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 31 struct 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 47 struct 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 59 struct 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 69 struct 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 79 struct elf *elf_open(const char *name); 80 struct section *find_section_by_name(struct elf *elf, const char *name); 81 struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset); 82 struct symbol *find_symbol_containing(struct section *sec, unsigned long offset); 83 struct rela *find_rela_by_dest(struct section *sec, unsigned long offset); 84 struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset, 85 unsigned int len); 86 struct symbol *find_containing_func(struct section *sec, unsigned long offset); 87 void elf_close(struct elf *elf); 88 89 90 91 #endif /* _OBJTOOL_ELF_H */ 92