* Rewritten by Richard Henderson <rth@tamu.edu> Dec 1996
* Rewritten again by Rusty Russell, 2002
*/
-#include <linux/config.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/stat.h>
#include <linux/compiler.h>
#include <linux/stringify.h>
#include <linux/kobject.h>
#include <linux/moduleparam.h>
-#include <asm/local.h>
+#include <linux/tracepoint.h>
+#include <linux/percpu.h>
#include <asm/module.h>
+#include <trace/events/module.h>
+
/* Not Yet Implemented */
#define MODULE_SUPPORTED_DEVICE(name)
-/* v850 toolchain uses a `_' prefix for all user symbols */
-#ifndef MODULE_SYMBOL_PREFIX
+/* Some toolchains use a `_' prefix for all user symbols. */
+#ifdef CONFIG_SYMBOL_PREFIX
+#define MODULE_SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX
+#else
#define MODULE_SYMBOL_PREFIX ""
#endif
-#define MODULE_NAME_LEN (64 - sizeof(unsigned long))
+#define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
struct kernel_symbol
{
{
struct kobject kobj;
struct module *mod;
+ struct kobject *drivers_dir;
+ struct module_param_attrs *mp;
};
/* These are either module local, or the kernel's dummy ones. */
void sort_extable(struct exception_table_entry *start,
struct exception_table_entry *finish);
void sort_main_extable(void);
-
-extern struct subsystem module_subsys;
+void trim_init_extable(struct module *m);
#ifdef MODULE
#define MODULE_GENERIC_TABLE(gtype,name) \
* "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]
*
*/
#define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
-/* Author, ideally of form NAME <EMAIL>[, NAME <EMAIL>]*[ and NAME <EMAIL>] */
+/*
+ * 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_VERSION(_version) MODULE_INFO(version, _version)
+/* 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);
#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(MODULE_SYMBOL_PREFIX #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;
+};
+
#ifndef __GENKSYMS__
#ifdef CONFIG_MODVERSIONS
/* Mark the CRC weak since genksyms apparently decides not to
#define __CRC_SYMBOL(sym, sec) \
extern void *__crc_##sym __attribute__((weak)); \
static const unsigned long __kcrctab_##sym \
- __attribute_used__ \
+ __used \
__attribute__((section("__kcrctab" sec), unused)) \
= (unsigned long) &__crc_##sym;
#else
/* For every exported symbol, place a struct in the __ksymtab section */
#define __EXPORT_SYMBOL(sym, sec) \
+ extern typeof(sym) sym; \
__CRC_SYMBOL(sym, sec) \
static const char __kstrtab_##sym[] \
- __attribute__((section("__ksymtab_strings"))) \
+ __attribute__((section("__ksymtab_strings"), aligned(1))) \
= MODULE_SYMBOL_PREFIX #sym; \
static const struct kernel_symbol __ksymtab_##sym \
- __attribute_used__ \
+ __used \
__attribute__((section("__ksymtab" sec), unused)) \
= { (unsigned long)&sym, __kstrtab_##sym }
#define EXPORT_SYMBOL_GPL(sym) \
__EXPORT_SYMBOL(sym, "_gpl")
+#define EXPORT_SYMBOL_GPL_FUTURE(sym) \
+ __EXPORT_SYMBOL(sym, "_gpl_future")
+
+
+#ifdef CONFIG_UNUSED_SYMBOLS
+#define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
+#define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
+#else
+#define EXPORT_UNUSED_SYMBOL(sym)
+#define EXPORT_UNUSED_SYMBOL_GPL(sym)
#endif
-struct module_ref
-{
- local_t count;
-} ____cacheline_aligned;
+#endif
enum module_state
{
MODULE_STATE_GOING,
};
-/* Similar stuff for section attributes. */
-#define MODULE_SECT_NAME_LEN 32
-struct module_sect_attr
-{
- struct module_attribute mattr;
- char name[MODULE_SECT_NAME_LEN];
- unsigned long address;
-};
-
-struct module_sect_attrs
-{
- struct attribute_group grp;
- struct module_sect_attr attrs[0];
-};
-
-struct module_param_attrs;
-
struct module
{
enum module_state state;
/* Sysfs stuff. */
struct module_kobject mkobj;
- struct module_param_attrs *param_attrs;
+ struct module_attribute *modinfo_attrs;
const char *version;
const char *srcversion;
+ struct kobject *holders_dir;
/* Exported symbols */
const struct kernel_symbol *syms;
- unsigned int num_syms;
const unsigned long *crcs;
+ unsigned int num_syms;
+
+ /* Kernel parameters. */
+ struct kernel_param *kp;
+ unsigned int num_kp;
/* GPL-only exported symbols. */
- const struct kernel_symbol *gpl_syms;
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
+
+ /* 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;
