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Re: [Qemu-devel] Debugging vmlinux with qemu and gdb. Unable to step, n

From: Jan Kiszka
Subject: Re: [Qemu-devel] Debugging vmlinux with qemu and gdb. Unable to step, next, print or to get any information..
Date: Fri, 09 May 2008 10:29:02 +0200
User-agent: Thunderbird (X11/20080226)

Mulyadi Santosa wrote:
> HI Jason...
> On Fri, May 9, 2008 at 11:39 AM, Jason Wessel
> <address@hidden> wrote:
>>> Of course, this assume that there is no bugs while Qemu inspect and
>>> found that it must pause at certain address... I believe Jasson Wessel
>>> had squashed all that kind of bugs in the past.
>>> regards,
>>> Mulyadi.
>> I believe that Mulyadi is talking about the following two patches which
>> are attached here, assuming you are able to hit breakpoints.
> Thanks.... I believe that's the patch that will fix his problem.

I'm not /that/ sure. The second one affects single stepping only, and
the first one is now redundant as QEMU (and thus also KVM) uses a
compacter way of supporting x86-64 registers. But maybe the patch is
still required for "old" QEMU 0.9.1 (I'm working with development heads
only). But IIRC, the error pattern used to be quite different when QEMU
did not yet support x86-64 registers.


Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux

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