[GOLD][PATCH]Handle script sections in Output_section::get_input_section.

[H.J. Lu]

On Thu, May 20, 2010 at 6:52 PM, Doug Kwan (關振德) <dougkwan@google.com> wrote:
> This patch add support for exporting and re-importing merge sections
> Output_section class, as discussed earlier.  All merged input sections
> of the same properties are exported together in a merge object, which
> is treated as the first merge input section in a sections script.  The
> maps for looking up merge and relaxed sections in Output_sections are
> refactored into a separate class Output_section_lookup_maps.  The
> patch also fixes two issues in arm.cc.
>
> This was tested on x86_64 and ARM, both natively.
>
> -Doug
>
>
>
> 2010-05-21  Doug Kwan  <dougkwan@google.com>
>
>        * arm.cc (Arm_input_section::do_output_offset): Add a cast to
>        avoid a compilation error.
>        (Target_arm::apply_cortex_a8_workaround): Rewrite a conditional branch
>        with a direct branch, not a conditional branch, to a stub.
>        * merge.cc (Output_merge_base::record_input_section): New method
>        defintion.
>        (Output_merge_data::do_add_input_section): Record input section if
>        keeps-input-sections flag is set.
>        (Output_merge_string::do_add_input_section): Ditto.
>        * merge.h (Output_merge_base::Output_merge_base): Initialize new data
>        members KEEPS_INPUT_SECTIONS_, FIRST_RELOBJ_, FIRST_SHNDX_ and
>        INPUT_SECTIONS_.
>        (Output_merge_base::keeps_input_sections,
>        Output_merge_base::set_keeps_input_sections,
>        Output_merge_base::first_relobj, Output_merge_base::first_shndx): New
>        method definitions.
>        (Output_merge_base::Input_sections): New type declaration.
>        (Output_merge_base::input_sections_begin,
>        Output_merge_base::input_sections_end,
>        Output_merge_base::do_set_keeps_input_sections): New method definitions.
>        (Output_merge_base::bool keeps_input_sections_,
>        Output_merge_base::first_relobj_, Output_merge_base::first_shndx_,
>        Output_merge_base::input_sections_): New data members.
>        (Output_merge_data::do_set_keeps_input_sections): New method
>        defintion.
>        (Output_merge_string::do_set_keeps_input_sections): Ditto.
>        * output.cc (Output_section::Input_section::relobj): Move method
>        defintion from class declaration to here and handle merge sections.
>        (Output_section::Input_section::shndx): Ditto.
>        (Output_section::Output_section): Remove initializations of removed
>        data members and initialize new data member LOOKUP_MAPS_.
>        (Output_section::add_input_section): Set keeps-input-sections flag
>        for a newly created merge output section as appropriate.  Adjust code
>        to use Output_section_lookup_maps class.
>        (Output_section::add_relaxed_input_section): Adjst code for lookup
>        maps code refactoring.
>        (Output_section::add_merge_input_section): Add a new parameter
>        KEEPS_INPUT_SECTION.  Adjust code to use Output_section_lookup_maps
>        class.  If adding input section to a newly created merge output
>        section fails, remove the new merge section.
>        (Output_section::convert_input_sections_in_list_to_relaxed_input_sections):
>        Adjust code for use of the Output_section_lookup_maps class.
>        (Output_section::find_merge_section): Ditto.
>        (Output_section::build_lookup_maps): New method defintion.
>        (Output_section::find_relaxed_input_section): Adjust code to use
>        Output_section_lookup_maps class.
>        (Output_section::get_input_sections): Export merge sections.  Adjust
>        code to use Output_section_lookup_maps class.
>        (Output_section:::add_script_input_section): Adjust code to use
>        Output_section_lookup_maps class.  Update lookup maps for merge
>        sections also.
>        (Output_section::discard_states): Use Output_section_lookup_maps.
>        (Output_section::restore_states): Same.
>        * output.h (Merge_section_properties): Move class defintion out of
>        Output_section.
>        (Output_section_lookup_maps): New class.
>        (Output_section::Input_section::is_merge_section): New method
>        defintion.
>        (Output_section::Input_section::relobj): Move defintion out of class
>        defintion.  Declare method only.
>        (Output_section::Input_section::shndx): Ditto.
>        (Output_section::Input_section::output_merge_base): New method
> defintion.
>        (Output_section::Input_section::u2_.pomb): New union field.
>        (Output_section::Merge_section_by_properties_map,
>        Output_section::Output_section_data_by_input_section_map,
>        Output_section::Ouptut_relaxed_input_section_by_input_section_map):
>        Remove types.
>        (Output_section::add_merge_input_section): Add new parameter
>        KEEPS_INPUT_SECTIONS.
>        (Output_section::build_lookup_maps): New method declaration.
>        (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_): Remove data
>        members.
>        (Output_section::lookup_maps_): New data member.
>

Does this patch fix

http://sourceware.org/bugzilla/show_bug.cgi?id=11619

Gold failed to build on Linux/ia32.

-- 
H.J.