- const struct exception_table_entry *extable;
+ struct exception_table_entry *extable;
/* Startup function. */
int (*init)(void);
void *module_core;
/* Here are the sizes of the init and core sections */
- unsigned long init_size, core_size;
+ unsigned int init_size, core_size;
/* The size of the executable code in each section. */
- unsigned long init_text_size, core_text_size;
+ unsigned int init_text_size, core_text_size;
/* Arch-specific module values */
struct mod_arch_specific arch;
- /* Am I unsafe to unload? */
- int unsafe;
+ unsigned int taints; /* same bits as kernel:tainted */
- /* Am I GPL-compatible */
- int license_gplok;
-
-#ifdef CONFIG_MODULE_UNLOAD
- /* Reference counts */
- struct module_ref ref[NR_CPUS];
-
- /* What modules depend on me? */
- struct list_head modules_which_use_me;
-
- /* Who is waiting for us to be unloaded */
- struct task_struct *waiter;
-
- /* Destruction function. */
- void (*exit)(void);
+#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. */
- Elf_Sym *symtab;
- unsigned long num_symtab;
- char *strtab;
+ /*
+ * 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
+#ifdef CONFIG_SMP
/* Per-cpu data. */
- void *percpu;
+ void __percpu *percpu;
+ unsigned int percpu_size;
+#endif
/* The command line arguments (may be mangled). People like
keeping pointers to this stuff */
char *args;
+#ifdef CONFIG_TRACEPOINTS
+ struct tracepoint *tracepoints;
+ unsigned int num_tracepoints;
+#endif
+
+#ifdef CONFIG_TRACING
+ const char **trace_bprintk_fmt_start;
+ unsigned int num_trace_bprintk_fmt;
+#endif
+#ifdef CONFIG_EVENT_TRACING
+ struct ftrace_event_call *trace_events;
+ unsigned int num_trace_events;
+#endif
+#ifdef CONFIG_FTRACE_MCOUNT_RECORD
+ unsigned long *ftrace_callsites;
+ unsigned int num_ftrace_callsites;
+#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;
+
+ /* Who is waiting for us to be unloaded */
+ struct task_struct *waiter;
+
+ /* Destruction function. */
+ void (*exit)(void);
+
+ struct module_ref {
+ unsigned int incs;
+ unsigned int decs;
+ } __percpu *refptr;
+#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
return mod->state != MODULE_STATE_GOING;
}
-/* Is this address in a module? (second is with no locks, for oops) */
-struct module *module_text_address(unsigned long addr);
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 int within_module_core(unsigned long addr, struct module *mod)
+{
+ return (unsigned long)mod->module_core <= addr &&
+ addr < (unsigned long)mod->module_core + mod->core_size;
+}
+
+static inline int within_module_init(unsigned long addr, struct module *mod)
+{
+ return (unsigned long)mod->module_init <= addr &&
+ addr < (unsigned long)mod->module_init + mod->init_size;
+}
+
+/* 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;
+};
-/* Returns module and fills in value, defined and namebuf, or NULL if
+/* 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(bool (*fn)(const struct symsearch *arr, struct module *owner,
+ unsigned int symnum, void *data), void *data);
+
+/* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
symnum out of range. */
-struct module *module_get_kallsym(unsigned int symnum,
- unsigned long *value,
- char *type,
- char namebuf[128]);
+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 is_exported(const char *name, const struct module *mod);
+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));
static inline void __module_get(struct module *module)
{
if (module) {
- BUG_ON(module_refcount(module) == 0);
- local_inc(&module->ref[get_cpu()].count);
- put_cpu();
+ preempt_disable();
+ __this_cpu_inc(module->refptr->incs);
+ trace_module_get(module, _THIS_IP_);
+ preempt_enable();
}
}
int ret = 1;
if (module) {
- unsigned int cpu = get_cpu();
- if (likely(module_is_live(module)))
- local_inc(&module->ref[cpu].count);
- else
+ preempt_disable();
+
+ if (likely(module_is_live(module))) {
+ __this_cpu_inc(module->refptr->incs);
+ trace_module_get(module, _THIS_IP_);
+ } else
ret = 0;
- put_cpu();
+
+ preempt_enable();
}
return ret;
}
-static inline void module_put(struct module *module)
-{
- if (module) {
- unsigned int cpu = get_cpu();
- local_dec(&module->ref[cpu].count);
- /* Maybe they're waiting for us to drop reference? */
- if (unlikely(!module_is_live(module)))
- wake_up_process(module->waiter);
