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 <rth@tamu.edu> 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 24 #include <linux/percpu.h> 25 #include <asm/module.h> 26 27 /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */ 28 #define MODULE_SIG_STRING "~Module signature appended~\n" 29 30 /* Not Yet Implemented */ 31 #define MODULE_SUPPORTED_DEVICE(name) 32 33 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN 34 35 struct modversion_info { 36 unsigned long crc; 37 char name[MODULE_NAME_LEN]; 38 }; 39 40 struct module; 41 struct exception_table_entry; 42 43 struct module_kobject { 44 struct kobject kobj; 45 struct module *mod; 46 struct kobject *drivers_dir; 47 struct module_param_attrs *mp; 48 struct completion *kobj_completion; 49 } __randomize_layout; 50 51 struct module_attribute { 52 struct attribute attr; 53 ssize_t (*show)(struct module_attribute *, struct module_kobject *, 54 char *); 55 ssize_t (*store)(struct module_attribute *, struct module_kobject *, 56 const char *, size_t count); 57 void (*setup)(struct module *, const char *); 58 int (*test)(struct module *); 59 void (*free)(struct module *); 60 }; 61 62 struct module_version_attribute { 63 struct module_attribute mattr; 64 const char *module_name; 65 const char *version; 66 } __attribute__ ((__aligned__(sizeof(void *)))); 67 68 extern ssize_t __modver_version_show(struct module_attribute *, 69 struct module_kobject *, char *); 70 71 extern struct module_attribute module_uevent; 72 73 /* These are either module local, or the kernel's dummy ones. */ 74 extern int init_module(void); 75 extern void cleanup_module(void); 76 77 #ifndef MODULE 78 /** 79 * module_init() - driver initialization entry point 80 * @x: function to be run at kernel boot time or module insertion 81 * 82 * module_init() will either be called during do_initcalls() (if 83 * builtin) or at module insertion time (if a module). There can only 84 * be one per module. 85 */ 86 #define module_init(x) __initcall(x); 87 88 /** 89 * module_exit() - driver exit entry point 90 * @x: function to be run when driver is removed 91 * 92 * module_exit() will wrap the driver clean-up code 93 * with cleanup_module() when used with rmmod when 94 * the driver is a module. If the driver is statically 95 * compiled into the kernel, module_exit() has no effect. 96 * There can only be one per module. 97 */ 98 #define module_exit(x) __exitcall(x); 99 100 #else /* MODULE */ 101 102 /* 103 * In most cases loadable modules do not need custom 104 * initcall levels. There are still some valid cases where 105 * a driver may be needed early if built in, and does not 106 * matter when built as a loadable module. Like bus 107 * snooping debug drivers. 108 */ 109 #define early_initcall(fn) module_init(fn) 110 #define core_initcall(fn) module_init(fn) 111 #define core_initcall_sync(fn) module_init(fn) 112 #define postcore_initcall(fn) module_init(fn) 113 #define postcore_initcall_sync(fn) module_init(fn) 114 #define arch_initcall(fn) module_init(fn) 115 #define subsys_initcall(fn) module_init(fn) 116 #define subsys_initcall_sync(fn) module_init(fn) 117 #define fs_initcall(fn) module_init(fn) 118 #define fs_initcall_sync(fn) module_init(fn) 119 #define rootfs_initcall(fn) module_init(fn) 120 #define device_initcall(fn) module_init(fn) 121 #define device_initcall_sync(fn) module_init(fn) 122 #define late_initcall(fn) module_init(fn) 123 #define late_initcall_sync(fn) module_init(fn) 124 125 #define console_initcall(fn) module_init(fn) 126 #define security_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 struct tracepoint * const *tracepoints_ptrs; 434 #endif 435 #ifdef HAVE_JUMP_LABEL 436 struct jump_entry *jump_entries; 437 unsigned int num_jump_entries; 438 #endif 439 #ifdef CONFIG_TRACING 440 unsigned