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 #define security_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) __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) __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 * The following license idents are currently accepted as indicating free 174 * software modules 175 * 176 * "GPL" [GNU Public License v2 or later] 177 * "GPL v2" [GNU Public License v2] 178 * "GPL and additional rights" [GNU Public License v2 rights and more] 179 * "Dual BSD/GPL" [GNU Public License v2 180 * or BSD license choice] 181 * "Dual MIT/GPL" [GNU Public License v2 182 * or MIT license choice] 183 * "Dual MPL/GPL" [GNU Public License v2 184 * or Mozilla license choice] 185 * 186 * The following other idents are available 187 * 188 * "Proprietary" [Non free products] 189 * 190 * There are dual licensed components, but when running with Linux it is the 191 * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL 192 * is a GPL combined work. 193 * 194 * This exists for several reasons 195 * 1. So modinfo can show license info for users wanting to vet their setup 196 * is free 197 * 2. So the community can ignore bug reports including proprietary modules 198 * 3. So vendors can do likewise based on their own policies 199 */ 200 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license) 201 202 /* 203 * Author(s), use "Name <email>" or just "Name", for multiple 204 * authors use multiple MODULE_AUTHOR() statements/lines. 205 */ 206 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) 207 208 /* What your module does. */ 209 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) 210 211 #ifdef MODULE 212 /* Creates an alias so file2alias.c can find device table. */ 213 #define MODULE_DEVICE_TABLE(type, name) \ 214 extern typeof(name) __mod_##type##__##name##_device_table \ 215 __attribute__ ((unused, alias(__stringify(name)))) 216 #else /* !MODULE */ 217 #define MODULE_DEVICE_TABLE(type, name) 218 #endif 219 220 /* Version of form [<epoch>:]<version>[-<extra-version>]. 221 * Or for CVS/RCS ID version, everything but the number is stripped. 222 * <epoch>: A (small) unsigned integer which allows you to start versions 223 * anew. If not mentioned, it's zero. eg. "2:1.0" is after 224 * "1:2.0". 225 226 * <version>: The <version> may contain only alphanumerics and the 227 * character `.'. Ordered by numeric sort for numeric parts, 228 * ascii sort for ascii parts (as per RPM or DEB algorithm). 229 230 * <extraversion>: Like <version>, but inserted for local 231 * customizations, eg "rh3" or "rusty1". 232 233 * Using this automatically adds a checksum of the .c files and the 234 * local headers in "srcversion". 235 */ 236 237 #if defined(MODULE) || !defined(CONFIG_SYSFS) 238 #define MODULE_VERSION(_version) MODULE_INFO(version, _version) 239 #else 240 #define MODULE_VERSION(_version) \ 241 static struct module_version_attribute ___modver_attr = { \ 242 .mattr = { \ 243 .attr = { \ 244 .name = "version", \ 245 .mode = S_IRUGO, \ 246 }, \ 247 .show = __modver_version_show, \ 248 }, \ 249 .module_name = KBUILD_MODNAME, \ 250 .version = _version, \ 251 }; \ 252 static const struct module_version_attribute \ 253 __used __attribute__ ((__section__ ("__modver"))) \ 254 * __moduleparam_const __modver_attr = &___modver_attr 255 #endif 256 257 /* Optional firmware file (or files) needed by the module 258 * format is simply firmware file name. Multiple firmware 259 * files require multiple MODULE_FIRMWARE() specifiers */ 260 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) 261 262 struct notifier_block; 263 264 #ifdef CONFIG_MODULES 265 266 extern int modules_disabled; /* for sysctl */ 267 /* Get/put a kernel symbol (calls must be symmetric) */ 268 void *__symbol_get(const char *symbol); 269 void *__symbol_get_gpl(const char *symbol); 270 #define symbol_get(x) ((typeof(&x))(__symbol_get(__stringify(x)))) 271 272 /* modules using other