2006-09-22 00:13:18 +02:00
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// layout.h -- lay out output file sections for gold -*- C++ -*-
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2009-03-01 23:22:02 +01:00
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// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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2007-09-22 23:02:10 +02:00
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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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2006-09-22 00:13:18 +02:00
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#ifndef GOLD_LAYOUT_H
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#define GOLD_LAYOUT_H
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2008-05-01 03:23:21 +02:00
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#include <cstring>
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2006-09-22 00:13:18 +02:00
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#include <list>
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2009-07-17 03:07:33 +02:00
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#include <map>
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2006-09-22 00:13:18 +02:00
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#include <string>
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#include <utility>
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#include <vector>
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2008-01-09 20:57:45 +01:00
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#include "script.h"
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2006-09-22 00:13:18 +02:00
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#include "workqueue.h"
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#include "object.h"
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2006-12-06 01:02:36 +01:00
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#include "dynobj.h"
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2006-09-22 00:13:18 +02:00
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#include "stringpool.h"
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namespace gold
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{
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2006-11-03 19:26:11 +01:00
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class General_options;
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2009-04-24 17:44:02 +02:00
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class Incremental_inputs;
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2006-09-26 23:00:34 +02:00
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class Input_objects;
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2008-05-21 23:37:44 +02:00
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class Mapfile;
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2006-09-28 00:53:42 +02:00
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class Symbol_table;
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2006-11-03 19:26:11 +01:00
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class Output_section_data;
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2006-09-22 00:13:18 +02:00
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class Output_section;
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2006-09-28 00:53:42 +02:00
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class Output_section_headers;
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2009-09-17 Doug Kwan <dougkwan@google.com>
* debug.h (DEBUG_RELAXATION): New constant.
(DEBUG_ALL): Add DEBUG_RELAXATION.
(debug_string_to_enum): Add relaxation debug option.
* layout.cc
(Layout::Relaxation_debug_check::check_output_data_for_reset_values,
Layout::Relaxation_debug_check::read_sections,
Layout::Relaxation_debug_check::read_sections): New method definitions.
(Layout::Layout): Initialize data members
record_output_section_data_from_scrips_,
script_output_section_data_list_ and relaxation_debug_check_.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method definitions.
(Layout::finalize): Support relaxation. Move section layout code to
Layout::relaxation_loop_body.
(Layout::set_asection_address_from_script): Move code for orphan
section placement out.
(Layout::place_orphan_sections_in_script): New method definition.
* layout.h (Output_segment_headers, Output_file_header):
New forward class declarations.
(Layout::~Layout): Define.
(Layout::new_output_section_data_from_script): New method definition.
(Layout::place_orphan_sections_in_script): New method declaration.
(Layout::Segment_states): New type declaration.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method declarations.
(Layout::Output_section_data_list): New type declaration.
(Layout::Relaxation_debug_check): New class definition.
(Layout::record_output_section_data_from_script_,
Layout::script_output_section_data_list_, Layout::segment_states_,
Layout::relaxation_debug_check_): New data members.
* output.cc: (Output_section_headers::do_size): New method definition.
(Output_section_headers::Output_section_headers): Move size
computation to Output_section_headers::do_size.
(Output_segment_headers::do_size): New method definition.
(Output_file_header::Output_file_header): Move size computation to
Output_file_header::do_size and call it.
(Output_file_header::do_size): New method definition.
(Output_data_group::Output_data_group): Adjust call to
Output_section_data.
(Output_data_dynamic::set_final_data_size): Add DT_NULL tag only once.
(Output_symtab_xindex::do_write): Add array bound check.
(Output_section::Input_section::print_to_mapfile): Handle
RELAXED_INPUT_SECTION_CODE.
(Output_section::Output_section): Initialize data member checkpoint_.
(Output_section::~Output_section): Delete checkpoint object pointed
by checkpoint_.
(Output_section::add_input_section): Always add an Input_section if
relaxing.
(Output_section::add_merge_input_section): Add assert.
(Output_section::relax_input_section): New method definition.
(Output_section::set_final_data_size): Set load address to zero for
an unallocated section.
(Output_section::do_address_and_file_offset_have_reset_values):
New method definition.
(Output_section::Input_section_sort_enty::Input_section_sort_enty):
Handle relaxed input section.
(Output_section::sort_attached_input_sections): Checkpoint input
section list lazily.
(Output_section::get_input_sections): Change type of input_sections to
list of Simple_input_section pointers. Checkpoint input section list
lazily. Also handle relaxed input sections.
(Output_section::add_input_section_for_script): Take a reference to
a Simple_input_section object instead of Relobj pointer and section
index as parameter. Handle relaxed input sections.
(Output_section::save_states, Output_section::restore_states): New
method definitions.
* output.h (Output_data::Output_data): Initialize is_data_size_fixed_.
(Output_data::is_data_size_fixed): New method definition.
(Output_data::reset_addresss_and_file_offset): Do not reset data size
if it is fixed.
(Output_data::address_and_file_offset_have_reset_values): New method
definition.
(Output_data::do_address_and_file_offset_have_reset_values): New method
definition.
(Output_data::set_data_size): Check that data size is not fixed.
(Output_data::fix_data_size): New method definition.
(Output_data::is_data_size_fixed_): New data member.
(Output_section_headers::set_final_data_size): New method definition.
(Output_section_headers::do_size): New method declaration.
(Output_segment_headers::set_final_data_size): New method definition.
(Output_segment_headers::do_size): New method declaration.
(Output_file_header::set_final_data_size)::New method definition.
(Output_file_header::do_size)::New method declaration.
(Output_section_data::Output_section_data): Add new parameter
is_data_size_fixed and use it to fix data size.
(Output_data_const::Output_data_const): Adjust call to base class
constructor and fix data size.
(Output_data_const_buffer::Output_data_const_buffer): Adjust call to
base class constructor and fix data size.
(Output_data_fixed_space::Output_data_fixed_space): Adjust call to
base class constructor and fix data size.
(Output_data_zero_fill::Output_data_zero_fill): Adjust call to base
class constructor and fix data size.
(Output_data_group::set_final_data_size): New method definition.
(Output_data_dynamic::Dynamic_entry::tag): New method definition.
(Output_symtab_xindex::Output_symtab_xindex): Adjust call to base
class constructor and fix data size.
(Output_relaxed_input_section): New class definition.
(Output_section::Simple_input_section): New class definition.
(Output_section::get_input_sections): Adjust parameter list.
(Output_section::add_input_section_for_script): Same.
(Output_section::save_states, Output_section::restore_states,
Output_section::do_address_and_file_offset_have_reset_values,
(Output_section::Input_section::Input_section): Handle
RELAXED_INPUT_SECTION_CODE. Add new overload for
Output_relaxed_input_section.
(Output_section::Input_section::is_input_section,
Output_section::Input_section::set_output_section): Handle relaxed
input section.
(Output_section::Input_section::is_relaxed_input_section,
Output_section::Input_section::output_section_data,
Output_section::Input_section::relaxed_input_section): New method
definitions.
(Output_section::Input_section::RELAXED_INPUT_SECTION_CODE): New enum
value.
(Output_section::Input_section::u1_): Update comments.
(Output_section::Input_section::u2_): Add new union member poris.
(Output_section::Checkpoint_output_section): New classs definition.
(Output_section::relax_input_section): New method declaration.
(Output_section::checkpoint_): New data member.
(Output_segment): Update comments.
(Output_segment::Output_segment): Un-privatize copy constructor.
(Output_segment::operator=): Un-privatize.
* script-sections.cc (Output_section_element::Input_section_list):
Change element type to Output_section::Simple_input_section.
(Output_section_element_dot_assignment::set_section_addresses):
Register output section data for relaxation clean up.
(Output_data_exression::Output_data_expression): Adjust call to base
constructor to fix data size.
(Output_section_element_data::set_section_addresses): Register
Output_data_expression object for relaxation clean up.
(struct Input_section_info): Replace Relobj pointer and section index
pair with Output_section::Simple_input_section and Convert struct to a
class.
(Input_section_sorter::operator()): Adjust access to
Input_section_info data member to use accessors.
(Output_section_element_input::set_section_addresses): Use layout
parameter. Adjust code to use Output_section::Simple_input_section
and Input_secction_info classes. Register filler for relaxation
clean up.
(Orphan_output_section::set_section_addresses): Replace Relobj pointer
and section index pair with Output_section::Simple_input_section
class. Adjust code accordingly.
(Phdrs_element::release_segment): New method definition.
(Script_sections::attach_sections_using_phdrs_clause): Do not modify
segment list.
(Script_sections::release_segments): New method definition.
* gold/script-sections.h (Script_sections::release_segments): New
method declaration.
* gold/target.h (Target::may_relax, Target::relax,
Target::do_may_relax, Target::do_relax): New method definitions.
2009-09-18 03:10:38 +02:00
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class Output_segment_headers;
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class Output_file_header;
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2006-09-22 00:13:18 +02:00
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class Output_segment;
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2006-09-26 23:00:34 +02:00
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class Output_data;
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2006-11-29 18:56:40 +01:00
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class Output_data_dynamic;
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2008-04-19 20:30:58 +02:00
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class Output_symtab_xindex;
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2008-05-28 22:48:16 +02:00
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class Output_reduced_debug_abbrev_section;
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class Output_reduced_debug_info_section;
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2007-11-09 08:00:15 +01:00
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class Eh_frame;
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2006-09-29 21:58:17 +02:00
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class Target;
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2006-09-22 00:13:18 +02:00
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2006-10-20 22:40:49 +02:00
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// This task function handles mapping the input sections to output
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// sections and laying them out in memory.
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2006-09-22 00:13:18 +02:00
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2006-10-20 22:40:49 +02:00
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class Layout_task_runner : public Task_function_runner
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2006-09-22 00:13:18 +02:00
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{
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public:
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// OPTIONS is the command line options, INPUT_OBJECTS is the list of
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2006-10-20 22:40:49 +02:00
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// input objects, SYMTAB is the symbol table, LAYOUT is the layout
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// object.
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Layout_task_runner(const General_options& options,
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const Input_objects* input_objects,
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Symbol_table* symtab,
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2008-02-28 01:18:24 +01:00
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Target* target,
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2008-05-21 23:37:44 +02:00
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Layout* layout,
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Mapfile* mapfile)
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2006-09-28 00:53:42 +02:00
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: options_(options), input_objects_(input_objects), symtab_(symtab),
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2008-05-21 23:37:44 +02:00
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target_(target), layout_(layout), mapfile_(mapfile)
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2006-09-22 00:13:18 +02:00
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{ }
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2006-10-20 22:40:49 +02:00
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// Run the operation.
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2006-09-22 00:13:18 +02:00
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void
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2007-12-14 20:00:21 +01:00
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run(Workqueue*, const Task*);
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2006-09-22 00:13:18 +02:00
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private:
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2006-10-20 22:40:49 +02:00
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Layout_task_runner(const Layout_task_runner&);
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Layout_task_runner& operator=(const Layout_task_runner&);
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2006-09-22 00:13:18 +02:00
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const General_options& options_;
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2006-09-26 23:00:34 +02:00
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const Input_objects* input_objects_;
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2006-09-28 00:53:42 +02:00
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Symbol_table* symtab_;
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2008-02-28 01:18:24 +01:00
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Target* target_;
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2006-10-06 22:40:16 +02:00
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Layout* layout_;
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2008-05-21 23:37:44 +02:00
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Mapfile* mapfile_;
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2006-09-22 00:13:18 +02:00
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};
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2009-07-17 03:07:33 +02:00
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// This class holds information about the comdat group or
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// .gnu.linkonce section that will be kept for a given signature.
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2009-03-01 23:22:02 +01:00
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2009-07-17 03:07:33 +02:00
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class Kept_section
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2009-03-01 23:22:02 +01:00
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{
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2009-07-17 03:07:33 +02:00
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private:
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// For a comdat group, we build a mapping from the name of each
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// section in the group to the section index and the size in object.
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// When we discard a group in some other object file, we use this
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// map to figure out which kept section the discarded section is
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// associated with. We then use that mapping when processing relocs
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// against discarded sections.
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struct Comdat_section_info
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{
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// The section index.
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unsigned int shndx;
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// The section size.
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uint64_t size;
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Comdat_section_info(unsigned int a_shndx, uint64_t a_size)
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: shndx(a_shndx), size(a_size)
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{ }
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};
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// Most comdat groups have only one or two sections, so we use a
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// std::map rather than an Unordered_map to optimize for that case
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// without paying too heavily for groups with more sections.
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typedef std::map<std::string, Comdat_section_info> Comdat_group;
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public:
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2009-03-01 23:22:02 +01:00
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Kept_section()
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2009-07-17 03:07:33 +02:00
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: object_(NULL), shndx_(0), is_comdat_(false), is_group_name_(false)
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{ this->u_.linkonce_size = 0; }
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// We need to support copies for the signature map in the Layout
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// object, but we should never copy an object after it has been
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// marked as a comdat section.
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Kept_section(const Kept_section& k)
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: object_(k.object_), shndx_(k.shndx_), is_comdat_(false),
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is_group_name_(k.is_group_name_)
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{
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gold_assert(!k.is_comdat_);
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this->u_.linkonce_size = 0;
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}
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~Kept_section()
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{
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if (this->is_comdat_)
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delete this->u_.group_sections;
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}
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// The object where this section lives.
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Relobj*
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object() const
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{ return this->object_; }
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2009-03-01 23:22:02 +01:00
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2009-07-17 03:07:33 +02:00
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// Set the object.
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void
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set_object(Relobj* object)
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{
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gold_assert(this->object_ == NULL);
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this->object_ = object;
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}
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// The section index.
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unsigned int
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shndx() const
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{ return this->shndx_; }
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// Set the section index.
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void
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set_shndx(unsigned int shndx)
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{
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gold_assert(this->shndx_ == 0);
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this->shndx_ = shndx;
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}
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// Whether this is a comdat group.
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bool
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is_comdat() const
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{ return this->is_comdat_; }
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// Set that this is a comdat group.
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void
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set_is_comdat()
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{
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gold_assert(!this->is_comdat_);
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this->is_comdat_ = true;
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this->u_.group_sections = new Comdat_group();
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}
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2009-03-01 23:22:02 +01:00
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2009-07-17 03:07:33 +02:00
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// Whether this is associated with the name of a group or section
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// rather than the symbol name derived from a linkonce section.
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bool
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is_group_name() const
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{ return this->is_group_name_; }
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// Note that this represents a comdat group rather than a single
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// linkonce section.
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void
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set_is_group_name()
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{ this->is_group_name_ = true; }
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// Add a section to the group list.
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void
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add_comdat_section(const std::string& name, unsigned int shndx,
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uint64_t size)
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{
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gold_assert(this->is_comdat_);
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Comdat_section_info sinfo(shndx, size);
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this->u_.group_sections->insert(std::make_pair(name, sinfo));
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}
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// Look for a section name in the group list, and return whether it
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// was found. If found, returns the section index and size.
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bool
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find_comdat_section(const std::string& name, unsigned int *pshndx,
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uint64_t *psize) const
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{
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gold_assert(this->is_comdat_);
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Comdat_group::const_iterator p = this->u_.group_sections->find(name);
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if (p == this->u_.group_sections->end())
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return false;
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*pshndx = p->second.shndx;
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*psize = p->second.size;
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return true;
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}
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// If there is only one section in the group list, return true, and
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// return the section index and size.
