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 <[email protected]> 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) __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) __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 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