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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> |
f5016932 | 19 | #include <linux/export.h> |
1da177e4 | 20 | |
e1783a24 | 21 | #include <linux/percpu.h> |
1da177e4 LT |
22 | #include <asm/module.h> |
23 | ||
7ead8b83 LZ |
24 | #include <trace/events/module.h> |
25 | ||
1da177e4 LT |
26 | /* Not Yet Implemented */ |
27 | #define MODULE_SUPPORTED_DEVICE(name) | |
28 | ||
730b69d2 | 29 | #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN |
1da177e4 | 30 | |
1da177e4 LT |
31 | struct modversion_info |
32 | { | |
33 | unsigned long crc; | |
34 | char name[MODULE_NAME_LEN]; | |
35 | }; | |
36 | ||
37 | struct module; | |
38 | ||
4befb026 KS |
39 | struct module_kobject { |
40 | struct kobject kobj; | |
41 | struct module *mod; | |
42 | struct kobject *drivers_dir; | |
43 | struct module_param_attrs *mp; | |
44 | }; | |
45 | ||
1da177e4 | 46 | struct module_attribute { |
4befb026 KS |
47 | struct attribute attr; |
48 | ssize_t (*show)(struct module_attribute *, struct module_kobject *, | |
49 | char *); | |
50 | ssize_t (*store)(struct module_attribute *, struct module_kobject *, | |
1da177e4 | 51 | const char *, size_t count); |
c988d2b2 MD |
52 | void (*setup)(struct module *, const char *); |
53 | int (*test)(struct module *); | |
54 | void (*free)(struct module *); | |
1da177e4 LT |
55 | }; |
56 | ||
e94965ed DT |
57 | struct module_version_attribute { |
58 | struct module_attribute mattr; | |
59 | const char *module_name; | |
60 | const char *version; | |
98562ad8 | 61 | } __attribute__ ((__aligned__(sizeof(void *)))); |
e94965ed | 62 | |
9b73a584 | 63 | extern ssize_t __modver_version_show(struct module_attribute *, |
4befb026 | 64 | struct module_kobject *, char *); |
9b73a584 | 65 | |
88bfa324 | 66 | extern struct module_attribute module_uevent; |
1da177e4 LT |
67 | |
68 | /* These are either module local, or the kernel's dummy ones. */ | |
69 | extern int init_module(void); | |
70 | extern void cleanup_module(void); | |
71 | ||
72 | /* Archs provide a method of finding the correct exception table. */ | |
73 | struct exception_table_entry; | |
74 | ||
75 | const struct exception_table_entry * | |
76 | search_extable(const struct exception_table_entry *first, | |
77 | const struct exception_table_entry *last, | |
78 | unsigned long value); | |
79 | void sort_extable(struct exception_table_entry *start, | |
80 | struct exception_table_entry *finish); | |
81 | void sort_main_extable(void); | |
ad6561df | 82 | void trim_init_extable(struct module *m); |
1da177e4 | 83 | |
1da177e4 LT |
84 | #ifdef MODULE |
85 | #define MODULE_GENERIC_TABLE(gtype,name) \ | |
86 | extern const struct gtype##_id __mod_##gtype##_table \ | |
87 | __attribute__ ((unused, alias(__stringify(name)))) | |
88 | ||
1da177e4 LT |
89 | #else /* !MODULE */ |
90 | #define MODULE_GENERIC_TABLE(gtype,name) | |
1da177e4 LT |
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] | |
8d27e908 XVP |
108 | * "Dual MIT/GPL" [GNU Public License v2 |
109 | * or MIT license choice] | |
1da177e4 LT |
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 | ||
1d7015ca JB |
129 | /* |
130 | * Author(s), use "Name <email>" or just "Name", for multiple | |
131 | * authors use multiple MODULE_AUTHOR() statements/lines. | |
132 | */ | |
1da177e4 LT |
