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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 | ||
106a4ee2 RR |
24 | /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */ |
25 | #define MODULE_SIG_STRING "~Module signature appended~\n" | |
26 | ||
1da177e4 LT |
27 | /* Not Yet Implemented */ |
28 | #define MODULE_SUPPORTED_DEVICE(name) | |
29 | ||
730b69d2 | 30 | #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN |
1da177e4 | 31 | |
1da177e4 LT |
32 | struct modversion_info |
33 | { | |
34 | unsigned long crc; | |
35 | char name[MODULE_NAME_LEN]; | |
36 | }; | |
37 | ||
38 | struct module; | |
39 | ||
4befb026 KS |
40 | struct module_kobject { |
41 | struct kobject kobj; | |
42 | struct module *mod; | |
43 | struct kobject *drivers_dir; | |
44 | struct module_param_attrs *mp; | |
942e4431 | 45 | struct completion *kobj_completion; |
4befb026 KS |
46 | }; |
47 | ||
1da177e4 | 48 | struct module_attribute { |
4befb026 KS |
49 | struct attribute attr; |
50 | ssize_t (*show)(struct module_attribute *, struct module_kobject *, | |
51 | char *); | |
52 | ssize_t (*store)(struct module_attribute *, struct module_kobject *, | |
1da177e4 | 53 | const char *, size_t count); |
c988d2b2 MD |
54 | void (*setup)(struct module *, const char *); |
55 | int (*test)(struct module *); | |
56 | void (*free)(struct module *); | |
1da177e4 LT |
57 | }; |
58 | ||
e94965ed DT |
59 | struct module_version_attribute { |
60 | struct module_attribute mattr; | |
61 | const char *module_name; | |
62 | const char *version; | |
98562ad8 | 63 | } __attribute__ ((__aligned__(sizeof(void *)))); |
e94965ed | 64 | |
9b73a584 | 65 | extern ssize_t __modver_version_show(struct module_attribute *, |
4befb026 | 66 | struct module_kobject *, char *); |
9b73a584 | 67 | |
88bfa324 | 68 | extern struct module_attribute module_uevent; |
1da177e4 LT |
69 | |
70 | /* These are either module local, or the kernel's dummy ones. */ | |
71 | extern int init_module(void); | |
72 | extern void cleanup_module(void); | |
73 | ||
74 | /* Archs provide a method of finding the correct exception table. */ | |
75 | struct exception_table_entry; | |
76 | ||
77 | const struct exception_table_entry * | |
78 | search_extable(const struct exception_table_entry *first, | |
79 | const struct exception_table_entry *last, | |
80 | unsigned long value); | |
81 | void sort_extable(struct exception_table_entry *start, | |
82 | struct exception_table_entry *finish); | |
83 | void sort_main_extable(void); | |
ad6561df | 84 | void trim_init_extable(struct module *m); |
1da177e4 | 85 | |
1da177e4 LT |
86 | #ifdef MODULE |
87 | #define MODULE_GENERIC_TABLE(gtype,name) \ | |
88 | extern const struct gtype##_id __mod_##gtype##_table \ | |
89 | __attribute__ ((unused, alias(__stringify(name)))) | |
90 | ||
1da177e4 LT |
91 | #else /* !MODULE */ |
92 | #define MODULE_GENERIC_TABLE(gtype,name) | |
1da177e4 LT |
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 | ||
7cb14ba7 AR |
101 | /* Soft module dependencies. See man modprobe.d for details. |
102 | * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz") | |
103 | */ | |
104 | #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep) | |
105 | ||
1da177e4 LT |
106 | /* |
107 | * The following license idents are currently accepted as indicating free | |
108 | * software modules | |
109 | * | |
110 | * "GPL" [GNU Public License v2 or later] | |