int num_trace_bprintk_fmt; 441 const char **trace_bprintk_fmt_start; 442 #endif 443 #ifdef CONFIG_EVENT_TRACING 444 struct trace_event_call **trace_events; 445 unsigned int num_trace_events; 446 struct trace_eval_map **trace_evals; 447 unsigned int num_trace_evals; 448 #endif 449 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 450 unsigned int num_ftrace_callsites; 451 unsigned long *ftrace_callsites; 452 #endif 453 454 #ifdef CONFIG_LIVEPATCH 455 bool klp; /* Is this a livepatch module? */ 456 bool klp_alive; 457 458 /* Elf information */ 459 struct klp_modinfo *klp_info; 460 #endif 461 462 #ifdef CONFIG_MODULE_UNLOAD 463 /* What modules depend on me? */ 464 struct list_head source_list; 465 /* What modules do I depend on? */ 466 struct list_head target_list; 467 468 /* Destruction function. */ 469 void (*exit)(void); 470 471 atomic_t refcnt; 472 #endif 473 474 #ifdef CONFIG_CONSTRUCTORS 475 /* Constructor functions. */ 476 ctor_fn_t *ctors; 477 unsigned int num_ctors; 478 #endif 479 480 #ifdef CONFIG_FUNCTION_ERROR_INJECTION 481 struct error_injection_entry *ei_funcs; 482 unsigned int num_ei_funcs; 483 #endif 484 } ____cacheline_aligned __randomize_layout; 485 #ifndef MODULE_ARCH_INIT 486 #define MODULE_ARCH_INIT {} 487 #endif 488 489 extern struct mutex module_mutex; 490 491 /* FIXME: It'd be nice to isolate modules during init, too, so they 492 aren't used before they (may) fail. But presently too much code 493 (IDE & SCSI) require entry into the module during init.*/ 494 static inline bool module_is_live(struct module *mod) 495 { 496 return mod->state != MODULE_STATE_GOING; 497 } 498 499 struct module *__module_text_address(unsigned long addr); 500 struct module *__module_address(unsigned long addr); 501 bool is_module_address(unsigned long addr); 502 bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr); 503 bool is_module_percpu_address(unsigned long addr); 504 bool is_module_text_address(unsigned long addr); 505 506 static inline bool within_module_core(unsigned long addr, 507 const struct module *mod) 508 { 509 return (unsigned long)mod->core_layout.base <= addr && 510 addr < (unsigned long)mod->core_layout.base + mod->core_layout.size; 511 } 512 513 static inline bool within_module_init(unsigned long addr, 514 const struct module *mod) 515 { 516 return (unsigned long)mod->init_layout.base <= addr && 517 addr < (unsigned long)mod->init_layout.base + mod->init_layout.size; 518 } 519 520 static inline bool within_module(unsigned long addr, const struct module *mod) 521 { 522 return within_module_init(addr, mod) || within_module_core(addr, mod); 523 } 524 525 /* Search for module by name: must hold module_mutex. */ 526 struct module *find_module(const char *name); 527 528 struct symsearch { 529 const struct kernel_symbol *start, *stop; 530 const s32 *crcs; 531 enum { 532 NOT_GPL_ONLY, 533 GPL_ONLY, 534 WILL_BE_GPL_ONLY, 535 } licence; 536 bool unused; 537 }; 538 539 /* 540 * Search for an exported symbol by name. 541 * 542 * Must be called with module_mutex held or preemption disabled. 543 */ 544 const struct kernel_symbol *find_symbol(const char *name, 545 struct module **owner, 546 const s32 **crc, 547 bool gplok, 548 bool warn); 549 550 /* 551 * Walk the exported symbol table 552 * 553 * Must be called with module_mutex held or preemption disabled. 