133 | #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) |
134 | ||
135 | /* What your module does. */ | |
136 | #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) | |
137 | ||
1da177e4 LT |
138 | #define MODULE_DEVICE_TABLE(type,name) \ |
139 | MODULE_GENERIC_TABLE(type##_device,name) | |
140 | ||
141 | /* Version of form [<epoch>:]<version>[-<extra-version>]. | |
142 | Or for CVS/RCS ID version, everything but the number is stripped. | |
143 | <epoch>: A (small) unsigned integer which allows you to start versions | |
144 | anew. If not mentioned, it's zero. eg. "2:1.0" is after | |
145 | "1:2.0". | |
146 | <version>: The <version> may contain only alphanumerics and the | |
147 | character `.'. Ordered by numeric sort for numeric parts, | |
148 | ascii sort for ascii parts (as per RPM or DEB algorithm). | |
149 | <extraversion>: Like <version>, but inserted for local | |
150 | customizations, eg "rh3" or "rusty1". | |
151 | ||
152 | Using this automatically adds a checksum of the .c files and the | |
153 | local headers in "srcversion". | |
154 | */ | |
e94965ed | 155 | |
3b90a5b2 | 156 | #if defined(MODULE) || !defined(CONFIG_SYSFS) |
1da177e4 | 157 | #define MODULE_VERSION(_version) MODULE_INFO(version, _version) |
e94965ed DT |
158 | #else |
159 | #define MODULE_VERSION(_version) \ | |
b4bc8428 | 160 | static struct module_version_attribute ___modver_attr = { \ |
e94965ed DT |
161 | .mattr = { \ |
162 | .attr = { \ | |
163 | .name = "version", \ | |
164 | .mode = S_IRUGO, \ | |
165 | }, \ | |
166 | .show = __modver_version_show, \ | |
167 | }, \ | |
168 | .module_name = KBUILD_MODNAME, \ | |
169 | .version = _version, \ | |
b4bc8428 DT |
170 | }; \ |
171 | static const struct module_version_attribute \ | |
172 | __used __attribute__ ((__section__ ("__modver"))) \ | |
173 | * __moduleparam_const __modver_attr = &___modver_attr | |
e94965ed | 174 | #endif |
1da177e4 | 175 | |
187afbed JM |
176 | /* Optional firmware file (or files) needed by the module |
177 | * format is simply firmware file name. Multiple firmware | |
178 | * files require multiple MODULE_FIRMWARE() specifiers */ | |
179 | #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) | |
180 | ||
1da177e4 LT |
181 | /* Given an address, look for it in the exception tables */ |
182 | const struct exception_table_entry *search_exception_tables(unsigned long add); | |
183 | ||
184 | struct notifier_block; | |
185 | ||
186 | #ifdef CONFIG_MODULES | |
187 | ||
5ed10910 | 188 | extern int modules_disabled; /* for sysctl */ |
1da177e4 LT |
189 | /* Get/put a kernel symbol (calls must be symmetric) */ |
190 | void *__symbol_get(const char *symbol); | |
191 | void *__symbol_get_gpl(const char *symbol); | |
192 | #define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x))) | |
193 | ||
c8e21ced RR |
194 | /* modules using other modules: kdb wants to see this. */ |
195 | struct module_use { | |
196 | struct list_head source_list; | |
197 | struct list_head target_list; | |
198 | struct module *source, *target; | |
199 | }; | |
200 | ||
1da177e4 LT |
201 | enum module_state |
202 | { | |
203 | MODULE_STATE_LIVE, | |
204 | MODULE_STATE_COMING, | |
205 | MODULE_STATE_GOING, | |
206 | }; | |
207 | ||
bd77c047 ED |
208 | /** |
209 | * struct module_ref - per cpu module reference counts | |
