[MIPS] Initial checkin for MIPS changes for GOLD.

gold/output.cc

Index: gold/output.cc
===================================================================
--- a/gold/output.cc
+++ b/gold/output.cc
@@ -608,7 +608,10 @@
 	{
 	  if (should_issue_warning)
 	    gold_warning("cannot find entry symbol '%s'", entry);
-	  v = 0;
+
+	  // Can't find the entry symbol, and it's not a number.  Use

[robertm, 2012/04/27 19:46:15]

This wont help with pnacl, wouldn't it be cleaner to make sure that you have
proper naming of the entry points - otherwise you are just hiding bugs

[Aleksandar Simeonov, 2012/05/08 15:21:42]

MIPS port of Gold is made to work the same way as it LD does. So it first search
for -e entry command line option, then __start symbol, then address of first
byte of .text section and if none found, the address 0.

+	  // the first address in the text section.
+	  v = this->target_->text_section_address();
 	}
     }
 
@@ -1152,6 +1155,12 @@
   compare(const Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>& r2)
     const
 {
+  // R_MIPS_NONE relocation have to be first.

[robertm, 2012/04/27 19:46:15]

why ?  add comment

[Aleksandar Simeonov, 2012/05/08 15:21:42]

On IRIX n64 rtld would ignore all dynamic relocations before an R_MIPS_NONE
entry.

http://sourceware.org/ml/binutils/2006-10/msg00186.html

+  if(this->type_ == 0)
+    return -1;
+  else if(r2.type_ == 0)
+    return 1;
+
   if (this->is_relative_)
     {
       if (!r2.is_relative_)
@@ -1723,6 +1732,10 @@
       val = pool->get_offset(this->u_.str);
       break;
 
+    case DYNAMIC_TARGET:
+      val = parameters->target().dynamic_tag_value(this->tag_);
+      break;
+
     default:
       val = this->u_.od->address() + this->offset_;
       break;