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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> | |
97e1c18e | 18 | #include <linux/tracepoint.h> |
1da177e4 | 19 | |
e1783a24 | 20 | #include <linux/percpu.h> |
1da177e4 LT |
21 | #include <asm/module.h> |
22 | ||
7ead8b83 LZ |
23 | #include <trace/events/module.h> |
24 | ||
1da177e4 LT |
25 | /* Not Yet Implemented */ |
26 | #define MODULE_SUPPORTED_DEVICE(name) | |
27 | ||
9e1b9b80 AJ |
28 | /* Some toolchains use a `_' prefix for all user symbols. */ |
29 | #ifdef CONFIG_SYMBOL_PREFIX | |
30 | #define MODULE_SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX | |
31 | #else | |
1da177e4 LT |
32 | #define MODULE_SYMBOL_PREFIX "" |
33 | #endif | |
34 | ||
730b69d2 | 35 | #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN |
1da177e4 LT |
36 | |
37 | struct kernel_symbol | |
38 | { | |
39 | unsigned long value; | |
40 | const char *name; | |
41 | }; | |
42 | ||
43 | struct modversion_info | |
44 | { | |
45 | unsigned long crc; | |
46 | char name[MODULE_NAME_LEN]; | |
47 | }; | |
48 | ||
49 | struct module; | |
50 | ||
51 | struct module_attribute { | |
52 | struct attribute attr; | |
53 | ssize_t (*show)(struct module_attribute *, struct module *, char *); | |
54 | ssize_t (*store)(struct module_attribute *, struct module *, | |
55 | const char *, size_t count); | |
c988d2b2 MD |
56 | void (*setup)(struct module *, const char *); |
57 | int (*test)(struct module *); | |
58 | void (*free)(struct module *); | |
1da177e4 LT |
59 | }; |
60 | ||
61 | struct module_kobject | |
62 | { | |
63 | struct kobject kobj; | |
64 | struct module *mod; | |
f30c53a8 | 65 | struct kobject *drivers_dir; |
9b473de8 | 66 | struct module_param_attrs *mp; |
1da177e4 LT |
67 | }; |
68 | ||
69 | /* These are either module local, or the kernel's dummy ones. */ | |
70 | extern int init_module(void); | |
71 | extern void cleanup_module(void); | |
72 | ||
73 | /* Archs provide a method of finding the correct exception table. */ | |
74 | struct exception_table_entry; | |
75 | ||
76 | const struct exception_table_entry * | |
77 | search_extable(const struct exception_table_entry *first, | |
78 | const struct exception_table_entry *last, | |
79 | unsigned long value); | |
80 | void sort_extable(struct exception_table_entry *start, | |
81 | struct exception_table_entry *finish); | |
82 | void sort_main_extable(void); | |
ad6561df | 83 | void trim_init_extable(struct module *m); |
1da177e4 | 84 | |
1da177e4 LT |
85 | #ifdef MODULE |
86 | #define MODULE_GENERIC_TABLE(gtype,name) \ | |
87 | extern const struct gtype##_id __mod_##gtype##_table \ | |
88 | __attribute__ ((unused, alias(__stringify(name)))) | |
89 | ||
90 | extern struct module __this_module; | |
91 | #define THIS_MODULE (&__this_module) | |
92 | #else /* !MODULE */ | |
93 | #define MODULE_GENERIC_TABLE(gtype,name) | |
94 | #define THIS_MODULE ((struct module *)0) | |
95 | #endif | |
96 | ||
97 | /* Generic info of form tag = "info" */ | |
98 | #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) | |
99 | ||
100 | /* For userspace: you can also call me... */ | |
101 | #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias) | |
102 | ||
103 | /* | |
104 | * The following license idents are currently accepted as indicating free | |
105 | * software modules | |
106 | * | |
