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/* SPDX-License-Identifier: GPL-2.0-only */ /* * Dynamic loading of modules into the kernel. * * Rewritten by Richard Henderson <rth@tamu.edu> Dec 1996 * Rewritten again by Rusty Russell, 2002 */ #ifndef _LINUX_MODULE_H #define _LINUX_MODULE_H #include <linux/list.h> #include <linux/stat.h> #include <linux/buildid.h> #include <linux/compiler.h> #include <linux/cache.h> #include <linux/kmod.h> #include <linux/init.h> #include <linux/elf.h> #include <linux/stringify.h> #include <linux/kobject.h> #include <linux/moduleparam.h> #include <linux/jump_label.h> #include <linux/export.h> #include <linux/rbtree_latch.h> #include <linux/error-injection.h> #include <linux/tracepoint-defs.h> #include <linux/srcu.h> #include <linux/static_call_types.h> #include <linux/dynamic_debug.h> #include <linux/percpu.h> #include <asm/module.h> #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN struct modversion_info { unsigned long crc; char name[MODULE_NAME_LEN]; }; struct module; struct exception_table_entry; struct module_kobject { struct kobject kobj; struct module *mod; struct kobject *drivers_dir; struct module_param_attrs *mp; struct completion *kobj_completion; } __randomize_layout; struct module_attribute { struct attribute attr; ssize_t (*show)(const struct module_attribute *, struct module_kobject *, char *); ssize_t (*store)(const struct module_attribute *, struct module_kobject *, const char *, size_t count); void (*setup)(struct module *, const char *); int (*test)(struct module *); void (*free)(struct module *); }; struct module_version_attribute { struct module_attribute mattr; const char *module_name; const char *version; }; extern ssize_t __modver_version_show(const struct module_attribute *, struct module_kobject *, char *); extern const struct module_attribute module_uevent; /* These are either module local, or the kernel's dummy ones. */ extern int init_module(void); extern void cleanup_module(void); #ifndef MODULE /** * module_init() - driver initialization entry point * @x: function to be run at kernel boot time or module insertion * * module_init() will either be called during do_initcalls() (if * builtin) or at module insertion time (if a module). There can only * be one per module. */ #define module_init(x) __initcall(x); /** * module_exit() - driver exit entry point * @x: function to be run when driver is removed * * module_exit() will wrap the driver clean-up code * with cleanup_module() when used with rmmod when * the driver is a module. If the driver is statically * compiled into the kernel, module_exit() has no effect. * There can only be one per module. */ #define module_exit(x) __exitcall(x); #else /* MODULE */ /* * In most cases loadable modules do not need custom * initcall levels. There are still some valid cases where * a driver may be needed early if built in, and does not * matter when built as a loadable module. Like bus * snooping debug drivers. */ #define early_initcall(fn) module_init(fn) #define core_initcall(fn) module_init(fn) #define core_initcall_sync(fn) module_init(fn) #define postcore_initcall(fn) module_init(fn) #define postcore_initcall_sync(fn) module_init(fn) #define arch_initcall(fn) module_init(fn) #define subsys_initcall(fn) module_init(fn) #define subsys_initcall_sync(fn) module_init(fn) #define fs_initcall(fn) module_init(fn) #define fs_initcall_sync(fn) module_init(fn) #define rootfs_initcall(fn) module_init(fn) #define device_initcall(fn) module_init(fn) #define device_initcall_sync(fn) module_init(fn) #define late_initcall(fn) module_init(fn) #define late_initcall_sync(fn) module_init(fn) #define console_initcall(fn) module_init(fn) /* Each module must use one module_init(). */ #define module_init(initfn) \ static inline initcall_t __maybe_unused __inittest(void) \ { return initfn; } \ int init_module(void) __copy(initfn) \ __attribute__((alias(#initfn))); \ ___ADDRESSABLE(init_module, __initdata); /* This is only required if you want to be unloadable. */ #define module_exit(exitfn) \ static inline exitcall_t __maybe_unused __exittest(void) \ { return exitfn; } \ void cleanup_module(void) __copy(exitfn) \ __attribute__((alias(#exitfn))); \ ___ADDRESSABLE(cleanup_module, __exitdata); #endif /* This means "can be init if no module support, otherwise module load may call it." */ #ifdef CONFIG_MODULES #define __init_or_module #define __initdata_or_module #define __initconst_or_module #define __INIT_OR_MODULE .text #define __INITDATA_OR_MODULE .data #define __INITRODATA_OR_MODULE .section ".rodata","a",%progbits #else #define __init_or_module __init #define __initdata_or_module __initdata #define __initconst_or_module __initconst #define __INIT_OR_MODULE __INIT #define __INITDATA_OR_MODULE __INITDATA #define __INITRODATA_OR_MODULE __INITRODATA #endif /*CONFIG_MODULES*/ struct module_kobject *lookup_or_create_module_kobject(const char *name); /* Generic info of form tag = "info" */ #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) /* For userspace: you can also call me... */ #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias) /* Soft module dependencies. See man modprobe.d for details. * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz") */ #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep) /* * Weak module dependencies. See man modprobe.d for details. * Example: MODULE_WEAKDEP("module-foo") */ #define MODULE_WEAKDEP(_weakdep) MODULE_INFO(weakdep, _weakdep) /* * MODULE_FILE is used for generating modules.builtin * So, make it no-op when this is being built as a module */ #ifdef MODULE #define MODULE_FILE #else #define MODULE_FILE MODULE_INFO(file, KBUILD_MODFILE); #endif /* * The following license idents are currently accepted as indicating free * software modules * * "GPL" [GNU Public License v2] * "GPL v2" [GNU Public License v2] * "GPL and additional rights" [GNU Public License v2 rights and more] * "Dual BSD/GPL" [GNU Public License v2 * or BSD license choice] * "Dual MIT/GPL" [GNU Public License v2 * or MIT license choice] * "Dual MPL/GPL" [GNU Public License v2 * or Mozilla license choice] * * The following other idents are available * * "Proprietary" [Non free products] * * Both "GPL v2" and "GPL" (the latter also in dual licensed strings) are * merely stating that the module is licensed under the GPL v2, but are not * telling whether "GPL v2 only" or "GPL v2 or later". The reason why there * are two variants is a historic and failed attempt to convey more * information in the MODULE_LICENSE string. For module loading the * "only/or later" distinction is completely irrelevant and does neither * replace the proper license identifiers in the corresponding source file * nor amends them in any way. The sole purpose is to make the * 'Proprietary' flagging work and to refuse to bind symbols which are * exported with EXPORT_SYMBOL_GPL when a non free module is loaded. * * In the same way "BSD" is not a clear license information. It merely * states, that the module is licensed under one of the compatible BSD * license variants. The detailed and correct license information is again * to be found in the corresponding source files. * * There are dual licensed components, but when running with Linux it is the * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL * is a GPL combined work. * * This exists for several reasons * 1. So modinfo can show license info for users wanting to vet their setup * is free * 2. So the community can ignore bug reports including proprietary modules * 3. So vendors can do likewise based on their own policies */ #define MODULE_LICENSE(_license) MODULE_FILE MODULE_INFO(license, _license) /* * Author(s), use "Name <email>" or just "Name", for multiple * authors use