111 | * "GPL v2" [GNU Public License v2] | |
112 | * "GPL and additional rights" [GNU Public License v2 rights and more] | |
113 | * "Dual BSD/GPL" [GNU Public License v2 | |
114 | * or BSD license choice] | |
8d27e908 XVP |
115 | * "Dual MIT/GPL" [GNU Public License v2 |
116 | * or MIT license choice] | |
1da177e4 LT |
117 | * "Dual MPL/GPL" [GNU Public License v2 |
118 | * or Mozilla license choice] | |
119 | * | |
120 | * The following other idents are available | |
121 | * | |
122 | * "Proprietary" [Non free products] | |
123 | * | |
124 | * There are dual licensed components, but when running with Linux it is the | |
125 | * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL | |
126 | * is a GPL combined work. | |
127 | * | |
128 | * This exists for several reasons | |
129 | * 1. So modinfo can show license info for users wanting to vet their setup | |
130 | * is free | |
131 | * 2. So the community can ignore bug reports including proprietary modules | |
132 | * 3. So vendors can do likewise based on their own policies | |
133 | */ | |
134 | #define MODULE_LICENSE(_license) MODULE_INFO(license, _license) | |
135 | ||
1d7015ca JB |
136 | /* |
137 | * Author(s), use "Name <email>" or just "Name", for multiple | |
138 | * authors use multiple MODULE_AUTHOR() statements/lines. | |
139 | */ | |
1da177e4 LT |
140 | #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) |
141 | ||
142 | /* What your module does. */ | |
143 | #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) | |
144 | ||
1da177e4 LT |
145 | #define MODULE_DEVICE_TABLE(type,name) \ |
146 | MODULE_GENERIC_TABLE(type##_device,name) | |
147 | ||
148 | /* Version of form [<epoch>:]<version>[-<extra-version>]. | |
149 | Or for CVS/RCS ID version, everything but the number is stripped. | |
150 | <epoch>: A (small) unsigned integer which allows you to start versions | |
151 | anew. If not mentioned, it's zero. eg. "2:1.0" is after | |
152 | "1:2.0". | |
153 | <version>: The <version> may contain only alphanumerics and the | |
154 | character `.'. Ordered by numeric sort for numeric parts, | |
155 | ascii sort for ascii parts (as per RPM or DEB algorithm). | |
156 | <extraversion>: Like <version>, but inserted for local | |
157 | customizations, eg "rh3" or "rusty1". | |
158 | ||
159 | Using this automatically adds a checksum of the .c files and the | |
160 | local headers in "srcversion". | |
161 | */ | |
e94965ed | 162 | |
3b90a5b2 | 163 | #if defined(MODULE) || !defined(CONFIG_SYSFS) |
1da177e4 | 164 | #define MODULE_VERSION(_version) MODULE_INFO(version, _version) |
e94965ed DT |
165 | #else |
166 | #define MODULE_VERSION(_version) \ | |
b4bc8428 | 167 | static struct module_version_attribute ___modver_attr = { \ |
e94965ed DT |
168 | .mattr = { \ |
169 | .attr = { \ | |
170 | .name = "version", \ | |
171 | .mode = S_IRUGO, \ | |
172 | }, \ | |
173 | .show = __modver_version_show, \ | |
174 | }, \ | |
175 | .module_name = KBUILD_MODNAME, \ | |
176 | .version = _version, \ | |
b4bc8428 DT |
177 | }; \ |
178 | static const struct module_version_attribute \ | |
179 | __used __attribute__ ((__section__ ("__modver"))) \ | |
180 | * __moduleparam_const __modver_attr = &___modver_attr | |
e94965ed | 181 | #endif |
1da177e4 | 182 | |
187afbed JM |
183 | /* Optional firmware file (or files) needed by the module |
184 | * format is simply firmware file name. Multiple firmware | |
185 | * files require multiple MODULE_FIRMWARE() specifiers */ | |