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bool
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|
|
|
find_single_comdat_section(unsigned int *pshndx, uint64_t *psize) const
|
|
|
|
{
|
|
|
|
gold_assert(this->is_comdat_);
|
|
|
|
if (this->u_.group_sections->size() != 1)
|
|
|
|
return false;
|
|
|
|
Comdat_group::const_iterator p = this->u_.group_sections->begin();
|
|
|
|
*pshndx = p->second.shndx;
|
|
|
|
*psize = p->second.size;
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Return the size of a linkonce section.
|
|
|
|
uint64_t
|
|
|
|
linkonce_size() const
|
|
|
|
{
|
|
|
|
gold_assert(!this->is_comdat_);
|
|
|
|
return this->u_.linkonce_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Set the size of a linkonce section.
|
|
|
|
void
|
|
|
|
set_linkonce_size(uint64_t size)
|
|
|
|
{
|
|
|
|
gold_assert(!this->is_comdat_);
|
|
|
|
this->u_.linkonce_size = size;
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
// No assignment.
|
|
|
|
Kept_section& operator=(const Kept_section&);
|
|
|
|
|
|
|
|
// The object containing the comdat group or .gnu.linkonce section.
|
|
|
|
Relobj* object_;
|
|
|
|
// Index of the group section for comdats and the section itself for
|
2009-03-01 23:22:02 +01:00
|
|
|
// .gnu.linkonce.
|
2009-07-17 03:07:33 +02:00
|
|
|
unsigned int shndx_;
|
|
|
|
// True if this is for a comdat group rather than a .gnu.linkonce
|
|
|
|
// section.
|
|
|
|
bool is_comdat_;
|
2009-03-01 23:22:02 +01:00
|
|
|
// The Kept_sections are values of a mapping, that maps names to
|
|
|
|
// them. This field is true if this struct is associated with the
|
|
|
|
// name of a comdat or .gnu.linkonce, false if it is associated with
|
|
|
|
// the name of a symbol obtained from the .gnu.linkonce.* name
|
|
|
|
// through some heuristics.
|
2009-07-17 03:07:33 +02:00
|
|
|
bool is_group_name_;
|
|
|
|
union
|
|
|
|
{
|
|
|
|
// If the is_comdat_ field is true, this holds a map from names of
|
|
|
|
// the sections in the group to section indexes in object_ and to
|
|
|
|
// section sizes.
|
|
|
|
Comdat_group* group_sections;
|
|
|
|
// If the is_comdat_ field is false, this holds the size of the
|
|
|
|
// single section.
|
|
|
|
uint64_t linkonce_size;
|
|
|
|
} u_;
|
2009-03-01 23:22:02 +01:00
|
|
|
};
|
|
|
|
|
2006-09-22 00:13:18 +02:00
|
|
|
// This class handles the details of laying out input sections.
|
|
|
|
|
|
|
|
class Layout
|
|
|
|
{
|
|
|
|
public:
|
2009-04-02 06:19:03 +02:00
|
|
|
Layout(int number_of_input_files, Script_options*);
|
2006-09-26 23:00:34 +02:00
|
|
|
|
2009-09-17 Doug Kwan <dougkwan@google.com>
* debug.h (DEBUG_RELAXATION): New constant.
(DEBUG_ALL): Add DEBUG_RELAXATION.
(debug_string_to_enum): Add relaxation debug option.
* layout.cc
(Layout::Relaxation_debug_check::check_output_data_for_reset_values,
Layout::Relaxation_debug_check::read_sections,
Layout::Relaxation_debug_check::read_sections): New method definitions.
(Layout::Layout): Initialize data members
record_output_section_data_from_scrips_,
script_output_section_data_list_ and relaxation_debug_check_.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method definitions.
(Layout::finalize): Support relaxation. Move section layout code to
Layout::relaxation_loop_body.
(Layout::set_asection_address_from_script): Move code for orphan
section placement out.
(Layout::place_orphan_sections_in_script): New method definition.
* layout.h (Output_segment_headers, Output_file_header):
New forward class declarations.
(Layout::~Layout): Define.
(Layout::new_output_section_data_from_script): New method definition.
(Layout::place_orphan_sections_in_script): New method declaration.
(Layout::Segment_states): New type declaration.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method declarations.
(Layout::Output_section_data_list): New type declaration.
(Layout::Relaxation_debug_check): New class definition.
(Layout::record_output_section_data_from_script_,
Layout::script_output_section_data_list_, Layout::segment_states_,
Layout::relaxation_debug_check_): New data members.
* output.cc: (Output_section_headers::do_size): New method definition.
(Output_section_headers::Output_section_headers): Move size
computation to Output_section_headers::do_size.
(Output_segment_headers::do_size): New method definition.
(Output_file_header::Output_file_header): Move size computation to
Output_file_header::do_size and call it.
(Output_file_header::do_size): New method definition.
(Output_data_group::Output_data_group): Adjust call to
Output_section_data.
(Output_data_dynamic::set_final_data_size): Add DT_NULL tag only once.
(Output_symtab_xindex::do_write): Add array bound check.
(Output_section::Input_section::print_to_mapfile): Handle
RELAXED_INPUT_SECTION_CODE.
(Output_section::Output_section): Initialize data member checkpoint_.
(Output_section::~Output_section): Delete checkpoint object pointed
by checkpoint_.
(Output_section::add_input_section): Always add an Input_section if
relaxing.
(Output_section::add_merge_input_section): Add assert.
(Output_section::relax_input_section): New method definition.
(Output_section::set_final_data_size): Set load address to zero for
an unallocated section.
(Output_section::do_address_and_file_offset_have_reset_values):
New method definition.
(Output_section::Input_section_sort_enty::Input_section_sort_enty):
Handle relaxed input section.
(Output_section::sort_attached_input_sections): Checkpoint input
section list lazily.
(Output_section::get_input_sections): Change type of input_sections to
list of Simple_input_section pointers. Checkpoint input section list
lazily. Also handle relaxed input sections.
(Output_section::add_input_section_for_script): Take a reference to
a Simple_input_section object instead of Relobj pointer and section
index as parameter. Handle relaxed input sections.
(Output_section::save_states, Output_section::restore_states): New
method definitions.
* output.h (Output_data::Output_data): Initialize is_data_size_fixed_.
(Output_data::is_data_size_fixed): New method definition.
(Output_data::reset_addresss_and_file_offset): Do not reset data size
if it is fixed.
(Output_data::address_and_file_offset_have_reset_values): New method
definition.
(Output_data::do_address_and_file_offset_have_reset_values): New method
definition.
(Output_data::set_data_size): Check that data size is not fixed.
(Output_data::fix_data_size): New method definition.
(Output_data::is_data_size_fixed_): New data member.
(Output_section_headers::set_final_data_size): New method definition.
(Output_section_headers::do_size): New method declaration.
(Output_segment_headers::set_final_data_size): New method definition.
(Output_segment_headers::do_size): New method declaration.
(Output_file_header::set_final_data_size)::New method definition.
(Output_file_header::do_size)::New method declaration.
(Output_section_data::Output_section_data): Add new parameter
is_data_size_fixed and use it to fix data size.
(Output_data_const::Output_data_const): Adjust call to base class
constructor and fix data size.
(Output_data_const_buffer::Output_data_const_buffer): Adjust call to
base class constructor and fix data size.
(Output_data_fixed_space::Output_data_fixed_space): Adjust call to
base class constructor and fix data size.
(Output_data_zero_fill::Output_data_zero_fill): Adjust call to base
class constructor and fix data size.
(Output_data_group::set_final_data_size): New method definition.
(Output_data_dynamic::Dynamic_entry::tag): New method definition.
(Output_symtab_xindex::Output_symtab_xindex): Adjust call to base
class constructor and fix data size.
(Output_relaxed_input_section): New class definition.
(Output_section::Simple_input_section): New class definition.
(Output_section::get_input_sections): Adjust parameter list.
(Output_section::add_input_section_for_script): Same.
(Output_section::save_states, Output_section::restore_states,
Output_section::do_address_and_file_offset_have_reset_values,
(Output_section::Input_section::Input_section): Handle
RELAXED_INPUT_SECTION_CODE. Add new overload for
Output_relaxed_input_section.
(Output_section::Input_section::is_input_section,
Output_section::Input_section::set_output_section): Handle relaxed
input section.
(Output_section::Input_section::is_relaxed_input_section,
Output_section::Input_section::output_section_data,
Output_section::Input_section::relaxed_input_section): New method
definitions.
(Output_section::Input_section::RELAXED_INPUT_SECTION_CODE): New enum
value.
(Output_section::Input_section::u1_): Update comments.
(Output_section::Input_section::u2_): Add new union member poris.
(Output_section::Checkpoint_output_section): New classs definition.
(Output_section::relax_input_section): New method declaration.
(Output_section::checkpoint_): New data member.
(Output_segment): Update comments.
(Output_segment::Output_segment): Un-privatize copy constructor.
(Output_segment::operator=): Un-privatize.
* script-sections.cc (Output_section_element::Input_section_list):
Change element type to Output_section::Simple_input_section.
(Output_section_element_dot_assignment::set_section_addresses):
Register output section data for relaxation clean up.
(Output_data_exression::Output_data_expression): Adjust call to base
constructor to fix data size.
(Output_section_element_data::set_section_addresses): Register
Output_data_expression object for relaxation clean up.
(struct Input_section_info): Replace Relobj pointer and section index
pair with Output_section::Simple_input_section and Convert struct to a
class.
(Input_section_sorter::operator()): Adjust access to
Input_section_info data member to use accessors.
(Output_section_element_input::set_section_addresses): Use layout
parameter. Adjust code to use Output_section::Simple_input_section
and Input_secction_info classes. Register filler for relaxation
clean up.
(Orphan_output_section::set_section_addresses): Replace Relobj pointer
and section index pair with Output_section::Simple_input_section
class. Adjust code accordingly.
(Phdrs_element::release_segment): New method definition.
(Script_sections::attach_sections_using_phdrs_clause): Do not modify
segment list.
(Script_sections::release_segments): New method definition.
* gold/script-sections.h (Script_sections::release_segments): New
method declaration.
* gold/target.h (Target::may_relax, Target::relax,
Target::do_may_relax, Target::do_relax): New method definitions.
2009-09-18 03:10:38 +02:00
|
|
|
~Layout()
|
|
|
|
{
|
|
|
|
delete this->relaxation_debug_check_;
|
|
|
|
delete this->segment_states_;
|
|
|
|
}
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// Given an input section SHNDX, named NAME, with data in SHDR, from
|
|
|
|
// the object file OBJECT, return the output section where this
|
2007-11-09 08:00:15 +01:00
|
|
|
// input section should go. RELOC_SHNDX is the index of a
|
|
|
|
// relocation section which applies to this section, or 0 if none,
|
|
|
|
// or -1U if more than one. RELOC_TYPE is the type of the
|
|
|
|
// relocation section if there is one. Set *OFFSET to the offset
|
|
|
|
// within the output section.
|
2006-09-22 00:13:18 +02:00
|
|
|
template<int size, bool big_endian>
|
|
|
|
Output_section*
|
2007-11-09 08:00:15 +01:00
|
|
|
layout(Sized_relobj<size, big_endian> *object, unsigned int shndx,
|
|
|
|
const char* name, const elfcpp::Shdr<size, big_endian>& shdr,
|
|
|
|
unsigned int reloc_shndx, unsigned int reloc_type, off_t* offset);
|
|
|
|
|
2008-02-06 09:13:50 +01:00
|
|
|
// Layout an input reloc section when doing a relocatable link. The
|
|
|
|
// section is RELOC_SHNDX in OBJECT, with data in SHDR.
|
|
|
|
// DATA_SECTION is the reloc section to which it refers. RR is the
|
|
|
|
// relocatable information.
|
|
|
|
template<int size, bool big_endian>
|
|
|
|
Output_section*
|
|
|
|
layout_reloc(Sized_relobj<size, big_endian>* object,
|
|
|
|
unsigned int reloc_shndx,
|
|
|
|
const elfcpp::Shdr<size, big_endian>& shdr,
|
|
|
|
Output_section* data_section,
|
|
|
|
Relocatable_relocs* rr);
|
|
|
|
|
|
|
|
// Layout a group section when doing a relocatable link.
|
|
|
|
template<int size, bool big_endian>
|
|
|
|
void
|
|
|
|
layout_group(Symbol_table* symtab,
|
|
|
|
Sized_relobj<size, big_endian>* object,
|
|
|
|
unsigned int group_shndx,
|
|
|
|
const char* group_section_name,
|
|
|
|
const char* signature,
|
|
|
|
const elfcpp::Shdr<size, big_endian>& shdr,
|
2008-05-05 21:16:43 +02:00
|
|
|
elfcpp::Elf_Word flags,
|
|
|
|
std::vector<unsigned int>* shndxes);
|
2008-02-06 09:13:50 +01:00
|
|
|
|
2007-11-09 08:00:15 +01:00
|
|
|
// Like layout, only for exception frame sections. OBJECT is an
|
|
|
|
// object file. SYMBOLS is the contents of the symbol table
|
|
|
|
// section, with size SYMBOLS_SIZE. SYMBOL_NAMES is the contents of
|
|
|
|
// the symbol name section, with size SYMBOL_NAMES_SIZE. SHNDX is a
|
|
|
|
// .eh_frame section in OBJECT. SHDR is the section header.
|
|
|
|
// RELOC_SHNDX is the index of a relocation section which applies to
|
|
|
|
// this section, or 0 if none, or -1U if more than one. RELOC_TYPE
|
|
|
|
// is the type of the relocation section if there is one. This
|
|
|
|
// returns the output section, and sets *OFFSET to the offset.
|
|
|
|
template<int size, bool big_endian>
|
|
|
|
Output_section*
|
|
|
|
layout_eh_frame(Sized_relobj<size, big_endian>* object,
|
|
|
|
const unsigned char* symbols,
|
|
|
|
off_t symbols_size,
|
|
|
|
const unsigned char* symbol_names,
|
|
|
|
off_t symbol_names_size,
|
|
|
|
unsigned int shndx,
|
|
|
|
const elfcpp::Shdr<size, big_endian>& shdr,
|
|
|
|
unsigned int reloc_shndx, unsigned int reloc_type,
|
|
|
|
off_t* offset);
|
2006-09-22 00:13:18 +02:00
|
|
|
|
2007-10-23 07:05:48 +02:00
|
|
|
// Handle a GNU stack note. This is called once per input object
|
|
|
|
// file. SEEN_GNU_STACK is true if the object file has a
|
|
|
|
// .note.GNU-stack section. GNU_STACK_FLAGS is the section flags
|
|
|
|
// from that section if there was one.
|
|
|
|
void
|
|
|
|
layout_gnu_stack(bool seen_gnu_stack, uint64_t gnu_stack_flags);
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// Add an Output_section_data to the layout. This is used for
|
2009-11-04 16:56:03 +01:00
|
|
|
// special sections like the GOT section. IS_DYNAMIC_LINKER_SECTION
|
|
|
|
// is true for sections which are used by the dynamic linker, such
|
|
|
|
// as dynamic reloc sections.
