Re: [linuxsh-dev] [linux-sh:01255] Re: ROMable image

[Jesper S. <js...@re...>]

>>>>> "Greg" == Greg Banks <gb...@po...> writes:
Greg>   I tried a small test: the 59K of .data sections in my current
Greg> kernel image gzip's down to a measly 8K, which is pretty good
Greg> compression.  But a quick inspection reveals why: about 48K of
Greg> that 59K are zero bytes.  So I suspect there are a lot of
Greg> variables which could sensibly go into .bss instead of
Greg> cluttering up .data, even a compressed .data.  Once you consider
Greg> the code needed to uncompress the .data, it may well be that the
Greg> more useful optimisation would be to move variables to .bss
Greg> instead of compressing .data.  In any case I think it would be
Greg> useful to investigate.

Somewhat related to that, it may be possible to save some space by
rearranging sections - there are some pretty big alignments (8k & 4k)
in there which probably leave big holes in the image.

Jesper