107 | * "GPL" [GNU Public License v2 or later] | |
108 | * "GPL v2" [GNU Public License v2] | |
109 | * "GPL and additional rights" [GNU Public License v2 rights and more] | |
110 | * "Dual BSD/GPL" [GNU Public License v2 | |
111 | * or BSD license choice] | |
8d27e908 XVP |
112 | * "Dual MIT/GPL" [GNU Public License v2 |
113 | * or MIT license choice] | |
1da177e4 LT |
114 | * "Dual MPL/GPL" [GNU Public License v2 |
115 | * or Mozilla license choice] | |
116 | * | |
117 | * The following other idents are available | |
118 | * | |
119 | * "Proprietary" [Non free products] | |
120 | * | |
121 | * There are dual licensed components, but when running with Linux it is the | |
122 | * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL | |
123 | * is a GPL combined work. | |
124 | * | |
125 | * This exists for several reasons | |
126 | * 1. So modinfo can show license info for users wanting to vet their setup | |
127 | * is free | |
128 | * 2. So the community can ignore bug reports including proprietary modules | |
129 | * 3. So vendors can do likewise based on their own policies | |
130 | */ | |
131 | #define MODULE_LICENSE(_license) MODULE_INFO(license, _license) | |
132 | ||
1d7015ca JB |
133 | /* |
134 | * Author(s), use "Name <email>" or just "Name", for multiple | |
135 | * authors use multiple MODULE_AUTHOR() statements/lines. | |
136 | */ | |
1da177e4 LT |
137 | #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) |
138 | ||
139 | /* What your module does. */ | |
140 | #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) | |
141 | ||
142 | /* One for each parameter, describing how to use it. Some files do | |
143 | multiple of these per line, so can't just use MODULE_INFO. */ | |
144 | #define MODULE_PARM_DESC(_parm, desc) \ | |
145 | __MODULE_INFO(parm, _parm, #_parm ":" desc) | |
146 | ||
147 | #define MODULE_DEVICE_TABLE(type,name) \ | |
148 | MODULE_GENERIC_TABLE(type##_device,name) | |
149 | ||
150 | /* Version of form [<epoch>:]<version>[-<extra-version>]. | |
151 | Or for CVS/RCS ID version, everything but the number is stripped. | |
152 | <epoch>: A (small) unsigned integer which allows you to start versions | |
153 | anew. If not mentioned, it's zero. eg. "2:1.0" is after | |
154 | "1:2.0". | |
155 | <version>: The <version> may contain only alphanumerics and the | |
156 | character `.'. Ordered by numeric sort for numeric parts, | |
157 | ascii sort for ascii parts (as per RPM or DEB algorithm). | |
158 | <extraversion>: Like <version>, but inserted for local | |
159 | customizations, eg "rh3" or "rusty1". | |
160 | ||
161 | Using this automatically adds a checksum of the .c files and the | |
162 | local headers in "srcversion". | |
163 | */ | |
164 | #define MODULE_VERSION(_version) MODULE_INFO(version, _version) | |
165 | ||
187afbed JM |
166 | /* Optional firmware file (or files) needed by the module |
167 | * format is simply firmware file name. Multiple firmware | |
168 | * files require multiple MODULE_FIRMWARE() specifiers */ | |
169 | #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) | |
170 | ||
1da177e4 LT |
171 | /* Given an address, look for it in the exception tables */ |
172 | const struct exception_table_entry *search_exception_tables(unsigned long add); | |
173 | ||
174 | struct notifier_block; | |
175 | ||
176 | #ifdef CONFIG_MODULES | |
177 | ||
