1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Dynamic loading of modules into the kernel.
4 *
5 * Rewritten by Richard Henderson <rth@tamu.edu> Dec 1996
6 * Rewritten again by Rusty Russell, 2002
7 */
8
9 #ifndef _LINUX_MODULE_H
10 #define _LINUX_MODULE_H
11
12 #include <linux/list.h>
13 #include <linux/stat.h>
14 #include <linux/compiler.h>
15 #include <linux/cache.h>
16 #include <linux/kmod.h>
17 #include <linux/init.h>
18 #include <linux/elf.h>
19 #include <linux/stringify.h>
20 #include <linux/kobject.h>
21 #include <linux/moduleparam.h>
22 #include <linux/jump_label.h>
23 #include <linux/export.h>
24 #include <linux/rbtree_latch.h>
25 #include <linux/error-injection.h>
26 #include <linux/tracepoint-defs.h>
27 #include <linux/srcu.h>
28
29 #include <linux/percpu.h>
30 #include <asm/module.h>
31
32 /* Not Yet Implemented */
33 #define MODULE_SUPPORTED_DEVICE(name)
34
35 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
36
37 struct modversion_info {
38 unsigned long crc;
39 char name[MODULE_NAME_LEN];
40 };
41
42 struct module;
43 struct exception_table_entry;
44
45 struct module_kobject {
46 struct kobject kobj;
47 struct module *mod;
48 struct kobject *drivers_dir;
49 struct module_param_attrs *mp;
50 struct completion *kobj_completion;
51 } __randomize_layout;
52
53 struct module_attribute {
54 struct attribute attr;
55 ssize_t (*show)(struct module_attribute *, struct module_kobject *,
56 char *);
57 ssize_t (*store)(struct module_attribute *, struct module_kobject *,
58 const char *, size_t count);
59 void (*setup)(struct module *, const char *);
60 int (*test)(struct module *);
61 void (*free)(struct module *);
62 };
63
64 struct module_version_attribute {
65 struct module_attribute mattr;
66 const char *module_name;
67 const char *version;
68 } __attribute__ ((__aligned__(sizeof(void *))));
69
70 extern ssize_t __modver_version_show(struct module_attribute *,
71 struct module_kobject *, char *);
72
73 extern struct module_attribute module_uevent;
74
75 /* These are either module local, or the kernel's dummy ones. */
76 extern int init_module(void);
77 extern void cleanup_module(void);
78
79 #ifndef MODULE
80 /**
81 * module_init() - driver initialization entry point
82 * @x: function to be run at kernel boot time or module insertion
83 *
84 * module_init() will either be called during do_initcalls() (if
85 * builtin) or at module insertion time (if a module). There can only
86 * be one per module.
87 */
88 #define module_init(x) __initcall(x);
89
90 /**
91 * module_exit() - driver exit entry point
92 * @x: function to be run when driver is removed
93 *
94 * module_exit() will wrap the driver clean-up code
95 * with cleanup_module() when used with rmmod when
96 * the driver is a module. If the driver is statically
97 * compiled into the kernel, module_exit() has no effect.
98 * There can only be one per module.
99 */
100 #define module_exit(x) __exitcall(x);
101
102 #else /* MODULE */
103
104 /*
105 * In most cases loadable modules do not need custom
106 * initcall levels. There are still some valid cases where
107 * a driver may be needed early if built in, and does not
108 * matter when built as a loadable module. Like bus
109 * snooping debug drivers.