210 | * @incs: number of module get on this cpu | |
211 | * @decs: number of module put on this cpu | |
212 | * | |
213 | * We force an alignment on 8 or 16 bytes, so that alloc_percpu() | |
214 | * put @incs/@decs in same cache line, with no extra memory cost, | |
215 | * since alloc_percpu() is fine grained. | |
216 | */ | |
217 | struct module_ref { | |
218 | unsigned long incs; | |
219 | unsigned long decs; | |
220 | } __attribute((aligned(2 * sizeof(unsigned long)))); | |
221 | ||
1da177e4 LT |
222 | struct module |
223 | { | |
224 | enum module_state state; | |
225 | ||
226 | /* Member of list of modules */ | |
227 | struct list_head list; | |
228 | ||
229 | /* Unique handle for this module */ | |
230 | char name[MODULE_NAME_LEN]; | |
231 | ||
232 | /* Sysfs stuff. */ | |
233 | struct module_kobject mkobj; | |
03e88ae1 | 234 | struct module_attribute *modinfo_attrs; |
c988d2b2 MD |
235 | const char *version; |
236 | const char *srcversion; | |
270a6c4c | 237 | struct kobject *holders_dir; |
1da177e4 LT |
238 | |
239 | /* Exported symbols */ | |
240 | const struct kernel_symbol *syms; | |
1da177e4 | 241 | const unsigned long *crcs; |
af540689 | 242 | unsigned int num_syms; |
1da177e4 | 243 | |
e180a6b7 RR |
244 | /* Kernel parameters. */ |
245 | struct kernel_param *kp; | |
246 | unsigned int num_kp; | |
247 | ||
1da177e4 | 248 | /* GPL-only exported symbols. */ |
1da177e4 | 249 | unsigned int num_gpl_syms; |
af540689 | 250 | const struct kernel_symbol *gpl_syms; |
1da177e4 LT |
251 | const unsigned long *gpl_crcs; |
252 | ||
f7f5b675 | 253 | #ifdef CONFIG_UNUSED_SYMBOLS |
f71d20e9 AV |
254 | /* unused exported symbols. */ |
255 | const struct kernel_symbol *unused_syms; | |
f71d20e9 | 256 | const unsigned long *unused_crcs; |
af540689 RK |
257 | unsigned int num_unused_syms; |
258 | ||
f71d20e9 | 259 | /* GPL-only, unused exported symbols. */ |
f71d20e9 | 260 | unsigned int num_unused_gpl_syms; |
af540689 | 261 | const struct kernel_symbol *unused_gpl_syms; |
f71d20e9 | 262 | const unsigned long *unused_gpl_crcs; |
f7f5b675 | 263 | #endif |
f71d20e9 | 264 | |
9f28bb7e GKH |
265 | /* symbols that will be GPL-only in the near future. */ |
266 | const struct kernel_symbol *gpl_future_syms; | |
9f28bb7e | 267 | const unsigned long *gpl_future_crcs; |
af540689 | 268 | unsigned int num_gpl_future_syms; |
9f28bb7e | 269 | |
1da177e4 LT |
270 | /* Exception table */ |
271 | unsigned int num_exentries; | |
5e458cc0 | 272 | struct exception_table_entry *extable; |
1da177e4 LT |
273 | |
274 | /* Startup function. */ | |
275 | int (*init)(void); | |
276 | ||
277 | /* If this is non-NULL, vfree after init() returns */ | |
278 | void *module_init; | |
279 | ||
280 | /* Here is the actual code + data, vfree'd on unload. */ | |
281 | void *module_core; | |
282 | ||
283 | /* Here are the sizes of the init and core sections */ | |
2f0f2a33 | 284 | unsigned int init_size, core_size; |
1da177e4 LT |
285 | |
286 | /* The size of the executable code in each section. */ | |
2f0f2a33 | 287 | unsigned int init_text_size, core_text_size; |
1da177e4 | 288 | |
84e1c6bb MC |
289 | /* Size of RO sections of the module (text+rodata) */ |
290 | unsigned int init_ro_size, core_ro_size; | |
291 | ||
1da177e4 LT |
292 | /* Arch-specific module values */ |
293 | struct mod_arch_specific arch; | |
