From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: kvm@vger.kernel.org, jan.kiszka@siemens.com
Subject: Re: kvm guest debug using gdb on x86
Date: Wed, 20 May 2009 00:40:09 +0530 [thread overview]
Message-ID: <20090519191009.GA8872@skywalker> (raw)
In-Reply-To: <20090519185312.GA32697@skywalker>
On Wed, May 20, 2009 at 12:23:12AM +0530, Aneesh Kumar K.V wrote:
> Hi,
>
> With the latest qemu-kvm and 2.6.30-rc6 kernel i am not able to get
> the guest debugging with gdb. I get the following error.
>
> $gdb ./vmlinux
> GNU gdb 6.8-debian
> Copyright (C) 2008 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later
> <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law. Type "show
> copying"
> and "show warranty" for details.
> This GDB was configured as "i486-linux-gnu"...
> (gdb) b do_fork
> Breakpoint 1 at 0xc106cfc8: file kernel/fork.c, line 1347.
> (gdb) target remote localhost:1234
> Remote debugging using localhost:1234
> [New Thread 1]
> Remote 'g' packet reply is too long:
> 7fa5000000000000000000000000000057e209c10000000004000000000000000000000000000000c8b3d0c100000000c03fd1c100000000a83fd1c10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000912d03c1000000000202000060000000680000007b0000007b000000d8000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000f60b801540000000000000000000007f03000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
> (gdb)
>
> any patches that i can try ?
Works better with the four patches found at
http://git.kiszka.org/?p=kvm-userspace.git;a=shortlog;h=refs/heads/queues/gdb
But a next and continue doesn't get the prompt back on gdb. The guest
does stops the execution.
-aneesh
next prev parent reply other threads:[~2009-05-19 19:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-19 18:53 kvm guest debug using gdb on x86 Aneesh Kumar K.V
2009-05-19 19:10 ` Aneesh Kumar K.V [this message]
2009-05-20 8:10 ` Jan Kiszka
2009-05-20 8:40 ` Aneesh Kumar K.V
2009-05-20 8:57 ` Jan Kiszka
2009-05-20 9:04 ` Aneesh Kumar K.V
2009-05-20 9:41 ` Jan Kiszka
2009-05-20 9:46 ` Jan Kiszka
2009-05-20 10:49 ` Avi Kivity
2009-05-21 7:54 ` Jan Kiszka
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