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bf49d9dd | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
1da177e4 LT |
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 | */ | |
bf49d9dd MY |
8 | |
9 | #ifndef _LINUX_MODULE_H | |
10 | #define _LINUX_MODULE_H | |
11 | ||
1da177e4 LT |
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> | |
0fd972a7 | 17 | #include <linux/init.h> |
1da177e4 LT |
18 | #include <linux/elf.h> |
19 | #include <linux/stringify.h> | |
20 | #include <linux/kobject.h> | |
21 | #include <linux/moduleparam.h> | |
b2e285fc | 22 | #include <linux/jump_label.h> |
f5016932 | 23 | #include <linux/export.h> |
93c2e105 | 24 | #include <linux/rbtree_latch.h> |
663faf9f | 25 | #include <linux/error-injection.h> |
9c0be3f6 | 26 | #include <linux/tracepoint-defs.h> |
fe15b50c | 27 | #include <linux/srcu.h> |
9183c3f9 | 28 | #include <linux/static_call_types.h> |
cf68fffb | 29 | #include <linux/cfi.h> |
1da177e4 | 30 | |
e1783a24 | 31 | #include <linux/percpu.h> |
1da177e4 LT |
32 | #include <asm/module.h> |
33 | ||
730b69d2 | 34 | #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN |
1da177e4 | 35 | |
e865d06b | 36 | struct modversion_info { |
1da177e4 LT |
37 | unsigned long crc; |
38 | char name[MODULE_NAME_LEN]; | |
39 | }; | |
40 | ||
41 | struct module; | |
0ef76537 | 42 | struct exception_table_entry; |
1da177e4 | 43 | |
4befb026 KS |
44 | struct module_kobject { |
45 | struct kobject kobj; | |
46 | struct module *mod; | |
47 | struct kobject *drivers_dir; | |
48 | struct module_param_attrs *mp; | |
942e4431 | 49 | struct completion *kobj_completion; |
3859a271 | 50 | } __randomize_layout; |
4befb026 | 51 | |
1da177e4 | 52 | struct module_attribute { |
4befb026 KS |
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 *, | |
1da177e4 | 57 | const char *, size_t count); |
c988d2b2 MD |
58 | void (*setup)(struct module *, const char *); |
59 | int (*test)(struct module *); | |
60 | void (*free)(struct module *); | |
1da177e4 LT |
61 | }; |
62 | ||
e94965ed DT |
63 | struct module_version_attribute { |
64 | struct module_attribute mattr; | |
65 | const char *module_name; | |
66 | const char *version; | |
0801a007 | 67 | }; |
e94965ed | 68 | |
9b73a584 | 69 | extern ssize_t __modver_version_show(struct module_attribute *, |
4befb026 | 70 | struct module_kobject *, char *); |
9b73a584 | 71 | |
88bfa324 | 72 | extern struct module_attribute module_uevent; |
1da177e4 LT |
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 | ||
0fd972a7 PG |
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) | |
0fd972a7 PG |
127 | |
128 | /* Each module must use one module_init(). */ | |
129 | #define module_init(initfn) \ | |
1f318a8b | 130 | static inline initcall_t __maybe_unused __inittest(void) \ |
0fd972a7 | 131 | { return initfn; } \ |
cf68fffb ST |
132 | int init_module(void) __copy(initfn) \ |
133 | __attribute__((alias(#initfn))); \ | |
134 | __CFI_ADDRESSABLE(init_module, __initdata); | |
0fd972a7 PG |
135 | |
136 | /* This is only required if you want to be unloadable. */ | |
137 | #define module_exit(exitfn) \ | |
1f318a8b | 138 | static inline exitcall_t __maybe_unused __exittest(void) \ |
0fd972a7 | 139 | { return exitfn; } \ |
cf68fffb ST |
140 | void cleanup_module(void) __copy(exitfn) \ |
141 | __attribute__((alias(#exitfn))); \ | |
142 | __CFI_ADDRESSABLE(cleanup_module, __exitdata); | |
0fd972a7 PG |
143 | |
144 | #endif | |
145 | ||
146 | /* This means "can be init if no module support, otherwise module load | |
147 | may call it." */ | |
148 | #ifdef CONFIG_MODULES | |
149 | #define __init_or_module | |
150 | #define __initdata_or_module | |
151 | #define __initconst_or_module | |
152 | #define __INIT_OR_MODULE .text | |
153 | #define __INITDATA_OR_MODULE .data | |
154 | #define __INITRODATA_OR_MODULE .section ".rodata","a",%progbits | |
155 | #else | |
156 | #define __init_or_module __init | |
157 | #define __initdata_or_module __initdata | |
