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From: Willy Tarreau <w@1wt.eu>
To: "Thomas Weißschuh" <thomas.weissschuh@linutronix.de>
Cc: "Thomas Weißschuh" <linux@weissschuh.net>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] tools/nolibc: MIPS: fix clobbers of 'lo' and 'hi' registers on different ISAs
Date: Sun, 8 Mar 2026 09:51:38 +0100	[thread overview]
Message-ID: <aa04moCBPbUI133N@1wt.eu> (raw)
In-Reply-To: <20260218-nolibc-mips-clobber-v1-1-f71009a00c90@linutronix.de>

On Wed, Feb 18, 2026 at 12:45:48PM +0100, Thomas Weißschuh wrote:
> Earlier MIPS64 ISAs still provide the 'lo' and 'hi' special registers.
> These are clobbered by system calls and need to be marked as such to
> avoid miscompilations.
> Also 32-bit ISAs from r6 on do not define the 'lo' and 'hi' registers.
> 
> Handle all different combinations of ABI and ISAs.
> 
> Fixes: a6a2a8a42972 ("tools/nolibc: MIPS: add support for N64 and N32 ABIs")
> Fixes: 66b6f755ad45 ("rcutorture: Import a copy of nolibc")
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>

I trust that you've contemplated way more doc than me on that topic, so
obviously:

Acked-by: Willy Tarreau <w@1wt.eu>

Thanks,
Willy

  reply	other threads:[~2026-03-08  8:51 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-18 11:45 [PATCH] tools/nolibc: MIPS: fix clobbers of 'lo' and 'hi' registers on different ISAs Thomas Weißschuh
2026-03-08  8:51 ` Willy Tarreau [this message]
2026-03-14 18:01 ` Maciej W. Rozycki
2026-03-17  8:09   ` Thomas Weißschuh

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