Subject: Re: new ELF marking
To: "H.J. Lu" <hjl.tools@gmail.com>, Kostya Serebryany <kcc@google.com>
Cc: Kees Cook <keescook@google.com>, LKML <linux-kernel@vger.kernel.org>,
        Binutils <binutils@sourceware.org>
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From: "Carlos O'Donell" <carlos@redhat.com>
Organization: Red Hat
Message-ID: <5a612234-ae9a-e66b-9810-02331a569a2e@redhat.com>
Date: Wed, 9 Aug 2017 18:37:35 -0400
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On 08/09/2017 05:24 PM, H.J. Lu wrote:
> On Wed, Aug 9, 2017 at 1:32 PM, Kostya Serebryany <kcc@google.com> wrote:
>>>>
>>>> I believe this would only be an output bit, but I'm not sure how it
>>>> would be wired into binutils. Kostya, do you know any details about
>>>> how AddressSanitizer might be able to create this ELF note?
>>
>> I don't, hopefully H.J's suggestion works.
>> Will it be backward compatible?
>> (i.e. will the binaries built in the new way work on the old kernels?)
>>
>>
> 
> Yes,  it is backward compatible by design.

... only as long as the semantics implied by the flags are hints that
can be ignored.

-- 
Cheers,
Carlos.