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/buildid.h> 15 #include <linux/compiler.h> 16 #include <linux/cache.h> 17 #include <linux/kmod.h> 18 #include <linux/init.h> 19 #include <linux/elf.h> 20 #include <linux/stringify.h> 21 #include <linux/kobject.h> 22 #include <linux/moduleparam.h> 23 #include <linux/jump_label.h> 24 #include <linux/export.h> 25 #include <linux/rbtree_latch.h> 26 #include <linux/error-injection.h> 27 #include <linux/tracepoint-defs.h> 28 #include <linux/srcu.h> 29 #include <linux/static_call_types.h> 30 31 #include <linux/percpu.h> 32 #include <asm/module.h> 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 }; 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) \ 133 __attribute__((alias(#initfn))); \ 134 ___ADDRESSABLE(init_module, __initdata); 135 136 /* This is only required if you want to be unloadable. */ 137 #define module_exit(exitfn) \ 138 static inline exitcall_t __maybe_unused __exittest(void) \ 139 { return exitfn; } \ 140 void cleanup_module(void) __copy(exitfn) \ 141 __attribute__((alias(#exitfn))); \ 142 ___ADDRESSABLE(cleanup_module, __exitdata); 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*/ 163 164 /* 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) 169 170 /* 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) 174 175 /* 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 184 185 /* 186 * The following license idents are currently accepted as indicating free 187 * software modules 188 * 189 * "GPL" [GNU Public License v2] 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] 194 * "Dual MIT/GPL" [GNU Public License v2 195 * or MIT license choice] 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 * 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 * 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 224 * 1. So modinfo can show license info for users wanting to vet their setup 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 */ 229 #define MODULE_LICENSE(_license) MODULE_FILE MODULE_INFO(license, _license) 230 231 /* 232 * Author(s), use "Name <email>" or just "Name", for multiple 233 * authors use multiple MODULE_AUTHOR() statements/lines. 234 */ 235 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) 236 237 /* What your module does. */ 238 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) 239 240 #ifdef MODULE 241 /* Creates an alias so file2alias.c can find device table. */ 242 #define MODULE_DEVICE_TABLE(type, name) \ 243 extern typeof(name) __mod_##type##__##name##_device_table \ 244 __attribute__ ((unused, alias(__stringify(name)))) 245 #else /* !MODULE */ 246 #define MODULE_DEVICE_TABLE(type, name) 247 #endif 248 249 /* Version of form [<epoch>:]<version>[-<extra-version>]. 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 */ 265 266 #if defined(MODULE) || !defined(CONFIG_SYSFS) 267 #define MODULE_VERSION(_version) MODULE_INFO(version, _version) 268 #else 269 #define MODULE_VERSION(_version) \ 270 MODULE_INFO(version, _version); \ 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, \ 281 }, \ 282 .module_name = KBUILD_MODNAME, \ 283 .version = _version, \ 284 } 285 #endif 286 287 /* 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) 291 292 #define MODULE_IMPORT_NS(ns) MODULE_INFO(import_ns, __stringify(ns)) 293 294 struct notifier_block; 295 296 #ifdef CONFIG_MODULES 297 298 extern int modules_disabled; /* for sysctl */ 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); 302 #define symbol_get(x) ((typeof(&x))(__symbol_get(__stringify(x)))) 303 304 /* 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 }; 310 311 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. */ 316 }; 317 318 struct mod_tree_node { 319 struct module *mod; 320 struct latch_tree_node node; 321 }; 322 323 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; 332 /* Size of RO after init section */ 333 unsigned int ro_after_init_size; 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 346 347 struct mod_kallsyms { 348 Elf_Sym *symtab; 349 unsigned int num_symtab; 350 char *strtab; 351 char *typetab; 352 }; 353 354 #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 362 363 struct module { 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 #ifdef CONFIG_STACKTRACE_BUILD_ID 373 /* Module build ID */ 374 unsigned char build_id[BUILD_ID_SIZE_MAX]; 375 #endif 376 377 /* Sysfs stuff. */ 378 struct module_kobject mkobj; 379 struct module_attribute *modinfo_attrs; 380 const char *version; 381 const