| 1 | // tls.h -- Thread-Local Storage utility routines for gold -*- C++ -*- |
| 2 | |
| 3 | // Copyright 2006, 2007, 2008 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 | #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) |