| #ifndef _LINUX_MODULE_H |
| #define _LINUX_MODULE_H |
| /* |
| * Dynamic loading of modules into the kernel. |
| * |
| * Rewritten by Richard Henderson <rth@tamu.edu> Dec 1996 |
| * Rewritten again by Rusty Russell, 2002 |
| */ |
| #include <linux/list.h> |
| #include <linux/stat.h> |
| #include <linux/compiler.h> |
| #include <linux/cache.h> |
| #include <linux/kmod.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/percpu.h> |
| #include <asm/module.h> |
| |
| /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */ |
| #define MODULE_SIG_STRING "~Module signature appended~\n" |
| |
| /* Not Yet Implemented */ |
| #define MODULE_SUPPORTED_DEVICE(name) |
| |
| #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN |
| |
| struct modversion_info { |
| unsigned long crc; |
| char name[MODULE_NAME_LEN]; |
| }; |
| |
| struct module; |
| |
| struct module_kobject { |
| struct kobject kobj; |
| struct module *mod; |
| struct kobject *drivers_dir; |
| struct module_param_attrs *mp; |
| struct completion *kobj_completion; |
| }; |
| |
| struct module_attribute { |
| struct attribute attr; |
| ssize_t (*show)(struct module_attribute *, struct module_kobject *, |
| char *); |
| ssize_t (*store)(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; |
| } __attribute__ ((__aligned__(sizeof(void *)))); |
| |
| extern ssize_t __modver_version_show(struct module_attribute *, |
| struct module_kobject *, char *); |
| |
| extern 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); |
| |
| /* Archs provide a method of finding the correct exception table. */ |
| struct exception_table_entry; |
| |
| const struct exception_table_entry * |
| search_extable(const struct exception_table_entry *first, |
| const struct exception_table_entry *last, |
| unsigned long value); |
| void sort_extable(struct exception_table_entry *start, |
| struct exception_table_entry *finish); |
| void sort_main_extable(void); |
| void trim_init_extable(struct module *m); |
| |
| /* 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) |
| |
| /* |
| * The following license idents are currently accepted as indicating free |
| * software modules |
| * |
| * "GPL" [GNU Public License v2 or later] |
| * "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] |
| * |
| * 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_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 const struct type##_device_id __mod_##type##__##name##_device_table \ |
| __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) \ |
| static struct module_version_attribute ___modver_attr = { \ |
| .mattr = { \ |
| .attr = { \ |
| .name = "version", \ |
| .mode = S_IRUGO, \ |
| }, \ |
| .show = __modver_version_show, \ |
| }, \ |
| .module_name = KBUILD_MODNAME, \ |
| .version = _version, \ |
| }; \ |
| static const struct module_version_attribute \ |
| __used __attribute__ ((__section__ ("__modver"))) \ |
| * __moduleparam_const __modver_attr = &___modver_attr |
| #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) |
| |
| /* Given an address, look for it in the exception tables */ |
| const struct exception_table_entry *search_exception_tables(unsigned long add); |
| |
| 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) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(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 module { |
| enum module_state state; |
| |
| /* Member of list of modules */ |
| struct list_head list; |
| |
| /* Unique handle for this module */ |
| char name[MODULE_NAME_LEN]; |
| |
| /* 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 unsigned long *crcs; |
| unsigned int num_syms; |
| |
| /* Kernel parameters. */ |
| struct kernel_param *kp; |
| unsigned int num_kp; |
| |
| /* GPL-only exported symbols. */ |
| unsigned int num_gpl_syms; |
| const struct kernel_symbol *gpl_syms; |
| const unsigned long *gpl_crcs; |
| |
| #ifdef CONFIG_UNUSED_SYMBOLS |
| /* unused exported symbols. */ |
| const struct kernel_symbol *unused_syms; |
| const unsigned long *unused_crcs; |
| unsigned int num_unused_syms; |
| |
| /* GPL-only, unused exported symbols. */ |
| unsigned int num_unused_gpl_syms; |
| const struct kernel_symbol *unused_gpl_syms; |
| const unsigned long *unused_gpl_crcs; |
| #endif |
| |
| #ifdef CONFIG_MODULE_SIG |
| /* Signature was verified. */ |
| bool sig_ok; |
| #endif |
| |
| /* symbols that will be GPL-only in the near future. */ |
| const struct kernel_symbol *gpl_future_syms; |
| const unsigned long *gpl_future_crcs; |
| unsigned int num_gpl_future_syms; |
| |
| /* Exception table */ |
| unsigned int num_exentries; |
| struct exception_table_entry *extable; |
| |
| /* Startup function. */ |
| int (*init)(void); |
| |
| /* If this is non-NULL, vfree after init() returns */ |
| void *module_init; |
| |
| /* Here is the actual code + data, vfree'd on unload. */ |
| void *module_core; |
| |
| /* Here are the sizes of the init and core sections */ |
| unsigned int init_size, core_size; |
| |
| /* The size of the executable code in each section. */ |
| unsigned int init_text_size, core_text_size; |
| |
| /* Size of RO sections of the module (text+rodata) */ |
| unsigned int init_ro_size, core_ro_size; |
| |
| /* Arch-specific module values */ |
| struct mod_arch_specific arch; |
| |
| unsigned int taints; /* same bits as kernel:tainted */ |
| |
| #ifdef CONFIG_GENERIC_BUG |
| /* Support for BUG */ |
| unsigned num_bugs; |
| struct list_head bug_list; |
| struct bug_entry *bug_table; |
| #endif |
| |
| #ifdef CONFIG_KALLSYMS |
| /* |
| * We keep the symbol and string tables for kallsyms. |
| * The core_* fields below are temporary, loader-only (they |
| * could really be discarded after module init). |
| */ |
| Elf_Sym *symtab, *core_symtab; |
| unsigned int num_symtab, core_num_syms; |
| char *strtab, *core_strtab; |
| |
