[mirror_ubuntu-artful-kernel.git] / include / linux / moduleloader.h

#ifndef _LINUX_MODULELOADER_H
#define _LINUX_MODULELOADER_H
/* The stuff needed for archs to support modules. */

#include <linux/module.h>
#include <linux/elf.h>

/* These may be implemented by architectures that need to hook into the
 * module loader code.  Architectures that don't need to do anything special
 * can just rely on the 'weak' default hooks defined in kernel/module.c.
 * Note, however, that at least one of apply_relocate or apply_relocate_add
 * must be implemented by each architecture.
 */

/* Adjust arch-specific sections.  Return 0 on success.  */
int module_frob_arch_sections(Elf_Ehdr *hdr,
			      Elf_Shdr *sechdrs,
			      char *secstrings,
			      struct module *mod);

/* Additional bytes needed by arch in front of individual sections */
unsigned int arch_mod_section_prepend(struct module *mod, unsigned int section);

/* Allocator used for allocating struct module, core sections and init
   sections.  Returns NULL on failure. */
void *module_alloc(unsigned long size);

/* Free memory returned from module_alloc. */
void module_free(struct module *mod, void *module_region);

/*
 * Apply the given relocation to the (simplified) ELF.  Return -error
 * or 0.
 */
#ifdef CONFIG_MODULES_USE_ELF_REL
int apply_relocate(Elf_Shdr *sechdrs,
		   const char *strtab,
		   unsigned int symindex,
		   unsigned int relsec,
		   struct module *mod);
#else
static inline int apply_relocate(Elf_Shdr *sechdrs,
				 const char *strtab,
				 unsigned int symindex,
				 unsigned int relsec,
				 struct module *me)
{
	printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name);
	return -ENOEXEC;
}
#endif

/*
 * Apply the given add relocation to the (simplified) ELF.  Return
 * -error or 0
 */
#ifdef CONFIG_MODULES_USE_ELF_RELA
int apply_relocate_add(Elf_Shdr *sechdrs,
		       const char *strtab,
		       unsigned int symindex,
		       unsigned int relsec,
		       struct module *mod);
#else
static inline int apply_relocate_add(Elf_Shdr *sechdrs,
				     const char *strtab,
				     unsigned int symindex,
				     unsigned int relsec,
				     struct module *me)
{
	printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name);
	return -ENOEXEC;
}
#endif

/* Any final processing of module before access.  Return -error or 0. */
int module_finalize(const Elf_Ehdr *hdr,
		    const Elf_Shdr *sechdrs,
		    struct module *mod);

/* Any cleanup needed when module leaves. */
void module_arch_cleanup(struct module *mod);

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_MODULELOADER_H
	2	#define _LINUX_MODULELOADER_H
	3	/* The stuff needed for archs to support modules. */
	4
	5	#include <linux/module.h>
	6	#include <linux/elf.h>
	7
74e08fcf JB	8	/* These may be implemented by architectures that need to hook into the
	9	* module loader code. Architectures that don't need to do anything special
	10	* can just rely on the 'weak' default hooks defined in kernel/module.c.
	11	* Note, however, that at least one of apply_relocate or apply_relocate_add
	12	* must be implemented by each architecture.
	13	*/
1da177e4 LT	14
	15	/* Adjust arch-specific sections. Return 0 on success. */
	16	int module_frob_arch_sections(Elf_Ehdr *hdr,
	17	Elf_Shdr *sechdrs,
	18	char *secstrings,
	19	struct module *mod);
	20
088af9a6 HD	21	/* Additional bytes needed by arch in front of individual sections */
	22	unsigned int arch_mod_section_prepend(struct module *mod, unsigned int section);
	23
1da177e4 LT	24	/* Allocator used for allocating struct module, core sections and init
	25	sections. Returns NULL on failure. */
	26	void *module_alloc(unsigned long size);
	27
	28	/* Free memory returned from module_alloc. */
	29	void module_free(struct module mod, void module_region);
	30
786d35d4 DH	31	/*
	32	* Apply the given relocation to the (simplified) ELF. Return -error
	33	* or 0.
	34	*/
	35	#ifdef CONFIG_MODULES_USE_ELF_REL
1da177e4 LT	36	int apply_relocate(Elf_Shdr *sechdrs,
	37	const char *strtab,
	38	unsigned int symindex,
	39	unsigned int relsec,
	40	struct module *mod);
786d35d4 DH	41	#else
	42	static inline int apply_relocate(Elf_Shdr *sechdrs,
	43	const char *strtab,
	44	unsigned int symindex,
	45	unsigned int relsec,
	46	struct module *me)
	47	{
	48	printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name);
	49	return -ENOEXEC;
	50	}
	51	#endif
1da177e4	52
786d35d4 DH	53	/*
	54	* Apply the given add relocation to the (simplified) ELF. Return
	55	* -error or 0
	56	*/
	57	#ifdef CONFIG_MODULES_USE_ELF_RELA
1da177e4 LT	58	int apply_relocate_add(Elf_Shdr *sechdrs,
	59	const char *strtab,
	60	unsigned int symindex,
	61	unsigned int relsec,
	62	struct module *mod);
786d35d4 DH	63	#else
	64	static inline int apply_relocate_add(Elf_Shdr *sechdrs,
	65	const char *strtab,
	66	unsigned int symindex,
	67	unsigned int relsec,
	68	struct module *me)
	69	{
	70	printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name);
	71	return -ENOEXEC;
	72	}
	73	#endif
1da177e4 LT	74
	75	/* Any final processing of module before access. Return -error or 0. */
	76	int module_finalize(const Elf_Ehdr *hdr,
	77	const Elf_Shdr *sechdrs,
	78	struct module *mod);
	79
	80	/* Any cleanup needed when module leaves. */
	81	void module_arch_cleanup(struct module *mod);
	82
	83	#endif