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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> | |
b2e285fc | 18 | #include <linux/jump_label.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 | |
e865d06b | 32 | struct modversion_info { |
1da177e4 LT |
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; | |
942e4431 | 44 | struct completion *kobj_completion; |
4befb026 KS |
45 | }; |
46 | ||
1da177e4 | 47 | struct module_attribute { |
4befb026 KS |
48 | struct attribute attr; |
49 | ssize_t (*show)(struct module_attribute *, struct module_kobject *, | |
50 | char *); | |
51 | ssize_t (*store)(struct module_attribute *, struct module_kobject *, | |
1da177e4 | 52 | const char *, size_t count); |
c988d2b2 MD |
53 | void (*setup)(struct module *, const char *); |
54 | int (*test)(struct module *); | |
55 | void (*free)(struct module *); | |
1da177e4 LT |
56 | }; |
57 | ||
e94965ed DT |
58 | struct module_version_attribute { |
59 | struct module_attribute mattr; | |
60 | const char *module_name; | |
61 | const char *version; | |
98562ad8 | 62 | } __attribute__ ((__aligned__(sizeof(void *)))); |
e94965ed | 63 | |
9b73a584 | 64 | extern ssize_t __modver_version_show(struct module_attribute *, |
4befb026 | 65 | struct module_kobject *, char *); |
9b73a584 | 66 | |
88bfa324 | 67 | extern struct module_attribute module_uevent; |
1da177e4 LT |
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 | /* Generic info of form tag = "info" */ |
86 | #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) | |
87 | ||
88 | /* For userspace: you can also call me... */ | |
89 | #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias) | |
90 | ||
7cb14ba7 AR |
91 | /* Soft module dependencies. See man modprobe.d for details. |
92 | * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz") | |
93 | */ | |
94 | #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep) | |
95 | ||
1da177e4 LT |
96 | /* |
97 | * The following license idents are currently accepted as indicating free | |
98 | * software modules | |
99 | * | |
100 | * "GPL" [GNU Public License v2 or later] | |
101 | * "GPL v2" [GNU Public License v2] | |
102 | * "GPL and additional rights" [GNU Public License v2 rights and more] | |
103 | * "Dual BSD/GPL" [GNU Public License v2 | |
104 | * or BSD license choice] | |
8d27e908 XVP |
105 | * "Dual MIT/GPL" [GNU Public License v2 |
106 | * or MIT license choice] | |
1da177e4 LT |
107 | * "Dual MPL/GPL" [GNU Public License v2 |
108 | * or Mozilla license choice] | |
109 | * | |
110 | * The following other idents are available | |
111 | * | |
112 | * "Proprietary" [Non free products] | |
113 | * | |
114 | * There are dual licensed components, but when running with Linux it is the | |
115 | * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL | |
116 | * is a GPL combined work. | |
117 | * | |
118 | * This exists for several reasons | |
e865d06b | 119 | * 1. So modinfo can show license info for users wanting to vet their setup |
1da177e4 LT |
120 | * is free |
121 | * 2. So the community can ignore bug reports including proprietary modules | |
122 | * 3. So vendors can do likewise based on their own policies | |
123 | */ | |
124 | #define MODULE_LICENSE(_license) MODULE_INFO(license, _license) | |
125 | ||
1d7015ca JB |
126 | /* |
127 | * Author(s), use "Name <email>" or just "Name", for multiple | |
128 | * authors use multiple MODULE_AUTHOR() statements/lines. | |
129 | */ | |
