyaf540682008-07-22 19:24:26 -0500271 unsigned int num_gpl_future_syms;
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 /* Exception table */
274 unsigned int num_exentries;
Rusty Russell5e458cc2008-10-22 10:00:13 -0500275 struct exception_table_entry *extable;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
277 /* Startup function. */
278 int (*init)(void);
279
280 /* If this is non-NULL, vfree after init() returns */
281 void *module_init;
282
283 /* Here is the actual code + data, vfree'd on unload. */
284 void *module_core;
285
286 /* Here are the sizes of the init and core sections */
Denys Vlasenko2f0f2a32008-07-22 19:24:27 -0500287 unsigned int init_size, core_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
289 /* The size of the executable code in each section. */
Denys Vlasenko2f0f2a32008-07-22 19:24:27 -0500290 unsigned int init_text_size, core_text_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
292 /* Arch-specific module values */
293 struct mod_arch_specific arch;
294
Randy Dunlap2bc2d612006-10-02 02:17:02 -0700295 unsigned int taints; /* same bits as kernel:tainted */
296
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800297#ifdef CONFIG_GENERIC_BUG
298 /* Support for BUG */
Richard Kennedyaf540682008-07-22 19:24:26 -0500299 unsigned num_bugs;
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800300 struct list_head bug_list;
301 struct bug_entry *bug_table;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302#endif
303
304#ifdef CONFIG_KALLSYMS
305 /* We keep the symbol and string tables for kallsyms. */
306 Elf_Sym *symtab;
Denys Vlasenko2f0f2a32008-07-22 19:24:27 -0500307 unsigned int num_symtab;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 char *strtab;
309
310 /* Section attributes */
311 struct module_sect_attrs *sect_attrs;
Roland McGrath6d760132007-10-16 23:26:40 -0700312
313 /* Notes attributes */
314 struct module_notes_attrs *notes_attrs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315#endif
316
317 /* Per-cpu data. */
318 void *percpu;
319
320 /* The command line arguments (may be mangled). People like
321 keeping pointers to this stuff */
322 char *args;
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700323#ifdef CONFIG_MARKERS
324 struct marker *markers;
325 unsigned int num_markers;
326#endif
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400327#ifdef CONFIG_TRACEPOINTS
328 struct tracepoint *tracepoints;
329 unsigned int num_tracepoints;
330#endif
Richard Kennedyaf540682008-07-22 19:24:26 -0500331
332#ifdef CONFIG_MODULE_UNLOAD
333 /* What modules depend on me? */
334 struct list_head modules_which_use_me;
335
336 /* Who is waiting for us to be unloaded */
337 struct task_struct *waiter;
338
339 /* Destruction function. */
340 void (*exit)(void);
341
Eric Dumazet720eba32009-02-03 13:31:36 +1030342#ifdef CONFIG_SMP
343 char *refptr;
344#else
345 local_t ref;
346#endif
Richard Kennedyaf540682008-07-22 19:24:26 -0500347#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348};
Roman Zippele61a1c12007-05-09 02:35:15 -0700349#ifndef MODULE_ARCH_INIT
350#define MODULE_ARCH_INIT {}
351#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
353/* FIXME: It'd be nice to isolate modules during init, too, so they
354 aren't used before they (may) fail. But presently too much code
355 (IDE & SCSI) require entry into the module during init.*/
356static inline int module_is_live(struct module *mod)
357{
358 return mod->state != MODULE_STATE_GOING;
359}
360
361/* Is this address in a module? (second is with no locks, for oops) */
362struct module *module_text_address(unsigned long addr);
363struct module *__module_text_address(unsigned long addr);
Ingo Molnar4d435f92006-07-03 00:24:24 -0700364int is_module_address(unsigned long addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
Masami Hiramatsua06f6212009-01-06 14:41:49 -0800366static inline int within_module_core(unsigned long addr, struct module *mod)
367{
368 return (unsigned long)mod->module_core <= addr &&
369 addr < (unsigned long)mod->module_core + mod->core_size;
370}
371
372static inline int within_module_init(unsigned long addr, struct module *mod)
373{
374 return (unsigned long)mod->module_init <= addr &&
375 addr < (unsigned long)mod->module_init + mod->init_size;
376}
377
Alexey Dobriyanea078902007-05-08 00:28:39 -0700378/* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 symnum out of range. */
Alexey Dobriyanea078902007-05-08 00:28:39 -0700380int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
381 char *name, char *module_name, int *exported);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
383/* Look for this name: can be of form module:name. */