186 | #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) | |
187 | ||
1da177e4 LT |
188 | /* Given an address, look for it in the exception tables */ |
189 | const struct exception_table_entry *search_exception_tables(unsigned long add); | |
190 | ||
191 | struct notifier_block; | |
192 | ||
193 | #ifdef CONFIG_MODULES | |
194 | ||
5ed10910 | 195 | extern int modules_disabled; /* for sysctl */ |
1da177e4 LT |
196 | /* Get/put a kernel symbol (calls must be symmetric) */ |
197 | void *__symbol_get(const char *symbol); | |
198 | void *__symbol_get_gpl(const char *symbol); | |
b92021b0 | 199 | #define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x)))) |
1da177e4 | 200 | |
c8e21ced RR |
201 | /* modules using other modules: kdb wants to see this. */ |
202 | struct module_use { | |
203 | struct list_head source_list; | |
204 | struct list_head target_list; | |
205 | struct module *source, *target; | |
206 | }; | |
207 | ||
0d21b0e3 RR |
208 | enum module_state { |
209 | MODULE_STATE_LIVE, /* Normal state. */ | |
210 | MODULE_STATE_COMING, /* Full formed, running module_init. */ | |
211 | MODULE_STATE_GOING, /* Going away. */ | |
212 | MODULE_STATE_UNFORMED, /* Still setting it up. */ | |
1da177e4 LT |
213 | }; |
214 | ||
bd77c047 ED |
215 | /** |
216 | * struct module_ref - per cpu module reference counts | |
217 | * @incs: number of module get on this cpu | |
218 | * @decs: number of module put on this cpu | |
219 | * | |
220 | * We force an alignment on 8 or 16 bytes, so that alloc_percpu() | |
221 | * put @incs/@decs in same cache line, with no extra memory cost, | |
222 | * since alloc_percpu() is fine grained. | |
223 | */ | |
224 | struct module_ref { | |
225 | unsigned long incs; | |
226 | unsigned long decs; | |
227 | } __attribute((aligned(2 * sizeof(unsigned long)))); | |
228 | ||
1da177e4 LT |
229 | struct 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; | |
03e88ae1 | 241 | struct module_attribute *modinfo_attrs; |
c988d2b2 MD |
242 | const char *version; |
243 | const char *srcversion; | |
270a6c4c | 244 | struct kobject *holders_dir; |
1da177e4 LT |
245 | |
246 | /* Exported symbols */ | |
247 | const struct kernel_symbol *syms; | |
1da177e4 | 248 | const unsigned long *crcs; |
af540689 | 249 | unsigned int num_syms; |
1da177e4 | 250 | |
e180a6b7 RR |
251 | /* Kernel parameters. */ |
252 | struct kernel_param *kp; | |
253 | unsigned int num_kp; | |
254 | ||
1da177e4 | 255 | /* GPL-only exported symbols. */ |
1da177e4 | 256 | unsigned int num_gpl_syms; |
af540689 | 257 | const struct kernel_symbol *gpl_syms; |
1da177e4 LT |
258 | const unsigned long *gpl_crcs; |
259 | ||
f7f5b675 | 260 | #ifdef CONFIG_UNUSED_SYMBOLS |
f71d20e9 AV |
261 | /* unused exported symbols. */ |
262 | const struct kernel_symbol *unused_syms; | |
f71d20e9 | 263 | const unsigned long *unused_crcs; |
af540689 RK |
264 | unsigned int num_unused_syms; |
265 | ||
f71d20e9 | 266 | /* GPL-only, unused exported symbols. */ |
f71d20e9 | 267 | unsigned int num_unused_gpl_syms; |
af540689 | 268 | const struct kernel_symbol *unused_gpl_syms; |
f71d20e9 | 269 | const unsigned long *unused_gpl_crcs; |
f7f5b675 | 270 | #endif |
f71d20e9 | 271 | |
106a4ee2 RR |
272 | #ifdef CONFIG_MODULE_SIG |
273 | /* Signature was verified. */ | |
274 | bool sig_ok; | |
275 | #endif | |
276 | ||
9f28bb7e GKH |
277 | /* symbols that will be GPL-only in the near future. */ |
