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Re: [PATCH][GOLD] Add support for relaxation.


"Doug Kwan (éæå)" <dougkwan@google.com> writes:

> 2009-09-16  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.


> +// Save information of SECTIONS to checking later.

s/to/for/ I think.

This is OK.

Thanks.

Ian


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