| 1 | |
| 2 | * Copyright (C) 2015 Josh Poimboeuf <[email protected]>
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| 3 | *
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| 4 | * This program is free software; you can redistribute it and/or
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| 5 | * modify it under the terms of the GNU General Public License
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| 6 | * as published by the Free Software Foundation; either version 2
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| 7 | * of the License, or (at your option) any later version.
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| 8 | *
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| 9 | * This program is distributed in the hope that it will be useful,
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | * GNU General Public License for more details.
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| 13 | *
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| 14 | * You should have received a copy of the GNU General Public License
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| 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>.
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| 16 |
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| 17 |
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| 18 | #ifndef _OBJTOOL_ELF_H
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| 19 | #define _OBJTOOL_ELF_H
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| 20 |
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| 21 | #include <stdio.h>
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| 22 | #include <gelf.h>
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| 23 | #include <linux/list.h>
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| 24 | #include <linux/hashtable.h>
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| 25 |
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| 26 | #ifdef LIBELF_USE_DEPRECATED
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| 27 | # define elf_getshdrnum elf_getshnum
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| 28 | # define elf_getshdrstrndx elf_getshstrndx
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| 29 | #endif
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| 30 |
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| 31 | struct section {
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| 32 | struct list_head list;
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| 33 | GElf_Shdr sh;
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| 34 | struct list_head symbol_list;
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| 35 | DECLARE_HASHTABLE(symbol_hash, 8);
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| 36 | struct list_head rela_list;
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| 37 | DECLARE_HASHTABLE(rela_hash, 16);
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| 38 | struct section *base, *rela;
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| 39 | struct symbol *sym;
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| 40 | Elf_Data *data;
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| 41 | char *name;
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| 42 | int idx;
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| 43 | unsigned int len;
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| 44 | };
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| 45 |
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| 46 | struct symbol {
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| 47 | struct list_head list;
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| 48 | struct hlist_node hash;
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| 49 | GElf_Sym sym;
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| 50 | struct section *sec;
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| 51 | char *name;
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| 52 | unsigned int idx;
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| 53 | unsigned char bind, type;
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| 54 | unsigned long offset;
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| 55 | unsigned int len;
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| 56 | };
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| 57 |
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| 58 | struct rela {
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| 59 | struct list_head list;
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| 60 | struct hlist_node hash;
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| 61 | GElf_Rela rela;
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| 62 | struct symbol *sym;
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| 63 | unsigned int type;
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| 64 | unsigned long offset;
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| 65 | int addend;
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| 66 | };
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| 67 |
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| 68 | struct elf {
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| 69 | Elf *elf;
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| 70 | GElf_Ehdr ehdr;
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| 71 | int fd;
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| 72 | char *name;
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| 73 | struct list_head sections;
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| 74 | DECLARE_HASHTABLE(rela_hash, 16);
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| 75 | };
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| 76 |
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| 77 |
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| 78 | struct elf *elf_open(const char *name);
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| 79 | struct section *find_section_by_name(struct elf *elf, const char *name);
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| 80 | struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset);
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| 81 | struct symbol *find_symbol_containing(struct section *sec, unsigned long offset);
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| 82 | struct rela *find_rela_by_dest(struct section *sec, unsigned long offset);
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| 83 | struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset,
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| 84 | unsigned int len);
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| 85 | struct symbol *find_containing_func(struct section *sec, unsigned long offset);
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| 86 | void elf_close(struct elf *elf);
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| 87 |
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| 88 | #define for_each_sec(file, sec) \
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| 89 | list_for_each_entry(sec, &file->elf->sections, list)
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| 90 |
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| 91 | #endif
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