Re: [PATCH v2 2/2] kallsyms: handle special absolute symbols
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- To: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
- Subject: Re: [PATCH v2 2/2] kallsyms: handle special absolute symbols
- From: Kees Cook <keescook@xxxxxxxxxxxx>
- Date: Wed, 12 Mar 2014 23:23:37 -0700
- Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Andrew Honig <ahonig@xxxxxxxxxx>, Michal Marek <mmarek@xxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, Tejun Heo <tj@xxxxxxxxxx>, Tony Luck <tony.luck@xxxxxxxxx>, Fenghua Yu <fenghua.yu@xxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, LKML <linux-kernel@xxxxxxxxxxxxxxx>
- In-reply-to: <87lhwevk98.fsf@rustcorp.com.au>
- List-id: <linux-ia64.vger.kernel.org>
- References: <1394240425-11647-1-git-send-email-keescook@chromium.org> <1394240425-11647-3-git-send-email-keescook@chromium.org> <CAGXu5j+QoHH004usCiCfJU6DPQFnQ2gt3P4GDLS7Gx8Tz_gK+A@mail.gmail.com> <87y50fuei5.fsf@rustcorp.com.au> <CAGXu5j+Zto=D_UYgn6DLVcOQyB_8sAs86masY8iuDTU5ZEZ8OQ@mail.gmail.com> <87lhwevk98.fsf@rustcorp.com.au>
On Wed, Mar 12, 2014 at 8:40 PM, Rusty Russell <rusty@xxxxxxxxxxxxxxx> wrote:
> Kees Cook <keescook@xxxxxxxxxxxx> writes:
>> Why not just do this with 0-base-address detection like my v2? That
>> would mean we don't need to remember to add this flag in the future to
>> imagined new architectures that might want this 0-based per_cpu
>> feature.
>
> Because future architectures will get this right and emit absolute
> symbols. I hope!
>
> I'm swamped at the moment, but am hoping to investigate that for
> x86-64. This is a stop-gap.
Okay, I'm convinced. :)
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
Thanks!
-Kees
--
Kees Cook
Chrome OS Security
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