110 */
111 #define early_initcall(fn) module_init(fn)
112 #define core_initcall(fn) module_init(fn)
113 #define core_initcall_sync(fn) module_init(fn)
114 #define postcore_initcall(fn) module_init(fn)
115 #define postcore_initcall_sync(fn) module_init(fn)
116 #define arch_initcall(fn) module_init(fn)
117 #define subsys_initcall(fn) module_init(fn)
118 #define subsys_initcall_sync(fn) module_init(fn)
119 #define fs_initcall(fn) module_init(fn)
120 #define fs_initcall_sync(fn) module_init(fn)
121 #define rootfs_initcall(fn) module_init(fn)
122 #define device_initcall(fn) module_init(fn)
123 #define device_initcall_sync(fn) module_init(fn)
124 #define late_initcall(fn) module_init(fn)
125 #define late_initcall_sync(fn) module_init(fn)
126
127 #define console_initcall(fn) module_init(fn)
128
129 /* Each module must use one module_init(). */
130 #define module_init(initfn) \
131 static inline initcall_t __maybe_unused __inittest(void) \
132 { return initfn; } \
133 int init_module(void) __copy(initfn) __attribute__((alias(#initfn)));
134
135 /* This is only required if you want to be unloadable. */
136 #define module_exit(exitfn) \
137 static inline exitcall_t __maybe_unused __exittest(void) \
138 { return exitfn; } \
139 void cleanup_module(void) __copy(exitfn) __attribute__((alias(#exitfn)));
140
141 #endif
142
143 /* This means "can be init if no module support, otherwise module load
144 may call it." */
145 #ifdef CONFIG_MODULES
146 #define __init_or_module
147 #define __initdata_or_module
148 #define __initconst_or_module
149 #define __INIT_OR_MODULE .text
150 #define __INITDATA_OR_MODULE .data
151 #define __INITRODATA_OR_MODULE .section ".rodata","a",%progbits
152 #else
153 #define __init_or_module __init
154 #define __initdata_or_module __initdata
155 #define __initconst_or_module __initconst
156 #define __INIT_OR_MODULE __INIT
157 #define __INITDATA_OR_MODULE __INITDATA
158 #define __INITRODATA_OR_MODULE __INITRODATA
159 #endif /*CONFIG_MODULES*/
160
161 /* Generic info of form tag = "info" */
162 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
163
164 /* For userspace: you can also call me... */
165 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
166
167 /* Soft module dependencies. See man modprobe.d for details.
168 * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz")
169 */
170 #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep)
171
172 /*
173 * MODULE_FILE is used for generating modules.builtin
174 * So, make it no-op when this is being built as a module
175 */
176 #ifdef MODULE
177 #define MODULE_FILE
178 #else
179 #define MODULE_FILE MODULE_INFO(file, KBUILD_MODFILE);
180 #endif
181
182 /*
183 * The following license idents are currently accepted as indicating free
184 * software modules
185 *
186 * "GPL" [GNU Public License v2]
187 * "GPL v2" [GNU Public License v2]
188 * "GPL and additional rights" [GNU Public License v2 rights and more]
189 * "Dual BSD/GPL" [GNU Public License v2
190 * or BSD license choice]
191 * "Dual MIT/GPL" [GNU Public License v2
192 * or MIT license choice]
193 * "Dual MPL/GPL" [GNU Public License v2
194 * or Mozilla license choice]
195 *
196 * The following other idents are available
197 *
198 * "Proprietary" [Non free products]
199 *
200 * Both "GPL v2" and "GPL" (the latter also in dual licensed strings) are
201 * merely stating that the module is licensed under the GPL v2, but are not
202 * telling whether "GPL v2 only" or "GPL v2 or later". The reason why there
203 * are two variants is a historic and failed attempt to convey more
204 * information in the MODULE_LICENSE string. For module loading the
205 * "only/or later" distinction is completely irrelevant and does neither
206 * replace the proper license identifiers in the corresponding source file
207 * nor amends them in any way. The sole purpose is to make the
208 * 'Proprietary' flagging work and to refuse to bind symbols which are
209 * exported with EXPORT_SYMBOL_GPL when a non free module is loaded.
210 *
211 * In the same way "BSD" is not a clear license information. It merely
212 * states, that the module is licensed under one of the compatible BSD
213 * license variants. The detailed and correct license information is again
214 * to be found in the corresponding source files.
215 *
216 * There are dual licensed components, but when running with Linux it is the
217 * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
218 * is a GPL combined work.
219 *
220 * This exists for several reasons
221 * 1. So modinfo can show license info for users wanting to vet their setup
222 * is free
223 * 2. So the community can ignore bug reports including proprietary modules
224 * 3. So vendors can do likewise based on their own policies
225 */
226 #define MODULE_LICENSE(_license) MODULE_FILE MODULE_INFO(license, _license)
227
228 /*
229 * Author(s), use "Name <email>" or just "Name", for multiple
230 * authors use multiple MODULE_AUTHOR() statements/lines.
