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