~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/linux/module.h

Version: ~ [ linux-5.2-rc1 ] ~ [ linux-5.1.2 ] ~ [ linux-5.0.16 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.43 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.119 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.176 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.179 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.139 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.67 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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/init.h>
 15 #include <linux/elf.h>
 16 #include <linux/stringify.h>
 17 #include <linux/kobject.h>
 18 #include <linux/moduleparam.h>
 19 #include <linux/jump_label.h>
 20 #include <linux/export.h>
 21 #include <linux/rbtree_latch.h>
 22 
 23 #include <linux/percpu.h>
 24 #include <asm/module.h>
 25 
 26 /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */
 27 #define MODULE_SIG_STRING "~Module signature appended~\n"
 28 
 29 /* Not Yet Implemented */
 30 #define MODULE_SUPPORTED_DEVICE(name)
 31 
 32 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
 33 
 34 struct modversion_info {
 35         unsigned long crc;
 36         char name[MODULE_NAME_LEN];
 37 };
 38 
 39 struct module;
 40 
 41 struct module_kobject {
 42         struct kobject kobj;
 43         struct module *mod;
 44         struct kobject *drivers_dir;
 45         struct module_param_attrs *mp;
 46         struct completion *kobj_completion;
 47 };
 48 
 49 struct module_attribute {
 50         struct attribute attr;
 51         ssize_t (*show)(struct module_attribute *, struct module_kobject *,
 52                         char *);
 53         ssize_t (*store)(struct module_attribute *, struct module_kobject *,
 54                          const char *, size_t count);
 55         void (*setup)(struct module *, const char *);
 56         int (*test)(struct module *);
 57         void (*free)(struct module *);
 58 };
 59 
 60 struct module_version_attribute {
 61         struct module_attribute mattr;
 62         const char *module_name;
 63         const char *version;
 64 } __attribute__ ((__aligned__(sizeof(void *))));
 65 
 66 extern ssize_t __modver_version_show(struct module_attribute *,
 67                                      struct module_kobject *, char *);
 68 
 69 extern struct module_attribute module_uevent;
 70 
 71 /* These are either module local, or the kernel's dummy ones. */
 72 extern int init_module(void);
 73 extern void cleanup_module(void);
 74 
 75 #ifndef MODULE
 76 /**
 77  * module_init() - driver initialization entry point
 78  * @x: function to be run at kernel boot time or module insertion
 79  *
 80  * module_init() will either be called during do_initcalls() (if
 81  * builtin) or at module insertion time (if a module).  There can only
 82  * be one per module.
 83  */
 84 #define module_init(x)  __initcall(x);
 85 
 86 /**
 87  * module_exit() - driver exit entry point
 88  * @x: function to be run when driver is removed
 89  *
 90  * module_exit() will wrap the driver clean-up code
 91  * with cleanup_module() when used with rmmod when
 92  * the driver is a module.  If the driver is statically
 93  * compiled into the kernel, module_exit() has no effect.
 94  * There can only be one per module.
 95  */
 96 #define module_exit(x)  __exitcall(x);
 97 
 98 #else /* MODULE */
 99 
100 /*
101  * In most cases loadable modules do not need custom
102  * initcall levels. There are still some valid cases where
103  * a driver may be needed early if built in, and does not
104  * matter when built as a loadable module. Like bus
105  * snooping debug drivers.
