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86 lines
2.5 KiB
86 lines
2.5 KiB
// compressed_output.h -- compressed output sections for gold -*- C++ -*- |
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// Copyright (C) 2007-2014 Free Software Foundation, Inc. |
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// Written by Ian Lance Taylor <iant@google.com>. |
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// This file is part of gold. |
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// This program is free software; you can redistribute it and/or modify |
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// it under the terms of the GNU General Public License as published by |
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// the Free Software Foundation; either version 3 of the License, or |
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// (at your option) any later version. |
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// This program is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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// You should have received a copy of the GNU General Public License |
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// along with this program; if not, write to the Free Software |
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// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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// MA 02110-1301, USA. |
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// We support compressing .debug_* sections on output. (And, |
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// potentially one day, other sections.) This is a form of |
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// relaxation. This file adds support for merging and emitting the |
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// compressed sections. |
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#ifndef GOLD_COMPRESSED_OUTPUT_H |
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#define GOLD_COMPRESSED_OUTPUT_H |
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#include <string> |
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#include "output.h" |
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namespace gold |
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{ |
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class General_options; |
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// Read the compression header of a compressed debug section and return |
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// the uncompressed size. |
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extern uint64_t |
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get_uncompressed_size(const unsigned char*, section_size_type); |
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// Decompress a compressed debug section directly into the output file. |
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extern bool |
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decompress_input_section(const unsigned char*, unsigned long, unsigned char*, |
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unsigned long); |
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// This is used for a section whose data should be compressed. It is |
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// a regular Output_section which computes its contents into a buffer |
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// and then postprocesses it. |
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class Output_compressed_section : public Output_section |
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{ |
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public: |
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Output_compressed_section(const General_options* options, |
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const char* name, elfcpp::Elf_Word flags, |
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elfcpp::Elf_Xword type) |
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: Output_section(name, flags, type), |
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options_(options) |
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{ this->set_requires_postprocessing(); } |
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protected: |
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// Set the final data size. |
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void |
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set_final_data_size(); |
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// Write out the compressed contents. |
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void |
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do_write(Output_file*); |
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private: |
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// The options--this includes the compression type. |
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const General_options* options_; |
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// The compressed data. |
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unsigned char* data_; |
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// The new section name if we do compress. |
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std::string new_section_name_; |
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}; |
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} // End namespace gold. |
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#endif // !defined(GOLD_COMPRESSED_OUTPUT_H)
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