1 // freebsd.h -- FreeBSD support for gold    -*- C++ -*-
2 
3 // Copyright (C) 2009-2020 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 
29 namespace 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 
36 class 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