|
2008-05-20 06:00:47 +02:00
|
|
|
Output_section*
|
2006-11-03 19:26:11 +01:00
|
|
|
add_output_section_data(const char* name, elfcpp::Elf_Word type,
|
|
|
|
elfcpp::Elf_Xword flags,
|
2009-11-04 16:56:03 +01:00
|
|
|
Output_section_data*, bool is_dynamic_linker_section);
|
2006-11-03 19:26:11 +01:00
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
// Create dynamic sections if necessary.
|
|
|
|
void
|
2008-01-26 02:17:45 +01:00
|
|
|
create_initial_dynamic_sections(Symbol_table*);
|
2006-11-29 18:56:40 +01:00
|
|
|
|
2007-09-22 06:42:09 +02:00
|
|
|
// Define __start and __stop symbols for output sections.
|
|
|
|
void
|
2008-01-26 02:17:45 +01:00
|
|
|
define_section_symbols(Symbol_table*);
|
2007-09-22 06:42:09 +02:00
|
|
|
|
2009-06-24 21:48:51 +02:00
|
|
|
// Create automatic note sections.
|
|
|
|
void
|
|
|
|
create_notes();
|
|
|
|
|
2008-02-28 05:45:47 +01:00
|
|
|
// Create sections for linker scripts.
|
|
|
|
void
|
|
|
|
create_script_sections()
|
|
|
|
{ this->script_options_->create_script_sections(this); }
|
|
|
|
|
2008-01-09 20:57:45 +01:00
|
|
|
// Define symbols from any linker script.
|
|
|
|
void
|
2008-01-26 02:17:45 +01:00
|
|
|
define_script_symbols(Symbol_table* symtab)
|
|
|
|
{ this->script_options_->add_symbols_to_table(symtab); }
|
2008-01-09 20:57:45 +01:00
|
|
|
|
2008-02-06 20:32:32 +01:00
|
|
|
// Define symbols for group signatures.
|
|
|
|
void
|
|
|
|
define_group_signatures(Symbol_table*);
|
|
|
|
|
2006-09-29 21:58:17 +02:00
|
|
|
// Return the Stringpool used for symbol names.
|
|
|
|
const Stringpool*
|
|
|
|
sympool() const
|
|
|
|
{ return &this->sympool_; }
|
|
|
|
|
2006-12-01 17:51:25 +01:00
|
|
|
// Return the Stringpool used for dynamic symbol names and dynamic
|
|
|
|
// tags.
|
|
|
|
const Stringpool*
|
|
|
|
dynpool() const
|
|
|
|
{ return &this->dynpool_; }
|
|
|
|
|
2008-04-19 20:30:58 +02:00
|
|
|
// Return the symtab_xindex section used to hold large section
|
|
|
|
// indexes for the normal symbol table.
|
|
|
|
Output_symtab_xindex*
|
|
|
|
symtab_xindex() const
|
|
|
|
{ return this->symtab_xindex_; }
|
|
|
|
|
|
|
|
// Return the dynsym_xindex section used to hold large section
|
|
|
|
// indexes for the dynamic symbol table.
|
|
|
|
Output_symtab_xindex*
|
|
|
|
dynsym_xindex() const
|
|
|
|
{ return this->dynsym_xindex_; }
|
|
|
|
|
2006-09-22 00:13:18 +02:00
|
|
|
// Return whether a section is a .gnu.linkonce section, given the
|
|
|
|
// section name.
|
|
|
|
static inline bool
|
|
|
|
is_linkonce(const char* name)
|
|
|
|
{ return strncmp(name, ".gnu.linkonce", sizeof(".gnu.linkonce") - 1) == 0; }
|
|
|
|
|
2008-05-01 03:23:21 +02:00
|
|
|
// Return true if a section is a debugging section.
|
|
|
|
static inline bool
|
|
|
|
is_debug_info_section(const char* name)
|
|
|
|
{
|
|
|
|
// Debugging sections can only be recognized by name.
|
|
|
|
return (strncmp(name, ".debug", sizeof(".debug") - 1) == 0
|
2009-03-01 23:22:02 +01:00
|
|
|
|| strncmp(name, ".gnu.linkonce.wi.",
|
2008-05-01 03:23:21 +02:00
|
|
|
sizeof(".gnu.linkonce.wi.") - 1) == 0
|
|
|
|
|| strncmp(name, ".line", sizeof(".line") - 1) == 0
|
|
|
|
|| strncmp(name, ".stab", sizeof(".stab") - 1) == 0);
|
|
|
|
}
|
|
|
|
|
2009-03-01 23:22:02 +01:00
|
|
|
// Check if a comdat group or .gnu.linkonce section with the given
|
|
|
|
// NAME is selected for the link. If there is already a section,
|
|
|
|
// *KEPT_SECTION is set to point to the signature and the function
|
2009-07-17 03:07:33 +02:00
|
|
|
// returns false. Otherwise, OBJECT, SHNDX,IS_COMDAT, and
|
|
|
|
// IS_GROUP_NAME are recorded for this NAME in the layout object,
|
|
|
|
// *KEPT_SECTION is set to the internal copy and the function return
|
|
|
|
// false.
|
2006-09-22 00:13:18 +02:00
|
|
|
bool
|
2009-07-17 03:07:33 +02:00
|
|
|
find_or_add_kept_section(const std::string& name, Relobj* object,
|
|
|
|
unsigned int shndx, bool is_comdat,
|
|
|
|
bool is_group_name, Kept_section** kept_section);
|
2006-09-22 00:13:18 +02:00
|
|
|
|
2006-09-26 23:00:34 +02:00
|
|
|
// Finalize the layout after all the input sections have been added.
|
2006-09-28 00:53:42 +02:00
|
|
|
off_t
|
2008-02-28 01:18:24 +01:00
|
|
|
finalize(const Input_objects*, Symbol_table*, Target*, const Task*);
|
2007-12-14 20:00:21 +01:00
|
|
|
|
|
|
|
// Return whether any sections require postprocessing.
|
|
|
|
bool
|
|
|
|
any_postprocessing_sections() const
|
|
|
|
{ return this->any_postprocessing_sections_; }
|
2006-09-26 23:00:34 +02:00
|
|
|
|
2007-10-12 07:51:25 +02:00
|
|
|
// Return the size of the output file.
|
|
|
|
off_t
|
|
|
|
output_file_size() const
|
|
|
|
{ return this->output_file_size_; }
|
|
|
|
|
2006-12-01 17:51:25 +01:00
|
|
|
// Return the TLS segment. This will return NULL if there isn't
|
|
|
|
// one.
|
2006-10-20 22:40:49 +02:00
|
|
|
Output_segment*
|
|
|
|
tls_segment() const
|
|
|
|
{ return this->tls_segment_; }
|
|
|
|
|
2006-12-01 17:51:25 +01:00
|
|
|
// Return the normal symbol table.
|
|
|
|
Output_section*
|
|
|
|
symtab_section() const
|
|
|
|
{
|
|
|
|
gold_assert(this->symtab_section_ != NULL);
|
|
|
|
return this->symtab_section_;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Return the dynamic symbol table.
|
|
|
|
Output_section*
|
|
|
|
dynsym_section() const
|
|
|
|
{
|
|
|
|
gold_assert(this->dynsym_section_ != NULL);
|
|
|
|
return this->dynsym_section_;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Return the dynamic tags.
|
|
|
|
Output_data_dynamic*
|
|
|
|
dynamic_data() const
|
|
|
|
{ return this->dynamic_data_; }
|
|
|
|
|
2007-11-09 08:00:15 +01:00
|
|
|
// Write out the output sections.
|
|
|
|
void
|
|
|
|
write_output_sections(Output_file* of) const;
|
|
|
|
|
2006-09-29 21:58:17 +02:00
|
|
|
// Write out data not associated with an input file or the symbol
|
|
|
|
// table.
|
|
|
|
void
|
2007-09-26 09:01:35 +02:00
|
|
|
write_data(const Symbol_table*, Output_file*) const;
|
2006-09-29 21:58:17 +02:00
|
|
|
|
2007-11-09 08:00:15 +01:00
|
|
|
// Write out output sections which can not be written until all the
|
|
|
|
// input sections are complete.
|
|
|
|
void
|
2007-11-29 21:10:17 +01:00
|
|
|
write_sections_after_input_sections(Output_file* of);
|
2007-11-09 08:00:15 +01:00
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// Return an output section named NAME, or NULL if there is none.
|
|
|
|
Output_section*
|
|
|
|
find_output_section(const char* name) const;
|
|
|
|
|
|
|
|
// Return an output segment of type TYPE, with segment flags SET set
|
|
|
|
// and segment flags CLEAR clear. Return NULL if there is none.
|
|
|
|
Output_segment*
|
|
|
|
find_output_segment(elfcpp::PT type, elfcpp::Elf_Word set,
|
|
|
|
elfcpp::Elf_Word clear) const;
|
|
|
|
|
2008-02-04 07:45:50 +01:00
|
|
|
// Return the number of segments we expect to produce.
|
|
|
|
size_t
|
|
|
|
expected_segment_count() const;
|
|
|
|
|
2007-12-12 00:30:52 +01:00
|
|
|
// Set a flag to indicate that an object file uses the static TLS model.
|
|
|
|
void
|
|
|
|
set_has_static_tls()
|
|
|
|
{ this->has_static_tls_ = true; }
|
|
|
|
|
|
|
|
// Return true if any object file uses the static TLS model.
|
|
|
|
bool
|
|
|
|
has_static_tls() const
|
|
|
|
{ return this->has_static_tls_; }
|
|
|
|
|
2008-01-09 20:57:45 +01:00
|
|
|
// Return the options which may be set by a linker script.
|
|
|
|
Script_options*
|
|
|
|
script_options()
|
|
|
|
{ return this->script_options_; }
|
|
|
|
|
|
|
|
const Script_options*
|
|
|
|
script_options() const
|
|
|
|
{ return this->script_options_; }
|
2008-01-06 01:47:10 +01:00
|
|
|
|
2009-04-24 17:44:02 +02:00
|
|
|
// Return the object managing inputs in incremental build. NULL in
|
|
|
|
// non-incremental builds.
|
|
|
|
Incremental_inputs*
|
|
|
|
incremental_inputs()
|
|
|
|
{ return this->incremental_inputs_; }
|
|
|
|
|
* options.h (class General_options): Define build_id option.
* layout.h (class Layout): Declare write_build_id, create_note,
create_build_id. Add build_id_note_ member.
* layout.cc: Include <cerrno>, <fcntl.h>, <unistd.h>,
"libiberty.h", "md5.h", "sha1.h".
(Layout::Layout): Initialize eh_frame_data_,
eh_frame_hdr_section_, and build_id_note_.
(Layout::finalize): Call create_build_id.
(Layout::create_note): New function, broken out of
Layout::create_gold_note.
(Layout::create_gold_note): Call create_note.
(Layout::create_build_id): New function.
(Layout::write_build_id): New function.
(Close_task_runner::run): Call write_build_id.
2008-03-25 06:11:41 +01:00
|
|
|
// Compute and write out the build ID if needed.
|
|
|
|
void
|
|
|
|
write_build_id(Output_file*) const;
|
|
|
|
|
2008-02-07 08:33:46 +01:00
|
|
|
// Rewrite output file in binary format.
|
|
|
|
void
|
|
|
|
write_binary(Output_file* in) const;
|
|
|
|
|
2008-05-21 23:37:44 +02:00
|
|
|
// Print output sections to the map file.
|
|
|
|
void
|
|
|
|
print_to_mapfile(Mapfile*) const;
|
|
|
|
|
2007-12-05 01:48:49 +01:00
|
|
|
// Dump statistical information to stderr.
|
|
|
|
void
|
|
|
|
print_stats() const;
|
|
|
|
|
2008-02-04 06:43:05 +01:00
|
|
|
// A list of segments.
|
2006-09-26 23:00:34 +02:00
|
|
|
|
|
|
|
typedef std::vector<Output_segment*> Segment_list;
|
|
|
|
|
2008-02-04 06:43:05 +01:00
|
|
|
// A list of sections.
|
2006-09-26 23:00:34 +02:00
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
typedef std::vector<Output_section*> Section_list;
|
2006-09-26 23:00:34 +02:00
|
|
|
|
|
|
|
// The list of information to write out which is not attached to
|
|
|
|
// either a section or a segment.
|
2006-11-29 18:56:40 +01:00
|
|
|
typedef std::vector<Output_data*> Data_list;
|
2006-09-26 23:00:34 +02:00
|
|
|
|
2008-02-04 06:43:05 +01:00
|
|
|
// Store the allocated sections into the section list. This is used
|
|
|
|
// by the linker script code.
|
|
|
|
void
|
|
|
|
get_allocated_sections(Section_list*) const;
|
|
|
|
|
2008-02-28 05:45:47 +01:00
|
|
|
// Make a section for a linker script to hold data.
|
|
|
|
Output_section*
|
|
|
|
make_output_section_for_script(const char* name);
|
|
|
|
|
2008-02-04 06:43:05 +01:00
|
|
|
// Make a segment. This is used by the linker script code.
|
|
|
|
Output_segment*
|
|
|
|
make_output_segment(elfcpp::Elf_Word type, elfcpp::Elf_Word flags);
|
|
|
|
|
|
|
|
// Return the number of segments.
|
|
|
|
size_t
|
|
|
|
segment_count() const
|
|
|
|
{ return this->segment_list_.size(); }
|
|
|
|
|
|
|
|
// Map from section flags to segment flags.
|
|
|
|
static elfcpp::Elf_Word
|
|
|
|
section_flags_to_segment(elfcpp::Elf_Xword flags);
|
|
|
|
|
2008-04-15 06:06:41 +02:00
|
|
|
// Attach sections to segments.
|
|
|
|
void
|
|
|
|
attach_sections_to_segments();
|
|
|
|
|
2009-09-17 Doug Kwan <dougkwan@google.com>
* debug.h (DEBUG_RELAXATION): New constant.
(DEBUG_ALL): Add DEBUG_RELAXATION.
(debug_string_to_enum): Add relaxation debug option.
* layout.cc
(Layout::Relaxation_debug_check::check_output_data_for_reset_values,
Layout::Relaxation_debug_check::read_sections,
Layout::Relaxation_debug_check::read_sections): New method definitions.
(Layout::Layout): Initialize data members
record_output_section_data_from_scrips_,
script_output_section_data_list_ and relaxation_debug_check_.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method definitions.
(Layout::finalize): Support relaxation. Move section layout code to
Layout::relaxation_loop_body.
(Layout::set_asection_address_from_script): Move code for orphan
section placement out.
(Layout::place_orphan_sections_in_script): New method definition.
* layout.h (Output_segment_headers, Output_file_header):
New forward class declarations.
(Layout::~Layout): Define.
(Layout::new_output_section_data_from_script): New method definition.
(Layout::place_orphan_sections_in_script): New method declaration.
(Layout::Segment_states): New type declaration.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method declarations.
(Layout::Output_section_data_list): New type declaration.
(Layout::Relaxation_debug_check): New class definition.
