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 #include <linux/error-injection.h>
23 #include <linux/tracepoint-defs.h>
24
25 #include <linux/percpu.h>
26 #include <asm/module.h>
27
28 /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */
29 #define MODULE_SIG_STRING "~Module signature appended~\n"
30
31 /* Not Yet Implemented */
32 #define MODULE_SUPPORTED_DEVICE(name)
33
34 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
35
36 struct modversion_info {
37 unsigned long crc;
38 char name[MODULE_NAME_LEN];
39 };
40
41 struct module;
42 struct exception_table_entry;
43
44 struct module_kobject {
45 struct kobject kobj;
46 struct module *mod;
47 struct kobject *drivers_dir;
48 struct module_param_attrs *mp;
49 struct completion *kobj_completion;
50 } __randomize_layout;
51
52 struct module_attribute {
53 struct attribute attr;
54 ssize_t (*show)(struct module_attribute *, struct module_kobject *,
55 char *);
56 ssize_t (*store)(struct module_attribute *, struct module_kobject *,
57 const char *, size_t count);
58 void (*setup)(struct module *, const char *);
59 int (*test)(struct module *);
60 void (*free)(struct module *);
61 };
62
63 struct module_version_attribute {
64 struct module_attribute mattr;
65 const char *module_name;
66 const char *version;
67 } __attribute__ ((__aligned__(sizeof(void *))));
68
69 extern ssize_t __modver_version_show(struct module_attribute *,
70 struct module_kobject *, char *);
71
72 extern struct module_attribute module_uevent;
73
74 /* These are either module local, or the kernel's dummy ones. */
75 extern int init_module(void);
76 extern void cleanup_module(void);
77
78 #ifndef MODULE
79 /**
80 * module_init() - driver initialization entry point
81 * @x: function to be run at kernel boot time or module insertion
82 *
83 * module_init() will either be called during do_initcalls() (if
84 * builtin) or at module insertion time (if a module). There can only
85 * be one per module.
86 */
87 #define module_init(x) __initcall(x);
88
89 /**
90 * module_exit() - driver exit entry point
91 * @x: function to be run when driver is removed
92 *
93 * module_exit() will wrap the driver clean-up code
94 * with cleanup_module() when used with rmmod when
95 * the driver is a module. If the driver is statically
96 * compiled into the kernel, module_exit() has no effect.
97 * There can only be one per module.
98 */
99 #define module_exit(x) __exitcall(x);
100
101 #else /* MODULE */
102
103 /*
104 * In most cases loadable modules do not need custom
105 * initcall levels. There are still some valid cases where
106 * a driver may be needed early if built in, and does not
107 * matter when built as a loadable module. Like bus
108 * snooping debug drivers.
109 */
110 #define early_initcall(fn) module_init(fn)
111 #define core_initcall(fn) module_init(fn)
112 #define core_initcall_sync(fn) module_init(fn)
113 #define postcore_initcall(fn) module_init(fn)
114 #define postcore_initcall_sync(fn) module_init(fn)
115 #define arch_initcall(fn) module_init(fn)
116 #define subsys_initcall(fn) module_init(fn)
117 #define subsys_initcall_sync(fn) module_init(fn)
118 #define fs_initcall(fn) module_init(fn)
119 #define fs_initcall_sync(fn) module_init(fn)
120 #define rootfs_initcall(fn) module_init(fn)
121 #define device_initcall(fn) module_init(fn)
122 #define device_initcall_sync(fn) module_init(fn)
123 #define late_initcall(fn) module_init(fn)
124 #define late_initcall_sync(fn) module_init(fn)
125
126 #define console_initcall(fn) module_init(fn)
127
128 /* Each module must use one module_init(). */
129 #define module_init(initfn) \
130 static inline initcall_t __maybe_unused __inittest(void) \
131 { return initfn; } \
132 int init_module(void) __copy(initfn) __attribute__((alias(#initfn)));
133
134 /* This is only required if you want to be unloadable. */
135 #define module_exit(exitfn) \
136 static inline exitcall_t __maybe_unused __exittest(void) \
137 { return exitfn; } \
138 void cleanup_module(void) __copy(exitfn) __attribute__((alias(#exitfn)));
139
140 #endif
141
142 /* This means "can be init if no module support, otherwise module load
143 may call it." */
144 #ifdef CONFIG_MODULES
145 #define __init_or_module
146 #define __initdata_or_module
147 #define __initconst_or_module
148 #define __INIT_OR_MODULE .text
149 #define __INITDATA_OR_MODULE .data
150 #define __INITRODATA_OR_MODULE .section ".rodata","a",%progbits
151 #else
152 #define __init_or_module __init
153 #define __initdata_or_module __initdata
154 #define __initconst_or_module __initconst
155 #define __INIT_OR_MODULE __INIT
156 #define __INITDATA_OR_MODULE __INITDATA
157 #define __INITRODATA_OR_MODULE __INITRODATA
158 #endif /*CONFIG_MODULES*/
159
160 /* Generic info of form tag = "info" */
161 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
162
163 /* For userspace: you can also call me... */
164 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
165
166 /* Soft module dependencies. See man modprobe.d for details.
