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Message-ID: <CAAfSe-s=UFMvLfVq1xw1OuAwgdiyg-kcFa6ZyAUkkDLnTVuWmQ@mail.gmail.com>
Date: Wed, 31 Jul 2019 11:30:22 +0800
From: Chunyan Zhang <zhang.lyra@...il.com>
To: Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc: Linux ARM <linux-arm-kernel@...ts.infradead.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Lvqiang Huang <lvqiang.huang@...soc.com>
Subject: Re: [PATCH] ARM: check stmfd instruction using right shift
On Tue, 30 Jul 2019 at 19:02, Russell King - ARM Linux admin
<linux@...linux.org.uk> wrote:
>
> On Tue, Jul 30, 2019 at 03:18:31PM +0800, Chunyan Zhang wrote:
> > Gentle ping
> >
> > probably this patch was missed or entered into spam?
>
> Please submit it to the patch system, thanks.
Ok, thanks.
>
> >
> > On Mon, 22 Jul 2019 at 15:14, Chunyan Zhang <zhang.lyra@...il.com> wrote:
> > >
> > > From: Lvqiang Huang <Lvqiang.Huang@...soc.com>
> > >
> > > In the commit ef41b5c92498 ("ARM: make kernel oops easier to read"),
> > > - .word 0xe92d0000 >> 10 @ stmfd sp!, {}
> > > + .word 0xe92d0000 >> 11 @ stmfd sp!, {}
> > > then the shift need to change to 11.
> > >
> > > Fixes: ef41b5c92498 ("ARM: make kernel oops easier to read")
> > > Signed-off-by: Lvqiang Huang <Lvqiang.Huang@...soc.com>
> > > Signed-off-by: Chunyan Zhang <zhang.lyra@...il.com>
> > > ---
> > > arch/arm/lib/backtrace.S | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/arch/arm/lib/backtrace.S b/arch/arm/lib/backtrace.S
> > > index 7d7952e..926851b 100644
> > > --- a/arch/arm/lib/backtrace.S
> > > +++ b/arch/arm/lib/backtrace.S
> > > @@ -70,7 +70,7 @@ for_each_frame: tst frame, mask @ Check for address exceptions
> > >
> > > 1003: ldr r2, [sv_pc, #-4] @ if stmfd sp!, {args} exists,
> > > ldr r3, .Ldsi+4 @ adjust saved 'pc' back one
> > > - teq r3, r2, lsr #10 @ instruction
> > > + teq r3, r2, lsr #11 @ instruction
> > > subne r0, sv_pc, #4 @ allow for mov
> > > subeq r0, sv_pc, #8 @ allow for mov + stmia
> > >
> > > --
> > > 1.7.9.5
> > >
> >
>
> --
> RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
> FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
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