[PATCH] ARM: Fix relocation if image end past uncompressed kernel end

[Nicolas Pitre]

On Thu, 21 Apr 2011, Tony Lindgren wrote:

> * Nicolas Pitre <nicolas.pitre at linaro.org> [110421 20:20]:
> > I found the bugger.  The problem was a bad stack alignment.
> 
> .. as this patch won't solve the n900 booting problem with zImage.
> With LZMA I'm still also getting "LZMA data is corrupt".

Hmmm......

Is it possible you have bad RAM?  In compressed/head.S, locate this 
code:

#ifdef CONFIG_AUTO_ZRELADDR
                @ determine final kernel image address
                mov     r4, pc
                and     r4, r4, #0xf8000000
                add     r4, r4, #TEXT_OFFSET
#else
                ldr     r4, =zreladdr
#endif

Right after that, simply override r4 with a physical address towards the 
end of the RAM, say 8MB before end of RAM (unless your decompressed 
kernel is larger than that).  That won't make a booting system, but at 
least you will be able to test the decompressor when loaded at various 
locations in memory without involving the relocation loop.


Nicolas