modules: kdb wants to see this. */ 273 struct module_use { 274 struct list_head source_list; 275 struct list_head target_list; 276 struct module *source, *target; 277 }; 278 279 enum module_state { 280 MODULE_STATE_LIVE, /* Normal state. */ 281 MODULE_STATE_COMING, /* Full formed, running module_init. */ 282 MODULE_STATE_GOING, /* Going away. */ 283 MODULE_STATE_UNFORMED, /* Still setting it up. */ 284 }; 285 286 struct mod_tree_node { 287 struct module *mod; 288 struct latch_tree_node node; 289 }; 290 291 struct module_layout { 292 /* The actual code + data. */ 293 void *base; 294 /* Total size. */ 295 unsigned int size; 296 /* The size of the executable code. */ 297 unsigned int text_size; 298 /* Size of RO section of the module (text+rodata) */ 299 unsigned int ro_size; 300 /* Size of RO after init section */ 301 unsigned int ro_after_init_size; 302 303 #ifdef CONFIG_MODULES_TREE_LOOKUP 304 struct mod_tree_node mtn; 305 #endif 306 }; 307 308 #ifdef CONFIG_MODULES_TREE_LOOKUP 309 /* Only touch one cacheline for common rbtree-for-core-layout case. */ 310 #define __module_layout_align ____cacheline_aligned 311 #else 312 #define __module_layout_align 313 #endif 314 315 struct mod_kallsyms { 316 Elf_Sym *symtab; 317 unsigned int num_symtab; 318 char *strtab; 319 }; 320 321 #ifdef CONFIG_LIVEPATCH 322 struct klp_modinfo { 323 Elf_Ehdr hdr; 324 Elf_Shdr *sechdrs; 325 char *secstrings; 326 unsigned int symndx; 327 }; 328 #endif 329 330 struct module { 331 enum module_state state; 332 333 /* Member of list of modules */ 334 struct list_head list; 335 336 /* Unique handle for this module */ 337 char name[MODULE_NAME_LEN]; 338 339 /* Sysfs stuff. */ 340 struct module_kobject mkobj; 341 struct module_attribute *modinfo_attrs; 342 const char *version; 343 const char *srcversion; 344 struct kobject *holders_dir; 345 346 /* Exported symbols */ 347 const struct kernel_symbol *syms; 348 const s32 *crcs; 349 unsigned int num_syms; 350 351 /* Kernel parameters. */ 352 #ifdef CONFIG_SYSFS 353 struct mutex param_lock; 354 #endif 355 struct kernel_param *kp; 356 unsigned int num_kp; 357 358 /* GPL-only exported symbols. */ 359 unsigned int num_gpl_syms; 360 const struct kernel_symbol *gpl_syms; 361 const s32 *gpl_crcs; 362 363 #ifdef CONFIG_UNUSED_SYMBOLS 364 /* unused exported symbols. */ 365 const struct kernel_symbol *unused_syms; 366 const s32 *unused_crcs; 367 unsigned int num_unused_syms; 368 369 /* GPL-only, unused exported symbols. */ 370 unsigned int num_unused_gpl_syms; 371 const struct kernel_symbol *unused_gpl_syms; 372 const s32 *unused_gpl_crcs; 373 #endif 374 375 #ifdef CONFIG_MODULE_SIG 376 /* Signature was verified. */ 377 bool sig_ok; 378 #endif 379 380 bool async_probe_requested; 381 382 /* symbols that will be GPL-only in the near future. */ 383 const struct kernel_symbol *gpl_future_syms; 384 const s32 *gpl_future_crcs; 385 unsigned int num_gpl_future_syms; 386 387 /* Exception table */ 388 unsigned int num_exentries; 389 struct exception_table_entry *extable; 390 391 /* Startup function. */ 392 int (*init)(void); 393 394 /* Core layout: rbtree is accessed frequently, so keep together. */ 395 struct module_layout core_layout __module_layout_align; 396 struct module_layout init_layout; 397 398 /* Arch-specific module values */ 399 struct mod_arch_specific arch; 400 401 unsigned long taints; /* same bits as kernel:taint_flags */ 402 403 #ifdef CONFIG_GENERIC_BUG 404 /* Support for BUG */ 405 unsigned num_bugs; 406 struct list_head bug_list; 407 struct bug_entry *bug_table; 408 #endif 409 410 #ifdef CONFIG_KALLSYMS 411 /* Protected by RCU and/or module_mutex: use rcu_dereference() */ 412 struct mod_kallsyms *kallsyms; 413 struct mod_kallsyms core_kallsyms; 414 415 /* Section attributes */ 416 struct module_sect_attrs *sect_attrs; 417 418 /* Notes attributes */ 419 struct module_notes_attrs *notes_attrs; 420 #endif 421 422 /* The command line arguments (may be mangled). People