multiple MODULE_AUTHOR() statements/lines. */ #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) /* What your module does. */ #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) #ifdef MODULE /* Creates an alias so file2alias.c can find device table. */ #define MODULE_DEVICE_TABLE(type, name) \ extern typeof(name) __mod_device_table__##type##__##name \ __attribute__ ((unused, alias(__stringify(name)))) #else /* !MODULE */ #define MODULE_DEVICE_TABLE(type, name) #endif /* Version of form [<epoch>:]<version>[-<extra-version>]. * Or for CVS/RCS ID version, everything but the number is stripped. * <epoch>: A (small) unsigned integer which allows you to start versions * anew. If not mentioned, it's zero. eg. "2:1.0" is after * "1:2.0". * <version>: The <version> may contain only alphanumerics and the * character `.'. Ordered by numeric sort for numeric parts, * ascii sort for ascii parts (as per RPM or DEB algorithm). * <extraversion>: Like <version>, but inserted for local * customizations, eg "rh3" or "rusty1". * Using this automatically adds a checksum of the .c files and the * local headers in "srcversion". */ #if defined(MODULE) || !defined(CONFIG_SYSFS) #define MODULE_VERSION(_version) MODULE_INFO(version, _version) #else #define MODULE_VERSION(_version) \ MODULE_INFO(version, _version); \ static const struct module_version_attribute __modver_attr \ __used __section("__modver") \ __aligned(__alignof__(struct module_version_attribute)) \ = { \ .mattr = { \ .attr = { \ .name = "version", \ .mode = S_IRUGO, \ }, \ .show = __modver_version_show, \ }, \ .module_name = KBUILD_MODNAME, \ .version = _version, \ } #endif /* Optional firmware file (or files) needed by the module * format is simply firmware file name. Multiple firmware * files require multiple MODULE_FIRMWARE() specifiers */ #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) #define MODULE_IMPORT_NS(ns) MODULE_INFO(import_ns, ns) struct notifier_block; #ifdef CONFIG_MODULES extern int modules_disabled; /* for sysctl */ /* Get/put a kernel symbol (calls must be symmetric) */ void *__symbol_get(const char *symbol); void *__symbol_get_gpl(const char *symbol); #define symbol_get(x) ({ \ static const char __notrim[] \ __used __section(".no_trim_symbol") = __stringify(x); \ (typeof(&x))(__symbol_get(__stringify(x))); }) /* modules using other modules: kdb wants to see this. */ struct module_use { struct list_head source_list; struct list_head target_list; struct module *source, *target; }; enum module_state { MODULE_STATE_LIVE, /* Normal state. */ MODULE_STATE_COMING, /* Full formed, running module_init. */ MODULE_STATE_GOING, /* Going away. */ MODULE_STATE_UNFORMED, /* Still setting it up. */ }; struct mod_tree_node { struct module *mod; struct latch_tree_node node; }; enum mod_mem_type { MOD_TEXT = 0, MOD_DATA, MOD_RODATA, MOD_RO_AFTER_INIT, MOD_INIT_TEXT, MOD_INIT_DATA, MOD_INIT_RODATA, MOD_MEM_NUM_TYPES, MOD_INVALID = -1, }; #define mod_mem_type_is_init(type) \ ((type) == MOD_INIT_TEXT || \ (type) == MOD_INIT_DATA || \ (type) == MOD_INIT_RODATA) #define mod_mem_type_is_core(type) (!mod_mem_type_is_init(type)) #define mod_mem_type_is_text(type) \ ((type) == MOD_TEXT || \ (type) == MOD_INIT_TEXT) #define mod_mem_type_is_data(type) (!mod_mem_type_is_text(type)) #define mod_mem_type_is_core_data(type) \ (mod_mem_type_is_core(type) && \ mod_mem_type_is_data(type)) #define for_each_mod_mem_type(type) \ for (enum mod_mem_type (type) = 0; \ (type) < MOD_MEM_NUM_TYPES; (type)++) #define for_class_mod_mem_type(type, class) \ for_each_mod_mem_type(type) \ if (mod_mem_type_is_##class(type)) struct module_memory { void *base; void *rw_copy; bool is_rox; unsigned int size; #ifdef CONFIG_MODULES_TREE_LOOKUP struct mod_tree_node mtn; #endif }; #ifdef CONFIG_MODULES_TREE_LOOKUP /* Only touch one cacheline for common rbtree-for-core-layout case. */ #define __module_memory_align ____cacheline_aligned #else #define __module_memory_align #endif struct mod_kallsyms { Elf_Sym *symtab; unsigned int num_symtab; char *strtab; char *typetab; }; #ifdef CONFIG_LIVEPATCH /** * struct klp_modinfo - ELF information preserved from the livepatch module * * @hdr: ELF header * @sechdrs: Section header table * @secstrings: String table for the section headers * @symndx: The symbol table section index */ struct klp_modinfo { Elf_Ehdr hdr; Elf_Shdr *sechdrs; char *secstrings; unsigned int symndx; }; #endif struct module { enum module_state state; /* Member of list of modules */ struct list_head list; /* Unique handle for this module */ char name[MODULE_NAME_LEN]; #ifdef CONFIG_STACKTRACE_BUILD_ID /* Module build ID */ unsigned char build_id[BUILD_ID_SIZE_MAX]; #endif /* Sysfs stuff. */ struct module_kobject mkobj; struct module_attribute *modinfo_attrs; const char *version; const char *srcversion; struct kobject *holders_dir; /* Exported symbols */ const struct kernel_symbol *syms; const u32 *crcs; unsigned int num_syms; #ifdef CONFIG_ARCH_USES_CFI_TRAPS s32 *kcfi_traps; s32 *kcfi_traps_end; #endif /* Kernel parameters. */ #ifdef CONFIG_SYSFS struct mutex param_lock; #endif struct kernel_param *kp; unsigned int num_kp; /* GPL-only exported symbols. */ unsigned int num_gpl_syms; const struct kernel_symbol *gpl_syms; const u32 *gpl_crcs; bool using_gplonly_symbols; #ifdef CONFIG_MODULE_SIG /* Signature was verified. */ bool sig_ok; #endif bool async_probe_requested; /* Exception table */ unsigned int num_exentries; struct exception_table_entry *extable; /* Startup function. */ int (*init)(void); struct module_memory mem[MOD_MEM_NUM_TYPES] __module_memory_align; /* Arch-specific module values */ struct mod_arch_specific arch; unsigned long taints; /* same bits as kernel:taint_flags */ #ifdef CONFIG_GENERIC_BUG /* Support for BUG */ unsigned num_bugs; struct list_head bug_list; struct bug_entry *bug_table; #endif #ifdef CONFIG_KALLSYMS /* Protected by RCU and/or module_mutex: use rcu_dereference() */ struct mod_kallsyms __rcu *kallsyms; struct mod_kallsyms core_kallsyms; /* Section attributes */ struct module_sect_attrs *sect_attrs; /* Notes attributes */ struct module_notes_attrs *notes_attrs; #endif /* The command line arguments (may be mangled). People like keeping pointers to this stuff */ char *args; #ifdef CONFIG_SMP /* Per-cpu data. */ void __percpu *percpu; unsigned int percpu_size; #endif void *noinstr_text_start; unsigned int noinstr_text_size; #ifdef CONFIG_TRACEPOINTS unsigned int num_tracepoints; tracepoint_ptr_t *tracepoints_ptrs; #endif #ifdef CONFIG_TREE_SRCU unsigned int num_srcu_structs; struct srcu_struct **srcu_struct_ptrs; #endif #ifdef CONFIG_BPF_EVENTS unsigned int num_bpf_raw_events; struct bpf_raw_event_map *bpf_raw_events; #endif #ifdef CONFIG_DEBUG_INFO_BTF_MODULES unsigned int btf_data_size; unsigned int btf_base_data_size; void *btf_data; void *btf_base_data; #endif #ifdef CONFIG_JUMP_LABEL struct jump_entry *jump_entries; unsigned int num_jump_entries; #endif #ifdef CONFIG_TRACING unsigned int num_trace_bprintk_fmt; const char **trace_bprintk_fmt_start; #endif #ifdef CONFIG_EVENT_TRACING struct trace_event_call **trace_events; unsigned int num_trace_events; struct trace_eval_map **trace_evals; unsigned int num_trace_evals; #endif #ifdef CONFIG_FTRACE_MCOUNT_RECORD unsigned int num_ftrace_callsites; unsigned long *ftrace_callsites; #endif #ifdef CONFIG_KPROBES void *kprobes_text_start; unsigned int kprobes_text_size; unsigned long *kprobe_blacklist; unsigned int num_kprobe_blacklist; #endif #ifdef CONFIG_HAVE_STATIC_CALL_INLINE int num_static_call_sites; struct static_call_site *static_call_sites; #endif #if IS_ENABLED(CONFIG_KUNIT) int num_kunit_init_suites; struct kunit_suite **kunit_init_suites; int num_kunit_suites; struct kunit_suite **kunit_suites; #endif #ifdef CONFIG_LIVEPATCH bool klp; /* Is this a livepatch module? */ bool klp_alive; /* ELF information */ struct klp_modinfo *klp_info; #endif #ifdef CONFIG_PRINTK_INDEX unsigned int printk_index_size; struct pi_entry **printk_index_start; #endif #ifdef CONFIG_MODULE_UNLOAD /* What modules depend on me? */ struct list_head source_list; /* What modules do I depend on? */ struct list_head target_list; /* Destruction function. */ void (*exit)(void); atomic_t refcnt; #endif #ifdef CONFIG_CONSTRUCTORS /* Constructor functions. */ ctor_fn_t *ctors; unsigned int num_ctors; #endif #ifdef CONFIG_FUNCTION_ERROR_INJECTION struct error_injection_entry *ei_funcs; unsigned int num_ei_funcs; #endif #ifdef CONFIG_DYNAMIC_DEBUG_CORE struct _ddebug_info dyndbg_info; #endif } ____cacheline_aligned __randomize_layout; #ifndef MODULE_ARCH_INIT #define MODULE_ARCH_INIT {} #endif #ifndef HAVE_ARCH_KALLSYMS_SYMBOL_VALUE static inline unsigned long kallsyms_symbol_value(const Elf_Sym *sym) { return sym->st_value; } #endif /* FIXME: It'd be nice to isolate modules during init, too, so they aren't used before they (may) fail. But presently too much code (IDE & SCSI) require entry into the module during init.*/ static inline bool module_is_live(struct module *mod) { return mod->state != MODULE_STATE_GOING; } static inline bool module_is_coming(struct module *mod) { return mod->state == MODULE_STATE_COMING; } struct module *__module_text_address(unsigned long addr); struct module *__module_address(unsigned long addr); bool is_module_address(unsigned long addr); bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr); bool is_module_percpu_address(unsigned long addr); bool is_module_text_address(unsigned long addr); static inline bool within_module_mem_type(unsigned long addr, const struct module *mod, enum mod_mem_type type) { unsigned long base, size; base = (unsigned long)mod->mem[type].base; size = mod->mem[type].size; return addr - base < size; } static inline bool within_module_core(unsigned long addr, const struct module *mod) { for_class_mod_mem_type(type, core) { if (within_module_mem_type(addr, mod, type)) return true; } return false; } static inline bool within_module_init(unsigned long addr, const struct module *mod) { for_class_mod_mem_type(type, init) { if (within_module_mem_type(addr, mod, type)) return true; } return false; } static inline bool within_module(unsigned long addr, const struct module *mod) { return within_module_init(addr, mod) || within_module_core(addr, mod); } /* Search for module by name: must be in a RCU-sched critical section. */ struct module *find_module(const char *name); extern void __noreturn __module_put_and_kthread_exit(struct module *mod, long code); #define module_put_and_kthread_exit(code) __module_put_and_kthread_exit(THIS_MODULE, code) #ifdef CONFIG_MODULE_UNLOAD int module_refcount(struct module *mod); void __symbol_put(const char *symbol); #define symbol_put(x) __symbol_put(__stringify(x)) void symbol_put_addr(void *addr); /* Sometimes we know we already have a refcount, and it's easier not to handle the error case (which only happens with rmmod --wait). */ extern void __module_get(struct module *module); /** * try_module_get() - take module refcount unless module is being removed * @module: the module we should check for * * Only try to get a module reference count if the module is not being removed. * This call will fail if the module is in the process of being removed. * * Care must also be taken to ensure the module exists and is alive prior to * usage of this call. This can be gauranteed through two means: * * 1) Direct protection: you know an earlier caller must have increased the * module reference through __module_get(). This can typically be achieved * by having another entity other than the module itself increment the * module reference count. * * 2) Implied