From: Fabrice Bellard <fabrice@bellard.org>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Debugging registers DR0, DR7 don't work
Date: Thu, 10 Feb 2005 00:13:12 +0100 [thread overview]
Message-ID: <420A9908.1060507@bellard.org> (raw)
In-Reply-To: <420A8591.4090208@email.it>
Paolo Minazzi wrote:
> I'm Paolo Minazzi and I am a new user of QEMU.
> I use it to learn protected mode programming in asm.
> QEMU is very useful as I can avoid to reset continuosly my PC.
>
> Nevertheless I have a problem.
> I have tried to write an asm program to try dr0 and dr7 debugging register.
> I have found that this register don' work and I cannot receive the
> excepction 1.
> My program instead works fine in a real DOS system.
>
> Does someone indicate me how to enable debugging register with QEMU ?
Debug registers are currently unsupported by QEMU, but there is nothing
preventing to support them.
With the upcoming QEMU Accelerator Module, they are supported for CPL=3
(= for user code, which is the most useful).
Fabrice.
prev parent reply other threads:[~2005-02-09 23:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-09 21:50 [Qemu-devel] Debugging registers DR0, DR7 don't work Paolo Minazzi
2005-02-09 23:13 ` Fabrice Bellard [this message]
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