278 | const struct kernel_symbol *gpl_future_syms; | |
9f28bb7e | 279 | const unsigned long *gpl_future_crcs; |
af540689 | 280 | unsigned int num_gpl_future_syms; |
9f28bb7e | 281 | |
1da177e4 LT |
282 | /* Exception table */ |
283 | unsigned int num_exentries; | |
5e458cc0 | 284 | struct exception_table_entry *extable; |
1da177e4 LT |
285 | |
286 | /* Startup function. */ | |
287 | int (*init)(void); | |
288 | ||
289 | /* If this is non-NULL, vfree after init() returns */ | |
290 | void *module_init; | |
291 | ||
292 | /* Here is the actual code + data, vfree'd on unload. */ | |
293 | void *module_core; | |
294 | ||
295 | /* Here are the sizes of the init and core sections */ | |
2f0f2a33 | 296 | unsigned int init_size, core_size; |
1da177e4 LT |
297 | |
298 | /* The size of the executable code in each section. */ | |
2f0f2a33 | 299 | unsigned int init_text_size, core_text_size; |
1da177e4 | 300 | |
84e1c6bb MC |
301 | /* Size of RO sections of the module (text+rodata) */ |
302 | unsigned int init_ro_size, core_ro_size; | |
303 | ||
1da177e4 LT |
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 | ||
a288bd65 RK |
333 | /* The command line arguments (may be mangled). People like |
334 | keeping pointers to this stuff */ | |
335 | char *args; | |
336 | ||
259354de | 337 | #ifdef CONFIG_SMP |
1da177e4 | 338 | /* Per-cpu data. */ |
259354de TH |
339 | void __percpu *percpu; |
340 | unsigned int percpu_size; | |
341 | #endif | |
1da177e4 | 342 | |
97e1c18e | 343 | #ifdef CONFIG_TRACEPOINTS |
97e1c18e | 344 | unsigned int num_tracepoints; |
a288bd65 | 345 | struct tracepoint * const *tracepoints_ptrs; |
97e1c18e | 346 | #endif |
bf5438fc JB |
347 | #ifdef HAVE_JUMP_LABEL |
348 | struct jump_entry *jump_entries; | |
349 | unsigned int num_jump_entries; | |
350 | #endif | |
769b0441 | 351 | #ifdef CONFIG_TRACING |
1ba28e02 | 352 | unsigned int num_trace_bprintk_fmt; |
a288bd65 | 353 | const char **trace_bprintk_fmt_start; |
1ba28e02 | 354 | #endif |
6d723736 | 355 | #ifdef CONFIG_EVENT_TRACING |
e4a9ea5e | 356 | struct ftrace_event_call **trace_events; |
6d723736 SR |
357 | unsigned int num_trace_events; |
358 | #endif | |
93eb677d | 359 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
93eb677d | 360 | unsigned int num_ftrace_callsites; |
a288bd65 | 361 | unsigned long *ftrace_callsites; |
93eb677d | 362 | #endif |
1ba28e02 | 363 | |
af540689 RK |
364 | #ifdef CONFIG_MODULE_UNLOAD |
365 | /* What modules depend on me? */ | |
2c02dfe7 LT |
366 | struct list_head source_list; |
367 | /* What modules do I depend on? */ | |
368 | struct list_head target_list; | |
af540689 | 369 | |
af540689 RK |
370 | /* Destruction function. */ |
371 | void (*exit)(void); | |
372 | ||
bd77c047 | 373 | struct module_ref __percpu *refptr; |
af540689 | 374 | #endif |
b99b87f7 PO |
375 | |
376 | #ifdef CONFIG_CONSTRUCTORS | |
377 | /* Constructor functions. */ | |
378 | ctor_fn_t *ctors; | |
379 | unsigned int num_ctors; | |
380 | #endif | |
1da177e4 | 381 | }; |
e61a1c1c RZ |
382 | #ifndef MODULE_ARCH_INIT |
383 | #define MODULE_ARCH_INIT {} | |
384 | #endif | |
1da177e4 | 385 | |
c6b37801 TA |
386 | extern struct mutex module_mutex; |
387 | ||
1da177e4 LT |
388 | /* FIXME: It'd be nice to isolate modules during init, too, so they |
389 | aren't used before they (may) fail. But presently too much code | |
390 | (IDE & SCSI) require entry into the module during init.*/ | |