5ed10910 | 178 | extern int modules_disabled; /* for sysctl */ |
1da177e4 LT |
179 | /* Get/put a kernel symbol (calls must be symmetric) */ |
180 | void *__symbol_get(const char *symbol); | |
181 | void *__symbol_get_gpl(const char *symbol); | |
182 | #define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x))) | |
183 | ||
184 | #ifndef __GENKSYMS__ | |
185 | #ifdef CONFIG_MODVERSIONS | |
186 | /* Mark the CRC weak since genksyms apparently decides not to | |
187 | * generate a checksums for some symbols */ | |
188 | #define __CRC_SYMBOL(sym, sec) \ | |
189 | extern void *__crc_##sym __attribute__((weak)); \ | |
190 | static const unsigned long __kcrctab_##sym \ | |
3ff6eecc | 191 | __used \ |
1da177e4 LT |
192 | __attribute__((section("__kcrctab" sec), unused)) \ |
193 | = (unsigned long) &__crc_##sym; | |
194 | #else | |
195 | #define __CRC_SYMBOL(sym, sec) | |
196 | #endif | |
197 | ||
198 | /* For every exported symbol, place a struct in the __ksymtab section */ | |
199 | #define __EXPORT_SYMBOL(sym, sec) \ | |
a1a8feed | 200 | extern typeof(sym) sym; \ |
1da177e4 LT |
201 | __CRC_SYMBOL(sym, sec) \ |
202 | static const char __kstrtab_##sym[] \ | |
ea01e798 | 203 | __attribute__((section("__ksymtab_strings"), aligned(1))) \ |
1da177e4 LT |
204 | = MODULE_SYMBOL_PREFIX #sym; \ |
205 | static const struct kernel_symbol __ksymtab_##sym \ | |
3ff6eecc | 206 | __used \ |
1da177e4 LT |
207 | __attribute__((section("__ksymtab" sec), unused)) \ |
208 | = { (unsigned long)&sym, __kstrtab_##sym } | |
209 | ||
210 | #define EXPORT_SYMBOL(sym) \ | |
211 | __EXPORT_SYMBOL(sym, "") | |
212 | ||
213 | #define EXPORT_SYMBOL_GPL(sym) \ | |
214 | __EXPORT_SYMBOL(sym, "_gpl") | |
215 | ||
9f28bb7e GKH |
216 | #define EXPORT_SYMBOL_GPL_FUTURE(sym) \ |
217 | __EXPORT_SYMBOL(sym, "_gpl_future") | |
218 | ||
f71d20e9 AV |
219 | |
220 | #ifdef CONFIG_UNUSED_SYMBOLS | |
221 | #define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused") | |
222 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl") | |
223 | #else | |
224 | #define EXPORT_UNUSED_SYMBOL(sym) | |
225 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) | |
226 | #endif | |
227 | ||
1da177e4 LT |
228 | #endif |
229 | ||
1da177e4 LT |
230 | enum module_state |
231 | { | |
232 | MODULE_STATE_LIVE, | |
233 | MODULE_STATE_COMING, | |
234 | MODULE_STATE_GOING, | |
235 | }; | |
236 | ||
1da177e4 LT |
237 | struct module |
238 | { | |
239 | enum module_state state; | |
240 | ||
241 | /* Member of list of modules */ | |
242 | struct list_head list; | |
243 | ||
244 | /* Unique handle for this module */ | |
245 | char name[MODULE_NAME_LEN]; | |
246 | ||
247 | /* Sysfs stuff. */ | |
248 | struct module_kobject mkobj; | |
03e88ae1 | 249 | struct module_attribute *modinfo_attrs; |
c988d2b2 MD |
250 | const char *version; |
251 | const char *srcversion; | |
270a6c4c | 252 | struct kobject *holders_dir; |
1da177e4 LT |
253 | |
254 | /* Exported symbols */ | |
255 | const struct kernel_symbol *syms; | |
1da177e4 | 256 | const unsigned long *crcs; |
af540689 | 257 | unsigned int num_syms; |
1da177e4 | 258 | |
e180a6b7 RR |
259 | /* Kernel parameters. */ |
260 | struct kernel_param *kp; | |
261 | unsigned int num_kp; | |
262 | ||
1da177e4 | 263 | /* GPL-only exported symbols. */ |
1da177e4 | 264 | unsigned int num_gpl_syms; |
