LXR linux/tools/objtool/elf.h

   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 symbol *find_symbol_containing(struct section *sec, unsigned long offset);
  83struct rela *find_rela_by_dest(struct section *sec, unsigned long offset);
  84struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset,
  85                                     unsigned int len);
  86struct symbol *find_containing_func(struct section *sec, unsigned long offset);
  87void elf_close(struct elf *elf);
  88
  89
  90
  91#endif /* _OBJTOOL_ELF_H */
  92