elfcpp/:

	* dwarf.h (enum DW_FORM): Define.
gold/:
	* reduced_debug_output.cc: New file.
	* reduced_debug_output.h: New file.
	* options.h (class General_optoins): Add --strip-debug-non-line.
	* options.cc (General_options::finalize): Add strip_debug_non_line
	to the strip heirarchy.
	* layout.h (class Layout): Add debug_abbrev_ and debug_info_
	fields.
	* layout.cc: Include "reduced_debug_output.h".
	(Layout::Layout): Initialize new fields.
	(line_only_debug_sections): New static array.
	(is_lines_only_debug_sections): New static inline function.
	(Layout::include_section): Handle --strip-debug-non-line.
	(Layout::make_output_section): If --strip-debug-non-line, build
	new output sections for .debug_abbrev and .debug_info.
	* dwarf_reader.cc (read_unsigned_LEB_128): Move to namespace
	gold.  Warn about possible overflow.
	(read_signed_LEB_128): Likewise.
	* dwarf_reader.h: (read_unsigned_LEB_128): Declare.
	(read_signed_LEB_128): Declare.
	* Makefile.am (CCFILES): Add reduced_debug_output.cc.
	(HFILES): Add reduced_debug_output.h.
	* Makefile.in: Rebuild.

1 files changed, 13 insertions, 6 deletions

diff --git a/gold/dwarf_reader.cc b/gold/dwarf_reader.cc
index ec697e428e..3d0f65a4b5 100644
--- a/gold/dwarf_reader.cc
+++ b/gold/dwarf_reader.cc
@@ -32,7 +32,7 @@
 #include "reloc.h"
 #include "dwarf_reader.h"
 
-namespace {
+namespace gold {
 
 // Read an unsigned LEB128 number.  Each byte contains 7 bits of
 // information, plus one bit saying whether the number continues or
@@ -48,6 +48,12 @@ read_unsigned_LEB_128(const unsigned char* buffer, size_t* len)
 
   do
     {
+      if (num_read >= 64 / 7) 
+        {
+          gold_warning(_("Unusually large LEB128 decoded, "
+			 "debug information may be corrupted"));
+          break;
+        }
       byte = *buffer++;
       num_read++;
       result |= (static_cast<uint64_t>(byte & 0x7f)) << shift;
@@ -73,6 +79,12 @@ read_signed_LEB_128(const unsigned char* buffer, size_t* len)
 
   do
     {
+      if (num_read >= 64 / 7) 
+        {
+          gold_warning(_("Unusually large LEB128 decoded, "
+			 "debug information may be corrupted"));
+          break;
+        }
       byte = *buffer++;
       num_read++;
       result |= (static_cast<uint64_t>(byte & 0x7f) << shift);
@@ -86,11 +98,6 @@ read_signed_LEB_128(const unsigned char* buffer, size_t* len)
   return result;
 }
 
-} // End anonymous namespace.
-
-
-namespace gold {
-
 // This is the format of a DWARF2/3 line state machine that we process
 // opcodes using.  There is no need for anything outside the lineinfo
 // processor to know how this works.