106  */
107 #define early_initcall(fn)              module_init(fn)
108 #define core_initcall(fn)               module_init(fn)
109 #define core_initcall_sync(fn)          module_init(fn)
110 #define postcore_initcall(fn)           module_init(fn)
111 #define postcore_initcall_sync(fn)      module_init(fn)
112 #define arch_initcall(fn)               module_init(fn)
113 #define subsys_initcall(fn)             module_init(fn)
114 #define subsys_initcall_sync(fn)        module_init(fn)
115 #define fs_initcall(fn)                 module_init(fn)
116 #define fs_initcall_sync(fn)            module_init(fn)
117 #define rootfs_initcall(fn)             module_init(fn)
118 #define device_initcall(fn)             module_init(fn)
119 #define device_initcall_sync(fn)        module_init(fn)
120 #define late_initcall(fn)               module_init(fn)
121 #define late_initcall_sync(fn)          module_init(fn)
122 
123 #define console_initcall(fn)            module_init(fn)
124 #define security_initcall(fn)           module_init(fn)
125 
126 /* Each module must use one module_init(). */
127 #define module_init(initfn)                                     \
128         static inline initcall_t __inittest(void)               \
129         { return initfn; }                                      \
130         int init_module(void) __attribute__((alias(#initfn)));
131 
132 /* This is only required if you want to be unloadable. */
133 #define module_exit(exitfn)                                     \
134         static inline exitcall_t __exittest(void)               \
135         { return exitfn; }                                      \
136         void cleanup_module(void) __attribute__((alias(#exitfn)));
137 
138 #endif
139 
140 /* This means "can be init if no module support, otherwise module load
141    may call it." */
142 #ifdef CONFIG_MODULES
143 #define __init_or_module
144 #define __initdata_or_module
145 #define __initconst_or_module
146 #define __INIT_OR_MODULE        .text
147 #define __INITDATA_OR_MODULE    .data
148 #define __INITRODATA_OR_MODULE  .section ".rodata","a",%progbits
149 #else
150 #define __init_or_module __init
151 #define __initdata_or_module __initdata
152 #define __initconst_or_module __initconst
153 #define __INIT_OR_MODULE __INIT
154 #define __INITDATA_OR_MODULE __INITDATA
155 #define __INITRODATA_OR_MODULE __INITRODATA
156 #endif /*CONFIG_MODULES*/
157 
158 /* Archs provide a method of finding the correct exception table. */
159 struct exception_table_entry;
160 
161 const struct exception_table_entry *
162 search_extable(const struct exception_table_entry *first,
163                const struct exception_table_entry *last,
164                unsigned long value);
165 void sort_extable(struct exception_table_entry *start,
166                   struct exception_table_entry *finish);
167 void sort_main_extable(void);
168 void trim_init_extable(struct module *m);
169 
170 /* Generic info of form tag = "info" */
171 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
172 
173 /* For userspace: you can also call me... */
174 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
175 
176 /* Soft module dependencies. See man modprobe.d for details.
177  * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz")
178  */
179 #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep)
180 
181 /*
182  * The following license idents are currently accepted as indicating free
183  * software modules
184  *
185  *      "GPL"                           [GNU Public License v2 or later]
186  *      "GPL v2"                        [GNU Public License v2]
187  *      "GPL and additional rights"     [GNU Public License v2 rights and more]
188  *      "Dual BSD/GPL"                  [GNU Public License v2
189  *                                       or BSD license choice]
190  *      "Dual MIT/GPL"                  [GNU Public License v2
191  *                                       or MIT license choice]
192  *      "Dual MPL/GPL"                  [GNU Public License v2
193  *                                       or Mozilla license choice]
194  *
195  * The following other idents are available
196  *
197  *      "Proprietary"                   [Non free products]
198  *
199  * There are dual licensed components, but when running with Linux it is the
200  * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
201  * is a GPL combined work.
202  *
203  * This exists for several reasons
204  * 1.   So modinfo can show license info for users wanting to vet their setup
205  *      is free
206  * 2.   So the community can ignore bug reports including proprietary modules
207  * 3.   So vendors can do likewise based on their own policies
208  */
209 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
210 
211 /*
212  * Author(s), use "Name <email>" or just "Name", for multiple
213  * authors use multiple MODULE_AUTHOR() statements/lines.
214  */
215 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
216 
217 /* What your module does. */
218 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
219 
220 #ifdef MODULE
221 /* Creates an alias so file2alias.c can find device table. */
222 #define MODULE_DEVICE_TABLE(type, name)                                 \
223 extern const typeof(name) __mod_##type##__##name##_device_table         \
224   __attribute__ ((unused, alias(__stringify(name))))
225 #else  /* !MODULE */
226 #define MODULE_DEVICE_TABLE(type, name)
227 #endif
228 
229 /* Version of form [<epoch>:]<version>[-<extra-version>].
230  * Or for CVS/RCS ID version, everything but the number is stripped.
231  * <epoch>: A (small) unsigned integer which allows you to start versions
232  * anew. If not mentioned, it's zero.  eg. "2:1.0" is after
233  * "1:2.0".
234 
235  * <version>: The <version> may contain only alphanumerics and the
236  * character `.'.  Ordered by numeric sort for numeric parts,
237  * ascii sort for ascii parts (as per RPM or DEB algorithm).
238 
239  * <extraversion>: Like <version>, but inserted for local
240  * customizations, eg "rh3" or "rusty1".