af540689 | 265 | const struct kernel_symbol *gpl_syms; |
1da177e4 LT |
266 | const unsigned long *gpl_crcs; |
267 | ||
f7f5b675 | 268 | #ifdef CONFIG_UNUSED_SYMBOLS |
f71d20e9 AV |
269 | /* unused exported symbols. */ |
270 | const struct kernel_symbol *unused_syms; | |
f71d20e9 | 271 | const unsigned long *unused_crcs; |
af540689 RK |
272 | unsigned int num_unused_syms; |
273 | ||
f71d20e9 | 274 | /* GPL-only, unused exported symbols. */ |
f71d20e9 | 275 | unsigned int num_unused_gpl_syms; |
af540689 | 276 | const struct kernel_symbol *unused_gpl_syms; |
f71d20e9 | 277 | const unsigned long *unused_gpl_crcs; |
f7f5b675 | 278 | #endif |
f71d20e9 | 279 | |
9f28bb7e GKH |
280 | /* symbols that will be GPL-only in the near future. */ |
281 | const struct kernel_symbol *gpl_future_syms; | |
9f28bb7e | 282 | const unsigned long *gpl_future_crcs; |
af540689 | 283 | unsigned int num_gpl_future_syms; |
9f28bb7e | 284 | |
1da177e4 LT |
285 | /* Exception table */ |
286 | unsigned int num_exentries; | |
5e458cc0 | 287 | struct exception_table_entry *extable; |
1da177e4 LT |
288 | |
289 | /* Startup function. */ | |
290 | int (*init)(void); | |
291 | ||
292 | /* If this is non-NULL, vfree after init() returns */ | |
293 | void *module_init; | |
294 | ||
295 | /* Here is the actual code + data, vfree'd on unload. */ | |
296 | void *module_core; | |
297 | ||
298 | /* Here are the sizes of the init and core sections */ | |
2f0f2a33 | 299 | unsigned int init_size, core_size; |
1da177e4 LT |
300 | |
301 | /* The size of the executable code in each section. */ | |
2f0f2a33 | 302 | unsigned int init_text_size, core_text_size; |
1da177e4 LT |
303 | |
304 | /* Arch-specific module values */ | |
305 | struct mod_arch_specific arch; | |
306 | ||
2bc2d61a RD |
307 | unsigned int taints; /* same bits as kernel:tainted */ |
308 | ||
7664c5a1 JF |
309 | #ifdef CONFIG_GENERIC_BUG |
310 | /* Support for BUG */ | |
af540689 | 311 | unsigned num_bugs; |
7664c5a1 JF |
312 | struct list_head bug_list; |
313 | struct bug_entry *bug_table; | |
1da177e4 LT |
314 | #endif |
315 | ||
316 | #ifdef CONFIG_KALLSYMS | |
4a496226 JB |
317 | /* |
318 | * We keep the symbol and string tables for kallsyms. | |
319 | * The core_* fields below are temporary, loader-only (they | |
320 | * could really be discarded after module init). | |
321 | */ | |
322 | Elf_Sym *symtab, *core_symtab; | |
323 | unsigned int num_symtab, core_num_syms; | |
554bdfe5 | 324 | char *strtab, *core_strtab; |
1da177e4 LT |
325 | |
326 | /* Section attributes */ | |
327 | struct module_sect_attrs *sect_attrs; | |
6d760133 RM |
328 | |
329 | /* Notes attributes */ | |
330 | struct module_notes_attrs *notes_attrs; | |
1da177e4 LT |
331 | #endif |
332 | ||
333 | /* Per-cpu data. */ | |
334 | void *percpu; | |
335 | ||
336 | /* The command line arguments (may be mangled). People like | |
337 | keeping pointers to this stuff */ | |
338 | char *args; | |
97e1c18e MD |
339 | #ifdef CONFIG_TRACEPOINTS |
340 | struct tracepoint *tracepoints; | |
341 | unsigned int num_tracepoints; | |
342 | #endif | |
af540689 | 343 | |
769b0441 | 344 | #ifdef CONFIG_TRACING |
1ba28e02 LJ |
345 | const char **trace_bprintk_fmt_start; |
346 | unsigned int num_trace_bprintk_fmt; | |
347 | #endif | |
6d723736 SR |
348 | #ifdef CONFIG_EVENT_TRACING |
349 | struct ftrace_event_call *trace_events; | |