167 * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz")
168 */
169 #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep)
170
171 /*
172 * The following license idents are currently accepted as indicating free
173 * software modules
174 *
175 * "GPL" [GNU Public License v2 or later]
176 * "GPL v2" [GNU Public License v2]
177 * "GPL and additional rights" [GNU Public License v2 rights and more]
178 * "Dual BSD/GPL" [GNU Public License v2
179 * or BSD license choice]
180 * "Dual MIT/GPL" [GNU Public License v2
181 * or MIT license choice]
182 * "Dual MPL/GPL" [GNU Public License v2
183 * or Mozilla license choice]
184 *
185 * The following other idents are available
186 *
187 * "Proprietary" [Non free products]
188 *
189 * There are dual licensed components, but when running with Linux it is the
190 * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
191 * is a GPL combined work.
192 *
193 * This exists for several reasons
194 * 1. So modinfo can show license info for users wanting to vet their setup
195 * is free
196 * 2. So the community can ignore bug reports including proprietary modules
197 * 3. So vendors can do likewise based on their own policies
198 */
199 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
200
201 /*
202 * Author(s), use "Name <email>" or just "Name", for multiple
203 * authors use multiple MODULE_AUTHOR() statements/lines.
204 */
205 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
206
207 /* What your module does. */
208 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
209
210 #ifdef MODULE
211 /* Creates an alias so file2alias.c can find device table. */
212 #define MODULE_DEVICE_TABLE(type, name) \
213 extern typeof(name) __mod_##type##__##name##_device_table \
214 __attribute__ ((unused, alias(__stringify(name))))
215 #else /* !MODULE */
216 #define MODULE_DEVICE_TABLE(type, name)
217 #endif
218
219 /* Version of form [<epoch>:]<version>[-<extra-version>].
220 * Or for CVS/RCS ID version, everything but the number is stripped.
221 * <epoch>: A (small) unsigned integer which allows you to start versions
222 * anew. If not mentioned, it's zero. eg. "2:1.0" is after
223 * "1:2.0".
224
225 * <version>: The <version> may contain only alphanumerics and the
226 * character `.'. Ordered by numeric sort for numeric parts,
227 * ascii sort for ascii parts (as per RPM or DEB algorithm).
228
229 * <extraversion>: Like <version>, but inserted for local
230 * customizations, eg "rh3" or "rusty1".
231
232 * Using this automatically adds a checksum of the .c files and the
233 * local headers in "srcversion".
234 */
235
236 #if defined(MODULE) || !defined(CONFIG_SYSFS)
237 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
238 #else
239 #define MODULE_VERSION(_version) \
240 static struct module_version_attribute ___modver_attr = { \
241 .mattr = { \
242 .attr = { \
243 .name = "version", \
244 .mode = S_IRUGO, \
245 }, \
246 .show = __modver_version_show, \
247 }, \
248 .module_name = KBUILD_MODNAME, \
249 .version = _version, \
250 }; \
251 static const struct module_version_attribute \
252 __used __attribute__ ((__section__ ("__modver"))) \
253 * __moduleparam_const __modver_attr = &___modver_attr
254 #endif
255
256 /* Optional firmware file (or files) needed by the module
257 * format is simply firmware file name. Multiple firmware
258 * files require multiple MODULE_FIRMWARE() specifiers */
259 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
260
261 struct notifier_block;
262
263 #ifdef CONFIG_MODULES
264
265 extern int modules_disabled; /* for sysctl */
266 /* Get/put a kernel symbol (calls must be symmetric) */
267 void *__symbol_get(const char *symbol);
268 void *__symbol_get_gpl(const char *symbol);
269 #define symbol_get(x) ((typeof(&x))(__symbol_get(__stringify(x))))
270
271 /* modules using other modules: kdb wants to see this. */
272 struct module_use {
273 struct list_head source_list;
274 struct list_head target_list;
275 struct module *source, *target;
276 };
277
278 enum module_state {
279 MODULE_STATE_LIVE, /* Normal state. */
280 MODULE_STATE_COMING, /* Full formed, running module_init. */
281 MODULE_STATE_GOING, /* Going away. */
282 MODULE_STATE_UNFORMED, /* Still setting it up. */
283 };
284
285 struct mod_tree_node {
286 struct module *mod;
287 struct latch_tree_node node;
288 };
289
290 struct module_layout {
291 /* The actual code + data. */
292 void *base;
293 /* Total size. */
294 unsigned int size;
295 /* The size of the executable code. */
296 unsigned int text_size;
297 /* Size of RO section of the module (text+rodata) */
298 unsigned int ro_size;
299 /* Size of RO after init section */
300 unsigned int ro_after_init_size;
301
302 #ifdef CONFIG_MODULES_TREE_LOOKUP
303 struct mod_tree_node mtn;
304 #endif
305 };
306
307 #ifdef CONFIG_MODULES_TREE_LOOKUP
308 /* Only touch one cacheline for common rbtree-for-core-layout case. */
309 #define __module_layout_align ____cacheline_aligned
310 #else
311 #define __module_layout_align
312 #endif
313
314 struct mod_kallsyms {
315 Elf_Sym *symtab;
316 unsigned int num_symtab;
317 char *strtab;
318 };
319
320 #ifdef CONFIG_LIVEPATCH
321 struct klp_modinfo {
322 Elf_Ehdr hdr;
323 Elf_Shdr *sechdrs;
324 char *secstrings;
325 unsigned int symndx;
326 };
327 #endif
328
329 struct module {
330 enum module_state state;
331
332 /* Member of list of modules */
333 struct list_head list;
334
335 /* Unique handle for this module */
336 char name[MODULE_NAME_LEN];
337
338 /* Sysfs stuff. */
339 struct module_kobject mkobj;
340 struct module_attribute *modinfo_attrs;
341 const char *version;
342 const char *srcversion;
343 struct kobject *holders_dir;
344
345 /* Exported symbols */
346 const struct kernel_symbol *syms;
347 const s32 *crcs;
348 unsigned int num_syms;
349
350 /* Kernel parameters. */
351 #ifdef CONFIG_SYSFS
352 struct mutex param_lock;
353 #endif
354 struct kernel_param *kp;
355 unsigned int num_kp;
356
357 /* GPL-only exported symbols. */
358 unsigned int num_gpl_syms;
359 const struct kernel_symbol *gpl_syms;
360 const s32 *gpl_crcs;
361
362 #ifdef CONFIG_UNUSED_SYMBOLS
363 /* unused exported symbols. */
364 const struct kernel_symbol *unused_syms;
365 const s32 *unused_crcs;
366 unsigned int num_unused_syms;
367
368 /* GPL-only, unused exported symbols. */
369 unsigned int num_unused_gpl_syms;
370 const struct kernel_symbol *unused_gpl_syms;
371 const s32 *unused_gpl_crcs;
372 #endif
373
374 #ifdef CONFIG_MODULE_SIG
375 /* Signature was verified. */
376 bool sig_ok;
377 #endif
378
379 bool async_probe_requested;
380
381 /* symbols that will be GPL-only in the near future. */
382 const struct kernel_symbol *gpl_future_syms;
383 const s32 *gpl_future_crcs;
384 unsigned int num_gpl_future_syms;
385
386 /* Exception table */
387 unsigned int num_exentries;
388 struct exception_table_entry *extable;