158 | #define __initconst_or_module __initconst | |
159 | #define __INIT_OR_MODULE __INIT | |
160 | #define __INITDATA_OR_MODULE __INITDATA | |
161 | #define __INITRODATA_OR_MODULE __INITRODATA | |
162 | #endif /*CONFIG_MODULES*/ | |
163 | ||
1da177e4 LT |
164 | /* Generic info of form tag = "info" */ |
165 | #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) | |
166 | ||
167 | /* For userspace: you can also call me... */ | |
168 | #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias) | |
169 | ||
7cb14ba7 AR |
170 | /* Soft module dependencies. See man modprobe.d for details. |
171 | * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz") | |
172 | */ | |
173 | #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep) | |
174 | ||
8b41fc44 MY |
175 | /* |
176 | * MODULE_FILE is used for generating modules.builtin | |
177 | * So, make it no-op when this is being built as a module | |
178 | */ | |
179 | #ifdef MODULE | |
180 | #define MODULE_FILE | |
181 | #else | |
182 | #define MODULE_FILE MODULE_INFO(file, KBUILD_MODFILE); | |
183 | #endif | |
184 | ||
1da177e4 LT |
185 | /* |
186 | * The following license idents are currently accepted as indicating free | |
187 | * software modules | |
188 | * | |
bf7fbeea | 189 | * "GPL" [GNU Public License v2] |
1da177e4 LT |
190 | * "GPL v2" [GNU Public License v2] |
191 | * "GPL and additional rights" [GNU Public License v2 rights and more] | |
192 | * "Dual BSD/GPL" [GNU Public License v2 | |
193 | * or BSD license choice] | |
8d27e908 XVP |
194 | * "Dual MIT/GPL" [GNU Public License v2 |
195 | * or MIT license choice] | |
1da177e4 LT |
196 | * "Dual MPL/GPL" [GNU Public License v2 |
197 | * or Mozilla license choice] | |
198 | * | |
199 | * The following other idents are available | |
200 | * | |
201 | * "Proprietary" [Non free products] | |
202 | * | |
bf7fbeea TG |
203 | * Both "GPL v2" and "GPL" (the latter also in dual licensed strings) are |
204 | * merely stating that the module is licensed under the GPL v2, but are not | |
205 | * telling whether "GPL v2 only" or "GPL v2 or later". The reason why there | |
206 | * are two variants is a historic and failed attempt to convey more | |
207 | * information in the MODULE_LICENSE string. For module loading the | |
208 | * "only/or later" distinction is completely irrelevant and does neither | |
209 | * replace the proper license identifiers in the corresponding source file | |
210 | * nor amends them in any way. The sole purpose is to make the | |
211 | * 'Proprietary' flagging work and to refuse to bind symbols which are | |
212 | * exported with EXPORT_SYMBOL_GPL when a non free module is loaded. | |
213 | * | |
214 | * In the same way "BSD" is not a clear license information. It merely | |
215 | * states, that the module is licensed under one of the compatible BSD | |
216 | * license variants. The detailed and correct license information is again | |
217 | * to be found in the corresponding source files. | |
218 | * | |
1da177e4 LT |
219 | * There are dual licensed components, but when running with Linux it is the |
220 | * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL | |
221 | * is a GPL combined work. | |
222 | * | |
223 | * This exists for several reasons | |
e865d06b | 224 | * 1. So modinfo can show license info for users wanting to vet their setup |
1da177e4 LT |
225 | * is free |
226 | * 2. So the community can ignore bug reports including proprietary modules | |
227 | * 3. So vendors can do likewise based on their own policies | |
228 | */ | |
8b41fc44 | 229 | #define MODULE_LICENSE(_license) MODULE_FILE MODULE_INFO(license, _license) |
1da177e4 | 230 | |
1d7015ca JB |
231 | /* |
232 | * Author(s), use "Name <email>" or just "Name", for multiple | |
233 | * authors use multiple MODULE_AUTHOR() statements/lines. | |
234 | */ | |
1da177e4 | 235 | #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) |
e865d06b | 236 | |
1da177e4 LT |
237 | /* What your module does. */ |