241 
242  * Using this automatically adds a checksum of the .c files and the
243  * local headers in "srcversion".
244  */
245 
246 #if defined(MODULE) || !defined(CONFIG_SYSFS)
247 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
248 #else
249 #define MODULE_VERSION(_version)                                        \
250         static struct module_version_attribute ___modver_attr = {       \
251                 .mattr  = {                                             \
252                         .attr   = {                                     \
253                                 .name   = "version",                    \
254                                 .mode   = S_IRUGO,                      \
255                         },                                              \
256                         .show   = __modver_version_show,                \
257                 },                                                      \
258                 .module_name    = KBUILD_MODNAME,                       \
259                 .version        = _version,                             \
260         };                                                              \
261         static const struct module_version_attribute                    \
262         __used __attribute__ ((__section__ ("__modver")))               \
263         * __moduleparam_const __modver_attr = &___modver_attr
264 #endif
265 
266 /* Optional firmware file (or files) needed by the module
267  * format is simply firmware file name.  Multiple firmware
268  * files require multiple MODULE_FIRMWARE() specifiers */
269 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
270 
271 /* Given an address, look for it in the exception tables */
272 const struct exception_table_entry *search_exception_tables(unsigned long add);
273 
274 struct notifier_block;
275 
276 #ifdef CONFIG_MODULES
277 
278 extern int modules_disabled; /* for sysctl */
279 /* Get/put a kernel symbol (calls must be symmetric) */
280 void *__symbol_get(const char *symbol);
281 void *__symbol_get_gpl(const char *symbol);
282 #define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x))))
283 
284 /* modules using other modules: kdb wants to see this. */
285 struct module_use {
286         struct list_head source_list;
287         struct list_head target_list;
288         struct module *source, *target;
289 };
290 
291 enum module_state {
292         MODULE_STATE_LIVE,      /* Normal state. */
293         MODULE_STATE_COMING,    /* Full formed, running module_init. */
294         MODULE_STATE_GOING,     /* Going away. */
295         MODULE_STATE_UNFORMED,  /* Still setting it up. */
296 };
297 
298 struct module;
299 
300 struct mod_tree_node {
301         struct module *mod;
302         struct latch_tree_node node;
303 };
304 
305 struct module_layout {
306         /* The actual code + data. */
307         void *base;
308         /* Total size. */
309         unsigned int size;
310         /* The size of the executable code.  */
311         unsigned int text_size;
312         /* Size of RO section of the module (text+rodata) */
313         unsigned int ro_size;
314 
315 #ifdef CONFIG_MODULES_TREE_LOOKUP
316         struct mod_tree_node mtn;
317 #endif
318 };
319 
320 #ifdef CONFIG_MODULES_TREE_LOOKUP
321 /* Only touch one cacheline for common rbtree-for-core-layout case. */
322 #define __module_layout_align ____cacheline_aligned
323 #else
324 #define __module_layout_align
325 #endif
326 
327 struct mod_kallsyms {
328         Elf_Sym *symtab;
329         unsigned int num_symtab;
330         char *strtab;
331 };
332 
333 struct module {
334         enum module_state state;
335 
336         /* Member of list of modules */
337         struct list_head list;
338 
339         /* Unique handle for this module */
340         char name[MODULE_NAME_LEN];
341 
342         /* Sysfs stuff. */
343         struct module_kobject mkobj;
344         struct module_attribute *modinfo_attrs;
345         const char *version;
346         const char *srcversion;
347         struct kobject *holders_dir;
348 
349         /* Exported symbols */
350         const struct kernel_symbol *syms;
351         const unsigned long *crcs;
352         unsigned int num_syms;
353 
354         /* Kernel parameters. */
355 #ifdef CONFIG_SYSFS
356         struct mutex param_lock;
357 #endif
358         struct kernel_param *kp;
359         unsigned int num_kp;
360 
361         /* GPL-only exported symbols. */
362         unsigned int num_gpl_syms;
363         const struct kernel_symbol *gpl_syms;
364         const unsigned long *gpl_crcs;
365 
366 #ifdef CONFIG_UNUSED_SYMBOLS
367         /* unused exported symbols. */
368         const struct kernel_symbol *unused_syms;
369         const unsigned long *unused_crcs;
370         unsigned int num_unused_syms;
371 
372         /* GPL-only, unused exported symbols. */
373         unsigned int num_unused_gpl_syms;
374         const struct kernel_symbol *unused_gpl_syms;
375         const unsigned long *unused_gpl_crcs;
376 #endif
377 
378 #ifdef CONFIG_MODULE_SIG
379         /* Signature was verified. */
