86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
// compressed_output.h -- compressed output sections for gold -*- C++ -*-
|
|
|
|
// Copyright (C) 2007-2016 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.
|
|
|
|
// We support compressing .debug_* sections on output. (And,
|
|
// potentially one day, other sections.) This is a form of
|
|
// relaxation. This file adds support for merging and emitting the
|
|
// compressed sections.
|
|
|
|
#ifndef GOLD_COMPRESSED_OUTPUT_H
|
|
#define GOLD_COMPRESSED_OUTPUT_H
|
|
|
|
#include <string>
|
|
|
|
#include "output.h"
|
|
|
|
namespace gold
|
|
{
|
|
|
|
class General_options;
|
|
|
|
// Read the compression header of a compressed debug section and return
|
|
// the uncompressed size.
|
|
|
|
extern uint64_t
|
|
get_uncompressed_size(const unsigned char*, section_size_type);
|
|
|
|
// Decompress a compressed debug section directly into the output file.
|
|
|
|
extern bool
|
|
decompress_input_section(const unsigned char*, unsigned long, unsigned char*,
|
|
unsigned long, int, bool, elfcpp::Elf_Xword);
|
|
|
|
// This is used for a section whose data should be compressed. It is
|
|
// a regular Output_section which computes its contents into a buffer
|
|
// and then postprocesses it.
|
|
|
|
class Output_compressed_section : public Output_section
|
|
{
|
|
public:
|
|
Output_compressed_section(const General_options* options,
|
|
const char* name, elfcpp::Elf_Word flags,
|
|
elfcpp::Elf_Xword type)
|
|
: Output_section(name, flags, type),
|
|
options_(options)
|
|
{ this->set_requires_postprocessing(); }
|
|
|
|
protected:
|
|
// Set the final data size.
|
|
void
|
|
set_final_data_size();
|
|
|
|
// Write out the compressed contents.
|
|
void
|
|
do_write(Output_file*);
|
|
|
|
private:
|
|
// The options--this includes the compression type.
|
|
const General_options* options_;
|
|
// The compressed data.
|
|
unsigned char* data_;
|
|
// The new section name if we do compress.
|
|
std::string new_section_name_;
|
|
};
|
|
|
|
} // End namespace gold.
|
|
|
|
#endif // !defined(GOLD_COMPRESSED_OUTPUT_H)
|