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[Qemu-devel] Re: [PATCH] optionally specify vm stop message
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] Re: [PATCH] optionally specify vm stop message |
Date: |
Fri, 16 Jan 2009 17:36:27 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
Anthony Liguori wrote:
> Jan Kiszka wrote:
>> Anthony Liguori wrote:
>>
>>>> Also non zero reasons a handled differently by vm_stop. Don't know
>>>> why.
>>>>
>>> It's an ugly hack for gdbstub. It notifies gdb when a breakpoint
>>> occurs. We have far too many state tracking mechanisms. Anyway, gdb
>>> can pass something like VM_STOP_BP and that can be used to trigger the
>>> callback.
>>>
>>
>> It's not only used for breakpoints but any stop condition that should be
>> reported to the gdb frontend (so far: EXCP_DEBUG and EXCP_INTERRUPT).
>> Not sure, though, how to deal with ENOSPC - it's not a guest fault, it's
>> a host problem. From that POV, gdb should not receive it.
>>
>
> We already have a vm_change_state_handler that is invoked whenever a
> guest starts running or stops running. gdb should be able to use that
> and look at env->exception_index, no?
I don't think env->exception_index is set when you issue "stop" from the
monitor, e.g. Moreover, that would be an ugly (out-of-band) API as well.
Jan
--
Siemens AG, Corporate Technology, CT SE 26
Corporate Competence Center Embedded Linux
- [Qemu-devel] [PATCH] optionally specify vm stop message, Gleb Natapov, 2009/01/15
- Re: [Qemu-devel] [PATCH] optionally specify vm stop message, Anthony Liguori, 2009/01/15
- Re: [Qemu-devel] [PATCH] optionally specify vm stop message, Gleb Natapov, 2009/01/16
- Re: [Qemu-devel] [PATCH] optionally specify vm stop message, Anthony Liguori, 2009/01/16
- [Qemu-devel] Re: [PATCH] optionally specify vm stop message, Jan Kiszka, 2009/01/16
- Re: [Qemu-devel] Re: [PATCH] optionally specify vm stop message, Anthony Liguori, 2009/01/16
- [Qemu-devel] Re: [PATCH] optionally specify vm stop message,
Jan Kiszka <=
- [Qemu-devel] Re: [PATCH] optionally specify vm stop message, Jan Kiszka, 2009/01/16
- [Qemu-devel] Re: [PATCH] optionally specify vm stop message, Jan Kiszka, 2009/01/16
- Re: [Qemu-devel] Re: [PATCH] optionally specify vm stop message, Anthony Liguori, 2009/01/16