389
390 /* Startup function. */
391 int (*init)(void);
392
393 /* Core layout: rbtree is accessed frequently, so keep together. */
394 struct module_layout core_layout __module_layout_align;
395 struct module_layout init_layout;
396
397 /* Arch-specific module values */
398 struct mod_arch_specific arch;
399
400 unsigned long taints; /* same bits as kernel:taint_flags */
401
402 #ifdef CONFIG_GENERIC_BUG
403 /* Support for BUG */
404 unsigned num_bugs;
405 struct list_head bug_list;
406 struct bug_entry *bug_table;
407 #endif
408
409 #ifdef CONFIG_KALLSYMS
410 /* Protected by RCU and/or module_mutex: use rcu_dereference() */
411 struct mod_kallsyms *kallsyms;
412 struct mod_kallsyms core_kallsyms;
413
414 /* Section attributes */
415 struct module_sect_attrs *sect_attrs;
416
417 /* Notes attributes */
418 struct module_notes_attrs *notes_attrs;
419 #endif
420
421 /* The command line arguments (may be mangled). People like
422 keeping pointers to this stuff */
423 char *args;
424
425 #ifdef CONFIG_SMP
426 /* Per-cpu data. */
427 void __percpu *percpu;
428 unsigned int percpu_size;
429 #endif
430
431 #ifdef CONFIG_TRACEPOINTS
432 unsigned int num_tracepoints;
433 tracepoint_ptr_t *tracepoints_ptrs;
434 #endif
435 #ifdef CONFIG_BPF_EVENTS
436 unsigned int num_bpf_raw_events;
437 struct bpf_raw_event_map *bpf_raw_events;
438 #endif
439 #ifdef CONFIG_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_eval_map **trace_evals;
451 unsigned int num_trace_evals;
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; /* Is this a livepatch module? */
460 bool klp_alive;
461
462 /* Elf information */
463 struct klp_modinfo *klp_info;
464 #endif
465
466 #ifdef CONFIG_MODULE_UNLOAD
467 /* What modules depend on me? */
468 struct list_head source_list;
469 /* What modules do I depend on? */
470 struct list_head target_list;
471
472 /* Destruction function. */
473 void (*exit)(void);
474
475 atomic_t refcnt;
476 #endif
477
478 #ifdef CONFIG_CONSTRUCTORS
479 /* Constructor functions. */
480 ctor_fn_t *ctors;
481 unsigned int num_ctors;
482 #endif
483
484 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
485 struct error_injection_entry *ei_funcs;
486 unsigned int num_ei_funcs;
487 #endif
488 } ____cacheline_aligned __randomize_layout;
489 #ifndef MODULE_ARCH_INIT
490 #define MODULE_ARCH_INIT {}
491 #endif
492
493 #ifndef HAVE_ARCH_KALLSYMS_SYMBOL_VALUE
494 static inline unsigned long kallsyms_symbol_value(const Elf_Sym *sym)
495 {
496 return sym->st_value;
497 }
498 #endif
499
500 extern struct mutex module_mutex;
501
502 /* FIXME: It'd be nice to isolate modules during init, too, so they
503 aren't used before they (may) fail. But presently too much code
504 (IDE & SCSI) require entry into the module during init.*/
505 static inline bool module_is_live(struct module *mod)
506 {
507 return mod->state != MODULE_STATE_GOING;
508 }
509
510 struct module *__module_text_address(unsigned long addr);
511 struct module *__module_address(unsigned long addr);
512 bool is_module_address(unsigned long addr);
513 bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr);
514 bool is_module_percpu_address(unsigned long addr);
515 bool is_module_text_address(unsigned long addr);
516
517 static inline bool within_module_core(unsigned long addr,
518 const struct module *mod)
519 {
520 return (unsigned long)mod->core_layout.base <= addr &&
521 addr < (unsigned long)mod->core_layout.base + mod->core_layout.size;
522 }
523
524 static inline bool within_module_init(unsigned long addr,
525 const struct module *mod)
526 {
527 return (unsigned long)mod->init_layout.base <= addr &&
528 addr < (unsigned long)mod->init_layout.base + mod->init_layout.size;
529 }
530
531 static inline bool within_module(unsigned long addr, const struct module *mod)
532 {
533 return within_module_init(addr, mod) || within_module_core(addr, mod);
534 }
535
536 /* Search for module by name: must hold module_mutex. */
537 struct module *find_module(const char *name);
538
539 struct symsearch {
540 const struct kernel_symbol *start, *stop;
541 const s32 *crcs;
542 enum {
543 NOT_GPL_ONLY,
544 GPL_ONLY,
545 WILL_BE_GPL_ONLY,
546 } licence;
547 bool unused;
548 };
549
550 /*
551 * Search for an exported symbol by name.
