[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] How to capture guest %rip from a qemu process without m
|
From: |
Jan Kiszka |
|
Subject: |
Re: [Qemu-devel] How to capture guest %rip from a qemu process without monitor? |
|
Date: |
Fri, 30 Sep 2011 10:49:20 +0200 |
|
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 |
On 2011-09-30 09:42, Richard W.M. Jones wrote:
>
> I've finally managed to reproduce a very infrequent kernel boot hang
> by forcing TCG (so it runs slower, bug seems to be timing sensitive)
> and running a boot test in a loop thousands of times.
>
> I'd like to find out where in the guest kernel this is looping.
>
> Unfortunately I don't have access to the monitor so "info registers"
> won't work, but I can attach to the qemu process with gdb.
>
> Which TCG struct contains %rip, other registers? What other useful
> information can be captured using only gdb?
Print first_cpu->eip, maybe also first_cpu->segs[1] to dump the CS
segment cache (relevant while in real mode).
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux