diff options
Diffstat (limited to 'include/module.h')
| -rw-r--r-- | include/module.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/module.h b/include/module.h index cea8c2e181..9099e5aeed 100644 --- a/include/module.h +++ b/include/module.h @@ -2,6 +2,7 @@ #ifndef __MODULE_H #define __MODULE_H +#include <init.h> #include <elf.h> #include <linux/compiler.h> #include <linux/export.h> @@ -13,6 +14,76 @@ #define MODULE_NAME_LEN (64 - sizeof(unsigned long)) +/* These are either module local, or the kernel's dummy ones. */ +extern int init_module(void); +extern void cleanup_module(void); + +#ifndef MODULE +/** + * module_init() - driver initialization entry point + * @x: function to be run at kernel boot time or module insertion + * + * module_init() will either be called during do_initcalls() (if + * builtin) or at module insertion time (if a module). There can only + * be one per module. + */ +#define module_init(x) device_initcall(x); + +/** + * module_exit() - driver exit entry point + * @x: function to be run when driver is removed + * + * module_exit() will wrap the driver clean-up code + * with cleanup_module() when used with rmmod when + * the driver is a module. If the driver is statically + * compiled into the kernel, module_exit() has no effect. + * There can only be one per module. + */ +#define module_exit(x) devshutdown_exitcall(x); + +#else /* MODULE */ + +/* + * In most cases loadable modules do not need custom + * initcall levels. There are still some valid cases where + * a driver may be needed early if built in, and does not + * matter when built as a loadable module. Like bus + * snooping debug drivers. + */ +#define core_initcall(fn) module_init(fn) +#define postcore_initcall(fn) module_init(fn) +#define console_initcall(fn) module_init(fn) +#define postconsole_initcall(fn) module_init(fn) +#define mem_initcall(fn) module_init(fn) +#define mmu_initcall(fn) module_init(fn) +#define postmmu_initcall(fn) module_init(fn) +#define coredevice_initcall(fn) module_init(fn) +#define fs_initcall(fn) module_init(fn) +#define device_initcall(fn) module_init(fn) +#define late_initcall(fn) module_init(fn) + +#define early_exitcall(fn) module_exit(fn) +#define predevshutdown_exitcall(fn) module_exit(fn) +#define devshutdown_exitcall(fn) module_exit(fn) +#define postdevshutdown_exitcall(fn) module_exit(fn) +#define prearchshutdown_exitcall(fn) module_exit(fn) +#define archshutdown_exitcall(fn) module_exit(fn) +#define postarchshutdown_exitcall(fn) module_exit(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))); + +/* 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))); + +#endif + #ifdef CONFIG_MODULES #include <asm/module.h> @@ -51,6 +122,13 @@ int apply_relocate_add(Elf_Shdr *sechdrs, unsigned int symindex, unsigned int relsec, struct module *mod); + +/* Adjust arch-specific sections. Return 0 on success. */ +int module_frob_arch_sections(Elf_Ehdr *hdr, + Elf_Shdr *sechdrs, + char *secstrings, + struct module *mod); + #endif /* CONFIG_MODULES */ extern struct list_head module_list; |