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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Dynamic loading of modules into the kernel.4 *5 * Rewritten by Richard Henderson <rth@tamu.edu> Dec 19966 * Rewritten again by Rusty Russell, 20027 */8 9#ifndef _LINUX_MODULE_H10#define _LINUX_MODULE_H11 12#include <linux/list.h>13#include <linux/stat.h>14#include <linux/buildid.h>15#include <linux/compiler.h>16#include <linux/cache.h>17#include <linux/kmod.h>18#include <linux/init.h>19#include <linux/elf.h>20#include <linux/stringify.h>21#include <linux/kobject.h>22#include <linux/moduleparam.h>23#include <linux/jump_label.h>24#include <linux/export.h>25#include <linux/rbtree_latch.h>26#include <linux/error-injection.h>27#include <linux/tracepoint-defs.h>28#include <linux/srcu.h>29#include <linux/static_call_types.h>30#include <linux/dynamic_debug.h>31 32#include <linux/percpu.h>33#include <asm/module.h>34 35#define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN36 37struct modversion_info {38 unsigned long crc;39 char name[MODULE_NAME_LEN];40};41 42struct module;43struct exception_table_entry;44 45struct module_kobject {46 struct kobject kobj;47 struct module *mod;48 struct kobject *drivers_dir;49 struct module_param_attrs *mp;50 struct completion *kobj_completion;51} __randomize_layout;52 53struct module_attribute {54 struct attribute attr;55 ssize_t (*show)(struct module_attribute *, struct module_kobject *,56 char *);57 ssize_t (*store)(struct module_attribute *, struct module_kobject *,58 const char *, size_t count);59 void (*setup)(struct module *, const char *);60 int (*test)(struct module *);61 void (*free)(struct module *);62};63 64struct module_version_attribute {65 struct module_attribute mattr;66 const char *module_name;67 const char *version;68};69 70extern ssize_t __modver_version_show(struct module_attribute *,71 struct module_kobject *, char *);72 73extern struct module_attribute module_uevent;74 75/* These are either module local, or the kernel's dummy ones. */76extern int init_module(void);77extern void cleanup_module(void);78 79#ifndef MODULE80/**81 * module_init() - driver initialization entry point82 * @x: function to be run at kernel boot time or module insertion83 *84 * module_init() will either be called during do_initcalls() (if85 * builtin) or at module insertion time (if a module). There can only86 * be one per module.87 */88#define module_init(x) __initcall(x);89 90/**91 * module_exit() - driver exit entry point92 * @x: function to be run when driver is removed93 *94 * module_exit() will wrap the driver clean-up code95 * with cleanup_module() when used with rmmod when96 * the driver is a module. If the driver is statically97 * compiled into the kernel, module_exit() has no effect.98 * There can only be one per module.99 */100#define module_exit(x) __exitcall(x);101 102#else /* MODULE */103 104/*105 * In most cases loadable modules do not need custom106 * initcall levels. There are still some valid cases where107 * a driver may be needed early if built in, and does not108 * matter when built as a loadable module. Like bus109 * snooping debug drivers.110 */111#define early_initcall(fn) module_init(fn)112#define core_initcall(fn) module_init(fn)113#define core_initcall_sync(fn) module_init(fn)114#define postcore_initcall(fn) module_init(fn)115#define postcore_initcall_sync(fn) module_init(fn)116#define arch_initcall(fn) module_init(fn)117#define subsys_initcall(fn) module_init(fn)118#define subsys_initcall_sync(fn) module_init(fn)119#define fs_initcall(fn) module_init(fn)120#define fs_initcall_sync(fn) module_init(fn)121#define rootfs_initcall(fn) module_init(fn)122#define device_initcall(fn) module_init(fn)123#define device_initcall_sync(fn) module_init(fn)124#define late_initcall(fn) module_init(fn)125#define late_initcall_sync(fn) module_init(fn)126 127#define console_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) __copy(initfn) \134 __attribute__((alias(#initfn))); \135 ___ADDRESSABLE(init_module, __initdata);136 137/* This is only required if you want to be unloadable. */138#define module_exit(exitfn) \139 static inline exitcall_t __maybe_unused __exittest(void) \140 { return exitfn; } \141 void cleanup_module(void) __copy(exitfn) \142 __attribute__((alias(#exitfn))); \143 ___ADDRESSABLE(cleanup_module, __exitdata);144 145#endif146 147/* This means "can be init if no module support, otherwise module load148 may call it." */149#ifdef CONFIG_MODULES150#define __init_or_module151#define __initdata_or_module152#define __initconst_or_module153#define __INIT_OR_MODULE .text154#define __INITDATA_OR_MODULE .data155#define __INITRODATA_OR_MODULE .section ".rodata","a",%progbits156#else157#define __init_or_module __init158#define __initdata_or_module __initdata159#define __initconst_or_module __initconst160#define __INIT_OR_MODULE __INIT161#define __INITDATA_OR_MODULE __INITDATA162#define __INITRODATA_OR_MODULE __INITRODATA163#endif /*CONFIG_MODULES*/164 165/* Generic info of form tag = "info" */166#define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)167 168/* For userspace: you can also call me... */169#define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)170 171/* Soft module dependencies. See man modprobe.d for details.172 * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz")173 */174#define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep)175 176/*177 * Weak module dependencies. See man modprobe.d for details.178 * Example: MODULE_WEAKDEP("module-foo")179 */180#define MODULE_WEAKDEP(_weakdep) MODULE_INFO(weakdep, _weakdep)181 182/*183 * MODULE_FILE is used for generating modules.builtin184 * So, make it no-op when this is being built as a module185 */186#ifdef MODULE187#define MODULE_FILE188#else189#define MODULE_FILE MODULE_INFO(file, KBUILD_MODFILE);190#endif191 192/*193 * The following license idents are currently accepted as indicating free194 * software modules195 *196 * "GPL" [GNU Public License v2]197 * "GPL v2" [GNU Public License v2]198 * "GPL and additional rights" [GNU Public License v2 rights and more]199 * "Dual BSD/GPL" [GNU Public License v2200 * or BSD license choice]201 * "Dual MIT/GPL" [GNU Public License v2202 * or MIT license choice]203 * "Dual MPL/GPL" [GNU Public License v2204 * or Mozilla license choice]205 *206 * The following other idents are available207 *208 * "Proprietary" [Non free products]209 *210 * Both "GPL v2" and "GPL" (the latter also in dual licensed strings) are211 * merely stating that the module is licensed under the GPL v2, but are not212 * telling whether "GPL v2 only" or "GPL v2 or later". The reason why there213 * are two variants is a historic and failed attempt to convey more214 * information in the MODULE_LICENSE string. For module loading the215 * "only/or later" distinction is completely irrelevant and does neither216 * replace the proper license identifiers in the corresponding source file217 * nor amends them in any way. The sole purpose is to make the218 * 'Proprietary' flagging work and to refuse to bind symbols which are219 * exported with EXPORT_SYMBOL_GPL when a non free module is loaded.220 *221 * In the same way "BSD" is not a clear license information. It merely222 * states, that the module is licensed under one of the compatible BSD223 * license variants. The detailed and correct license information is again224 * to be found in the corresponding source files.225 *226 * There are dual licensed components, but when running with Linux it is the227 * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL228 * is a GPL combined work.229 *230 * This exists for several reasons231 * 1. So modinfo can show license info for users wanting to vet their setup232 * is free233 * 2. So the community can ignore bug reports including proprietary modules234 * 3. So vendors can do likewise based on their own policies235 */236#define MODULE_LICENSE(_license) MODULE_FILE MODULE_INFO(license, _license)237 238/*239 * Author(s), use "Name <email>" or just "Name", for multiple240 * authors use multiple MODULE_AUTHOR() statements/lines.241 */242#define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)243 244/* What your module does. */245#define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)246 247#ifdef MODULE248/* Creates an alias so file2alias.c can find device table. */249#define MODULE_DEVICE_TABLE(type, name) \250extern typeof(name) __mod_##type##__##name##_device_table \251 __attribute__ ((unused, alias(__stringify(name))))252#else /* !MODULE */253#define MODULE_DEVICE_TABLE(type, name)254#endif255 256/* Version of form [<epoch>:]<version>[-<extra-version>].257 * Or for CVS/RCS ID version, everything but the number is stripped.258 * <epoch>: A (small) unsigned integer which allows you to start versions259 * anew. If not mentioned, it's zero. eg. "2:1.0" is after260 * "1:2.0".261 262 * <version>: The <version> may contain only alphanumerics and the263 * character `.'