* 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, 16 insertions, 0 deletions

diff --git a/gold/dwarf_reader.cc b/gold/dwarf_reader.cc
index 4062fe6..c0188fb 100644
--- a/gold/dwarf_reader.cc
+++ b/gold/dwarf_reader.cc
@@ -32,6 +32,7 @@
 #include "reloc.h"
 #include "dwarf_reader.h"
 #include "int_encoding.h"
+#include "compressed_output.h"
 
 namespace gold {
 
@@ -80,6 +81,21 @@ Sized_dwarf_line_info<size, big_endian>::Sized_dwarf_line_info(Object* object,
   if (this->buffer_ == NULL)
     return;
 
+  section_size_type uncompressed_size = 0;
+  unsigned char* uncompressed_data = NULL;
+  if (object->section_is_compressed(debug_shndx, &uncompressed_size))
+    {
+      uncompressed_data = new unsigned char[uncompressed_size];
+      if (!decompress_input_section(this->buffer_,
+				    this->buffer_end_ - this->buffer_,
+				    uncompressed_data,
+				    uncompressed_size))
+	object->error(_("could not decompress section %s"),
+		      object->section_name(debug_shndx).c_str());
+      this->buffer_ = uncompressed_data;
+      this->buffer_end_ = this->buffer_ + uncompressed_size;
+    }
+
   // Find the relocation section for ".debug_line".
   // We expect these for relobjs (.o's) but not dynobjs (.so's).
   bool got_relocs = false;