1da177e4 | 130 | #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) |
e865d06b | 131 | |
1da177e4 LT |
132 | /* What your module does. */ |
133 | #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) | |
134 | ||
cff26a51 RR |
135 | #ifdef MODULE |
136 | /* Creates an alias so file2alias.c can find device table. */ | |
137 | #define MODULE_DEVICE_TABLE(type, name) \ | |
138 | extern const struct type##_device_id __mod_##type##__##name##_device_table \ | |
139 | __attribute__ ((unused, alias(__stringify(name)))) | |
140 | #else /* !MODULE */ | |
141 | #define MODULE_DEVICE_TABLE(type, name) | |
142 | #endif | |
1da177e4 LT |
143 | |
144 | /* Version of form [<epoch>:]<version>[-<extra-version>]. | |
e865d06b SL |
145 | * Or for CVS/RCS ID version, everything but the number is stripped. |
146 | * <epoch>: A (small) unsigned integer which allows you to start versions | |
147 | * anew. If not mentioned, it's zero. eg. "2:1.0" is after | |
148 | * "1:2.0". | |
149 | ||
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 | ||
154 | * <extraversion>: Like <version>, but inserted for local | |
155 | * customizations, eg "rh3" or "rusty1". | |
156 | ||
157 | * Using this automatically adds a checksum of the .c files and the | |
158 | * local headers in "srcversion". | |
159 | */ | |
e94965ed | 160 | |
3b90a5b2 | 161 | #if defined(MODULE) || !defined(CONFIG_SYSFS) |
1da177e4 | 162 | #define MODULE_VERSION(_version) MODULE_INFO(version, _version) |
e94965ed DT |
163 | #else |
164 | #define MODULE_VERSION(_version) \ | |
b4bc8428 | 165 | static struct module_version_attribute ___modver_attr = { \ |
e94965ed DT |
166 | .mattr = { \ |
167 | .attr = { \ | |
168 | .name = "version", \ | |
169 | .mode = S_IRUGO, \ | |
170 | }, \ | |
171 | .show = __modver_version_show, \ | |
172 | }, \ | |
173 | .module_name = KBUILD_MODNAME, \ | |
174 | .version = _version, \ | |
b4bc8428 DT |
175 | }; \ |
176 | static const struct module_version_attribute \ | |
177 | __used __attribute__ ((__section__ ("__modver"))) \ | |
178 | * __moduleparam_const __modver_attr = &___modver_attr | |
e94965ed | 179 | #endif |
1da177e4 | 180 | |
187afbed JM |
181 | /* Optional firmware file (or files) needed by the module |
182 | * format is simply firmware file name. Multiple firmware | |
183 | * files require multiple MODULE_FIRMWARE() specifiers */ | |
184 | #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) | |
185 | ||
1da177e4 LT |
186 | /* Given an address, look for it in the exception tables */ |
187 | const struct exception_table_entry *search_exception_tables(unsigned long add); | |
188 | ||
189 | struct notifier_block; | |
190 | ||
191 | #ifdef CONFIG_MODULES | |
192 | ||
5ed10910 | 193 | extern int modules_disabled; /* for sysctl */ |
1da177e4 LT |
194 | /* Get/put a kernel symbol (calls must be symmetric) */ |
195 | void *__symbol_get(const char *symbol); | |
196 | void *__symbol_get_gpl(const char *symbol); | |
b92021b0 | 197 | #define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x)))) |
1da177e4 | 198 | |
c8e21ced RR |
199 | /* modules using other modules: kdb wants to see this. */ |
200 | struct module_use { | |
201 | struct list_head source_list; | |
202 | struct list_head target_list; | |
203 | struct module *source, *target; | |
204 | }; | |
205 | ||
0d21b0e3 RR |
206 | enum module_state { |
207 | MODULE_STATE_LIVE, /* Normal state. */ | |
208 | MODULE_STATE_COMING, /* Full formed, running module_init. */ | |
209 | MODULE_STATE_GOING, /* Going away. */ | |