like 423 keeping pointers to this stuff */ 424 char *args; 425 426 #ifdef CONFIG_SMP 427 /* Per-cpu data. */ 428 void __percpu *percpu; 429 unsigned int percpu_size; 430 #endif 431 432 #ifdef CONFIG_TRACEPOINTS 433 unsigned int num_tracepoints; 434 tracepoint_ptr_t *tracepoints_ptrs; 435 #endif 436 #ifdef HAVE_JUMP_LABEL 437 struct jump_entry *jump_entries; 438 unsigned int num_jump_entries; 439 #endif 440 #ifdef CONFIG_TRACING 441 unsigned int num_trace_bprintk_fmt; 442 const char **trace_bprintk_fmt_start; 443 #endif 444 #ifdef CONFIG_EVENT_TRACING 445 struct trace_event_call **trace_events; 446 unsigned int num_trace_events; 447 struct trace_eval_map **trace_evals; 448 unsigned int num_trace_evals; 449 #endif 450 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 451 unsigned int num_ftrace_callsites; 452 unsigned long *ftrace_callsites; 453 #endif 454 455 #ifdef CONFIG_LIVEPATCH 456 bool klp; /* Is this a livepatch module? */ 457 bool klp_alive; 458 459 /* Elf information */ 460 struct klp_modinfo *klp_info; 461 #endif 462 463 #ifdef CONFIG_MODULE_UNLOAD 464 /* What modules depend on me? */ 465 struct list_head source_list; 466 /* What modules do I depend on? */ 467 struct list_head target_list; 468 469 /* Destruction function. */ 470 void (*exit)(void); 471 472 atomic_t refcnt; 473 #endif 474 475 #ifdef CONFIG_CONSTRUCTORS 476 /* Constructor functions. */ 477 ctor_fn_t *ctors; 478 unsigned int num_ctors; 479 #endif 480 481 #ifdef CONFIG_FUNCTION_ERROR_INJECTION 482 struct error_injection_entry *ei_funcs; 483 unsigned int num_ei_funcs; 484 #endif 485 } ____cacheline_aligned __randomize_layout; 486 #ifndef MODULE_ARCH_INIT 487 #define MODULE_ARCH_INIT {} 488 #endif 489 490 extern struct mutex module_mutex; 491 492 /* FIXME: It'd be nice to isolate modules during init, too, so they 493 aren't used before they (may) fail. But presently too much code 494 (IDE & SCSI) require entry into the module during init.*/ 495 static inline bool module_is_live(struct module *mod) 496 { 497 return mod->state != MODULE_STATE_GOING; 498 } 499 500 struct module *__module_text_address(unsigned long addr); 501 struct module *__module_address(unsigned long addr); 502 bool is_module_address(unsigned long addr); 503 bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr); 504 bool is_module_percpu_address(unsigned long addr); 505 bool is_module_text_address(unsigned long addr); 506 507 static inline bool within_module_core(unsigned long addr, 508 const struct module *mod) 509 { 510 return (unsigned long)mod->core_layout.base <= addr && 511 addr < (unsigned long)mod->core_layout.base + mod->core_layout.size; 512 } 513 514 static inline bool within_module_init(unsigned long addr, 515 const struct module *mod) 516 { 517 return (unsigned long)mod->init_layout.base <= addr && 518 addr < (unsigned long)mod->init_layout.base + mod->init_layout.size; 519 } 520 521 static inline bool within_module(unsigned long addr, const struct module *mod) 522 { 523 return within_module_init(addr, mod) || within_module_core(addr, mod); 524 } 525 526 /* Search for module by name: must hold module_mutex. */ 527 struct module *find_module(const char *name); 528 529 struct symsearch { 530 const struct kernel_symbol *start, *stop; 531 const s32 *crcs; 532 enum { 533 NOT_GPL_ONLY, 534 GPL_ONLY, 535 WILL_BE_GPL_ONLY, 536 } licence; 537 bool unused; 538 }; 539 540 /* 541 * Search for an exported symbol by name. 542 * 543 * Must be called with module_mutex held or preemption disabled. 544 */ 545 const struct kernel_symbol *find_symbol(const char *name, 546 struct module **owner, 547 const s32 **crc, 548 bool gplok, 549 bool warn); 550 551 /* 552 * Walk the exported symbol table 553 * 554 * Must be called with module_mutex held or preemption disabled. 