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 23 #include <linux/percpu.h> 24 #include <asm/module.h> 25 26 /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */ 27 #define MODULE_SIG_STRING "~Module signature appended~\n" 28 29 /* Not Yet Implemented */ 30 #define MODULE_SUPPORTED_DEVICE(name) 31 32 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN 33 34 struct modversion_info { 35 unsigned long crc; 36 char name[MODULE_NAME_LEN]; 37 }; 38 39 struct module; 40 41 struct module_kobject { 42 struct kobject kobj; 43 struct module *mod; 44 struct kobject *drivers_dir; 45 struct module_param_attrs *mp; 46 struct completion *kobj_completion; 47 }; 48 49 struct module_attribute { 50 struct attribute attr; 51 ssize_t (*show)(struct module_attribute *, struct module_kobject *, 52 char *); 53 ssize_t (*store)(struct module_attribute *, struct module_kobject *, 54 const char *, size_t count); 55 void (*setup)(struct module *, const char *); 56 int (*test)(struct module *); 57 void (*free)(struct module *); 58 }; 59 60 struct module_version_attribute { 61 struct module_attribute mattr; 62 const char *module_name; 63 const char *version; 64 } __attribute__ ((__aligned__(sizeof(void *)))); 65 66 extern ssize_t __modver_version_show(struct module_attribute *, 67 struct module_kobject *, char *); 68 69 extern struct module_attribute module_uevent; 70 71 /* These are either module local, or the kernel's dummy ones. */ 72 extern int init_module(void); 73 extern void cleanup_module(void); 74 75 #ifndef MODULE 76 /** 77 * module_init() - driver initialization entry point 78 * @x: function to be run at kernel boot time or module insertion 79 * 80 * module_init() will either be called during do_initcalls() (if 81 * builtin) or at module insertion time (if a module). There can only 82 * be one per module. 83 */ 84 #define module_init(x) __initcall(x); 85 86 /** 87 * module_exit() - driver exit entry point 88 * @x: function to be run when driver is removed 89 * 90 * module_exit() will wrap the driver clean-up code 91 * with cleanup_module() when used with rmmod when 92 * the driver is a module. If the driver is statically 93 * compiled into the kernel, module_exit() has no effect. 94 * There can only be one per module. 95 */ 96 #define module_exit(x) __exitcall(x); 97 98 #else /* MODULE */ 99 100 /* 101 * In most cases loadable modules do not need custom 102 * initcall levels. There are still some valid cases where 103 * a driver may be needed early if built in, and does not 104 * matter when built as a loadable module. Like bus 105 * snooping debug drivers. 106 */ 107 #define early_initcall(fn) module_init(fn) 108 #define core_initcall(fn) module_init(fn) 109 #define core_initcall_sync(fn) module_init(fn) 110 #define postcore_initcall(fn) module_init(fn) 111 #define postcore_initcall_sync(fn) module_init(fn) 112 #define arch_initcall(fn) module_init(fn) 113 #define subsys_initcall(fn) module_init(fn) 114 #define subsys_initcall_sync(fn) module_init(fn) 115 #define fs_initcall(fn) module_init(fn) 116 #define fs_initcall_sync(fn) module_init(fn) 117 #define rootfs_initcall(fn) module_init(fn) 118 #define device_initcall(fn) module_init(fn) 119 #define device_initcall_sync(fn) module_init(fn) 120 #define late_initcall(fn) module_init(fn) 121 #define late_initcall_sync(fn) module_init(fn) 122 123 #define console_initcall(fn) module_init(fn) 124 #define security_initcall(fn) module_init(fn) 125 126 /* Each module must use one module_init(). */ 127 #define module_init(initfn) \ 128 static inline initcall_t __inittest(void) \ 129 { return initfn; } \ 130 int init_module(void) __attribute__((alias(#initfn))); 131 132 /* This is only required if you want to be unloadable. */ 133 #define module_exit(exitfn) \ 134 static inline exitcall_t __exittest(void) \ 135 { return exitfn; } \ 136 void cleanup_module(void) __attribute__((alias(#exitfn))); 137 138 #endif 139 140 /* This means "can be init if no module support, otherwise module load 141 may call it." */ 142 #ifdef CONFIG_MODULES 143 #define __init_or_module 144 #define __initdata_or_module 