350 | unsigned int num_trace_events; | |
351 | #endif | |
93eb677d SR |
352 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
353 | unsigned long *ftrace_callsites; | |
354 | unsigned int num_ftrace_callsites; | |
355 | #endif | |
1ba28e02 | 356 | |
af540689 RK |
357 | #ifdef CONFIG_MODULE_UNLOAD |
358 | /* What modules depend on me? */ | |
359 | struct list_head modules_which_use_me; | |
360 | ||
361 | /* Who is waiting for us to be unloaded */ | |
362 | struct task_struct *waiter; | |
363 | ||
364 | /* Destruction function. */ | |
365 | void (*exit)(void); | |
366 | ||
e1783a24 CL |
367 | struct module_ref { |
368 | int count; | |
43cf38eb | 369 | } __percpu *refptr; |
af540689 | 370 | #endif |
b99b87f7 PO |
371 | |
372 | #ifdef CONFIG_CONSTRUCTORS | |
373 | /* Constructor functions. */ | |
374 | ctor_fn_t *ctors; | |
375 | unsigned int num_ctors; | |
376 | #endif | |
1da177e4 | 377 | }; |
e61a1c1c RZ |
378 | #ifndef MODULE_ARCH_INIT |
379 | #define MODULE_ARCH_INIT {} | |
380 | #endif | |
1da177e4 | 381 | |
c6b37801 TA |
382 | extern struct mutex module_mutex; |
383 | ||
1da177e4 LT |
384 | /* FIXME: It'd be nice to isolate modules during init, too, so they |
385 | aren't used before they (may) fail. But presently too much code | |
386 | (IDE & SCSI) require entry into the module during init.*/ | |
387 | static inline int module_is_live(struct module *mod) | |
388 | { | |
389 | return mod->state != MODULE_STATE_GOING; | |
390 | } | |
391 | ||
1da177e4 | 392 | struct module *__module_text_address(unsigned long addr); |
e610499e RR |
393 | struct module *__module_address(unsigned long addr); |
394 | bool is_module_address(unsigned long addr); | |
395 | bool is_module_text_address(unsigned long addr); | |
1da177e4 | 396 | |
a06f6211 MH |
397 | static inline int within_module_core(unsigned long addr, struct module *mod) |
398 | { | |
399 | return (unsigned long)mod->module_core <= addr && | |
400 | addr < (unsigned long)mod->module_core + mod->core_size; | |
401 | } | |
402 | ||
403 | static inline int within_module_init(unsigned long addr, struct module *mod) | |
404 | { | |
405 | return (unsigned long)mod->module_init <= addr && | |
406 | addr < (unsigned long)mod->module_init + mod->init_size; | |
407 | } | |
408 | ||
c6b37801 TA |
409 | /* Search for module by name: must hold module_mutex. */ |
410 | struct module *find_module(const char *name); | |
411 | ||
412 | struct symsearch { | |
413 | const struct kernel_symbol *start, *stop; | |
414 | const unsigned long *crcs; | |
415 | enum { | |
416 | NOT_GPL_ONLY, | |
417 | GPL_ONLY, | |
418 | WILL_BE_GPL_ONLY, | |
419 | } licence; | |
420 | bool unused; | |
421 | }; | |
422 | ||
423 | /* Search for an exported symbol by name. */ | |
424 | const struct kernel_symbol *find_symbol(const char *name, | |
425 | struct module **owner, | |
426 | const unsigned long **crc, | |
427 | bool gplok, | |
428 | bool warn); | |
429 | ||
430 | /* Walk the exported symbol table */ | |
431 | bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner, | |
432 | unsigned int symnum, void *data), void *data); | |
433 | ||
ea07890a | 434 | /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if |
1da177e4 | 435 | symnum out of range. */ |
ea07890a AD |
436 | int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, |
