666 строки
18 KiB
C
666 строки
18 KiB
C
#ifndef _LINUX_MODULE_H
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#define _LINUX_MODULE_H
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/*
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* Dynamic loading of modules into the kernel.
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*
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* Rewritten by Richard Henderson <rth@tamu.edu> Dec 1996
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* Rewritten again by Rusty Russell, 2002
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*/
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#include <linux/list.h>
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#include <linux/stat.h>
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#include <linux/compiler.h>
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#include <linux/cache.h>
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#include <linux/kmod.h>
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#include <linux/elf.h>
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#include <linux/stringify.h>
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#include <linux/kobject.h>
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#include <linux/moduleparam.h>
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#include <linux/tracepoint.h>
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#include <linux/export.h>
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#include <linux/percpu.h>
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#include <asm/module.h>
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/* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */
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#define MODULE_SIG_STRING "~Module signature appended~\n"
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/* Not Yet Implemented */
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#define MODULE_SUPPORTED_DEVICE(name)
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#define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
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struct modversion_info
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{
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unsigned long crc;
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char name[MODULE_NAME_LEN];
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};
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struct module;
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struct module_kobject {
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struct kobject kobj;
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struct module *mod;
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struct kobject *drivers_dir;
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struct module_param_attrs *mp;
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struct completion *kobj_completion;
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};
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struct module_attribute {
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struct attribute attr;
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ssize_t (*show)(struct module_attribute *, struct module_kobject *,
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char *);
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ssize_t (*store)(struct module_attribute *, struct module_kobject *,
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const char *, size_t count);
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void (*setup)(struct module *, const char *);
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int (*test)(struct module *);
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void (*free)(struct module *);
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};
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struct module_version_attribute {
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struct module_attribute mattr;
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const char *module_name;
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const char *version;
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} __attribute__ ((__aligned__(sizeof(void *))));
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extern ssize_t __modver_version_show(struct module_attribute *,
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struct module_kobject *, char *);
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extern struct module_attribute module_uevent;
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/* These are either module local, or the kernel's dummy ones. */
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extern int init_module(void);
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extern void cleanup_module(void);
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/* Archs provide a method of finding the correct exception table. */
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struct exception_table_entry;
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const struct exception_table_entry *
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search_extable(const struct exception_table_entry *first,
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const struct exception_table_entry *last,
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unsigned long value);
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void sort_extable(struct exception_table_entry *start,
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struct exception_table_entry *finish);
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void sort_main_extable(void);
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void trim_init_extable(struct module *m);
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#ifdef MODULE
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#define MODULE_GENERIC_TABLE(gtype,name) \
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extern const struct gtype##_id __mod_##gtype##_table \
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__attribute__ ((unused, alias(__stringify(name))))
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#else /* !MODULE */
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#define MODULE_GENERIC_TABLE(gtype,name)
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#endif
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/* Generic info of form tag = "info" */
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#define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
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/* For userspace: you can also call me... */
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#define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
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/* Soft module dependencies. See man modprobe.d for details.
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* Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz")
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*/
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#define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep)
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/*
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* The following license idents are currently accepted as indicating free
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* software modules
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*
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* "GPL" [GNU Public License v2 or later]
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* "GPL v2" [GNU Public License v2]
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* "GPL and additional rights" [GNU Public License v2 rights and more]
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* "Dual BSD/GPL" [GNU Public License v2
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* or BSD license choice]
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* "Dual MIT/GPL" [GNU Public License v2
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* or MIT license choice]
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* "Dual MPL/GPL" [GNU Public License v2
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* or Mozilla license choice]
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*
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* The following other idents are available
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*
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* "Proprietary" [Non free products]
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*
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* There are dual licensed components, but when running with Linux it is the
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* GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
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* is a GPL combined work.
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*
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* This exists for several reasons
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* 1. So modinfo can show license info for users wanting to vet their setup
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* is free
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* 2. So the community can ignore bug reports including proprietary modules
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* 3. So vendors can do likewise based on their own policies
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*/
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#define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
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/*
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* Author(s), use "Name <email>" or just "Name", for multiple
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* authors use multiple MODULE_AUTHOR() statements/lines.
