[U-Boot-Users] [rfc] warning about overlapping regions whenbooting with bootm

[Robin Getz]

On Sat 16 Feb 2008 18:06, Wolfgang Denk pondered:
> In message <200802160259.32371.vapier at gentoo.org> you wrote:
> > we semi-frequently get users who try to boot an image on top of itself
> and
> > when when things crash, dont realize why.  i put together this quick
> little
> > warning, but i'm guessing that Wolfgang's answer is "don't bloat the
> code for
> > stupid people" ...
> 
> Indeed I reject the patch as is, but not because I think it would be
> not useful, but rather because it is IMHO not correct. 
> 
> The thing is that images *may* overlap, at least a bit. When the  de-
> compressor is running, it starts from the beginning of the compressed
> image  and progrsses towards the end. The already preocessed parts of
> the image are not neede dany longer - if they later  get  overwritten
> by  umcompressed  code  this does no hard. Problems arise only if the
> write pointer catches up with the read pointer.

Hmm...

I always thought that when decompressing a uImage, that the entry point was 
stored in the header, (at the beginning of the file) and was read after the 
decompression took place - is that wrong?

-Robin