(Layout::record_output_section_data_from_script_,
Layout::script_output_section_data_list_, Layout::segment_states_,
Layout::relaxation_debug_check_): New data members.
* output.cc: (Output_section_headers::do_size): New method definition.
(Output_section_headers::Output_section_headers): Move size
computation to Output_section_headers::do_size.
(Output_segment_headers::do_size): New method definition.
(Output_file_header::Output_file_header): Move size computation to
Output_file_header::do_size and call it.
(Output_file_header::do_size): New method definition.
(Output_data_group::Output_data_group): Adjust call to
Output_section_data.
(Output_data_dynamic::set_final_data_size): Add DT_NULL tag only once.
(Output_symtab_xindex::do_write): Add array bound check.
(Output_section::Input_section::print_to_mapfile): Handle
RELAXED_INPUT_SECTION_CODE.
(Output_section::Output_section): Initialize data member checkpoint_.
(Output_section::~Output_section): Delete checkpoint object pointed
by checkpoint_.
(Output_section::add_input_section): Always add an Input_section if
relaxing.
(Output_section::add_merge_input_section): Add assert.
(Output_section::relax_input_section): New method definition.
(Output_section::set_final_data_size): Set load address to zero for
an unallocated section.
(Output_section::do_address_and_file_offset_have_reset_values):
New method definition.
(Output_section::Input_section_sort_enty::Input_section_sort_enty):
Handle relaxed input section.
(Output_section::sort_attached_input_sections): Checkpoint input
section list lazily.
(Output_section::get_input_sections): Change type of input_sections to
list of Simple_input_section pointers. Checkpoint input section list
lazily. Also handle relaxed input sections.
(Output_section::add_input_section_for_script): Take a reference to
a Simple_input_section object instead of Relobj pointer and section
index as parameter. Handle relaxed input sections.
(Output_section::save_states, Output_section::restore_states): New
method definitions.
* output.h (Output_data::Output_data): Initialize is_data_size_fixed_.
(Output_data::is_data_size_fixed): New method definition.
(Output_data::reset_addresss_and_file_offset): Do not reset data size
if it is fixed.
(Output_data::address_and_file_offset_have_reset_values): New method
definition.
(Output_data::do_address_and_file_offset_have_reset_values): New method
definition.
(Output_data::set_data_size): Check that data size is not fixed.
(Output_data::fix_data_size): New method definition.
(Output_data::is_data_size_fixed_): New data member.
(Output_section_headers::set_final_data_size): New method definition.
(Output_section_headers::do_size): New method declaration.
(Output_segment_headers::set_final_data_size): New method definition.
(Output_segment_headers::do_size): New method declaration.
(Output_file_header::set_final_data_size)::New method definition.
(Output_file_header::do_size)::New method declaration.
(Output_section_data::Output_section_data): Add new parameter
is_data_size_fixed and use it to fix data size.
(Output_data_const::Output_data_const): Adjust call to base class
constructor and fix data size.
(Output_data_const_buffer::Output_data_const_buffer): Adjust call to
base class constructor and fix data size.
(Output_data_fixed_space::Output_data_fixed_space): Adjust call to
base class constructor and fix data size.
(Output_data_zero_fill::Output_data_zero_fill): Adjust call to base
class constructor and fix data size.
(Output_data_group::set_final_data_size): New method definition.
(Output_data_dynamic::Dynamic_entry::tag): New method definition.
(Output_symtab_xindex::Output_symtab_xindex): Adjust call to base
class constructor and fix data size.
(Output_relaxed_input_section): New class definition.
(Output_section::Simple_input_section): New class definition.
(Output_section::get_input_sections): Adjust parameter list.
(Output_section::add_input_section_for_script): Same.
(Output_section::save_states, Output_section::restore_states,
Output_section::do_address_and_file_offset_have_reset_values,
(Output_section::Input_section::Input_section): Handle
RELAXED_INPUT_SECTION_CODE. Add new overload for
Output_relaxed_input_section.
(Output_section::Input_section::is_input_section,
Output_section::Input_section::set_output_section): Handle relaxed
input section.
(Output_section::Input_section::is_relaxed_input_section,
Output_section::Input_section::output_section_data,
Output_section::Input_section::relaxed_input_section): New method
definitions.
(Output_section::Input_section::RELAXED_INPUT_SECTION_CODE): New enum
value.
(Output_section::Input_section::u1_): Update comments.
(Output_section::Input_section::u2_): Add new union member poris.
(Output_section::Checkpoint_output_section): New classs definition.
(Output_section::relax_input_section): New method declaration.
(Output_section::checkpoint_): New data member.
(Output_segment): Update comments.
(Output_segment::Output_segment): Un-privatize copy constructor.
(Output_segment::operator=): Un-privatize.
* script-sections.cc (Output_section_element::Input_section_list):
Change element type to Output_section::Simple_input_section.
(Output_section_element_dot_assignment::set_section_addresses):
Register output section data for relaxation clean up.
(Output_data_exression::Output_data_expression): Adjust call to base
constructor to fix data size.
(Output_section_element_data::set_section_addresses): Register
Output_data_expression object for relaxation clean up.
(struct Input_section_info): Replace Relobj pointer and section index
pair with Output_section::Simple_input_section and Convert struct to a
class.
(Input_section_sorter::operator()): Adjust access to
Input_section_info data member to use accessors.
(Output_section_element_input::set_section_addresses): Use layout
parameter. Adjust code to use Output_section::Simple_input_section
and Input_secction_info classes. Register filler for relaxation
clean up.
(Orphan_output_section::set_section_addresses): Replace Relobj pointer
and section index pair with Output_section::Simple_input_section
class. Adjust code accordingly.
(Phdrs_element::release_segment): New method definition.
(Script_sections::attach_sections_using_phdrs_clause): Do not modify
segment list.
(Script_sections::release_segments): New method definition.
* gold/script-sections.h (Script_sections::release_segments): New
method declaration.
* gold/target.h (Target::may_relax, Target::relax,
Target::do_may_relax, Target::do_relax): New method definitions.
2009-09-18 03:10:38 +02:00
|
|
|
// For relaxation clean up, we need to know output section data created
|
|
|
|
// from a linker script.
|
|
|
|
void
|
|
|
|
new_output_section_data_from_script(Output_section_data* posd)
|
|
|
|
{
|
|
|
|
if (this->record_output_section_data_from_script_)
|
|
|
|
this->script_output_section_data_list_.push_back(posd);
|
|
|
|
}
|
|
|
|
|
2009-10-09 Doug Kwan <dougkwan@google.com>
* layout.cc (Layout::make_output_section): Call target hook to make
ordinary output section.
(Layout::finalize): Adjust parameter list of call the
Target::may_relax().
* layout.h (class Layout::section_list): New method.
* merge.h (Output_merge_base::entsize): Change visibility to public.
(Output_merge_base::is_string, Output_merge_base::do_is_string):
New methods.
(Output_merge_string::do_is_string): New method.
* object.cc (Sized_relobj::do_setup): renamed from
Sized_relobj::set_up.
* object.h (Sized_relobj::adjust_shndx,
Sized_relobj::initializ_input_to_output_maps,
Sized_relobj::free_input_to_output_maps): Change visibilities to
protected.
(Sized_relobj::setup): Virtualize.
(Sized_relobj::do_setup): New method declaration.
(Sized_relobj::invalidate_section_offset,
Sized_relobj::do_invalidate_section_offset): New method decfinitions.
(Sized_relobj::elf_file, Sized_relobj::local_values): New methods.
* options.cc (parse_int): New function.
* options.h (parse_int): New declaration.
(DEFINE_int): New macro.
(stub_group_size): New option.
* output.cc (Output_section::Output_section): Initialize memebers
merge_section_map_, merge_section_by_properties_map_,
relaxed_input_section_map_, is_relaxed_input_section_map_valid_.
(Output_section::add_input_section): Handled deferred code-fill
generation and remove an old comment.
(Output_section::add_relaxed_input_section): New method definition.
(Output_section::add_merge_input_section): Use merge section by
properties map to speed to search. Update merge section maps
as appropriate.
(Output_section::build_relaxation_map): New method definition.
(Output_section::convert_input_sections_in_list_to_relaxed_sections):
Same.
(Output_section::relax_input_section): Renamed to
Output_section::convert_input_sections_to_relaxed_sections and change
interface to take a vector of pointers to relaxed sections.
(Output_section::find_merge_section,
Output_section::find_relaxed_input_section): New method definitions.
(Output_section::is_input_address_mapped,
Output_section::output_offset, Output_section::output_address):
Use output section data maps to speed up searching.
(Output_section::find_starting_output_address): Add comments.
(Output_section::do_write,
Output_section::write_to_postprocessing_buffer): Do code-fill
generation as appropriate.
(Output_section::get_input_sections): Invalidate relaxed input section
map.
(Output_section::restore_states): Adjust type of checkpoint .
Invalidate relaxed input section map.
* output.h (Output_merge_base): New class declaration.
(Input_section_specifier): New class defintion.
(class Output_relaxed_input_section) Change base class to
Output_section_data_build.
(Output_relaxed_input_section::Output_relaxed_input_section): Adjust
base class initializer.
(Output_section::add_relaxed_input_section): New method declaration.
(Output_section::Input_section): Change visibility to protected.
(Output_section::Input_section::relobj,
Output_section::Input_section::shndx): Handle relaxed input sections.
Output_section::input_sections) Change visibility to protected. Also
define overload to return a non-const pointer.
(Output_section::Merge_section_properties): New class defintion.
(Output_section::Merge_section_by_properties_map,
Output_section::Output_section_data_by_input_section_map,
Output_section::Relaxation_map): New types.
(Output_section::relax_input_section): Rename method to
Output_section::convert_input_sections_to_relaxed_sections and change
interface to take a vector of relaxed section pointers.
(Output_section::find_merge_section,
Output_section::find_relaxed_input_section,
Output_section::build_relaxation_map,
Output_section::convert_input_sections_in_list_to_relaxed_sections):
New method declarations.
(Output_section::merge_section_map_
Output_section::merge_section_by_properties_map_,
Output_section::relaxed_input_section_map_,
Output_section::is_relaxed_input_section_map_valid_,
Output_section::generate_code_fills_at_write_): New data members.
* script-sections.cc
(Output_section_element_input::set_section_addresses): Call
current_data_size and addralign methods of relaxed input sections.
(Orphan_output_section::set_section_addresses): Call current_data_size
and addralign methods of relaxed input sections.
* symtab.cc (Symbol_table::compute_final_value): Extract template
from the body of Symbol_table::sized_finalize_symbol.
(Symbol_table::sized_finalized_symbol): Call
Symbol_table::compute_final_value.
* symtab.h (Symbol_table::Compute_final_value_status): New enum type.
(Symbol_table::compute_final_value): New templated method declaration.
* target.cc (Target::do_make_output_section): New method defintion.
* target.h (Target::make_output_section): New method declaration.
(Target::relax): Add more parameters for input objects, symbol table
and layout. Adjust call to do_relax.
(Target::do_make_output_section): New method declaration.
(Target::do_relax): Add parameters for input objects, symbol table
and layout.
2009-10-10 01:18:19 +02:00
|
|
|
// Return section list.
|
|
|
|
const Section_list&
|
|
|
|
section_list() const
|
|
|
|
{ return this->section_list_; }
|
|
|
|
|
2006-09-22 00:13:18 +02:00
|
|
|
private:
|
|
|
|
Layout(const Layout&);
|
|
|
|
Layout& operator=(const Layout&);
|
|
|
|
|
2009-06-04 02:43:11 +02:00
|
|
|
// Mapping from input section names to output section names.
|
|
|
|
struct Section_name_mapping
|
2006-09-22 00:13:18 +02:00
|
|
|
{
|
|
|
|
const char* from;
|
|
|
|
int fromlen;
|
|
|
|
const char* to;
|
2006-11-03 19:26:11 +01:00
|
|
|
int tolen;
|
2006-09-22 00:13:18 +02:00
|
|
|
};
|
2009-06-04 02:43:11 +02:00
|
|
|
static const Section_name_mapping section_name_mapping[];
|
|
|
|
static const int section_name_mapping_count;
|
2006-09-22 00:13:18 +02:00
|
|
|
|
2008-02-06 20:32:32 +01:00
|
|
|
// During a relocatable link, a list of group sections and
|
|
|
|
// signatures.
|
|
|
|
struct Group_signature
|
|
|
|
{
|
|
|
|
// The group section.
|
|
|
|
Output_section* section;
|
|
|
|
// The signature.
|
|
|
|
const char* signature;
|
|
|
|
|
|
|
|
Group_signature()
|
|
|
|
: section(NULL), signature(NULL)
|
|
|
|
{ }
|
|
|
|
|
|
|
|
Group_signature(Output_section* sectiona, const char* signaturea)
|
|
|
|
: section(sectiona), signature(signaturea)
|
|
|
|
{ }
|
|
|
|
};
|
|
|
|
typedef std::vector<Group_signature> Group_signatures;
|
|
|
|
|
2009-03-17 21:36:30 +01:00
|
|
|
// Create a note section, filling in the header.
|
* options.h (class General_options): Define build_id option.
* layout.h (class Layout): Declare write_build_id, create_note,
create_build_id. Add build_id_note_ member.
* layout.cc: Include <cerrno>, <fcntl.h>, <unistd.h>,
"libiberty.h", "md5.h", "sha1.h".
(Layout::Layout): Initialize eh_frame_data_,
eh_frame_hdr_section_, and build_id_note_.
(Layout::finalize): Call create_build_id.
(Layout::create_note): New function, broken out of
Layout::create_gold_note.
(Layout::create_gold_note): Call create_note.
(Layout::create_build_id): New function.
(Layout::write_build_id): New function.
(Close_task_runner::run): Call write_build_id.
2008-03-25 06:11:41 +01:00
|
|
|
Output_section*
|
2009-03-17 21:36:30 +01:00
|
|
|
create_note(const char* name, int note_type, const char *section_name,
|
|
|
|
size_t descsz, bool allocate, size_t* trailing_padding);
|
* options.h (class General_options): Define build_id option.
* layout.h (class Layout): Declare write_build_id, create_note,
create_build_id. Add build_id_note_ member.
* layout.cc: Include <cerrno>, <fcntl.h>, <unistd.h>,
"libiberty.h", "md5.h", "sha1.h".
(Layout::Layout): Initialize eh_frame_data_,
eh_frame_hdr_section_, and build_id_note_.
(Layout::finalize): Call create_build_id.
(Layout::create_note): New function, broken out of
Layout::create_gold_note.
(Layout::create_gold_note): Call create_note.
(Layout::create_build_id): New function.
(Layout::write_build_id): New function.
(Close_task_runner::run): Call write_build_id.
2008-03-25 06:11:41 +01:00
|
|
|
|
2009-03-17 21:36:30 +01:00
|
|
|
// Create a note section for gold version.
|
2007-10-09 23:37:55 +02:00
|
|
|
void
|
2007-10-23 07:05:48 +02:00
|
|
|
create_gold_note();
|
|
|
|
|
|
|
|
// Record whether the stack must be executable.
|
|
|
|
void
|
2009-06-24 21:48:51 +02:00
|
|
|
create_executable_stack_info();
|
2007-10-09 23:37:55 +02:00
|
|
|
|
* options.h (class General_options): Define build_id option.