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*/
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#define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
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/* What your module does. */
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#define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
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#define MODULE_DEVICE_TABLE(type,name) \
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MODULE_GENERIC_TABLE(type##_device,name)
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/* Version of form [<epoch>:]<version>[-<extra-version>].
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Or for CVS/RCS ID version, everything but the number is stripped.
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<epoch>: A (small) unsigned integer which allows you to start versions
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anew. If not mentioned, it's zero. eg. "2:1.0" is after
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"1:2.0".
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<version>: The <version> may contain only alphanumerics and the
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character `.'. Ordered by numeric sort for numeric parts,
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ascii sort for ascii parts (as per RPM or DEB algorithm).
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<extraversion>: Like <version>, but inserted for local
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customizations, eg "rh3" or "rusty1".
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Using this automatically adds a checksum of the .c files and the
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local headers in "srcversion".
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*/
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#if defined(MODULE) || !defined(CONFIG_SYSFS)
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#define MODULE_VERSION(_version) MODULE_INFO(version, _version)
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#else
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#define MODULE_VERSION(_version) \
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static struct module_version_attribute ___modver_attr = { \
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.mattr = { \
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.attr = { \
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.name = "version", \
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.mode = S_IRUGO, \
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}, \
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.show = __modver_version_show, \
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}, \
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.module_name = KBUILD_MODNAME, \
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.version = _version, \
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}; \
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static const struct module_version_attribute \
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__used __attribute__ ((__section__ ("__modver"))) \
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* __moduleparam_const __modver_attr = &___modver_attr
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#endif
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/* Optional firmware file (or files) needed by the module
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* format is simply firmware file name. Multiple firmware
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* files require multiple MODULE_FIRMWARE() specifiers */
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#define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
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/* Given an address, look for it in the exception tables */
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const struct exception_table_entry *search_exception_tables(unsigned long add);
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struct notifier_block;
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#ifdef CONFIG_MODULES
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extern int modules_disabled; /* for sysctl */
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/* Get/put a kernel symbol (calls must be symmetric) */
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void *__symbol_get(const char *symbol);
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void *__symbol_get_gpl(const char *symbol);
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#define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x))))
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/* modules using other modules: kdb wants to see this. */
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struct module_use {
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struct list_head source_list;
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struct list_head target_list;
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struct module *source, *target;
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};
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enum module_state {
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MODULE_STATE_LIVE, /* Normal state. */
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MODULE_STATE_COMING, /* Full formed, running module_init. */
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MODULE_STATE_GOING, /* Going away. */
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MODULE_STATE_UNFORMED, /* Still setting it up. */
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};
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/**
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* struct module_ref - per cpu module reference counts
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* @incs: number of module get on this cpu
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* @decs: number of module put on this cpu
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*
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* We force an alignment on 8 or 16 bytes, so that alloc_percpu()
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* put @incs/@decs in same cache line, with no extra memory cost,
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* since alloc_percpu() is fine grained.
