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
  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 */
  86