From: Cary Coutant <ccoutant@gmail.com>
To: generic-abi@googlegroups.com
Cc: "Carlos O'Donell" <carlos@redhat.com>, gnu-gabi@sourceware.org
Subject: Re: RFC: Audit external function called indirectly via GOT
Date: Mon, 01 Jan 2018 00:00:00 -0000 [thread overview]
Message-ID: <CAJimCsFEOud5jX2ybV17FXj4mXLb9rUzXya5wmnENc0tiam+eA@mail.gmail.com> (raw)
In-Reply-To: <CAJimCsFfdnGWkvy2xxubGLa-jVmc+C9pgFYioxRnWNy=pM=vCg@mail.gmail.com>
>> I want to use both so that GOT is read-only after relocation in
>> normal case and the writable PLTGOT is only used for LD_AUDIT.
>
> But if the program isn't linked with relro, the PLTGOT entries remain
> writable and you have no need for both. If it's linked with immediate
> binding and relro, the PLTGOT entries become relro, and again you have
> no need for both. The only case where you can make an argument for
> both is when the program is linked with both relro and lazy binding.
> But I don't see why you need the additional security if you're not
> bothering to link with immediate binding.
Sorry, I meant to write "... if the program isn't linked with relro,
the *GOT* entries remain writable ...."
-cary
next prev parent reply other threads:[~2018-03-22 16:04 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-01 0:00 H.J. Lu
2018-01-01 0:00 ` Florian Weimer
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Florian Weimer
2018-01-01 0:00 ` Carlos O'Donell
2018-01-01 0:00 ` Florian Weimer
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Carlos O'Donell
2018-01-01 0:00 ` Florian Weimer
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Florian Weimer
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Cary Coutant
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Cary Coutant
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Cary Coutant
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Carlos O'Donell
2018-01-01 0:00 ` Florian Weimer
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Florian Weimer
2018-01-01 0:00 ` Cary Coutant
2018-01-01 0:00 ` Carlos O'Donell
2018-01-01 0:00 ` Cary Coutant
2018-01-01 0:00 ` Alan Modra
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Alan Modra
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Cary Coutant
2018-01-01 0:00 ` Cary Coutant [this message]
2018-01-01 0:00 ` H.J. Lu
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