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From: 慕冬亮 <mudongliangabcd@gmail.com>
To: gdb@sourceware.org
Subject: How to get value of gs:0xc with LTS note in coredump?
Date: Tue, 04 Oct 2016 01:00:00 -0000	[thread overview]
Message-ID: <CAD-N9QXD-CntrGWEA8gYAXnURnC+7u3L1m1FwfzOgK0BcdCG9A@mail.gmail.com> (raw)

Dear all,

I have a question about gs and TLS in core dump. When I read the
assembly code from one coredump, there is one memory dereference :
gs:[edx] or gs:0xc.

I googled gs register and found it points to Thread Local Storage.
However, gs is a selector to GDT and this structure is in the kernel.
And I could not obtain it in coredump.

Then I searched all the segments in core dump. I found a note entry
with type NT_386_TLS, length 0x30. Is gs:0xc in this note ? And gs:0xc
is the 12th element of this note entry?

--
My best regards to you.

     No System Is Safe!
     Dongliang Mu


             reply	other threads:[~2016-10-04  1:00 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-04  1:00 慕冬亮 [this message]
2016-10-04  1:20 ` Jan Kratochvil
2016-10-04  1:49   ` 慕冬亮
2016-10-04  6:57     ` Jan Kratochvil
2016-10-04 17:06       ` 慕冬亮

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