common gdb stub

common gdb stub

[Hollis Blanchard]

Hi Dan, from a quick search it seems xen/ia64 doesn't have a GDB stub,
is that right? (What exactly is pdb-stub about?)

Looking at arch/x86/cdb.c, it seems that most of this code could be made
common, and each architecture would supply its own version of
handle_register_read_command/handle_memory_read_command(). Would that be
useful to you?

-- 
Hollis Blanchard
IBM Linux Technology Center

Re: common gdb stub

[Kip Macy]

That would be useful to a lot of people. I suggested that a while back
but have been fighting other fires.

PDB was a more complete and MUCH more brittle stub.

On 4/15/05, Hollis Blanchard <hollisb@us.ibm.com> wrote:
> Hi Dan, from a quick search it seems xen/ia64 doesn't have a GDB stub,
> is that right? (What exactly is pdb-stub about?)
> 
> Looking at arch/x86/cdb.c, it seems that most of this code could be made
> common, and each architecture would supply its own version of
> handle_register_read_command/handle_memory_read_command(). Would that be
> useful to you?
> 
> --
> Hollis Blanchard
> IBM Linux Technology Center
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>

RE: common gdb stub

[Magenheimer, Dan (HP Labs Fort Collins)]

No, no gdb stub in xen/ia64 right now.  The pdb-stub is
vestigial... there used to be one in xen/x86 (a debugger
that Alex Ho was doing, see
http://www.cl.cam.ac.uk/~sos22/replay.bk/docs/misc/XenDebugger-HOWTO
http://doi.ieeecomputersociety.org/10.1109/GRID.2004.49) 
and the routines in it were accessed from common.

Because I've had the use of a good simulator, I haven't
had much use for an interactive debugger, but I'm sure
it will become useful at some point.  We had a similar
gdb-stub in vBlades and it sometimes came in handy.

Dan

> -----Original Message-----
> From: Kip Macy [mailto:kip.macy@gmail.com] 
> Sent: Friday, April 15, 2005 1:02 PM
> To: Hollis Blanchard
> Cc: Magenheimer, Dan (HP Labs Fort Collins); Xen-devel
> Subject: Re: [Xen-devel] common gdb stub
> 
> That would be useful to a lot of people. I suggested that a while back
> but have been fighting other fires.
> 
> PDB was a more complete and MUCH more brittle stub.
> 
> On 4/15/05, Hollis Blanchard <hollisb@us.ibm.com> wrote:
> > Hi Dan, from a quick search it seems xen/ia64 doesn't have 
> a GDB stub,
> > is that right? (What exactly is pdb-stub about?)
> > 
> > Looking at arch/x86/cdb.c, it seems that most of this code 
> could be made
> > common, and each architecture would supply its own version of
> > handle_register_read_command/handle_memory_read_command(). 
> Would that be
> > useful to you?
> > 
> > --
> > Hollis Blanchard
> > IBM Linux Technology Center
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xensource.com
> > http://lists.xensource.com/xen-devel
> >
>