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Re: GDB stub - connection from 32 bit GDB or 64 bit GDB
- From: Daniel Jacobowitz <drow at false dot org>
- To: Mitchell Fang <mitchell dot fang at gmail dot com>
- Cc: gdb at sourceware dot org
- Date: Wed, 27 Sep 2006 13:51:35 -0400
- Subject: Re: GDB stub - connection from 32 bit GDB or 64 bit GDB
- References: <cbd6ac8b0609271034r311962aakc04753114eec404c@mail.gmail.com>
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?
--
Daniel Jacobowitz
CodeSourcery