384unsigned long module_kallsyms_lookup_name(const char *name);
385
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386extern void __module_put_and_exit(struct module *mod, long code)
387 __attribute__((noreturn));
388#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
389
390#ifdef CONFIG_MODULE_UNLOAD
391unsigned int module_refcount(struct module *mod);
392void __symbol_put(const char *symbol);
393#define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
394void symbol_put_addr(void *addr);
395
Eric Dumazet720eba32009-02-03 13:31:36 +1030396static inline local_t *__module_ref_addr(struct module *mod, int cpu)
397{
398#ifdef CONFIG_SMP
399 return (local_t *) (mod->refptr + per_cpu_offset(cpu));
400#else
401 return &mod->ref;
402#endif
403}
404
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405/* Sometimes we know we already have a refcount, and it's easier not
406 to handle the error case (which only happens with rmmod --wait). */
407static inline void __module_get(struct module *module)
408{
409 if (module) {
Eric Dumazet720eba32009-02-03 13:31:36 +1030410 local_inc(__module_ref_addr(module, get_cpu()));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 put_cpu();
412 }
413}
414
415static inline int try_module_get(struct module *module)
416{
417 int ret = 1;
418
419 if (module) {
420 unsigned int cpu = get_cpu();
421 if (likely(module_is_live(module)))
Eric Dumazet720eba32009-02-03 13:31:36 +1030422 local_inc(__module_ref_addr(module, cpu));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 else
424 ret = 0;
425 put_cpu();
426 }
427 return ret;
428}
429
Al Virof6a57032006-10-18 01:47:25 -0400430extern void module_put(struct module *module);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432#else /*!CONFIG_MODULE_UNLOAD*/
433static inline int try_module_get(struct module *module)
434{
435 return !module || module_is_live(module);
436}
437static inline void module_put(struct module *module)
438{
439}
440static inline void __module_get(struct module *module)
441{
442}
443#define symbol_put(x) do { } while(0)
444#define symbol_put_addr(p) do { } while(0)
445
446#endif /* CONFIG_MODULE_UNLOAD */
447
448/* This is a #define so the string doesn't get put in every .o file */
449#define module_name(mod) \
450({ \
451 struct module *__mod = (mod); \
452 __mod ? __mod->name : "kernel"; \
453})
454
Rusty Russell6dd06c92008-01-29 17:13:22 -0500455/* For kallsyms to ask for address resolution. namebuf should be at
456 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
457 * found, otherwise NULL. */
Andrew Morton92dfc9d2008-02-08 04:18:43 -0800458const char *module_address_lookup(unsigned long addr,
Rusty Russell6dd06c92008-01-29 17:13:22 -0500459 unsigned long *symbolsize,
460 unsigned long *offset,
461 char **modname,
462 char *namebuf);
Alexey Dobriyan9d65cb42007-05-08 00:28:43 -0700463int lookup_module_symbol_name(unsigned long addr, char *symname);
Alexey Dobriyana5c43da2007-05-08 00:28:47 -0700464int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
466/* For extable.c to search modules' exception tables. */
467const struct exception_table_entry *search_module_extables(unsigned long addr);
468
469int register_module_notifier(struct notifier_block * nb);
470int unregister_module_notifier(struct notifier_block * nb);
471
472extern void print_modules(void);
473
Mathieu Desnoyersfb40bd72008-02-13 15:03:37 -0800474extern void module_update_markers(void);
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700475
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400476extern void module_update_tracepoints(void);
477extern int module_get_iter_tracepoints(struct tracepoint_iter *iter);
478
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479#else /* !CONFIG_MODULES... */
480#define EXPORT_SYMBOL(sym)
481#define EXPORT_SYMBOL_GPL(sym)
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800482#define EXPORT_SYMBOL_GPL_FUTURE(sym)
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700483#define EXPORT_UNUSED_SYMBOL(sym)
484#define EXPORT_UNUSED_SYMBOL_GPL(sym)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
486/* Given an address, look for it in the exception tables. */
487static inline const struct exception_table_entry *
488search_module_extables(unsigned long addr)
489{
490 return NULL;
491}
492
493/* Is this address in a module? */
494static inline struct module *module_text_address(unsigned long addr)
495{
496 return NULL;
497}
498
499/* Is this address in a module? (don't take a lock, we're oopsing) */
500static inline struct module *__module_text_address(unsigned long addr)
501{
502 return NULL;
503}
504
