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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 | */ | |
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> | |
18 | #include <linux/tracepoint.h> | |
19 | ||
20 | #include <asm/local.h> | |
21 | #include <asm/module.h> | |
22 | ||
23 | #include <trace/events/module.h> | |
24 | ||
25 | /* Not Yet Implemented */ | |
26 | #define MODULE_SUPPORTED_DEVICE(name) | |
27 | ||
28 | /* some toolchains uses a `_' prefix for all user symbols */ | |
29 | #ifndef MODULE_SYMBOL_PREFIX | |
30 | #define MODULE_SYMBOL_PREFIX "" | |
31 | #endif | |
32 | ||
33 | #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN | |
34 | ||
35 | struct kernel_symbol | |
36 | { | |
37 | unsigned long value; | |
38 | const char *name; | |
39 | }; | |
40 | ||
41 | struct modversion_info | |
42 | { | |
43 | unsigned long crc; | |
44 | char name[MODULE_NAME_LEN]; | |
45 | }; | |
46 | ||
47 | struct module; | |
48 | ||
49 | struct module_attribute { | |
50 | struct attribute attr; | |
51 | ssize_t (*show)(struct module_attribute *, struct module *, char *); | |
52 | ssize_t (*store)(struct module_attribute *, struct module *, | |
53 | const char *, size_t count); | |
54 | void (*setup)(struct module *, const char *); | |
55 | int (*test)(struct module *); | |
56 | void (*free)(struct module *); | |
57 | }; | |
58 | ||
59 | struct module_kobject | |
60 | { | |
61 | struct kobject kobj; | |
62 | struct module *mod; | |
63 | struct kobject *drivers_dir; | |
64 | struct module_param_attrs *mp; | |
65 | }; | |
66 | ||
67 | /* These are either module local, or the kernel's dummy ones. */ | |
68 | extern int init_module(void); | |
69 | extern void cleanup_module(void); | |
70 | ||
71 | /* Archs provide a method of finding the correct exception table. */ | |
72 | struct exception_table_entry; | |
73 | ||
74 | const struct exception_table_entry * | |
75 | search_extable(const struct exception_table_entry *first, | |
76 | const struct exception_table_entry *last, | |
77 | unsigned long value); | |
78 | void sort_extable(struct exception_table_entry *start, | |
79 | struct exception_table_entry *finish); | |
80 | void sort_main_extable(void); | |
81 | void trim_init_extable(struct module *m); | |
82 | ||
83 | #ifdef MODULE | |
84 | #define MODULE_GENERIC_TABLE(gtype,name) \ | |
85 | extern const struct gtype##_id __mod_##gtype##_table \ | |
86 | __attribute__ ((unused, alias(__stringify(name)))) | |
87 | ||
88 | extern struct module __this_module; | |
89 | #define THIS_MODULE (&__this_module) | |
90 | #else /* !MODULE */ | |
91 | #define MODULE_GENERIC_TABLE(gtype,name) | |
92 | #define THIS_MODULE ((struct module *)0) | |
93 | #endif | |
94 | ||
95 | /* Generic info of form tag = "info" */ | |
96 | #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) | |
97 | ||
98 | /* For userspace: you can also call me... */ | |
99 | #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias) | |
100 | ||
101 | /* | |
102 | * The following license idents are currently accepted as indicating free | |
103 | * software modules | |
104 | * | |
105 | * "GPL" [GNU Public License v2 or later] | |
106 | * "GPL v2" [GNU Public License v2] | |
107 | * "GPL and additional rights" [GNU Public License v2 rights and more] | |
108 | * "Dual BSD/GPL" [GNU Public License v2 | |
109 | * or BSD license choice] | |
110 | * "Dual MIT/GPL" [GNU Public License v2 | |
111 | * or MIT license choice] | |
112 | * "Dual MPL/GPL" [GNU Public License v2 | |
113 | * or Mozilla license choice] | |
114 | * | |
115 | * The following other idents are available | |
116 | * | |
117 | * "Proprietary" [Non free products] | |
118 | * | |
119 | * There are dual licensed components, but when running with Linux it is the | |
120 | * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL | |
121 | * is a GPL combined work. | |
122 | * | |
123 | * This exists for several reasons | |
124 | * 1. So modinfo can show license info for users wanting to vet their setup | |
