Re: register type as signed or unsigned?

Jan Kratochvil
2006-10-11T00:48:21Z

On Wed, 11 Oct 2006 02:37:57 +0200, ligang@sunnorth.com.cn wrote:
> Daniel Jacobowitz <drow@false.org> wrote on 2006-10-10 20:50:02:
...
> > No; in fact, it doesn't make much difference. You should use whichever
> > is "more natural" for your target instruction set; it will affect
> > "print $reg" and "info reg".
>
> That is to say, whether builtin_type_int32 or builtin_type_uint32 is
> correct for GDB.

If the register is used as address, use "uint32".
If it is used for general computation incl. offsets in memory, use "int32".
"uint32" should be IMO a safer bet but sometimes you may need `(int)$regname'.

> Would you please give me some more hints?

You may check the recent thread being affected by such register typing:
http://sourceware.org/ml/gdb-patches/2006-09/msg00191.html

Failed now to simulate it on 32-bit only gdbhost/inferior.

Regards,
Jan