. Ordered by numeric sort for numeric parts,264 * ascii sort for ascii parts (as per RPM or DEB algorithm).265 266 * <extraversion>: Like <version>, but inserted for local267 * customizations, eg "rh3" or "rusty1".268 269 * Using this automatically adds a checksum of the .c files and the270 * local headers in "srcversion".271 */272 273#if defined(MODULE) || !defined(CONFIG_SYSFS)274#define MODULE_VERSION(_version) MODULE_INFO(version, _version)275#else276#define MODULE_VERSION(_version) \277 MODULE_INFO(version, _version); \278 static struct module_version_attribute __modver_attr \279 __used __section("__modver") \280 __aligned(__alignof__(struct module_version_attribute)) \281 = { \282 .mattr = { \283 .attr = { \284 .name = "version", \285 .mode = S_IRUGO, \286 }, \287 .show = __modver_version_show, \288 }, \289 .module_name = KBUILD_MODNAME, \290 .version = _version, \291 }292#endif293 294/* Optional firmware file (or files) needed by the module295 * format is simply firmware file name. Multiple firmware296 * files require multiple MODULE_FIRMWARE() specifiers */297#define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)298 299#define MODULE_IMPORT_NS(ns) MODULE_INFO(import_ns, __stringify(ns))300 301struct notifier_block;302 303#ifdef CONFIG_MODULES304 305extern int modules_disabled; /* for sysctl */306/* Get/put a kernel symbol (calls must be symmetric) */307void *__symbol_get(const char *symbol);308void *__symbol_get_gpl(const char *symbol);309#define symbol_get(x) ((typeof(&x))(__symbol_get(__stringify(x))))310 311/* modules using other modules: kdb wants to see this. */312struct module_use {313 struct list_head source_list;314 struct list_head target_list;315 struct module *source, *target;316};317 318enum module_state {319 MODULE_STATE_LIVE, /* Normal state. */320 MODULE_STATE_COMING, /* Full formed, running module_init. */321 MODULE_STATE_GOING, /* Going away. */322 MODULE_STATE_UNFORMED, /* Still setting it up. */323};324 325struct mod_tree_node {326 struct module *mod;327 struct latch_tree_node node;328};329 330enum mod_mem_type {331 MOD_TEXT = 0,332 MOD_DATA,333 MOD_RODATA,334 MOD_RO_AFTER_INIT,335 MOD_INIT_TEXT,336 MOD_INIT_DATA,337 MOD_INIT_RODATA,338 339 MOD_MEM_NUM_TYPES,340 MOD_INVALID = -1,341};342 343#define mod_mem_type_is_init(type) \344 ((type) == MOD_INIT_TEXT || \345 (type) == MOD_INIT_DATA || \346 (type) == MOD_INIT_RODATA)347 348#define mod_mem_type_is_core(type) (!mod_mem_type_is_init(type))349 350#define mod_mem_type_is_text(type) \351 ((type) == MOD_TEXT || \352 (type) == MOD_INIT_TEXT)353 354#define mod_mem_type_is_data(type) (!mod_mem_type_is_text(type))355 356#define mod_mem_type_is_core_data(type) \357 (mod_mem_type_is_core(type) && \358 mod_mem_type_is_data(type))359 360#define for_each_mod_mem_type(type) \361 for (enum mod_mem_type (type) = 0; \362 (type) < MOD_MEM_NUM_TYPES; (type)++)363 364#define for_class_mod_mem_type(type, class) \365 for_each_mod_mem_type(type) \366 if (mod_mem_type_is_##class(type))367 368struct module_memory {369 void *base;370 unsigned int size;371 372#ifdef CONFIG_MODULES_TREE_LOOKUP373 struct mod_tree_node mtn;374#endif375};376 377#ifdef CONFIG_MODULES_TREE_LOOKUP378/* Only touch one cacheline for common rbtree-for-core-layout case. */379#define __module_memory_align ____cacheline_aligned380#else381#define __module_memory_align382#endif383 384struct mod_kallsyms {385 Elf_Sym *symtab;386 unsigned int num_symtab;387 char *strtab;388 char *typetab;389};390 391#ifdef CONFIG_LIVEPATCH392/**393 * struct klp_modinfo - ELF information preserved from the livepatch module394 *395 * @hdr: ELF header396 * @sechdrs: Section header table397 * @secstrings: String table for the section headers398 * @symndx: The symbol table section index399 */400struct klp_modinfo {401 Elf_Ehdr hdr;402 Elf_Shdr *sechdrs;403 char *secstrings;404 unsigned int symndx;405};406#endif407 408struct module {409 enum module_state state;410 411 /* Member of list of modules */412 struct list_head list;413 414 /* Unique handle for this module */415 char name[MODULE_NAME_LEN];416 417#ifdef CONFIG_STACKTRACE_BUILD_ID418 /* Module build ID */419 unsigned char build_id[BUILD_ID_SIZE_MAX];420#endif421 422 /* Sysfs stuff. */423 struct module_kobject mkobj;424 struct module_attribute *modinfo_attrs;425 const char *version;426 const char *srcversion;427 struct kobject *holders_dir;428 429 /* Exported symbols */430 const struct kernel_symbol *syms;431 const s32 *crcs;432 unsigned int num_syms;433 434#ifdef CONFIG_ARCH_USES_CFI_TRAPS435 s32 *kcfi_traps;436 s32 *kcfi_traps_end;437#endif438 439 /* Kernel parameters. */440#ifdef CONFIG_SYSFS441 struct mutex param_lock;442#endif443 struct kernel_param *kp;444 unsigned int num_kp;445 446 /* GPL-only exported symbols. */447 unsigned int num_gpl_syms;448 const struct kernel_symbol *gpl_syms;449 const s32 *gpl_crcs;450 bool using_gplonly_symbols;451 452#ifdef CONFIG_MODULE_SIG453 /* Signature was verified. */454 bool sig_ok;455#endif456 457 bool async_probe_requested;458 459 /* Exception table */460 unsigned int num_exentries;461 struct exception_table_entry *extable;462 463 /* Startup function. */464 int (*init)(void);465 466 struct module_memory mem[MOD_MEM_NUM_TYPES] __module_memory_align;467 468 /* Arch-specific module values */469 struct mod_arch_specific arch;470 471 unsigned long taints; /* same bits as kernel:taint_flags */472 473#ifdef CONFIG_GENERIC_BUG474 /* Support for BUG */475 unsigned num_bugs;476 struct list_head bug_list;477 struct bug_entry *bug_table;478#endif479 480#ifdef CONFIG_KALLSYMS481 /* Protected by RCU and/or module_mutex: use rcu_dereference() */482 struct mod_kallsyms __rcu *kallsyms;483 struct mod_kallsyms core_kallsyms;484 485 /* Section attributes */486 struct module_sect_attrs *sect_attrs;487 488 /* Notes attributes */489 struct module_notes_attrs *notes_attrs;490#endif491 492 /* The command line arguments (may be mangled). People like493 keeping pointers to this stuff */494 char *args;495 496#ifdef CONFIG_SMP497 /* Per-cpu data. */498 void __percpu *percpu;499 unsigned int percpu_size;500#endif501 void *noinstr_text_start;502 unsigned int noinstr_text_size;503 504#ifdef CONFIG_TRACEPOINTS505 unsigned int num_tracepoints;506 tracepoint_ptr_t *tracepoints_ptrs;507#endif508#ifdef CONFIG_TREE_SRCU509 unsigned int num_srcu_structs;510 struct srcu_struct **srcu_struct_ptrs;511#endif512#ifdef CONFIG_BPF_EVENTS513 unsigned int num_bpf_raw_events;514 struct bpf_raw_event_map *bpf_raw_events;515#endif516#ifdef CONFIG_DEBUG_INFO_BTF_MODULES517 unsigned int btf_data_size;518 unsigned int btf_base_data_size;519 void *btf_data;520 void *btf_base_data;521#endif522#ifdef CONFIG_JUMP_LABEL523 struct jump_entry *jump_entries;524 unsigned int num_jump_entries;525#endif526#ifdef CONFIG_TRACING527 unsigned int num_trace_bprintk_fmt;528 const char **trace_bprintk_fmt_start;529#endif530#ifdef CONFIG_EVENT_TRACING531 struct trace_event_call **trace_events;532 unsigned int num_trace_events;533 struct trace_eval_map **trace_evals;534 unsigned int num_trace_evals;535#endif536#ifdef CONFIG_FTRACE_MCOUNT_RECORD537 unsigned int num_ftrace_callsites;538 unsigned long *ftrace_callsites;539#endif540#ifdef CONFIG_KPROBES541 void *kprobes_text_start;542 unsigned int kprobes_text_size;543 unsigned long *kprobe_blacklist;544 unsigned int num_kprobe_blacklist;545#endif546#ifdef CONFIG_HAVE_STATIC_CALL_INLINE547 int num_static_call_sites;548 struct static_call_site *static_call_sites;549#endif550#if IS_ENABLED(CONFIG_KUNIT)551 int num_kunit_init_suites;552 struct kunit_suite **kunit_init_suites;553 int num_kunit_suites;554 struct kunit_suite **kunit_suites;555#endif556 557 558#ifdef CONFIG_LIVEPATCH559 bool klp; /* Is this a livepatch module? */560 bool klp_alive;561 562 /* ELF information */563 struct klp_modinfo *klp_info;564#endif565 566#ifdef CONFIG_PRINTK_INDEX567 unsigned int printk_index_size;568 struct pi_entry **printk_index_start;569#endif570 571#ifdef CONFIG_MODULE_UNLOAD572 /* What modules depend on me? */573 struct list_head source_list;574 /* What modules do I depend on? */575 struct list_head target_list;576 577 /* Destruction function. */578 void (*exit)(void);579 580 atomic_t refcnt;581#endif582 583#ifdef CONFIG_CONSTRUCTORS584 /* Constructor functions. */585 ctor_fn_t *ctors;586 unsigned int num_ctors;587#endif588 589#ifdef CONFIG_FUNCTION_ERROR_INJECTION590 struct error_injection_entry *ei_funcs;591 unsigned int num_ei_funcs;592#endif593#ifdef CONFIG_DYNAMIC_DEBUG_CORE594 struct _ddebug_info dyndbg_info;595#endif596} ____cacheline_aligned __randomize_layout;597#ifndef MODULE_ARCH_INIT598#define MODULE_ARCH_INIT {}599#endif600 601#ifndef HAVE_ARCH_KALLSYMS_SYMBOL_VALUE602static inline unsigned long kallsyms_symbol_value(const Elf_Sym *sym)603{604 return sym->st_value;605}606#endif607 608/* FIXME: It'd be nice to isolate modules during init, too, so they609 aren't used before they (may) fail. But presently too much code610 (IDE & SCSI) require entry into the module during init.*/611static inline bool module_is_live(struct module *mod)612{613 return mod->state != MODULE_STATE_GOING;614}615 616static inline bool module_is_coming(struct module *mod)617{618 return mod->state == MODULE_STATE_COMING;619}620 621struct module *__module_text_address(unsigned long addr);622struct module *__module_address(unsigned long addr);623bool is_module_address(unsigned long addr);624bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr);625bool is_module_percpu_address(unsigned long addr);626bool is_module_text_address(unsigned long addr);627 628static inline bool within_module_mem_type(unsigned long addr,629 const struct module *mod,630 enum mod_mem_type type)631{632 unsigned long base, size;633 634 base = (unsigned long)mod->mem[type].base;635 size = mod->mem[type].size;636 return addr - base < size;637}638 639static inline bool within_module_core(unsigned long addr,640 const struct module *mod)641{642 for_class_mod_mem_type(type, core) {643 if (within_module_mem_type(addr, mod, type))644 return true;645 }646 return false;647}648 649static inline bool within_module_init(unsigned long addr,650 const struct module *mod)651{652 for_class_mod_mem_type(type, init) {653 if (within_module_mem_type(addr, mod, type))654 return true;655 }656 return false;657}658 659static inline bool within_module(unsigned long addr, const struct module *mod)660{661 return within_module_init(addr, mod) || within_module_core(addr, mod);662}663 664/* Search for module by name: must be in a RCU-sched critical section. */665struct module *find_module(const char *name);666 667extern void __noreturn __module_put_and_kthread_exit(struct module *mod,668 long code);669#define module_put_and_kthread_exit(code) __module_put_and_kthread_exit(THIS_MODULE, code)670 671#ifdef CONFIG_MODULE_UNLOAD672int module_refcount(struct module *mod);673void __symbol_put(const char *symbol);674#define symbol_put(x) __symbol_put(__stringify(x))675void symbol_put_addr(void *addr);676 677/* Sometimes we know we already have a refcount, and it's easier not678 to handle the error case (which only happens with rmmod --wait). */679extern void __module_get(struct module *module);680 681/**682 * try_module_get() - take module refcount unless module is being removed683 * @module: the module we should check for684 *685 * Only try to get a module reference count if the module is not being removed.686 * This call will fail if the module is in the process of being removed.687 *688 * Care must also be taken to ensure the module exists and is alive prior to689 * usage of this call. This can be gauranteed through two means:690 *691 * 1) Direct protection: you know an earlier caller must have increased the692 * module reference through __module_get(). This can typically be achieved693 * by having another entity other than the module itself increment the694 * module reference count.695 *696 * 2) Implied protection: there is an implied protection against module697 * removal. An example of this is the implied protection used by kernfs /698 * sysfs. The sysfs store / read file operations are guaranteed to exist699 * through the use of kernfs's active reference (see kernfs_active()) and a700 * sysfs / kernfs file removal cannot happen unless the same file is not701 * active. Therefore, if a sysfs file is being read or written to the module702 * which created it must still exist. It is therefore safe to use703 * try_module_get() on module sysfs store / read ops.704 *705 * One of the real values to try_module_get() is the module_is_live() check706 * which ensures that the caller of try_module_get() can yield to userspace707 * module removal requests and gracefully fail if the module is on its way out.708 *709 * Returns true if the reference count was successfully incremented.710 */711extern bool try_module_get(struct module *module);712 713/**714 * module_put() - release a reference count to a module715 * @module: the module we should release a reference count for716 *717 * If you successfully bump a reference count to a module with try_module_get(),718 * when you are finished you must call module_put() to release that reference719 * count.720 */721extern void module_put(struct module *module);722 723#else /*!CONFIG_MODULE_UNLOAD*/724static inline bool try_module_get(struct module *module)725{726 return !module || module_is_live(module);727}728static inline void module_put(struct module *module)729{730}731static inline void __module_get(struct module *module)732{733}734#define symbol_put(x) do { } while (0)735#define symbol_put_addr(p) do { } while (0)736 737#endif /* CONFIG_MODULE_UNLOAD */738 739/* This is a #define so the string doesn't get put in every .o file */740#define module_name(mod) \741({ \742 struct module *__mod = (mod); \743 __mod ? __mod->name : "kernel"; \744})745 746/* Dereference module function descriptor */747void *dereference_module_function_descriptor(struct module *mod, void *ptr);748 749int register_module_notifier(struct notifier_block *nb);750int unregister_module_notifier(struct notifier_block *nb);751 752extern void print_modules(void);753 754static inline bool module_requested_async_probing(struct module *module)755{756 return module && module->async_probe_requested;757}758 759static inline bool is_livepatch_module(struct module *mod)760{761#ifdef CONFIG_LIVEPATCH762 return mod->klp;763#else764 return false;765#endif766}767 768void set_module_sig_enforced(void);769 770#else /* !CONFIG_MODULES... */771 772static inline struct module *__module_address(unsigned long addr)773{774 return NULL;775}776 777static inline struct module *__module_text_address(unsigned long addr)778{779 return NULL;780}781 782static inline bool is_module_address(unsigned long addr)783{784 return false;785}786 787static inline bool is_module_percpu_address(unsigned long addr)788{789 return false;790}791 792static inline bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr)793{794 return false;795}796 797static inline bool is_module_text_address(unsigned long addr)798{799 return false;800}801 802static inline bool within_module_core(unsigned long addr,803 const struct module *mod)804{805 return false;806}807 808static inline bool within_module_init(unsigned long addr,809 const struct module *mod)810{811 return false;812}813 814static inline bool within_module(unsigned long addr, const struct module *mod)815{816 return false;817}818 819/* Get/put a kernel symbol (calls should be symmetric) */820#define symbol_get(x) ({ extern typeof(x) x __attribute__((weak,visibility("hidden"))); &(x); })821#define symbol_put(x) do { } while (0)822#define symbol_put_addr(x) do { } while (0)823 824static inline void __module_get(struct module *module)825{826}827 828static inline bool try_module_get(struct module *module)829{830 return true;831}832 833static inline void module_put(struct module *module)834{835}836 837#define module_name(mod) "kernel"838 839static inline int register_module_notifier(struct notifier_block *nb)840{841 /* no events will happen anyway, so this can always succeed */842 return 0;843}844 845static inline int unregister_module_notifier(struct notifier_block *nb)846{847 