238 | #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) | |
239 | ||
cff26a51 RR |
240 | #ifdef MODULE |
241 | /* Creates an alias so file2alias.c can find device table. */ | |
242 | #define MODULE_DEVICE_TABLE(type, name) \ | |
0bf8bf50 | 243 | extern typeof(name) __mod_##type##__##name##_device_table \ |
cff26a51 RR |
244 | __attribute__ ((unused, alias(__stringify(name)))) |
245 | #else /* !MODULE */ | |
246 | #define MODULE_DEVICE_TABLE(type, name) | |
247 | #endif | |
1da177e4 LT |
248 | |
249 | /* Version of form [<epoch>:]<version>[-<extra-version>]. | |
e865d06b SL |
250 | * Or for CVS/RCS ID version, everything but the number is stripped. |
251 | * <epoch>: A (small) unsigned integer which allows you to start versions | |
252 | * anew. If not mentioned, it's zero. eg. "2:1.0" is after | |
253 | * "1:2.0". | |
254 | ||
255 | * <version>: The <version> may contain only alphanumerics and the | |
256 | * character `.'. Ordered by numeric sort for numeric parts, | |
257 | * ascii sort for ascii parts (as per RPM or DEB algorithm). | |
258 | ||
259 | * <extraversion>: Like <version>, but inserted for local | |
260 | * customizations, eg "rh3" or "rusty1". | |
261 | ||
262 | * Using this automatically adds a checksum of the .c files and the | |
263 | * local headers in "srcversion". | |
264 | */ | |
e94965ed | 265 | |
3b90a5b2 | 266 | #if defined(MODULE) || !defined(CONFIG_SYSFS) |
1da177e4 | 267 | #define MODULE_VERSION(_version) MODULE_INFO(version, _version) |
e94965ed DT |
268 | #else |
269 | #define MODULE_VERSION(_version) \ | |
898490c0 | 270 | MODULE_INFO(version, _version); \ |
b112082c JH |
271 | static struct module_version_attribute __modver_attr \ |
272 | __used __section("__modver") \ | |
273 | __aligned(__alignof__(struct module_version_attribute)) \ | |
274 | = { \ | |
275 | .mattr = { \ | |
276 | .attr = { \ | |
277 | .name = "version", \ | |
278 | .mode = S_IRUGO, \ | |
279 | }, \ | |
280 | .show = __modver_version_show, \ | |
e94965ed | 281 | }, \ |
b112082c JH |
282 | .module_name = KBUILD_MODNAME, \ |
283 | .version = _version, \ | |
2d26c716 | 284 | } |
e94965ed | 285 | #endif |
1da177e4 | 286 | |
187afbed JM |
287 | /* Optional firmware file (or files) needed by the module |
288 | * format is simply firmware file name. Multiple firmware | |
289 | * files require multiple MODULE_FIRMWARE() specifiers */ | |
290 | #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) | |
291 | ||
3e4d890a LT |
292 | #define MODULE_IMPORT_NS(ns) MODULE_INFO(import_ns, #ns) |
293 | ||
1da177e4 LT |
294 | struct notifier_block; |
295 | ||
296 | #ifdef CONFIG_MODULES | |
297 | ||
5ed10910 | 298 | extern int modules_disabled; /* for sysctl */ |
1da177e4 LT |
299 | /* Get/put a kernel symbol (calls must be symmetric) */ |
300 | void *__symbol_get(const char *symbol); | |
301 | void *__symbol_get_gpl(const char *symbol); | |
996302c5 | 302 | #define symbol_get(x) ((typeof(&x))(__symbol_get(__stringify(x)))) |
1da177e4 | 303 | |
c8e21ced RR |
304 | /* modules using other modules: kdb wants to see this. */ |
305 | struct module_use { | |
306 | struct list_head source_list; | |
307 | struct list_head target_list; | |
308 | struct module *source, *target; | |
309 | }; | |
310 | ||
0d21b0e3 RR |
311 | enum module_state { |
312 | MODULE_STATE_LIVE, /* Normal state. */ | |
313 | MODULE_STATE_COMING, /* Full formed, running module_init. */ | |
314 | MODULE_STATE_GOING, /* Going away. */ | |
315 | MODULE_STATE_UNFORMED, /* Still setting it up. */ | |
1da177e4 LT |
316 | }; |
317 | ||
93c2e105 PZ |
318 | struct mod_tree_node { |
319 | struct module *mod; | |
320 | struct latch_tree_node node; | |
321 | }; | |
322 | ||
7523e4dc RR |
323 | struct module_layout { |
324 | /* The actual code + data. */ | |
325 | void *base; | |
326 | /* Total size. */ | |
327 | unsigned int size; | |
328 | /* The size of the executable code. */ | |
329 | unsigned int text_size; | |
330 | /* Size of RO section of the module (text+rodata) */ | |
