1 files changed, 570 insertions, 0 deletions

diff --git a/include/linux/module.h b/include/linux/module.h
new file mode 100644
index 0000000000..0e432a0f4a
--- /dev/null
+++ b/include/linux/module.h
@@ -0,0 +1,570 @@
+#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/config.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#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 <asm/local.h>
+
+#include <asm/module.h>
+
+/* Not Yet Implemented */
+#define MODULE_SUPPORTED_DEVICE(name)
+
+/* v850 toolchain uses a `_' prefix for all user symbols */
+#ifndef MODULE_SYMBOL_PREFIX
+#define MODULE_SYMBOL_PREFIX ""
+#endif
+
+#define MODULE_NAME_LEN (64 - sizeof(unsigned long))
+
+struct kernel_symbol
+{
+        unsigned long value;
+        const char *name;
+};
+
+struct modversion_info
+{
+        unsigned long crc;
+        char name[MODULE_NAME_LEN];
+};
+
+struct module;
+
+struct module_attribute {
+        struct attribute attr;
+        ssize_t (*show)(struct module_attribute *, struct module *, char *);
+        ssize_t (*store)(struct module_attribute *, struct module *,
+                         const char *, size_t count);
+};
+
+struct module_kobject
+{
+        struct kobject kobj;
+        struct module *mod;
+};
+
+/* 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);
+
+extern struct subsystem module_subsys;
+
+#ifdef MODULE
+#define MODULE_GENERIC_TABLE(gtype,name)                        \
+extern const struct gtype##_id __mod_##gtype##_table            \
+  __attribute__ ((unused, alias(__stringify(name))))
+
+extern struct module __this_module;
+#define THIS_MODULE (&__this_module)
+#else  /* !MODULE */
+#define MODULE_GENERIC_TABLE(gtype,name)
+#define THIS_MODULE ((struct module *)0)
+#endif
+
+/* 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)
+
+/*
+ * 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 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, ideally of form NAME <EMAIL>[, NAME <EMAIL>]*[ and NAME <EMAIL>] */
+#define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
+  
+/* What your module does. */
+#define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
+
+/* One for each parameter, describing how to use it.  Some files do
+   multiple of these per line, so can't just use MODULE_INFO. */
+#define MODULE_PARM_DESC(_parm, desc) \
+        __MODULE_INFO(parm, _parm, #_parm ":" desc)
+
+#define MODULE_DEVICE_TABLE(type,name)          \
+  MODULE_GENERIC_TABLE(type##_device,name)
+
+/* 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".
+*/
+#define MODULE_VERSION(_version) MODULE_INFO(version, _version)
+
+/* 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
+
+/* 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)))
+
+#ifndef __GENKSYMS__
+#ifdef CONFIG_MODVERSIONS
+/* Mark the CRC weak since genksyms apparently decides not to
+ * generate a checksums for some symbols */
+#define __CRC_SYMBOL(sym, sec)                                  \
+        extern void *__crc_##sym __attribute__((weak));         \
+        static const unsigned long __kcrctab_##sym              \
+        __attribute_used__                                      \
+        __attribute__((section("__kcrctab" sec), unused))       \
+        = (unsigned long) &__crc_##sym;
+#else
+#define __CRC_SYMBOL(sym, sec)
+#endif
+
+/* For every exported symbol, place a struct in the __ksymtab section */
+#define __EXPORT_SYMBOL(sym, sec)                               \
+        __CRC_SYMBOL(sym, sec)                                  \
+        static const char __kstrtab_##sym[]                     \
+        __attribute__((section("__ksymtab_strings")))           \
+        = MODULE_SYMBOL_PREFIX #sym;                            \
+        static const struct kernel_symbol __ksymtab_##sym       \
+        __attribute_used__                                      \
+        __attribute__((section("__ksymtab" sec), unused))       \
+        = { (unsigned long)&sym, __kstrtab_##sym }
+
+#define EXPORT_SYMBOL(sym)                                      \
+        __EXPORT_SYMBOL(sym, "")
+
+#define EXPORT_SYMBOL_GPL(sym)                                  \
+        __EXPORT_SYMBOL(sym, "_gpl")
+
+#endif
+
+struct module_ref
+{
+        local_t count;
+} ____cacheline_aligned;
+
+enum module_state
+{
+        MODULE_STATE_LIVE,
+        MODULE_STATE_COMING,
+        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;
+
+        /* 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_param_attrs *param_attrs;
+
+        /* Exported symbols */
+        const struct kernel_symbol *syms;
+        unsigned int num_syms;
+        const unsigned long *crcs;
