From Craig Silverstein: add tls.h, use it in i386.cc.
[deliverable/binutils-gdb.git] / gold / tls.h
1 // tls.h -- Thread-Local Storage utility routines for gold -*- C++ -*-
2
3 // Copyright 2006, 2007 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 off_t view_size, off_t off)
54 {
55 off_t offset = rel_offset + off;
56 if (offset < 0 || offset > view_size)
57 {
58 fprintf(stderr, _("%s: %s: TLS relocation out of range\n"),
59 program_name,
60 relinfo->location(relnum, rel_offset).c_str());
61 gold_exit(false);
62 }
63 }
64
65 // Check the validity of a TLS relocation. This is like assert.
66
67 template<int size, bool big_endian>
68 inline void
69 check_tls(const Relocate_info<size, big_endian>* relinfo,
70 size_t relnum,
71 typename elfcpp::Elf_types<size>::Elf_Addr rel_offset,
72 bool valid)
73 {
74 if (!valid)
75 {
76 fprintf(stderr,
77 _("%s: %s: TLS relocation against invalid instruction\n"),
78 program_name,
79 relinfo->location(relnum, rel_offset).c_str());
80 gold_exit(false);
81 }
82 }
83
84
85 } // End namespace tls.
86
87 } // End namespace gold.
88
89 #endif // !defined(GOLD_TLS_H)
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