PR 7091

* output.cc (Output_section::find_starting_output_address): Rename
	from starting_output_address; add PADDR parameter; change return
	type.
	* output.h (class Output_section): Declare
	find_starting_output_address instead of starting_output_address.
	* object.cc (Sized_relobj::do_finalize_local_symbols): Handle a
	section symbol for which we can't find a merge section.

gold/ChangeLog

@@ -1,5 +1,14 @@
 2009-02-27  Ian Lance Taylor  <iant@google.com>
 
+	PR 7091
+	* output.cc (Output_section::find_starting_output_address): Rename
+	from starting_output_address; add PADDR parameter; change return
+	type.
+	* output.h (class Output_section): Declare
+	find_starting_output_address instead of starting_output_address.
+	* object.cc (Sized_relobj::do_finalize_local_symbols): Handle a
+	section symbol for which we can't find a merge section.
+
 	PR 9836
 	* symtab.cc (Symbol_table::add_from_object): If the visibility is
 	hidden or internal, force the symbol to be local.

gold/object.cc

@@ -1554,20 +1554,31 @@ Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index,
 	    }
 	  else if (out_offsets[shndx] == invalid_address)
 	    {
+	      uint64_t start;
+
 	      // This is a SHF_MERGE section or one which otherwise
-	      // requires special handling.  We get the output address
+	      // requires special handling.
-	      // of the start of the merged section.  If this is not a
-	      // section symbol, we can then determine the final
-	      // value.  If it is a section symbol, we can not, as in
-	      // that case we have to consider the addend to determine
-	      // the value to use in a relocation.
 	      if (!lv.is_section_symbol())
-		lv.set_output_value(os->output_address(this, shndx,
+		{
-                                                       lv.input_value()));
+		  // This is not a section symbol.  We can determine
+		  // the final value now.
+		  lv.set_output_value(os->output_address(this, shndx,
+							 lv.input_value()));
+		}
+	      else if (!os->find_starting_output_address(this, shndx, &start))
+		{
+		  // This is a section symbol, but apparently not one
+		  // in a merged section.  Just use the start of the
+		  // output section.  This happens with relocatable
+		  // links when the input object has section symbols
+		  // for arbitrary non-merge sections.
+		  lv.set_output_value(os->address());
+		}
 	      else
 		{
-                  section_offset_type start =
+		  // We have to consider the addend to determine the
-                    os->starting_output_address(this, shndx);
+		  // value to use in a relocation.  START is the start
+		  // of this input section.
 		  Merged_symbol_value<size>* msv =
 		    new Merged_symbol_value<size>(lv.input_value(), start);
 		  lv.set_merged_symbol_value(msv);

gold/output.cc

@@ -1,6 +1,6 @@
 // output.cc -- manage the output file for gold
 
-// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
 // Written by Ian Lance Taylor <iant@google.com>.
 
 // This file is part of gold.
@@ -2057,12 +2057,13 @@ Output_section::output_address(const Relobj* object, unsigned int shndx,
   gold_unreachable();
 }
 
-// Return the output address of the start of the merged section for
+// Find the output address of the start of the merged section for
 // input section SHNDX in object OBJECT.
 
-uint64_t
+bool
-Output_section::starting_output_address(const Relobj* object,
+Output_section::find_starting_output_address(const Relobj* object,
-					unsigned int shndx) const
+					     unsigned int shndx,
+					     uint64_t* paddr) const
 {
   uint64_t addr = this->address() + this->first_input_offset_;
   for (Input_section_list::const_iterator p = this->input_sections_.begin();
@@ -2076,11 +2077,16 @@ Output_section::starting_output_address(const Relobj* object,
       // Unfortunately we don't know for sure that input offset 0 is
       // mapped at all.
       if (p->is_merge_section_for(object, shndx))
-	return addr;
+	{
+	  *paddr = addr;
+	  return true;
+	}
 
       addr += p->data_size();
     }
-  gold_unreachable();
+
+  // We couldn't find a merge output section for this input section.
+  return false;
 }
 
 // Set the data size of an Output_section.  This is where we handle

gold/output.h

@@ -1,6 +1,6 @@
 // output.h -- manage the output file for gold   -*- C++ -*-
 
-// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
 // Written by Ian Lance Taylor <iant@google.com>.
 
 // This file is part of gold.
@@ -2260,12 +2260,14 @@ class Output_section : public Output_data
   output_address(const Relobj* object, unsigned int shndx,
 		 off_t offset) const;
 
-  // Return the output address of the start of the merged section for
+  // Look for the merged section for input section SHNDX in object
-  // input section SHNDX in object OBJECT.  This is not necessarily
+  // OBJECT.  If found, return true, and set *ADDR to the address of
-  // the offset corresponding to input offset 0 in the section, since
+  // the start of the merged section.  This is not necessary the
-  // the section may be mapped arbitrarily.
+  // output offset corresponding to input offset 0 in the section,
-  uint64_t
+  // since the section may be mapped arbitrarily.
-  starting_output_address(const Relobj* object, unsigned int shndx) const;
+  bool
+  find_starting_output_address(const Relobj* object, unsigned int shndx,
+			       uint64_t* addr) const;
 
   // Record that this output section was found in the SECTIONS clause
   // of a linker script.