331 | unsigned int ro_size; | |
444d13ff JY |
332 | /* Size of RO after init section */ |
333 | unsigned int ro_after_init_size; | |
7523e4dc RR |
334 | |
335 | #ifdef CONFIG_MODULES_TREE_LOOKUP | |
336 | struct mod_tree_node mtn; | |
337 | #endif | |
338 | }; | |
339 | ||
340 | #ifdef CONFIG_MODULES_TREE_LOOKUP | |
341 | /* Only touch one cacheline for common rbtree-for-core-layout case. */ | |
342 | #define __module_layout_align ____cacheline_aligned | |
343 | #else | |
344 | #define __module_layout_align | |
345 | #endif | |
346 | ||
8244062e RR |
347 | struct mod_kallsyms { |
348 | Elf_Sym *symtab; | |
349 | unsigned int num_symtab; | |
350 | char *strtab; | |
1c7651f4 | 351 | char *typetab; |
8244062e RR |
352 | }; |
353 | ||
1ce15ef4 JY |
354 | #ifdef CONFIG_LIVEPATCH |
355 | struct klp_modinfo { | |
356 | Elf_Ehdr hdr; | |
357 | Elf_Shdr *sechdrs; | |
358 | char *secstrings; | |
359 | unsigned int symndx; | |
360 | }; | |
361 | #endif | |
362 | ||
e865d06b | 363 | struct module { |
1da177e4 LT |
364 | enum module_state state; |
365 | ||
366 | /* Member of list of modules */ | |
367 | struct list_head list; | |
368 | ||
369 | /* Unique handle for this module */ | |
370 | char name[MODULE_NAME_LEN]; | |
371 | ||
372 | /* Sysfs stuff. */ | |
373 | struct module_kobject mkobj; | |
03e88ae1 | 374 | struct module_attribute *modinfo_attrs; |
c988d2b2 MD |
375 | const char *version; |
376 | const char *srcversion; | |
270a6c4c | 377 | struct kobject *holders_dir; |
1da177e4 LT |
378 | |
379 | /* Exported symbols */ | |
380 | const struct kernel_symbol *syms; | |
71810db2 | 381 | const s32 *crcs; |
af540689 | 382 | unsigned int num_syms; |
1da177e4 | 383 | |
cf68fffb ST |
384 | #ifdef CONFIG_CFI_CLANG |
385 | cfi_check_fn cfi_check; | |
386 | #endif | |
387 | ||
e180a6b7 | 388 | /* Kernel parameters. */ |
cf2fde7b | 389 | #ifdef CONFIG_SYSFS |
b51d23e4 | 390 | struct mutex param_lock; |
cf2fde7b | 391 | #endif |
e180a6b7 RR |
392 | struct kernel_param *kp; |
393 | unsigned int num_kp; | |
394 | ||
1da177e4 | 395 | /* GPL-only exported symbols. */ |
1da177e4 | 396 | unsigned int num_gpl_syms; |
af540689 | 397 | const struct kernel_symbol *gpl_syms; |
71810db2 | 398 | const s32 *gpl_crcs; |
262e6ae7 | 399 | bool using_gplonly_symbols; |
1da177e4 | 400 | |
106a4ee2 RR |
401 | #ifdef CONFIG_MODULE_SIG |
402 | /* Signature was verified. */ | |
403 | bool sig_ok; | |
404 | #endif | |
405 | ||
f2411da7 LR |
406 | bool async_probe_requested; |
407 | ||
1da177e4 LT |
408 | /* Exception table */ |
409 | unsigned int num_exentries; | |
5e458cc0 | 410 | struct exception_table_entry *extable; |
1da177e4 LT |
411 | |
412 | /* Startup function. */ | |
413 | int (*init)(void); | |
414 | ||
7523e4dc RR |
415 | /* Core layout: rbtree is accessed frequently, so keep together. */ |
416 | struct module_layout core_layout __module_layout_align; | |
417 | struct module_layout init_layout; | |
84e1c6bb | 418 | |
1da177e4 LT |
419 | /* Arch-specific module values */ |
420 | struct mod_arch_specific arch; | |
421 | ||
7fd8329b | 422 | unsigned long taints; /* same bits as kernel:taint_flags */ |
2bc2d61a | 423 | |
7664c5a1 JF |
424 | #ifdef CONFIG_GENERIC_BUG |
425 | /* Support for BUG */ | |
af540689 | 426 | unsigned num_bugs; |
7664c5a1 JF |
427 | struct list_head bug_list; |
428 | struct bug_entry *bug_table; | |
1da177e4 LT |
429 | #endif |
430 | ||
431 | #ifdef CONFIG_KALLSYMS | |
8244062e | 432 | /* Protected by RCU and/or module_mutex: use rcu_dereference() */ |
6080d608 | 433 | struct mod_kallsyms __rcu *kallsyms; |
8244062e | 434 | struct mod_kallsyms core_kallsyms; |
c714965f | 435 | |
1da177e4 LT |
436 | /* Section attributes */ |
437 | struct module_sect_attrs *sect_attrs; | |
6d760133 RM |
438 | |
439 | /* Notes attributes */ | |
440 | struct module_notes_attrs *notes_attrs; | |
1da177e4 LT |
441 | #endif |
442 | ||
a288bd65 RK |
443 | /* The command line arguments (may be mangled). People like |
