unwind-dw2-fde.c failed on my port

[Eric Fisher]

Hello,

It's my new port of gcc. Libgcc is almost compiled for now, except
unwind-dw2-fde.c.
The error information is 
'../../gcc-3.4.4/gcc/unwind-dw2-fde.c:968:  internal compiler error:
in insert_save,
at caller-save.c:728
Please submit a full bug report'
Of course, there are some thing wrong about my backend. Maybe is about the
registers save and restore during the function calls. But difficult to
find it. Can
anyone give me some suggestion and information?

Thanks a lot.

Eric.