From: "Michal Suchánek" <msuchanek@suse.de>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org,
Dimitri John Ledkov <dimitri.ledkov@canonical.com>
Subject: Re: [RFC] UBUNTU: [Config] y2038: Disable COMPAT and COMPAT_32BIT_TIME on ppc64le
Date: Fri, 24 Nov 2023 09:25:12 +0100 [thread overview]
Message-ID: <20231124082512.GW9696@kitsune.suse.cz> (raw)
In-Reply-To: <87sf4vrbl3.fsf@mail.lhotse>
On Fri, Nov 24, 2023 at 03:59:04PM +1100, Michael Ellerman wrote:
> Dimitri John Ledkov <dimitri.ledkov@canonical.com> writes:
> > BugLink: https://bugs.launchpad.net/bugs/2038587
> >
> > ppc64le is exclusively little endian and 64-bit, thus there is no need
> > for COMPAT_32BIT_TIME, nor COMPAT.
>
> To be pedantic, the ppc64le kernel does support running 32-bit little
> endian userspace in compat mode (CONFIG_COMPAT=y). It's a distro choice
> as to whether you support COMPAT. Notably there are two other major
> distros that don't support COMPAT for ppc64le, and the set of 32-bit LE
> software is effectively empty.
I have seen software that does not work when compiled 64bit so it would
build 32bit binary even on ppc64le and abuse the compat layer to run.
It quite rare, though.
Thanks
Michal
next prev parent reply other threads:[~2023-11-24 8:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-24 0:20 [RFC] UBUNTU: [Config] y2038: Disable COMPAT and COMPAT_32BIT_TIME on ppc64le Dimitri John Ledkov
2023-11-24 4:59 ` Michael Ellerman
2023-11-24 8:25 ` Michal Suchánek [this message]
2023-11-24 14:06 ` Dimitri John Ledkov
2023-11-24 14:05 ` Dimitri John Ledkov
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