Re: [x86-64 psABI] RFC: Extend x86-64 psABI to support x32

H.J. Lu
2012-06-26T21:23:09Z

On Tue, Jun 26, 2012 at 2:11 PM, Mark Butler <butlerm@middle.net> wrote:
>
>> x32 is designed to replace ia32 where long is 32-bit, not x86-64.
>>
> I understand, but wouldn't L64P32 be much better in the long run? In terms
> of compatibility with LP64, and an LP64 kernel in particular?  The structure
> layouts of any structure that did not contain pointers would be identical,
> for example.  struct timeval, struct timespec, struct stat, and on and on...

Linux/x32 uses the same layout for struct timeval, struct timespec, struct stat,
as Linux/x86-64. It is orthogonal to L64 vs L32.

--
H.J.