145 #define __initconst_or_module 146 #define __INIT_OR_MODULE .text 147 #define __INITDATA_OR_MODULE .data 148 #define __INITRODATA_OR_MODULE .section ".rodata","a",%progbits 149 #else 150 #define __init_or_module __init 151 #define __initdata_or_module __initdata 152 #define __initconst_or_module __initconst 153 #define __INIT_OR_MODULE __INIT 154 #define __INITDATA_OR_MODULE __INITDATA 155 #define __INITRODATA_OR_MODULE __INITRODATA 156 #endif /*CONFIG_MODULES*/ 157 158 /* Archs provide a method of finding the correct exception table. */ 159 struct exception_table_entry; 160 161 const struct exception_table_entry * 162 search_extable(const struct exception_table_entry *first, 163 const struct exception_table_entry *last, 164 unsigned long value); 165 void sort_extable(struct exception_table_entry *start, 166 struct exception_table_entry *finish); 167 void sort_main_extable(void); 168 void trim_init_extable(struct module *m); 169 170 /* Generic info of form tag = "info" */ 171 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) 172 173 /* For userspace: you can also call me... */ 174 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias) 175 176 /* Soft module dependencies. See man modprobe.d for details. 177 * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz") 178 */ 179 #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep) 180 181 /* 182 * The following license idents are currently accepted as indicating free 183 * software modules 184 * 185 * "GPL" [GNU Public License v2 or later] 186 * "GPL v2" [GNU Public License v2] 187 * "GPL and additional rights" [GNU Public License v2 rights and more] 188 * "Dual BSD/GPL" [GNU Public License v2 189 * or BSD license choice] 190 * "Dual MIT/GPL" [GNU Public License v2 191 * or MIT license choice] 192 * "Dual MPL/GPL" [GNU Public License v2 193 * or Mozilla license choice] 194 * 195 * The following other idents are available 196 * 197 * "Proprietary" [Non free products] 198 * 199 * There are dual licensed components, but when running with Linux it is the 200 * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL 201 * is a GPL combined work. 202 * 203 * This exists for several reasons 204 * 1. So modinfo can show license info for users wanting to vet their setup 205 * is free 206 * 2. So the community can ignore bug reports including proprietary modules 207 * 3. So vendors can do likewise based on their own policies 208 */ 209 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license) 210 211 /* 212 * Author(s), use "Name <email>" or just "Name", for multiple 213 * authors use multiple MODULE_AUTHOR() statements/lines. 214 */ 215 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) 216 217 /* What your module does. */ 218 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) 219 220 #ifdef MODULE 221 /* Creates an alias so file2alias.c can find device table. */ 222 #define MODULE_DEVICE_TABLE(type, name) \ 223 extern const typeof(name) __mod_##type##__##name##_device_table \ 224 __attribute__ ((unused, alias(__stringify(name)))) 225 #else /* !MODULE */ 226 #define MODULE_DEVICE_TABLE(type, name) 227 #endif 228 229 /* Version of form [<epoch>:]<version>[-<extra-version>]. 230 * Or for CVS/RCS ID version, everything but the number is stripped. 231 * <epoch>: A (small) unsigned integer which allows you to start versions 232 * anew. If not mentioned, it's zero. eg. "2:1.0" is after 233 * "1:2.0". 234 235 * <version>: The <version> may contain only alphanumerics and the 236 * character `.'. Ordered by numeric sort for numeric parts, 237 * ascii sort for ascii parts (as per RPM or DEB algorithm). 238 239 * <extraversion>: Like <version>, but inserted for local 240 * customizations, eg "rh3" or "rusty1". 241 242 * Using this automatically adds a checksum of the .c files and the 243 * local headers in "srcversion". 