210 | MODULE_STATE_UNFORMED, /* Still setting it up. */ | |
1da177e4 LT |
211 | }; |
212 | ||
bd77c047 ED |
213 | /** |
214 | * struct module_ref - per cpu module reference counts | |
215 | * @incs: number of module get on this cpu | |
216 | * @decs: number of module put on this cpu | |
217 | * | |
218 | * We force an alignment on 8 or 16 bytes, so that alloc_percpu() | |
219 | * put @incs/@decs in same cache line, with no extra memory cost, | |
220 | * since alloc_percpu() is fine grained. | |
221 | */ | |
222 | struct module_ref { | |
223 | unsigned long incs; | |
224 | unsigned long decs; | |
225 | } __attribute((aligned(2 * sizeof(unsigned long)))); | |
226 | ||
e865d06b | 227 | struct module { |
1da177e4 LT |
228 | enum module_state state; |
229 | ||
230 | /* Member of list of modules */ | |
231 | struct list_head list; | |
232 | ||
233 | /* Unique handle for this module */ | |
234 | char name[MODULE_NAME_LEN]; | |
235 | ||
236 | /* Sysfs stuff. */ | |
237 | struct module_kobject mkobj; | |
03e88ae1 | 238 | struct module_attribute *modinfo_attrs; |
c988d2b2 MD |
239 | const char *version; |
240 | const char *srcversion; | |
270a6c4c | 241 | struct kobject *holders_dir; |
1da177e4 LT |
242 | |
243 | /* Exported symbols */ | |
244 | const struct kernel_symbol *syms; | |
1da177e4 | 245 | const unsigned long *crcs; |
af540689 | 246 | unsigned int num_syms; |
1da177e4 | 247 | |
e180a6b7 RR |
248 | /* Kernel parameters. */ |
249 | struct kernel_param *kp; | |
250 | unsigned int num_kp; | |
251 | ||
1da177e4 | 252 | /* GPL-only exported symbols. */ |
1da177e4 | 253 | unsigned int num_gpl_syms; |
af540689 | 254 | const struct kernel_symbol *gpl_syms; |
1da177e4 LT |
255 | const unsigned long *gpl_crcs; |
256 | ||
f7f5b675 | 257 | #ifdef CONFIG_UNUSED_SYMBOLS |
f71d20e9 AV |
258 | /* unused exported symbols. */ |
259 | const struct kernel_symbol *unused_syms; | |
f71d20e9 | 260 | const unsigned long *unused_crcs; |
af540689 RK |
261 | unsigned int num_unused_syms; |
262 | ||
f71d20e9 | 263 | /* GPL-only, unused exported symbols. */ |
f71d20e9 | 264 | unsigned int num_unused_gpl_syms; |
af540689 | 265 | const struct kernel_symbol *unused_gpl_syms; |
f71d20e9 | 266 | const unsigned long *unused_gpl_crcs; |
f7f5b675 | 267 | #endif |
f71d20e9 | 268 | |
106a4ee2 RR |
269 | #ifdef CONFIG_MODULE_SIG |
270 | /* Signature was verified. */ | |
271 | bool sig_ok; | |
272 | #endif | |
273 | ||
9f28bb7e GKH |
274 | /* symbols that will be GPL-only in the near future. */ |
275 | const struct kernel_symbol *gpl_future_syms; | |
9f28bb7e | 276 | const unsigned long *gpl_future_crcs; |
af540689 | 277 | unsigned int num_gpl_future_syms; |
9f28bb7e | 278 | |
1da177e4 LT |
279 | /* Exception table */ |
280 | unsigned int num_exentries; | |
5e458cc0 | 281 | struct exception_table_entry *extable; |
1da177e4 LT |
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 */ | |
2f0f2a33 | 293 | unsigned int init_size, core_size; |
1da177e4 LT |
294 | |
295 | /* The size of the executable code in each section. */ | |
2f0f2a33 | 296 | unsigned int init_text_size, core_text_size; |
1da177e4 | 297 | |
84e1c6bb MC |
298 | /* Size of RO sections of the module (text+rodata) */ |
299 | unsigned int init_ro_size, core_ro_size; | |
300 | ||
1da177e4 LT |
301 | /* Arch-specific module values */ |
302 | struct mod_arch_specific arch; | |
303 | ||
2bc2d61a RD |
304 | unsigned int taints; /* same bits as kernel:tainted */ |
305 | ||
