/*
   * 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>

  #ifdef LIBELF_USE_DEPRECATED
  # define elf_getshdrnum    elf_getshnum
  # define elf_getshdrstrndx elf_getshstrndx
  #endif

  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 */