231 */
232 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
233
234 /* What your module does. */
235 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
236
237 #ifdef MODULE
238 /* Creates an alias so file2alias.c can find device table. */
239 #define MODULE_DEVICE_TABLE(type, name) \
240 extern typeof(name) __mod_##type##__##name##_device_table \
241 __attribute__ ((unused, alias(__stringify(name))))
242 #else /* !MODULE */
243 #define MODULE_DEVICE_TABLE(type, name)
244 #endif
245
246 /* Version of form [<epoch>:]<version>[-<extra-version>].
247 * Or for CVS/RCS ID version, everything but the number is stripped.
248 * <epoch>: A (small) unsigned integer which allows you to start versions
249 * anew. If not mentioned, it's zero. eg. "2:1.0" is after
250 * "1:2.0".
251
252 * <version>: The <version> may contain only alphanumerics and the
253 * character `.'. Ordered by numeric sort for numeric parts,
254 * ascii sort for ascii parts (as per RPM or DEB algorithm).
255
256 * <extraversion>: Like <version>, but inserted for local
257 * customizations, eg "rh3" or "rusty1".
258
259 * Using this automatically adds a checksum of the .c files and the
260 * local headers in "srcversion".
261 */
262
263 #if defined(MODULE) || !defined(CONFIG_SYSFS)
264 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
265 #else
266 #define MODULE_VERSION(_version) \
267 MODULE_INFO(version, _version); \
268 static struct module_version_attribute ___modver_attr = { \
269 .mattr = { \
270 .attr = { \
271 .name = "version", \
272 .mode = S_IRUGO, \
273 }, \
274 .show = __modver_version_show, \
275 }, \
276 .module_name = KBUILD_MODNAME, \
277 .version = _version, \
278 }; \
279 static const struct module_version_attribute \
280 __used __attribute__ ((__section__ ("__modver"))) \
281 * __moduleparam_const __modver_attr = &___modver_attr
282 #endif
283
284 /* Optional firmware file (or files) needed by the module
285 * format is simply firmware file name. Multiple firmware
286 * files require multiple MODULE_FIRMWARE() specifiers */
287 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
288
289 #define MODULE_IMPORT_NS(ns) MODULE_INFO(import_ns, #ns)
290
291 struct notifier_block;
292
293 #ifdef CONFIG_MODULES
294
295 extern int modules_disabled; /* for sysctl */
296 /* Get/put a kernel symbol (calls must be symmetric) */
297 void *__symbol_get(const char *symbol);
298 void *__symbol_get_gpl(const char *symbol);
299 #define symbol_get(x) ((typeof(&x))(__symbol_get(__stringify(x))))
300
301 /* modules using other modules: kdb wants to see this. */
302 struct module_use {
303 struct list_head source_list;
304 struct list_head target_list;
305 struct module *source, *target;
306 };
307
308 enum module_state {
309 MODULE_STATE_LIVE, /* Normal state. */
310 MODULE_STATE_COMING, /* Full formed, running module_init. */
311 MODULE_STATE_GOING, /* Going away. */
312 MODULE_STATE_UNFORMED, /* Still setting it up. */
313 };
314
315 struct mod_tree_node {
316 struct module *mod;
317 struct latch_tree_node node;
318 };
319
320 struct module_layout {
321 /* The actual code + data. */
322 void *base;
323 /* Total size. */
324 unsigned int size;
325 /* The size of the executable code. */
326 unsigned int text_size;
327 /* Size of RO section of the module (text+rodata) */
328 unsigned int ro_size;
329 /* Size of RO after init section */
330 unsigned int ro_after_init_size;
331
332 #ifdef CONFIG_MODULES_TREE_LOOKUP
333 struct mod_tree_node mtn;
334 #endif
335 };
336
337 #ifdef CONFIG_MODULES_TREE_LOOKUP