protection: there is an implied protection against module * removal. An example of this is the implied protection used by kernfs / * sysfs. The sysfs store / read file operations are guaranteed to exist * through the use of kernfs's active reference (see kernfs_active()) and a * sysfs / kernfs file removal cannot happen unless the same file is not * active. Therefore, if a sysfs file is being read or written to the module * which created it must still exist. It is therefore safe to use * try_module_get() on module sysfs store / read ops. * * One of the real values to try_module_get() is the module_is_live() check * which ensures that the caller of try_module_get() can yield to userspace * module removal requests and gracefully fail if the module is on its way out. * * Returns true if the reference count was successfully incremented. */ extern bool try_module_get(struct module *module); /** * module_put() - release a reference count to a module * @module: the module we should release a reference count for * * If you successfully bump a reference count to a module with try_module_get(), * when you are finished you must call module_put() to release that reference * count. */ extern void module_put(struct module *module); #else /*!CONFIG_MODULE_UNLOAD*/ static inline bool try_module_get(struct module *module) { return !module || module_is_live(module); } static inline void module_put(struct module *module) { } static inline void __module_get(struct module *module) { } #define symbol_put(x) do { } while (0) #define symbol_put_addr(p) do { } while (0) #endif /* CONFIG_MODULE_UNLOAD */ /* This is a #define so the string doesn't get put in every .o file */ #define module_name(mod) \ ({ \ struct module *__mod = (mod); \ __mod ? __mod->name : "kernel"; \ }) /* Dereference module function descriptor */ void *dereference_module_function_descriptor(struct module *mod, void *ptr); int register_module_notifier(struct notifier_block *nb); int unregister_module_notifier(struct notifier_block *nb); extern void print_modules(void); static inline bool module_requested_async_probing(struct module *module) { return module && module->async_probe_requested; } static inline bool is_livepatch_module(struct module *mod) { #ifdef CONFIG_LIVEPATCH return mod->klp; #else return false; #endif } void set_module_sig_enforced(void); void *__module_writable_address(struct module *mod, void *loc); static inline void *module_writable_address(struct module *mod, void *loc) { if (!IS_ENABLED(CONFIG_ARCH_HAS_EXECMEM_ROX) || !mod || mod->state != MODULE_STATE_UNFORMED) return loc; return __module_writable_address(mod, loc); } #else /* !CONFIG_MODULES... */ static inline struct module *__module_address(unsigned long addr) { return NULL; } static inline struct module *__module_text_address(unsigned long addr) { return NULL; } static inline bool is_module_address(unsigned long addr) { return false; } static inline bool is_module_percpu_address(unsigned long addr) { return false; } static inline bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr) { return false; } static inline bool is_module_text_address(unsigned long addr) { return false; } static inline bool within_module_core(unsigned long addr, const struct module *mod) { return false; } static inline bool within_module_init(unsigned long addr, const struct module *mod) { return false; } static inline bool within_module(unsigned long addr, const struct module *mod) { return false; } /* Get/put a kernel symbol (calls should be symmetric) */ #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak,visibility("hidden"))); &(x); }) #define symbol_put(x) do { } while (0) #define symbol_put_addr(x) do { } while (0) static inline void __module_get(struct module *module) { } static inline bool try_module_get(struct module *module) { return true; } static inline void module_put(struct module *module) { } #define module_name(mod) "kernel" static inline int register_module_notifier(struct notifier_block *nb) { /* no events will happen anyway, so this can always succeed */ return 0; } static inline int unregister_module_notifier(struct notifier_block *nb) { return 0; } #define module_put_and_kthread_exit(code) kthread_exit(code) static inline void print_modules(void) { } static inline bool module_requested_async_probing(struct module *module) { return false; } static inline void set_module_sig_enforced(void) { } /* Dereference module function descriptor */ static inline void *dereference_module_function_descriptor(struct module *mod, void *ptr) { return ptr; } static inline bool module_is_coming(struct module *mod) { return false; } static inline void *module_writable_address(struct module *mod, void *loc) { return loc; } #endif /* CONFIG_MODULES */ #ifdef CONFIG_SYSFS extern struct kset *module_kset; extern const struct kobj_type module_ktype; #endif /* CONFIG_SYSFS */ #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ #define __MODULE_STRING(x) __stringify(x) #ifdef CONFIG_GENERIC_BUG void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, struct module *); void module_bug_cleanup(struct module *); #else /* !CONFIG_GENERIC_BUG */ static inline void module_bug_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *mod) { } static inline void module_bug_cleanup(struct module *mod) {} #endif /* CONFIG_GENERIC_BUG */ #ifdef CONFIG_MITIGATION_RETPOLINE extern bool retpoline_module_ok(bool has_retpoline); #else static inline bool retpoline_module_ok(bool has_retpoline) { return true; } #endif #ifdef CONFIG_MODULE_SIG bool is_module_sig_enforced(void); static inline bool module_sig_ok(struct module *module) { return module->sig_ok; } #else /* !CONFIG_MODULE_SIG */ static inline bool is_module_sig_enforced(void) { return false; } static inline bool module_sig_ok(struct module *module) { return true; } #endif /* CONFIG_MODULE_SIG */ #if defined(CONFIG_MODULES) && defined(CONFIG_KALLSYMS) int module_kallsyms_on_each_symbol(const char *modname, int (*fn)(void *, const char *, unsigned long), void *data); /* For kallsyms to ask for address resolution. namebuf should be at * least KSYM_NAME_LEN long: a pointer to namebuf is returned if * found, otherwise NULL. */ int module_address_lookup(unsigned long addr, unsigned long *symbolsize, unsigned long *offset, char **modname, const unsigned char **modbuildid, char *namebuf); int lookup_module_symbol_name(unsigned long addr, char *symname); int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if * symnum out of range. */ int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, char *name, char *module_name, int *exported); /* Look for this name: can be of form module:name. */ unsigned long module_kallsyms_lookup_name(const char *name); unsigned long find_kallsyms_symbol_value(struct module *mod, const char *name); #else /* CONFIG_MODULES && CONFIG_KALLSYMS */ static inline int module_kallsyms_on_each_symbol(const char *modname, int (*fn)(void *, const char *, unsigned long), void *data) { return -EOPNOTSUPP; } /* For kallsyms to ask for address resolution. NULL means not found. */ static inline int module_address_lookup(unsigned long addr, unsigned long *symbolsize, unsigned long *offset, char **modname, const unsigned char **modbuildid, char *namebuf) { return 0; } static inline int lookup_module_symbol_name(unsigned long addr, char *symname) { return -ERANGE; } static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, char *name, char *module_name, int *exported) { return -ERANGE; } static inline unsigned long module_kallsyms_lookup_name(const char *name) { return 0; } static inline unsigned long find_kallsyms_symbol_value(struct module *mod, const char *name) { return 0; } #endif /* CONFIG_MODULES && CONFIG_KALLSYMS */ #endif /* _LINUX_MODULE_H */