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Re: x32 psABI draft version 0.2
> 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