338 /* Only touch one cacheline for common rbtree-for-core-layout case. */
339 #define __module_layout_align ____cacheline_aligned
340 #else
341 #define __module_layout_align
342 #endif
343
344 struct mod_kallsyms {
345 Elf_Sym *symtab;
346 unsigned int num_symtab;
347 char *strtab;
348 char *typetab;
349 };
350
351 #ifdef CONFIG_LIVEPATCH
352 struct klp_modinfo {
353 Elf_Ehdr hdr;
354 Elf_Shdr *sechdrs;
355 char *secstrings;
356 unsigned int symndx;
357 };
358 #endif
359
360 struct module {
361 enum module_state state;
362
363 /* Member of list of modules */
364 struct list_head list;
365
366 /* Unique handle for this module */
367 char name[MODULE_NAME_LEN];
368
369 /* Sysfs stuff. */
370 struct module_kobject mkobj;
371 struct module_attribute *modinfo_attrs;
372 const char *version;
373 const char *srcversion;
374 struct kobject *holders_dir;
375
376 /* Exported symbols */
377 const struct kernel_symbol *syms;
378 const s32 *crcs;
379 unsigned int num_syms;
380
381 /* Kernel parameters. */
382 #ifdef CONFIG_SYSFS
383 struct mutex param_lock;
384 #endif
385 struct kernel_param *kp;
386 unsigned int num_kp;
387
388 /* GPL-only exported symbols. */
389 unsigned int num_gpl_syms;
390 const struct kernel_symbol *gpl_syms;
391 const s32 *gpl_crcs;
392
393 #ifdef CONFIG_UNUSED_SYMBOLS
394 /* unused exported symbols. */
395 const struct kernel_symbol *unused_syms;
396 const s32 *unused_crcs;
397 unsigned int num_unused_syms;
398
399 /* GPL-only, unused exported symbols. */
400 unsigned int num_unused_gpl_syms;
401 const struct kernel_symbol *unused_gpl_syms;
402 const s32 *unused_gpl_crcs;
403 #endif
404
405 #ifdef CONFIG_MODULE_SIG
406 /* Signature was verified. */
407 bool sig_ok;
408 #endif
409
410 bool async_probe_requested;
411
412 /* symbols that will be GPL-only in the near future. */
413 const struct kernel_symbol *gpl_future_syms;
414 const s32 *gpl_future_crcs;
415 unsigned int num_gpl_future_syms;
416
417 /* Exception table */
418 unsigned int num_exentries;
419 struct exception_table_entry *extable;
420
421 /* Startup function. */
422 int (*init)(void);
423
424 /* Core layout: rbtree is accessed frequently, so keep together. */
425 struct module_layout core_layout __module_layout_align;
426 struct module_layout init_layout;
427
428 /* Arch-specific module values */
429 struct mod_arch_specific arch;
430
431 unsigned long taints; /* same bits as kernel:taint_flags */
432
433 #ifdef CONFIG_GENERIC_BUG
434 /* Support for BUG */
435 unsigned num_bugs;
436 struct list_head bug_list;
437 struct bug_entry *bug_table;
438 #endif
439
440 #ifdef CONFIG_KALLSYMS
441 /* Protected by RCU and/or module_mutex: use rcu_dereference() */
442 struct mod_kallsyms __rcu *kallsyms;
443 struct mod_kallsyms core_kallsyms;
444
445 /* Section attributes */
446 struct module_sect_attrs *sect_attrs;
447
448 /* Notes attributes */
449 struct module_notes_attrs *notes_attrs;
450 #endif
451
452 /* The command line arguments (may be mangled). People like
453 keeping pointers to this stuff */
454 char *args;
455
456 #ifdef CONFIG_SMP
457 /* Per-cpu data. */
458 void __percpu *percpu;
459 unsigned int percpu_size;
460 #endif
461
462 #ifdef CONFIG_TRACEPOINTS
463 unsigned int num_tracepoints;
464 tracepoint_ptr_t *tracepoints_ptrs;
465 #endif
466 #ifdef CONFIG_TREE_SRCU
467 unsigned int num_srcu_structs;
468 struct srcu_struct **srcu_struct_ptrs;
469 #endif
470 #ifdef CONFIG_BPF_EVENTS
471 unsigned int num_bpf_raw_events;
472 struct bpf_raw_event_map *bpf_raw_events;
473 #endif
474 #ifdef CONFIG_JUMP_LABEL
475 struct jump_entry *jump_entries;
476 unsigned int num_jump_entries;
