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1 | // reloc-types.h -- ELF relocation templates for gold -*- C++ -*- | |
2 | ||
3 | // Copyright (C) 2006-2019 Free Software Foundation, Inc. | |
4 | // Written by Ian Lance Taylor <iant@google.com>. | |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
23 | // This header files defines a few convenient templated types for use | |
24 | // when handling ELF relocations. | |
25 | ||
26 | #ifndef GOLD_RELOC_TYPES_H | |
27 | #define GOLD_RELOC_TYPES_H | |
28 | ||
29 | #include "elfcpp.h" | |
30 | ||
31 | namespace gold | |
32 | { | |
33 | ||
34 | // Pick the ELF relocation accessor class and the size based on | |
35 | // SH_TYPE, which is either elfcpp::SHT_REL or elfcpp::SHT_RELA. | |
36 | ||
37 | template<int sh_type, int size, bool big_endian> | |
38 | struct Reloc_types; | |
39 | ||
40 | template<int size, bool big_endian> | |
41 | struct Reloc_types<elfcpp::SHT_REL, size, big_endian> | |
42 | { | |
43 | typedef typename elfcpp::Rel<size, big_endian> Reloc; | |
44 | typedef typename elfcpp::Rel_write<size, big_endian> Reloc_write; | |
45 | static const int reloc_size = elfcpp::Elf_sizes<size>::rel_size; | |
46 | ||
47 | static inline typename elfcpp::Elf_types<size>::Elf_Swxword | |
48 | get_reloc_addend(const Reloc*) | |
49 | { gold_unreachable(); } | |
50 | ||
51 | static inline typename elfcpp::Elf_types<size>::Elf_Swxword | |
52 | get_reloc_addend_noerror(const Reloc*) | |
53 | { return 0; } | |
54 | ||
55 | static inline void | |
56 | set_reloc_addend(Reloc_write*, | |
57 | typename elfcpp::Elf_types<size>::Elf_Swxword) | |
58 | { gold_unreachable(); } | |
59 | }; | |
60 | ||
61 | template<int size, bool big_endian> | |
62 | struct Reloc_types<elfcpp::SHT_RELA, size, big_endian> | |
63 | { | |
64 | typedef typename elfcpp::Rela<size, big_endian> Reloc; | |
65 | typedef typename elfcpp::Rela_write<size, big_endian> Reloc_write; | |
66 | static const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
67 | ||
68 | static inline typename elfcpp::Elf_types<size>::Elf_Swxword | |
69 | get_reloc_addend(const Reloc* p) | |
70 | { return p->get_r_addend(); } | |
71 | ||
72 | static inline typename elfcpp::Elf_types<size>::Elf_Swxword | |
73 | get_reloc_addend_noerror(const Reloc* p) | |
74 | { return p->get_r_addend(); } | |
75 | ||
76 | static inline void | |
77 | set_reloc_addend(Reloc_write* p, | |
78 | typename elfcpp::Elf_types<size>::Elf_Swxword val) | |
79 | { p->put_r_addend(val); } | |
80 | }; | |
81 | ||
82 | }; // End namespace gold. | |
83 | ||
84 | #endif // !defined(GOLD_RELOC_TYPE_SH) |