244 */ 245 246 #if defined(MODULE) || !defined(CONFIG_SYSFS) 247 #define MODULE_VERSION(_version) MODULE_INFO(version, _version) 248 #else 249 #define MODULE_VERSION(_version) \ 250 static struct module_version_attribute ___modver_attr = { \ 251 .mattr = { \ 252 .attr = { \ 253 .name = "version", \ 254 .mode = S_IRUGO, \ 255 }, \ 256 .show = __modver_version_show, \ 257 }, \ 258 .module_name = KBUILD_MODNAME, \ 259 .version = _version, \ 260 }; \ 261 static const struct module_version_attribute \ 262 __used __attribute__ ((__section__ ("__modver"))) \ 263 * __moduleparam_const __modver_attr = &___modver_attr 264 #endif 265 266 /* Optional firmware file (or files) needed by the module 267 * format is simply firmware file name. Multiple firmware 268 * files require multiple MODULE_FIRMWARE() specifiers */ 269 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) 270 271 /* Given an address, look for it in the exception tables */ 272 const struct exception_table_entry *search_exception_tables(unsigned long add); 273 274 struct notifier_block; 275 276 #ifdef CONFIG_MODULES 277 278 extern int modules_disabled; /* for sysctl */ 279 /* Get/put a kernel symbol (calls must be symmetric) */ 280 void *__symbol_get(const char *symbol); 281 void *__symbol_get_gpl(const char *symbol); 282 #define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x)))) 283 284 /* modules using other modules: kdb wants to see this. */ 285 struct module_use { 286 struct list_head source_list; 287 struct list_head target_list; 288 struct module *source, *target; 289 }; 290 291 enum module_state { 292 MODULE_STATE_LIVE, /* Normal state. */ 293 MODULE_STATE_COMING, /* Full formed, running module_init. */ 294 MODULE_STATE_GOING, /* Going away. */ 295 MODULE_STATE_UNFORMED, /* Still setting it up. */ 296 }; 297 298 struct module; 299 300 struct mod_tree_node { 301 struct module *mod; 302 struct latch_tree_node node; 303 }; 304 305 struct module_layout { 306 /* The actual code + data. */ 307 void *base; 308 /* Total size. */ 309 unsigned int size; 310 /* The size of the executable code. */ 311 unsigned int text_size; 312 /* Size of RO section of the module (text+rodata) */ 313 unsigned int ro_size; 314 315 #ifdef CONFIG_MODULES_TREE_LOOKUP 316 struct mod_tree_node mtn; 317 #endif 318 }; 319 320 #ifdef CONFIG_MODULES_TREE_LOOKUP 321 /* Only touch one cacheline for common rbtree-for-core-layout case. */ 322 #define __module_layout_align ____cacheline_aligned 323 #else 324 #define __module_layout_align 325 #endif 326 327 struct mod_kallsyms { 328 Elf_Sym *symtab; 329 unsigned int num_symtab; 330 char *strtab; 331 }; 332 333 #ifdef CONFIG_LIVEPATCH 334 struct klp_modinfo { 335 Elf_Ehdr hdr; 336 Elf_Shdr *sechdrs; 337 char *secstrings; 338 unsigned int symndx; 339 }; 340 #endif 341 342 struct module { 343 enum module_state state; 344 345 /* Member of list of modules */ 346 struct list_head list; 347 348 /* Unique handle for this module */ 349 char name[MODULE_NAME_LEN]; 350 351 /* Sysfs stuff. */ 352 struct module_kobject mkobj; 353 struct module_attribute *modinfo_attrs; 354 const char *version; 355 const char *srcversion; 356 struct kobject *holders_dir; 357 358 /* Exported symbols */ 359 const struct kernel_symbol *syms; 360 const unsigned long *crcs; 361 unsigned int num_syms; 362 363 /* Kernel parameters. */ 364 #ifdef CONFIG_SYSFS 365 struct mutex param_lock; 366 #endif 367 struct kernel_param *kp; 368 unsigned int num_kp; 369 370 /* GPL-only exported symbols. */ 371 unsigned int num_gpl_syms; 372 const struct kernel_symbol *gpl_syms; 373 const unsigned long *gpl_crcs; 374 375 #ifdef CONFIG_UNUSED_SYMBOLS 376 /* unused exported symbols. */ 377 const struct kernel_symbol *unused_syms; 378 const unsigned long *unused_crcs; 379 unsigned int num_unused_syms; 380 381 /* GPL-only, unused exported symbols. */ 382 unsigned int num_unused_gpl_syms; 383 const struct kernel_symbol *unused_gpl_syms; 384 const unsigned long *unused_gpl_crcs; 385 #endif 386 387 #ifdef CONFIG_MODULE_SIG 388 /* Signature was verified. */ 389 bool sig_ok; 390 #endif 391 392 bool async_probe_requested; 393 394 /* symbols that will be GPL-only in the near future. */ 395 const struct kernel_symbol *gpl_future_syms; 396 const unsigned long *gpl_future_crcs; 397 unsigned int num_gpl_future_syms; 398 399 /* Exception table */ 400 