| /* 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 |
| |
| #ifdef CONFIG_TRACEPOINTS |
| unsigned int num_tracepoints; |
| struct tracepoint * const *tracepoints_ptrs; |
| #endif |
| #ifdef HAVE_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 ftrace_event_call **trace_events; |
| unsigned int num_trace_events; |
| #endif |
| #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
| unsigned int num_ftrace_callsites; |
| unsigned long *ftrace_callsites; |
| #endif |
| |
| #ifdef CONFIG_LIVEPATCH |
| bool klp_alive; |
| #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 |
| }; |
| #ifndef MODULE_ARCH_INIT |
| #define MODULE_ARCH_INIT {} |
| #endif |
| |
| extern struct mutex module_mutex; |
| |
| /* 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 int module_is_live(struct module *mod) |
| { |
| return mod->state != MODULE_STATE_GOING; |
| } |
| |
| 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); |
| bool is_module_text_address(unsigned long addr); |
| |
| static inline bool within_module_core(unsigned long addr, |
| const struct module *mod) |
| { |
| return (unsigned long)mod->module_core <= addr && |
| addr < (unsigned long)mod->module_core + mod->core_size; |
| } |
| |
| static inline bool within_module_init(unsigned long addr, |
| const struct module *mod) |
| { |
| return (unsigned long)mod->module_init <= addr && |
| addr < (unsigned long)mod->module_init + mod->init_size; |
| } |
| |
| 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 hold module_mutex. */ |
| struct module *find_module(const char *name); |
| |
| struct symsearch { |
| const struct kernel_symbol *start, *stop; |
| const unsigned long *crcs; |
| enum { |
| NOT_GPL_ONLY, |
| GPL_ONLY, |
| WILL_BE_GPL_ONLY, |
| } licence; |
| bool unused; |
| }; |
| |
| /* Search for an exported symbol by name. */ |
| const struct kernel_symbol *find_symbol(const char *name, |
| struct module **owner, |
| const unsigned long **crc, |
| bool gplok, |
| bool warn); |
| |
| /* Walk the exported symbol table */ |
| bool each_symbol_section(bool (*fn)(const struct symsearch *arr, |
| struct module *owner, |
| void *data), void *data); |
| |
| /* 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); |
| |
| int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
| struct module *, unsigned long), |
| void *data); |
| |
| extern void __module_put_and_exit(struct module *mod, long code) |
| __attribute__((noreturn)); |
| #define module_put_and_exit(code) __module_put_and_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(VMLINUX_SYMBOL_STR(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); |
| |
| /* This is the Right Way to get a module: if it fails, it's being removed, |
| * so pretend it's not there. */ |
| extern bool try_module_get(struct module *module); |
| |
| extern void module_put(struct module *module); |
| |
| #else /*!CONFIG_MODULE_UNLOAD*/ |
| static inline int 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 */ |
| int ref_module(struct module *a, struct module *b); |
| |
| /* 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"; \ |
| }) |
| |
| /* 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. */ |
| const char *module_address_lookup(unsigned long addr, |
| unsigned long *symbolsize, |
| unsigned long *offset, |
| char **modname, |
| 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); |
| |
| /* For extable.c to search modules' exception tables. */ |
| const struct exception_table_entry *search_module_extables(unsigned long addr); |
| |
| int register_module_notifier(struct notifier_block *nb); |
| int unregister_module_notifier(struct notifier_block *nb); |
| |
| extern void print_modules(void); |
| |
| #else /* !CONFIG_MODULES... */ |
| |
| /* Given an address, look for it in the exception tables. */ |
| static inline const struct exception_table_entry * |
| search_module_extables(unsigned long addr) |
| { |
| return NULL; |
| } |
| |
| 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_text_address(unsigned long addr) |
| { |
| return false; |
| } |
| |
| /* Get/put a kernel symbol (calls should be symmetric) */ |
| #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(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 int try_module_get(struct module *module) |
| { |
| return 1; |
| } |
| |
| static inline void module_put(struct module *module) |
| { |
| } |
| |
| #define module_name(mod) "kernel" |
| |
| /* For kallsyms to ask for address resolution. NULL means not found. */ |
| static inline const char *module_address_lookup(unsigned long addr, |
| unsigned long *symbolsize, |
| unsigned long *offset, |
| char **modname, |
| char *namebuf) |
| { |
| return NULL; |
| } |
| |
| static inline int lookup_module_symbol_name(unsigned long addr, char *symname) |
| { |
| return -ERANGE; |
| } |
| |
| static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) |
| { |
| 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 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, |
| struct module *, |
| unsigned long), |
| void *data) |
| { |
| return 0; |
| } |
| |
| 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_exit(code) do_exit(code) |
| |
| static inline void print_modules(void) |
| { |
| } |
| #endif /* CONFIG_MODULES */ |
| |
| #ifdef CONFIG_SYSFS |
| extern struct kset *module_kset; |
| extern struct kobj_type module_ktype; |
| extern int module_sysfs_initialized; |
| #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_DEBUG_SET_MODULE_RONX |
| extern void set_all_modules_text_rw(void); |
| extern void set_all_modules_text_ro(void); |
| #else |
| static inline void set_all_modules_text_rw(void) { } |
| static inline void set_all_modules_text_ro(void) { } |
| #endif |
| |
| #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 */ |
| |
| #endif /* _LINUX_MODULE_H */ |