+
+        /* GPL-only exported symbols. */
+        const struct kernel_symbol *gpl_syms;
+        unsigned int num_gpl_syms;
+        const unsigned long *gpl_crcs;
+
+        /* Exception table */
+        unsigned int num_exentries;
+        const 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 long init_size, core_size;
+
+        /* The size of the executable code in each section.  */
+        unsigned long init_text_size, core_text_size;
+
+        /* Arch-specific module values */
+        struct mod_arch_specific arch;
+
+        /* Am I unsafe to unload? */
+        int unsafe;
+
+        /* 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);
+#endif
+
+#ifdef CONFIG_KALLSYMS
+        /* We keep the symbol and string tables for kallsyms. */
+        Elf_Sym *symtab;
+        unsigned long num_symtab;
+        char *strtab;
+
+        /* Section attributes */
+        struct module_sect_attrs *sect_attrs;
+#endif
+
+        /* Per-cpu data. */
+        void *percpu;
+
+        /* The command line arguments (may be mangled).  People like
+           keeping pointers to this stuff */
+        char *args;
+};
+
+/* 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;
+}
+
+/* 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);
+
+/* Returns module and fills in value, defined and namebuf, or NULL if
+   symnum out of range. */
+struct module *module_get_kallsym(unsigned int symnum,
+                                  unsigned long *value,
+                                  char *type,
+                                  char namebuf[128]);
+
+/* 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);
+
+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
+unsigned int module_refcount(struct module *mod);
+void __symbol_put(const char *symbol);
+#define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #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). */
+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();
+        }
+}
+
+static inline int try_module_get(struct module *module)
+{
+        int ret = 1;
+
+        if (module) {
+                unsigned int cpu = get_cpu();
+                if (likely(module_is_live(module)))
+                        local_inc(&module->ref[cpu].count);
+                else
+                        ret = 0;
+                put_cpu();
+        }
+        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();
+        }
+}
+
+#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 */
+
+/* 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";         \
+})
+
+#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. */
+const char *module_address_lookup(unsigned long addr,
+                                  unsigned long *symbolsize,
+                                  unsigned long *offset,
+                                  char **modname);
+
+/* 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);
+
+struct device_driver;
+void module_add_driver(struct module *, struct device_driver *);
+void module_remove_driver(struct device_driver *);
+
+#else /* !CONFIG_MODULES... */
+#define EXPORT_SYMBOL(sym)
+#define EXPORT_SYMBOL_GPL(sym)
+
+/* 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;
+}
+
+/* Is this address in a module? */
+static inline struct module *module_text_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;
+}
+
+/* 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"
+
+#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)
+{
+        return NULL;
+}
+
+static inline struct module *module_get_kallsym(unsigned int symnum,
+                                                unsigned long *value,
+                                                char *type,
+                                                char namebuf[128])
+{
+        return NULL;
+}
+
+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)
+{
+        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)
+{
+}
+
+struct device_driver;
+struct module;
+
+static inline void module_add_driver(struct module *module, struct device_driver *driver)
+{
+}
+
+static inline void module_remove_driver(struct device_driver *driver)
+{
+}
+
+#endif /* CONFIG_MODULES */
+
+#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;
+};
+
+static inline void MODULE_PARM_(void) { }
+#ifdef MODULE
+/* DEPRECATED: Do not use. */
+#define MODULE_PARM(var,type)                                               \
+struct obsolete_modparm __parm_##var __attribute__((section("__obsparm"))) = \
+{ __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)
+
+/* 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 *);
+
+#endif /* _LINUX_MODULE_H */