gold/freebsd.h

   1 // freebsd.h -- FreeBSD support for gold    -*- C++ -*-
   2
   3 // Copyright 2009, 2011 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     : Target_selector(machine, size, is_big_endian, NULL),
  43       bfd_name_(bfd_name), freebsd_bfd_name_(freebsd_bfd_name)
  44   { }
  45
  46  protected:
  47   // If we see a FreeBSD input file, mark the output file as using
  48   // FreeBSD.
  49   virtual Target*
  50   do_recognize(int, int osabi, int)
  51   {
  52     Target* ret = this->instantiate_target();
  53     if (osabi == elfcpp::ELFOSABI_FREEBSD)
  54       ret->set_osabi(static_cast<elfcpp::ELFOSABI>(osabi));
  55     return ret;
  56   }
  57
  58   // Recognize two names.
  59   virtual Target*
  60   do_recognize_by_name(const char* name)
  61   {
  62     if (strcmp(name, this->bfd_name_) == 0)
  63       return this->instantiate_target();
  64     else if (strcmp(name, this->freebsd_bfd_name_) == 0)
  65       {
  66         Target* ret = this->instantiate_target();
  67         ret->set_osabi(elfcpp::ELFOSABI_FREEBSD);
  68         return ret;
  69       }
  70     else
  71       return NULL;
  72   }
  73
  74   // Print both names in --help output.
  75   virtual void
  76   do_supported_names(std::vector<const char*>* names)
  77   {
  78     names->push_back(this->bfd_name_);
  79     names->push_back(this->freebsd_bfd_name_);
  80   }
  81
  82  private:
  83   // The BFD name for the non-Freebsd target.
  84   const char* bfd_name_;
  85   // The BFD name for the Freebsd target.
  86   const char* freebsd_bfd_name_;
  87 };
  88
  89 } // end namespace gold
  90
  91 #endif // !defined(GOLD_FREEBSD_H)