* config/ia64/unwind-ia64.c (uw_advance_context): New.  Call
	uw_update_context.
	* unwind-dw2.c (uw_advance_context): Likewise.
	* unwind-sjlj.c (uw_advance_context): Likewise.  Also call
	_Unwind_SjLj_Unregister.
	* unwind.inc (_Unwind_ForcedUnwind_Phase2): Call uw_advance_context.

From-SVN: r107103