294 | ||
2bc2d61a RD |
295 | unsigned int taints; /* same bits as kernel:tainted */ |
296 | ||
7664c5a1 JF |
297 | #ifdef CONFIG_GENERIC_BUG |
298 | /* Support for BUG */ | |
af540689 | 299 | unsigned num_bugs; |
7664c5a1 JF |
300 | struct list_head bug_list; |
301 | struct bug_entry *bug_table; | |
1da177e4 LT |
302 | #endif |
303 | ||
304 | #ifdef CONFIG_KALLSYMS | |
4a496226 JB |
305 | /* |
306 | * We keep the symbol and string tables for kallsyms. | |
307 | * The core_* fields below are temporary, loader-only (they | |
308 | * could really be discarded after module init). | |
309 | */ | |
310 | Elf_Sym *symtab, *core_symtab; | |
311 | unsigned int num_symtab, core_num_syms; | |
554bdfe5 | 312 | char *strtab, *core_strtab; |
1da177e4 LT |
313 | |
314 | /* Section attributes */ | |
315 | struct module_sect_attrs *sect_attrs; | |
6d760133 RM |
316 | |
317 | /* Notes attributes */ | |
318 | struct module_notes_attrs *notes_attrs; | |
1da177e4 LT |
319 | #endif |
320 | ||
a288bd65 RK |
321 | /* The command line arguments (may be mangled). People like |
322 | keeping pointers to this stuff */ | |
323 | char *args; | |
324 | ||
259354de | 325 | #ifdef CONFIG_SMP |
1da177e4 | 326 | /* Per-cpu data. */ |
259354de TH |
327 | void __percpu *percpu; |
328 | unsigned int percpu_size; | |
329 | #endif | |
1da177e4 | 330 | |
97e1c18e | 331 | #ifdef CONFIG_TRACEPOINTS |
97e1c18e | 332 | unsigned int num_tracepoints; |
a288bd65 | 333 | struct tracepoint * const *tracepoints_ptrs; |
97e1c18e | 334 | #endif |
bf5438fc JB |
335 | #ifdef HAVE_JUMP_LABEL |
336 | struct jump_entry *jump_entries; | |
337 | unsigned int num_jump_entries; | |
338 | #endif | |
769b0441 | 339 | #ifdef CONFIG_TRACING |
1ba28e02 | 340 | unsigned int num_trace_bprintk_fmt; |
a288bd65 | 341 | const char **trace_bprintk_fmt_start; |
1ba28e02 | 342 | #endif |
6d723736 | 343 | #ifdef CONFIG_EVENT_TRACING |
e4a9ea5e | 344 | struct ftrace_event_call **trace_events; |
6d723736 SR |
345 | unsigned int num_trace_events; |
346 | #endif | |
93eb677d | 347 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
93eb677d | 348 | unsigned int num_ftrace_callsites; |
a288bd65 | 349 | unsigned long *ftrace_callsites; |
93eb677d | 350 | #endif |
1ba28e02 | 351 | |
af540689 RK |
352 | #ifdef CONFIG_MODULE_UNLOAD |
353 | /* What modules depend on me? */ | |
2c02dfe7 LT |
354 | struct list_head source_list; |
355 | /* What modules do I depend on? */ | |
356 | struct list_head target_list; | |
af540689 RK |
357 | |
358 | /* Who is waiting for us to be unloaded */ | |
359 | struct task_struct *waiter; | |
360 | ||
361 | /* Destruction function. */ | |
362 | void (*exit)(void); | |
363 | ||
bd77c047 | 364 | struct module_ref __percpu *refptr; |
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); | |
10fad5e4 | 390 | bool is_module_percpu_address(unsigned long addr); |
e610499e | 391 | bool is_module_text_address(unsigned long addr); |
1da177e4 | 392 | |
a06f6211 MH |
393 | static inline int within_module_core(unsigned long addr, struct module *mod) |
394 | { | |
395 | return (unsigned long)mod->module_core <= addr && | |
396 | addr < (unsigned long)mod->module_core + mod->core_size; | |
397 | } | |
398 | ||
399 | static inline int within_module_init(unsigned long addr, struct module *mod) | |
400 | { | |