552 *
553 * Must be called with module_mutex held or preemption disabled.
554 */
555 const struct kernel_symbol *find_symbol(const char *name,
556 struct module **owner,
557 const s32 **crc,
558 bool gplok,
559 bool warn);
560
561 /*
562 * Walk the exported symbol table
563 *
564 * Must be called with module_mutex held or preemption disabled.
565 */
566 bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
567 struct module *owner,
568 void *data), void *data);
569
570 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
571 symnum out of range. */
572 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
573 char *name, char *module_name, int *exported);
574
575 /* Look for this name: can be of form module:name. */
576 unsigned long module_kallsyms_lookup_name(const char *name);
577
578 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
579 struct module *, unsigned long),
580 void *data);
581
582 extern void __noreturn __module_put_and_exit(struct module *mod,
583 long code);
584 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
585
586 #ifdef CONFIG_MODULE_UNLOAD
587 int module_refcount(struct module *mod);
588 void __symbol_put(const char *symbol);
589 #define symbol_put(x) __symbol_put(__stringify(x))
590 void symbol_put_addr(void *addr);
591
592 /* Sometimes we know we already have a refcount, and it's easier not
593 to handle the error case (which only happens with rmmod --wait). */
594 extern void __module_get(struct module *module);
595
596 /* This is the Right Way to get a module: if it fails, it's being removed,
597 * so pretend it's not there. */
598 extern bool try_module_get(struct module *module);
599
600 extern void module_put(struct module *module);
601
602 #else /*!CONFIG_MODULE_UNLOAD*/
603 static inline bool try_module_get(struct module *module)
604 {
605 return !module || module_is_live(module);
606 }
607 static inline void module_put(struct module *module)
608 {
609 }
610 static inline void __module_get(struct module *module)
611 {
612 }
613 #define symbol_put(x) do { } while (0)
614 #define symbol_put_addr(p) do { } while (0)
615
616 #endif /* CONFIG_MODULE_UNLOAD */
617 int ref_module(struct module *a, struct module *b);
618
619 /* This is a #define so the string doesn't get put in every .o file */
620 #define module_name(mod) \
621 ({ \
622 struct module *__mod = (mod); \
623 __mod ? __mod->name : "kernel"; \
624 })
625
626 /* Dereference module function descriptor */
627 void *dereference_module_function_descriptor(struct module *mod, void *ptr);
628
629 /* For kallsyms to ask for address resolution. namebuf should be at
630 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
631 * found, otherwise NULL. */
632 const char *module_address_lookup(unsigned long addr,
633 unsigned long *symbolsize,
634 unsigned long *offset,
635 char **modname,
636 char *namebuf);
637 int lookup_module_symbol_name(unsigned long addr, char *symname);
638 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
639
640 int register_module_notifier(struct notifier_block *nb);
641 int unregister_module_notifier(struct notifier_block *nb);
642
643 extern void print_modules(void);
644
645 static inline bool module_requested_async_probing(struct module *module)
646 {
647 return module && module->async_probe_requested;
648 }
649
650 #ifdef CONFIG_LIVEPATCH
651 static inline bool is_livepatch_module(struct module *mod)
652 {
653 return mod->klp;
654 }
655 #else /* !CONFIG_LIVEPATCH */
656 static inline bool is_livepatch_module(struct module *mod)
657 {
658 return false;
659 }
660 #endif /* CONFIG_LIVEPATCH */
661
662 bool is_module_sig_enforced(void);
663
664 #else /* !CONFIG_MODULES... */
665
666 static inline struct module *__module_address(unsigned long addr)
667 {
668 return NULL;
669 }
670
671 static inline struct module *__module_text_address(unsigned long addr)
672 {
673 return NULL;
674 }
675
676 static inline bool is_module_address(unsigned long addr)
677 {
678 return false;
679 }
680
681 static inline bool is_module_percpu_address(unsigned long addr)
682 {
683 return false;
684 }
685
686 static inline bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr)
687 {
688 return false;
689 }
690
