Re: [PATCH 4/6] Add support for LZO-compressed kernels for ARM

Albin Tonnerre
2009-08-13T09:30:40Z

On Tue, Aug 11, 2009 at 09:31:25AM -0700, H. Peter Anvin wrote :
> On 08/11/2009 09:27 AM, Albin Tonnerre wrote:
> >
> > So I guess the only options left are either define a dummy raise() function, or
> > get rid of the divisions like Alain Knaff did in his patch ?
> >
>
> Define a dummy raise, get rid of the divisions, or provide your own
> division function (there is probably one in the kernel already...)

Yes, there's such a function in arch/arm/lib/lib1funcs.S, which in turns
requires the __div0 symbol, defined in arch/arm/kernel/traps.c, and this one
cannot be used as it brings plenty of symbols that aren't available in the
pre-boot environment. So anyway, we have to define our own symbols there. Either
we use libgcc and define raise(), or lib1funcs and define __div0().

Russell, what's your take on this ?

Regards,
--
Albin Tonnerre, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.