146 lines
4.0 KiB
C++
146 lines
4.0 KiB
C++
// inremental.cc -- incremental linking support for gold
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// Copyright 2009 Free Software Foundation, Inc.
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// Written by Mikolaj Zalewski <mikolajz@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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#include "gold.h"
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#include "elfcpp.h"
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using elfcpp::Convert;
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namespace gold {
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// Version information. Will change frequently during the development, later
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// we could think about backward (and forward?) compatibility.
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const int INCREMENTAL_LINK_VERSION = 1;
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namespace internal {
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// Header of the .gnu_incremental_input section.
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struct Incremental_input_header_data
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{
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// Incremental linker version.
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elfcpp::Elf_Word version;
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// Numer of input files in the link.
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elfcpp::Elf_Word input_file_count;
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// Offset of command line options in .gnu_incremental_strtab.
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elfcpp::Elf_Word command_line_offset;
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// Padding.
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elfcpp::Elf_Word reserved;
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};
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// Data stored in .gnu_incremental_input after the header for each of the
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// Incremental_input_header_data::input_file_count input entries.
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struct Incremental_input_entry_data
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{
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// Offset of file name in .gnu_incremental_strtab section.
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elfcpp::Elf_Word filename_offset;
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// Offset of data in .gnu_incremental_input.
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elfcpp::Elf_Word data_offset;
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// Timestamp (in seconds).
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elfcpp::Elf_Xword timestamp_sec;
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// Nano-second part of timestamp (if supported).
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elfcpp::Elf_Word timestamp_usec;
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// Type of the input entry.
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elfcpp::Elf_Half input_type;
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// Padding.
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elfcpp::Elf_Half reserved;
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};
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}
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// Accessors.
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// See internal::Incremental_input_header for fields descriptions.
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template<int size, bool big_endian>
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class Incremental_input_header_write
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{
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public:
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Incremental_input_header_write(unsigned char *p)
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: p_(reinterpret_cast<internal::Incremental_input_header_data>(p))
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{ }
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void
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put_version(elfcpp::Elf_Word v)
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{ this->p_->version = Convert<32, big_endian>::convert_host(v); }
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void
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input_file_count(elfcpp::Elf_Word v)
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{ this->p_->input_file_count = Convert<32, big_endian>::convert_host(v); }
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void
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command_line_offset(elfcpp::Elf_Word v)
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{ this->p_->command_line_offset = Convert<32, big_endian>::convert_host(v); }
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void
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reserved(elfcpp::Elf_Word v)
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{ this->p_->reserved = Convert<32, big_endian>::convert_host(v); }
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private:
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internal::Incremental_input_header_data* p_;
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};
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// See internal::Incremental_input_entry for fields descriptions.
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template<int size, bool big_endian>
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class Incremental_input_entry_write
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{
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public:
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Incremental_input_entry_write(unsigned char *p)
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: p_(reinterpret_cast<internal::Incremental_input_entry_data>(p))
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{ }
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void
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put_filename_offset(elfcpp::Elf_Word v)
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{ this->p_->filename_offset = Convert<32, big_endian>::convert_host(v); }
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void
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put_data_offset(elfcpp::Elf_Word v)
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{ this->p_->data_offset = Convert<32, big_endian>::convert_host(v); }
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void
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put_timestamp_sec(elfcpp::Elf_Word v)
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{ this->p_->timestamp_sec = Convert<32, big_endian>::convert_host(v); }
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void
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put_timestamp_usec(elfcpp::Elf_Word v)
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{ this->p_->timestamp_usec = Convert<32, big_endian>::convert_host(v); }
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void
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put_input_type(elfcpp::Elf_Word v)
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{ this->p_->input_type = Convert<32, big_endian>::convert_host(v); }
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void
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put_reserved(elfcpp::Elf_Word v)
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{ this->p_->reserved = Convert<32, big_endian>::convert_host(v); }
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private:
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internal::Incremental_input_entry_data* p_;
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};
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} // End namespace gold.
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