554 */ 555 bool each_symbol_section(bool (*fn)(const struct symsearch *arr, 556 struct module *owner, 557 void *data), void *data); 558 559 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if 560 symnum out of range. */ 561 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, 562 char *name, char *module_name, int *exported); 563 564 /* Look for this name: can be of form module:name. */ 565 unsigned long module_kallsyms_lookup_name(const char *name); 566 567 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, 568 struct module *, unsigned long), 569 void *data); 570 571 extern void __noreturn __module_put_and_exit(struct module *mod, 572 long code); 573 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code) 574 575 #ifdef CONFIG_MODULE_UNLOAD 576 int module_refcount(struct module *mod); 577 void __symbol_put(const char *symbol); 578 #define symbol_put(x) __symbol_put(__stringify(x)) 579 void symbol_put_addr(void *addr); 580 581 /* Sometimes we know we already have a refcount, and it's easier not 582 to handle the error case (which only happens with rmmod --wait). */ 583 extern void __module_get(struct module *module); 584 585 /* This is the Right Way to get a module: if it fails, it's being removed, 586 * so pretend it's not there. */ 587 extern bool try_module_get(struct module *module); 588 589 extern void module_put(struct module *module); 590 591 #else /*!CONFIG_MODULE_UNLOAD*/ 592 static inline bool try_module_get(struct module *module) 593 { 594 return !module || module_is_live(module); 595 } 596 static inline void module_put(struct module *module) 597 { 598 } 599 static inline void __module_get(struct module *module) 600 { 601 } 602 #define symbol_put(x) do { } while (0) 603 #define symbol_put_addr(p) do { } while (0) 604 605 #endif /* CONFIG_MODULE_UNLOAD */ 606 int ref_module(struct module *a, struct module *b); 607 608 /* This is a #define so the string doesn't get put in every .o file */ 609 #define module_name(mod) \ 610 ({ \ 611 struct module *__mod = (mod); \ 612 __mod ? __mod->name : "kernel"; \ 613 }) 614 615 /* Dereference module function descriptor */ 616 void *dereference_module_function_descriptor(struct module *mod, void *ptr); 617 618 /* For kallsyms to ask for address resolution. namebuf should be at 619 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if 620 * found, otherwise NULL. */ 621 const char *module_address_lookup(unsigned long addr, 622 unsigned long *symbolsize, 623 unsigned long *offset, 624 char **modname, 625 char *namebuf); 626 int lookup_module_symbol_name(unsigned long addr, char *symname); 627 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); 628 629 int register_module_notifier(struct notifier_block *nb); 630 int unregister_module_notifier(struct notifier_block *nb); 631 632 extern void print_modules(void); 633 634 static inline bool module_requested_async_probing(struct module *module) 635 { 636 return module && module->async_probe_requested; 637 } 638 639 #ifdef CONFIG_LIVEPATCH 640 static inline bool is_livepatch_module(struct module *mod) 641 { 642 return mod->klp; 643 } 644 #else /* !CONFIG_LIVEPATCH */ 645 static inline bool is_livepatch_module(struct module *mod) 646 { 647 return false; 648 } 649 #endif /* CONFIG_LIVEPATCH */ 650 651 bool is_module_sig_enforced(void); 652 653 #else /* !CONFIG_MODULES... */ 654 655 static inline struct module *__module_address(unsigned long addr) 656 { 657 return NULL; 658 } 659 660 static inline struct module *__module_text_address(unsigned long addr) 661 { 662 return NULL; 663 } 664 665 static inline bool is_module_address(unsigned long addr) 666 { 667 return false; 668 } 669 670 static inline bool is_module_percpu_address(unsigned long addr) 671 { 672 return false; 673 } 674 675 static inline bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr) 676 { 677 return false; 678 } 679 680 static inline bool is_module_text_address(unsigned long addr) 681 { 682 return false; 683 } 684 685 /* Get/put a kernel symbol (calls should be symmetric) */ 686 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); }) 687 #define symbol_put(x) do { } while (0) 688 #define symbol_put_addr(x) do { } while (0) 689 690 static inline void __module_get(struct module *module) 691 { 692 } 693 