char *srcversion; 382 struct kobject *holders_dir; 383 384 /* Exported symbols */ 385 const struct kernel_symbol *syms; 386 const s32 *crcs; 387 unsigned int num_syms; 388 389 #ifdef CONFIG_ARCH_USES_CFI_TRAPS 390 s32 *kcfi_traps; 391 s32 *kcfi_traps_end; 392 #endif 393 394 /* Kernel parameters. */ 395 #ifdef CONFIG_SYSFS 396 struct mutex param_lock; 397 #endif 398 struct kernel_param *kp; 399 unsigned int num_kp; 400 401 /* GPL-only exported symbols. */ 402 unsigned int num_gpl_syms; 403 const struct kernel_symbol *gpl_syms; 404 const s32 *gpl_crcs; 405 bool using_gplonly_symbols; 406 407 #ifdef CONFIG_MODULE_SIG 408 /* Signature was verified. */ 409 bool sig_ok; 410 #endif 411 412 bool async_probe_requested; 413 414 /* Exception table */ 415 unsigned int num_exentries; 416 struct exception_table_entry *extable; 417 418 /* Startup function. */ 419 int (*init)(void); 420 421 /* Core layout: rbtree is accessed frequently, so keep together. */ 422 struct module_layout core_layout __module_layout_align; 423 struct module_layout init_layout; 424 #ifdef CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC 425 struct module_layout data_layout; 426 #endif 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 void *noinstr_text_start; 462 unsigned int noinstr_text_size; 463 464 #ifdef CONFIG_TRACEPOINTS 465 unsigned int num_tracepoints; 466 tracepoint_ptr_t *tracepoints_ptrs; 467 #endif 468 #ifdef CONFIG_TREE_SRCU 469 unsigned int num_srcu_structs; 470 struct srcu_struct **srcu_struct_ptrs; 471 #endif 472 #ifdef CONFIG_BPF_EVENTS 473 unsigned int num_bpf_raw_events; 474 struct bpf_raw_event_map *bpf_raw_events; 475 #endif 476 #ifdef CONFIG_DEBUG_INFO_BTF_MODULES 477 unsigned int btf_data_size; 478 void *btf_data; 479 #endif 480 #ifdef CONFIG_JUMP_LABEL 481 struct jump_entry *jump_entries; 482 unsigned int num_jump_entries; 483 #endif 484 #ifdef CONFIG_TRACING 485 unsigned int num_trace_bprintk_fmt; 486 const char **trace_bprintk_fmt_start; 487 #endif 488 #ifdef CONFIG_EVENT_TRACING 489 struct trace_event_call **trace_events; 490 unsigned int num_trace_events; 491 struct trace_eval_map **trace_evals; 492 unsigned int num_trace_evals; 493 #endif 494 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 495 unsigned int num_ftrace_callsites; 496 unsigned long *ftrace_callsites; 497 #endif 498 #ifdef CONFIG_KPROBES 499 void *kprobes_text_start; 500 unsigned int kprobes_text_size; 501 unsigned long *kprobe_blacklist; 502 unsigned int num_kprobe_blacklist; 503 #endif 504 #ifdef CONFIG_HAVE_STATIC_CALL_INLINE 505 int num_static_call_sites; 506 struct static_call_site *static_call_sites; 507 #endif 508 #if IS_ENABLED(CONFIG_KUNIT) 509 int num_kunit_suites; 510 struct kunit_suite **kunit_suites; 511 #endif 512 513 514 #ifdef CONFIG_LIVEPATCH 515 bool klp; /* Is this a livepatch module? */ 516 bool klp_alive; 517 518 /* Elf information */ 519 struct klp_modinfo *klp_info; 520 #endif 521 522 #ifdef CONFIG_PRINTK_INDEX 523 unsigned int printk_index_size; 524 struct pi_entry **printk_index_start; 525 #endif 526 527 #ifdef CONFIG_MODULE_UNLOAD 528 /* What modules depend on me? */ 529 struct list_head source_list; 530 /* What modules do I depend on? */ 531 struct list_head target_list; 532 533 /* Destruction function. */ 534 void (*exit)(void); 535 536 atomic_t refcnt; 537 #endif 538 539 #ifdef CONFIG_CONSTRUCTORS 540 /* Constructor functions. */ 541 ctor_fn_t *ctors; 542 unsigned int num_ctors; 543 #endif 544 545 #ifdef CONFIG_FUNCTION_ERROR_INJECTION 546 struct error_injection_entry *ei_funcs; 547 unsigned int num_ei_funcs; 548 #endif 549 } ____cacheline_aligned __randomize_layout; 550 #ifndef MODULE_ARCH_INIT 551 #define MODULE_ARCH_INIT {} 552 #endif 553 554 #ifndef HAVE_ARCH_KALLSYMS_SYMBOL_VALUE 555 static inline unsigned long kallsyms_symbol_value(const Elf_Sym *sym) 556 { 557 return sym->st_value; 558 } 559 #endif 560 561 /* FIXME: It'd be nice to isolate modules during init, too, so they 562 aren't used before they (may) fail. But presently too much code 563 (IDE & SCSI) require entry into the module during init.