* dwarf_reader.cc (Sized_dwarf_line_info::Sized_dwarf_line_info):

Call Object::decompressed_section_contents.
	* dwarf_reader.h (Sized_dwarf_line_info::~Sized_dwarf_line_info):
	New dtor.
	(Sized_dwarf_line_info::buffer_start_): New data member.
	* merge.cc (Output_merge_data::do_add_input_section): Call
	Object::decompressed_section_contents.
	(Output_merge_string::do_add_input_section): Likewise.
	* object.cc (need_decompressed_section): New function.
	(build_compressed_section_map): Decompress sections needed later.
	(Sized_relobj_file::do_decompressed_section_contents): New function.
	(Sized_relobj_file::do_discard_decompressed_sections): New function.
	* object.h (Object::decompressed_section_contents): New function.
	(Object::discard_decompressed_sections): New function.
	(Object::do_decompressed_section_contents): New function.
	(Object::do_discard_decompressed_sections): New function.
	(Compressed_section_info): New type.
	(Compressed_section_map): Include decompressed section contents.
	(Sized_relobj_file::do_decompressed_section_contents): New function.
	(Sized_relobj_file::do_discard_decompressed_sections): New function.

gold/object.h

@@ -725,6 +725,20 @@ class Object
 			section_size_type* uncompressed_size) const
   { return this->do_section_is_compressed(shndx, uncompressed_size); }
 
+  // Return a view of the uncompressed contents of a section.  Set *PLEN
+  // to the size.  Set *IS_NEW to true if the contents need to be freed
+  // by the caller.
+  const unsigned char*
+  decompressed_section_contents(unsigned int shndx, section_size_type* plen,
+				bool* is_cached)
+  { return this->do_decompressed_section_contents(shndx, plen, is_cached); }
+
+  // Discard any buffers of decompressed sections.  This is done
+  // at the end of the Add_symbols task.
+  void
+  discard_decompressed_sections()
+  { this->do_discard_decompressed_sections(); }
+
   // Return the index of the first incremental relocation for symbol SYMNDX.
   unsigned int
   get_incremental_reloc_base(unsigned int symndx) const
@@ -892,6 +906,27 @@ class Object
   do_section_is_compressed(unsigned int, section_size_type*) const
   { return false; }
 
+  // Return a view of the decompressed contents of a section.  Set *PLEN
+  // to the size.  This default implementation simply returns the
+  // raw section contents and sets *IS_NEW to false to indicate
+  // that the contents do not need to be freed by the caller.
+  // This function must be overridden for any types of object files
+  // that might contain compressed sections.
+  virtual const unsigned char*
+  do_decompressed_section_contents(unsigned int shndx,
+				   section_size_type* plen,
+				   bool* is_new)
+  {
+    *is_new = false;
+    return this->section_contents(shndx, plen, false);
+  }
+
+  // Discard any buffers of decompressed sections.  This is done
+  // at the end of the Add_symbols task.
+  virtual void
+  do_discard_decompressed_sections()
+  { }
+
   // Return the index of the first incremental relocation for symbol SYMNDX--
   // implemented by child class.
   virtual unsigned int
@@ -1775,9 +1810,14 @@ class Reloc_symbol_changes
   std::vector<Symbol*> vec_;
 };
 
-// Type for mapping section index to uncompressed size.
+// Type for mapping section index to uncompressed size and contents.
 
-typedef std::map<unsigned int, section_size_type> Compressed_section_map;
+struct Compressed_section_info
+{
+  section_size_type size;
+  const unsigned char* contents;
+};
+typedef std::map<unsigned int, Compressed_section_info> Compressed_section_map;
 
 // Abstract base class for a regular object file, either a real object file
 // or an incremental (unchanged) object.  This is size and endian specific.
@@ -2319,12 +2359,25 @@ class Sized_relobj_file : public Sized_relobj<size, big_endian>
     if (p != this->compressed_sections_->end())
       {
 	if (uncompressed_size != NULL)
-	  *uncompressed_size = p->second;
+	  *uncompressed_size = p->second.size;
 	return true;
       }
     return false;
   }
 
+  // Return a view of the uncompressed contents of a section.  Set *PLEN
+  // to the size.  Set *IS_NEW to true if the contents need to be deleted
+  // by the caller.
+  const unsigned char*
+  do_decompressed_section_contents(unsigned int shndx,
+				   section_size_type* plen,
+				   bool* is_new);
+
+  // Discard any buffers of uncompressed sections.  This is done
+  // at the end of the Add_symbols task.
+  void
+  do_discard_decompressed_sections();
+
  private:
   // For convenience.
   typedef Sized_relobj_file<size, big_endian> This;
@@ -2609,7 +2662,8 @@ class Sized_relobj_file : public Sized_relobj<size, big_endian>
   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.
+  // For compressed debug sections, map section index to uncompressed size
+  // and contents.
   Compressed_section_map* compressed_sections_;
 };