477 #endif
478 #ifdef CONFIG_TRACING
479 unsigned int num_trace_bprintk_fmt;
480 const char **trace_bprintk_fmt_start;
481 #endif
482 #ifdef CONFIG_EVENT_TRACING
483 struct trace_event_call **trace_events;
484 unsigned int num_trace_events;
485 struct trace_eval_map **trace_evals;
486 unsigned int num_trace_evals;
487 #endif
488 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
489 unsigned int num_ftrace_callsites;
490 unsigned long *ftrace_callsites;
491 #endif
492
493 #ifdef CONFIG_LIVEPATCH
494 bool klp; /* Is this a livepatch module? */
495 bool klp_alive;
496
497 /* Elf information */
498 struct klp_modinfo *klp_info;
499 #endif
500
501 #ifdef CONFIG_MODULE_UNLOAD
502 /* What modules depend on me? */
503 struct list_head source_list;
504 /* What modules do I depend on? */
505 struct list_head target_list;
506
507 /* Destruction function. */
508 void (*exit)(void);
509
510 atomic_t refcnt;
511 #endif
512
513 #ifdef CONFIG_CONSTRUCTORS
514 /* Constructor functions. */
515 ctor_fn_t *ctors;
516 unsigned int num_ctors;
517 #endif
518
519 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
520 struct error_injection_entry *ei_funcs;
521 unsigned int num_ei_funcs;
522 #endif
523 } ____cacheline_aligned __randomize_layout;
524 #ifndef MODULE_ARCH_INIT
525 #define MODULE_ARCH_INIT {}
526 #endif
527
528 #ifndef HAVE_ARCH_KALLSYMS_SYMBOL_VALUE
529 static inline unsigned long kallsyms_symbol_value(const Elf_Sym *sym)
530 {
531 return sym->st_value;
532 }
533 #endif
534
535 extern struct mutex module_mutex;
536
537 /* FIXME: It'd be nice to isolate modules during init, too, so they
538 aren't used before they (may) fail. But presently too much code
539 (IDE & SCSI) require entry into the module during init.*/
540 static inline bool module_is_live(struct module *mod)
541 {
542 return mod->state != MODULE_STATE_GOING;
543 }
544
545 struct module *__module_text_address(unsigned long addr);
546 struct module *__module_address(unsigned long addr);
547 bool is_module_address(unsigned long addr);
548 bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr);
549 bool is_module_percpu_address(unsigned long addr);
550 bool is_module_text_address(unsigned long addr);
551
552 static inline bool within_module_core(unsigned long addr,
553 const struct module *mod)
554 {
555 return (unsigned long)mod->core_layout.base <= addr &&
556 addr < (unsigned long)mod->core_layout.base + mod->core_layout.size;
557 }
558
559 static inline bool within_module_init(unsigned long addr,
560 const struct module *mod)
561 {
562 return (unsigned long)mod->init_layout.base <= addr &&
563 addr < (unsigned long)mod->init_layout.base + mod->init_layout.size;
564 }
565
566 static inline bool within_module(unsigned long addr, const struct module *mod)
567 {
568 return within_module_init(addr, mod) || within_module_core(addr, mod);
569 }
570
571 /* Search for module by name: must hold module_mutex. */
572 struct module *find_module(const char *name);
573
574 struct symsearch {
575 const struct kernel_symbol *start, *stop;
576 const s32 *crcs;
577 enum {
578 NOT_GPL_ONLY,
579 GPL_ONLY,
580 WILL_BE_GPL_ONLY,
581 } licence;
582 bool unused;
583 };
584
585 /*
586 * Search for an exported symbol by name.
587 *
588 * Must be called with module_mutex held or preemption disabled.
589 */
590 const struct kernel_symbol *find_symbol(const char *name,
591 struct module **owner,
592 const s32 **crc,
593 bool gplok,
594 bool warn);
595
596 /*
597 * Walk the exported symbol table
598 *
599 * Must be called with module_mutex held or preemption disabled.