*/ 564 static inline bool module_is_live(struct module *mod) 565 { 566 return mod->state != MODULE_STATE_GOING; 567 } 568 569 struct module *__module_text_address(unsigned long addr); 570 struct module *__module_address(unsigned long addr); 571 bool is_module_address(unsigned long addr); 572 bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr); 573 bool is_module_percpu_address(unsigned long addr); 574 bool is_module_text_address(unsigned long addr); 575 576 static inline bool within_module_core(unsigned long addr, 577 const struct module *mod) 578 { 579 #ifdef CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC 580 if ((unsigned long)mod->data_layout.base <= addr && 581 addr < (unsigned long)mod->data_layout.base + mod->data_layout.size) 582 return true; 583 #endif 584 return (unsigned long)mod->core_layout.base <= addr && 585 addr < (unsigned long)mod->core_layout.base + mod->core_layout.size; 586 } 587 588 static inline bool within_module_init(unsigned long addr, 589 const struct module *mod) 590 { 591 return (unsigned long)mod->init_layout.base <= addr && 592 addr < (unsigned long)mod->init_layout.base + mod->init_layout.size; 593 } 594 595 static inline bool within_module(unsigned long addr, const struct module *mod) 596 { 597 return within_module_init(addr, mod) || within_module_core(addr, mod); 598 } 599 600 /* Search for module by name: must be in a RCU-sched critical section. */ 601 struct module *find_module(const char *name); 602 603 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if 604 symnum out of range. */ 605 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, 606 char *name, char *module_name, int *exported); 607 608 /* Look for this name: can be of form module:name. */ 609 unsigned long module_kallsyms_lookup_name(const char *name); 610 611 extern void __noreturn __module_put_and_kthread_exit(struct module *mod, 612 long code); 613 #define module_put_and_kthread_exit(code) __module_put_and_kthread_exit(THIS_MODULE, code) 614 615 #ifdef CONFIG_MODULE_UNLOAD 616 int module_refcount(struct module *mod); 617 void __symbol_put(const char *symbol); 618 #define symbol_put(x) __symbol_put(__stringify(x)) 619 void symbol_put_addr(void *addr); 620 621 /* Sometimes we know we already have a refcount, and it's easier not 622 to handle the error case (which only happens with rmmod --wait). */ 623 extern void __module_get(struct module *module); 624 625 /* This is the Right Way to get a module: if it fails, it's being removed, 626 * so pretend it's not there. */ 627 extern bool try_module_get(struct module *module); 628 629 extern void module_put(struct module *module); 630 631 #else /*!CONFIG_MODULE_UNLOAD*/ 632 static inline bool try_module_get(struct module *module) 633 { 634 return !module || module_is_live(module); 635 } 636 static inline void module_put(struct module *module) 637 { 638 } 639 static inline void __module_get(struct module *module) 640 { 641 } 642 #define symbol_put(x) do { } while (0) 643 #define symbol_put_addr(p) do { } while (0) 644 645 #endif /* CONFIG_MODULE_UNLOAD */ 646 647 /* This is a #define so the string doesn't get put in every .o file */ 648 #define module_name(mod) \ 649 ({ \ 650 struct module *__mod = (mod); \ 651 __mod ? __mod->name : "kernel"; \ 652 }) 653 654 /* Dereference module function descriptor */ 655 void *dereference_module_function_descriptor(struct module *mod, void *ptr); 656 657 /* For kallsyms to ask for address resolution. namebuf should be at 658 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if 659 * found, otherwise NULL. */ 660 const char *module_address_lookup(unsigned long addr, 661 unsigned long *symbolsize, 662 unsigned long *offset, 663 char **modname, const unsigned char **modbuildid, 664 char *namebuf); 665 int lookup_module_symbol_name(unsigned long addr, char *symname); 666 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); 667 668 int register_module_notifier(struct notifier_block *nb); 669 int unregister_module_notifier(struct notifier_block *nb); 670 671 extern void print_modules(void); 672 673 static inline bool module_requested_async_probing(struct module *module) 674 { 675 return module && module->async_probe_requested; 676 } 677 678 static inline bool is_livepatch_module(struct module *mod) 679 { 680 #ifdef CONFIG_LIVEPATCH 681 return mod->klp; 682 #else 683 return false; 684 #endif 685 } 686 687 void set_module_sig_enforced(void); 688 689 #else /* !CONFIG_MODULES... */ 690 691 static inline struct module *__module_address(unsigned long addr) 692 { 693 return NULL; 694 } 695 696 static inline struct module *__module_text_address(unsigned long addr) 697 { 698 return NULL; 699 } 700 701 static inline bool is_module_address(unsigned long addr) 702 { 703 return false; 704 } 705 706 static inline bool is_module_percpu_address(unsigned long addr) 707 { 708 return false; 709 } 710 711 static inline bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr) 712 { 713 return false; 714 } 715 716 static inline bool is_module_text_address(unsigned long addr) 717 { 718 return false; 719 } 720 721 static inline bool within_module_core(unsigned long addr, 722 const struct module *mod) 723 { 724 return false; 725 } 726 727 static inline bool within_module_init(unsigned long addr, 728 const struct module *mod) 729 { 730 return false; 731 } 732 733 static inline bool within_module(unsigned long addr, const struct module *mod) 734 { 735 return false; 736 } 737 738 /* Get/put a kernel symbol (calls should be symmetric) */ 739 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak,visibility("hidden"))); &(x); }) 740 #define symbol_put(x) do { } while (0) 741 #define symbol_put_addr(x) do { } while (0) 742 743 static inline void __module_get(struct module *module) 744 { 745 } 746 747 static inline bool try_module_get(struct module *module) 748 { 749 return true; 750 } 751 752 static inline void module_put(struct module *module) 753 { 754 } 755 756 #define module_name(mod) "kernel" 757 758 /* For kallsyms to ask for address resolution. NULL means not found. */ 759 static inline const char *module_address_lookup(unsigned long addr, 760 unsigned long *symbolsize, 761 unsigned long *offset, 762 char **modname, 763 const unsigned char **modbuildid, 764 char *namebuf) 765 { 766 return NULL; 767 } 768 769 static inline int lookup_module_symbol_name(unsigned long addr, char *symname) 770 { 771 return -ERANGE; 772 } 773 774 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) 775 { 776 return -ERANGE; 777 } 778 779 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, 780 char *type, char *name, 781 char *module_name, int *exported) 782 { 783 return -ERANGE; 784 } 785 786 static inline unsigned long module_kallsyms_lookup_name(const char *name) 787 { 788 return 0; 789 } 790 791 static inline int register_module_notifier(struct notifier_block *nb) 792 { 793 /* no events will happen anyway, so this can always succeed */ 794 return 0; 795 } 796 797 static inline int unregister_module_notifier(struct notifier_block *nb) 798 { 799 return 0; 800 } 801 802 #define module_put_and_kthread_exit(code) kthread_exit(code) 803 804 static inline void print_modules(void) 805 { 806 } 807 808 static inline bool module_requested_async_probing(struct module *module) 809 { 810 return false; 811 } 812 813 814 static inline void set_module_sig_enforced(void) 815 { 816 } 817 818 /* Dereference module function descriptor */ 819 static inline 820 void *dereference_module_function_descriptor(struct module *mod, void *ptr) 821 { 822 return ptr; 823 } 824 825 #endif /* CONFIG_MODULES */ 826 827 #ifdef CONFIG_SYSFS 828 extern struct kset *module_kset; 829 extern struct kobj_type module_ktype; 830 #endif /* CONFIG_SYSFS */ 831 832 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) 833 834 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ 835 836 #define __MODULE_STRING(x) __stringify(x) 837 838 #ifdef CONFIG_GENERIC_BUG 839 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, 840 struct module *); 841 void module_bug_cleanup(struct module *); 842 843 #else /* !CONFIG_GENERIC_BUG */ 844 845 static inline void module_bug_finalize(const Elf_Ehdr *hdr, 846 const Elf_Shdr *sechdrs, 847 struct module *mod) 848 { 849 } 850 static inline void module_bug_cleanup(struct module *mod) {} 851 #endif /* CONFIG_GENERIC_BUG */ 852 853 #ifdef CONFIG_RETPOLINE 854 extern bool retpoline_module_ok(bool has_retpoline); 855 #else 856 static inline bool retpoline_module_ok(bool has_retpoline) 857 { 858 return true; 859 } 860 #endif 861 862 #ifdef CONFIG_MODULE_SIG 863 bool is_module_sig_enforced(void); 864 865 static inline bool module_sig_ok(struct module *module) 866 { 867 return module->sig_ok; 868 } 869 #else /* !CONFIG_MODULE_SIG */ 870 static inline bool is_module_sig_enforced(void) 871 { 872 return false; 873 } 874 875 static inline bool module_sig_ok(struct module *module) 876 { 877 return true; 878 } 879 #endif /* CONFIG_MODULE_SIG */ 880 881 #if defined(CONFIG_MODULES) && defined(CONFIG_KALLSYMS) 882 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, 883 struct module *, unsigned long), 884 void *data); 885 #else 886 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, 887 struct module *, unsigned long), 888 void *data) 889 { 890 return -EOPNOTSUPP; 891 } 892 #endif /* CONFIG_MODULES && CONFIG_KALLSYMS */ 893 894 #endif /* _LINUX_MODULE_H */ 895