- put_cpu();
- }
-}
+extern void module_put(struct module *module);
#else /*!CONFIG_MODULE_UNLOAD*/
static inline int try_module_get(struct module *module)
#define symbol_put_addr(p) do { } while(0)
#endif /* CONFIG_MODULE_UNLOAD */
+int use_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) \
__mod ? __mod->name : "kernel"; \
})
-#define __unsafe(mod) \
-do { \
- if (mod && !(mod)->unsafe) { \
- printk(KERN_WARNING \
- "Module %s cannot be unloaded due to unsafe usage in" \
- " %s:%u\n", (mod)->name, __FILE__, __LINE__); \
- (mod)->unsafe = 1; \
- } \
-} while(0)
-
-/* For kallsyms to ask for address resolution. NULL means not found. */
+/* 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);
+ 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);
extern void print_modules(void);
-struct device_driver;
-void module_add_driver(struct module *, struct device_driver *);
-void module_remove_driver(struct device_driver *);
+extern void module_update_tracepoints(void);
+extern int module_get_iter_tracepoints(struct tracepoint_iter *iter);
#else /* !CONFIG_MODULES... */
#define EXPORT_SYMBOL(sym)
#define EXPORT_SYMBOL_GPL(sym)
+#define EXPORT_SYMBOL_GPL_FUTURE(sym)
+#define EXPORT_UNUSED_SYMBOL(sym)
+#define EXPORT_UNUSED_SYMBOL_GPL(sym)
/* Given an address, look for it in the exception tables. */
static inline const struct exception_table_entry *
return NULL;
}
-/* Is this address in a module? */
-static inline struct module *module_text_address(unsigned long addr)
+static inline struct module *__module_address(unsigned long addr)
{
return NULL;
}
-/* Is this address in a module? (don't take a lock, we're oopsing) */
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 module_name(mod) "kernel"
-#define __unsafe(mod)
-
/* 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)
+ unsigned long *symbolsize,
+ unsigned long *offset,
+ char **modname,
+ char *namebuf)
{
return NULL;
}
-static inline struct module *module_get_kallsym(unsigned int symnum,
- unsigned long *value,
- char *type,
- char namebuf[128])
+static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
{
- return NULL;
+ 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 is_exported(const char *name, const struct module *mod)
+static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
+ struct module *,
+ unsigned long),
+ void *data)
{
return 0;
}
{
}
-struct device_driver;
-struct module;
-
-static inline void module_add_driver(struct module *module, struct device_driver *driver)
+static inline void module_update_tracepoints(void)
{
}
-static inline void module_remove_driver(struct device_driver *driver)
+static inline int module_get_iter_tracepoints(struct tracepoint_iter *iter)
{
+ return 0;
}
#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 */
-struct obsolete_modparm {
- char name[64];
- char type[64-sizeof(void *)];
- void *addr;
-};
+#define __MODULE_STRING(x) __stringify(x)
-static inline void MODULE_PARM_(void) { }
-#ifdef MODULE
-/* DEPRECATED: Do not use. */
-#define MODULE_PARM(var,type) \
-extern struct obsolete_modparm __parm_##var \
-__attribute__((section("__obsparm"))); \
-struct obsolete_modparm __parm_##var = \
-{ __stringify(var), type, &MODULE_PARM_ }; \
-__MODULE_PARM_TYPE(var, type);
-#else
-#define MODULE_PARM(var,type) static void __attribute__((__unused__)) *__parm_##var = &MODULE_PARM_;
-#endif
-#define __MODULE_STRING(x) __stringify(x)
+#ifdef CONFIG_GENERIC_BUG
+int module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
+ struct module *);
+void module_bug_cleanup(struct module *);
+
+#else /* !CONFIG_GENERIC_BUG */
-/* Use symbol_get and symbol_put instead. You'll thank me. */
-#define HAVE_INTER_MODULE
-extern void __deprecated inter_module_register(const char *,
- struct module *, const void *);
-extern void __deprecated inter_module_unregister(const char *);
-extern const void * __deprecated inter_module_get_request(const char *,
- const char *);
-extern void __deprecated inter_module_put(const char *);
+static inline int module_bug_finalize(const Elf_Ehdr *hdr,
+ const Elf_Shdr *sechdrs,
+ struct module *mod)
+{
+ return 0;
+}
+static inline void module_bug_cleanup(struct module *mod) {}
+#endif /* CONFIG_GENERIC_BUG */
#endif /* _LINUX_MODULE_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff