linux-kernel - Re: [PATCH] Fix the multithread program core thread message error

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Date:	Wed, 1 Jul 2009 08:54:37 +0800
From:	Amerigo Wang <xiyou.wangcong@...il.com>
To:	Hui Zhu <teawater@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix the multithread program core thread message error


Hi, Hui.

On Tue, Jun 30, 2009 at 05:12:31PM +0800, Hui Zhu wrote:
>Fix the multithread program core thread message error.
>The thread message of core file is generated in
>elf_dump_thread_status.  The register values is set by
>elf_core_copy_task_regs in this function.
>static inline int elf_core_copy_task_regs(struct task_struct *t,
>					   elf_gregset_t* elfregs)
>{
>
>	return ELF_CORE_COPY_TASK_REGS(t, elfregs);
>	return 0;
>}
>If a arch doesn't define ELF_CORE_COPY_TASK_REGS, This function will do
>nothing.  Then the core file will not have the register message of
>thread.
>So add elf_core_copy_regs to set regiser values if
>ELF_CORE_COPY_TASK_REGS doesn't define.


You forgot your Signed-off-by line. :)

Hmmm, this patch looks sane for me. But could you please
send us your test program? i.e. how did you test this?

Thank you!


>---
> elfcore.h |    2 ++
> 1 file changed, 2 insertions(+)
>
>diff --git a/include/linux/elfcore.h b/include/linux/elfcore.h
>index 7605c5e..03ec167 100644
>--- a/include/linux/elfcore.h
>+++ b/include/linux/elfcore.h
>@@ -125,6 +125,8 @@ static inline int elf_core_copy_task_regs(struct
>task_struct *t, elf_gregset_t*
> #ifdef ELF_CORE_COPY_TASK_REGS
>
>        return ELF_CORE_COPY_TASK_REGS(t, elfregs);
>+#else
>+       elf_core_copy_regs(elfregs, task_pt_regs(t));
> #endif
>        return 0;
> }
>--
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