unsigned int num_exentries; 401 struct exception_table_entry *extable; 402 403 /* Startup function. */ 404 int (*init)(void); 405 406 /* Core layout: rbtree is accessed frequently, so keep together. */ 407 struct module_layout core_layout __module_layout_align; 408 struct module_layout init_layout; 409 410 /* Arch-specific module values */ 411 struct mod_arch_specific arch; 412 413 unsigned int taints; /* same bits as kernel:tainted */ 414 415 #ifdef CONFIG_GENERIC_BUG 416 /* Support for BUG */ 417 unsigned num_bugs; 418 struct list_head bug_list; 419 struct bug_entry *bug_table; 420 #endif 421 422 #ifdef CONFIG_KALLSYMS 423 /* Protected by RCU and/or module_mutex: use rcu_dereference() */ 424 struct mod_kallsyms *kallsyms; 425 struct mod_kallsyms core_kallsyms; 426 427 /* Section attributes */ 428 struct module_sect_attrs *sect_attrs; 429 430 /* Notes attributes */ 431 struct module_notes_attrs *notes_attrs; 432 #endif 433 434 /* The command line arguments (may be mangled). People like 435 keeping pointers to this stuff */ 436 char *args; 437 438 #ifdef CONFIG_SMP 439 /* Per-cpu data. */ 440 void __percpu *percpu; 441 unsigned int percpu_size; 442 #endif 443 444 #ifdef CONFIG_TRACEPOINTS 445 unsigned int num_tracepoints; 446 struct tracepoint * const *tracepoints_ptrs; 447 #endif 448 #ifdef HAVE_JUMP_LABEL 449 struct jump_entry *jump_entries; 450 unsigned int num_jump_entries; 451 #endif 452 #ifdef CONFIG_TRACING 453 unsigned int num_trace_bprintk_fmt; 454 const char **trace_bprintk_fmt_start; 455 #endif 456 #ifdef CONFIG_EVENT_TRACING 457 struct trace_event_call **trace_events; 458 unsigned int num_trace_events; 459 struct trace_enum_map **trace_enums; 460 unsigned int num_trace_enums; 461 #endif 462 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 463 unsigned int num_ftrace_callsites; 464 unsigned long *ftrace_callsites; 465 #endif 466 467 #ifdef CONFIG_LIVEPATCH 468 bool klp; /* Is this a livepatch module? */ 469 bool klp_alive; 470 471 /* Elf information */ 472 struct klp_modinfo *klp_info; 473 #endif 474 475 #ifdef CONFIG_MODULE_UNLOAD 476 /* What modules depend on me? */ 477 struct list_head source_list; 478 /* What modules do I depend on? */ 479 struct list_head target_list; 480 481 /* Destruction function. */ 482 void (*exit)(void); 483 484 atomic_t refcnt; 485 #endif 486 487 #ifdef CONFIG_CONSTRUCTORS 488 /* Constructor functions. */ 489 ctor_fn_t *ctors; 490 unsigned int num_ctors; 491 #endif 492 } ____cacheline_aligned; 493 #ifndef MODULE_ARCH_INIT 494 #define MODULE_ARCH_INIT {} 495 #endif 496 497 extern struct mutex module_mutex; 498 499 /* FIXME: It'd be nice to isolate modules during init, too, so they 500 aren't used before they (may) fail. But presently too much code 501 (IDE & SCSI) require entry into the module during init.*/ 502 static inline int module_is_live(struct module *mod) 503 { 504 return mod->state != MODULE_STATE_GOING; 505 } 506 507 struct module *__module_text_address(unsigned long addr); 508 struct module *__module_address(unsigned long addr); 509 bool is_module_address(unsigned long addr); 510 bool is_module_percpu_address(unsigned long addr); 511 bool is_module_text_address(unsigned long addr); 512 513 static inline bool within_module_core(unsigned long addr, 514 const struct module *mod) 515 { 516 return (unsigned long)mod->core_layout.base <= addr && 517 addr < (unsigned long)mod->core_layout.base + mod->core_layout.size; 518 } 519 520 static inline bool within_module_init(unsigned long addr, 521 const struct module *mod) 522 { 523 return (unsigned long)mod->init_layout.base <= addr && 524 addr < (unsigned long)mod->init_layout.base + mod->init_layout.size; 525 } 526 527 static inline bool within_module(unsigned long addr, const struct module *mod) 528 { 529 return within_module_init(addr, mod) || within_module_core(addr, mod); 530 } 531 532 /* Search for module by name: must hold module_mutex. */ 533 struct module *find_module(const char *name); 534 535 struct symsearch { 536 const struct kernel_symbol *start, *stop; 537 const unsigned long *crcs; 538 enum { 539 NOT_GPL_ONLY, 540 GPL_ONLY, 541 WILL_BE_GPL_ONLY, 542 } licence; 543 bool unused; 544 }; 545 546 /* 547 * Search for an exported symbol by name. 548 * 549 * Must be called with module_mutex held or preemption disabled. 