From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: gcc miscompiles csum_tcpudp_magic() on ARMv5
Date: Thu, 12 Dec 2013 15:43:09 +0000 [thread overview]
Message-ID: <20131212154309.GR4360@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20131212152849.GC31816@1wt.eu>
On Thu, Dec 12, 2013 at 04:28:49PM +0100, Willy Tarreau wrote:
> On Thu, Dec 12, 2013 at 03:18:18PM +0000, M?ns Rullg?rd wrote:
> > The ABI for function calls sign/zero-extends all arguments prior to the
> > call.
>
> OK then that's pretty clear, there's no ambiguity, thanks for the precision.
Let's be clear about this: there is no GCC bug here - the kernel code
unfortunately what is buggy. asm() input arguments are not subject to
this promotion irrespective of the ABI.
next prev parent reply other threads:[~2013-12-12 15:43 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-12 12:14 gcc miscompiles csum_tcpudp_magic() on ARMv5 Maxime Bizon
2013-12-12 12:40 ` Russell King - ARM Linux
2013-12-12 13:36 ` Maxime Bizon
2013-12-12 13:48 ` Måns Rullgård
2013-12-12 14:10 ` Maxime Bizon
2013-12-12 14:19 ` Willy Tarreau
2013-12-12 14:28 ` Maxime Bizon
2013-12-12 14:42 ` Måns Rullgård
2013-12-12 14:52 ` Maxime Bizon
2013-12-12 14:58 ` Måns Rullgård
2013-12-12 15:00 ` Russell King - ARM Linux
2013-12-12 15:26 ` Maxime Bizon
2013-12-12 15:07 ` Willy Tarreau
2013-12-12 15:18 ` Måns Rullgård
2013-12-12 15:28 ` Willy Tarreau
2013-12-12 15:43 ` Russell King - ARM Linux [this message]
2013-12-12 15:50 ` Måns Rullgård
2013-12-12 14:37 ` Måns Rullgård
2013-12-12 14:40 ` Maxime Bizon
2013-12-12 14:47 ` Måns Rullgård
2013-12-12 14:26 ` Måns Rullgård
2013-12-12 14:48 ` Russell King - ARM Linux
2013-12-12 15:00 ` Måns Rullgård
2013-12-12 15:04 ` Maxime Bizon
2013-12-12 15:41 ` Russell King - ARM Linux
2013-12-12 16:04 ` Måns Rullgård
2013-12-12 16:04 ` Willy Tarreau
2013-12-12 16:47 ` Russell King - ARM Linux
2013-12-12 17:11 ` Willy Tarreau
2013-12-12 17:20 ` Russell King - ARM Linux
2013-12-12 17:35 ` Willy Tarreau
2013-12-12 18:07 ` Nicolas Pitre
2013-12-12 22:30 ` Maxime Bizon
2013-12-12 22:36 ` Russell King - ARM Linux
2013-12-12 22:44 ` Maxime Bizon
2013-12-12 22:48 ` Russell King - ARM Linux
2013-12-12 17:34 ` Maxime Bizon
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