From: "H.J. Lu" <hjl.tools@gmail.com>
To: x32-abi@googlegroups.com
Cc: discuss@x86-64.org, GCC Development <gcc@gcc.gnu.org>,
Binutils <binutils@sourceware.org>,
GNU C Library <libc-alpha@sourceware.org>,
GDB <gdb@sourceware.org>
Subject: Re: [x86-64 psABI] RFC: Extend x86-64 psABI to support x32
Date: Tue, 26 Jun 2012 19:48:00 -0000 [thread overview]
Message-ID: <CAMe9rOqhnmcUhjO8SH6Ggz-VmyGFyuDrMHJU27HjKV+UM1RASA@mail.gmail.com> (raw)
In-Reply-To: <ccd4a6ab-f279-477f-b48b-94b8f4afd37d@googlegroups.com>
On Tue, Jun 26, 2012 at 12:36 PM, Mark Butler <butlerm@middle.net> wrote:
> On Monday, May 14, 2012 11:31:11 AM UTC-6, H.J. wrote:
>>
>> Support for the x32 psABI:
>>
>> http://sites.google.com/site/x32abi/
>>
>> is added in Linux kernel 3.4-rc1. X32 uses the ILP32 model for x86-64
>> instruction set with size of long and pointers == 4 bytes. X32 is
>> already supported in GCC 4.7.0 and binutils 2.22...Here is a
>> patch to extend x86-64 psABI for x32. Any comments?
>>
>
> May I ask why the decision was made to use ILP32 instead of L64P32? The
> latter would seem to avoid lots of porting problems in particular. And if
> porting difficulties are the major complained about x32, is it really too
> late to switch? Thanks - mdb
x32 is designed to replace ia32 where long is 32-bit, not x86-64.
--
H.J.
next prev parent reply other threads:[~2012-06-26 19:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-14 17:31 H.J. Lu
2012-05-14 17:34 ` H. Peter Anvin
2012-05-14 17:44 ` H.J. Lu
2012-05-15 16:08 ` [discuss] " Michael Matz
2012-05-15 16:18 ` H.J. Lu
2012-05-17 19:50 ` H.J. Lu
[not found] ` <ccd4a6ab-f279-477f-b48b-94b8f4afd37d@googlegroups.com>
2012-06-26 19:48 ` H.J. Lu [this message]
2012-06-26 19:53 ` H. Peter Anvin
[not found] ` <af4adaed-508a-439f-92db-21d4385d316e@googlegroups.com>
2012-06-28 21:06 ` H. Peter Anvin
[not found] ` <69b1606d-6150-46eb-a426-93bfad19e7a2@googlegroups.com>
2012-06-26 21:23 ` H.J. Lu
[not found] ` <bde2af16-b04e-4e17-a22e-3fe0941e2496@googlegroups.com>
2012-06-27 12:02 ` H.J. Lu
2012-06-27 18:24 ` Magnus Fromreide
2012-06-27 18:29 ` H.J. Lu
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