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                           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(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)