[PATCH] Clean up ARM compressed loader

[Hector Martin]

Russell King - ARM Linux wrote:
> On Wed, Feb 24, 2010 at 06:34:49PM -0500, Nicolas Pitre wrote:
>> What about simply not compiling the decompressor with -fPIC when using 
>> ZBOOT_ROM=y?  That would certainly solve the problem with the only 
>> restriction that such kernel images won't be bootable from RAM which is 
>> probably an acceptable compromize.
> 
> Unfortunately, that doesn't solve the stack-bashing with ZBOOT_ROM=n.

Yes it does, that's exactly what my first version of the patch did. Once
you get rid of the partial relocation used for ROM builds (with split
text/bss) you don't need -Dstatic=, and once you get rid of that you
solve the stack-bashing. The ROM build becomes a bog standard
non-relocatable ROM image (with the usual LMA/VMA linker script stuff to
copy initialized data to RAM), and the RAM build becomes a bog standard
relocatable image (a single contiguous blob including
text/rodata/data/bss) that doesn't suffer from any issues when you move
it around.

-- 
Hector Martin (hector at marcansoft.com)
Public Key: http://www.marcansoft.com/marcan.asc