550 */ 551 const struct kernel_symbol *find_symbol(const char *name, 552 struct module **owner, 553 const unsigned long **crc, 554 bool gplok, 555 bool warn); 556 557 /* 558 * Walk the exported symbol table 559 * 560 * Must be called with module_mutex held or preemption disabled. 561 */ 562 bool each_symbol_section(bool (*fn)(const struct symsearch *arr, 563 struct module *owner, 564 void *data), void *data); 565 566 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if 567 symnum out of range. */ 568 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, 569 char *name, char *module_name, int *exported); 570 571 /* Look for this name: can be of form module:name. */ 572 unsigned long module_kallsyms_lookup_name(const char *name); 573 574 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, 575 struct module *, unsigned long), 576 void *data); 577 578 extern void __module_put_and_exit(struct module *mod, long code) 579 __attribute__((noreturn)); 580 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code) 581 582 #ifdef CONFIG_MODULE_UNLOAD 583 int module_refcount(struct module *mod); 584 void __symbol_put(const char *symbol); 585 #define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x)) 586 void symbol_put_addr(void *addr); 587 588 /* Sometimes we know we already have a refcount, and it's easier not 589 to handle the error case (which only happens with rmmod --wait). */ 590 extern void __module_get(struct module *module); 591 592 /* This is the Right Way to get a module: if it fails, it's being removed, 593 * so pretend it's not there. */ 594 extern bool try_module_get(struct module *module); 595 596 extern void module_put(struct module *module); 597 598 #else /*!CONFIG_MODULE_UNLOAD*/ 599 static inline int try_module_get(struct module *module) 600 { 601 return !module || module_is_live(module); 602 } 603 static inline void module_put(struct module *module) 604 { 605 } 606 static inline void __module_get(struct module *module) 607 { 608 } 609 #define symbol_put(x) do { } while (0) 610 #define symbol_put_addr(p) do { } while (0) 611 612 #endif /* CONFIG_MODULE_UNLOAD */ 613 int ref_module(struct module *a, struct module *b); 614 615 /* This is a #define so the string doesn't get put in every .o file */ 616 #define module_name(mod) \ 617 ({ \ 618 struct module *__mod = (mod); \ 619 __mod ? __mod->name : "kernel"; \ 620 }) 621 622 /* For kallsyms to ask for address resolution. namebuf should be at 623 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if 624 * found, otherwise NULL. */ 625 const char *module_address_lookup(unsigned long addr, 626 unsigned long *symbolsize, 627 unsigned long *offset, 628 char **modname, 629 char *namebuf); 630 int lookup_module_symbol_name(unsigned long addr, char *symname); 631 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); 632 633 /* For extable.c to search modules' exception tables. */ 634 const struct exception_table_entry *search_module_extables(unsigned long addr); 635 636 int register_module_notifier(struct notifier_block *nb); 637 int unregister_module_notifier(struct notifier_block *nb); 638 639 extern void print_modules(void); 640 641 static inline bool module_requested_async_probing(struct module *module) 642 { 643 return module && module->async_probe_requested; 644 } 645 646 #ifdef CONFIG_LIVEPATCH 647 static inline bool is_livepatch_module(struct module *mod) 648 { 649 return mod->klp; 650 } 651 #else /* !CONFIG_LIVEPATCH */ 652 static inline bool is_livepatch_module(struct module *mod) 653 { 654 return false; 655 } 656 #endif /* CONFIG_LIVEPATCH */ 657 658 #else /* !CONFIG_MODULES... */ 659 660 /* Given an address, look for it in the exception tables. */ 661 static inline const struct exception_table_entry * 662 search_module_extables(unsigned long addr) 663 { 664 return NULL; 665 } 666 667 static inline struct module *__module_address(unsigned long