125 | * is free | |
126 | * 2. So the community can ignore bug reports including proprietary modules | |
127 | * 3. So vendors can do likewise based on their own policies | |
128 | */ | |
129 | #define MODULE_LICENSE(_license) MODULE_INFO(license, _license) | |
130 | ||
131 | /* Author, ideally of form NAME[, NAME]*[ and NAME] */ | |
132 | #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) | |
133 | ||
134 | /* What your module does. */ | |
135 | #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) | |
136 | ||
137 | /* One for each parameter, describing how to use it. Some files do | |
138 | multiple of these per line, so can't just use MODULE_INFO. */ | |
139 | #define MODULE_PARM_DESC(_parm, desc) \ | |
140 | __MODULE_INFO(parm, _parm, #_parm ":" desc) | |
141 | ||
142 | #define MODULE_DEVICE_TABLE(type,name) \ | |
143 | MODULE_GENERIC_TABLE(type##_device,name) | |
144 | ||
145 | /* Version of form [<epoch>:]<version>[-<extra-version>]. | |
146 | Or for CVS/RCS ID version, everything but the number is stripped. | |
147 | <epoch>: A (small) unsigned integer which allows you to start versions | |
148 | anew. If not mentioned, it's zero. eg. "2:1.0" is after | |
149 | "1:2.0". | |
150 | <version>: The <version> may contain only alphanumerics and the | |
151 | character `.'. Ordered by numeric sort for numeric parts, | |
152 | ascii sort for ascii parts (as per RPM or DEB algorithm). | |
153 | <extraversion>: Like <version>, but inserted for local | |
154 | customizations, eg "rh3" or "rusty1". | |
155 | ||
156 | Using this automatically adds a checksum of the .c files and the | |
157 | local headers in "srcversion". | |
158 | */ | |
159 | #define MODULE_VERSION(_version) MODULE_INFO(version, _version) | |
160 | ||
161 | /* Optional firmware file (or files) needed by the module | |
162 | * format is simply firmware file name. Multiple firmware | |
163 | * files require multiple MODULE_FIRMWARE() specifiers */ | |
164 | #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) | |
165 | ||
166 | /* Given an address, look for it in the exception tables */ | |
167 | const struct exception_table_entry *search_exception_tables(unsigned long add); | |
168 | ||
169 | struct notifier_block; | |
170 | ||
171 | #ifdef CONFIG_MODULES | |
172 | ||
173 | /* Get/put a kernel symbol (calls must be symmetric) */ | |
174 | void *__symbol_get(const char *symbol); | |
175 | void *__symbol_get_gpl(const char *symbol); | |
176 | #define symbol_get(x) ((typeof(&x))(__symbol_get(MODULE_SYMBOL_PREFIX #x))) | |
177 | ||
178 | #ifndef __GENKSYMS__ | |
179 | #ifdef CONFIG_MODVERSIONS | |
180 | /* Mark the CRC weak since genksyms apparently decides not to | |
181 | * generate a checksums for some symbols */ | |
182 | #define __CRC_SYMBOL(sym, sec) \ | |
183 | extern void *__crc_##sym __attribute__((weak)); \ | |
184 | static const unsigned long __kcrctab_##sym \ | |
185 | __used \ | |
186 | __attribute__((section("__kcrctab" sec), unused)) \ | |
187 | = (unsigned long) &__crc_##sym; | |
188 | #else | |
189 | #define __CRC_SYMBOL(sym, sec) | |
190 | #endif | |
191 | ||
192 | /* For every exported symbol, place a struct in the __ksymtab section */ | |
193 | #define __EXPORT_SYMBOL(sym, sec) \ | |
194 | extern typeof(sym) sym; \ | |
195 | __CRC_SYMBOL(sym, sec) \ | |
196 | static const char __kstrtab_##sym[] \ | |
197 | __attribute__((section("__ksymtab_strings"), aligned(1))) \ | |
198 | = MODULE_SYMBOL_PREFIX #sym; \ | |
199 | static const struct kernel_symbol __ksymtab_##sym \ | |
200 | __used \ | |
201 | __attribute__((section("__ksymtab" sec), unused)) \ | |
202 | = { (unsigned long)&sym, __kstrtab_##sym } | |
203 | ||
204 | #define EXPORT_SYMBOL(sym) \ | |
205 | __EXPORT_SYMBOL(sym, "") | |
206 | ||
207 | #define EXPORT_SYMBOL_GPL(sym) \ | |
208 | __EXPORT_SYMBOL(sym, "_gpl") | |
209 | ||
210 | #define EXPORT_SYMBOL_GPL_FUTURE(sym) \ | |
211 | __EXPORT_SYMBOL(sym, "_gpl_future") | |
212 | ||
213 | ||
