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Re: [Qemu-devel] [PATCH] monitor: Add port write command
From: |
Gleb Natapov |
Subject: |
Re: [Qemu-devel] [PATCH] monitor: Add port write command |
Date: |
Wed, 15 Jul 2009 10:34:51 +0300 |
On Tue, Jul 14, 2009 at 08:30:25PM +0100, Paul Brook wrote:
> > What would be really cool about this change is that we could introduce a
> > new set of commands to manipulate device state. We could save/restore
> > individual device state and that would allow us to dump device state via
> > the monitor and to manipulate individual fields of the device state. I
> > think this could be pretty useful for debugging.
>
> I'd be reluctant to expose the savevm state to the user.
>
> For debugging qemu I don't see it providing any real benefit over firing up
> GDB and poking directly at the device directly.
>
Not all environments where you need to debug things have gdb, qemu
sources or even non striped qemu binary.
> For debugging the guest there is some argument for exposing the device state
> (preferably via the gdb stub). However I think the savevm data tends to
> expose
> too many internal implementation details, rather than the interesting guest
> state. For most devices I'd expect the IO regions to be a better fit,
> especially if you want to prevent qemu crashing when the user does invalid
> writes.
>
> Paul
>
--
Gleb.
- [Qemu-devel] [PATCH] monitor: Add port write command, Jan Kiszka, 2009/07/14
- Re: [Qemu-devel] [PATCH] monitor: Add port write command, Anthony Liguori, 2009/07/14
- Message not available
- Re: [Qemu-devel] [PATCH] monitor: Add port write command, Blue Swirl, 2009/07/14
- Re: [Qemu-devel] [PATCH] monitor: Add port write command, Paul Brook, 2009/07/14
- Re: [Qemu-devel] [PATCH] monitor: Add port write command,
Gleb Natapov <=
- Re: [Qemu-devel] [PATCH] monitor: Add port write command, Paul Brook, 2009/07/15
- Re: [Qemu-devel] [PATCH] monitor: Add port write command, Jan Kiszka, 2009/07/15
- Re: [Qemu-devel] [PATCH] monitor: Add port write command, Gleb Natapov, 2009/07/15
- Re: [Qemu-devel] [PATCH] monitor: Add port write command, Gleb Natapov, 2009/07/15
- Re: [Qemu-devel] [PATCH] monitor: Add port write command, Anthony Liguori, 2009/07/15
- Re: [Qemu-devel] [PATCH] monitor: Add port write command, Paul Brook, 2009/07/15