437 | char *name, char *module_name, int *exported); | |
1da177e4 LT |
438 | |
439 | /* Look for this name: can be of form module:name. */ | |
440 | unsigned long module_kallsyms_lookup_name(const char *name); | |
441 | ||
75a66614 AK |
442 | int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
443 | struct module *, unsigned long), | |
444 | void *data); | |
445 | ||
1da177e4 LT |
446 | extern void __module_put_and_exit(struct module *mod, long code) |
447 | __attribute__((noreturn)); | |
448 | #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code); | |
449 | ||
450 | #ifdef CONFIG_MODULE_UNLOAD | |
451 | unsigned int module_refcount(struct module *mod); | |
452 | void __symbol_put(const char *symbol); | |
453 | #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x) | |
454 | void symbol_put_addr(void *addr); | |
455 | ||
456 | /* Sometimes we know we already have a refcount, and it's easier not | |
457 | to handle the error case (which only happens with rmmod --wait). */ | |
458 | static inline void __module_get(struct module *module) | |
459 | { | |
460 | if (module) { | |
e1783a24 CL |
461 | preempt_disable(); |
462 | __this_cpu_inc(module->refptr->count); | |
7ead8b83 | 463 | trace_module_get(module, _THIS_IP_, |
e1783a24 CL |
464 | __this_cpu_read(module->refptr->count)); |
465 | preempt_enable(); | |
1da177e4 LT |
466 | } |
467 | } | |
468 | ||
469 | static inline int try_module_get(struct module *module) | |
470 | { | |
471 | int ret = 1; | |
472 | ||
473 | if (module) { | |
e1783a24 CL |
474 | preempt_disable(); |
475 | ||
7ead8b83 | 476 | if (likely(module_is_live(module))) { |
e1783a24 | 477 | __this_cpu_inc(module->refptr->count); |
7ead8b83 | 478 | trace_module_get(module, _THIS_IP_, |
e1783a24 | 479 | __this_cpu_read(module->refptr->count)); |
7ead8b83 | 480 | } |
1da177e4 LT |
481 | else |
482 | ret = 0; | |
e1783a24 CL |
483 | |
484 | preempt_enable(); | |
1da177e4 LT |
485 | } |
486 | return ret; | |
487 | } | |
488 | ||
f6a57033 | 489 | extern void module_put(struct module *module); |
1da177e4 LT |
490 | |
491 | #else /*!CONFIG_MODULE_UNLOAD*/ | |
492 | static inline int try_module_get(struct module *module) | |
493 | { | |
494 | return !module || module_is_live(module); | |
495 | } | |
496 | static inline void module_put(struct module *module) | |
497 | { | |
498 | } | |
499 | static inline void __module_get(struct module *module) | |
500 | { | |
501 | } | |
502 | #define symbol_put(x) do { } while(0) | |
503 | #define symbol_put_addr(p) do { } while(0) | |
504 | ||
505 | #endif /* CONFIG_MODULE_UNLOAD */ | |
c6b37801 | 506 | int use_module(struct module *a, struct module *b); |
1da177e4 LT |
507 | |
508 | /* This is a #define so the string doesn't get put in every .o file */ | |
509 | #define module_name(mod) \ | |
510 | ({ \ | |
511 | struct module *__mod = (mod); \ | |
512 | __mod ? __mod->name : "kernel"; \ | |
513 | }) | |
514 | ||
6dd06c9f RR |
515 | /* For kallsyms to ask for address resolution. namebuf should be at |
516 | * least KSYM_NAME_LEN long: a pointer to namebuf is returned if | |
517 | * found, otherwise NULL. */ | |
92dfc9dc | 518 | const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
519 | unsigned long *symbolsize, |
520 | unsigned long *offset, | |
521 | char **modname, | |
522 | char *namebuf); | |