214 | #ifdef CONFIG_UNUSED_SYMBOLS | |
215 | #define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused") | |
216 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl") | |
217 | #else | |
218 | #define EXPORT_UNUSED_SYMBOL(sym) | |
219 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) | |
220 | #endif | |
221 | ||
222 | #endif | |
223 | ||
224 | enum module_state | |
225 | { | |
226 | MODULE_STATE_LIVE, | |
227 | MODULE_STATE_COMING, | |
228 | MODULE_STATE_GOING, | |
229 | }; | |
230 | ||
231 | struct module | |
232 | { | |
233 | enum module_state state; | |
234 | ||
235 | /* Member of list of modules */ | |
236 | struct list_head list; | |
237 | ||
238 | /* Unique handle for this module */ | |
239 | char name[MODULE_NAME_LEN]; | |
240 | ||
241 | /* Sysfs stuff. */ | |
242 | struct module_kobject mkobj; | |
243 | struct module_attribute *modinfo_attrs; | |
244 | const char *version; | |
245 | const char *srcversion; | |
246 | struct kobject *holders_dir; | |
247 | ||
248 | /* Exported symbols */ | |
249 | const struct kernel_symbol *syms; | |
250 | const unsigned long *crcs; | |
251 | unsigned int num_syms; | |
252 | ||
253 | /* Kernel parameters. */ | |
254 | struct kernel_param *kp; | |
255 | unsigned int num_kp; | |
256 | ||
257 | /* GPL-only exported symbols. */ | |
258 | unsigned int num_gpl_syms; | |
259 | const struct kernel_symbol *gpl_syms; | |
260 | const unsigned long *gpl_crcs; | |
261 | ||
262 | #ifdef CONFIG_UNUSED_SYMBOLS | |
263 | /* unused exported symbols. */ | |
264 | const struct kernel_symbol *unused_syms; | |
265 | const unsigned long *unused_crcs; | |
266 | unsigned int num_unused_syms; | |
267 | ||
268 | /* GPL-only, unused exported symbols. */ | |
269 | unsigned int num_unused_gpl_syms; | |
270 | const struct kernel_symbol *unused_gpl_syms; | |
271 | const unsigned long *unused_gpl_crcs; | |
272 | #endif | |
273 | ||
274 | /* symbols that will be GPL-only in the near future. */ | |
275 | const struct kernel_symbol *gpl_future_syms; | |
276 | const unsigned long *gpl_future_crcs; | |
277 | unsigned int num_gpl_future_syms; | |
278 | ||
279 | /* Exception table */ | |
280 | unsigned int num_exentries; | |
281 | struct exception_table_entry *extable; | |
282 | ||
283 | /* Startup function. */ | |
284 | int (*init)(void); | |
285 | ||
286 | /* If this is non-NULL, vfree after init() returns */ | |
287 | void *module_init; | |
288 | ||
289 | /* Here is the actual code + data, vfree'd on unload. */ | |
290 | void *module_core; | |
291 | ||
292 | /* Here are the sizes of the init and core sections */ | |
293 | unsigned int init_size, core_size; | |
294 | ||
295 | /* The size of the executable code in each section. */ | |
296 | unsigned int init_text_size, core_text_size; | |
297 | ||
298 | /* Arch-specific module values */ | |
299 | struct mod_arch_specific arch; | |
300 | ||
301 | unsigned int taints; /* same bits as kernel:tainted */ | |
302 | ||
303 | #ifdef CONFIG_GENERIC_BUG | |
304 | /* Support for BUG */ | |
305 | unsigned num_bugs; | |
306 | struct list_head bug_list; | |
307 | struct bug_entry *bug_table; | |
308 | #endif | |
309 | ||
310 | #ifdef CONFIG_KALLSYMS | |
311 | /* | |
312 | * We keep the symbol and string tables for kallsyms. | |
313 | * The core_* fields below are temporary, loader-only (they | |
314 | * could really be discarded after module init). | |
315 | */ | |
316 | Elf_Sym *symtab, *core_symtab; | |
317 | unsigned int num_symtab, core_num_syms; | |
318 | char *strtab, *core_strtab; | |
319 | ||
320 | /* Section attributes */ | |
321 | struct module_sect_attrs *sect_attrs; | |
322 | ||
323 | /* Notes attributes */ | |
324 | struct module_notes_attrs *notes_attrs; | |
325 | #endif | |
326 | ||
327 | /* Per-cpu data. */ | |
328 | void *percpu; | |
329 | ||
330 | /* The command line arguments (may be mangled). People like | |
331 | keeping pointers to this stuff */ | |
332 | char *args; | |
333 | #ifdef CONFIG_TRACEPOINTS | |
