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

H. Peter Anvin
2009-08-13T14:12:50Z

On 08/13/2009 02:30 AM, Albin Tonnerre wrote:
> 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().
>

I would go with the variant in the kernel, as being a known quantity.

Your __div0 function can just loop forever.

-hpa

--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.