380         bool sig_ok;
381 #endif
382 
383         bool async_probe_requested;
384 
385         /* symbols that will be GPL-only in the near future. */
386         const struct kernel_symbol *gpl_future_syms;
387         const unsigned long *gpl_future_crcs;
388         unsigned int num_gpl_future_syms;
389 
390         /* Exception table */
391         unsigned int num_exentries;
392         struct exception_table_entry *extable;
393 
394         /* Startup function. */
395         int (*init)(void);
396 
397         /* Core layout: rbtree is accessed frequently, so keep together. */
398         struct module_layout core_layout __module_layout_align;
399         struct module_layout init_layout;
400 
401         /* Arch-specific module values */
402         struct mod_arch_specific arch;
403 
404         unsigned int taints;    /* same bits as kernel:tainted */
405 
406 #ifdef CONFIG_GENERIC_BUG
407         /* Support for BUG */
408         unsigned num_bugs;
409         struct list_head bug_list;
410         struct bug_entry *bug_table;
411 #endif
412 
413 #ifdef CONFIG_KALLSYMS
414         /* Protected by RCU and/or module_mutex: use rcu_dereference() */
415         struct mod_kallsyms *kallsyms;
416         struct mod_kallsyms core_kallsyms;
417         
418         /* Section attributes */
419         struct module_sect_attrs *sect_attrs;
420 
421         /* Notes attributes */
422         struct module_notes_attrs *notes_attrs;
423 #endif
424 
425         /* The command line arguments (may be mangled).  People like
426            keeping pointers to this stuff */
427         char *args;
428 
429 #ifdef CONFIG_SMP
430         /* Per-cpu data. */
431         void __percpu *percpu;
432         unsigned int percpu_size;
433 #endif
434 
435 #ifdef CONFIG_TRACEPOINTS
436         unsigned int num_tracepoints;
437         struct tracepoint * const *tracepoints_ptrs;
438 #endif
439 #ifdef HAVE_JUMP_LABEL
440         struct jump_entry *jump_entries;
441         unsigned int num_jump_entries;
442 #endif
443 #ifdef CONFIG_TRACING
444         unsigned int num_trace_bprintk_fmt;
445         const char **trace_bprintk_fmt_start;
446 #endif
447 #ifdef CONFIG_EVENT_TRACING
448         struct trace_event_call **trace_events;
449         unsigned int num_trace_events;
450         struct trace_enum_map **trace_enums;
451         unsigned int num_trace_enums;
452 #endif
453 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
454         unsigned int num_ftrace_callsites;
455         unsigned long *ftrace_callsites;
456 #endif
457 
458 #ifdef CONFIG_LIVEPATCH
459         bool klp_alive;
460 #endif
461 
462 #ifdef CONFIG_MODULE_UNLOAD
463         /* What modules depend on me? */
464         struct list_head source_list;
465         /* What modules do I depend on? */
466         struct list_head target_list;
467 
468         /* Destruction function. */
469         void (*exit)(void);
470 
471         atomic_t refcnt;
472 #endif
473 
474 #ifdef CONFIG_CONSTRUCTORS
475         /* Constructor functions. */
476         ctor_fn_t *ctors;
477         unsigned int num_ctors;
478 #endif
479 } ____cacheline_aligned;
480 #ifndef MODULE_ARCH_INIT
481 #define MODULE_ARCH_INIT {}
482 #endif
483 
484 extern struct mutex module_mutex;
485 
486 /* FIXME: It'd be nice to isolate modules during init, too, so they
487    aren't used before they (may) fail.  But presently too much code
488    (IDE & SCSI) require entry into the module during init.*/
489 static inline int module_is_live(struct module *mod)
490 {
491         return mod->state != MODULE_STATE_GOING;
492 }
493 
494 struct module *__module_text_address(unsigned long addr);
495 struct module *__module_address(unsigned long addr);
496 bool is_module_address(unsigned long addr);
497 bool is_module_percpu_address(unsigned long addr);
498 bool is_module_text_address(unsigned long addr);
499 
500 static inline bool within_module_core(unsigned long addr,
501                                       const struct module *mod)
502 {
503         return (unsigned long)mod->core_layout.base <= addr &&
504                addr < (unsigned long)mod->core_layout.base + mod->core_layout.size;
505 }
506 
507 static inline bool within_module_init(unsigned long addr,
508                                       const struct module *mod)
509 {
510         return (unsigned long)mod->init_layout.base <= addr &&
511                addr < (unsigned long)mod->init_layout.base + mod->init_layout.size;
512 }
513 
514 static inline bool within_module(unsigned long addr, const struct module *mod)
515 {
516         return within_module_init(addr, mod) || within_module_core(addr, mod);
517 }
518 
519 /* Search for module by name: must hold module_mutex. */
520 struct module *find_module(const char *name);
521 
522 struct symsearch {
523         const struct kernel_symbol *start, *stop;
524         const unsigned long *crcs;
525         enum {
526                 NOT_GPL_ONLY,
527                 GPL_ONLY,
528                 WILL_BE_GPL_ONLY,
529         } licence;
530         bool unused;
531 };
532 
533 /*
534  * Search for an exported symbol by name.