694 static inline bool try_module_get(struct module *module) 695 { 696 return true; 697 } 698 699 static inline void module_put(struct module *module) 700 { 701 } 702 703 #define module_name(mod) "kernel" 704 705 /* For kallsyms to ask for address resolution. NULL means not found. */ 706 static inline const char *module_address_lookup(unsigned long addr, 707 unsigned long *symbolsize, 708 unsigned long *offset, 709 char **modname, 710 char *namebuf) 711 { 712 return NULL; 713 } 714 715 static inline int lookup_module_symbol_name(unsigned long addr, char *symname) 716 { 717 return -ERANGE; 718 } 719 720 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) 721 { 722 return -ERANGE; 723 } 724 725 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, 726 char *type, char *name, 727 char *module_name, int *exported) 728 { 729 return -ERANGE; 730 } 731 732 static inline unsigned long module_kallsyms_lookup_name(const char *name) 733 { 734 return 0; 735 } 736 737 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, 738 struct module *, 739 unsigned long), 740 void *data) 741 { 742 return 0; 743 } 744 745 static inline int register_module_notifier(struct notifier_block *nb) 746 { 747 /* no events will happen anyway, so this can always succeed */ 748 return 0; 749 } 750 751 static inline int unregister_module_notifier(struct notifier_block *nb) 752 { 753 return 0; 754 } 755 756 #define module_put_and_exit(code) do_exit(code) 757 758 static inline void print_modules(void) 759 { 760 } 761 762 static inline bool module_requested_async_probing(struct module *module) 763 { 764 return false; 765 } 766 767 static inline bool is_module_sig_enforced(void) 768 { 769 return false; 770 } 771 772 /* Dereference module function descriptor */ 773 static inline 774 void *dereference_module_function_descriptor(struct module *mod, void *ptr) 775 { 776 return ptr; 777 } 778 779 #endif /* CONFIG_MODULES */ 780 781 #ifdef CONFIG_SYSFS 782 extern struct kset *module_kset; 783 extern struct kobj_type module_ktype; 784 extern int module_sysfs_initialized; 785 #endif /* CONFIG_SYSFS */ 786 787 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) 788 789 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ 790 791 #define __MODULE_STRING(x) __stringify(x) 792 793 #ifdef CONFIG_STRICT_MODULE_RWX 794 extern void set_all_modules_text_rw(void); 795 extern void set_all_modules_text_ro(void); 796 extern void module_enable_ro(const struct module *mod, bool after_init); 797 extern void module_disable_ro(const struct module *mod); 798 #else 799 static inline void set_all_modules_text_rw(void) { } 800 static inline void set_all_modules_text_ro(void) { } 801 static inline void module_enable_ro(const struct module *mod, bool after_init) { } 802 static inline void module_disable_ro(const struct module *mod) { } 803 #endif 804 805 #ifdef CONFIG_GENERIC_BUG 806 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, 807 struct module *); 808 void module_bug_cleanup(struct module *); 809 810 #else /* !CONFIG_GENERIC_BUG */ 811 812 static inline void module_bug_finalize(const Elf_Ehdr *hdr, 813 const Elf_Shdr *sechdrs, 814 struct module *mod) 815 { 816 } 817 static inline void module_bug_cleanup(struct module *mod) {} 818 #endif /* CONFIG_GENERIC_BUG */ 819 820 #ifdef RETPOLINE 821 extern bool retpoline_module_ok(bool has_retpoline); 822 #else 823 static inline bool retpoline_module_ok(bool has_retpoline) 824 { 825 return true; 826 } 827 #endif 828 829 #ifdef CONFIG_MODULE_SIG 830 static inline bool module_sig_ok(struct module *module) 831 { 832 return module->sig_ok; 833 } 834 #else /* !CONFIG_MODULE_SIG */ 835 static inline bool module_sig_ok(struct module *module) 836 { 837 return true; 838 } 839 #endif /* CONFIG_MODULE_SIG */ 840 841 #endif /* _LINUX_MODULE_H */ 842