600 */
601 bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
602 struct module *owner,
603 void *data), void *data);
604
605 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
606 symnum out of range. */
607 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
608 char *name, char *module_name, int *exported);
609
610 /* Look for this name: can be of form module:name. */
611 unsigned long module_kallsyms_lookup_name(const char *name);
612
613 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
614 struct module *, unsigned long),
615 void *data);
616
617 extern void __noreturn __module_put_and_exit(struct module *mod,
618 long code);
619 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
620
621 #ifdef CONFIG_MODULE_UNLOAD
622 int module_refcount(struct module *mod);
623 void __symbol_put(const char *symbol);
624 #define symbol_put(x) __symbol_put(__stringify(x))
625 void symbol_put_addr(void *addr);
626
627 /* Sometimes we know we already have a refcount, and it's easier not
628 to handle the error case (which only happens with rmmod --wait). */
629 extern void __module_get(struct module *module);
630
631 /* This is the Right Way to get a module: if it fails, it's being removed,
632 * so pretend it's not there. */
633 extern bool try_module_get(struct module *module);
634
635 extern void module_put(struct module *module);
636
637 #else /*!CONFIG_MODULE_UNLOAD*/
638 static inline bool try_module_get(struct module *module)
639 {
640 return !module || module_is_live(module);
641 }
642 static inline void module_put(struct module *module)
643 {
644 }
645 static inline void __module_get(struct module *module)
646 {
647 }
648 #define symbol_put(x) do { } while (0)
649 #define symbol_put_addr(p) do { } while (0)
650
651 #endif /* CONFIG_MODULE_UNLOAD */
652 int ref_module(struct module *a, struct module *b);
653
654 /* This is a #define so the string doesn't get put in every .o file */
655 #define module_name(mod) \
656 ({ \
657 struct module *__mod = (mod); \
658 __mod ? __mod->name : "kernel"; \
659 })
660
661 /* Dereference module function descriptor */
662 void *dereference_module_function_descriptor(struct module *mod, void *ptr);
663
664 /* For kallsyms to ask for address resolution. namebuf should be at
665 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
666 * found, otherwise NULL. */
667 const char *module_address_lookup(unsigned long addr,
668 unsigned long *symbolsize,
669 unsigned long *offset,
670 char **modname,
671 char *namebuf);
672 int lookup_module_symbol_name(unsigned long addr, char *symname);
673 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
674
675 int register_module_notifier(struct notifier_block *nb);
676 int unregister_module_notifier(struct notifier_block *nb);
677
678 extern void print_modules(void);
679
680 static inline bool module_requested_async_probing(struct module *module)
681 {
682 return module && module->async_probe_requested;
683 }
684
685 #ifdef CONFIG_LIVEPATCH
686 static inline bool is_livepatch_module(struct module *mod)
687 {
688 return mod->klp;
689 }
690 #else /* !CONFIG_LIVEPATCH */
691 static inline bool is_livepatch_module(struct module *mod)
692 {
693 return false;
694 }
695 #endif /* CONFIG_LIVEPATCH */
696
697 bool is_module_sig_enforced(void);
698 void set_module_sig_enforced(void);
699
700 #else /* !CONFIG_MODULES... */
701
702 static inline struct module *__module_address(unsigned long addr)
703 {
704 return NULL;
705 }
706
707 static inline struct module *__module_text_address(unsigned long addr)
708 {
709 return NULL;
710 }
711
712 static inline bool is_module_address(unsigned long addr)
713 {
714 return false;
715 }
716
717 static inline bool is_module_percpu_address(unsigned long addr)
718 {
719 return false;
720 }
721
722 static inline bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr)
723 {
724 return false;
725 }
726
727 static inline bool is_module_text_address(unsigned long addr)
728 {
729 return false;
730 }
731
732 static inline bool within_module_core(unsigned long addr,
733 const struct module *mod)
734 {
735 return false;
736 }
737
738 static inline bool within_module_init(unsigned long addr,