535  *
536  * Must be called with module_mutex held or preemption disabled.
537  */
538 const struct kernel_symbol *find_symbol(const char *name,
539                                         struct module **owner,
540                                         const unsigned long **crc,
541                                         bool gplok,
542                                         bool warn);
543 
544 /*
545  * Walk the exported symbol table
546  *
547  * Must be called with module_mutex held or preemption disabled.
548  */
549 bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
550                                     struct module *owner,
551                                     void *data), void *data);
552 
553 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
554    symnum out of range. */
555 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
556                         char *name, char *module_name, int *exported);
557 
558 /* Look for this name: can be of form module:name. */
559 unsigned long module_kallsyms_lookup_name(const char *name);
560 
561 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
562                                              struct module *, unsigned long),
563                                    void *data);
564 
565 extern void __module_put_and_exit(struct module *mod, long code)
566         __attribute__((noreturn));
567 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
568 
569 #ifdef CONFIG_MODULE_UNLOAD
570 int module_refcount(struct module *mod);
571 void __symbol_put(const char *symbol);
572 #define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x))
573 void symbol_put_addr(void *addr);
574 
575 /* Sometimes we know we already have a refcount, and it's easier not
576    to handle the error case (which only happens with rmmod --wait). */
577 extern void __module_get(struct module *module);
578 
579 /* This is the Right Way to get a module: if it fails, it's being removed,
580  * so pretend it's not there. */
581 extern bool try_module_get(struct module *module);
582 
583 extern void module_put(struct module *module);
584 
585 #else /*!CONFIG_MODULE_UNLOAD*/
586 static inline int try_module_get(struct module *module)
587 {
588         return !module || module_is_live(module);
589 }
590 static inline void module_put(struct module *module)
591 {
592 }
593 static inline void __module_get(struct module *module)
594 {
595 }
596 #define symbol_put(x) do { } while (0)
597 #define symbol_put_addr(p) do { } while (0)
598 
599 #endif /* CONFIG_MODULE_UNLOAD */
600 int ref_module(struct module *a, struct module *b);
601 
602 /* This is a #define so the string doesn't get put in every .o file */
603 #define module_name(mod)                        \
604 ({                                              \
605         struct module *__mod = (mod);           \
606         __mod ? __mod->name : "kernel";         \
607 })
608 
609 /* For kallsyms to ask for address resolution.  namebuf should be at
610  * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
611  * found, otherwise NULL. */
612 const char *module_address_lookup(unsigned long addr,
613                             unsigned long *symbolsize,
614                             unsigned long *offset,
615                             char **modname,
616                             char *namebuf);
617 int lookup_module_symbol_name(unsigned long addr, char *symname);
618 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
619 
620 /* For extable.c to search modules' exception tables. */
621 const struct exception_table_entry *search_module_extables(unsigned long addr);
622 
623 int register_module_notifier(struct notifier_block *nb);
624 int unregister_module_notifier(struct notifier_block *nb);
625 
626 extern void print_modules(void);
627 
628 static inline bool module_requested_async_probing(struct module *module)
629 {
630         return module && module->async_probe_requested;
631 }
632 
633 #else /* !CONFIG_MODULES... */
634 
635 /* Given an address, look for it in the exception tables. */
636 static inline const struct exception_table_entry *
637 search_module_extables(unsigned long addr)
638 {
639         return NULL;
640 }
641 
642 static inline struct module *__module_address(unsigned long addr)
643 {
644         return NULL;
645 }
646 
647 static inline struct module *__module_text_address(unsigned long addr)
648 {
649         return NULL;
650 }
651 
652 static inline bool is_module_address(unsigned long addr)
653 {
654         return false;
