* layout.cc (Layout::make_output_section): Call

	Target::new_output_section.
	(Layout::attach_allocated_section_to_segment): Put large section
	sections in a separate load segment with the large segment flag
	set.
	(Layout::segment_precedes): Sort large data segments after other
	load segments.
	(align_file_offset): New static function.
	(Layout::set_segment_offsets): Use align_file_offset.
	* output.h (class Output_section): Add is_small_section_ and
	is_large_section_ fields.
	(Output_section::is_small_section): New function.
	(Output_section::set_is_small_section):  New function.
	(Output_section::is_large_section): New function.
	(Output_section::set_is_large_section): New function.
	(Output_section::is_large_data_section): New function.
	(class Output_segment): Add is_large_data_segment_ field.
	(Output_segment::is_large_data_segment): New function.
	(Output_segment::set_is_large_data_segment): New function.
	* output.cc (Output_section::Output_section): Initialize new
	fields.
	(Output_segment::Output_segment): Likewise.
	(Output_segment::add_output_section): Add assertion that large
	data sections always go in large data segments.  Force small data
	sections to the end of the list of data sections.  Force small BSS
	sections to the start of the list of BSS sections.  For large BSS
	sections to the end of the list of BSS sections.
	* symtab.h (class Symbol): Declare is_common_shndx.
	(Symbol::is_defined): Check Symbol::is_common_shndx.
	(Symbol::is_common): Likewise.
	(class Symbol_table): Define enum Commons_section_type.  Update
	declarations.  Add small_commons_ and large_commons_ fields.
	* symtab.cc (Symbol::is_common_shndx): New function.
	(Symbol_table::Symbol_table): Initialize new fields.
	(Symbol_table::add_from_object): Put small and large common
	symbols in the right list.
	(Symbol_table::sized_finalized_symbol): Check
	Symbol::is_common_shndx.
	(Symbol_table::sized_write_globals): Likewise.
	* common.cc (Symbol_table::do_allocate_commons): Allocate new
	common symbol lists.  Don't call do_allocate_commons_list if the
	list is empty.
	(Symbol_table::do_allocate_commons_list): Remove is_tls
	parameter.  Add comons_section_type parameter.  Change all
	callers.  Handle small and large common symbols.
	* object.cc (Sized_relobj::do_finalize_local_symbols): Check
	Symbol::is_common_shndx.
	* resolve.cc (symbol_to_bits): Likewise.
	* target.h (Target::small_common_shndx): New function.
	(Target::small_common_section_flags): New function.
	(Target::large_common_shndx): New function.
	(Target::large_common_section_flags): New function.
	(Target::new_output_section): New function.
	(Target::Target_info): Add small_common_shndx, large_common_shndx,
	small_common_section_flags, and large_common_section_flags
	fields.
	(Target::do_new_output_section): New virtual function.
	* arm.cc (Target_arm::arm_info): Initialize new fields.
	* i386.cc (Target_i386::i386_info): Likewise.
	* powerpc.cc (Target_powerpc::powerpc_info) [all versions]:
	Likewise.
	* sparc.c (Target_sparc::sparc_info) [all versions]: Likewise.
	* x86_64.cc (Target_x86_64::x86_64_info): Likewise.
	(Target_x86_64::do_new_output_section): New function.
	* configure.ac: Define conditional MCMODEL_MEDIUM.
	* testsuite/Makefile.am (check_PROGRAMS): Add large.
	(large_SOURCES, large_CFLAGS, large_DEPENDENCIES): Define.
	(large_LDFLAGS): Define.
	* testsuite/large.c: New file.
	* testsuite/testfile.cc (Target_test::test_target_info):
	Initialize new fields.
	* configure, testsuite/Makefile.in: Rebuild.

1 files changed, 52 insertions, 0 deletions

diff --git a/gold/target.h b/gold/target.h
index 2a28105..597a4f9 100644
--- a/gold/target.h
+++ b/gold/target.h
@@ -141,6 +141,43 @@ class Target
   wrap_char() const
   { return this->pti_->wrap_char; }
 
+  // Return the special section index which indicates a small common
+  // symbol.  This will return SHN_UNDEF if there are no small common
+  // symbols.
+  elfcpp::Elf_Half
+  small_common_shndx() const
+  { return this->pti_->small_common_shndx; }
+
+  // Return values to add to the section flags for the section holding
+  // small common symbols.
+  elfcpp::Elf_Xword
+  small_common_section_flags() const
+  {
+    gold_assert(this->pti_->small_common_shndx != elfcpp::SHN_UNDEF);
+    return this->pti_->small_common_section_flags;
+  }
+
+  // Return the special section index which indicates a large common
+  // symbol.  This will return SHN_UNDEF if there are no large common
+  // symbols.
+  elfcpp::Elf_Half
+  large_common_shndx() const
+  { return this->pti_->large_common_shndx; }
+
+  // Return values to add to the section flags for the section holding
+  // large common symbols.
+  elfcpp::Elf_Xword
+  large_common_section_flags() const
+  {
+    gold_assert(this->pti_->large_common_shndx != elfcpp::SHN_UNDEF);
+    return this->pti_->large_common_section_flags;
+  }
+
+  // This hook is called when an output section is created.
+  void
+  new_output_section(Output_section* os) const
+  { this->do_new_output_section(os); }
+
   // This is called to tell the target to complete any sections it is
   // handling.  After this all sections must have their final size.
   void
@@ -210,6 +247,16 @@ class Target
     uint64_t abi_pagesize;
     // The common page size used by actual implementations.
     uint64_t common_pagesize;
+    // The special section index for small common symbols; SHN_UNDEF
+    // if none.
+    elfcpp::Elf_Half small_common_shndx;
+    // The special section index for large common symbols; SHN_UNDEF
+    // if none.
+    elfcpp::Elf_Half large_common_shndx;
+    // Section flags for small common section.
+    elfcpp::Elf_Xword small_common_section_flags;
+    // Section flags for large common section.
+    elfcpp::Elf_Xword large_common_section_flags;
   };
 
   Target(const Target_info* pti)
@@ -218,6 +265,11 @@ class Target
 
   // Virtual function which may be implemented by the child class.
   virtual void
+  do_new_output_section(Output_section*) const
+  { }
+
+  // Virtual function which may be implemented by the child class.
+  virtual void
   do_finalize_sections(Layout*)
   { }