391 | static inline int module_is_live(struct module *mod) | |
392 | { | |
393 | return mod->state != MODULE_STATE_GOING; | |
394 | } | |
395 | ||
1da177e4 | 396 | struct module *__module_text_address(unsigned long addr); |
e610499e RR |
397 | struct module *__module_address(unsigned long addr); |
398 | bool is_module_address(unsigned long addr); | |
10fad5e4 | 399 | bool is_module_percpu_address(unsigned long addr); |
e610499e | 400 | bool is_module_text_address(unsigned long addr); |
1da177e4 | 401 | |
93843b37 | 402 | static inline int within_module_core(unsigned long addr, const struct module *mod) |
a06f6211 MH |
403 | { |
404 | return (unsigned long)mod->module_core <= addr && | |
405 | addr < (unsigned long)mod->module_core + mod->core_size; | |
406 | } | |
407 | ||
93843b37 | 408 | static inline int within_module_init(unsigned long addr, const struct module *mod) |
a06f6211 MH |
409 | { |
410 | return (unsigned long)mod->module_init <= addr && | |
411 | addr < (unsigned long)mod->module_init + mod->init_size; | |
412 | } | |
413 | ||
c6b37801 TA |
414 | /* Search for module by name: must hold module_mutex. */ |
415 | struct module *find_module(const char *name); | |
416 | ||
417 | struct symsearch { | |
418 | const struct kernel_symbol *start, *stop; | |
419 | const unsigned long *crcs; | |
420 | enum { | |
421 | NOT_GPL_ONLY, | |
422 | GPL_ONLY, | |
423 | WILL_BE_GPL_ONLY, | |
424 | } licence; | |
425 | bool unused; | |
426 | }; | |
427 | ||
428 | /* Search for an exported symbol by name. */ | |
429 | const struct kernel_symbol *find_symbol(const char *name, | |
430 | struct module **owner, | |
431 | const unsigned long **crc, | |
432 | bool gplok, | |
433 | bool warn); | |
434 | ||
435 | /* Walk the exported symbol table */ | |
de4d8d53 RR |
436 | bool each_symbol_section(bool (*fn)(const struct symsearch *arr, |
437 | struct module *owner, | |
438 | void *data), void *data); | |
c6b37801 | 439 | |
ea07890a | 440 | /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if |
1da177e4 | 441 | symnum out of range. */ |
ea07890a AD |
442 | int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, |
443 | char *name, char *module_name, int *exported); | |
1da177e4 LT |
444 | |
445 | /* Look for this name: can be of form module:name. */ | |
446 | unsigned long module_kallsyms_lookup_name(const char *name); | |
447 | ||
75a66614 AK |
448 | int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
449 | struct module *, unsigned long), | |
450 | void *data); | |
451 | ||
1da177e4 LT |
452 | extern void __module_put_and_exit(struct module *mod, long code) |
453 | __attribute__((noreturn)); | |
454 | #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code); | |
455 | ||
456 | #ifdef CONFIG_MODULE_UNLOAD | |
bd77c047 | 457 | unsigned long module_refcount(struct module *mod); |
1da177e4 | 458 | void __symbol_put(const char *symbol); |
b92021b0 | 459 | #define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x)) |
1da177e4 LT |
460 | void symbol_put_addr(void *addr); |
461 | ||
462 | /* Sometimes we know we already have a refcount, and it's easier not | |
463 | to handle the error case (which only happens with rmmod --wait). */ | |
d53799be | 464 | extern void __module_get(struct module *module); |
e1783a24 | 465 | |
d53799be SR |
466 | /* This is the Right Way to get a module: if it fails, it's being removed, |
467 | * so pretend it's not there. */ | |