655 }
656 
657 static inline bool is_module_percpu_address(unsigned long addr)
658 {
659         return false;
660 }
661 
662 static inline bool is_module_text_address(unsigned long addr)
663 {
664         return false;
665 }
666 
667 /* Get/put a kernel symbol (calls should be symmetric) */
668 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
669 #define symbol_put(x) do { } while (0)
670 #define symbol_put_addr(x) do { } while (0)
671 
672 static inline void __module_get(struct module *module)
673 {
674 }
675 
676 static inline int try_module_get(struct module *module)
677 {
678         return 1;
679 }
680 
681 static inline void module_put(struct module *module)
682 {
683 }
684 
685 #define module_name(mod) "kernel"
686 
687 /* For kallsyms to ask for address resolution.  NULL means not found. */
688 static inline const char *module_address_lookup(unsigned long addr,
689                                           unsigned long *symbolsize,
690                                           unsigned long *offset,
691                                           char **modname,
692                                           char *namebuf)
693 {
694         return NULL;
695 }
696 
697 static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
698 {
699         return -ERANGE;
700 }
701 
702 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
703 {
704         return -ERANGE;
705 }
706 
707 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
708                                         char *type, char *name,
709                                         char *module_name, int *exported)
710 {
711         return -ERANGE;
712 }
713 
714 static inline unsigned long module_kallsyms_lookup_name(const char *name)
715 {
716         return 0;
717 }
718 
719 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
720                                                            struct module *,
721                                                            unsigned long),
722                                                  void *data)
723 {
724         return 0;
725 }
726 
727 static inline int register_module_notifier(struct notifier_block *nb)
728 {
729         /* no events will happen anyway, so this can always succeed */
730         return 0;
731 }
732 
733 static inline int unregister_module_notifier(struct notifier_block *nb)
734 {
735         return 0;
736 }
737 
738 #define module_put_and_exit(code) do_exit(code)
739 
740 static inline void print_modules(void)
741 {
742 }
743 
744 static inline bool module_requested_async_probing(struct module *module)
745 {
746         return false;
747 }
748 
749 #endif /* CONFIG_MODULES */
750 
751 #ifdef CONFIG_SYSFS
752 extern struct kset *module_kset;
753 extern struct kobj_type module_ktype;
754 extern int module_sysfs_initialized;
755 #endif /* CONFIG_SYSFS */
756 
757 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
758 
759 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
760 
761 #define __MODULE_STRING(x) __stringify(x)
762 
763 #ifdef CONFIG_DEBUG_SET_MODULE_RONX
764 extern void set_all_modules_text_rw(void);
765 extern void set_all_modules_text_ro(void);
766 extern void module_enable_ro(const struct module *mod);
767 extern void module_disable_ro(const struct module *mod);
768 #else
769 static inline void set_all_modules_text_rw(void) { }
770 static inline void set_all_modules_text_ro(void) { }
771 static inline void module_enable_ro(const struct module *mod) { }
772 static inline void module_disable_ro(const struct module *mod) { }
773 #endif
774 
775 #ifdef CONFIG_GENERIC_BUG
776 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
777                          struct module *);
778 void module_bug_cleanup(struct module *);
779 
780 #else   /* !CONFIG_GENERIC_BUG */
781 
782 static inline void module_bug_finalize(const Elf_Ehdr *hdr,
783                                         const Elf_Shdr *sechdrs,
784                                         struct module *mod)
785 {
786 }
787 static inline void module_bug_cleanup(struct module *mod) {}
788 #endif  /* CONFIG_GENERIC_BUG */
789 
790 #ifdef CONFIG_MODULE_SIG
791 static inline bool module_sig_ok(struct module *module)
792 {
793         return module->sig_ok;
794 }
795 #else   /* !CONFIG_MODULE_SIG */
796 static inline bool module_sig_ok(struct module *module)
797 {
798         return true;
799 }
800 #endif  /* CONFIG_MODULE_SIG */
801 
802 #endif /* _LINUX_MODULE_H */
803 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp