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 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 */ 14 15/* Adjust arch-specific sections. Return 0 on success. */ 16int module_frob_arch_sections(Elf_Ehdr *hdr, 17 Elf_Shdr *sechdrs, 18 char *secstrings, 19 struct module *mod); 20 21/* Additional bytes needed by arch in front of individual sections */ 22unsigned int arch_mod_section_prepend(struct module *mod, unsigned int section); 23 24/* Allocator used for allocating struct module, core sections and init 25 sections. Returns NULL on failure. */ 26void *module_alloc(unsigned long size); 27 28/* Free memory returned from module_alloc. */ 29void module_memfree(void *module_region); 30 31/* 32 * Apply the given relocation to the (simplified) ELF. Return -error 33 * or 0. 34 */ 35#ifdef CONFIG_MODULES_USE_ELF_REL 36int apply_relocate(Elf_Shdr *sechdrs, 37 const char *strtab, 38 unsigned int symindex, 39 unsigned int relsec, 40 struct module *mod); 41#else 42static 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", 49 module_name(me)); 50 return -ENOEXEC; 51} 52#endif 53 54/* 55 * Apply the given add relocation to the (simplified) ELF. Return 56 * -error or 0 57 */ 58#ifdef CONFIG_MODULES_USE_ELF_RELA 59int apply_relocate_add(Elf_Shdr *sechdrs, 60 const char *strtab, 61 unsigned int symindex, 62 unsigned int relsec, 63 struct module *mod); 64#else 65static inline int apply_relocate_add(Elf_Shdr *sechdrs, 66 const char *strtab, 67 unsigned int symindex, 68 unsigned int relsec, 69 struct module *me) 70{ 71 printk(KERN_ERR "module %s: REL relocation unsupported\n", 72 module_name(me)); 73 return -ENOEXEC; 74} 75#endif 76 77/* Any final processing of module before access. Return -error or 0. */ 78int module_finalize(const Elf_Ehdr *hdr, 79 const Elf_Shdr *sechdrs, 80 struct module *mod); 81 82/* Any cleanup needed when module leaves. */ 83void module_arch_cleanup(struct module *mod); 84 85/* Any cleanup before freeing mod->module_init */ 86void module_arch_freeing_init(struct module *mod); 87 88#ifdef CONFIG_KASAN 89#include <linux/kasan.h> 90#define MODULE_ALIGN (PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT) 91#else 92#define MODULE_ALIGN PAGE_SIZE 93#endif 94 95#endif 96