* src/mips/ffi.c (ffi_pref_cif_machdep): set `cif->flags' to
	contain `FFI_TYPE_UINT64' as return type for any 64-bit
	integer (O32 ABI only).
	(ffi_prep_closure): new function.
	(ffi_closure_mips_inner_O32): new function.
	* src/mips/ffitarget.h: Define `FFI_CLOSURES' and
	`FFI_TRAMPOLINE_SIZE' appropriately if the ABI is o32.
	* src/mips/o32.S (ffi_call_O32): add labels for .eh_frame. Return
	64 bit integers correctly.
	(ffi_closure_O32): new function.
	Added DWARF-2 unwind info for both functions.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@86019 138bc75d-0d04-0410-961f-82ee72b054a4