7664c5a1 JF |
306 | #ifdef CONFIG_GENERIC_BUG |
307 | /* Support for BUG */ | |
af540689 | 308 | unsigned num_bugs; |
7664c5a1 JF |
309 | struct list_head bug_list; |
310 | struct bug_entry *bug_table; | |
1da177e4 LT |
311 | #endif |
312 | ||
313 | #ifdef CONFIG_KALLSYMS | |
4a496226 JB |
314 | /* |
315 | * We keep the symbol and string tables for kallsyms. | |
316 | * The core_* fields below are temporary, loader-only (they | |
317 | * could really be discarded after module init). | |
318 | */ | |
319 | Elf_Sym *symtab, *core_symtab; | |
320 | unsigned int num_symtab, core_num_syms; | |
554bdfe5 | 321 | char *strtab, *core_strtab; |
1da177e4 LT |
322 | |
323 | /* Section attributes */ | |
324 | struct module_sect_attrs *sect_attrs; | |
6d760133 RM |
325 | |
326 | /* Notes attributes */ | |
327 | struct module_notes_attrs *notes_attrs; | |
1da177e4 LT |
328 | #endif |
329 | ||
a288bd65 RK |
330 | /* The command line arguments (may be mangled). People like |
331 | keeping pointers to this stuff */ | |
332 | char *args; | |
333 | ||
259354de | 334 | #ifdef CONFIG_SMP |
1da177e4 | 335 | /* Per-cpu data. */ |
259354de TH |
336 | void __percpu *percpu; |
337 | unsigned int percpu_size; | |
338 | #endif | |
1da177e4 | 339 | |
97e1c18e | 340 | #ifdef CONFIG_TRACEPOINTS |
97e1c18e | 341 | unsigned int num_tracepoints; |
a288bd65 | 342 | struct tracepoint * const *tracepoints_ptrs; |
97e1c18e | 343 | #endif |
bf5438fc JB |
344 | #ifdef HAVE_JUMP_LABEL |
345 | struct jump_entry *jump_entries; | |
346 | unsigned int num_jump_entries; | |
347 | #endif | |
769b0441 | 348 | #ifdef CONFIG_TRACING |
1ba28e02 | 349 | unsigned int num_trace_bprintk_fmt; |
a288bd65 | 350 | const char **trace_bprintk_fmt_start; |
1ba28e02 | 351 | #endif |
6d723736 | 352 | #ifdef CONFIG_EVENT_TRACING |
e4a9ea5e | 353 | struct ftrace_event_call **trace_events; |
6d723736 SR |
354 | unsigned int num_trace_events; |
355 | #endif | |
93eb677d | 356 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
93eb677d | 357 | unsigned int num_ftrace_callsites; |
a288bd65 | 358 | unsigned long *ftrace_callsites; |
93eb677d | 359 | #endif |
1ba28e02 | 360 | |
af540689 RK |
361 | #ifdef CONFIG_MODULE_UNLOAD |
362 | /* What modules depend on me? */ | |
2c02dfe7 LT |
363 | struct list_head source_list; |
364 | /* What modules do I depend on? */ | |
365 | struct list_head target_list; | |
af540689 | 366 | |
af540689 RK |
367 | /* Destruction function. */ |
368 | void (*exit)(void); | |
369 | ||
bd77c047 | 370 | struct module_ref __percpu *refptr; |
af540689 | 371 | #endif |
b99b87f7 PO |
372 | |
373 | #ifdef CONFIG_CONSTRUCTORS | |
374 | /* Constructor functions. */ | |
375 | ctor_fn_t *ctors; | |
376 | unsigned int num_ctors; | |
377 | #endif | |
1da177e4 | 378 | }; |
e61a1c1c RZ |
379 | #ifndef MODULE_ARCH_INIT |
380 | #define MODULE_ARCH_INIT {} | |
381 | #endif | |
1da177e4 | 382 | |
c6b37801 TA |
383 | extern struct mutex module_mutex; |
384 | ||
1da177e4 LT |
385 | /* FIXME: It'd be nice to isolate modules during init, too, so they |
386 | aren't used before they (may) fail. But presently too much code | |
387 | (IDE & SCSI) require entry into the module during init.*/ | |
388 | static inline int module_is_live(struct module *mod) | |
389 | { | |
390 | return mod->state != MODULE_STATE_GOING; | |
391 | } | |
392 | ||
1da177e4 | 393 | struct module *__module_text_address(unsigned long addr); |
e610499e RR |
394 | struct module *__module_address(unsigned long addr); |
