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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_MODULELOADER_H |
3 | #define _LINUX_MODULELOADER_H | |
4 | /* The stuff needed for archs to support modules. */ | |
5 | ||
6 | #include <linux/module.h> | |
7 | #include <linux/elf.h> | |
8 | ||
74e08fcf JB |
9 | /* These may be implemented by architectures that need to hook into the |
10 | * module loader code. Architectures that don't need to do anything special | |
11 | * can just rely on the 'weak' default hooks defined in kernel/module.c. | |
12 | * Note, however, that at least one of apply_relocate or apply_relocate_add | |
13 | * must be implemented by each architecture. | |
14 | */ | |
1da177e4 LT |
15 | |
16 | /* Adjust arch-specific sections. Return 0 on success. */ | |
17 | int module_frob_arch_sections(Elf_Ehdr *hdr, | |
18 | Elf_Shdr *sechdrs, | |
19 | char *secstrings, | |
20 | struct module *mod); | |
21 | ||
088af9a6 HD |
22 | /* Additional bytes needed by arch in front of individual sections */ |
23 | unsigned int arch_mod_section_prepend(struct module *mod, unsigned int section); | |
24 | ||
1da177e4 LT |
25 | /* Allocator used for allocating struct module, core sections and init |
26 | sections. Returns NULL on failure. */ | |
27 | void *module_alloc(unsigned long size); | |
28 | ||
29 | /* Free memory returned from module_alloc. */ | |
be1f221c | 30 | void module_memfree(void *module_region); |
1da177e4 | 31 | |
786d35d4 DH |
32 | /* |
33 | * Apply the given relocation to the (simplified) ELF. Return -error | |
34 | * or 0. | |
35 | */ | |
36 | #ifdef CONFIG_MODULES_USE_ELF_REL | |
1da177e4 LT |
37 | int apply_relocate(Elf_Shdr *sechdrs, |
38 | const char *strtab, | |
39 | unsigned int symindex, | |
40 | unsigned int relsec, | |
41 | struct module *mod); | |
786d35d4 DH |
42 | #else |
43 | static inline int apply_relocate(Elf_Shdr *sechdrs, | |
44 | const char *strtab, | |
45 | unsigned int symindex, | |
46 | unsigned int relsec, | |
47 | struct module *me) | |
48 | { | |
3a611c3c RR |
49 | printk(KERN_ERR "module %s: REL relocation unsupported\n", |
50 | module_name(me)); | |
786d35d4 DH |
51 | return -ENOEXEC; |
52 | } | |
53 | #endif | |
1da177e4 | 54 | |
786d35d4 DH |
55 | /* |
56 | * Apply the given add relocation to the (simplified) ELF. Return | |
57 | * -error or 0 | |
58 | */ | |
59 | #ifdef CONFIG_MODULES_USE_ELF_RELA | |
1da177e4 LT |
60 | int apply_relocate_add(Elf_Shdr *sechdrs, |
61 | const char *strtab, | |
62 | unsigned int symindex, | |
63 | unsigned int relsec, | |
64 | struct module *mod); | |
786d35d4 DH |
65 | #else |
66 | static inline int apply_relocate_add(Elf_Shdr *sechdrs, | |
67 | const char *strtab, | |
68 | unsigned int symindex, | |
69 | unsigned int relsec, | |
70 | struct module *me) | |
71 | { | |
3a611c3c RR |
72 | printk(KERN_ERR "module %s: REL relocation unsupported\n", |
73 | module_name(me)); | |
786d35d4 DH |
74 | return -ENOEXEC; |
75 | } | |
76 | #endif | |
1da177e4 LT |
77 | |
78 | /* Any final processing of module before access. Return -error or 0. */ | |
79 | int module_finalize(const Elf_Ehdr *hdr, | |
80 | const Elf_Shdr *sechdrs, | |
81 | struct module *mod); | |
82 | ||
83 | /* Any cleanup needed when module leaves. */ | |
84 | void module_arch_cleanup(struct module *mod); | |
85 | ||
d453cded RR |
86 | /* Any cleanup before freeing mod->module_init */ |
87 | void module_arch_freeing_init(struct module *mod); | |
d3733e5c AR |
88 | |
89 | #ifdef CONFIG_KASAN | |
90 | #include <linux/kasan.h> | |
91 | #define MODULE_ALIGN (PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT) | |
92 | #else | |
93 | #define MODULE_ALIGN PAGE_SIZE | |
94 | #endif | |
95 | ||
1da177e4 | 96 | #endif |