* compressed_output.cc (zlib_decompress): New function.

	(get_uncompressed_size): New function.
	(decompress_input_section): New function.
	* compressed_output.h (get_uncompressed_size): New function.
	(decompress_input_section): New function.
	* dwarf_reader.cc (Sized_dwarf_line_info::Sized_dwarf_line_info)
	Handle compressed debug sections.
	* layout.cc (is_compressed_debug_section): New function.
	(Layout::output_section_name): Map compressed section names to
	canonical names.
	* layout.h (is_compressed_debug_section): New function.
	(is_debug_info_section): Recognize compressed debug sections.
	* merge.cc: Include compressed_output.h.
	(Output_merge_data::do_add_input_section): Handle compressed
	debug sections.
	(Output_merge_string::do_add_input_section): Handle compressed
	debug sections.
	* object.cc: Include compressed_output.h.
	(Sized_relobj::Sized_relobj): Initialize new data members.
	(build_compressed_section_map): New function.
	(Sized_relobj::do_read_symbols): Handle compressed debug sections.
	* object.h (Object::section_is_compressed): New method.
	(Object::do_section_is_compressed): New method.
	(Sized_relobj::Compressed_section_map): New type.
	(Sized_relobj::do_section_is_compressed): New method.
	(Sized_relobj::compressed_sections_): New data member.
	* output.cc (Output_section::add_input_section): Handle compressed
	debug sections.
	* reloc.cc: Include compressed_output.h.
	(Sized_relobj::write_sections): Handle compressed debug sections.

1 files changed, 39 insertions, 1 deletions

diff --git a/gold/object.h b/gold/object.h
index bc2b558..f60d909 100644
--- a/gold/object.h
+++ b/gold/object.h
@@ -518,6 +518,13 @@ class Object
   set_no_export(bool value)
   { this->no_export_ = value; }
 
+  // Return TRUE if the section is a compressed debug section, and set
+  // *UNCOMPRESSED_SIZE to the size of the uncompressed data.
+  bool
+  section_is_compressed(unsigned int shndx,
+			section_size_type* uncompressed_size) const
+  { return this->do_section_is_compressed(shndx, uncompressed_size); }
+
  protected:
   // Returns NULL for Objects that are not plugin objects.  This method
   // is overridden in the Pluginobj class.
@@ -628,6 +635,12 @@ class Object
   bool
   handle_split_stack_section(const char* name);
 
+  // Return TRUE if the section is a compressed debug section, and set
+  // *UNCOMPRESSED_SIZE to the size of the uncompressed data.
+  virtual bool
+  do_section_is_compressed(unsigned int, section_size_type*) const
+  { return false; }
+
  private:
   // This class may not be copied.
   Object(const Object&);
@@ -1406,6 +1419,10 @@ class Reloc_symbol_changes
   std::vector<Symbol*> vec_;
 };
 
+// Type for mapping section index to uncompressed size.
+
+typedef std::map<unsigned int, section_size_type> Compressed_section_map;
+
 // A regular object file.  This is size and endian specific.
 
 template<int size, bool big_endian>
@@ -1781,7 +1798,26 @@ class Sized_relobj : public Relobj
   void
   set_output_local_symbol_count(unsigned int value)
   { this->output_local_symbol_count_ = value; }
-   
+
+  // Return TRUE if the section is a compressed debug section, and set
+  // *UNCOMPRESSED_SIZE to the size of the uncompressed data.
+  bool
+  do_section_is_compressed(unsigned int shndx,
+			   section_size_type* uncompressed_size) const
+  {
+    if (this->compressed_sections_ == NULL)
+      return false;
+    Compressed_section_map::const_iterator p =
+        this->compressed_sections_->find(shndx);
+    if (p != this->compressed_sections_->end())
+      {
+	if (uncompressed_size != NULL)
+	  *uncompressed_size = p->second;
+	return true;
+      }
+    return false;
+  }
+
  private:
   // For convenience.
   typedef Sized_relobj<size, big_endian> This;
@@ -2024,6 +2060,8 @@ class Sized_relobj : public Relobj
   std::vector<Deferred_layout> deferred_layout_;
   // The list of relocation sections whose layout was deferred.
   std::vector<Deferred_layout> deferred_layout_relocs_;
+  // For compressed debug sections, map section index to uncompressed size.
+  Compressed_section_map* compressed_sections_;
 };
 
 // A class to manage the list of all objects.