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Date: Wed, 1 Apr 2020 00:32:28 -0700
From: Kees Cook <keescook@...omium.org>
To: Slava Bacherikov <slava@...her09.org>
Cc: Andrii Nakryiko <andrii.nakryiko@...il.com>,
Daniel Borkmann <daniel@...earbox.net>,
Jann Horn <jannh@...gle.com>,
Alexei Starovoitov <alexei.starovoitov@...il.com>,
bpf <bpf@...r.kernel.org>,
Kernel Hardening <kernel-hardening@...ts.openwall.com>
Subject: Re: CONFIG_DEBUG_INFO_BTF and CONFIG_GCC_PLUGIN_RANDSTRUCT
On Wed, Apr 01, 2020 at 12:24:46AM +0300, Slava Bacherikov wrote:
> 31.03.2020 23:23, Andrii Nakryiko пишет:
> > On Tue, Mar 31, 2020 at 12:58 PM Kees Cook <keescook@...omium.org> wrote:
> >> Sure! That'd by fine by me. I'd just like it to be a "|| COMPILE_TEST"
> >> for GCC_PLUGIN_RANDSTRUCT. Feel free to CC me for an Ack. :)
> >>
> >
> > +cc Slava
> >
> > I'm unsure what COMPILE_TEST dependency (or is it anti-dependency?)
> > has to do with BTF generation and reading description in Kconfig
> > didn't clarify it for me. Can you please elaborate just a bit? Thanks!
> >
> >> -Kees
>
> Hi,
>
> Regarding COMPILE_TEST, DEBUG_INFO has dependency on:
>
> DEBUG_KERNEL && !COMPILE_TEST
>
> And DEBUG_INFO_BTF depends on DEBUG_INFO, so enabling COMPILE_TEST
> would block DEBUG_INFO and so DEBUG_INFO_BTF as well. Unless I don't
> understand something and there is some other reason to add it.
I meant that if you're adjusting the depends for GCC_PLUGIN_RANDSTRUCT,
I'd like it to be:
depends on COMPILE_TEST || !DEBUG_INFO
That way randconfig, all*config, etc, will still select
GCC_PLUGIN_RANDSTRUCT with everything else, regardless of DEBUG_INFO.
--
Kees Cook
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