9d65cb4a | 523 | int lookup_module_symbol_name(unsigned long addr, char *symname); |
a5c43dae | 524 | int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); |
1da177e4 LT |
525 | |
526 | /* For extable.c to search modules' exception tables. */ | |
527 | const struct exception_table_entry *search_module_extables(unsigned long addr); | |
528 | ||
529 | int register_module_notifier(struct notifier_block * nb); | |
530 | int unregister_module_notifier(struct notifier_block * nb); | |
531 | ||
532 | extern void print_modules(void); | |
533 | ||
97e1c18e MD |
534 | extern void module_update_tracepoints(void); |
535 | extern int module_get_iter_tracepoints(struct tracepoint_iter *iter); | |
536 | ||
1da177e4 LT |
537 | #else /* !CONFIG_MODULES... */ |
538 | #define EXPORT_SYMBOL(sym) | |
539 | #define EXPORT_SYMBOL_GPL(sym) | |
9f28bb7e | 540 | #define EXPORT_SYMBOL_GPL_FUTURE(sym) |
f71d20e9 AV |
541 | #define EXPORT_UNUSED_SYMBOL(sym) |
542 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) | |
1da177e4 LT |
543 | |
544 | /* Given an address, look for it in the exception tables. */ | |
545 | static inline const struct exception_table_entry * | |
546 | search_module_extables(unsigned long addr) | |
547 | { | |
548 | return NULL; | |
549 | } | |
550 | ||
e610499e RR |
551 | static inline struct module *__module_address(unsigned long addr) |
552 | { | |
553 | return NULL; | |
554 | } | |
555 | ||
1da177e4 LT |
556 | static inline struct module *__module_text_address(unsigned long addr) |
557 | { | |
558 | return NULL; | |
559 | } | |
560 | ||
e610499e RR |
561 | static inline bool is_module_address(unsigned long addr) |
562 | { | |
563 | return false; | |
564 | } | |
565 | ||
566 | static inline bool is_module_text_address(unsigned long addr) | |
4d435f9d | 567 | { |
e610499e | 568 | return false; |
4d435f9d IM |
569 | } |
570 | ||
1da177e4 LT |
571 | /* Get/put a kernel symbol (calls should be symmetric) */ |
572 | #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); }) | |
573 | #define symbol_put(x) do { } while(0) | |
574 | #define symbol_put_addr(x) do { } while(0) | |
575 | ||
576 | static inline void __module_get(struct module *module) | |
577 | { | |
578 | } | |
579 | ||
580 | static inline int try_module_get(struct module *module) | |
581 | { | |
582 | return 1; | |
583 | } | |
584 | ||
585 | static inline void module_put(struct module *module) | |
586 | { | |
587 | } | |
588 | ||
589 | #define module_name(mod) "kernel" | |
590 | ||
1da177e4 | 591 | /* For kallsyms to ask for address resolution. NULL means not found. */ |
92dfc9dc | 592 | static inline const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
593 | unsigned long *symbolsize, |
594 | unsigned long *offset, | |
595 | char **modname, | |
596 | char *namebuf) | |
1da177e4 LT |
597 | { |
598 | return NULL; | |
599 | } | |
600 | ||
9d65cb4a AD |
601 | static inline int lookup_module_symbol_name(unsigned long addr, char *symname) |
602 | { | |
603 | return -ERANGE; | |
604 | } | |
605 | ||
a5c43dae AD |
606 | static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) |
607 | { | |
608 | return -ERANGE; | |
609 | } | |
610 | ||
ea07890a AD |
611 | static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, |
612 | char *type, char *name, | |
613 | char *module_name, int *exported) | |
1da177e4 | 614 | { |
ea07890a | 615 | return -ERANGE; |