395 | bool is_module_address(unsigned long addr); | |
10fad5e4 | 396 | bool is_module_percpu_address(unsigned long addr); |
e610499e | 397 | bool is_module_text_address(unsigned long addr); |
1da177e4 | 398 | |
76681c8f PM |
399 | static inline bool within_module_core(unsigned long addr, |
400 | const struct module *mod) | |
a06f6211 MH |
401 | { |
402 | return (unsigned long)mod->module_core <= addr && | |
403 | addr < (unsigned long)mod->module_core + mod->core_size; | |
404 | } | |
405 | ||
76681c8f PM |
406 | static inline bool within_module_init(unsigned long addr, |
407 | const struct module *mod) | |
a06f6211 MH |
408 | { |
409 | return (unsigned long)mod->module_init <= addr && | |
410 | addr < (unsigned long)mod->module_init + mod->init_size; | |
411 | } | |
412 | ||
76681c8f | 413 | static inline bool within_module(unsigned long addr, const struct module *mod) |
9b20a352 PM |
414 | { |
415 | return within_module_init(addr, mod) || within_module_core(addr, mod); | |
416 | } | |
417 | ||
c6b37801 TA |
418 | /* Search for module by name: must hold module_mutex. */ |
419 | struct module *find_module(const char *name); | |
420 | ||
421 | struct symsearch { | |
422 | const struct kernel_symbol *start, *stop; | |
423 | const unsigned long *crcs; | |
424 | enum { | |
425 | NOT_GPL_ONLY, | |
426 | GPL_ONLY, | |
427 | WILL_BE_GPL_ONLY, | |
428 | } licence; | |
429 | bool unused; | |
430 | }; | |
431 | ||
432 | /* Search for an exported symbol by name. */ | |
433 | const struct kernel_symbol *find_symbol(const char *name, | |
434 | struct module **owner, | |
435 | const unsigned long **crc, | |
436 | bool gplok, | |
437 | bool warn); | |
438 | ||
439 | /* Walk the exported symbol table */ | |
de4d8d53 RR |
440 | bool each_symbol_section(bool (*fn)(const struct symsearch *arr, |
441 | struct module *owner, | |
442 | void *data), void *data); | |
c6b37801 | 443 | |
ea07890a | 444 | /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if |
1da177e4 | 445 | symnum out of range. */ |
ea07890a AD |
446 | int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, |
447 | char *name, char *module_name, int *exported); | |
1da177e4 LT |
448 | |
449 | /* Look for this name: can be of form module:name. */ | |
450 | unsigned long module_kallsyms_lookup_name(const char *name); | |
451 | ||
75a66614 AK |
452 | int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
453 | struct module *, unsigned long), | |
454 | void *data); | |
455 | ||
1da177e4 LT |
456 | extern void __module_put_and_exit(struct module *mod, long code) |
457 | __attribute__((noreturn)); | |
74e22fac | 458 | #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code) |
1da177e4 LT |
459 | |
460 | #ifdef CONFIG_MODULE_UNLOAD | |
bd77c047 | 461 | unsigned long module_refcount(struct module *mod); |
1da177e4 | 462 | void __symbol_put(const char *symbol); |
b92021b0 | 463 | #define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x)) |
1da177e4 LT |
464 | void symbol_put_addr(void *addr); |
465 | ||
466 | /* Sometimes we know we already have a refcount, and it's easier not | |
467 | to handle the error case (which only happens with rmmod --wait). */ | |
d53799be | 468 | extern void __module_get(struct module *module); |
e1783a24 | 469 | |
d53799be SR |
470 | /* This is the Right Way to get a module: if it fails, it's being removed, |
471 | * so pretend it's not there. */ | |
472 | extern bool try_module_get(struct module *module); | |
1da177e4 | 473 | |
