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

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Message-ID: <daef60380906300212p2a461537p9730686084a9ef8d@mail.gmail.com>
Date:	Tue, 30 Jun 2009 17:12:31 +0800
From:	Hui Zhu <teawater@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH] Fix the multithread program core thread message error

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.
---
 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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