Ingo Molnar4d435f92006-07-03 00:24:24 -0700505static inline int is_module_address(unsigned long addr)
506{
507 return 0;
508}
509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510/* Get/put a kernel symbol (calls should be symmetric) */
511#define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
512#define symbol_put(x) do { } while(0)
513#define symbol_put_addr(x) do { } while(0)
514
515static inline void __module_get(struct module *module)
516{
517}
518
519static inline int try_module_get(struct module *module)
520{
521 return 1;
522}
523
524static inline void module_put(struct module *module)
525{
526}
527
528#define module_name(mod) "kernel"
529
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530/* For kallsyms to ask for address resolution. NULL means not found. */
Andrew Morton92dfc9d2008-02-08 04:18:43 -0800531static inline const char *module_address_lookup(unsigned long addr,
Rusty Russell6dd06c92008-01-29 17:13:22 -0500532 unsigned long *symbolsize,
533 unsigned long *offset,
534 char **modname,
535 char *namebuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536{
537 return NULL;
538}
539
Alexey Dobriyan9d65cb42007-05-08 00:28:43 -0700540static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
541{
542 return -ERANGE;
543}
544
Alexey Dobriyana5c43da2007-05-08 00:28:47 -0700545static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
546{
547 return -ERANGE;
548}
549
Alexey Dobriyanea078902007-05-08 00:28:39 -0700550static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
551 char *type, char *name,
552 char *module_name, int *exported)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553{
Alexey Dobriyanea078902007-05-08 00:28:39 -0700554 return -ERANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555}
556
557static inline unsigned long module_kallsyms_lookup_name(const char *name)
558{
559 return 0;
560}
561
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562static inline int register_module_notifier(struct notifier_block * nb)
563{
564 /* no events will happen anyway, so this can always succeed */
565 return 0;
566}
567
568static inline int unregister_module_notifier(struct notifier_block * nb)
569{
570 return 0;
571}
572
573#define module_put_and_exit(code) do_exit(code)
574
575static inline void print_modules(void)
576{
577}
578
Adrian Bunk1387d0d2008-02-14 19:31:20 -0800579static inline void module_update_markers(void)
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700580{
581}
582
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400583static inline void module_update_tracepoints(void)
584{
585}
586
587static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter)
588{
589 return 0;
590}
591
Randy Dunlapef665c12007-02-13 15:19:06 -0800592#endif /* CONFIG_MODULES */
593
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594struct device_driver;
Randy Dunlapef665c12007-02-13 15:19:06 -0800595#ifdef CONFIG_SYSFS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596struct module;
597
Greg Kroah-Hartman7405c1e2007-11-01 10:39:50 -0700598extern struct kset *module_kset;
599extern struct kobj_type module_ktype;
600extern int module_sysfs_initialized;
Randy Dunlapef665c12007-02-13 15:19:06 -0800601
602int mod_sysfs_init(struct module *mod);
603int mod_sysfs_setup(struct module *mod,
604 struct kernel_param *kparam,
605 unsigned int num_params);
606int module_add_modinfo_attrs(struct module *mod);
607void module_remove_modinfo_attrs(struct module *mod);
608
609#else /* !CONFIG_SYSFS */
610
611static inline int mod_sysfs_init(struct module *mod)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612{
Randy Dunlapef665c12007-02-13 15:19:06 -0800613 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614}
615
Randy Dunlapef665c12007-02-13 15:19:06 -0800616static inline int mod_sysfs_setup(struct module *mod,
617 struct kernel_param *kparam,
618 unsigned int num_params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619{
Randy Dunlapef665c12007-02-13 15:19:06 -0800620 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621}
622
Randy Dunlapef665c12007-02-13 15:19:06 -0800623static inline int module_add_modinfo_attrs(struct module *mod)
624{
625 return 0;
626}
627
628static inline void module_remove_modinfo_attrs(struct module *mod)
629{ }
630
631#endif /* CONFIG_SYSFS */
632
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633#define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
634
635/* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
636
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637#define __MODULE_STRING(x) __stringify(x)
638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639#endif /* _LINUX_MODULE_H */