linux-kernel - Re: [PATCH 2/2] coredump: add a new elf note with siginfo fields of the signal

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Message-Id: <20120913172511.A69262C09C@topped-with-meat.com>
Date:	Thu, 13 Sep 2012 10:25:11 -0700 (PDT)
From:	Roland McGrath <roland@...k.frob.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Denys Vlasenko <vda.linux@...glemail.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Amerigo Wang <amwang@...hat.com>
Subject: Re: [PATCH 2/2] coredump: add a new elf note with siginfo fields
	of the signal

I agree with Oleg.  If there is an NT_SIGINFO note, it should contain
exactly the siginfo_t layout and data that we otherwise expose to userland
already.  That is, it must match what PTRACE_GETSIGINFO reports, which (I
think) also matches exactly what appears on the stack for a signal
delivery.  Note also that compat_binfmt_elf must deliver the 32-bit version
of siginfo_t, i.e. as copy_siginfo_to_user32 does.

Thanks,
Roland

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