Fix failure in exception_static_test.

Because the __EH_FRAME_BEGIN__ symbol is provided in an empty .eh_frame
section in crtbeginT.o, if crt1.o has a non-empty .eh_frame section,
we place all optimized .eh_frame sections into the output section ahead
of the __EH_FRAME_BEGIN__ symbol, which breaks EH for statically-linked
binaries.

This patch fixes the problem by delaying the attachment of the optimized
.eh_frame sections to the output section until we see the end marker
section (or to the end of pass 1 if we never see an end marker).

gold/
	PR gold/14675
	* ehframe.cc (Eh_frame::add_ehframe_input_section): Change return type;
	return enum indicating whether .eh_frame section is empty, optimizable,
	unrecognized, or an end marker. Adjust explicit instantiations.
	* ehframe.h (Eh_frame::Eh_frame_section_disposition): New enum type.
	(Eh_frame::add_ehframe_input_section): Change return type.
	* gold.cc (queue_middle_tasks): Call Layout::finalize_eh_frame_section.
	* layout.cc (Layout::layout_eh_frame): Don't add optimized sections
	to the .eh_frame output section until we see the end marker.
	(Layout::finalize_eh_frame_section): New.
	* layout.h: (Layout::finalize_eh_frame_section): New.

1 files changed, 3 insertions, 0 deletions

diff --git a/gold/gold.cc b/gold/gold.cc
index ab15980..e345887 100644
--- a/gold/gold.cc
+++ b/gold/gold.cc
@@ -492,6 +492,9 @@ queue_middle_tasks(const General_options& options,
   if (timer != NULL)
     timer->stamp(0);
 
+  // Finalize the .eh_frame section.
+  layout->finalize_eh_frame_section();
+
   // Add any symbols named with -u options to the symbol table.
   symtab->add_undefined_symbols_from_command_line(layout);