* layout.h (class Layout): Declare write_build_id, create_note,
create_build_id. Add build_id_note_ member.
* layout.cc: Include <cerrno>, <fcntl.h>, <unistd.h>,
"libiberty.h", "md5.h", "sha1.h".
(Layout::Layout): Initialize eh_frame_data_,
eh_frame_hdr_section_, and build_id_note_.
(Layout::finalize): Call create_build_id.
(Layout::create_note): New function, broken out of
Layout::create_gold_note.
(Layout::create_gold_note): Call create_note.
(Layout::create_build_id): New function.
(Layout::write_build_id): New function.
(Close_task_runner::run): Call write_build_id.
2008-03-25 06:11:41 +01:00
|
|
|
// Create a build ID note if needed.
|
|
|
|
void
|
|
|
|
create_build_id();
|
|
|
|
|
2009-06-24 02:38:00 +02:00
|
|
|
// Link .stab and .stabstr sections.
|
|
|
|
void
|
|
|
|
link_stabs_sections();
|
|
|
|
|
2009-04-24 17:44:02 +02:00
|
|
|
// Create .gnu_incremental_inputs and .gnu_incremental_strtab sections needed
|
|
|
|
// for the next run of incremental linking to check what has changed.
|
|
|
|
void
|
|
|
|
create_incremental_info_sections();
|
|
|
|
|
2006-09-28 00:53:42 +02:00
|
|
|
// Find the first read-only PT_LOAD segment, creating one if
|
|
|
|
// necessary.
|
|
|
|
Output_segment*
|
|
|
|
find_first_load_seg();
|
|
|
|
|
2007-12-06 06:55:50 +01:00
|
|
|
// Count the local symbols in the regular symbol table and the dynamic
|
|
|
|
// symbol table, and build the respective string pools.
|
|
|
|
void
|
2007-12-14 20:00:21 +01:00
|
|
|
count_local_symbols(const Task*, const Input_objects*);
|
2007-12-06 06:55:50 +01:00
|
|
|
|
2006-09-26 23:00:34 +02:00
|
|
|
// Create the output sections for the symbol table.
|
|
|
|
void
|
2008-04-19 20:30:58 +02:00
|
|
|
create_symtab_sections(const Input_objects*, Symbol_table*,
|
|
|
|
unsigned int, off_t*);
|
2006-09-26 23:00:34 +02:00
|
|
|
|
2006-09-28 00:53:42 +02:00
|
|
|
// Create the .shstrtab section.
|
|
|
|
Output_section*
|
|
|
|
create_shstrtab();
|
|
|
|
|
|
|
|
// Create the section header table.
|
2007-11-29 21:10:17 +01:00
|
|
|
void
|
2008-04-19 20:30:58 +02:00
|
|
|
create_shdrs(const Output_section* shstrtab_section, off_t*);
|
2006-09-26 23:00:34 +02:00
|
|
|
|
2006-11-14 20:21:05 +01:00
|
|
|
// Create the dynamic symbol table.
|
|
|
|
void
|
2008-01-26 02:17:45 +01:00
|
|
|
create_dynamic_symtab(const Input_objects*, Symbol_table*,
|
|
|
|
Output_section** pdynstr,
|
2006-12-06 01:02:36 +01:00
|
|
|
unsigned int* plocal_dynamic_count,
|
|
|
|
std::vector<Symbol*>* pdynamic_symbols,
|
|
|
|
Versions* versions);
|
2006-11-14 20:21:05 +01:00
|
|
|
|
2007-12-06 06:55:50 +01:00
|
|
|
// Assign offsets to each local portion of the dynamic symbol table.
|
|
|
|
void
|
|
|
|
assign_local_dynsym_offsets(const Input_objects*);
|
|
|
|
|
2006-11-29 18:56:40 +01:00
|
|
|
// Finish the .dynamic section and PT_DYNAMIC segment.
|
2006-11-14 20:21:05 +01:00
|
|
|
void
|
2006-12-01 17:51:25 +01:00
|
|
|
finish_dynamic_section(const Input_objects*, const Symbol_table*);
|
2006-11-14 20:21:05 +01:00
|
|
|
|
|
|
|
// Create the .interp section and PT_INTERP segment.
|
|
|
|
void
|
|
|
|
create_interp(const Target* target);
|
|
|
|
|
2006-12-06 01:02:36 +01:00
|
|
|
// Create the version sections.
|
|
|
|
void
|
2007-09-26 09:01:35 +02:00
|
|
|
create_version_sections(const Versions*,
|
2007-10-23 01:08:22 +02:00
|
|
|
const Symbol_table*,
|
2006-12-06 01:02:36 +01:00
|
|
|
unsigned int local_symcount,
|
|
|
|
const std::vector<Symbol*>& dynamic_symbols,
|
|
|
|
const Output_section* dynstr);
|
|
|
|
|
|
|
|
template<int size, bool big_endian>
|
|
|
|
void
|
|
|
|
sized_create_version_sections(const Versions* versions,
|
2007-10-23 01:08:22 +02:00
|
|
|
const Symbol_table*,
|
2006-12-06 01:02:36 +01:00
|
|
|
unsigned int local_symcount,
|
|
|
|
const std::vector<Symbol*>& dynamic_symbols,
|
2008-02-29 20:19:17 +01:00
|
|
|
const Output_section* dynstr);
|
2006-12-06 01:02:36 +01:00
|
|
|
|
2006-09-22 00:13:18 +02:00
|
|
|
// Return whether to include this section in the link.
|
|
|
|
template<int size, bool big_endian>
|
|
|
|
bool
|
2007-11-09 08:00:15 +01:00
|
|
|
include_section(Sized_relobj<size, big_endian>* object, const char* name,
|
2006-09-22 00:13:18 +02:00
|
|
|
const elfcpp::Shdr<size, big_endian>&);
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// Return the output section name to use given an input section
|
|
|
|
// name. Set *PLEN to the length of the name. *PLEN must be
|
|
|
|
// initialized to the length of NAME.
|
|
|
|
static const char*
|
|
|
|
output_section_name(const char* name, size_t* plen);
|
|
|
|
|
2008-04-19 20:30:58 +02:00
|
|
|
// Return the number of allocated output sections.
|
|
|
|
size_t
|
|
|
|
allocated_output_section_count() const;
|
|
|
|
|
2006-11-03 19:26:11 +01:00
|
|
|
// Return the output section for NAME, TYPE and FLAGS.
|
|
|
|
Output_section*
|
2006-11-07 05:40:46 +01:00
|
|
|
get_output_section(const char* name, Stringpool::Key name_key,
|
2009-11-04 16:56:03 +01:00
|
|
|
elfcpp::Elf_Word type, elfcpp::Elf_Xword flags,
|
|
|
|
bool is_interp, bool is_dynamic_linker_section);
|
2006-09-22 00:13:18 +02:00
|
|
|
|
2008-02-04 06:43:05 +01:00
|
|
|
// Choose the output section for NAME in RELOBJ.
|
|
|
|
Output_section*
|
|
|
|
choose_output_section(const Relobj* relobj, const char* name,
|
|
|
|
elfcpp::Elf_Word type, elfcpp::Elf_Xword flags,
|
2009-11-04 16:56:03 +01:00
|
|
|
bool is_input_section, bool is_interp,
|
|
|
|
bool is_dynamic_linker_section);
|
2008-02-04 06:43:05 +01:00
|
|
|
|
2006-09-22 00:13:18 +02:00
|
|
|
// Create a new Output_section.
|
|
|
|
Output_section*
|
|
|
|
make_output_section(const char* name, elfcpp::Elf_Word type,
|
2009-11-04 16:56:03 +01:00
|
|
|
elfcpp::Elf_Xword flags, bool is_interp,
|
|
|
|
bool is_dynamic_linker_section);
|
2006-09-22 00:13:18 +02:00
|
|
|
|
2008-03-11 17:50:08 +01:00
|
|
|
// Attach a section to a segment.
|
|
|
|
void
|
2008-04-15 06:06:41 +02:00
|
|
|
attach_section_to_segment(Output_section*);
|
2008-03-11 17:50:08 +01:00
|
|
|
|
2008-04-15 06:06:41 +02:00
|
|
|
// Attach an allocated section to a segment.
|
2008-03-12 05:38:42 +01:00
|
|
|
void
|
2008-04-15 06:06:41 +02:00
|
|
|
attach_allocated_section_to_segment(Output_section*);
|
2008-03-12 05:38:42 +01:00
|
|
|
|
2006-11-14 20:21:05 +01:00
|
|
|
// Set the final file offsets of all the segments.
|
|
|
|
off_t
|
|
|
|
set_segment_offsets(const Target*, Output_segment*, unsigned int* pshndx);
|
|
|
|
|
2008-02-06 09:13:50 +01:00
|
|
|
// Set the file offsets of the sections when doing a relocatable
|
|
|
|
// link.
|
|
|
|
off_t
|
|
|
|
set_relocatable_section_offsets(Output_data*, unsigned int* pshndx);
|
|
|
|
|
2007-11-07 23:33:30 +01:00
|
|
|
// Set the final file offsets of all the sections not associated
|
2007-11-30 01:35:27 +01:00
|
|
|
// with a segment. We set section offsets in three passes: the
|
|
|
|
// first handles all allocated sections, the second sections that
|
2007-12-14 20:00:21 +01:00
|
|
|
// require postprocessing, and the last the late-bound STRTAB
|
|
|
|
// sections (probably only shstrtab, which is the one we care about
|
|
|
|
// because it holds section names).
|
2007-11-30 01:35:27 +01:00
|
|
|
enum Section_offset_pass
|
|
|
|
{
|
|
|
|
BEFORE_INPUT_SECTIONS_PASS,
|
2007-12-14 20:00:21 +01:00
|
|
|
POSTPROCESSING_SECTIONS_PASS,
|
|
|
|
STRTAB_AFTER_POSTPROCESSING_SECTIONS_PASS
|
2007-11-30 01:35:27 +01:00
|
|
|
};
|
2006-11-14 20:21:05 +01:00
|
|
|
off_t
|
2007-11-30 01:35:27 +01:00
|
|
|
set_section_offsets(off_t, Section_offset_pass pass);
|
|
|
|
|
2007-11-07 23:33:30 +01:00
|
|
|
// Set the final section indexes of all the sections not associated
|
|
|
|
// with a segment. Returns the next unused index.
|
|
|
|
unsigned int
|
|
|
|
set_section_indexes(unsigned int pshndx);
|
2006-11-14 20:21:05 +01:00
|
|
|
|
2008-02-04 06:43:05 +01:00
|
|
|
// Set the section addresses when using a script.
|
|
|
|
Output_segment*
|
|
|
|
set_section_addresses_from_script(Symbol_table*);
|
|
|
|
|
2009-09-17 Doug Kwan <dougkwan@google.com>
* debug.h (DEBUG_RELAXATION): New constant.
(DEBUG_ALL): Add DEBUG_RELAXATION.
(debug_string_to_enum): Add relaxation debug option.
* layout.cc
(Layout::Relaxation_debug_check::check_output_data_for_reset_values,
Layout::Relaxation_debug_check::read_sections,
Layout::Relaxation_debug_check::read_sections): New method definitions.
(Layout::Layout): Initialize data members
record_output_section_data_from_scrips_,
script_output_section_data_list_ and relaxation_debug_check_.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method definitions.
(Layout::finalize): Support relaxation. Move section layout code to
Layout::relaxation_loop_body.
(Layout::set_asection_address_from_script): Move code for orphan
section placement out.
(Layout::place_orphan_sections_in_script): New method definition.
* layout.h (Output_segment_headers, Output_file_header):
New forward class declarations.
(Layout::~Layout): Define.
(Layout::new_output_section_data_from_script): New method definition.
(Layout::place_orphan_sections_in_script): New method declaration.
(Layout::Segment_states): New type declaration.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method declarations.
(Layout::Output_section_data_list): New type declaration.
(Layout::Relaxation_debug_check): New class definition.
(Layout::record_output_section_data_from_script_,
Layout::script_output_section_data_list_, Layout::segment_states_,
Layout::relaxation_debug_check_): New data members.
* output.cc: (Output_section_headers::do_size): New method definition.
(Output_section_headers::Output_section_headers): Move size
computation to Output_section_headers::do_size.
(Output_segment_headers::do_size): New method definition.
(Output_file_header::Output_file_header): Move size computation to
Output_file_header::do_size and call it.
(Output_file_header::do_size): New method definition.
(Output_data_group::Output_data_group): Adjust call to
Output_section_data.
(Output_data_dynamic::set_final_data_size): Add DT_NULL tag only once.
(Output_symtab_xindex::do_write): Add array bound check.
(Output_section::Input_section::print_to_mapfile): Handle
RELAXED_INPUT_SECTION_CODE.
(Output_section::Output_section): Initialize data member checkpoint_.
(Output_section::~Output_section): Delete checkpoint object pointed
by checkpoint_.
(Output_section::add_input_section): Always add an Input_section if
relaxing.
(Output_section::add_merge_input_section): Add assert.
(Output_section::relax_input_section): New method definition.
(Output_section::set_final_data_size): Set load address to zero for
an unallocated section.
(Output_section::do_address_and_file_offset_have_reset_values):
New method definition.
(Output_section::Input_section_sort_enty::Input_section_sort_enty):
Handle relaxed input section.
(Output_section::sort_attached_input_sections): Checkpoint input
section list lazily.
(Output_section::get_input_sections): Change type of input_sections to
list of Simple_input_section pointers. Checkpoint input section list
lazily. Also handle relaxed input sections.
(Output_section::add_input_section_for_script): Take a reference to
a Simple_input_section object instead of Relobj pointer and section
index as parameter. Handle relaxed input sections.
(Output_section::save_states, Output_section::restore_states): New
method definitions.
* output.h (Output_data::Output_data): Initialize is_data_size_fixed_.
(Output_data::is_data_size_fixed): New method definition.
(Output_data::reset_addresss_and_file_offset): Do not reset data size
if it is fixed.
(Output_data::address_and_file_offset_have_reset_values): New method
definition.
(Output_data::do_address_and_file_offset_have_reset_values): New method
definition.
(Output_data::set_data_size): Check that data size is not fixed.
(Output_data::fix_data_size): New method definition.
(Output_data::is_data_size_fixed_): New data member.
(Output_section_headers::set_final_data_size): New method definition.
(Output_section_headers::do_size): New method declaration.
(Output_segment_headers::set_final_data_size): New method definition.
(Output_segment_headers::do_size): New method declaration.
(Output_file_header::set_final_data_size)::New method definition.
(Output_file_header::do_size)::New method declaration.
(Output_section_data::Output_section_data): Add new parameter
is_data_size_fixed and use it to fix data size.
(Output_data_const::Output_data_const): Adjust call to base class
constructor and fix data size.
(Output_data_const_buffer::Output_data_const_buffer): Adjust call to
base class constructor and fix data size.
(Output_data_fixed_space::Output_data_fixed_space): Adjust call to
base class constructor and fix data size.
(Output_data_zero_fill::Output_data_zero_fill): Adjust call to base
class constructor and fix data size.
(Output_data_group::set_final_data_size): New method definition.