444 | keeping pointers to this stuff */ | |
445 | char *args; | |
446 | ||
259354de | 447 | #ifdef CONFIG_SMP |
1da177e4 | 448 | /* Per-cpu data. */ |
259354de TH |
449 | void __percpu *percpu; |
450 | unsigned int percpu_size; | |
451 | #endif | |
66e9b071 TG |
452 | void *noinstr_text_start; |
453 | unsigned int noinstr_text_size; | |
1da177e4 | 454 | |
97e1c18e | 455 | #ifdef CONFIG_TRACEPOINTS |
97e1c18e | 456 | unsigned int num_tracepoints; |
9c0be3f6 | 457 | tracepoint_ptr_t *tracepoints_ptrs; |
97e1c18e | 458 | #endif |
fe15b50c PM |
459 | #ifdef CONFIG_TREE_SRCU |
460 | unsigned int num_srcu_structs; | |
461 | struct srcu_struct **srcu_struct_ptrs; | |
462 | #endif | |
a38d1107 MM |
463 | #ifdef CONFIG_BPF_EVENTS |
464 | unsigned int num_bpf_raw_events; | |
465 | struct bpf_raw_event_map *bpf_raw_events; | |
466 | #endif | |
36e68442 AN |
467 | #ifdef CONFIG_DEBUG_INFO_BTF_MODULES |
468 | unsigned int btf_data_size; | |
469 | void *btf_data; | |
470 | #endif | |
e9666d10 | 471 | #ifdef CONFIG_JUMP_LABEL |
bf5438fc JB |
472 | struct jump_entry *jump_entries; |
473 | unsigned int num_jump_entries; | |
474 | #endif | |
769b0441 | 475 | #ifdef CONFIG_TRACING |
1ba28e02 | 476 | unsigned int num_trace_bprintk_fmt; |
a288bd65 | 477 | const char **trace_bprintk_fmt_start; |
1ba28e02 | 478 | #endif |
6d723736 | 479 | #ifdef CONFIG_EVENT_TRACING |
2425bcb9 | 480 | struct trace_event_call **trace_events; |
6d723736 | 481 | unsigned int num_trace_events; |
99be647c JL |
482 | struct trace_eval_map **trace_evals; |
483 | unsigned int num_trace_evals; | |
6d723736 | 484 | #endif |
93eb677d | 485 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
93eb677d | 486 | unsigned int num_ftrace_callsites; |
a288bd65 | 487 | unsigned long *ftrace_callsites; |
93eb677d | 488 | #endif |
1e6769b0 MH |
489 | #ifdef CONFIG_KPROBES |
490 | void *kprobes_text_start; | |
491 | unsigned int kprobes_text_size; | |
16db6264 MH |
492 | unsigned long *kprobe_blacklist; |
493 | unsigned int num_kprobe_blacklist; | |
1e6769b0 | 494 | #endif |
9183c3f9 JP |
495 | #ifdef CONFIG_HAVE_STATIC_CALL_INLINE |
496 | int num_static_call_sites; | |
497 | struct static_call_site *static_call_sites; | |
498 | #endif | |
1ba28e02 | 499 | |
8cb2c2dc | 500 | #ifdef CONFIG_LIVEPATCH |
1ce15ef4 | 501 | bool klp; /* Is this a livepatch module? */ |
8cb2c2dc | 502 | bool klp_alive; |
1ce15ef4 JY |
503 | |
504 | /* Elf information */ | |
505 | struct klp_modinfo *klp_info; | |
8cb2c2dc PM |
506 | #endif |
507 | ||
af540689 RK |
508 | #ifdef CONFIG_MODULE_UNLOAD |
509 | /* What modules depend on me? */ | |
2c02dfe7 LT |
510 | struct list_head source_list; |
511 | /* What modules do I depend on? */ | |
512 | struct list_head target_list; | |
af540689 | 513 | |
af540689 RK |
514 | /* Destruction function. */ |
515 | void (*exit)(void); | |
516 | ||
2f35c41f | 517 | atomic_t refcnt; |
af540689 | 518 | #endif |
b99b87f7 PO |
519 | |
520 | #ifdef CONFIG_CONSTRUCTORS | |
521 | /* Constructor functions. */ | |
522 | ctor_fn_t *ctors; | |
523 | unsigned int num_ctors; | |
524 | #endif | |
92ace999 | 525 | |
540adea3 | 526 | #ifdef CONFIG_FUNCTION_ERROR_INJECTION |
663faf9f | 527 | struct error_injection_entry *ei_funcs; |
540adea3 | 528 | unsigned int num_ei_funcs; |
92ace999 | 529 | #endif |
3859a271 | 530 | } ____cacheline_aligned __randomize_layout; |
e61a1c1c RZ |
531 | #ifndef MODULE_ARCH_INIT |
532 | #define MODULE_ARCH_INIT {} | |
533 | #endif | |
1da177e4 | 534 | |
93d77e7f VW |
535 | #ifndef HAVE_ARCH_KALLSYMS_SYMBOL_VALUE |
536 | static inline unsigned long kallsyms_symbol_value(const Elf_Sym *sym) | |
537 | { | |
538 | return sym->st_value; | |
539 | } | |
540 | #endif | |
541 | ||
1da177e4 LT |
542 | /* FIXME: It'd be nice to isolate modules during init, too, so they |
543 | aren't used before they (may) fail. But presently too much code | |
544 | (IDE & SCSI) require entry into the module during init.*/ | |
171d864e | 545 | static inline bool module_is_live(struct module *mod) |