555 */ 556 bool each_symbol_section(bool (*fn)(const struct symsearch *arr, 557 struct module *owner, 558 void *data), void *data); 559 560 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if 561 symnum out of range. */ 562 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, 563 char *name, char *module_name, int *exported); 564 565 /* Look for this name: can be of form module:name. */ 566 unsigned long module_kallsyms_lookup_name(const char *name); 567 568 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, 569 struct module *, unsigned long), 570 void *data); 571 572 extern void __noreturn __module_put_and_exit(struct module *mod, 573 long code); 574 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code) 575 576 #ifdef CONFIG_MODULE_UNLOAD 577 int module_refcount(struct module *mod); 578 void __symbol_put(const char *symbol); 579 #define symbol_put(x) __symbol_put(__stringify(x)) 580 void symbol_put_addr(void *addr); 581 582 /* Sometimes we know we already have a refcount, and it's easier not 583 to handle the error case (which only happens with rmmod --wait). */ 584 extern void __module_get(struct module *module); 585 586 /* This is the Right Way to get a module: if it fails, it's being removed, 587 * so pretend it's not there. */ 588 extern bool try_module_get(struct module *module); 589 590 extern void module_put(struct module *module); 591 592 #else /*!CONFIG_MODULE_UNLOAD*/ 593 static inline bool try_module_get(struct module *module) 594 { 595 return !module || module_is_live(module); 596 } 597 static inline void module_put(struct module *module) 598 { 599 } 600 static inline void __module_get(struct module *module) 601 { 602 } 603 #define symbol_put(x) do { } while (0) 604 #define symbol_put_addr(p) do { } while (0) 605 606 #endif /* CONFIG_MODULE_UNLOAD */ 607 int ref_module(struct module *a, struct module *b); 608 609 /* This is a #define so the string doesn't get put in every .o file */ 610 #define module_name(mod) \ 611 ({ \ 612 struct module *__mod = (mod); \ 613 __mod ? __mod->name : "kernel"; \ 614 }) 615 616 /* Dereference module function descriptor */ 617 void *dereference_module_function_descriptor(struct module *mod, void *ptr); 618 619 /* For kallsyms to ask for address resolution. namebuf should be at 620 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if 621 * found, otherwise NULL. */ 622 const char *module_address_lookup(unsigned long addr, 623 unsigned long *symbolsize, 624 unsigned long *offset, 625 char **modname, 626 char *namebuf); 627 int lookup_module_symbol_name(unsigned long addr, char *symname); 628 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); 629 630 int register_module_notifier(struct notifier_block *nb); 631 int unregister_module_notifier(struct notifier_block *nb); 632 633 extern void print_modules(void); 634 635 static inline bool module_requested_async_probing(struct module *module) 636 { 637 return module && module->async_probe_requested; 638 } 639 640 #ifdef CONFIG_LIVEPATCH 641 static inline bool is_livepatch_module(struct module *mod) 642 { 643 return mod->klp; 644 } 645 #else /* !CONFIG_LIVEPATCH */ 646 static inline bool is_livepatch_module(struct module *mod) 647 { 648 return false; 649 } 650 #endif /* CONFIG_LIVEPATCH */ 651 652 bool is_module_sig_enforced(void); 653 654 #else /* !CONFIG_MODULES... */ 655 656 static inline struct module *__module_address(unsigned long addr) 657 { 658 return NULL; 659 } 660 661 static inline struct module *__module_text_address(unsigned long addr) 662 { 663 return NULL; 664 } 665 666 static inline bool is_module_address(unsigned long addr) 667 { 668 return false; 669 } 670 671 static inline bool is_module_percpu_address(unsigned long addr) 672 { 673 return false; 674 } 675 676 static inline bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr) 677 { 678 return false; 679 } 680 681 static inline bool is_module_text_address(unsigned long addr) 682 { 683 return false; 684 } 685 686 /* Get/put a kernel symbol (calls should be symmetric) */ 687 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); }) 688 #define symbol_put(x) do { } while (0) 689 #define symbol_put_addr(x) do { } while (0) 690 691 static inline void __module_get(struct module *module) 692 { 693 } 694 695 static inline bool try_module_get(struct module *module) 696 { 697 return true; 698 } 699 700 static inline void module_put(struct module *module) 701 { 702 } 703 704 #define module_name(mod) "kernel" 705 706 /* For kallsyms to ask for address resolution. NULL means not found. */ 707 static inline const char *module_address_lookup(unsigned long addr, 708 unsigned long *symbolsize, 709 unsigned long *offset, 710 char **modname, 711 char *namebuf) 712 { 713 return NULL; 714 } 715 716 static inline int lookup_module_symbol_name(unsigned long addr, char *symname) 717 { 718 return -ERANGE; 719 } 720 721 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) 722 { 723 return -ERANGE; 724 } 725 726 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, 727 char *type, char *name, 728 char *module_name, int *exported) 729 { 730 return -ERANGE; 731 } 732 733 static inline unsigned long module_kallsyms_lookup_name(const char *name) 734 { 735 return 0; 736 } 737 738 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, 739 struct module *, 740 unsigned long), 741 void *data) 742 { 743 return 0; 744 } 745 746 static inline int register_module_notifier(struct notifier_block *nb) 747 { 748 /* no events will happen anyway, so this can always succeed */ 749 return 0; 750 } 751 752 static inline int unregister_module_notifier(struct notifier_block *nb) 753 { 754 return 0; 755 } 756 757 #define module_put_and_exit(code) do_exit(code) 758 759 static inline void print_modules(void) 760 { 761 } 762 763 static inline bool module_requested_async_probing(struct module *module) 764 { 765 return false; 766 } 767 768 static inline bool is_module_sig_enforced(void) 769 { 770 return false; 771 } 772 773 /* Dereference module function descriptor */ 774 static inline 775 void *dereference_module_function_descriptor(struct module *mod, void *ptr) 776 { 777 return ptr; 778 } 779 780 #endif /* CONFIG_MODULES */ 781 782 #ifdef CONFIG_SYSFS 783 extern struct kset *module_kset; 784 extern struct kobj_type module_ktype; 785 extern int module_sysfs_initialized; 786 #endif /* CONFIG_SYSFS */ 787 788 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) 789 790 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ 791 792 #define __MODULE_STRING(x) __stringify(x) 793 794 #ifdef CONFIG_STRICT_MODULE_RWX 795 extern void set_all_modules_text_rw(void); 796 extern void set_all_modules_text_ro(void); 797 extern void module_enable_ro(const struct module *mod, bool after_init); 798 extern void module_disable_ro(const struct module *mod); 799 #else 800 static inline void set_all_modules_text_rw(void) { } 801 static inline void set_all_modules_text_ro(void) { } 802 static inline void module_enable_ro(const struct module *mod, bool after_init) { } 803 static inline void module_disable_ro(const struct module *mod) { } 804 #endif 805 806 #ifdef CONFIG_GENERIC_BUG 807 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, 808 struct module *); 809 void module_bug_cleanup(struct module *); 810 811 #else /* !CONFIG_GENERIC_BUG */ 812 813 static inline void module_bug_finalize(const Elf_Ehdr *hdr, 814 const Elf_Shdr *sechdrs, 815 struct module *mod) 816 { 817 } 818 static inline void module_bug_cleanup(struct module *mod) {} 819 #endif /* CONFIG_GENERIC_BUG */ 820 821 #ifdef RETPOLINE 822 extern bool retpoline_module_ok(bool has_retpoline); 823 #else 824 static inline bool retpoline_module_ok(bool has_retpoline) 825 { 826 return true; 827 } 828 #endif 829 830 #ifdef CONFIG_MODULE_SIG 831 static inline bool module_sig_ok(struct module *module) 832 { 833 return module->sig_ok; 834 } 835 #else /* !CONFIG_MODULE_SIG */ 836 static inline bool module_sig_ok(struct module *module) 837 { 838 return true; 839 } 840 #endif /* CONFIG_MODULE_SIG */ 841 842 #endif /* _LINUX_MODULE_H */ 843