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From: WANG Cong <xiyou.wangcong@gmail.com>
Date: Wed, 26 Jan 2011 04:29:43 +0000 (UTC)
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References: <20110125231433.F2408190C3A@elbrus2.mtv.corp.google.com>
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Sender: linux-kernel-owner@vger.kernel.org
Subject: Re: [patch] UML kernels on {i386,x86_64} produce bad coredumps
To: linux-kernel@vger.kernel.org
Cc: user-mode-linux-devel@lists.sourceforge.net
List-ID: <user-mode-linux-devel.lists.sourceforge.net>

On Tue, 25 Jan 2011 15:14:33 -0800, Paul Pluzhnikov wrote:
...
> Examining the core shows that NT_PRSTATUS notes for all threads other
> than the one that crashed are zeroed out.
> 
> I believe this is happening because neither ELF_CORE_COPY_TASK_REGS nor
> task_pt_regs are defined under ARCH=um, and so elf_core_copy_task_regs()
> becomes a no-op.


I think this was missed due to some cleanups of the core elf
change, UML is one of the part overlooked by people. :-/

> 
> Attached patch fixes this for SUBARCH={x86_64,i386}.
> 
> Thanks,
> --
> Paul Pluzhnikov
> 
> P.S. Google has blanket FSF copyright assignment.
> 
> 
> Signed-off-by: Paul Pluzhnikov <ppluzhnikov@google.com>
> 

Acked-by: WANG Cong <xiyou.wangcong@gmail.com>

Thanks.