f6a57033 | 474 | extern void module_put(struct module *module); |
1da177e4 LT |
475 | |
476 | #else /*!CONFIG_MODULE_UNLOAD*/ | |
477 | static inline int try_module_get(struct module *module) | |
478 | { | |
479 | return !module || module_is_live(module); | |
480 | } | |
481 | static inline void module_put(struct module *module) | |
482 | { | |
483 | } | |
484 | static inline void __module_get(struct module *module) | |
485 | { | |
486 | } | |
e865d06b SL |
487 | #define symbol_put(x) do { } while (0) |
488 | #define symbol_put_addr(p) do { } while (0) | |
1da177e4 LT |
489 | |
490 | #endif /* CONFIG_MODULE_UNLOAD */ | |
dfd62d1d | 491 | int ref_module(struct module *a, struct module *b); |
1da177e4 LT |
492 | |
493 | /* This is a #define so the string doesn't get put in every .o file */ | |
494 | #define module_name(mod) \ | |
495 | ({ \ | |
496 | struct module *__mod = (mod); \ | |
497 | __mod ? __mod->name : "kernel"; \ | |
498 | }) | |
499 | ||
6dd06c9f RR |
500 | /* For kallsyms to ask for address resolution. namebuf should be at |
501 | * least KSYM_NAME_LEN long: a pointer to namebuf is returned if | |
502 | * found, otherwise NULL. */ | |
92dfc9dc | 503 | const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
504 | unsigned long *symbolsize, |
505 | unsigned long *offset, | |
506 | char **modname, | |
507 | char *namebuf); | |
9d65cb4a | 508 | int lookup_module_symbol_name(unsigned long addr, char *symname); |
a5c43dae | 509 | int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); |
1da177e4 LT |
510 | |
511 | /* For extable.c to search modules' exception tables. */ | |
512 | const struct exception_table_entry *search_module_extables(unsigned long addr); | |
513 | ||
e865d06b SL |
514 | int register_module_notifier(struct notifier_block *nb); |
515 | int unregister_module_notifier(struct notifier_block *nb); | |
1da177e4 LT |
516 | |
517 | extern void print_modules(void); | |
518 | ||
1da177e4 | 519 | #else /* !CONFIG_MODULES... */ |
1da177e4 LT |
520 | |
521 | /* Given an address, look for it in the exception tables. */ | |
522 | static inline const struct exception_table_entry * | |
523 | search_module_extables(unsigned long addr) | |
524 | { | |
525 | return NULL; | |
526 | } | |
527 | ||
e610499e RR |
528 | static inline struct module *__module_address(unsigned long addr) |
529 | { | |
530 | return NULL; | |
531 | } | |
532 | ||
1da177e4 LT |
533 | static inline struct module *__module_text_address(unsigned long addr) |
534 | { | |
535 | return NULL; | |
536 | } | |
537 | ||
e610499e RR |
538 | static inline bool is_module_address(unsigned long addr) |
539 | { | |
540 | return false; | |
541 | } | |
542 | ||
d5e50daf RD |
543 | static inline bool is_module_percpu_address(unsigned long addr) |
544 | { | |
545 | return false; | |
546 | } | |
547 | ||
e610499e | 548 | static inline bool is_module_text_address(unsigned long addr) |
4d435f9d | 549 | { |
e610499e | 550 | return false; |
4d435f9d IM |
551 | } |
552 | ||
1da177e4 LT |
553 | /* Get/put a kernel symbol (calls should be symmetric) */ |
554 | #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); }) | |
e865d06b SL |
555 | #define symbol_put(x) do { } while (0) |
556 | #define symbol_put_addr(x) do { } while (0) | |
1da177e4 LT |
557 | |
558 | static inline void __module_get(struct module *module) | |
559 | { | |
560 | } | |
561 | ||
562 | static inline int try_module_get(struct module *module) | |
563 | { | |
564 | return 1; | |