468 | extern bool try_module_get(struct module *module); | |
1da177e4 | 469 | |
f6a57033 | 470 | extern void module_put(struct module *module); |
1da177e4 LT |
471 | |
472 | #else /*!CONFIG_MODULE_UNLOAD*/ | |
473 | static inline int try_module_get(struct module *module) | |
474 | { | |
475 | return !module || module_is_live(module); | |
476 | } | |
477 | static inline void module_put(struct module *module) | |
478 | { | |
479 | } | |
480 | static inline void __module_get(struct module *module) | |
481 | { | |
482 | } | |
483 | #define symbol_put(x) do { } while(0) | |
484 | #define symbol_put_addr(p) do { } while(0) | |
485 | ||
486 | #endif /* CONFIG_MODULE_UNLOAD */ | |
dfd62d1d | 487 | int ref_module(struct module *a, struct module *b); |
1da177e4 LT |
488 | |
489 | /* This is a #define so the string doesn't get put in every .o file */ | |
490 | #define module_name(mod) \ | |
491 | ({ \ | |
492 | struct module *__mod = (mod); \ | |
493 | __mod ? __mod->name : "kernel"; \ | |
494 | }) | |
495 | ||
6dd06c9f RR |
496 | /* For kallsyms to ask for address resolution. namebuf should be at |
497 | * least KSYM_NAME_LEN long: a pointer to namebuf is returned if | |
498 | * found, otherwise NULL. */ | |
92dfc9dc | 499 | const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
500 | unsigned long *symbolsize, |
501 | unsigned long *offset, | |
502 | char **modname, | |
503 | char *namebuf); | |
9d65cb4a | 504 | int lookup_module_symbol_name(unsigned long addr, char *symname); |
a5c43dae | 505 | int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); |
1da177e4 LT |
506 | |
507 | /* For extable.c to search modules' exception tables. */ | |
508 | const struct exception_table_entry *search_module_extables(unsigned long addr); | |
509 | ||
510 | int register_module_notifier(struct notifier_block * nb); | |
511 | int unregister_module_notifier(struct notifier_block * nb); | |
512 | ||
513 | extern void print_modules(void); | |
514 | ||
1da177e4 | 515 | #else /* !CONFIG_MODULES... */ |
1da177e4 LT |
516 | |
517 | /* Given an address, look for it in the exception tables. */ | |
518 | static inline const struct exception_table_entry * | |
519 | search_module_extables(unsigned long addr) | |
520 | { | |
521 | return NULL; | |
522 | } | |
523 | ||
e610499e RR |
524 | static inline struct module *__module_address(unsigned long addr) |
525 | { | |
526 | return NULL; | |
527 | } | |
528 | ||
1da177e4 LT |
529 | static inline struct module *__module_text_address(unsigned long addr) |
530 | { | |
531 | return NULL; | |
532 | } | |
533 | ||
e610499e RR |
534 | static inline bool is_module_address(unsigned long addr) |
535 | { | |
536 | return false; | |
537 | } | |
538 | ||
d5e50daf RD |
539 | static inline bool is_module_percpu_address(unsigned long addr) |
540 | { | |
541 | return false; | |
542 | } | |
543 | ||
e610499e | 544 | static inline bool is_module_text_address(unsigned long addr) |
4d435f9d | 545 | { |
e610499e | 546 | return false; |
4d435f9d IM |
547 | } |
548 | ||
1da177e4 LT |
549 | /* Get/put a kernel symbol (calls should be symmetric) */ |
550 | #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); }) | |
551 | #define symbol_put(x) do { } while(0) | |
552 | #define symbol_put_addr(x) do { } while(0) | |
553 | ||
554 | static inline void __module_get(struct module *module) | |
555 | { | |
556 | } | |
557 | ||
558 | static inline int try_module_get(struct module *module) | |
