unwind-ia64.c (ia64_copy_rbs): New function.

unwind-ia64.c (ia64_copy_rbs): New function.

	* config/ia64/unwind-ia64.c (ia64_copy_rbs): New function.
	(unw_access_gr): Only call ia64_rse_rnat_addr if addr is above
	regstk_top.
	(uw_frame_state_for): Handle locations inside bundles.
	(uw_init_context_1): Initialize context->rnat.
	Set context->regstk_top to lowest rbs address which has nat collection
	in context->rnat.
	(uw_install_context): Fix rnat restoring.
	Restore ar.rsc to previous state.
	* config/ia64/linux.h (MD_FALLBACK_FRAME_STATE_FOR,
	MD_HANDLE_UNWABI): Handle unwinding through SA_ONSTACK frames.

	* gcc.dg/cleanup-10.c: New test.
	* gcc.dg/cleanup-11.c: New test.

From-SVN: r74835