565 | } | |
566 | ||
567 | static inline void module_put(struct module *module) | |
568 | { | |
569 | } | |
570 | ||
571 | #define module_name(mod) "kernel" | |
572 | ||
1da177e4 | 573 | /* For kallsyms to ask for address resolution. NULL means not found. */ |
92dfc9dc | 574 | static inline const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
575 | unsigned long *symbolsize, |
576 | unsigned long *offset, | |
577 | char **modname, | |
578 | char *namebuf) | |
1da177e4 LT |
579 | { |
580 | return NULL; | |
581 | } | |
582 | ||
9d65cb4a AD |
583 | static inline int lookup_module_symbol_name(unsigned long addr, char *symname) |
584 | { | |
585 | return -ERANGE; | |
586 | } | |
587 | ||
a5c43dae AD |
588 | static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) |
589 | { | |
590 | return -ERANGE; | |
591 | } | |
592 | ||
ea07890a AD |
593 | static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, |
594 | char *type, char *name, | |
595 | char *module_name, int *exported) | |
1da177e4 | 596 | { |
ea07890a | 597 | return -ERANGE; |
1da177e4 LT |
598 | } |
599 | ||
600 | static inline unsigned long module_kallsyms_lookup_name(const char *name) | |
601 | { | |
602 | return 0; | |
603 | } | |
604 | ||
75a66614 AK |
605 | static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
606 | struct module *, | |
607 | unsigned long), | |
608 | void *data) | |
609 | { | |
610 | return 0; | |
611 | } | |
612 | ||
e865d06b | 613 | static inline int register_module_notifier(struct notifier_block *nb) |
1da177e4 LT |
614 | { |
615 | /* no events will happen anyway, so this can always succeed */ | |
616 | return 0; | |
617 | } | |
618 | ||
e865d06b | 619 | static inline int unregister_module_notifier(struct notifier_block *nb) |
1da177e4 LT |
620 | { |
621 | return 0; | |
622 | } | |
623 | ||
624 | #define module_put_and_exit(code) do_exit(code) | |
625 | ||
626 | static inline void print_modules(void) | |
627 | { | |
628 | } | |
ef665c1a RD |
629 | #endif /* CONFIG_MODULES */ |
630 | ||
ef665c1a | 631 | #ifdef CONFIG_SYSFS |
7405c1e1 GKH |
632 | extern struct kset *module_kset; |
633 | extern struct kobj_type module_ktype; | |
634 | extern int module_sysfs_initialized; | |
ef665c1a RD |
635 | #endif /* CONFIG_SYSFS */ |
636 | ||
1da177e4 LT |
637 | #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) |
638 | ||
639 | /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ | |
640 | ||
1da177e4 LT |
641 | #define __MODULE_STRING(x) __stringify(x) |
642 | ||
84e1c6bb MC |
643 | #ifdef CONFIG_DEBUG_SET_MODULE_RONX |
644 | extern void set_all_modules_text_rw(void); | |
645 | extern void set_all_modules_text_ro(void); | |
646 | #else | |
647 | static inline void set_all_modules_text_rw(void) { } | |
648 | static inline void set_all_modules_text_ro(void) { } | |
649 | #endif | |
0d9c25dd AM |
650 | |
651 | #ifdef CONFIG_GENERIC_BUG | |
5336377d | 652 | void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, |
0d9c25dd AM |
653 | struct module *); |
654 | void module_bug_cleanup(struct module *); | |
655 | ||
656 | #else /* !CONFIG_GENERIC_BUG */ | |
657 | ||
5336377d | 658 | static inline void module_bug_finalize(const Elf_Ehdr *hdr, |
0d9c25dd AM |
659 | const Elf_Shdr *sechdrs, |
660 | struct module *mod) | |
661 | { | |
0d9c25dd AM |
662 | } |
663 | static inline void module_bug_cleanup(struct module *mod) {} | |
664 | #endif /* CONFIG_GENERIC_BUG */ | |
665 | ||
1da177e4 | 666 | #endif /* _LINUX_MODULE_H */ |