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*/
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struct module_ref {
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unsigned long incs;
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unsigned long decs;
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} __attribute((aligned(2 * sizeof(unsigned long))));
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struct module
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{
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enum module_state state;
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/* Member of list of modules */
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struct list_head list;
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/* Unique handle for this module */
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char name[MODULE_NAME_LEN];
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/* Sysfs stuff. */
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struct module_kobject mkobj;
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struct module_attribute *modinfo_attrs;
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const char *version;
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const char *srcversion;
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struct kobject *holders_dir;
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/* Exported symbols */
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const struct kernel_symbol *syms;
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const unsigned long *crcs;
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unsigned int num_syms;
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/* Kernel parameters. */
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struct kernel_param *kp;
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unsigned int num_kp;
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/* GPL-only exported symbols. */
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unsigned int num_gpl_syms;
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const struct kernel_symbol *gpl_syms;
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const unsigned long *gpl_crcs;
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#ifdef CONFIG_UNUSED_SYMBOLS
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/* unused exported symbols. */
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const struct kernel_symbol *unused_syms;
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const unsigned long *unused_crcs;
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unsigned int num_unused_syms;
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/* GPL-only, unused exported symbols. */
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unsigned int num_unused_gpl_syms;
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const struct kernel_symbol *unused_gpl_syms;
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const unsigned long *unused_gpl_crcs;
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#endif
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#ifdef CONFIG_MODULE_SIG
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/* Signature was verified. */
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bool sig_ok;
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#endif
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/* symbols that will be GPL-only in the near future. */
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const struct kernel_symbol *gpl_future_syms;
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const unsigned long *gpl_future_crcs;
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unsigned int num_gpl_future_syms;
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/* Exception table */
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unsigned int num_exentries;
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struct exception_table_entry *extable;
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/* Startup function. */
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int (*init)(void);
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/* If this is non-NULL, vfree after init() returns */
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void *module_init;
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/* Here is the actual code + data, vfree'd on unload. */
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void *module_core;
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/* Here are the sizes of the init and core sections */
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unsigned int init_size, core_size;
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/* The size of the executable code in each section. */
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unsigned int init_text_size, core_text_size;
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/* Size of RO sections of the module (text+rodata) */
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unsigned int init_ro_size, core_ro_size;
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/* Arch-specific module values */
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struct mod_arch_specific arch;
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unsigned int taints; /* same bits as kernel:tainted */
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#ifdef CONFIG_GENERIC_BUG
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/* Support for BUG */
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unsigned num_bugs;
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struct list_head bug_list;
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struct bug_entry *bug_table;
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#endif
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#ifdef CONFIG_KALLSYMS
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/*
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* We keep the symbol and string tables for kallsyms.
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* The core_* fields below are temporary, loader-only (they
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* could really be discarded after module init).
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*/
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Elf_Sym *symtab, *core_symtab;
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unsigned int num_symtab, core_num_syms;
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char *strtab, *core_strtab;
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/* Section attributes */
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struct module_sect_attrs *sect_attrs;
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/* Notes attributes */
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struct module_notes_attrs *notes_attrs;
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#endif
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/* The command line arguments (may be mangled). People like
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keeping pointers to this stuff */
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char *args;
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#ifdef CONFIG_SMP
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/* Per-cpu data. */
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void __percpu *percpu;
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unsigned int percpu_size;
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#endif
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#ifdef CONFIG_TRACEPOINTS
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unsigned int num_tracepoints;
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struct tracepoint * const *tracepoints_ptrs;
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#endif
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#ifdef HAVE_JUMP_LABEL
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struct jump_entry *jump_entries;
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unsigned int num_jump_entries;
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#endif
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#ifdef CONFIG_TRACING
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unsigned int num_trace_bprintk_fmt;
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const char **trace_bprintk_fmt_start;
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#endif
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#ifdef CONFIG_EVENT_TRACING
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struct ftrace_event_call **trace_events;
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unsigned int num_trace_events;
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#endif
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#ifdef CONFIG_FTRACE_MCOUNT_RECORD
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unsigned int num_ftrace_callsites;
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unsigned long *ftrace_callsites;
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#endif
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#ifdef CONFIG_MODULE_UNLOAD
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/* What modules depend on me? */
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struct list_head source_list;
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/* What modules do I depend on? */
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struct list_head target_list;
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/* Who is waiting for us to be unloaded */
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struct task_struct *waiter;
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/* Destruction function. */
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void (*exit)(void);
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struct module_ref __percpu *refptr;
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#endif
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#ifdef CONFIG_CONSTRUCTORS
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/* Constructor functions. */
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ctor_fn_t *ctors;
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unsigned int num_ctors;
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#endif