1da177e4 LT |
546 | { |
547 | return mod->state != MODULE_STATE_GOING; | |
548 | } | |
549 | ||
1da177e4 | 550 | struct module *__module_text_address(unsigned long addr); |
e610499e RR |
551 | struct module *__module_address(unsigned long addr); |
552 | bool is_module_address(unsigned long addr); | |
383776fa | 553 | bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr); |
10fad5e4 | 554 | bool is_module_percpu_address(unsigned long addr); |
e610499e | 555 | bool is_module_text_address(unsigned long addr); |
1da177e4 | 556 | |
76681c8f PM |
557 | static inline bool within_module_core(unsigned long addr, |
558 | const struct module *mod) | |
a06f6211 | 559 | { |
7523e4dc RR |
560 | return (unsigned long)mod->core_layout.base <= addr && |
561 | addr < (unsigned long)mod->core_layout.base + mod->core_layout.size; | |
a06f6211 MH |
562 | } |
563 | ||
76681c8f PM |
564 | static inline bool within_module_init(unsigned long addr, |
565 | const struct module *mod) | |
a06f6211 | 566 | { |
7523e4dc RR |
567 | return (unsigned long)mod->init_layout.base <= addr && |
568 | addr < (unsigned long)mod->init_layout.base + mod->init_layout.size; | |
a06f6211 MH |
569 | } |
570 | ||
76681c8f | 571 | static inline bool within_module(unsigned long addr, const struct module *mod) |
9b20a352 PM |
572 | { |
573 | return within_module_init(addr, mod) || within_module_core(addr, mod); | |
574 | } | |
575 | ||
a0060505 | 576 | /* Search for module by name: must be in a RCU-sched critical section. */ |
c6b37801 TA |
577 | struct module *find_module(const char *name); |
578 | ||
ea07890a | 579 | /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if |
1da177e4 | 580 | symnum out of range. */ |
ea07890a AD |
581 | int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, |
582 | char *name, char *module_name, int *exported); | |
1da177e4 LT |
583 | |
584 | /* Look for this name: can be of form module:name. */ | |
585 | unsigned long module_kallsyms_lookup_name(const char *name); | |
586 | ||
bf262dce JK |
587 | extern void __noreturn __module_put_and_exit(struct module *mod, |
588 | long code); | |
74e22fac | 589 | #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code) |
1da177e4 LT |
590 | |
591 | #ifdef CONFIG_MODULE_UNLOAD | |
d5db139a | 592 | int module_refcount(struct module *mod); |
1da177e4 | 593 | void __symbol_put(const char *symbol); |
996302c5 | 594 | #define symbol_put(x) __symbol_put(__stringify(x)) |
1da177e4 LT |
595 | void symbol_put_addr(void *addr); |
596 | ||
597 | /* Sometimes we know we already have a refcount, and it's easier not | |
598 | to handle the error case (which only happens with rmmod --wait). */ | |
d53799be | 599 | extern void __module_get(struct module *module); |
e1783a24 | 600 | |
d53799be SR |
601 | /* This is the Right Way to get a module: if it fails, it's being removed, |
602 | * so pretend it's not there. */ | |
603 | extern bool try_module_get(struct module *module); | |
1da177e4 | 604 | |
f6a57033 | 605 | extern void module_put(struct module *module); |
1da177e4 LT |
606 | |
607 | #else /*!CONFIG_MODULE_UNLOAD*/ | |
8ba4fcdf | 608 | static inline bool try_module_get(struct module *module) |
1da177e4 LT |
609 | { |
610 | return !module || module_is_live(module); | |
611 | } | |
612 | static inline void module_put(struct module *module) | |
613 | { | |
614 | } | |
615 | static inline void __module_get(struct module *module) | |
616 | { | |
617 | } | |
e865d06b SL |
618 | #define symbol_put(x) do { } while (0) |
619 | #define symbol_put_addr(p) do { } while (0) | |
1da177e4 LT |
620 | |
621 | #endif /* CONFIG_MODULE_UNLOAD */ | |
622 | ||
623 | /* This is a #define so the string doesn't get put in every .o file */ | |
624 | #define module_name(mod) \ | |
625 | ({ \ | |
626 | struct module *__mod = (mod); \ | |
627 | __mod ? __mod->name : "kernel"; \ | |
628 | }) | |
629 | ||
b865ea64 SS |
630 | /* Dereference module function descriptor */ |
