1// reloc-types.h -- ELF relocation templates for gold -*- C++ -*- 2 3// Copyright (C) 2006-2017 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 31namespace 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 37template<int sh_type, int size, bool big_endian> 38struct Reloc_types; 39 40template<int size, bool big_endian> 41struct 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 61template<int size, bool big_endian> 62struct 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) 85