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// ehframe.h -- handle exception frame sections for gold -*- 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_EHFRAME_H
#define GOLD_EHFRAME_H
#include "output.h"
namespace gold
{
// This class manages the .eh_frame_hdr section, which holds the data
// for the PT_GNU_EH_FRAME segment. gcc's unwind support code uses
// the PT_GNU_EH_FRAME segment to find the list of FDEs. This saves
// the time required to register the exception handlers at startup
// time and when a shared object is loaded, and the time required to
// deregister the exception handlers when a shared object is unloaded.
// FIXME: gcc supports using storing a sorted lookup table for the
// FDEs in the PT_GNU_EH_FRAME segment, but we do not yet generate
// that.
class Eh_frame_hdr : public Output_section_data
{
public:
Eh_frame_hdr(Output_section* eh_frame_section);
// Set the final data size.
void
do_set_address(uint64_t address, off_t offset);
// Write the data to the file.
void
do_write(Output_file*);
private:
// The .eh_frame section.
Output_section* eh_frame_section_;
};
} // End namespace gold.
#endif // !defined(GOLD_EHFRAME_H)
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