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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. */ | |
be1f221c | 29 | void module_memfree(void *module_region); |
1da177e4 | 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 | { | |
3a611c3c RR |
48 | printk(KERN_ERR "module %s: REL relocation unsupported\n", |
49 | module_name(me)); | |
786d35d4 DH |
50 | return -ENOEXEC; |
51 | } | |
52 | #endif | |
1da177e4 | 53 | |
786d35d4 DH |
54 | /* |
55 | * Apply the given add relocation to the (simplified) ELF. Return | |
56 | * -error or 0 | |
57 | */ | |
58 | #ifdef CONFIG_MODULES_USE_ELF_RELA | |
1da177e4 LT |
59 | int apply_relocate_add(Elf_Shdr *sechdrs, |
60 | const char *strtab, | |
61 | unsigned int symindex, | |
62 | unsigned int relsec, | |
63 | struct module *mod); | |
786d35d4 DH |
64 | #else |
65 | static 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 | { | |
3a611c3c RR |
71 | printk(KERN_ERR "module %s: REL relocation unsupported\n", |
72 | module_name(me)); | |
786d35d4 DH |
73 | return -ENOEXEC; |
74 | } | |
75 | #endif | |
1da177e4 LT |
76 | |
77 | /* Any final processing of module before access. Return -error or 0. */ | |
78 | int module_finalize(const Elf_Ehdr *hdr, | |
79 | const Elf_Shdr *sechdrs, | |
80 | struct module *mod); | |
81 | ||
82 | /* Any cleanup needed when module leaves. */ | |
83 | void module_arch_cleanup(struct module *mod); | |
84 | ||
d453cded RR |
85 | /* Any cleanup before freeing mod->module_init */ |
86 | void module_arch_freeing_init(struct module *mod); | |
d3733e5c AR |
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 | ||
1da177e4 | 95 | #endif |