401 | return (unsigned long)mod->module_init <= addr && | |
402 | addr < (unsigned long)mod->module_init + mod->init_size; | |
403 | } | |
404 | ||
c6b37801 TA |
405 | /* Search for module by name: must hold module_mutex. */ |
406 | struct module *find_module(const char *name); | |
407 | ||
408 | struct symsearch { | |
409 | const struct kernel_symbol *start, *stop; | |
410 | const unsigned long *crcs; | |
411 | enum { | |
412 | NOT_GPL_ONLY, | |
413 | GPL_ONLY, | |
414 | WILL_BE_GPL_ONLY, | |
415 | } licence; | |
416 | bool unused; | |
417 | }; | |
418 | ||
419 | /* Search for an exported symbol by name. */ | |
420 | const struct kernel_symbol *find_symbol(const char *name, | |
421 | struct module **owner, | |
422 | const unsigned long **crc, | |
423 | bool gplok, | |
424 | bool warn); | |
425 | ||
426 | /* Walk the exported symbol table */ | |
de4d8d53 RR |
427 | bool each_symbol_section(bool (*fn)(const struct symsearch *arr, |
428 | struct module *owner, | |
429 | void *data), void *data); | |
c6b37801 | 430 | |
ea07890a | 431 | /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if |
1da177e4 | 432 | symnum out of range. */ |
ea07890a AD |
433 | int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, |
434 | char *name, char *module_name, int *exported); | |
1da177e4 LT |
435 | |
436 | /* Look for this name: can be of form module:name. */ | |
437 | unsigned long module_kallsyms_lookup_name(const char *name); | |
438 | ||
75a66614 AK |
439 | int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
440 | struct module *, unsigned long), | |
441 | void *data); | |
442 | ||
1da177e4 LT |
443 | extern void __module_put_and_exit(struct module *mod, long code) |
444 | __attribute__((noreturn)); | |
445 | #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code); | |
446 | ||
447 | #ifdef CONFIG_MODULE_UNLOAD | |
bd77c047 | 448 | unsigned long module_refcount(struct module *mod); |
1da177e4 LT |
449 | void __symbol_put(const char *symbol); |
450 | #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x) | |
451 | void symbol_put_addr(void *addr); | |
452 | ||
453 | /* Sometimes we know we already have a refcount, and it's easier not | |
454 | to handle the error case (which only happens with rmmod --wait). */ | |
455 | static inline void __module_get(struct module *module) | |
456 | { | |
457 | if (module) { | |
e1783a24 | 458 | preempt_disable(); |
5fbfb18d | 459 | __this_cpu_inc(module->refptr->incs); |
ae832d1e | 460 | trace_module_get(module, _THIS_IP_); |
e1783a24 | 461 | preempt_enable(); |
1da177e4 LT |
462 | } |
463 | } | |
464 | ||
465 | static inline int try_module_get(struct module *module) | |
466 | { | |
467 | int ret = 1; | |
468 | ||
469 | if (module) { | |
e1783a24 CL |
470 | preempt_disable(); |
471 | ||
7ead8b83 | 472 | if (likely(module_is_live(module))) { |
5fbfb18d | 473 | __this_cpu_inc(module->refptr->incs); |
ae832d1e | 474 | trace_module_get(module, _THIS_IP_); |
5fbfb18d | 475 | } else |
1da177e4 | 476 | ret = 0; |
e1783a24 CL |
477 | |
478 | preempt_enable(); | |
1da177e4 LT |
479 | } |
480 | return ret; | |
481 | } | |
482 | ||
f6a57033 | 483 | extern void module_put(struct module *module); |
1da177e4 LT |
484 | |
485 | #else /*!CONFIG_MODULE_UNLOAD*/ | |
486 | static inline int try_module_get(struct module *module) | |
487 | { | |
