From: "H.J. Lu" <hjl.tools@gmail.com>
To: Michael Matz <matz@suse.de>
Cc: Rich Felker <dalias@libc.org>, Cary Coutant <ccoutant@gmail.com>,
"Carlos O'Donell" <carlos@redhat.com>,
Florian Weimer <fweimer@redhat.com>,
Szabolcs Nagy <nsz@port70.net>, Jan Beulich <JBeulich@suse.com>,
Binutils <binutils@sourceware.org>,
gnu-gabi@sourceware.org
Subject: Re: RFC: Add GNU_PROPERTY_NEED_PHDRS
Date: Mon, 01 Jan 2018 00:00:00 -0000 [thread overview]
Message-ID: <CAMe9rOpci5JEbSFZp6ASrHa4R0qGCNY9J2f1umjH8VT8TDdkpg@mail.gmail.com> (raw)
In-Reply-To: <alpine.LSU.2.21.1810021536550.7867@wotan.suse.de>
On Tue, Oct 2, 2018 at 8:38 AM Michael Matz <matz@suse.de> wrote:
>
> Hi,
>
> On Tue, 2 Oct 2018, H.J. Lu wrote:
>
> > > Yes, and it's a hack. This section isn't necessary, it merely is the
> > > easiest (?) way you found to force ld to create the PT_LOAD segment
> > > you want. What about linker scripts that filter out all .note
> > > sections? You _still_ want the phdrs to be mapped in that case. You
> > > basically replace the current state (where the phdrs are mapped by
> > > accident) with a different state that still only works by accident.
> > > It would be better to make this work by design not accident.
> >
> > If linker script discards a section, all bets are off. Anything can
> > happen.
>
> I disagree, but even if I'd agree your solution still is more accidental
> than by design. You want to guarantee something about program headers, so
> any solution that doesn't do anything specific about/with program headers
> is similarly accidental.
>
Nothing is guaranteed when linker script is used since anything can happen
with linker script.
--
H.J.
next prev parent reply other threads:[~2018-10-02 15:44 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-01 0:00 H.J. Lu
2018-01-01 0:00 ` Michael Matz
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Michael Matz
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Michael Matz
2018-01-01 0:00 ` H.J. Lu [this message]
2018-01-01 0:00 ` Michael Matz
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Cary Coutant
2018-01-01 0:00 ` Alan Modra
2018-01-01 0:00 ` Cary Coutant
2018-01-01 0:00 ` Alan Modra
2018-01-01 0:00 ` Cary Coutant
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Rich Felker
2018-01-01 0:00 ` H.J. Lu
2018-01-01 0:00 ` Alan Modra
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