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Date: Thu, 17 Feb 2011 16:10:00 -0000
From: "Jan Beulich" <JBeulich@novell.com>
To: "H.J. Lu" <hjl.tools@gmail.com>,"Jan Hubicka" <hubicka@ucw.cz>
Cc: "GCC Development" <gcc@gcc.gnu.org>,<x32-abi@googlegroups.com>,	 "Jakub Jelinek" <jakub@redhat.com>,	 "Binutils" <binutils@sourceware.org>,	 "GNU C Library" <libc-alpha@sourceware.org>,	 "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: x32 psABI draft version 0.2
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>>> On 17.02.11 at 16:49, "H.J. Lu" <hjl.tools@gmail.com> wrote:
> On Thu, Feb 17, 2011 at 7:44 AM, Jan Hubicka <hubicka@ucw.cz> wrote:
>>> > 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=3D1177 the difference is abo=
ut 4-5MB
>>> > (out of approximately 20-30MB shared lib)
>>>
>>> This is orthogonal to x32 psABI.
>>
>> Understood.  I am just pointing out that x86-64 Mozilla suffers from sta=
rtup
>> problems (extra 5MB of disk read needed) compared to both x86 and ARM EA=
BI
>> because x86-64 ABI is RELA only. If x86-64 ABI was REL+RELA like EABI is=
, we
>> would not have this problem here.
>>
>=20
> If people want to see REL+RELA in x32, they have to contribute codes.

That's exactly the wrong way round: First the specification has to allow
for (but not require) it, and only then does it make sense to write code.

Jan