diff options
Diffstat (limited to 'include/linux/module.h')
| -rw-r--r-- | include/linux/module.h | 649 |
1 files changed, 432 insertions, 217 deletions
diff --git a/include/linux/module.h b/include/linux/module.h index e7bdd549e527..d80c3ea57472 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -1,15 +1,20 @@ -#ifndef _LINUX_MODULE_H -#define _LINUX_MODULE_H +/* 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/cleanup.h> #include <linux/kmod.h> #include <linux/init.h> #include <linux/elf.h> @@ -19,17 +24,16 @@ #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> -/* 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 +#define MODULE_NAME_LEN __MODULE_NAME_LEN struct modversion_info { unsigned long crc; @@ -49,9 +53,9 @@ struct module_kobject { struct module_attribute { struct attribute attr; - ssize_t (*show)(struct module_attribute *, struct module_kobject *, + ssize_t (*show)(const struct module_attribute *, struct module_kobject *, char *); - ssize_t (*store)(struct module_attribute *, struct module_kobject *, + 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 *); @@ -62,12 +66,12 @@ 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 *, +extern ssize_t __modver_version_show(const struct module_attribute *, struct module_kobject *, char *); -extern struct module_attribute module_uevent; +extern const struct module_attribute module_uevent; /* These are either module local, or the kernel's dummy ones. */ extern int init_module(void); @@ -122,19 +126,22 @@ extern void cleanup_module(void); #define late_initcall_sync(fn) module_init(fn) #define console_initcall(fn) module_init(fn) -#define security_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) __attribute__((alias(#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) __attribute__((alias(#exitfn))); + void cleanup_module(void) __copy(exitfn) \ + __attribute__((alias(#exitfn))); \ + ___ADDRESSABLE(cleanup_module, __exitdata); #endif @@ -156,8 +163,7 @@ extern void cleanup_module(void); #define __INITRODATA_OR_MODULE __INITRODATA #endif /*CONFIG_MODULES*/ -/* Generic info of form tag = "info" */ -#define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) +struct module_kobject *lookup_or_create_module_kobject(const char *name); /* For userspace: you can also call me... */ #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias) @@ -168,10 +174,26 @@ extern void cleanup_module(void); #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 or later] + * "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 @@ -185,6 +207,22 @@ extern void cleanup_module(void); * * "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. @@ -195,7 +233,7 @@ extern void cleanup_module(void); * 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) +#define MODULE_LICENSE(_license) MODULE_FILE MODULE_INFO(license, _license) /* * Author(s), use "Name <email>" or just "Name", for multiple @@ -206,14 +244,23 @@ extern void cleanup_module(void); /* What your module does. */ #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) -#ifdef MODULE +/* + * Format: __mod_device_table__kmod_<modname>__<type>__<name> + * Parts of the string `__kmod_` and `__` are used as delimiters when parsing + * a symbol in file2alias.c + */ +#define __mod_device_table(type, name) \ + __PASTE(__mod_device_table__, \ + __PASTE(kmod_, \ + __PASTE(__KBUILD_MODNAME, \ + __PASTE(__, \ + __PASTE(type, \ + __PASTE(__, name)))))) + /* Creates an alias so file2alias.c can find device table. */ #define MODULE_DEVICE_TABLE(type, name) \ -extern const typeof(name) __mod_##type##__##name##_device_table \ - __attribute__ ((unused, alias(__stringify(name)))) -#else /* !MODULE */ -#define MODULE_DEVICE_TABLE(type, name) -#endif +static typeof(name) __mod_device_table(type, name) \ + __attribute__ ((used, alias(__stringify(name)))) /* Version of form [<epoch>:]<version>[-<extra-version>]. * Or for CVS/RCS ID version, everything but the number is stripped. @@ -236,20 +283,21 @@ extern const typeof(name) __mod_##type##__##name##_device_table \ #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, \ + 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, \ }, \ - .