projects/linux·blob v3.8-rc2 · refs

83 lines · 2.4 KiB

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_free(struct module *mod, 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", me->name);
49 return -ENOEXEC;
50}
51#endif
52
53/*
54 * Apply the given add relocation to the (simplified) ELF. Return
55 * -error or 0
56 */
57#ifdef CONFIG_MODULES_USE_ELF_RELA
58int apply_relocate_add(Elf_Shdr *sechdrs,
59 const char *strtab,
60 unsigned int symindex,
61 unsigned int relsec,
62 struct module *mod);
63#else
64static 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
74
75/* Any final processing of module before access. Return -error or 0. */
76int module_finalize(const Elf_Ehdr *hdr,
77 const Elf_Shdr *sechdrs,
78 struct module *mod);
79
80/* Any cleanup needed when module leaves. */
81void module_arch_cleanup(struct module *mod);
82
83#endif