(Output_data_dynamic::Dynamic_entry::tag): New method definition.
(Output_symtab_xindex::Output_symtab_xindex): Adjust call to base
class constructor and fix data size.
(Output_relaxed_input_section): New class definition.
(Output_section::Simple_input_section): New class definition.
(Output_section::get_input_sections): Adjust parameter list.
(Output_section::add_input_section_for_script): Same.
(Output_section::save_states, Output_section::restore_states,
Output_section::do_address_and_file_offset_have_reset_values,
(Output_section::Input_section::Input_section): Handle
RELAXED_INPUT_SECTION_CODE. Add new overload for
Output_relaxed_input_section.
(Output_section::Input_section::is_input_section,
Output_section::Input_section::set_output_section): Handle relaxed
input section.
(Output_section::Input_section::is_relaxed_input_section,
Output_section::Input_section::output_section_data,
Output_section::Input_section::relaxed_input_section): New method
definitions.
(Output_section::Input_section::RELAXED_INPUT_SECTION_CODE): New enum
value.
(Output_section::Input_section::u1_): Update comments.
(Output_section::Input_section::u2_): Add new union member poris.
(Output_section::Checkpoint_output_section): New classs definition.
(Output_section::relax_input_section): New method declaration.
(Output_section::checkpoint_): New data member.
(Output_segment): Update comments.
(Output_segment::Output_segment): Un-privatize copy constructor.
(Output_segment::operator=): Un-privatize.
* script-sections.cc (Output_section_element::Input_section_list):
Change element type to Output_section::Simple_input_section.
(Output_section_element_dot_assignment::set_section_addresses):
Register output section data for relaxation clean up.
(Output_data_exression::Output_data_expression): Adjust call to base
constructor to fix data size.
(Output_section_element_data::set_section_addresses): Register
Output_data_expression object for relaxation clean up.
(struct Input_section_info): Replace Relobj pointer and section index
pair with Output_section::Simple_input_section and Convert struct to a
class.
(Input_section_sorter::operator()): Adjust access to
Input_section_info data member to use accessors.
(Output_section_element_input::set_section_addresses): Use layout
parameter. Adjust code to use Output_section::Simple_input_section
and Input_secction_info classes. Register filler for relaxation
clean up.
(Orphan_output_section::set_section_addresses): Replace Relobj pointer
and section index pair with Output_section::Simple_input_section
class. Adjust code accordingly.
(Phdrs_element::release_segment): New method definition.
(Script_sections::attach_sections_using_phdrs_clause): Do not modify
segment list.
(Script_sections::release_segments): New method definition.
* gold/script-sections.h (Script_sections::release_segments): New
method declaration.
* gold/target.h (Target::may_relax, Target::relax,
Target::do_may_relax, Target::do_relax): New method definitions.
2009-09-18 03:10:38 +02:00
|
|
|
// Find appropriate places or orphan sections in a script.
|
|
|
|
void
|
|
|
|
place_orphan_sections_in_script();
|
|
|
|
|
2006-09-22 00:13:18 +02:00
|
|
|
// Return whether SEG1 comes before SEG2 in the output file.
|
|
|
|
static bool
|
2006-09-26 23:53:18 +02:00
|
|
|
segment_precedes(const Output_segment* seg1, const Output_segment* seg2);
|
2006-09-22 00:13:18 +02:00
|
|
|
|
2009-09-17 Doug Kwan <dougkwan@google.com>
* debug.h (DEBUG_RELAXATION): New constant.
(DEBUG_ALL): Add DEBUG_RELAXATION.
(debug_string_to_enum): Add relaxation debug option.
* layout.cc
(Layout::Relaxation_debug_check::check_output_data_for_reset_values,
Layout::Relaxation_debug_check::read_sections,
Layout::Relaxation_debug_check::read_sections): New method definitions.
(Layout::Layout): Initialize data members
record_output_section_data_from_scrips_,
script_output_section_data_list_ and relaxation_debug_check_.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method definitions.
(Layout::finalize): Support relaxation. Move section layout code to
Layout::relaxation_loop_body.
(Layout::set_asection_address_from_script): Move code for orphan
section placement out.
(Layout::place_orphan_sections_in_script): New method definition.
* layout.h (Output_segment_headers, Output_file_header):
New forward class declarations.
(Layout::~Layout): Define.
(Layout::new_output_section_data_from_script): New method definition.
(Layout::place_orphan_sections_in_script): New method declaration.
(Layout::Segment_states): New type declaration.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method declarations.
(Layout::Output_section_data_list): New type declaration.
(Layout::Relaxation_debug_check): New class definition.
(Layout::record_output_section_data_from_script_,
Layout::script_output_section_data_list_, Layout::segment_states_,
Layout::relaxation_debug_check_): New data members.
* output.cc: (Output_section_headers::do_size): New method definition.
(Output_section_headers::Output_section_headers): Move size
computation to Output_section_headers::do_size.
(Output_segment_headers::do_size): New method definition.
(Output_file_header::Output_file_header): Move size computation to
Output_file_header::do_size and call it.
(Output_file_header::do_size): New method definition.
(Output_data_group::Output_data_group): Adjust call to
Output_section_data.
(Output_data_dynamic::set_final_data_size): Add DT_NULL tag only once.
(Output_symtab_xindex::do_write): Add array bound check.
(Output_section::Input_section::print_to_mapfile): Handle
RELAXED_INPUT_SECTION_CODE.
(Output_section::Output_section): Initialize data member checkpoint_.
(Output_section::~Output_section): Delete checkpoint object pointed
by checkpoint_.
(Output_section::add_input_section): Always add an Input_section if
relaxing.
(Output_section::add_merge_input_section): Add assert.
(Output_section::relax_input_section): New method definition.
(Output_section::set_final_data_size): Set load address to zero for
an unallocated section.
(Output_section::do_address_and_file_offset_have_reset_values):
New method definition.
(Output_section::Input_section_sort_enty::Input_section_sort_enty):
Handle relaxed input section.
(Output_section::sort_attached_input_sections): Checkpoint input
section list lazily.
(Output_section::get_input_sections): Change type of input_sections to
list of Simple_input_section pointers. Checkpoint input section list
lazily. Also handle relaxed input sections.
(Output_section::add_input_section_for_script): Take a reference to
a Simple_input_section object instead of Relobj pointer and section
index as parameter. Handle relaxed input sections.
(Output_section::save_states, Output_section::restore_states): New
method definitions.
* output.h (Output_data::Output_data): Initialize is_data_size_fixed_.
(Output_data::is_data_size_fixed): New method definition.
(Output_data::reset_addresss_and_file_offset): Do not reset data size
if it is fixed.
(Output_data::address_and_file_offset_have_reset_values): New method
definition.
(Output_data::do_address_and_file_offset_have_reset_values): New method
definition.
(Output_data::set_data_size): Check that data size is not fixed.
(Output_data::fix_data_size): New method definition.
(Output_data::is_data_size_fixed_): New data member.
(Output_section_headers::set_final_data_size): New method definition.
(Output_section_headers::do_size): New method declaration.
(Output_segment_headers::set_final_data_size): New method definition.
(Output_segment_headers::do_size): New method declaration.
(Output_file_header::set_final_data_size)::New method definition.
(Output_file_header::do_size)::New method declaration.
(Output_section_data::Output_section_data): Add new parameter
is_data_size_fixed and use it to fix data size.
(Output_data_const::Output_data_const): Adjust call to base class
constructor and fix data size.
(Output_data_const_buffer::Output_data_const_buffer): Adjust call to
base class constructor and fix data size.
(Output_data_fixed_space::Output_data_fixed_space): Adjust call to
base class constructor and fix data size.
(Output_data_zero_fill::Output_data_zero_fill): Adjust call to base
class constructor and fix data size.
(Output_data_group::set_final_data_size): New method definition.
(Output_data_dynamic::Dynamic_entry::tag): New method definition.
(Output_symtab_xindex::Output_symtab_xindex): Adjust call to base
class constructor and fix data size.
(Output_relaxed_input_section): New class definition.
(Output_section::Simple_input_section): New class definition.
(Output_section::get_input_sections): Adjust parameter list.
(Output_section::add_input_section_for_script): Same.
(Output_section::save_states, Output_section::restore_states,
Output_section::do_address_and_file_offset_have_reset_values,
(Output_section::Input_section::Input_section): Handle
RELAXED_INPUT_SECTION_CODE. Add new overload for
Output_relaxed_input_section.
(Output_section::Input_section::is_input_section,
Output_section::Input_section::set_output_section): Handle relaxed
input section.
(Output_section::Input_section::is_relaxed_input_section,
Output_section::Input_section::output_section_data,
Output_section::Input_section::relaxed_input_section): New method
definitions.
(Output_section::Input_section::RELAXED_INPUT_SECTION_CODE): New enum
value.
(Output_section::Input_section::u1_): Update comments.
(Output_section::Input_section::u2_): Add new union member poris.
(Output_section::Checkpoint_output_section): New classs definition.
(Output_section::relax_input_section): New method declaration.
(Output_section::checkpoint_): New data member.
(Output_segment): Update comments.
(Output_segment::Output_segment): Un-privatize copy constructor.
(Output_segment::operator=): Un-privatize.
* script-sections.cc (Output_section_element::Input_section_list):
Change element type to Output_section::Simple_input_section.
(Output_section_element_dot_assignment::set_section_addresses):
Register output section data for relaxation clean up.
(Output_data_exression::Output_data_expression): Adjust call to base
constructor to fix data size.
(Output_section_element_data::set_section_addresses): Register
Output_data_expression object for relaxation clean up.
(struct Input_section_info): Replace Relobj pointer and section index
pair with Output_section::Simple_input_section and Convert struct to a
class.
(Input_section_sorter::operator()): Adjust access to
Input_section_info data member to use accessors.
(Output_section_element_input::set_section_addresses): Use layout
parameter. Adjust code to use Output_section::Simple_input_section
and Input_secction_info classes. Register filler for relaxation
clean up.
(Orphan_output_section::set_section_addresses): Replace Relobj pointer
and section index pair with Output_section::Simple_input_section
class. Adjust code accordingly.
(Phdrs_element::release_segment): New method definition.
(Script_sections::attach_sections_using_phdrs_clause): Do not modify
segment list.
(Script_sections::release_segments): New method definition.
* gold/script-sections.h (Script_sections::release_segments): New
method declaration.
* gold/target.h (Target::may_relax, Target::relax,
Target::do_may_relax, Target::do_relax): New method definitions.
2009-09-18 03:10:38 +02:00
|
|
|
// Use to save and restore segments during relaxation.
|
|
|
|
typedef Unordered_map<const Output_segment*, const Output_segment*>
|
|
|
|
Segment_states;
|
|
|
|
|
|
|
|
// Save states of current output segments.
|
|
|
|
void
|
|
|
|
save_segments(Segment_states*);
|
|
|
|
|
|
|
|
// Restore output segment states.
|
|
|
|
void
|
|
|
|
restore_segments(const Segment_states*);
|
|
|
|
|
|
|
|
// Clean up after relaxation so that it is possible to lay out the
|
|
|
|
// sections and segments again.
|
|
|
|
void
|
|
|
|
clean_up_after_relaxation();
|
|
|
|
|
|
|
|
// Doing preparation work for relaxation. This is factored out to make
|
|
|
|
// Layout::finalized a bit smaller and easier to read.
|
|
|
|
void
|
|
|
|
prepare_for_relaxation();
|
|
|
|
|
|
|
|
// Main body of the relaxation loop, which lays out the section.
|
|
|
|
off_t
|
|
|
|
relaxation_loop_body(int, Target*, Symbol_table*, Output_segment**,
|
|
|
|
Output_segment*, Output_segment_headers*,
|
|
|
|
Output_file_header*, unsigned int*);
|
|
|
|
|
2009-03-01 23:22:02 +01:00
|
|
|
// A mapping used for kept comdats/.gnu.linkonce group signatures.
|
2008-05-01 03:23:21 +02:00
|
|
|
typedef Unordered_map<std::string, Kept_section> Signatures;
|
2006-09-22 00:13:18 +02:00
|
|
|
|
|
|
|
// Mapping from input section name/type/flags to output section. We
|
|
|
|
// use canonicalized strings here.
|
|
|
|
|
2006-11-07 05:40:46 +01:00
|
|
|
typedef std::pair<Stringpool::Key,
|
2006-09-22 00:13:18 +02:00
|
|
|
std::pair<elfcpp::Elf_Word, elfcpp::Elf_Xword> > Key;
|
|
|
|
|
|
|
|
struct Hash_key
|
|
|
|
{
|
|
|
|
size_t
|
|
|
|
operator()(const Key& k) const;
|
|
|
|
};
|
|
|
|
|
|
|
|
typedef Unordered_map<Key, Output_section*, Hash_key> Section_name_map;
|
|
|
|
|
|
|
|
// A comparison class for segments.
|
|
|
|
|
|
|
|
struct Compare_segments
|
|
|
|
{
|
|
|
|
bool
|
|
|
|
operator()(const Output_segment* seg1, const Output_segment* seg2)
|
|
|
|
{ return Layout::segment_precedes(seg1, seg2); }
|
|
|
|
};
|
|
|
|
|
2009-09-17 Doug Kwan <dougkwan@google.com>
* debug.h (DEBUG_RELAXATION): New constant.
(DEBUG_ALL): Add DEBUG_RELAXATION.
(debug_string_to_enum): Add relaxation debug option.
* layout.cc
(Layout::Relaxation_debug_check::check_output_data_for_reset_values,
Layout::Relaxation_debug_check::read_sections,
Layout::Relaxation_debug_check::read_sections): New method definitions.
(Layout::Layout): Initialize data members
record_output_section_data_from_scrips_,
script_output_section_data_list_ and relaxation_debug_check_.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method definitions.
(Layout::finalize): Support relaxation. Move section layout code to
Layout::relaxation_loop_body.
(Layout::set_asection_address_from_script): Move code for orphan
section placement out.
(Layout::place_orphan_sections_in_script): New method definition.
* layout.h (Output_segment_headers, Output_file_header):
New forward class declarations.
(Layout::~Layout): Define.
(Layout::new_output_section_data_from_script): New method definition.
(Layout::place_orphan_sections_in_script): New method declaration.
(Layout::Segment_states): New type declaration.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method declarations.
(Layout::Output_section_data_list): New type declaration.
(Layout::Relaxation_debug_check): New class definition.
(Layout::record_output_section_data_from_script_,
Layout::script_output_section_data_list_, Layout::segment_states_,
Layout::relaxation_debug_check_): New data members.
* output.cc: (Output_section_headers::do_size): New method definition.
(Output_section_headers::Output_section_headers): Move size
computation to Output_section_headers::do_size.
(Output_segment_headers::do_size): New method definition.
(Output_file_header::Output_file_header): Move size computation to
Output_file_header::do_size and call it.
(Output_file_header::do_size): New method definition.
(Output_data_group::Output_data_group): Adjust call to
Output_section_data.
(Output_data_dynamic::set_final_data_size): Add DT_NULL tag only once.
(Output_symtab_xindex::do_write): Add array bound check.
(Output_section::Input_section::print_to_mapfile): Handle
RELAXED_INPUT_SECTION_CODE.
