2015-09-15  Max Filippov  <jcmvbkbc@gmail.com>
gcc/
	* config/xtensa/xtensa.h (DWARF_ALT_FRAME_RETURN_COLUMN): New
	definition.
	(DWARF_FRAME_REGISTERS): Reserve space for one extra register in
	call0 ABI.

libgcc/
	* config/xtensa/linux-unwind.h (xtensa_fallback_frame_state):
	Add support for call0 ABI.

From-SVN: r227809