| 1 | // reloc-types.h -- ELF relocation templates for gold -*- C++ -*- |
| 2 | |
| 3 | // Copyright (C) 2006-2014 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 | static inline void |
| 61 | copy_reloc_addend(Reloc_write*, const Reloc*) |
| 62 | { gold_unreachable(); } |
| 63 | }; |
| 64 | |
| 65 | template<int size, bool big_endian> |
| 66 | struct Reloc_types<elfcpp::SHT_RELA, size, big_endian> |
| 67 | { |
| 68 | typedef typename elfcpp::Rela<size, big_endian> Reloc; |
| 69 | typedef typename elfcpp::Rela_write<size, big_endian> Reloc_write; |
| 70 | static const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 71 | |
| 72 | static inline typename elfcpp::Elf_types<size>::Elf_Swxword |
| 73 | get_reloc_addend(const Reloc* p) |
| 74 | { return p->get_r_addend(); } |
| 75 | |
| 76 | static inline typename elfcpp::Elf_types<size>::Elf_Swxword |
| 77 | get_reloc_addend_noerror(const Reloc* p) |
| 78 | { return p->get_r_addend(); } |
| 79 | |
| 80 | static inline void |
| 81 | set_reloc_addend(Reloc_write* p, |
| 82 | typename elfcpp::Elf_types<size>::Elf_Swxword val) |
| 83 | { p->put_r_addend(val); } |
| 84 | |
| 85 | static inline void |
| 86 | copy_reloc_addend(Reloc_write* to, const Reloc* from) |
| 87 | { to->put_r_addend(from->get_r_addend()); } |
| 88 | }; |
| 89 | |
| 90 | }; // End namespace gold. |
| 91 | |
| 92 | #endif // !defined(GOLD_RELOC_TYPE_SH) |