(Output_section::Output_section): Initialize data member checkpoint_.
(Output_section::~Output_section): Delete checkpoint object pointed
by checkpoint_.
(Output_section::add_input_section): Always add an Input_section if
relaxing.
(Output_section::add_merge_input_section): Add assert.
(Output_section::relax_input_section): New method definition.
(Output_section::set_final_data_size): Set load address to zero for
an unallocated section.
(Output_section::do_address_and_file_offset_have_reset_values):
New method definition.
(Output_section::Input_section_sort_enty::Input_section_sort_enty):
Handle relaxed input section.
(Output_section::sort_attached_input_sections): Checkpoint input
section list lazily.
(Output_section::get_input_sections): Change type of input_sections to
list of Simple_input_section pointers. Checkpoint input section list
lazily. Also handle relaxed input sections.
(Output_section::add_input_section_for_script): Take a reference to
a Simple_input_section object instead of Relobj pointer and section
index as parameter. Handle relaxed input sections.
(Output_section::save_states, Output_section::restore_states): New
method definitions.
* output.h (Output_data::Output_data): Initialize is_data_size_fixed_.
(Output_data::is_data_size_fixed): New method definition.
(Output_data::reset_addresss_and_file_offset): Do not reset data size
if it is fixed.
(Output_data::address_and_file_offset_have_reset_values): New method
definition.
(Output_data::do_address_and_file_offset_have_reset_values): New method
definition.
(Output_data::set_data_size): Check that data size is not fixed.
(Output_data::fix_data_size): New method definition.
(Output_data::is_data_size_fixed_): New data member.
(Output_section_headers::set_final_data_size): New method definition.
(Output_section_headers::do_size): New method declaration.
(Output_segment_headers::set_final_data_size): New method definition.
(Output_segment_headers::do_size): New method declaration.
(Output_file_header::set_final_data_size)::New method definition.
(Output_file_header::do_size)::New method declaration.
(Output_section_data::Output_section_data): Add new parameter
is_data_size_fixed and use it to fix data size.
(Output_data_const::Output_data_const): Adjust call to base class
constructor and fix data size.
(Output_data_const_buffer::Output_data_const_buffer): Adjust call to
base class constructor and fix data size.
(Output_data_fixed_space::Output_data_fixed_space): Adjust call to
base class constructor and fix data size.
(Output_data_zero_fill::Output_data_zero_fill): Adjust call to base
class constructor and fix data size.
(Output_data_group::set_final_data_size): New method definition.
(Output_data_dynamic::Dynamic_entry::tag): New method definition.
(Output_symtab_xindex::Output_symtab_xindex): Adjust call to base
class constructor and fix data size.
(Output_relaxed_input_section): New class definition.
(Output_section::Simple_input_section): New class definition.
(Output_section::get_input_sections): Adjust parameter list.
(Output_section::add_input_section_for_script): Same.
(Output_section::save_states, Output_section::restore_states,
Output_section::do_address_and_file_offset_have_reset_values,
(Output_section::Input_section::Input_section): Handle
RELAXED_INPUT_SECTION_CODE. Add new overload for
Output_relaxed_input_section.
(Output_section::Input_section::is_input_section,
Output_section::Input_section::set_output_section): Handle relaxed
input section.
(Output_section::Input_section::is_relaxed_input_section,
Output_section::Input_section::output_section_data,
Output_section::Input_section::relaxed_input_section): New method
definitions.
(Output_section::Input_section::RELAXED_INPUT_SECTION_CODE): New enum
value.
(Output_section::Input_section::u1_): Update comments.
(Output_section::Input_section::u2_): Add new union member poris.
(Output_section::Checkpoint_output_section): New classs definition.
(Output_section::relax_input_section): New method declaration.
(Output_section::checkpoint_): New data member.
(Output_segment): Update comments.
(Output_segment::Output_segment): Un-privatize copy constructor.
(Output_segment::operator=): Un-privatize.
* script-sections.cc (Output_section_element::Input_section_list):
Change element type to Output_section::Simple_input_section.
(Output_section_element_dot_assignment::set_section_addresses):
Register output section data for relaxation clean up.
(Output_data_exression::Output_data_expression): Adjust call to base
constructor to fix data size.
(Output_section_element_data::set_section_addresses): Register
Output_data_expression object for relaxation clean up.
(struct Input_section_info): Replace Relobj pointer and section index
pair with Output_section::Simple_input_section and Convert struct to a
class.
(Input_section_sorter::operator()): Adjust access to
Input_section_info data member to use accessors.
(Output_section_element_input::set_section_addresses): Use layout
parameter. Adjust code to use Output_section::Simple_input_section
and Input_secction_info classes. Register filler for relaxation
clean up.
(Orphan_output_section::set_section_addresses): Replace Relobj pointer
and section index pair with Output_section::Simple_input_section
class. Adjust code accordingly.
(Phdrs_element::release_segment): New method definition.
(Script_sections::attach_sections_using_phdrs_clause): Do not modify
segment list.
(Script_sections::release_segments): New method definition.
* gold/script-sections.h (Script_sections::release_segments): New
method declaration.
* gold/target.h (Target::may_relax, Target::relax,
Target::do_may_relax, Target::do_relax): New method definitions.
2009-09-18 03:10:38 +02:00
|
|
|
typedef std::vector<Output_section_data*> Output_section_data_list;
|
|
|
|
|
|
|
|
// Debug checker class.
|
|
|
|
class Relaxation_debug_check
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
Relaxation_debug_check()
|
|
|
|
: section_infos_()
|
|
|
|
{ }
|
|
|
|
|
|
|
|
// Check that sections and special data are in reset states.
|
|
|
|
void
|
|
|
|
check_output_data_for_reset_values(const Layout::Section_list&,
|
|
|
|
const Layout::Data_list&);
|
|
|
|
|
|
|
|
// Record information of a section list.
|
|
|
|
void
|
|
|
|
read_sections(const Layout::Section_list&);
|
|
|
|
|
|
|
|
// Verify a section list with recorded information.
|
|
|
|
void
|
|
|
|
verify_sections(const Layout::Section_list&);
|
|
|
|
|
|
|
|
private:
|
|
|
|
// Information we care about a section.
|
|
|
|
struct Section_info
|
|
|
|
{
|
|
|
|
// Output section described by this.
|
|
|
|
Output_section* output_section;
|
|
|
|
// Load address.
|
|
|
|
uint64_t address;
|
|
|
|
// Data size.
|
|
|
|
off_t data_size;
|
|
|
|
// File offset.
|
|
|
|
off_t offset;
|
|
|
|
};
|
|
|
|
|
|
|
|
// Section information.
|
|
|
|
std::vector<Section_info> section_infos_;
|
|
|
|
};
|
|
|
|
|
2009-04-02 06:19:03 +02:00
|
|
|
// The number of input files, for sizing tables.
|
|
|
|
int number_of_input_files_;
|
2008-01-09 20:57:45 +01:00
|
|
|
// Information set by scripts or by command line options.
|
|
|
|
Script_options* script_options_;
|
2006-09-22 00:13:18 +02:00
|
|
|
// The output section names.
|
|
|
|
Stringpool namepool_;
|
2006-09-28 00:53:42 +02:00
|
|
|
// The output symbol names.
|
|
|
|
Stringpool sympool_;
|
2006-11-29 18:56:40 +01:00
|
|
|
// The dynamic strings, if needed.
|
|
|
|
Stringpool dynpool_;
|
2006-09-22 00:13:18 +02:00
|
|
|
// The list of group sections and linkonce sections which we have seen.
|
|
|
|
Signatures signatures_;
|
|
|
|
// The mapping from input section name/type/flags to output sections.
|
|
|
|
Section_name_map section_name_map_;
|
|
|
|
// The list of output segments.
|
|
|
|
Segment_list segment_list_;
|
2006-11-29 18:56:40 +01:00
|
|
|
// The list of output sections.
|
|
|
|
Section_list section_list_;
|
2006-09-22 00:13:18 +02:00
|
|
|
// The list of output sections which are not attached to any output
|
|
|
|
// segment.
|
2006-11-29 18:56:40 +01:00
|
|
|
Section_list unattached_section_list_;
|
|
|
|
// The list of unattached Output_data objects which require special
|
|
|
|
// handling because they are not Output_sections.
|
2006-09-29 21:58:17 +02:00
|
|
|
Data_list special_output_list_;
|
2007-11-29 21:10:17 +01:00
|
|
|
// The section headers.
|
|
|
|
Output_section_headers* section_headers_;
|
2006-10-20 22:40:49 +02:00
|
|
|
// A pointer to the PT_TLS segment if there is one.
|
|
|
|
Output_segment* tls_segment_;
|
2008-05-20 06:00:47 +02:00
|
|
|
// A pointer to the PT_GNU_RELRO segment if there is one.
|
|
|
|
Output_segment* relro_segment_;
|
2006-11-29 18:56:40 +01:00
|
|
|
// The SHT_SYMTAB output section.
|
|
|
|
Output_section* symtab_section_;
|
2008-04-19 20:30:58 +02:00
|
|
|
// The SHT_SYMTAB_SHNDX for the regular symbol table if there is one.
|
|
|
|
Output_symtab_xindex* symtab_xindex_;
|
2006-11-29 18:56:40 +01:00
|
|
|
// The SHT_DYNSYM output section if there is one.
|
|
|
|
Output_section* dynsym_section_;
|
2008-04-19 20:30:58 +02:00
|
|
|
// The SHT_SYMTAB_SHNDX for the dynamic symbol table if there is one.
|
|
|
|
Output_symtab_xindex* dynsym_xindex_;
|
2006-11-29 18:56:40 +01:00
|
|
|
// The SHT_DYNAMIC output section if there is one.
|
|
|
|
Output_section* dynamic_section_;
|
2006-12-01 17:51:25 +01:00
|
|
|
// The dynamic data which goes into dynamic_section_.
|
|
|
|
Output_data_dynamic* dynamic_data_;
|
2007-11-09 08:00:15 +01:00
|
|
|
// The exception frame output section if there is one.
|
2007-09-26 07:44:38 +02:00
|
|
|
Output_section* eh_frame_section_;
|
2007-11-09 08:00:15 +01:00
|
|
|
// The exception frame data for eh_frame_section_.
|
|
|
|
Eh_frame* eh_frame_data_;
|
2008-04-09 02:26:48 +02:00
|
|
|
// Whether we have added eh_frame_data_ to the .eh_frame section.
|
|
|
|
bool added_eh_frame_data_;
|
2007-11-09 08:00:15 +01:00
|
|
|
// The exception frame header output section if there is one.
|
|
|
|
Output_section* eh_frame_hdr_section_;
|
* options.h (class General_options): Define build_id option.
* layout.h (class Layout): Declare write_build_id, create_note,
create_build_id. Add build_id_note_ member.
* layout.cc: Include <cerrno>, <fcntl.h>, <unistd.h>,
"libiberty.h", "md5.h", "sha1.h".
(Layout::Layout): Initialize eh_frame_data_,
eh_frame_hdr_section_, and build_id_note_.
(Layout::finalize): Call create_build_id.
(Layout::create_note): New function, broken out of
Layout::create_gold_note.
(Layout::create_gold_note): Call create_note.
(Layout::create_build_id): New function.
(Layout::write_build_id): New function.
(Close_task_runner::run): Call write_build_id.
2008-03-25 06:11:41 +01:00
|
|
|
// The space for the build ID checksum if there is one.
|
|
|
|
Output_section_data* build_id_note_;
|
2008-05-28 22:48:16 +02:00
|
|
|
// The output section containing dwarf abbreviations
|
|
|
|
Output_reduced_debug_abbrev_section* debug_abbrev_;
|
|
|
|
// The output section containing the dwarf debug info tree
|
|
|
|
Output_reduced_debug_info_section* debug_info_;
|
2008-02-06 20:32:32 +01:00
|
|
|
// A list of group sections and their signatures.
|
|
|
|
Group_signatures group_signatures_;
|
2007-10-12 07:51:25 +02:00
|
|
|
// The size of the output file.
|
|
|
|
off_t output_file_size_;
|
2009-04-02 06:19:03 +02:00
|
|
|
// Whether we have attached the sections to the segments.
|
|
|
|
bool sections_are_attached_;
|
2007-10-23 07:05:48 +02:00
|
|
|
// Whether we have seen an object file marked to require an
|
|
|
|
// executable stack.
|
|
|
|
bool input_requires_executable_stack_;
|
|
|
|
// Whether we have seen at least one object file with an executable
|
|
|
|
// stack marker.
|
|
|
|
bool input_with_gnu_stack_note_;
|
|
|
|
// Whether we have seen at least one object file without an
|
|
|
|
// executable stack marker.
|
|
|
|
bool input_without_gnu_stack_note_;
|
2007-12-12 00:30:52 +01:00
|
|
|
// Whether we have seen an object file that uses the static TLS model.
|
|
|
|
bool has_static_tls_;
|
2007-12-14 20:00:21 +01:00
|
|
|
// Whether any sections require postprocessing.
|
|
|
|
bool any_postprocessing_sections_;
|
2009-04-02 06:19:03 +02:00
|
|
|
// Whether we have resized the signatures_ hash table.
|
|
|
|
bool resized_signatures_;
|
2009-06-24 02:38:00 +02:00
|
|
|
// Whether we have created a .stab*str output section.
|
|
|
|
bool have_stabstr_section_;
|
2009-04-24 17:44:02 +02:00
|
|
|
// In incremental build, holds information check the inputs and build the
|
|
|
|
// .gnu_incremental_inputs section.
|
|
|
|
Incremental_inputs* incremental_inputs_;
|
2009-09-17 Doug Kwan <dougkwan@google.com>
* debug.h (DEBUG_RELAXATION): New constant.
(DEBUG_ALL): Add DEBUG_RELAXATION.
(debug_string_to_enum): Add relaxation debug option.
* layout.cc
(Layout::Relaxation_debug_check::check_output_data_for_reset_values,
Layout::Relaxation_debug_check::read_sections,
Layout::Relaxation_debug_check::read_sections): New method definitions.
(Layout::Layout): Initialize data members
record_output_section_data_from_scrips_,
script_output_section_data_list_ and relaxation_debug_check_.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method definitions.
(Layout::finalize): Support relaxation. Move section layout code to
Layout::relaxation_loop_body.
(Layout::set_asection_address_from_script): Move code for orphan
section placement out.
(Layout::place_orphan_sections_in_script): New method definition.
* layout.h (Output_segment_headers, Output_file_header):
New forward class declarations.
(Layout::~Layout): Define.
(Layout::new_output_section_data_from_script): New method definition.
(Layout::place_orphan_sections_in_script): New method declaration.
(Layout::Segment_states): New type declaration.
(Layout::save_segments, Layout::restore_segments,
Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation,
Layout::relaxation_loop_body): New method declarations.
(Layout::Output_section_data_list): New type declaration.
(Layout::Relaxation_debug_check): New class definition.
(Layout::record_output_section_data_from_script_,
Layout::script_output_section_data_list_, Layout::segment_states_,
Layout::relaxation_debug_check_): New data members.
* output.cc: (Output_section_headers::do_size): New method definition.
(Output_section_headers::Output_section_headers): Move size
computation to Output_section_headers::do_size.
(Output_segment_headers::do_size): New method definition.
(Output_file_header::Output_file_header): Move size computation to
Output_file_header::do_size and call it.
(Output_file_header::do_size): New method definition.
(Output_data_group::Output_data_group): Adjust call to
Output_section_data.
(Output_data_dynamic::set_final_data_size): Add DT_NULL tag only once.
(Output_symtab_xindex::do_write): Add array bound check.
(Output_section::Input_section::print_to_mapfile): Handle
RELAXED_INPUT_SECTION_CODE.
(Output_section::Output_section): Initialize data member checkpoint_.
(Output_section::~Output_section): Delete checkpoint object pointed
by checkpoint_.
(Output_section::add_input_section): Always add an Input_section if
relaxing.
(Output_section::add_merge_input_section): Add assert.
(Output_section::relax_input_section): New method definition.
(Output_section::set_final_data_size): Set load address to zero for
an unallocated section.
(Output_section::do_address_and_file_offset_have_reset_values):
New method definition.
(Output_section::Input_section_sort_enty::Input_section_sort_enty):
Handle relaxed input section.
(Output_section::sort_attached_input_sections): Checkpoint input
section list lazily.
(Output_section::get_input_sections): Change type of input_sections to
list of Simple_input_section pointers. Checkpoint input section list
lazily. Also handle relaxed input sections.
(Output_section::add_input_section_for_script): Take a reference to
a Simple_input_section object instead of Relobj pointer and section
index as parameter. Handle relaxed input sections.
(Output_section::save_states, Output_section::restore_states): New
method definitions.
* output.h (Output_data::Output_data): Initialize is_data_size_fixed_.
(Output_data::is_data_size_fixed): New method definition.
(Output_data::reset_addresss_and_file_offset): Do not reset data size
if it is fixed.
(Output_data::address_and_file_offset_have_reset_values): New method
definition.
(Output_data::do_address_and_file_offset_have_reset_values): New method
definition.
(Output_data::set_data_size): Check that data size is not fixed.
(Output_data::fix_data_size): New method definition.
(Output_data::is_data_size_fixed_): New data member.
(Output_section_headers::set_final_data_size): New method definition.
(Output_section_headers::do_size): New method declaration.
(Output_segment_headers::set_final_data_size): New method definition.
(Output_segment_headers::do_size): New method declaration.
(Output_file_header::set_final_data_size)::New method definition.
(Output_file_header::do_size)::New method declaration.
(Output_section_data::Output_section_data): Add new parameter
is_data_size_fixed and use it to fix data size.
(Output_data_const::Output_data_const): Adjust call to base class
constructor and fix data size.
(Output_data_const_buffer::Output_data_const_buffer): Adjust call to
base class constructor and fix data size.
(Output_data_fixed_space::Output_data_fixed_space): Adjust call to
base class constructor and fix data size.
(Output_data_zero_fill::Output_data_zero_fill): Adjust call to base
class constructor and fix data size.
(Output_data_group::set_final_data_size): New method definition.
(Output_data_dynamic::Dynamic_entry::tag): New method definition.
(Output_symtab_xindex::Output_symtab_xindex): Adjust call to base
class constructor and fix data size.
(Output_relaxed_input_section): New class definition.
(Output_section::Simple_input_section): New class definition.
(Output_section::get_input_sections): Adjust parameter list.
(Output_section::add_input_section_for_script): Same.
(Output_section::save_states, Output_section::restore_states,
Output_section::do_address_and_file_offset_have_reset_values,
(Output_section::Input_section::Input_section): Handle
RELAXED_INPUT_SECTION_CODE. Add new overload for
Output_relaxed_input_section.
(Output_section::Input_section::is_input_section,
Output_section::Input_section::set_output_section): Handle relaxed
input section.
(Output_section::Input_section::is_relaxed_input_section,
Output_section::Input_section::output_section_data,
Output_section::Input_section::relaxed_input_section): New method
definitions.
(Output_section::Input_section::RELAXED_INPUT_SECTION_CODE): New enum
value.
(Output_section::Input_section::u1_): Update comments.
(Output_section::Input_section::u2_): Add new union member poris.
(Output_section::Checkpoint_output_section): New classs definition.
(Output_section::relax_input_section): New method declaration.
(Output_section::checkpoint_): New data member.
(Output_segment): Update comments.
(Output_segment::Output_segment): Un-privatize copy constructor.
(Output_segment::operator=): Un-privatize.
* script-sections.cc (Output_section_element::Input_section_list):
Change element type to Output_section::Simple_input_section.
(Output_section_element_dot_assignment::set_section_addresses):
Register output section data for relaxation clean up.
(Output_data_exression::Output_data_expression): Adjust call to base
constructor to fix data size.
(Output_section_element_data::set_section_addresses): Register
Output_data_expression object for relaxation clean up.
(struct Input_section_info): Replace Relobj pointer and section index
pair with Output_section::Simple_input_section and Convert struct to a
class.
(Input_section_sorter::operator()): Adjust access to
Input_section_info data member to use accessors.
(Output_section_element_input::set_section_addresses): Use layout
parameter. Adjust code to use Output_section::Simple_input_section
and Input_secction_info classes. Register filler for relaxation
clean up.
(Orphan_output_section::set_section_addresses): Replace Relobj pointer
and section index pair with Output_section::Simple_input_section
class. Adjust code accordingly.
(Phdrs_element::release_segment): New method definition.
(Script_sections::attach_sections_using_phdrs_clause): Do not modify
segment list.
(Script_sections::release_segments): New method definition.
* gold/script-sections.h (Script_sections::release_segments): New
method declaration.
* gold/target.h (Target::may_relax, Target::relax,
Target::do_may_relax, Target::do_relax): New method definitions.
2009-09-18 03:10:38 +02:00
|
|
|
// Whether we record output section data created in script
|
|
|
|
bool record_output_section_data_from_script_;
|
|
|
|
// List of output data that needs to be removed at relexation clean up.
|
|
|
|
Output_section_data_list script_output_section_data_list_;
|
|
|
|
// Structure to save segment states before entering the relaxation loop.
|
|
|
|
Segment_states* segment_states_;
|
|
|
|
// A relaxation debug checker. We only create one when in debugging mode.
|
|
|
|
Relaxation_debug_check* relaxation_debug_check_;
|
2006-09-29 21:58:17 +02:00
|
|
|
};
|
|
|
|
|
2007-11-09 08:00:15 +01:00
|
|
|
// This task handles writing out data in output sections which is not
|
|
|
|
// part of an input section, or which requires special handling. When
|
|
|
|
// this is done, it unblocks both output_sections_blocker and
|
|
|
|
// final_blocker.
|
|
|
|
|
|
|
|
class Write_sections_task : public Task
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
Write_sections_task(const Layout* layout, Output_file* of,
|
|
|
|
Task_token* output_sections_blocker,
|
|
|
|
Task_token* final_blocker)
|
|
|
|
: layout_(layout), of_(of),
|
|
|
|
output_sections_blocker_(output_sections_blocker),
|
|
|
|
final_blocker_(final_blocker)
|
|
|
|
{ }
|
|
|
|
|
|
|
|
// The standard Task methods.
|
|
|
|
|
2007-12-14 20:00:21 +01:00
|
|
|
Task_token*
|
|
|
|
is_runnable();
|
2007-11-09 08:00:15 +01:00
|
|
|
|
2007-12-14 20:00:21 +01:00
|
|
|
void
|
|
|
|
locks(Task_locker*);
|
2007-11-09 08:00:15 +01:00
|
|
|
|
|
|
|
void
|
|
|
|
run(Workqueue*);
|
|
|
|
|
2007-11-22 01:05:51 +01:00
|
|
|
std::string
|
|
|
|
get_name() const
|
|
|
|
{ return "Write_sections_task"; }
|
|
|
|
|
2007-11-09 08:00:15 +01:00
|
|
|
private:
|
|
|
|
class Write_sections_locker;
|
|
|
|
|
|
|
|
const Layout* layout_;
|
|
|
|
Output_file* of_;
|
|
|
|
Task_token* output_sections_blocker_;
|
|
|
|
Task_token* final_blocker_;
|
|
|
|
};
|
|
|
|
|
2006-09-29 21:58:17 +02:00
|
|
|
// This task handles writing out data which is not part of a section
|
|
|
|
// or segment.
|
|
|
|
|
|
|
|
class Write_data_task : public Task
|
|
|
|
{
|
|
|
|
public:
|
2006-11-29 18:56:40 +01:00
|
|
|
Write_data_task(const Layout* layout, const Symbol_table* symtab,
|
2007-09-26 09:01:35 +02:00
|
|
|
Output_file* of, Task_token* final_blocker)
|
|
|
|
: layout_(layout), symtab_(symtab), of_(of), final_blocker_(final_blocker)
|
2006-09-29 21:58:17 +02:00
|
|
|
{ }
|
|
|
|
|
|
|
|
// The standard Task methods.
|
|
|
|
|
2007-12-14 20:00:21 +01:00
|
|
|
Task_token*
|
|
|
|
is_runnable();
|
2006-09-29 21:58:17 +02:00
|
|
|
|
2007-12-14 20:00:21 +01:00
|
|
|
void
|
|
|
|
locks(Task_locker*);
|
2006-09-29 21:58:17 +02:00
|
|
|
|
|
|
|
void
|
|
|
|
run(Workqueue*);
|
|
|
|
|
2007-11-22 01:05:51 +01:00
|
|
|
std::string
|
|
|
|
get_name() const
|
|
|
|
{ return "Write_data_task"; }
|
|
|
|
|
2006-09-29 21:58:17 +02:00
|
|
|
private:
|
|
|
|
const Layout* layout_;
|
2006-11-29 18:56:40 +01:00
|
|
|
const Symbol_table* symtab_;
|
2006-09-29 21:58:17 +02:00
|
|
|
Output_file* of_;
|
|
|
|
Task_token* final_blocker_;
|
|
|
|
};
|
|
|
|
|
|
|
|
// This task handles writing out the global symbols.
|
|
|
|
|
|
|
|
class Write_symbols_task : public Task
|
|
|
|
{
|
|
|
|
public:
|
2008-04-19 20:30:58 +02:00
|
|
|
Write_symbols_task(const Layout* layout, const Symbol_table* symtab,
|
2007-11-14 17:53:25 +01:00
|
|
|
const Input_objects* input_objects,
|
2006-12-01 17:51:25 +01:00
|
|
|
const Stringpool* sympool, const Stringpool* dynpool,
|
|
|
|
Output_file* of, Task_token* final_blocker)
|
2008-04-19 20:30:58 +02:00
|
|
|
: layout_(layout), symtab_(symtab), input_objects_(input_objects),
|
|
|
|
sympool_(sympool), dynpool_(dynpool), of_(of),
|
|
|
|
final_blocker_(final_blocker)
|
2006-09-29 21:58:17 +02:00
|
|
|
{ }
|
|
|
|
|
|
|
|
// The standard Task methods.
|
|
|
|
|
2007-12-14 20:00:21 +01:00
|
|
|
Task_token*
|
|
|
|
is_runnable();
|
2006-09-29 21:58:17 +02:00
|
|
|
|
2007-12-14 20:00:21 +01:00
|
|
|
void
|
|
|
|
locks(Task_locker*);
|
2006-09-29 21:58:17 +02:00
|
|
|
|
|
|
|
void
|
|
|
|
run(Workqueue*);
|
|
|
|
|
2007-11-22 01:05:51 +01:00
|
|
|
std::string
|
|
|
|
get_name() const
|
|
|
|
{ return "Write_symbols_task"; }
|
|
|
|
|
2006-09-29 21:58:17 +02:00
|
|
|
private:
|
2008-04-19 20:30:58 +02:00
|
|
|
const Layout* layout_;
|
2006-09-29 21:58:17 +02:00
|
|
|
const Symbol_table* symtab_;
|
2007-11-14 17:53:25 +01:00
|
|
|
const Input_objects* input_objects_;
|
2006-09-29 21:58:17 +02:00
|
|
|
const Stringpool* sympool_;
|
2006-12-01 17:51:25 +01:00
|
|
|
const Stringpool* dynpool_;
|
2006-09-29 21:58:17 +02:00
|
|
|
Output_file* of_;
|
|
|
|
Task_token* final_blocker_;
|
|
|
|
};
|
|
|
|
|
2007-11-09 08:00:15 +01:00
|
|
|
// This task handles writing out data in output sections which can't
|
|
|
|
// be written out until all the input sections have been handled.
|
|
|
|
// This is for sections whose contents is based on the contents of
|
|
|
|
// other output sections.
|
|
|
|
|
|
|
|
class Write_after_input_sections_task : public Task
|
|
|
|
{
|
|
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public:
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2007-11-29 21:10:17 +01:00
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Write_after_input_sections_task(Layout* layout, Output_file* of,
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2007-11-09 08:00:15 +01:00
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Task_token* input_sections_blocker,
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Task_token* final_blocker)
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: layout_(layout), of_(of),
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input_sections_blocker_(input_sections_blocker),
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final_blocker_(final_blocker)
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{ }
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// The standard Task methods.
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2007-12-14 20:00:21 +01:00
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Task_token*
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is_runnable();
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2007-11-09 08:00:15 +01:00
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2007-12-14 20:00:21 +01:00
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void
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locks(Task_locker*);
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2007-11-09 08:00:15 +01:00
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void
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run(Workqueue*);
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2007-11-22 01:05:51 +01:00
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std::string
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get_name() const
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{ return "Write_after_input_sections_task"; }
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2007-11-09 08:00:15 +01:00
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private:
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2007-11-29 21:10:17 +01:00
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Layout* layout_;
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2007-11-09 08:00:15 +01:00
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Output_file* of_;
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Task_token* input_sections_blocker_;
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Task_token* final_blocker_;
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};
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2006-10-20 22:40:49 +02:00
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// This task function handles closing the file.
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2006-09-29 21:58:17 +02:00
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2006-10-20 22:40:49 +02:00
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class Close_task_runner : public Task_function_runner
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2006-09-29 21:58:17 +02:00
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{
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public:
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2008-02-07 08:33:46 +01:00
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Close_task_runner(const General_options* options, const Layout* layout,
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Output_file* of)
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: options_(options), layout_(layout), of_(of)
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2006-09-29 21:58:17 +02:00
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{ }
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2006-10-20 22:40:49 +02:00
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// Run the operation.
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2006-09-29 21:58:17 +02:00
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void
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2007-12-14 20:00:21 +01:00
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run(Workqueue*, const Task*);
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2006-09-29 21:58:17 +02:00
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private:
|
2008-02-07 08:33:46 +01:00
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const General_options* options_;
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const Layout* layout_;
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2006-09-29 21:58:17 +02:00
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Output_file* of_;
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2006-09-22 00:13:18 +02:00
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};
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2006-11-03 19:26:11 +01:00
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// A small helper function to align an address.
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inline uint64_t
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align_address(uint64_t address, uint64_t addralign)
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{
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if (addralign != 0)
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address = (address + addralign - 1) &~ (addralign - 1);
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return address;
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}
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2006-09-22 00:13:18 +02:00
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} // End namespace gold.
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#endif // !defined(GOLD_LAYOUT_H)
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