1// freebsd.h -- FreeBSD support for gold    -*- C++ -*-
2
3// Copyright (C) 2009-2017 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#include "target.h"
24#include "target-select.h"
25
26#ifndef GOLD_FREEBSD_H
27#define GOLD_FREEBSD_H
28
29namespace gold
30{
31
32// FreeBSD 4.1 and later wants the EI_OSABI field in the ELF header to
33// be set to ELFOSABI_FREEBSD.  This is a target selector for targets
34// which permit combining both FreeBSD and non-FreeBSD object files.
35
36class Target_selector_freebsd : public Target_selector
37{
38 public:
39  Target_selector_freebsd(int machine, int size, bool is_big_endian,
40			  const char* bfd_name,
41			  const char* freebsd_bfd_name,
42			  const char* emulation)
43    : Target_selector(machine, size, is_big_endian, NULL, emulation),
44      bfd_name_(bfd_name), freebsd_bfd_name_(freebsd_bfd_name)
45  { }
46
47 protected:
48  // If we see a FreeBSD input file, mark the output file as using
49  // FreeBSD.
50  virtual Target*
51  do_recognize(Input_file*, off_t, int, int osabi, int)
52  {
53    Target* ret = this->instantiate_target();
54    if (osabi == elfcpp::ELFOSABI_FREEBSD)
55      ret->set_osabi(static_cast<elfcpp::ELFOSABI>(osabi));
56    return ret;
57  }
58
59  // Recognize two names.
60  virtual Target*
61  do_recognize_by_bfd_name(const char* name)
62  {
63    if (strcmp(name, this->bfd_name_) == 0)
64      return this->instantiate_target();
65    else if (strcmp(name, this->freebsd_bfd_name_) == 0)
66      {
67	Target* ret = this->instantiate_target();
68	ret->set_osabi(elfcpp::ELFOSABI_FREEBSD);
69	return ret;
70      }
71    else
72      return NULL;
73  }
74
75  // Print both names in --help output.
76  virtual void
77  do_supported_bfd_names(std::vector<const char*>* names)
78  {
79    names->push_back(this->bfd_name_);
80    names->push_back(this->freebsd_bfd_name_);
81  }
82
83  // Return appropriate BFD name.
84  virtual const char*
85  do_target_bfd_name(const Target* target)
86  {
87    if (!this->is_our_target(target))
88      return NULL;
89    return (target->osabi() == elfcpp::ELFOSABI_FREEBSD
90	    ? this->freebsd_bfd_name_
91	    : this->bfd_name_);
92  }
93
94 private:
95  // The BFD name for the non-Freebsd target.
96  const char* bfd_name_;
97  // The BFD name for the Freebsd target.
98  const char* freebsd_bfd_name_;
99};
100
101} // end namespace gold
102
103#endif // !defined(GOLD_FREEBSD_H)
104