334 | struct tracepoint *tracepoints; | |
335 | unsigned int num_tracepoints; | |
336 | #endif | |
337 | ||
338 | #ifdef CONFIG_TRACING | |
339 | const char **trace_bprintk_fmt_start; | |
340 | unsigned int num_trace_bprintk_fmt; | |
341 | #endif | |
342 | #ifdef CONFIG_EVENT_TRACING | |
343 | struct ftrace_event_call *trace_events; | |
344 | unsigned int num_trace_events; | |
345 | #endif | |
346 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD | |
347 | unsigned long *ftrace_callsites; | |
348 | unsigned int num_ftrace_callsites; | |
349 | #endif | |
350 | ||
351 | #ifdef CONFIG_MODULE_UNLOAD | |
352 | /* What modules depend on me? */ | |
353 | struct list_head modules_which_use_me; | |
354 | ||
355 | /* Who is waiting for us to be unloaded */ | |
356 | struct task_struct *waiter; | |
357 | ||
358 | /* Destruction function. */ | |
359 | void (*exit)(void); | |
360 | ||
361 | #ifdef CONFIG_SMP | |
362 | char *refptr; | |
363 | #else | |
364 | local_t ref; | |
365 | #endif | |
366 | #endif | |
367 | ||
368 | #ifdef CONFIG_CONSTRUCTORS | |
369 | /* Constructor functions. */ | |
370 | ctor_fn_t *ctors; | |
371 | unsigned int num_ctors; | |
372 | #endif | |
373 | }; | |
374 | #ifndef MODULE_ARCH_INIT | |
375 | #define MODULE_ARCH_INIT {} | |
376 | #endif | |
377 | ||
378 | extern struct mutex module_mutex; | |
379 | ||
380 | /* FIXME: It'd be nice to isolate modules during init, too, so they | |
381 | aren't used before they (may) fail. But presently too much code | |
382 | (IDE & SCSI) require entry into the module during init.*/ | |
383 | static inline int module_is_live(struct module *mod) | |
384 | { | |
385 | return mod->state != MODULE_STATE_GOING; | |
386 | } | |
387 | ||
388 | struct module *__module_text_address(unsigned long addr); | |
389 | struct module *__module_address(unsigned long addr); | |
390 | bool is_module_address(unsigned long addr); | |
391 | bool is_module_text_address(unsigned long addr); | |
392 | ||
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 | ||
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 */ | |
427 | bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner, | |
428 | unsigned int symnum, void *data), void *data); | |
429 | ||
430 | /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if | |
431 | symnum out of range. */ | |
432 | int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, | |
433 | char *name, char *module_name, int *exported); | |
434 | ||
435 | /* Look for this name: can be of form module:name. */ | |
436 | unsigned long module_kallsyms_lookup_name(const char *name); | |
437 | ||
438 | int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, | |
439 | struct module *, unsigned long), | |
440 | void *data); | |
441 | ||
442 | extern void __module_put_and_exit(struct module *mod, long code) | |
443 | __attribute__((noreturn)); | |
444 | #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code); | |
445 | ||
446 | #ifdef CONFIG_MODULE_UNLOAD | |
447 | unsigned int module_refcount(struct module *mod); | |
448 | void __symbol_put(const char *symbol); | |
449 | #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x) | |
450 | void symbol_put_addr(void *addr); | |
451 | ||
452 | static inline local_t *__module_ref_addr(struct module *mod, int cpu) | |
453 | { | |
454 | #ifdef CONFIG_SMP | |
455 | return (local_t *) (mod->refptr + per_cpu_offset(cpu)); | |
456 | #else | |
457 | return &mod->ref; | |
458 | #endif | |
459 | } | |
460 | ||
461 | /* Sometimes we know we already have a refcount, and it's easier not | |
462 | to handle the error case (which only happens with rmmod --wait). */ | |
463 | static inline void __module_get(struct module *module) | |
464 | { | |
465 | if (module) { | |
466 | unsigned int cpu = get_cpu(); | |
467 | local_inc(__module_ref_addr(module, cpu)); | |
468 | trace_module_get(module, _THIS_IP_, | |
469 | local_read(__module_ref_addr(module, cpu))); | |
470 | put_cpu(); | |
471 | } | |
472 | } | |
473 | ||
