Default text reordering fix with a flag to turn it off.

2013-01-24  Sriraman Tallam  <tmsriram@google.com>

	* layout.cc (Layout::layout): Check for option text_reorder.
	(Layout::make_output_section): Ditto.
	* options.h (text_reorder): New option.
	* output.cc (Input_section_sort_compare): Remove special ordering
	of section names.
	(Output_section::
	 Input_section_sort_section_name_special_ordering_compare::
	 operator()): New function.
	(Output_section::sort_attached_input_sections): Use new sort function
	for .text.
	* output.h (Input_section_sort_section_name_special_ordering_compare):
	New struct.
	* testsuite/Makefile.am (text_section_grouping): Test option
	--no-text-reorder
	* testsuite/Makefile.in: Regenerate.
	* testsuite/text_section_grouping.sh: Check order of functions without
	default text reordering.

1 files changed, 9 insertions, 0 deletions

diff --git a/gold/output.h b/gold/output.h
index 8f3943b..7722237 100644
--- a/gold/output.h
+++ b/gold/output.h
@@ -4200,6 +4200,15 @@ class Output_section : public Output_data
 	       const Input_section_sort_entry&) const;
   };
 
+  // This is the sort comparison function for .text to sort sections with
+  // prefixes .text.{unlikely,exit,startup,hot} before other sections.
+  struct Input_section_sort_section_name_special_ordering_compare
+  {
+    bool
+    operator()(const Input_section_sort_entry&,
+	       const Input_section_sort_entry&) const;
+  };
+
   // Fill data.  This is used to fill in data between input sections.
   // It is also used for data statements (BYTE, WORD, etc.) in linker
   // scripts.  When we have to keep track of the input sections, we