631 | void *dereference_module_function_descriptor(struct module *mod, void *ptr); | |
632 | ||
6dd06c9f RR |
633 | /* For kallsyms to ask for address resolution. namebuf should be at |
634 | * least KSYM_NAME_LEN long: a pointer to namebuf is returned if | |
635 | * found, otherwise NULL. */ | |
92dfc9dc | 636 | const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
637 | unsigned long *symbolsize, |
638 | unsigned long *offset, | |
639 | char **modname, | |
640 | char *namebuf); | |
9d65cb4a | 641 | int lookup_module_symbol_name(unsigned long addr, char *symname); |
a5c43dae | 642 | int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); |
1da177e4 | 643 | |
e865d06b SL |
644 | int register_module_notifier(struct notifier_block *nb); |
645 | int unregister_module_notifier(struct notifier_block *nb); | |
1da177e4 LT |
646 | |
647 | extern void print_modules(void); | |
648 | ||
80c6e146 DT |
649 | static inline bool module_requested_async_probing(struct module *module) |
650 | { | |
651 | return module && module->async_probe_requested; | |
652 | } | |
653 | ||
1ce15ef4 JY |
654 | #ifdef CONFIG_LIVEPATCH |
655 | static inline bool is_livepatch_module(struct module *mod) | |
656 | { | |
657 | return mod->klp; | |
658 | } | |
659 | #else /* !CONFIG_LIVEPATCH */ | |
660 | static inline bool is_livepatch_module(struct module *mod) | |
661 | { | |
662 | return false; | |
663 | } | |
664 | #endif /* CONFIG_LIVEPATCH */ | |
665 | ||
fda784e5 | 666 | bool is_module_sig_enforced(void); |
8db5da0b | 667 | void set_module_sig_enforced(void); |
fda784e5 | 668 | |
1da177e4 | 669 | #else /* !CONFIG_MODULES... */ |
1da177e4 | 670 | |
e610499e RR |
671 | static inline struct module *__module_address(unsigned long addr) |
672 | { | |
673 | return NULL; | |
674 | } | |
675 | ||
1da177e4 LT |
676 | static inline struct module *__module_text_address(unsigned long addr) |
677 | { | |
678 | return NULL; | |
679 | } | |
680 | ||
e610499e RR |
681 | static inline bool is_module_address(unsigned long addr) |
682 | { | |
683 | return false; | |
684 | } | |
685 | ||
d5e50daf RD |
686 | static inline bool is_module_percpu_address(unsigned long addr) |
687 | { | |
688 | return false; | |
689 | } | |
690 | ||
383776fa TG |
691 | static inline bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr) |
692 | { | |
693 | return false; | |
694 | } | |
695 | ||
e610499e | 696 | static inline bool is_module_text_address(unsigned long addr) |
4d435f9d | 697 | { |
e610499e | 698 | return false; |
4d435f9d IM |
699 | } |
700 | ||
007ec26c DH |
701 | static inline bool within_module_core(unsigned long addr, |
702 | const struct module *mod) | |
703 | { | |
704 | return false; | |
705 | } | |
706 | ||
dadec066 TV |
707 | static inline bool within_module_init(unsigned long addr, |
708 | const struct module *mod) | |
709 | { | |
710 | return false; | |
711 | } | |
712 | ||
713 | static inline bool within_module(unsigned long addr, const struct module *mod) | |
714 | { | |
715 | return false; | |
716 | } | |
717 | ||
1da177e4 | 718 | /* Get/put a kernel symbol (calls should be symmetric) */ |
13150bc5 | 719 | #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak,visibility("hidden"))); &(x); }) |
e865d06b SL |
720 | #define symbol_put(x) do { } while (0) |
721 | #define symbol_put_addr(x) do { } while (0) | |
1da177e4 LT |
722 | |
723 | static inline void __module_get(struct module *module) | |
724 | { | |
725 | } | |
726 | ||
8ba4fcdf | 727 | static inline bool try_module_get(struct module *module) |
1da177e4 | 728 | { |
8ba4fcdf | 729 | return true; |
1da177e4 LT |
730 | } |
731 | ||
732 | static inline void module_put(struct module *module) | |
733 | { | |
734 | } | |
735 | ||
736 | #define module_name(mod) "kernel" | |
737 | ||
1da177e4 | 738 | /* For kallsyms to ask for address resolution. NULL means not found. */ |
92dfc9dc | 739 | static inline const char *module_address_lookup(unsigned long addr, |
6dd06c9f RR |
740 | unsigned long *symbolsize, |