474 | static inline int try_module_get(struct module *module) | |
475 | { | |
476 | int ret = 1; | |
477 | ||
478 | if (module) { | |
479 | unsigned int cpu = get_cpu(); | |
480 | if (likely(module_is_live(module))) { | |
481 | local_inc(__module_ref_addr(module, cpu)); | |
482 | trace_module_get(module, _THIS_IP_, | |
483 | local_read(__module_ref_addr(module, cpu))); | |
484 | } | |
485 | else | |
486 | ret = 0; | |
487 | put_cpu(); | |
488 | } | |
489 | return ret; | |
490 | } | |
491 | ||
492 | extern void module_put(struct module *module); | |
493 | ||
494 | #else /*!CONFIG_MODULE_UNLOAD*/ | |
495 | static inline int try_module_get(struct module *module) | |
496 | { | |
497 | return !module || module_is_live(module); | |
498 | } | |
499 | static inline void module_put(struct module *module) | |
500 | { | |
501 | } | |
502 | static inline void __module_get(struct module *module) | |
503 | { | |
504 | } | |
505 | #define symbol_put(x) do { } while(0) | |
506 | #define symbol_put_addr(p) do { } while(0) | |
507 | ||
508 | #endif /* CONFIG_MODULE_UNLOAD */ | |
509 | int use_module(struct module *a, struct module *b); | |
510 | ||
511 | /* This is a #define so the string doesn't get put in every .o file */ | |
512 | #define module_name(mod) \ | |
513 | ({ \ | |
514 | struct module *__mod = (mod); \ | |
515 | __mod ? __mod->name : "kernel"; \ | |
516 | }) | |
517 | ||
518 | /* For kallsyms to ask for address resolution. namebuf should be at | |
519 | * least KSYM_NAME_LEN long: a pointer to namebuf is returned if | |
520 | * found, otherwise NULL. */ | |
521 | const char *module_address_lookup(unsigned long addr, | |
522 | unsigned long *symbolsize, | |
523 | unsigned long *offset, | |
524 | char **modname, | |
525 | char *namebuf); | |
526 | int lookup_module_symbol_name(unsigned long addr, char *symname); | |
527 | int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); | |
528 | ||
529 | /* For extable.c to search modules' exception tables. */ | |
530 | const struct exception_table_entry *search_module_extables(unsigned long addr); | |
531 | ||
532 | int register_module_notifier(struct notifier_block * nb); | |
533 | int unregister_module_notifier(struct notifier_block * nb); | |
534 | ||
535 | extern void print_modules(void); | |
536 | ||
537 | extern void module_update_tracepoints(void); | |
538 | extern int module_get_iter_tracepoints(struct tracepoint_iter *iter); | |
539 | ||
540 | #else /* !CONFIG_MODULES... */ | |
541 | #define EXPORT_SYMBOL(sym) | |
542 | #define EXPORT_SYMBOL_GPL(sym) | |
543 | #define EXPORT_SYMBOL_GPL_FUTURE(sym) | |
544 | #define EXPORT_UNUSED_SYMBOL(sym) | |
545 | #define EXPORT_UNUSED_SYMBOL_GPL(sym) | |
546 | ||
547 | /* Given an address, look for it in the exception tables. */ | |
548 | static inline const struct exception_table_entry * | |
549 | search_module_extables(unsigned long addr) | |
550 | { | |
551 | return NULL; | |
552 | } | |
553 | ||
554 | static inline struct module *__module_address(unsigned long addr) | |
555 | { | |
556 | return NULL; | |
557 | } | |
558 | ||
559 | static inline struct module *__module_text_address(unsigned long addr) | |
560 | { | |
561 | return NULL; | |
562 | } | |
563 | ||
564 | static inline bool is_module_address(unsigned long addr) | |
565 | { | |
566 | return false; | |
567 | } | |
568 | ||
569 | static inline bool is_module_text_address(unsigned long addr) | |
570 | { | |
571 | return false; | |
572 | } | |
573 | ||
574 | /* Get/put a kernel symbol (calls should be symmetric) */ | |
575 | #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); }) | |
576 | #define symbol_put(x) do { } while(0) | |
577 | #define symbol_put_addr(x) do { } while(0) | |
578 | ||
579 | static inline void __module_get(struct module *module) | |
580 | { | |
581 | } | |
582 | ||
583 | static inline int try_module_get(struct module *module) | |
584 | { | |
585 | return 1; | |
586 | } | |
587 | ||
588 | static inline void module_put(struct module *module) | |
589 | { | |