691 static inline bool is_module_text_address(unsigned long addr)
692 {
693 return false;
694 }
695
696 /* Get/put a kernel symbol (calls should be symmetric) */
697 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
698 #define symbol_put(x) do { } while (0)
699 #define symbol_put_addr(x) do { } while (0)
700
701 static inline void __module_get(struct module *module)
702 {
703 }
704
705 static inline bool try_module_get(struct module *module)
706 {
707 return true;
708 }
709
710 static inline void module_put(struct module *module)
711 {
712 }
713
714 #define module_name(mod) "kernel"
715
716 /* For kallsyms to ask for address resolution. NULL means not found. */
717 static inline const char *module_address_lookup(unsigned long addr,
718 unsigned long *symbolsize,
719 unsigned long *offset,
720 char **modname,
721 char *namebuf)
722 {
723 return NULL;
724 }
725
726 static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
727 {
728 return -ERANGE;
729 }
730
731 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
732 {
733 return -ERANGE;
734 }
735
736 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
737 char *type, char *name,
738 char *module_name, int *exported)
739 {
740 return -ERANGE;
741 }
742
743 static inline unsigned long module_kallsyms_lookup_name(const char *name)
744 {
745 return 0;
746 }
747
748 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
749 struct module *,
750 unsigned long),
751 void *data)
752 {
753 return 0;
754 }
755
756 static inline int register_module_notifier(struct notifier_block *nb)
757 {
758 /* no events will happen anyway, so this can always succeed */
759 return 0;
760 }
761
762 static inline int unregister_module_notifier(struct notifier_block *nb)
763 {
764 return 0;
765 }
766
767 #define module_put_and_exit(code) do_exit(code)
768
769 static inline void print_modules(void)
770 {
771 }
772
773 static inline bool module_requested_async_probing(struct module *module)
774 {
775 return false;
776 }
777
778 static inline bool is_module_sig_enforced(void)
779 {
780 return false;
781 }
782
783 /* Dereference module function descriptor */
784 static inline
785 void *dereference_module_function_descriptor(struct module *mod, void *ptr)
786 {
787 return ptr;
788 }
789
790 #endif /* CONFIG_MODULES */
791
792 #ifdef CONFIG_SYSFS
793 extern struct kset *module_kset;
794 extern struct kobj_type module_ktype;
795 extern int module_sysfs_initialized;
796 #endif /* CONFIG_SYSFS */
797
798 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
799
800 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
801
802 #define __MODULE_STRING(x) __stringify(x)
803
804 #ifdef CONFIG_STRICT_MODULE_RWX
805 extern void set_all_modules_text_rw(void);
806 extern void set_all_modules_text_ro(void);
807 extern void module_enable_ro(const struct module *mod, bool after_init);
808 extern void module_disable_ro(const struct module *mod);
809 #else
810 static inline void set_all_modules_text_rw(void) { }
811 static inline void set_all_modules_text_ro(void) { }
812 static inline void module_enable_ro(const struct module *mod, bool after_init) { }
813 static inline void module_disable_ro(const struct module *mod) { }
814 #endif
815
816 #ifdef CONFIG_GENERIC_BUG
817 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
818 struct module *);
819 void module_bug_cleanup(struct module *);
820
821 #else /* !CONFIG_GENERIC_BUG */
822
823 static inline void module_bug_finalize(const Elf_Ehdr *hdr,
824 const Elf_Shdr *sechdrs,
825 struct module *mod)
826 {
827 }
828 static inline void module_bug_cleanup(struct module *mod) {}
829 #endif /* CONFIG_GENERIC_BUG */
830
831 #ifdef CONFIG_RETPOLINE
832 extern bool retpoline_module_ok(bool has_retpoline);
833 #else
834 static inline bool retpoline_module_ok(bool has_retpoline)
835 {
836 return true;
837 }
838 #endif
839
840 #ifdef CONFIG_MODULE_SIG
841 static inline bool module_sig_ok(struct module *module)
842 {
843 return module->sig_ok;
844 }
845 #else /* !CONFIG_MODULE_SIG */
846 static inline bool module_sig_ok(struct module *module)
847 {
848 return true;
849 }
850 #endif /* CONFIG_MODULE_SIG */
851
852 #endif /* _LINUX_MODULE_H */
853
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