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 struct 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
  42 struct 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
  54 struct 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
  64 struct 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
  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 */