590 | } | |
591 | ||
592 | #define module_name(mod) "kernel" | |
593 | ||
594 | /* For kallsyms to ask for address resolution. NULL means not found. */ | |
595 | static inline const char *module_address_lookup(unsigned long addr, | |
596 | unsigned long *symbolsize, | |
597 | unsigned long *offset, | |
598 | char **modname, | |
599 | char *namebuf) | |
600 | { | |
601 | return NULL; | |
602 | } | |
603 | ||
604 | static inline int lookup_module_symbol_name(unsigned long addr, char *symname) | |
605 | { | |
606 | return -ERANGE; | |
607 | } | |
608 | ||
609 | static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) | |
610 | { | |
611 | return -ERANGE; | |
612 | } | |
613 | ||
614 | static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, | |
615 | char *type, char *name, | |
616 | char *module_name, int *exported) | |
617 | { | |
618 | return -ERANGE; | |
619 | } | |
620 | ||
621 | static inline unsigned long module_kallsyms_lookup_name(const char *name) | |
622 | { | |
623 | return 0; | |
624 | } | |
625 | ||
626 | static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, | |
627 | struct module *, | |
628 | unsigned long), | |
629 | void *data) | |
630 | { | |
631 | return 0; | |
632 | } | |
633 | ||
634 | static inline int register_module_notifier(struct notifier_block * nb) | |
635 | { | |
636 | /* no events will happen anyway, so this can always succeed */ | |
637 | return 0; | |
638 | } | |
639 | ||
640 | static inline int unregister_module_notifier(struct notifier_block * nb) | |
641 | { | |
642 | return 0; | |
643 | } | |
644 | ||
645 | #define module_put_and_exit(code) do_exit(code) | |
646 | ||
647 | static inline void print_modules(void) | |
648 | { | |
649 | } | |
650 | ||
651 | static inline void module_update_tracepoints(void) | |
652 | { | |
653 | } | |
654 | ||
655 | static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter) | |
656 | { | |
657 | return 0; | |
658 | } | |
659 | ||
660 | #endif /* CONFIG_MODULES */ | |
661 | ||
662 | struct device_driver; | |
663 | #ifdef CONFIG_SYSFS | |
664 | struct module; | |
665 | ||
666 | extern struct kset *module_kset; | |
667 | extern struct kobj_type module_ktype; | |
668 | extern int module_sysfs_initialized; | |
669 | ||
670 | int mod_sysfs_init(struct module *mod); | |
671 | int mod_sysfs_setup(struct module *mod, | |
672 | struct kernel_param *kparam, | |
673 | unsigned int num_params); | |
674 | int module_add_modinfo_attrs(struct module *mod); | |
675 | void module_remove_modinfo_attrs(struct module *mod); | |
676 | ||
677 | #else /* !CONFIG_SYSFS */ | |
678 | ||
679 | static inline int mod_sysfs_init(struct module *mod) | |
680 | { | |
681 | return 0; | |
682 | } | |
683 | ||
684 | static inline int mod_sysfs_setup(struct module *mod, | |
685 | struct kernel_param *kparam, | |
686 | unsigned int num_params) | |
687 | { | |
688 | return 0; | |
689 | } | |
690 | ||
691 | static inline int module_add_modinfo_attrs(struct module *mod) | |
692 | { | |
693 | return 0; | |
694 | } | |
695 | ||
696 | static inline void module_remove_modinfo_attrs(struct module *mod) | |
697 | { } | |
698 | ||
699 | #endif /* CONFIG_SYSFS */ | |
700 | ||
701 | #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) | |
702 | ||
703 | /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ | |
704 | ||
705 | #define __MODULE_STRING(x) __stringify(x) | |
706 | ||
707 | ||
708 | #ifdef CONFIG_GENERIC_BUG | |
709 | int module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, | |
710 | struct module *); | |
711 | void module_bug_cleanup(struct module *); | |
712 | ||
713 | #else /* !CONFIG_GENERIC_BUG */ | |
714 | ||
715 | static inline int module_bug_finalize(const Elf_Ehdr *hdr, | |
716 | const Elf_Shdr *sechdrs, | |
717 | struct module *mod) | |
718 | { | |
719 | return 0; | |
720 | } | |
721 | static inline void module_bug_cleanup(struct module *mod) {} | |
722 | #endif /* CONFIG_GENERIC_BUG */ | |
723 | ||
724 | #endif /* _LINUX_MODULE_H */ |