2010-07-13 Doug Kwan <dougkwan@google.com>

2010-07-13  Doug Kwan  <dougkwan@google.com>

	* arm.cc (Arm_input_section::Arm_input_section): For a
	SHT_ARM_EXIDX section, always keeps the input sections.
	(Arm_input_section::set_exidx_section_link): New method.
	(Arm_exidx_input_section::Arm_exidx_input_section): Initialize
	has_errors_ to false.
	(Arm_exidx_input_section::has_errors,
	Arm_exidx_input_section::set_has_errors): New methods.
	(Arm_exidx_input_section::has_errors_): New data member.
	(Arm_relobj::get_exidx_shndx_list): New method.
	(Arm_output_section::append_text_sections_to_list): Do not skip
	section without SHF_EXECINSTR.
	(Arm_output_section::fix_exidx_coverage): Skip input sections with
	errors.
 	(Arm_relobj::make_exidx_input_section): Add new parameter for text
	section header.  Make error messages more verbose.  Check for
	a non-executable section linked to an EXIDX section.
	(Arm_relobj::do_read_symbols): Remove error checking, which has been
	moved to Arm_relobj::make_exidx_input_section.  Add an assertion to
	check that there is no deferred EXIDX section if we exit early.
	Instead of not making an EXIDX section in case of an error, make one
	and set the has_errors flag of it.
	(Target_arm::do_finalize_sections): Fix up links of EXIDX sections
	in a relocatable link.
	(Target_arm::do_relax): Look for the EXIDX output section instead of
	assuming that it is called .ARM.exidx.
 	(Target_arm::fix_exidx_coverage): Add a new parameter for input
	section list.  Do not check for SHF_EXECINSTR section flags but
	skip any input section with errors.
	* output.cc (Output_section::Output_section): Initialize
	always_keeps_input_sections_ to false.
	(Output_section::add_input_section): Check for
	always_keeps_input_sections_.
	*  output.h (Output_section::always_keeps_input_sections,
	Output_section::set_always_keeps_input_sections): New methods.
	(Output_section::always_keeps_input_sections): New data member.