linux-kernel - Re: [PATCH v2 0/4] tools/nolibc: MIPS: entrypoint cleanups and N32/N64 ABIs

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Message-ID: <20250326205434.bPx_kVUx@breakpoint.cc>
Date: Wed, 26 Mar 2025 21:54:34 +0100
From: Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
To: Thomas Weißschuh <linux@...ssschuh.net>
Cc: Willy Tarreau <w@....eu>, Shuah Khan <shuah@...nel.org>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	"Maciej W. Rozycki" <macro@...am.me.uk>,
	linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
	linux-mips@...r.kernel.org
Subject: Re: [PATCH v2 0/4] tools/nolibc: MIPS: entrypoint cleanups and
 N32/N64 ABIs

On 2025-02-25 18:02:34 [+0100], Thomas Weißschuh wrote:
> Introduce support for the N32 and N64 ABIs. As preparation, the
> entrypoint is first simplified significantly. Thanks to Maciej for all
> the valuable information.
> 
> Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>

Tested-by: Sebastian Andrzej Siewior <sebastian@...akpoint.cc> [ICT Loongson-3]

mips32le works as-is.
For mips64le I had to s/-march=mips64r6/-march=mips64r2 to match the
ABI. Which makes me wonder: Why do do we need to pass -march here and
can't rely on toolchain defaults?

Sebastian