+2013-07-19 Roland McGrath <mcgrathr@google.com>
+
+ * options.h (General_options): Add -Trodata-segment option.
+ * parameters.cc (Parameters::check_rodata_segment): New function.
+ (Parameters::set_target_once): Call it.
+ * parameters.h (Parameters): Declare it (private member function).
+ * layout.cc (load_seg_unusable_for_headers): New function, broken
+ out of Layout::relaxation_loop_body. If TARGET->isolate_execinstr()
+ then validate rodata segment rather than text segment.
+ (relaxation_loop_body): Call that.
+ (is_text_segment): New function. Don't admit a non-executable
+ segment if TARGET->isolate_execinstr().
+ (set_segment_offsets): Call it. Honor -Trodata-segment option.
+