488 | return !module || module_is_live(module); | |
489 | } | |
490 | static inline void module_put(struct module *module) | |
491 | { | |
492 | } | |
493 | static inline void __module_get(struct module *module) | |
494 | { | |
495 | } | |
496 | #define symbol_put(x) do { } while(0) | |
497 | #define symbol_put_addr(p) do { } while(0) | |
498 | ||
499 | #endif /* CONFIG_MODULE_UNLOAD */ | |
dfd62d1d | 500 | int ref_module(struct module *a, struct module *b); |
1da177e4 LT |
501 | |
502 | /* This is a #define so the string doesn't get put in every .o file */ | |
503 | #define module_name(mod) \ | |
504 | ({ \ | |
505 | struct module *__mod = (mod); \ | |
506 | __mod ? __mod->name : "kernel"; \ | |
507 | }) | |
508 | ||
6dd06c9f RR |
509 | /* For kallsyms to ask for address resolution. namebuf should be at |
510 | * least KSYM_NAME_LEN long: a pointer to namebuf is returned if | |
511 | * found, otherwise NULL. */ | |
92dfc9dc | 512 | const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
513 | unsigned long *symbolsize, |
514 | unsigned long *offset, | |
515 | char **modname, | |
516 | char *namebuf); | |
9d65cb4a | 517 | int lookup_module_symbol_name(unsigned long addr, char *symname); |
a5c43dae | 518 | int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); |
1da177e4 LT |
519 | |
520 | /* For extable.c to search modules' exception tables. */ | |
521 | const struct exception_table_entry *search_module_extables(unsigned long addr); | |
522 | ||
523 | int register_module_notifier(struct notifier_block * nb); | |
524 | int unregister_module_notifier(struct notifier_block * nb); | |
525 | ||
526 | extern void print_modules(void); | |
527 | ||
1da177e4 | 528 | #else /* !CONFIG_MODULES... */ |
1da177e4 LT |
529 | |
530 | /* Given an address, look for it in the exception tables. */ | |
531 | static inline const struct exception_table_entry * | |
532 | search_module_extables(unsigned long addr) | |
533 | { | |
534 | return NULL; | |
535 | } | |
536 | ||
e610499e RR |
537 | static inline struct module *__module_address(unsigned long addr) |
538 | { | |
539 | return NULL; | |
540 | } | |
541 | ||
1da177e4 LT |
542 | static inline struct module *__module_text_address(unsigned long addr) |
543 | { | |
544 | return NULL; | |
545 | } | |
546 | ||
e610499e RR |
547 | static inline bool is_module_address(unsigned long addr) |
548 | { | |
549 | return false; | |
550 | } | |
551 | ||
d5e50daf RD |
552 | static inline bool is_module_percpu_address(unsigned long addr) |
553 | { | |
554 | return false; | |
555 | } | |
556 | ||
e610499e | 557 | static inline bool is_module_text_address(unsigned long addr) |
4d435f9d | 558 | { |
e610499e | 559 | return false; |
4d435f9d IM |
560 | } |
561 | ||
1da177e4 LT |
562 | /* Get/put a kernel symbol (calls should be symmetric) */ |
563 | #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); }) | |
564 | #define symbol_put(x) do { } while(0) | |
565 | #define symbol_put_addr(x) do { } while(0) | |
566 | ||
567 | static inline void __module_get(struct module *module) | |
568 | { | |
569 | } | |
570 | ||
571 | static inline int try_module_get(struct module *module) | |
572 | { | |
573 | return 1; | |
574 | } | |
575 | ||
576 | static inline void module_put(struct module *module) | |
577 | { | |
578 | } | |
579 | ||