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};
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#ifndef MODULE_ARCH_INIT
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#define MODULE_ARCH_INIT {}
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#endif
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extern struct mutex module_mutex;
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/* FIXME: It'd be nice to isolate modules during init, too, so they
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aren't used before they (may) fail. But presently too much code
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(IDE & SCSI) require entry into the module during init.*/
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static inline int module_is_live(struct module *mod)
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{
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return mod->state != MODULE_STATE_GOING;
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}
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struct module *__module_text_address(unsigned long addr);
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struct module *__module_address(unsigned long addr);
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bool is_module_address(unsigned long addr);
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bool is_module_percpu_address(unsigned long addr);
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bool is_module_text_address(unsigned long addr);
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static inline int within_module_core(unsigned long addr, const struct module *mod)
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{
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return (unsigned long)mod->module_core <= addr &&
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addr < (unsigned long)mod->module_core + mod->core_size;
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}
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static inline int within_module_init(unsigned long addr, const struct module *mod)
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{
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return (unsigned long)mod->module_init <= addr &&
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addr < (unsigned long)mod->module_init + mod->init_size;
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}
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/* Search for module by name: must hold module_mutex. */
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struct module *find_module(const char *name);
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struct symsearch {
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const struct kernel_symbol *start, *stop;
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const unsigned long *crcs;
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enum {
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NOT_GPL_ONLY,
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GPL_ONLY,
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WILL_BE_GPL_ONLY,
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} licence;
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bool unused;
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};
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/* Search for an exported symbol by name. */
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const struct kernel_symbol *find_symbol(const char *name,
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struct module **owner,
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const unsigned long **crc,
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bool gplok,
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bool warn);
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/* Walk the exported symbol table */
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bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
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struct module *owner,
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void *data), void *data);
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/* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
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symnum out of range. */
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int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
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char *name, char *module_name, int *exported);
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/* Look for this name: can be of form module:name. */
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unsigned long module_kallsyms_lookup_name(const char *name);
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int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
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struct module *, unsigned long),
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void *data);
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extern void __module_put_and_exit(struct module *mod, long code)
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__attribute__((noreturn));
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#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
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#ifdef CONFIG_MODULE_UNLOAD
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unsigned long module_refcount(struct module *mod);
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void __symbol_put(const char *symbol);
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#define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x))
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void symbol_put_addr(void *addr);
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/* Sometimes we know we already have a refcount, and it's easier not
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to handle the error case (which only happens with rmmod --wait). */
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extern void __module_get(struct module *module);
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/* This is the Right Way to get a module: if it fails, it's being removed,
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* so pretend it's not there. */
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extern bool try_module_get(struct module *module);
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extern void module_put(struct module *module);
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#else /*!CONFIG_MODULE_UNLOAD*/
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static inline int try_module_get(struct module *module)
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{
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return !module || module_is_live(module);
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}
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static inline void module_put(struct module *module)
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{
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}
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static inline void __module_get(struct module *module)
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{
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}
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#define symbol_put(x) do { } while(0)
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#define symbol_put_addr(p) do { } while(0)
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#endif /* CONFIG_MODULE_UNLOAD */
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int ref_module(struct module *a, struct module *b);
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/* This is a #define so the string doesn't get put in every .o file */
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#define module_name(mod) \
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({ \
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struct module *__mod = (mod); \
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__mod ? __mod->name : "kernel"; \
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})
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/* For kallsyms to ask for address resolution. namebuf should be at
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* least KSYM_NAME_LEN long: a pointer to namebuf is returned if
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* found, otherwise NULL. */
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const char *module_address_lookup(unsigned long addr,
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unsigned long *symbolsize,
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unsigned long *offset,
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char **modname,
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char *namebuf);
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int lookup_module_symbol_name(unsigned long addr, char *symname);
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int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
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/* For extable.c to search modules' exception tables. */
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const struct exception_table_entry *search_module_extables(unsigned long addr);
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int register_module_notifier(struct notifier_block * nb);
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int unregister_module_notifier(struct notifier_block * nb);
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extern void print_modules(void);
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#else /* !CONFIG_MODULES... */
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/* Given an address, look for it in the exception tables. */
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static inline const struct exception_table_entry *
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search_module_extables(unsigned long addr)
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{
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return NULL;
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|
}
|
|
|
|
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 */
|