90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
// target-select.h -- select a target for an object file -*- C++ -*-
|
|
|
|
// Copyright 2006, 2007 Free Software Foundation, Inc.
|
|
// Written by Ian Lance Taylor <iant@google.com>.
|
|
|
|
// This file is part of gold.
|
|
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
|
|
// MA 02110-1301, USA.
|
|
|
|
#ifndef GOLD_TARGET_SELECT_H
|
|
#define GOLD_TARGET_SELECT_H
|
|
|
|
namespace gold
|
|
{
|
|
|
|
class Target;
|
|
|
|
// We want to avoid a master list of targets, which implies using a
|
|
// global constructor. And we also want the program to start up as
|
|
// quickly as possible, which implies avoiding global constructors.
|
|
// We compromise on a very simple global constructor. We use a target
|
|
// selector, which specifies an ELF machine number and a recognition
|
|
// function. We use global constructors to build a linked list of
|
|
// target selectors--a simple pointer list, not a std::list.
|
|
|
|
class Target_selector
|
|
{
|
|
public:
|
|
// Create a target selector for a specific machine number, size (32
|
|
// or 64), and endianness. The machine number can be EM_NONE to
|
|
// test for any machine number.
|
|
Target_selector(int machine, int size, bool is_big_endian);
|
|
|
|
virtual ~Target_selector()
|
|
{ }
|
|
|
|
// If we can handle this target, return a pointer to a target
|
|
// structure. The size and endianness are known.
|
|
virtual Target* recognize(int machine, int osabi, int abiversion) = 0;
|
|
|
|
// Return the next Target_selector in the linked list.
|
|
Target_selector*
|
|
next() const
|
|
{ return this->next_; }
|
|
|
|
// Return the machine number this selector is looking for, which can
|
|
// be EM_NONE to match any machine number.
|
|
int
|
|
machine() const
|
|
{ return this->machine_; }
|
|
|
|
// Return the size this is looking for (32 or 64).
|
|
int
|
|
get_size() const
|
|
{ return this->size_; }
|
|
|
|
// Return the endianness this is looking for.
|
|
bool
|
|
is_big_endian() const
|
|
{ return this->is_big_endian_; }
|
|
|
|
private:
|
|
int machine_;
|
|
int size_;
|
|
bool is_big_endian_;
|
|
Target_selector* next_;
|
|
};
|
|
|
|
// Select the target for an ELF file.
|
|
|
|
extern Target* select_target(int machine, int size, bool big_endian,
|
|
int osabi, int abiversion);
|
|
|
|
} // End namespace gold.
|
|
|
|
#endif // !defined(GOLD_TARGET_SELECT_H)
|