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442f04c3 JP |
1 | /* |
2 | * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #ifndef _OBJTOOL_ELF_H | |
19 | #define _OBJTOOL_ELF_H | |
20 | ||
21 | #include <stdio.h> | |
22 | #include <gelf.h> | |
23 | #include <linux/list.h> | |
042ba73f | 24 | #include <linux/hashtable.h> |
442f04c3 | 25 | |
2e51f262 JB |
26 | #ifdef LIBELF_USE_DEPRECATED |
27 | # define elf_getshdrnum elf_getshnum | |
28 | # define elf_getshdrstrndx elf_getshstrndx | |
29 | #endif | |
30 | ||
627fce14 JP |
31 | /* |
32 | * Fallback for systems without this "read, mmaping if possible" cmd. | |
33 | */ | |
34 | #ifndef ELF_C_READ_MMAP | |
35 | #define ELF_C_READ_MMAP ELF_C_READ | |
36 | #endif | |
37 | ||
442f04c3 JP |
38 | struct section { |
39 | struct list_head list; | |
40 | GElf_Shdr sh; | |
a196e171 | 41 | struct list_head symbol_list; |
042ba73f | 42 | DECLARE_HASHTABLE(symbol_hash, 8); |
a196e171 | 43 | struct list_head rela_list; |
042ba73f | 44 | DECLARE_HASHTABLE(rela_hash, 16); |
442f04c3 JP |
45 | struct section *base, *rela; |
46 | struct symbol *sym; | |
baa41469 | 47 | Elf_Data *data; |
442f04c3 JP |
48 | char *name; |
49 | int idx; | |
442f04c3 | 50 | unsigned int len; |
627fce14 | 51 | bool changed, text; |
442f04c3 JP |
52 | }; |
53 | ||
54 | struct symbol { | |
55 | struct list_head list; | |
042ba73f | 56 | struct hlist_node hash; |
442f04c3 JP |
57 | GElf_Sym sym; |
58 | struct section *sec; | |
59 | char *name; | |
042ba73f | 60 | unsigned int idx; |
442f04c3 JP |
61 | unsigned char bind, type; |
62 | unsigned long offset; | |
63 | unsigned int len; | |
13810435 | 64 | struct symbol *pfunc, *cfunc; |
442f04c3 JP |
65 | }; |
66 | ||
67 | struct rela { | |
68 | struct list_head list; | |
042ba73f | 69 | struct hlist_node hash; |
442f04c3 JP |
70 | GElf_Rela rela; |
71 | struct symbol *sym; | |
72 | unsigned int type; | |
042ba73f | 73 | unsigned long offset; |
442f04c3 JP |
74 | int addend; |
75 | }; | |
76 | ||
77 | struct elf { | |
78 | Elf *elf; | |
79 | GElf_Ehdr ehdr; | |
80 | int fd; | |
81 | char *name; | |
82 | struct list_head sections; | |
042ba73f | 83 | DECLARE_HASHTABLE(rela_hash, 16); |
442f04c3 JP |
84 | }; |
85 | ||
86 | ||
627fce14 | 87 | struct elf *elf_open(const char *name, int flags); |
442f04c3 JP |
88 | struct section *find_section_by_name(struct elf *elf, const char *name); |
89 | struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset); | |
13810435 | 90 | struct symbol *find_symbol_by_name(struct elf *elf, const char *name); |
5c51f4ae | 91 | struct symbol *find_symbol_containing(struct section *sec, unsigned long offset); |
442f04c3 JP |
92 | struct rela *find_rela_by_dest(struct section *sec, unsigned long offset); |
93 | struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset, | |
94 | unsigned int len); | |
95 | struct symbol *find_containing_func(struct section *sec, unsigned long offset); | |
627fce14 JP |
96 | struct section *elf_create_section(struct elf *elf, const char *name, size_t |
97 | entsize, int nr); | |
98 | struct section *elf_create_rela_section(struct elf *elf, struct section *base); | |
99 | int elf_rebuild_rela_section(struct section *sec); | |
100 | int elf_write(struct elf *elf); | |
442f04c3 JP |
101 | void elf_close(struct elf *elf); |
102 | ||
baa41469 JP |
103 | #define for_each_sec(file, sec) \ |
104 | list_for_each_entry(sec, &file->elf->sections, list) | |
442f04c3 JP |
105 | |
106 | #endif /* _OBJTOOL_ELF_H */ |