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From: Alistair Francis <alistair23@gmail.com>
To: Joseph Myers <joseph@codesourcery.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>,
	"linux-snps-arc@lists.infradead.org"
	<linux-snps-arc@lists.infradead.org>,
	"libc-alpha@sourceware.org" <libc-alpha@sourceware.org>
Subject: Re: ARCv2 Public PRM (was Re: [PATCH v2 00/15] glibc port to ARC processors)
Date: Thu, 6 Feb 2020 14:06:49 -0800
Message-ID: <CAKmqyKODf8rBqhV708hzMMcdbEZEQrf1T2ABGi-3KLSwWozqNA@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.21.2002062149360.22384@digraph.polyomino.org.uk>

On Thu, Feb 6, 2020 at 1:51 PM Joseph Myers <joseph@codesourcery.com> wrote:
>
> On Thu, 6 Feb 2020, Vineet Gupta wrote:
>
> > >  If
> > > you require Linux 5.1 or later for the port then all or nearly all the
> > > architecture-independent pieces required for a 32-bit port supporting only
> > > 64-bit times should be covered by the RV32 patches, which I think are
> > > quite close to being ready to go into glibc, though you'd need to watch
> > > out for any (new or existing) #ifdef conditionals that might try to use
> > > 32-bit-time syscalls if they exist (which they don't on RV32) - and that
> > > would not prevent supporting older kernel versions later if desired, as
> > > the Y2038 support gets built out (including, in particular, the support
> > > for falling back to 32-bit-time syscalls in functions for 64-bit-time
> > > interfaces).
> >
> > Ok I see patches in flight on the mailing list. Would it make sense for me to
> > start off in parallel with ARC port which will take it's due course of review and
> > rework and in that process upstream y2038 work settles down and I then
> > rebase/switch ARC to that. Or would rather wait for upstream to settle down and
> > then I adjust/post ?
>
> I'd suggest posting patches that are on top of the RV32 ones (maybe
> there's a git tree with RV32 changes to current glibc that could be used),
> and that only support Linux 5.1 and later (so you don't need anything much
> of the Y2038 support beyond what's in the RV32 patches).

Go for it!

My working branch is here:
https://github.com/alistair23/glibc/tree/alistair/rv32.next

My latest RFC branch is here:
https://github.com/alistair23/glibc/tree/alistair/rv32.rfc6

Alistair

>
> --
> Joseph S. Myers
> joseph@codesourcery.com

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  reply index

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-30  1:25 [PATCH v2 00/15] glibc port to ARC processors Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 01/15] ARC: add definitions to elf/elf.h Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 02/15] ARC: ABI Implementation Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 03/15] ARC: startup and dynamic linking code Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 04/15] ARC: Thread Local Storage support Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 05/15] ARC: Atomics and Locking primitives Vineet Gupta
2019-01-30  8:28   ` Andreas Schwab
2019-01-30 17:40     ` Vineet Gupta
2019-02-01  1:57       ` Need for arch pthread-offsets.h (was Re: [PATCH v2 05/15] ARC: Atomics and Locking primitives) Vineet Gupta
2019-02-04 10:02         ` Andreas Schwab
2019-01-30 21:04     ` [PATCH v2 05/15] ARC: Atomics and Locking primitives Joseph Myers
2019-01-30 21:35       ` Vineet Gupta
2019-01-30 21:50         ` Joseph Myers
2019-01-30 22:02           ` Vineet Gupta
2019-01-30 22:05             ` Joseph Myers
2019-01-30  1:25 ` [PATCH v2 06/15] ARC: math soft float support Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 07/15] ARC: Linux Syscall Interface Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 08/15] ARC: Linux ABI Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 09/15] ARC: Linux Startup and Dynamic Loading Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 10/15] ARC: ABI lists Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 11/15] ARC: Update syscall-names.list for ARC specific syscalls Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 12/15] ARC: Build Infrastructure Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 13/15] build-many-glibcs.py: Enable ARC builds Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 14/15] NEWS: mention ARC port Vineet Gupta
2019-01-30  1:25 ` [PATCH v2 15/15] make-syscalls.sh: fix comment referencing syscall-template Vineet Gupta
2019-01-30  2:20   ` Joseph Myers
2019-01-30  2:29 ` [PATCH v2 00/15] glibc port to ARC processors Joseph Myers
2019-01-30 18:15   ` Vineet Gupta
2019-01-30 21:19     ` Joseph Myers
2020-01-17 19:34     ` ARCv2 Public PRM (was Re: [PATCH v2 00/15] glibc port to ARC processors) Vineet Gupta
2020-01-17 21:56       ` Joseph Myers
2020-02-06 17:19         ` Vineet Gupta
2020-02-06 21:51           ` Joseph Myers
2020-02-06 22:06             ` Alistair Francis [this message]
2020-02-06 22:41               ` Vineet Gupta
2020-02-09 12:27                 ` Lukasz Majewski

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