PATCH: libffi: add MIPS O32 DWARF-2 unwind info

[Casey Marshall]

The attached patch adds DWARF-2 unwinding info for MIPS ffi_call_O32.
I'm kind of new to both DWARF-2 and MIPS assembly, so this may not be
completely correct. I have tried this on a modified 3.3.3 -- the
changes since then appear to have been only to the SIZEOF_ARG macro --
but have not tried it on a newer version. It seems to work, since
things like `invokethrow.java' work properly for me now.

Note that this is only for the O32 ABI. I think that N32 would be
similar (identical?) to this, but I can't test it.

Also: GCJ emits references to __gcj_personality_v0 in the assembler it
generates, as a "personality" in the CIE. I didn't know if this was
appropriate for the ffi code, so I merely omitted it. Is this ok?

(I wasn't sure where to send this patch, but I suppose GCJ users will
find it useful)

2004-06-23  Casey Marshall <csm@gnu.org>

	* src/mips/o32.S: added unwind info for `ffi_call_O32'.

-- 
Casey Marshall || csm@gnu.org
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