* 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, 41 insertions, 2 deletions

diff --git a/gold/merge.cc b/gold/merge.cc
index 6e44ddd..ec11c90 100644
--- a/gold/merge.cc
+++ b/gold/merge.cc
@@ -1,6 +1,6 @@
 // merge.cc -- handle section merging for gold
 
-// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2010 Free Software Foundation, Inc.
 // Written by Ian Lance Taylor <iant@google.com>.
 
 // This file is part of gold.
@@ -26,6 +26,7 @@
 #include <algorithm>
 
 #include "merge.h"
+#include "compressed_output.h"
 
 namespace gold
 {
@@ -404,12 +405,29 @@ bool
 Output_merge_data::do_add_input_section(Relobj* object, unsigned int shndx)
 {
   section_size_type len;
+  section_size_type uncompressed_size = 0;
+  unsigned char* uncompressed_data = NULL;
   const unsigned char* p = object->section_contents(shndx, &len, false);
 
+  if (object->section_is_compressed(shndx, &uncompressed_size))
+    {
+      uncompressed_data = new unsigned char[uncompressed_size];
+      if (!decompress_input_section(p, len, uncompressed_data,
+				    uncompressed_size))
+	object->error(_("could not decompress section %s"),
+		      object->section_name(shndx).c_str());
+      p = uncompressed_data;
+      len = uncompressed_size;
+    }
+
   section_size_type entsize = convert_to_section_size_type(this->entsize());
 
   if (len % entsize != 0)
-    return false;
+    {
+      if (uncompressed_data != NULL)
+	delete[] uncompressed_data;
+      return false;
+    }
 
   this->input_count_ += len / entsize;
 
@@ -438,6 +456,9 @@ Output_merge_data::do_add_input_section(Relobj* object, unsigned int shndx)
   if (this->keeps_input_sections())
     record_input_section(object, shndx);
 
+  if (uncompressed_data != NULL)
+    delete[] uncompressed_data;
+
   return true;
 }
 
@@ -495,8 +516,21 @@ Output_merge_string<Char_type>::do_add_input_section(Relobj* object,
 						     unsigned int shndx)
 {
   section_size_type len;
+  section_size_type uncompressed_size = 0;
+  unsigned char* uncompressed_data = NULL;
   const unsigned char* pdata = object->section_contents(shndx, &len, false);
 
+  if (object->section_is_compressed(shndx, &uncompressed_size))
+    {
+      uncompressed_data = new unsigned char[uncompressed_size];
+      if (!decompress_input_section(pdata, len, uncompressed_data,
+				    uncompressed_size))
+	object->error(_("could not decompress section %s"),
+		      object->section_name(shndx).c_str());
+      pdata = uncompressed_data;
+      len = uncompressed_size;
+    }
+
   const Char_type* p = reinterpret_cast<const Char_type*>(pdata);
   const Char_type* pend = p + len / sizeof(Char_type);
 
@@ -504,6 +538,8 @@ Output_merge_string<Char_type>::do_add_input_section(Relobj* object,
     {
       object->error(_("mergeable string section length not multiple of "
 		      "character size"));
+      if (uncompressed_data != NULL)
+	delete[] uncompressed_data;
       return false;
     }
 
@@ -545,6 +581,9 @@ Output_merge_string<Char_type>::do_add_input_section(Relobj* object,
   if (this->keeps_input_sections())
     record_input_section(object, shndx);
 
+  if (uncompressed_data != NULL)
+    delete[] uncompressed_data;
+
   return true;
 }