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From: Alex =?utf-8?Q?Benn=C3=A9e?= <alex.bennee@linaro.org>
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Date: Thu, 28 Apr 2016 19:45:59 +0100
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Subject: Re: [Qemu-devel] emulation details of qemu
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To: tutu sky <ooohooo_u@hotmail.com>
Cc: Stefan Hajnoczi <stefanha@gmail.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>


tutu sky <ooohooo_u@hotmail.com> writes:

> Thanks a lot Stefan,
> But if i want to change the content of a register during run time in
> debug mode, what should i do? is it possible at first?

Using the gdbstub sure you can change the register values when the
machine is halted.

>
> Regards.
> ________________________________________
> From: Stefan Hajnoczi <stefanha@gmail.com>
> Sent: Tuesday, April 26, 2016 9:31 AM
> To: tutu sky
> Cc: qemu-devel@nongnu.org
> Subject: Re: [Qemu-devel] emulation details of qemu
>
> On Sat, Apr 23, 2016 at 06:36:39AM +0000, tutu sky wrote:
>> I want to know that is it possible to access registers or micro-architectural part of a core/cpu in qemu during run time?
>
> Yes.  How and to what extent depends on whether you are using TCG, KVM,
> or TCI.  QEMU also has gdbstub support so you can single-step execution
> and access CPU registers.
>
> Stefan


--
Alex Bennée