580 | #define module_name(mod) "kernel" | |
581 | ||
1da177e4 | 582 | /* For kallsyms to ask for address resolution. NULL means not found. */ |
92dfc9dc | 583 | static inline const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
584 | unsigned long *symbolsize, |
585 | unsigned long *offset, | |
586 | char **modname, | |
587 | char *namebuf) | |
1da177e4 LT |
588 | { |
589 | return NULL; | |
590 | } | |
591 | ||
9d65cb4a AD |
592 | static inline int lookup_module_symbol_name(unsigned long addr, char *symname) |
593 | { | |
594 | return -ERANGE; | |
595 | } | |
596 | ||
a5c43dae AD |
597 | static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) |
598 | { | |
599 | return -ERANGE; | |
600 | } | |
601 | ||
ea07890a AD |
602 | static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, |
603 | char *type, char *name, | |
604 | char *module_name, int *exported) | |
1da177e4 | 605 | { |
ea07890a | 606 | return -ERANGE; |
1da177e4 LT |
607 | } |
608 | ||
609 | static inline unsigned long module_kallsyms_lookup_name(const char *name) | |
610 | { | |
611 | return 0; | |
612 | } | |
613 | ||
75a66614 AK |
614 | static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
615 | struct module *, | |
616 | unsigned long), | |
617 | void *data) | |
618 | { | |
619 | return 0; | |
620 | } | |
621 | ||
1da177e4 LT |
622 | static inline int register_module_notifier(struct notifier_block * nb) |
623 | { | |
624 | /* no events will happen anyway, so this can always succeed */ | |
625 | return 0; | |
626 | } | |
627 | ||
628 | static inline int unregister_module_notifier(struct notifier_block * nb) | |
629 | { | |
630 | return 0; | |
631 | } | |
632 | ||
633 | #define module_put_and_exit(code) do_exit(code) | |
634 | ||
635 | static inline void print_modules(void) | |
636 | { | |
637 | } | |
ef665c1a RD |
638 | #endif /* CONFIG_MODULES */ |
639 | ||
ef665c1a | 640 | #ifdef CONFIG_SYSFS |
7405c1e1 GKH |
641 | extern struct kset *module_kset; |
642 | extern struct kobj_type module_ktype; | |
643 | extern int module_sysfs_initialized; | |
ef665c1a RD |
644 | #endif /* CONFIG_SYSFS */ |
645 | ||
1da177e4 LT |
646 | #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) |
647 | ||
648 | /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ | |
649 | ||
1da177e4 LT |
650 | #define __MODULE_STRING(x) __stringify(x) |
651 | ||
84e1c6bb MC |
652 | #ifdef CONFIG_DEBUG_SET_MODULE_RONX |
653 | extern void set_all_modules_text_rw(void); | |
654 | extern void set_all_modules_text_ro(void); | |
655 | #else | |
656 | static inline void set_all_modules_text_rw(void) { } | |
657 | static inline void set_all_modules_text_ro(void) { } | |
658 | #endif | |
0d9c25dd AM |
659 | |
660 | #ifdef CONFIG_GENERIC_BUG | |
5336377d | 661 | void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, |
0d9c25dd AM |
662 | struct module *); |
663 | void module_bug_cleanup(struct module *); | |
664 | ||
665 | #else /* !CONFIG_GENERIC_BUG */ | |
666 | ||
5336377d | 667 | static inline void module_bug_finalize(const Elf_Ehdr *hdr, |
0d9c25dd AM |
668 | const Elf_Shdr *sechdrs, |
669 | struct module *mod) | |
670 | { | |
0d9c25dd AM |
671 | } |
672 | static inline void module_bug_cleanup(struct module *mod) {} | |
673 | #endif /* CONFIG_GENERIC_BUG */ | |
674 | ||
1da177e4 | 675 | #endif /* _LINUX_MODULE_H */ |