559 | { | |
560 | return 1; | |
561 | } | |
562 | ||
563 | static inline void module_put(struct module *module) | |
564 | { | |
565 | } | |
566 | ||
567 | #define module_name(mod) "kernel" | |
568 | ||
1da177e4 | 569 | /* For kallsyms to ask for address resolution. NULL means not found. */ |
92dfc9dc | 570 | static inline const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
571 | unsigned long *symbolsize, |
572 | unsigned long *offset, | |
573 | char **modname, | |
574 | char *namebuf) | |
1da177e4 LT |
575 | { |
576 | return NULL; | |
577 | } | |
578 | ||
9d65cb4a AD |
579 | static inline int lookup_module_symbol_name(unsigned long addr, char *symname) |
580 | { | |
581 | return -ERANGE; | |
582 | } | |
583 | ||
a5c43dae AD |
584 | static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) |
585 | { | |
586 | return -ERANGE; | |
587 | } | |
588 | ||
ea07890a AD |
589 | static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, |
590 | char *type, char *name, | |
591 | char *module_name, int *exported) | |
1da177e4 | 592 | { |
ea07890a | 593 | return -ERANGE; |
1da177e4 LT |
594 | } |
595 | ||
596 | static inline unsigned long module_kallsyms_lookup_name(const char *name) | |
597 | { | |
598 | return 0; | |
599 | } | |
600 | ||
75a66614 AK |
601 | static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
602 | struct module *, | |
603 | unsigned long), | |
604 | void *data) | |
605 | { | |
606 | return 0; | |
607 | } | |
608 | ||
1da177e4 LT |
609 | static inline int register_module_notifier(struct notifier_block * nb) |
610 | { | |
611 | /* no events will happen anyway, so this can always succeed */ | |
612 | return 0; | |
613 | } | |
614 | ||
615 | static inline int unregister_module_notifier(struct notifier_block * nb) | |
616 | { | |
617 | return 0; | |
618 | } | |
619 | ||
620 | #define module_put_and_exit(code) do_exit(code) | |
621 | ||
622 | static inline void print_modules(void) | |
623 | { | |
624 | } | |
ef665c1a RD |
625 | #endif /* CONFIG_MODULES */ |
626 | ||
ef665c1a | 627 | #ifdef CONFIG_SYSFS |
7405c1e1 GKH |
628 | extern struct kset *module_kset; |
629 | extern struct kobj_type module_ktype; | |
630 | extern int module_sysfs_initialized; | |
ef665c1a RD |
631 | #endif /* CONFIG_SYSFS */ |
632 | ||
1da177e4 LT |
633 | #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 | ||
1da177e4 LT |
637 | #define __MODULE_STRING(x) __stringify(x) |
638 | ||
84e1c6bb MC |
639 | #ifdef CONFIG_DEBUG_SET_MODULE_RONX |
640 | extern void set_all_modules_text_rw(void); | |
641 | extern void set_all_modules_text_ro(void); | |
642 | #else | |
643 | static inline void set_all_modules_text_rw(void) { } | |
644 | static inline void set_all_modules_text_ro(void) { } | |
645 | #endif | |
0d9c25dd AM |
646 | |
647 | #ifdef CONFIG_GENERIC_BUG | |
5336377d | 648 | void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, |
0d9c25dd AM |
649 | struct module *); |
650 | void module_bug_cleanup(struct module *); | |
651 | ||
652 | #else /* !CONFIG_GENERIC_BUG */ | |
653 | ||
5336377d | 654 | static inline void module_bug_finalize(const Elf_Ehdr *hdr, |
0d9c25dd AM |
655 | const Elf_Shdr *sechdrs, |
656 | struct module *mod) | |
657 | { | |
0d9c25dd AM |
658 | } |
659 | static inline void module_bug_cleanup(struct module *mod) {} | |
660 | #endif /* CONFIG_GENERIC_BUG */ | |
661 | ||
1da177e4 | 662 | #endif /* _LINUX_MODULE_H */ |