1da177e4 LT |
616 | } |
617 | ||
618 | static inline unsigned long module_kallsyms_lookup_name(const char *name) | |
619 | { | |
620 | return 0; | |
621 | } | |
622 | ||
75a66614 AK |
623 | static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
624 | struct module *, | |
625 | unsigned long), | |
626 | void *data) | |
627 | { | |
628 | return 0; | |
629 | } | |
630 | ||
1da177e4 LT |
631 | static inline int register_module_notifier(struct notifier_block * nb) |
632 | { | |
633 | /* no events will happen anyway, so this can always succeed */ | |
634 | return 0; | |
635 | } | |
636 | ||
637 | static inline int unregister_module_notifier(struct notifier_block * nb) | |
638 | { | |
639 | return 0; | |
640 | } | |
641 | ||
642 | #define module_put_and_exit(code) do_exit(code) | |
643 | ||
644 | static inline void print_modules(void) | |
645 | { | |
646 | } | |
647 | ||
97e1c18e MD |
648 | static inline void module_update_tracepoints(void) |
649 | { | |
650 | } | |
651 | ||
652 | static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter) | |
653 | { | |
654 | return 0; | |
655 | } | |
656 | ||
ef665c1a RD |
657 | #endif /* CONFIG_MODULES */ |
658 | ||
1da177e4 | 659 | struct device_driver; |
ef665c1a | 660 | #ifdef CONFIG_SYSFS |
1da177e4 LT |
661 | struct module; |
662 | ||
7405c1e1 GKH |
663 | extern struct kset *module_kset; |
664 | extern struct kobj_type module_ktype; | |
665 | extern int module_sysfs_initialized; | |
ef665c1a RD |
666 | |
667 | int mod_sysfs_init(struct module *mod); | |
668 | int mod_sysfs_setup(struct module *mod, | |
669 | struct kernel_param *kparam, | |
670 | unsigned int num_params); | |
671 | int module_add_modinfo_attrs(struct module *mod); | |
672 | void module_remove_modinfo_attrs(struct module *mod); | |
673 | ||
674 | #else /* !CONFIG_SYSFS */ | |
675 | ||
676 | static inline int mod_sysfs_init(struct module *mod) | |
1da177e4 | 677 | { |
ef665c1a | 678 | return 0; |
1da177e4 LT |
679 | } |
680 | ||
ef665c1a RD |
681 | static inline int mod_sysfs_setup(struct module *mod, |
682 | struct kernel_param *kparam, | |
683 | unsigned int num_params) | |
1da177e4 | 684 | { |
ef665c1a | 685 | return 0; |
1da177e4 LT |
686 | } |
687 | ||
ef665c1a RD |
688 | static inline int module_add_modinfo_attrs(struct module *mod) |
689 | { | |
690 | return 0; | |
691 | } | |
692 | ||
693 | static inline void module_remove_modinfo_attrs(struct module *mod) | |
694 | { } | |
695 | ||
696 | #endif /* CONFIG_SYSFS */ | |
697 | ||
1da177e4 LT |
698 | #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) |
699 | ||
700 | /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ | |
701 | ||
1da177e4 LT |
702 | #define __MODULE_STRING(x) __stringify(x) |
703 | ||
0d9c25dd AM |
704 | |
705 | #ifdef CONFIG_GENERIC_BUG | |
706 | int module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, | |
707 | struct module *); | |
708 | void module_bug_cleanup(struct module *); | |
709 | ||
710 | #else /* !CONFIG_GENERIC_BUG */ | |
711 | ||
712 | static inline int module_bug_finalize(const Elf_Ehdr *hdr, | |
713 | const Elf_Shdr *sechdrs, | |
714 | struct module *mod) | |
715 | { | |
716 | return 0; | |
717 | } | |
718 | static inline void module_bug_cleanup(struct module *mod) {} | |
719 | #endif /* CONFIG_GENERIC_BUG */ | |
720 | ||
1da177e4 | 721 | #endif /* _LINUX_MODULE_H */ |