From: Carlos O'Donell <carlos@redhat.com>
To: Florian Weimer <fw@deneb.enyo.de>, "H.J. Lu" <hjl.tools@gmail.com>
Cc: Generic System V Application Binary Interface
<generic-abi@googlegroups.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: <3a203b82-1247-5538-4848-92c9227cc77e@redhat.com> (raw)
In-Reply-To: <87370txhr1.fsf@mid.deneb.enyo.de>
On 03/21/2018 03:04 PM, Florian Weimer wrote:
> * H. J. Lu:
>
>>> Could we ship a template for the PLT entries in ld.so instead? And if
>>> needed, map it from the file together with an address array, like this?
>>
>> This won't work since linker needs to know exactly PLT layout to generate
>> JUMP_SLOT relocations for LD_AUDIT.
>
> Why would we need JUMP_SLOT relocations? Couldn't we install suitable
> interceptors for GLOB_DAT relocations instead, as long as they resolve
> to external function symbols?
I think your suggestion might work, but why alter the existing behaviour which
users expect and is documented in countless linker text books?
Existing tooling to process such relocations and entries could remain unchanged
and we would continue to support LD_AUDIT.
What other benefits would we gain from your suggestion?
Cheers,
Carlos.
next prev parent reply other threads:[~2018-03-21 21:54 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 [this message]
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 ` H.J. Lu
2018-01-01 0:00 ` Carlos O'Donell
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 ` 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 ` 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 ` H.J. Lu
2018-01-01 0:00 ` Cary Coutant
2018-01-01 0:00 ` Cary Coutant
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 ` Alan Modra
2018-01-01 0:00 ` H.J. Lu
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