[MIPS] Initial checkin for MIPS changes for GOLD.

gold/layout.cc

Index: gold/layout.cc
===================================================================
--- a/gold/layout.cc
+++ b/gold/layout.cc
@@ -2543,6 +2543,11 @@
 
   file_header->set_section_info(this->section_headers_, shstrtab_section);
 
+  // Sets data with values that are only known after sections are finalized.
+  // For MIPS it is needed to set flag if there are more then 0x10000 symbols
+  // in dynamic symbol table.
+  target->fix_sections (this, symtab);
+
   // Now we know exactly where everything goes in the output file
   // (except for non-allocated sections which require postprocessing).
   Output_data::layout_complete();
@@ -2973,12 +2978,32 @@
   if (type2 == elfcpp::PT_INTERP)
     return false;
 
+  // This single PT_MIPS_REGINFO segment is required to precede any loadable
+  // segment.  We simply make it always third.
+  // TODO AS: Make this only valid for MIPS !!!
+  if (type1 == elfcpp::PT_MIPS_REGINFO)
+    {
+      gold_assert(type2 != elfcpp::PT_MIPS_REGINFO);
+      return true;
+    }
+  if (type2 == elfcpp::PT_MIPS_REGINFO)
+    return false;
+
   // We then put PT_LOAD segments before any other segments.
   if (type1 == elfcpp::PT_LOAD && type2 != elfcpp::PT_LOAD)
     return true;
   if (type2 == elfcpp::PT_LOAD && type1 != elfcpp::PT_LOAD)
     return false;
 
+  // MIPS needs PT_NULL segment to be last.
+  if (type1 == elfcpp::PT_NULL)
+    {
+      gold_assert(type2 != elfcpp::PT_NULL);
+      return false;
+    }
+  if (type2 == elfcpp::PT_NULL)
+    return true;
+
   // We put the PT_TLS segment last except for the PT_GNU_RELRO
   // segment, because that is where the dynamic linker expects to find
   // it (this is just for efficiency; other positions would also work
@@ -4509,7 +4534,8 @@
 	       && parameters->options().shared())
 	gold_warning(_("shared library text segment is not shareable"));
     }
-  if (parameters->options().shared() && this->has_static_tls())
+  if ((parameters->options().shared() || parameters->options().pie())
+    && this->has_static_tls())
     flags |= elfcpp::DF_STATIC_TLS;
   if (parameters->options().origin())
     flags |= elfcpp::DF_ORIGIN;