| /* SPDX-License-Identifier: GPL-2.0 */ |
| #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_memfree(void *module_region); |
| |
| /* Determines if the section name is an init section (that is only used during |
| * module loading). |
| */ |
| bool module_init_section(const char *name); |
| |
| /* Determines if the section name is an exit section (that is only used during |
| * module unloading) |
| */ |
| bool module_exit_section(const char *name); |
| |
| /* |
| * 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", |
| module_name(me)); |
| 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", |
| module_name(me)); |
| 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); |
| |
| /* Any cleanup before freeing mod->module_init */ |
| void module_arch_freeing_init(struct module *mod); |
| |
| #if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \ |
| !defined(CONFIG_KASAN_VMALLOC) |
| #include <linux/kasan.h> |
| #define MODULE_ALIGN (PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT) |
| #else |
| #define MODULE_ALIGN PAGE_SIZE |
| #endif |
| |
| #endif |