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 + .module_name = KBUILD_MODNAME, \ + .version = _version, \ + } #endif /* Optional firmware file (or files) needed by the module @@ -257,22 +305,9 @@ extern const typeof(name) __mod_##type##__##name##_device_table \ * files require multiple MODULE_FIRMWARE() specifiers */ #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) -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)))) +#define MODULE_IMPORT_NS(ns) MODULE_INFO(import_ns, ns) -/* 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; -}; +struct notifier_block; enum module_state { MODULE_STATE_LIVE, /* Normal state. */ @@ -286,17 +321,48 @@ struct mod_tree_node { struct latch_tree_node node; }; -struct module_layout { - /* The actual code + data. */ +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; - /* Total size. */ + bool is_rox; unsigned int size; - /* The size of the executable code. */ - unsigned int text_size; - /* Size of RO section of the module (text+rodata) */ - unsigned int ro_size; - /* Size of RO after init section */ - unsigned int ro_after_init_size; #ifdef CONFIG_MODULES_TREE_LOOKUP struct mod_tree_node mtn; @@ -305,18 +371,27 @@ struct module_layout { #ifdef CONFIG_MODULES_TREE_LOOKUP /* Only touch one cacheline for common rbtree-for-core-layout case. */ -#define __module_layout_align ____cacheline_aligned +#define __module_memory_align ____cacheline_aligned #else -#define __module_layout_align +#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; @@ -334,6 +409,11 @@ struct module { /* 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; @@ -343,9 +423,14 @@ struct module { /* Exported symbols */ const struct kernel_symbol *syms; - const s32 *crcs; + 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; @@ -356,19 +441,8 @@ struct module { /* GPL-only exported symbols. */ unsigned int num_gpl_syms; const struct kernel_symbol *gpl_syms; - const s32 *gpl_crcs; - -#ifdef CONFIG_UNUSED_SYMBOLS - /* unused exported symbols. */ - const struct kernel_symbol *unused_syms; - const s32 *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 s32 *unused_gpl_crcs; -#endif + const u32 *gpl_crcs; + bool using_gplonly_symbols; #ifdef CONFIG_MODULE_SIG /* Signature was verified. */ @@ -377,11 +451,6 @@ struct module { bool async_probe_requested; - /* symbols that will be GPL-only in the near future. */ - const struct kernel_symbol *gpl_future_syms; - const s32 *gpl_future_crcs; - unsigned int num_gpl_future_syms; - /* Exception table */ unsigned int num_exentries; struct exception_table_entry *extable; @@ -389,9 +458,7 @@ struct module { /* Startup function. */ int (*init)(void); - /* Core layout: rbtree is accessed frequently, so keep together. */ - struct module_layout core_layout __module_layout_align; - struct module_layout init_layout; + struct module_memory mem[MOD_MEM_NUM_TYPES] __module_memory_align; /* Arch-specific module values */ struct mod_arch_specific arch; @@ -407,7 +474,7 @@ struct module { #ifdef CONFIG_KALLSYMS /* Protected by RCU and/or module_mutex: use rcu_dereference() */ - struct mod_kallsyms *kallsyms; + struct mod_kallsyms __rcu *kallsyms; struct mod_kallsyms core_kallsyms; /* Section attributes */ @@ -426,12 +493,28 @@ struct module { void __percpu *percpu; unsigned int percpu_size; #endif + void *noinstr_text_start; + unsigned int noinstr_text_size; #ifdef CONFIG_TRACEPOINTS unsigned int num_tracepoints; - struct tracepoint * const *tracepoints_ptrs; + tracepoint_ptr_t *tracepoints_ptrs; +#endif +#ifdef CONFIG_TREE_SRCU + unsigned int num_srcu_structs; + struct srcu_struct **srcu_struct_ptrs; #endif -#ifdef HAVE_JUMP_LABEL +#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 @@ -445,19 +528,41 @@ struct module { struct trace_eval_map **trace_evals; unsigned int num_trace_evals; #endif -#ifdef CONFIG_FTRACE_MCOUNT_RECORD +#ifdef CONFIG_DYNAMIC_FTRACE 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 */ + /* 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; @@ -475,21 +580,49 @@ struct module { 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 -extern struct mutex module_mutex; +#ifdef CONFIG_MODULES + +/* 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))); }) + +#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 int module_is_live(struct module *mod) +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); @@ -497,18 +630,35 @@ 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) { - return (unsigned long)mod->core_layout.base <= addr && - addr < (unsigned long)mod->core_layout.base + mod->core_layout.size; + 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) { - return (unsigned long)mod->init_layout.base <= addr && - addr < (unsigned long)mod->init_layout.base + mod->init_layout.size; + 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) @@ -516,70 +666,63 @@ 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. */ +/* Search for module by name: must be in a RCU critical section. */ struct module *find_module(const char *name); -struct symsearch { - const struct kernel_symbol *start, *stop; - const s32 *crcs; - enum { - NOT_GPL_ONLY, - GPL_ONLY, - WILL_BE_GPL_ONLY, - } licence; - bool unused; -}; - -/* - * Search for an exported symbol by name. - * - * Must be called with module_mutex held or preemption disabled. - */ -const struct kernel_symbol *find_symbol(const char *name, - struct module **owner, - const s32 **crc, - bool gplok, - bool