addr) 668 { 669 return NULL; 670 } 671 672 static inline struct module *__module_text_address(unsigned long addr) 673 { 674 return NULL; 675 } 676 677 static inline bool is_module_address(unsigned long addr) 678 { 679 return false; 680 } 681 682 static inline bool is_module_percpu_address(unsigned long addr) 683 { 684 return false; 685 } 686 687 static inline bool is_module_text_address(unsigned long addr) 688 { 689 return false; 690 } 691 692 /* Get/put a kernel symbol (calls should be symmetric) */ 693 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); }) 694 #define symbol_put(x) do { } while (0) 695 #define symbol_put_addr(x) do { } while (0) 696 697 static inline void __module_get(struct module *module) 698 { 699 } 700 701 static inline int try_module_get(struct module *module) 702 { 703 return 1; 704 } 705 706 static inline void module_put(struct module *module) 707 { 708 } 709 710 #define module_name(mod) "kernel" 711 712 /* For kallsyms to ask for address resolution. NULL means not found. */ 713 static inline const char *module_address_lookup(unsigned long addr, 714 unsigned long *symbolsize, 715 unsigned long *offset, 716 char **modname, 717 char *namebuf) 718 { 719 return NULL; 720 } 721 722 static inline int lookup_module_symbol_name(unsigned long addr, char *symname) 723 { 724 return -ERANGE; 725 } 726 727 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) 728 { 729 return -ERANGE; 730 } 731 732 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, 733 char *type, char *name, 734 char *module_name, int *exported) 735 { 736 return -ERANGE; 737 } 738 739 static inline unsigned long module_kallsyms_lookup_name(const char *name) 740 { 741 return 0; 742 } 743 744 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, 745 struct module *, 746 unsigned long), 747 void *data) 748 { 749 return 0; 750 } 751 752 static inline int register_module_notifier(struct notifier_block *nb) 753 { 754 /* no events will happen anyway, so this can always succeed */ 755 return 0; 756 } 757 758 static inline int unregister_module_notifier(struct notifier_block *nb) 759 { 760 return 0; 761 } 762 763 #define module_put_and_exit(code) do_exit(code) 764 765 static inline void print_modules(void) 766 { 767 } 768 769 static inline bool module_requested_async_probing(struct module *module) 770 { 771 return false; 772 } 773 774 #endif /* CONFIG_MODULES */ 775 776 #ifdef CONFIG_SYSFS 777 extern struct kset *module_kset; 778 extern struct kobj_type module_ktype; 779 extern int module_sysfs_initialized; 780 #endif /* CONFIG_SYSFS */ 781 782 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) 783 784 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ 785 786 #define __MODULE_STRING(x) __stringify(x) 787 788 #ifdef CONFIG_DEBUG_SET_MODULE_RONX 789 extern void set_all_modules_text_rw(void); 790 extern void set_all_modules_text_ro(void); 791 extern void module_enable_ro(const struct module *mod); 792 extern void module_disable_ro(const struct module *mod); 793 #else 794 static inline void set_all_modules_text_rw(void) { } 795 static inline void set_all_modules_text_ro(void) { } 796 static inline void module_enable_ro(const struct module *mod) { } 797 static inline void module_disable_ro(const struct module *mod) { } 798 #endif 799 800 #ifdef CONFIG_GENERIC_BUG 801 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, 802 struct module *); 803 void module_bug_cleanup(struct module *); 804 805 #else /* !CONFIG_GENERIC_BUG */ 806 807 static inline void module_bug_finalize(const Elf_Ehdr *hdr, 808 const Elf_Shdr *sechdrs, 809 struct module *mod) 810 { 811 } 812 static inline void module_bug_cleanup(struct module *mod) {} 813 #endif /* CONFIG_GENERIC_BUG */ 814 815 #ifdef CONFIG_MODULE_SIG 816 static inline bool module_sig_ok(struct module *module) 817 { 818 return module->sig_ok; 819 } 820 #else /* !CONFIG_MODULE_SIG */ 821 static inline bool module_sig_ok(struct module *module) 822 { 823 return true; 824 } 825 #endif /* CONFIG_MODULE_SIG */ 826 827 #endif /* _LINUX_MODULE_H */ 828
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