Hui,

> I had post a patch for it.  It still in discussion.
> http://sourceware.org/ml/gdb-patches/2009-08/msg00574.html

As far as I can tell, you received some feedback from one of the
maintainers (Mark Kettenis) about your patch:

    http://sourceware.org/ml/gdb-patches/2009-08/msg00584.html

I also looked at your patch before looking at the replies, and I had
the same comments as Jiang and Mark. The casts in this raised a red
flag, and I don't see why we should need them.

Would it make sense to define a type syscall_t that's either an int
or an unsigned int, and use that consistently throughout?  Otherwise,
another simpler option would be to just use either int or unsigned int
without using a typedef.

In the meantime, I think you can get away from this all by using
regcache_raw_write_signed. Read the syscall ID as a signed number,
all should be fine. I'm attaching a patch that fixes the build
issue an illustrates this suggestion. Can you please give it a
test and resubmit if it works for you?

-- 
Joel