return 0;848}849 850#define module_put_and_kthread_exit(code) kthread_exit(code)851 852static inline void print_modules(void)853{854}855 856static inline bool module_requested_async_probing(struct module *module)857{858 return false;859}860 861 862static inline void set_module_sig_enforced(void)863{864}865 866/* Dereference module function descriptor */867static inline868void *dereference_module_function_descriptor(struct module *mod, void *ptr)869{870 return ptr;871}872 873static inline bool module_is_coming(struct module *mod)874{875 return false;876}877#endif /* CONFIG_MODULES */878 879#ifdef CONFIG_SYSFS880extern struct kset *module_kset;881extern const struct kobj_type module_ktype;882#endif /* CONFIG_SYSFS */883 884#define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)885 886/* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */887 888#define __MODULE_STRING(x) __stringify(x)889 890#ifdef CONFIG_GENERIC_BUG891void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,892 struct module *);893void module_bug_cleanup(struct module *);894 895#else /* !CONFIG_GENERIC_BUG */896 897static inline void module_bug_finalize(const Elf_Ehdr *hdr,898 const Elf_Shdr *sechdrs,899 struct module *mod)900{901}902static inline void module_bug_cleanup(struct module *mod) {}903#endif /* CONFIG_GENERIC_BUG */904 905#ifdef CONFIG_MITIGATION_RETPOLINE906extern bool retpoline_module_ok(bool has_retpoline);907#else908static inline bool retpoline_module_ok(bool has_retpoline)909{910 return true;911}912#endif913 914#ifdef CONFIG_MODULE_SIG915bool is_module_sig_enforced(void);916 917static inline bool module_sig_ok(struct module *module)918{919 return module->sig_ok;920}921#else /* !CONFIG_MODULE_SIG */922static inline bool is_module_sig_enforced(void)923{924 return false;925}926 927static inline bool module_sig_ok(struct module *module)928{929 return true;930}931#endif /* CONFIG_MODULE_SIG */932 933#if defined(CONFIG_MODULES) && defined(CONFIG_KALLSYMS)934int module_kallsyms_on_each_symbol(const char *modname,935 int (*fn)(void *, const char *, unsigned long),936 void *data);937 938/* For kallsyms to ask for address resolution. namebuf should be at939 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if940 * found, otherwise NULL.941 */942int module_address_lookup(unsigned long addr,943 unsigned long *symbolsize,944 unsigned long *offset,945 char **modname, const unsigned char **modbuildid,946 char *namebuf);947int lookup_module_symbol_name(unsigned long addr, char *symname);948int lookup_module_symbol_attrs(unsigned long addr,949 unsigned long *size,950 unsigned long *offset,951 char *modname,952 char *name);953 954/* Returns 0 and fills in value, defined and namebuf, or -ERANGE if955 * symnum out of range.956 */957int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,958 char *name, char *module_name, int *exported);959 960/* Look for this name: can be of form module:name. */961unsigned long module_kallsyms_lookup_name(const char *name);962 963unsigned long find_kallsyms_symbol_value(struct module *mod, const char *name);964 965#else /* CONFIG_MODULES && CONFIG_KALLSYMS */966 967static inline int module_kallsyms_on_each_symbol(const char *modname,968 int (*fn)(void *, const char *, unsigned long),969 void *data)970{971 return -EOPNOTSUPP;972}973 974/* For kallsyms to ask for address resolution. NULL means not found. */975static inline int module_address_lookup(unsigned long addr,976 unsigned long *symbolsize,977 unsigned long *offset,978 char **modname,979 const unsigned char **modbuildid,980 char *namebuf)981{982 return 0;983}984 985static inline int lookup_module_symbol_name(unsigned long addr, char *symname)986{987 return -ERANGE;988}989 990static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,991 char *type, char *name,992 char *module_name, int *exported)993{994 return -ERANGE;995}996 997static inline unsigned long module_kallsyms_lookup_name(const char *name)998{999 return 0;1000}1001 1002static inline unsigned long find_kallsyms_symbol_value(struct module *mod,1003 const char *name)1004{1005 return 0;1006}1007 1008#endif /* CONFIG_MODULES && CONFIG_KALLSYMS */1009 1010#endif /* _LINUX_MODULE_H */1011