741 | unsigned long *offset, | |
742 | char **modname, | |
743 | char *namebuf) | |
1da177e4 LT |
744 | { |
745 | return NULL; | |
746 | } | |
747 | ||
9d65cb4a AD |
748 | static inline int lookup_module_symbol_name(unsigned long addr, char *symname) |
749 | { | |
750 | return -ERANGE; | |
751 | } | |
752 | ||
a5c43dae AD |
753 | static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) |
754 | { | |
755 | return -ERANGE; | |
756 | } | |
757 | ||
ea07890a AD |
758 | static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, |
759 | char *type, char *name, | |
760 | char *module_name, int *exported) | |
1da177e4 | 761 | { |
ea07890a | 762 | return -ERANGE; |
1da177e4 LT |
763 | } |
764 | ||
765 | static inline unsigned long module_kallsyms_lookup_name(const char *name) | |
766 | { | |
767 | return 0; | |
768 | } | |
769 | ||
e865d06b | 770 | static inline int register_module_notifier(struct notifier_block *nb) |
1da177e4 LT |
771 | { |
772 | /* no events will happen anyway, so this can always succeed */ | |
773 | return 0; | |
774 | } | |
775 | ||
e865d06b | 776 | static inline int unregister_module_notifier(struct notifier_block *nb) |
1da177e4 LT |
777 | { |
778 | return 0; | |
779 | } | |
780 | ||
781 | #define module_put_and_exit(code) do_exit(code) | |
782 | ||
783 | static inline void print_modules(void) | |
784 | { | |
785 | } | |
80c6e146 DT |
786 | |
787 | static inline bool module_requested_async_probing(struct module *module) | |
788 | { | |
789 | return false; | |
790 | } | |
791 | ||
fda784e5 BM |
792 | static inline bool is_module_sig_enforced(void) |
793 | { | |
794 | return false; | |
795 | } | |
796 | ||
8db5da0b MZ |
797 | static inline void set_module_sig_enforced(void) |
798 | { | |
799 | } | |
800 | ||
b865ea64 SS |
801 | /* Dereference module function descriptor */ |
802 | static inline | |
803 | void *dereference_module_function_descriptor(struct module *mod, void *ptr) | |
804 | { | |
805 | return ptr; | |
806 | } | |
807 | ||
ef665c1a RD |
808 | #endif /* CONFIG_MODULES */ |
809 | ||
ef665c1a | 810 | #ifdef CONFIG_SYSFS |
7405c1e1 GKH |
811 | extern struct kset *module_kset; |
812 | extern struct kobj_type module_ktype; | |
813 | extern int module_sysfs_initialized; | |
ef665c1a RD |
814 | #endif /* CONFIG_SYSFS */ |
815 | ||
1da177e4 LT |
816 | #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) |
817 | ||
818 | /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ | |
819 | ||
1da177e4 LT |
820 | #define __MODULE_STRING(x) __stringify(x) |
821 | ||
0d9c25dd | 822 | #ifdef CONFIG_GENERIC_BUG |
5336377d | 823 | void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, |
0d9c25dd AM |
824 | struct module *); |
825 | void module_bug_cleanup(struct module *); | |
826 | ||
827 | #else /* !CONFIG_GENERIC_BUG */ | |
828 | ||
5336377d | 829 | static inline void module_bug_finalize(const Elf_Ehdr *hdr, |
0d9c25dd AM |
830 | const Elf_Shdr *sechdrs, |
831 | struct module *mod) | |
832 | { | |
0d9c25dd AM |
833 | } |
834 | static inline void module_bug_cleanup(struct module *mod) {} | |
835 | #endif /* CONFIG_GENERIC_BUG */ | |
836 | ||
e4f35891 | 837 | #ifdef CONFIG_RETPOLINE |
caf7501a AK |
838 | extern bool retpoline_module_ok(bool has_retpoline); |
839 | #else | |
840 | static inline bool retpoline_module_ok(bool has_retpoline) | |
841 | { | |
842 | return true; | |
843 | } | |
844 | #endif | |
845 | ||
59afdc7b HX |
846 | #ifdef CONFIG_MODULE_SIG |
847 | static inline bool module_sig_ok(struct module *module) | |
848 | { | |
849 | return module->sig_ok; | |
850 | } | |
851 | #else /* !CONFIG_MODULE_SIG */ | |
852 | static inline bool module_sig_ok(struct module *module) | |
853 | { | |
854 | return true; | |
855 | } | |
856 | #endif /* CONFIG_MODULE_SIG */ | |
857 | ||
3e355205 CH |
858 | int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
859 | struct module *, unsigned long), | |
860 | void *data); | |
861 | ||
1da177e4 | 862 | #endif /* _LINUX_MODULE_H */ |