[mirror_ubuntu-artful-kernel.git] / tools / objtool / elf.h

/*
 * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _OBJTOOL_ELF_H
#define _OBJTOOL_ELF_H

#include <stdio.h>
#include <gelf.h>
#include <linux/list.h>
#include <linux/hashtable.h>

struct section {
	struct list_head list;
	GElf_Shdr sh;
	struct list_head symbol_list;
	DECLARE_HASHTABLE(symbol_hash, 8);
	struct list_head rela_list;
	DECLARE_HASHTABLE(rela_hash, 16);
	struct section *base, *rela;
	struct symbol *sym;
	Elf_Data *elf_data;
	char *name;
	int idx;
	unsigned long data;
	unsigned int len;
};

struct symbol {
	struct list_head list;
	struct hlist_node hash;
	GElf_Sym sym;
	struct section *sec;
	char *name;
	unsigned int idx;
	unsigned char bind, type;
	unsigned long offset;
	unsigned int len;
};

struct rela {
	struct list_head list;
	struct hlist_node hash;
	GElf_Rela rela;
	struct symbol *sym;
	unsigned int type;
	unsigned long offset;
	int addend;
};

struct elf {
	Elf *elf;
	GElf_Ehdr ehdr;
	int fd;
	char *name;
	struct list_head sections;
	DECLARE_HASHTABLE(rela_hash, 16);
};


struct elf *elf_open(const char *name);
struct section *find_section_by_name(struct elf *elf, const char *name);
struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset);
struct rela *find_rela_by_dest(struct section *sec, unsigned long offset);
struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset,
				     unsigned int len);
struct symbol *find_containing_func(struct section *sec, unsigned long offset);
void elf_close(struct elf *elf);


#endif /* _OBJTOOL_ELF_H */
Commit	Line	Data
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 JP	25
	26	struct section {
	27	struct list_head list;
	28	GElf_Shdr sh;
a196e171	29	struct list_head symbol_list;
042ba73f	30	DECLARE_HASHTABLE(symbol_hash, 8);
a196e171	31	struct list_head rela_list;
042ba73f	32	DECLARE_HASHTABLE(rela_hash, 16);
442f04c3 JP	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
	42	struct symbol {
	43	struct list_head list;
042ba73f	44	struct hlist_node hash;
442f04c3 JP	45	GElf_Sym sym;
	46	struct section *sec;
	47	char *name;
042ba73f	48	unsigned int idx;
442f04c3 JP	49	unsigned char bind, type;
	50	unsigned long offset;
	51	unsigned int len;
	52	};
	53
	54	struct rela {
	55	struct list_head list;
042ba73f	56	struct hlist_node hash;
442f04c3 JP	57	GElf_Rela rela;
	58	struct symbol *sym;
	59	unsigned int type;
042ba73f	60	unsigned long offset;
442f04c3 JP	61	int addend;
	62	};
	63
	64	struct elf {
	65	Elf *elf;
	66	GElf_Ehdr ehdr;
	67	int fd;
	68	char *name;
	69	struct list_head sections;
042ba73f	70	DECLARE_HASHTABLE(rela_hash, 16);
442f04c3 JP	71	};
	72
	73
	74	struct elf elf_open(const char name);
	75	struct section find_section_by_name(struct elf elf, const char *name);
	76	struct symbol find_symbol_by_offset(struct section sec, unsigned long offset);
	77	struct rela find_rela_by_dest(struct section sec, unsigned long offset);
	78	struct rela find_rela_by_dest_range(struct section sec, unsigned long offset,
	79	unsigned int len);
	80	struct symbol find_containing_func(struct section sec, unsigned long offset);
	81	void elf_close(struct elf *elf);
	82
	83
	84
	85	#endif /* _OBJTOOL_ELF_H */