[GOLD][PATCH] Support NOLOAD section type in scripts.

[Ian Lance Taylor]

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

> 2010-04-09  Doug Kwan  <dougkwan@google.com>
>
>         * layout.cc (Layout::choose_output_section): Handle script section
>         types.
>         (Layout::make_output_section_for_script): Add section type parameter.
>         Handle script section types.
>         * layout.h (Layout::make_output_section_for_script): Add section
>         type parameter.
>         * output.cc (Output_section::Output_section): Initialize data member
>         is_noload_.
>         (Output_section::do_reset_address_and_file_offset): Do not set address
>         to 0 if section is a NOLOAD section.
>         * output.h (Output_section::is_noload): New method.
>         (Output_section::set_is_noload): Ditto.
>         (Output_section::is_noload_): New data member.
>         * script-c.h (Script_section_type): New enum type.
>         (struct Parser_output_section_header): Add new file section_type.
>         * script-sections.cc (Sections_element::output_section_name): Add
>         parameter for returning script section type.
>         (Output_section_definition::output_section_name): Ditto.
>         (Output_section_definition::section_type)P; New method.
>         (Output_section_definiton::script_section_type_name): Ditto.
>         (Output_section_definition::script_section_type_): New data member.
>         (Output_section_definition::Output_section_definition): Initialize
>         data member Output_section_definition::script_section_type_.
>         (Output_section_definition::create_sections): Pass script section type
>         to Layout::make_output_section_for_script.
>         (Output_section_definition::output_section_name): Return script
>         section type to caller.
>         (Output_section_definition::set_section_address): Do not advance
>         dot value and load address if section type is NOLOAD.  Set address
>         of NOLOAD sections regardless of section flags.
>         (Output_section_definition::print): Print section type if it is
>         not SCRIPT_SECTION_TYPE_NONE.
>         (Output_section_definition::section_type): New method.
>         (Output_section_definition::script_section_type_name): Ditto.
>         (Script_sections::output_section_name): Add new parameter
>         PSECTION_TYPE for returning script section type.  Pass it to
>         section elements.  Handle discard sections.
>         (Sort_output_sections::operator()): Handle NOLOAD sections.
>         * script-sections.h (Script_sections::Section_type): New enum type.
>         (Script_sections::output_section_name): Add a new parameter for
>         returning script section type.
>         * script.cc (script_keyword_parsecodes): Add keywords COPY, DSECT,
>         INFO and NOLOAD.
>         * yyscript.y (union): Add new field SECTION_TYPE.
>         (COPY, DSECT, INFO, NOLOAD): New tokens.
>         (opt_address_and_section_type): Change type to output_section_header.
>         (section_type): New non-terminal
>         (section_header): Handle section type.
>         (opt_address_and_section_type): Return section type value.



> +      // If this is a NOLOAD section, key dot and load address unchanged.
> +      if (this->output_section_->is_noload())
> +	{
> +	  *dot_value = old_dot_value;
> +	  *load_address = old_load_address;
> +	}

s/key/keep/


This is OK with that change.

Thanks for tackling this.

Ian