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>
24#include <linux/hashtable.h>
25
26#ifdef LIBELF_USE_DEPRECATED
27# define elf_getshdrnum    elf_getshnum
28# define elf_getshdrstrndx elf_getshstrndx
29#endif
30
31struct section {
32	struct list_head list;
33	GElf_Shdr sh;
34	struct list_head symbol_list;
35	DECLARE_HASHTABLE(symbol_hash, 8);
36	struct list_head rela_list;
37	DECLARE_HASHTABLE(rela_hash, 16);
38	struct section *base, *rela;
39	struct symbol *sym;
40	Elf_Data *elf_data;
41	char *name;
42	int idx;
43	unsigned long data;
44	unsigned int len;
45};
46
47struct symbol {
48	struct list_head list;
49	struct hlist_node hash;
50	GElf_Sym sym;
51	struct section *sec;
52	char *name;
53	unsigned int idx;
54	unsigned char bind, type;
55	unsigned long offset;
56	unsigned int len;
57};
58
59struct rela {
60	struct list_head list;
61	struct hlist_node hash;
62	GElf_Rela rela;
63	struct symbol *sym;
64	unsigned int type;
65	unsigned long offset;
66	int addend;
67};
68
69struct elf {
70	Elf *elf;
71	GElf_Ehdr ehdr;
72	int fd;
73	char *name;
74	struct list_head sections;
75	DECLARE_HASHTABLE(rela_hash, 16);
76};
77
78
79struct elf *elf_open(const char *name);
80struct section *find_section_by_name(struct elf *elf, const char *name);
81struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset);
82struct rela *find_rela_by_dest(struct section *sec, unsigned long offset);
83struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset,
84				     unsigned int len);
85struct symbol *find_containing_func(struct section *sec, unsigned long offset);
86void elf_close(struct elf *elf);
87
88
89
90#endif /* _OBJTOOL_ELF_H */