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.

1 files changed, 53 insertions, 20 deletions

diff --git a/gold/object.h b/gold/object.h
index bbc1a10..66f5dbb 100644
--- a/gold/object.h
+++ b/gold/object.h
@@ -1324,7 +1324,8 @@ class Sized_relobj : public Relobj
 
   // Set up the object file based on TARGET.
   void
-  setup();
+  setup()
+  { this->do_setup(); }
 
   // Return the number of symbols.  This is only valid after
   // Object::add_symbols has been called.
@@ -1462,7 +1463,16 @@ class Sized_relobj : public Relobj
   Address
   map_to_kept_section(unsigned int shndx, bool* found) const;
 
+  // Make section offset invalid.  This is needed for relaxation.
+  void
+  invalidate_section_offset(unsigned int shndx)
+  { this->do_invalidate_section_offset(shndx); }
+
  protected:
+  // Set up.
+  virtual void
+  do_setup();
+
   // Read the symbols.
   void
   do_read_symbols(Read_symbols_data*);
@@ -1596,6 +1606,48 @@ class Sized_relobj : public Relobj
     this->section_offsets_[shndx] = convert_types<Address, uint64_t>(off);
   }
 
+  // Set the offset of a section to invalid_address.
+  virtual void
+  do_invalidate_section_offset(unsigned int shndx)
+  {
+    gold_assert(shndx < this->section_offsets_.size());
+    this->section_offsets_[shndx] = invalid_address;
+  }
+
+  // Adjust a section index if necessary.
+  unsigned int
+  adjust_shndx(unsigned int shndx)
+  {
+    if (shndx >= elfcpp::SHN_LORESERVE)
+      shndx += this->elf_file_.large_shndx_offset();
+    return shndx;
+  }
+
+  // Initialize input to output maps for section symbols in merged
+  // sections.
+  void
+  initialize_input_to_output_maps();
+
+  // Free the input to output maps for section symbols in merged
+  // sections.
+  void
+  free_input_to_output_maps();
+
+  // Return symbol table section index.
+  unsigned int
+  symtab_shndx() const
+  { return this->symtab_shndx_; }
+
+  // Allow a child class to access the ELF file.
+  elfcpp::Elf_file<size, big_endian, Object>*
+  elf_file()
+  { return &this->elf_file_; }
+  
+  // Allow a child class to access the local values.
+  Local_values*
+  local_values()
+  { return &this->local_values_; }
+
  private:
   // For convenience.
   typedef Sized_relobj<size, big_endian> This;
@@ -1618,15 +1670,6 @@ class Sized_relobj : public Relobj
   typedef std::map<unsigned int, Kept_comdat_section>
       Kept_comdat_section_table;
 
-  // Adjust a section index if necessary.
-  unsigned int
-  adjust_shndx(unsigned int shndx)
-  {
-    if (shndx >= elfcpp::SHN_LORESERVE)
-      shndx += this->elf_file_.large_shndx_offset();
-    return shndx;
-  }
-
   // Find the SHT_SYMTAB section, given the section headers.
   void
   find_symtab(const unsigned char* pshdrs);
@@ -1742,16 +1785,6 @@ class Sized_relobj : public Relobj
   find_functions(const unsigned char* pshdrs, unsigned int shndx,
 		 Function_offsets*);
 
-  // Initialize input to output maps for section symbols in merged
-  // sections.
-  void
-  initialize_input_to_output_maps();
-
-  // Free the input to output maps for section symbols in merged
-  // sections.
-  void
-  free_input_to_output_maps();
-
   // Write out the local symbols.
   void
   write_local_symbols(Output_file*,