1 // tls.h -- Thread-Local Storage utility routines for gold -*- C++ -*- 2 3 // Copyright (C) 2006-2016 Free Software Foundation, Inc. 4 // Written by Ian Lance Taylor <iant (at) 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 #ifndef GOLD_TLS_H 24 #define GOLD_TLS_H 25 26 #include "elfcpp.h" 27 #include "reloc.h" 28 29 namespace gold 30 { 31 32 namespace tls 33 { 34 35 // This is used for relocations that can be converted to a different, 36 // more efficient type of relocation. 37 38 enum Tls_optimization 39 { 40 TLSOPT_NONE, // Can not convert this relocation to a more efficient one. 41 TLSOPT_TO_LD, // Can convert General Dynamic to Local Dynamic. 42 TLSOPT_TO_LE, // Can convert GD or LD to Local-Exec. 43 TLSOPT_TO_IE, // Can convert GD or LD or LE to Initial-Exec. 44 }; 45 46 // Check the range for a TLS relocation. This is inlined for efficiency. 47 48 template<int size, bool big_endian> 49 inline void 50 check_range(const Relocate_info<size, big_endian>* relinfo, 51 size_t relnum, 52 typename elfcpp::Elf_types<size>::Elf_Addr rel_offset, 53 section_size_type view_size, int off) 54 { 55 typename elfcpp::Elf_types<size>::Elf_Addr offset = rel_offset + off; 56 // Elf_Addr is unsigned, so this also tests for signed offset < 0. 57 if (offset > view_size) 58 gold_error_at_location(relinfo, relnum, rel_offset, 59 _("TLS relocation out of range")); 60 } 61 62 // Check the validity of a TLS relocation. This is like assert. 63 64 template<int size, bool big_endian> 65 inline void 66 check_tls(const Relocate_info<size, big_endian>* relinfo, 67 size_t relnum, 68 typename elfcpp::Elf_types<size>::Elf_Addr rel_offset, 69 bool valid) 70 { 71 if (!valid) 72 gold_error_at_location(relinfo, relnum, rel_offset, 73 _("TLS relocation against invalid instruction")); 74 } 75 76 77 } // End namespace tls. 78 79 } // End namespace gold. 80 81 #endif // !defined(GOLD_TLS_H) 82