739 const struct module *mod)
740 {
741 return false;
742 }
743
744 static inline bool within_module(unsigned long addr, const struct module *mod)
745 {
746 return false;
747 }
748
749 /* Get/put a kernel symbol (calls should be symmetric) */
750 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
751 #define symbol_put(x) do { } while (0)
752 #define symbol_put_addr(x) do { } while (0)
753
754 static inline void __module_get(struct module *module)
755 {
756 }
757
758 static inline bool try_module_get(struct module *module)
759 {
760 return true;
761 }
762
763 static inline void module_put(struct module *module)
764 {
765 }
766
767 #define module_name(mod) "kernel"
768
769 /* For kallsyms to ask for address resolution. NULL means not found. */
770 static inline const char *module_address_lookup(unsigned long addr,
771 unsigned long *symbolsize,
772 unsigned long *offset,
773 char **modname,
774 char *namebuf)
775 {
776 return NULL;
777 }
778
779 static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
780 {
781 return -ERANGE;
782 }
783
784 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
785 {
786 return -ERANGE;
787 }
788
789 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
790 char *type, char *name,
791 char *module_name, int *exported)
792 {
793 return -ERANGE;
794 }
795
796 static inline unsigned long module_kallsyms_lookup_name(const char *name)
797 {
798 return 0;
799 }
800
801 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
802 struct module *,
803 unsigned long),
804 void *data)
805 {
806 return 0;
807 }
808
809 static inline int register_module_notifier(struct notifier_block *nb)
810 {
811 /* no events will happen anyway, so this can always succeed */
812 return 0;
813 }
814
815 static inline int unregister_module_notifier(struct notifier_block *nb)
816 {
817 return 0;
818 }
819
820 #define module_put_and_exit(code) do_exit(code)
821
822 static inline void print_modules(void)
823 {
824 }
825
826 static inline bool module_requested_async_probing(struct module *module)
827 {
828 return false;
829 }
830
831 static inline bool is_module_sig_enforced(void)
832 {
833 return false;
834 }
835
836 static inline void set_module_sig_enforced(void)
837 {
838 }
839
840 /* Dereference module function descriptor */
841 static inline
842 void *dereference_module_function_descriptor(struct module *mod, void *ptr)
843 {
844 return ptr;
845 }
846
847 #endif /* CONFIG_MODULES */
848
849 #ifdef CONFIG_SYSFS
850 extern struct kset *module_kset;
851 extern struct kobj_type module_ktype;
852 extern int module_sysfs_initialized;
853 #endif /* CONFIG_SYSFS */
854
855 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
856
857 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
858
859 #define __MODULE_STRING(x) __stringify(x)
860
861 #ifdef CONFIG_STRICT_MODULE_RWX
862 extern void module_enable_ro(const struct module *mod, bool after_init);
863 extern void module_disable_ro(const struct module *mod);
864 #else
865 static inline void module_enable_ro(const struct module *mod, bool after_init) { }
866 static inline void module_disable_ro(const struct module *mod) { }
867 #endif
868
869 #ifdef CONFIG_GENERIC_BUG
870 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
871 struct module *);
872 void module_bug_cleanup(struct module *);
873
874 #else /* !CONFIG_GENERIC_BUG */
875
876 static inline void module_bug_finalize(const Elf_Ehdr *hdr,
877 const Elf_Shdr *sechdrs,
878 struct module *mod)
879 {
880 }
881 static inline void module_bug_cleanup(struct module *mod) {}
882 #endif /* CONFIG_GENERIC_BUG */
883
884 #ifdef CONFIG_RETPOLINE
885 extern bool retpoline_module_ok(bool has_retpoline);
886 #else
887 static inline bool retpoline_module_ok(bool has_retpoline)
888 {
889 return true;
890 }
891 #endif
892
893 #ifdef CONFIG_MODULE_SIG
894 static inline bool module_sig_ok(struct module *module)
895 {
896 return module->sig_ok;
897 }
898 #else /* !CONFIG_MODULE_SIG */
899 static inline bool module_sig_ok(struct module *module)
900 {
901 return true;
902 }
903 #endif /* CONFIG_MODULE_SIG */
904
905 #endif /* _LINUX_MODULE_H */
906
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