From: Jan Hubicka <hubicka@ucw.cz>
To: Jakub Jelinek <jakub@redhat.com>
Cc: Jan Beulich <JBeulich@novell.com>,
"H.J. Lu" <hjl.tools@gmail.com>, "H. Peter Anvin" <hpa@zytor.com>,
GCC Development <gcc@gcc.gnu.org>,
x32-abi@googlegroups.com, Binutils <binutils@sourceware.org>,
GNU C Library <libc-alpha@sourceware.org>
Subject: Re: x32 psABI draft version 0.2
Date: Thu, 17 Feb 2011 15:22:00 -0000 [thread overview]
Message-ID: <20110217152233.GB11346@atrey.karlin.mff.cuni.cz> (raw)
In-Reply-To: <20110217142916.GI13037@sunsite.ms.mff.cuni.cz>
> On Thu, Feb 17, 2011 at 08:35:26AM +0000, Jan Beulich wrote:
> > >>> On 16.02.11 at 21:04, "H. Peter Anvin" <hpa@zytor.com> wrote:
> > > On 02/16/2011 11:22 AM, H.J. Lu wrote:
> > >> Hi,
> > >>
> > >> I updated x32 psABI draft to version 0.2 to change x32 library path
> > >> from lib32 to libx32 since lib32 is used for ia32 libraries on Debian,
> > >> Ubuntu and other derivative distributions. The new x32 psABI is
> > >> available from:
> > >>
> > >> https://sites.google.com/site/x32abi/home
> > >>
> > >
> > > I'm wondering if we should define a section header flag (sh_flags)
> > > and/or an ELF header flag (e_flags) for x32 for the people unhappy about
> > > keying it to the ELF class...
> >
> > Thanks for supporting this!
> >
> > Besides that I also wonder why all the 64-bit relocations get
> > marked as LP64-only. It is clear that some of them can be useful
> > in ILP32 as well, and there's no reason to preclude future uses
> > even if currently no-one can imagine any.
> >
> > Furthermore, it seems questionable to continue to require rela
> > relocations when for all normal ones (leaving aside the 8- and 16-
> > bit ones) the addend can fit in the relocated field.
>
> REL is horrible pain, we shouldn't ever add new REL targets.
According to Mozilla folks however REL+RELA scheme used by EABI leads
to significandly smaller libxul.so size
According to http://glandium.org/blog/?p=1177 the difference is about 4-5MB
(out of approximately 20-30MB shared lib)
Honza
>
> Jakub
next prev parent reply other threads:[~2011-02-17 15:22 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-16 19:22 H.J. Lu
2011-02-16 20:04 ` H. Peter Anvin
2011-02-16 20:29 ` Roland McGrath
2011-02-16 20:35 ` Chris Metcalf
2011-02-16 20:39 ` Andrew Pinski
2011-02-16 20:46 ` H.J. Lu
2011-02-16 22:13 ` Chris Metcalf
2011-02-17 8:35 ` Jan Beulich
2011-02-17 12:14 ` H.J. Lu
2011-02-17 16:14 ` John Reiser
2011-02-17 17:59 ` Jakub Jelinek
2011-02-17 14:29 ` Jakub Jelinek
2011-02-17 15:22 ` Jan Hubicka [this message]
2011-02-17 15:30 ` H.J. Lu
2011-02-17 15:45 ` Jan Hubicka
2011-02-17 15:49 ` H.J. Lu
2011-02-17 16:10 ` Jan Beulich
2011-02-17 17:59 ` H.J. Lu
2011-02-18 8:10 ` Jan Beulich
2011-02-18 17:53 ` H.J. Lu
2011-02-18 20:32 ` Jan Hubicka
2011-02-21 8:04 ` Jan Beulich
2011-02-17 18:07 ` Jakub Jelinek
2011-02-17 19:56 ` H. Peter Anvin
2011-02-17 22:50 ` Jan Hubicka
2011-02-17 23:00 ` H. Peter Anvin
2011-02-17 23:07 ` Jakub Jelinek
2011-02-18 8:49 ` Jan Beulich
2011-02-17 18:14 ` Joseph S. Myers
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