From: dave.martin@linaro.org (Dave Martin)
To: linux-arm-kernel@lists.infradead.org
Subject: Building of arch/arm/plat-mxc/ssi-fiq.S failed w/ THUMB2 enabled?
Date: Fri, 20 Jan 2012 12:00:03 +0000 [thread overview]
Message-ID: <20120120120003.GB2046@linaro.org> (raw)
In-Reply-To: <20120120115216.GK1068@n2100.arm.linux.org.uk>
On Fri, Jan 20, 2012 at 11:52:17AM +0000, Russell King - ARM Linux wrote:
> On Fri, Dec 02, 2011 at 11:24:18AM +0100, Uwe Kleine-K?nig wrote:
> > On Fri, Dec 02, 2011 at 06:01:08PM +0800, Eric Miao wrote:
> > > Hi Dave & Sascha,
> > >
> > > I checked the log of this file, found a THUMB2 related changes, yet
> > > I'm still having the failure below, can you help do a quick check?
> > the problem is that in Thumb most commands don't work with r8-r15
> > because there are only three bits used to encode them. This is
> > unfortunate as the other registers are not banked for FIQ.
> >
> > The best possibility I see is to save some unbanked registers to the
> > banked registers on entry and restore them on exception exit.
>
> Or always build this as ARM code.
That should work, sure -- I prefer to keep the number of instances where
we need to do this to a minimum if we can, though.
Cheers
---Dave
next prev parent reply other threads:[~2012-01-20 12:00 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-02 10:01 Building of arch/arm/plat-mxc/ssi-fiq.S failed w/ THUMB2 enabled? Eric Miao
2011-12-02 10:24 ` Uwe Kleine-König
2011-12-02 13:39 ` Dave Martin
2012-01-20 11:22 ` Dave Martin
2012-01-20 11:56 ` Russell King - ARM Linux
2012-01-20 15:02 ` Dave Martin
2012-01-20 11:52 ` Russell King - ARM Linux
2012-01-20 12:00 ` Dave Martin [this message]
2012-01-23 11:59 ` Sascha Hauer
2012-01-25 14:06 ` Matt Sealey
2012-01-25 14:34 ` Russell King - ARM Linux
2012-01-25 17:23 ` Sascha Hauer
2012-01-30 13:57 ` Dave Martin
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