warn); - -/* - * Walk the exported symbol table - * - * Must be called with module_mutex held or preemption disabled. - */ -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 __noreturn __module_put_and_exit(struct module *mod, +extern void __noreturn __module_put_and_kthread_exit(struct module *mod, long code); -#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, 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(VMLINUX_SYMBOL_STR(x)) +#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); -/* This is the Right Way to get a module: if it fails, it's being removed, - * so pretend it's not there. */ +/** + * 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*/ @@ -597,7 +740,6 @@ static inline void __module_get(struct module *module) #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) \ @@ -606,16 +748,8 @@ int ref_module(struct module *a, struct module *b); __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); +/* 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); @@ -627,17 +761,18 @@ static inline bool module_requested_async_probing(struct module *module) return module && module->async_probe_requested; } -#ifdef CONFIG_LIVEPATCH static inline bool is_livepatch_module(struct module *mod) { +#ifdef CONFIG_LIVEPATCH return mod->klp; -} -#else /* !CONFIG_LIVEPATCH */ -static inline bool is_livepatch_module(struct module *mod) -{ +#else return false; +#endif } -#endif /* CONFIG_LIVEPATCH */ + +void set_module_sig_enforced(void); + +void module_for_each_mod(int(*func)(struct module *mod, void *data), void *data); #else /* !CONFIG_MODULES... */ @@ -671,8 +806,25 @@ 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)); &(x); }) +#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) @@ -691,74 +843,53 @@ 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) +static inline int register_module_notifier(struct notifier_block *nb) { - return NULL; + /* no events will happen anyway, so this can always succeed */ + return 0; } -static inline int lookup_module_symbol_name(unsigned long addr, char *symname) +static inline int unregister_module_notifier(struct notifier_block *nb) { - return -ERANGE; + return 0; } -static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) -{ - return -ERANGE; -} +#define module_put_and_kthread_exit(code) kthread_exit(code) -static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, - char *type, char *name, - char *module_name, int *exported) +static inline void print_modules(void) { - return -ERANGE; } -static inline unsigned long module_kallsyms_lookup_name(const char *name) +static inline bool module_requested_async_probing(struct module *module) { - return 0; + return false; } -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) +static inline void set_module_sig_enforced(void) { - /* no events will happen anyway, so this can always succeed */ - return 0; } -static inline int unregister_module_notifier(struct notifier_block *nb) +/* Dereference module function descriptor */ +static inline +void *dereference_module_function_descriptor(struct module *mod, void *ptr) { - return 0; + return ptr; } -#define module_put_and_exit(code) do_exit(code) - -static inline void print_modules(void) +static inline bool module_is_coming(struct module *mod) { + return false; } -static inline bool module_requested_async_probing(struct module *module) +static inline void module_for_each_mod(int(*func)(struct module *mod, void *data), void *data) { - return false; } - #endif /* CONFIG_MODULES */ #ifdef CONFIG_SYSFS extern struct kset *module_kset; -extern struct kobj_type module_ktype; -extern int module_sysfs_initialized; +extern const struct kobj_type module_ktype; #endif /* CONFIG_SYSFS */ #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) @@ -767,18 +898,6 @@ extern int module_sysfs_initialized; #define __MODULE_STRING(x) __stringify(x) -#ifdef CONFIG_STRICT_MODULE_RWX -extern void set_all_modules_text_rw(void); -extern void set_all_modules_text_ro(void); -extern void module_enable_ro(const struct module *mod, bool after_init); -extern void module_disable_ro(const struct module *mod); -#else -static inline void set_all_modules_text_rw(void) { } -static inline void set_all_modules_text_ro(void) { } -static inline void module_enable_ro(const struct module *mod, bool after_init) { } -static inline void module_disable_ro(const struct module *mod) { } -#endif - #ifdef CONFIG_GENERIC_BUG void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, struct module *); @@ -794,16 +913,112 @@ static inline void module_bug_finalize(const Elf_Ehdr *hdr, 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 */ + +/* Define __free(module_put) macro for struct module *. */ +DEFINE_FREE(module_put, struct module *, if (_T) module_put(_T)) + #endif /* _LINUX_MODULE_H */ |