Re: GDB stub - connection from 32 bit GDB or 64 bit GDB

Mitchell Fang
2006-09-27T18:17:37Z

On 9/27/06, Daniel Jacobowitz <drow@false.org> wrote:
> It always amazes me how a problem will be known but quiet for a couple
> of years, and then half a dozen people will look at it at once :-)
>
> On Wed, Sep 27, 2006 at 10:34:45AM -0700, Mitchell Fang wrote:
> > Hi,
> >
> > How can the gdb stub know if a 32 bit GDB is connecting to the stub
> > or a 64 bit GDB is connecting to the stub? Is it even possible? It
> > doesn't seem possible to me looking at the current gdb remote
> > commands, but hopefully I overlooked something.
>
> It's not possible.
>
> > I have tried different combinations with 32-bit and 64-bit GDBs and
> > gdbservers and it seems like a 32 bit GDB will not work with a 64 bit
> > gdbserver and vice versa.
>
> The stub shouldn't adapt: the GDB client should. This may be of
> interest:
> http://sourceware.org/ml/gdb-patches/2006-09/msg00187.html
> http://sourceware.org/ml/gdb-patches/2006-09/msg00188.html
>
> I'm less optimistic I'll have my code out this week, but I'm still
> trying. What architecture are you using?

The target architecture is PowerPC and the host architecture is i686 cygwin.

Thanks for your help and I will await your patch.

Mitchell

>
> --
> Daniel Jacobowitz
> CodeSourcery
>