If compressed data is located in sectors at the end of the flash and
it's offset + input stream size > 0xFFFFFFFF, the uncompressing time
is very long, since processing of the stream is done bytewise (and
not blockwise) due to overflow in inflate_fast() while calculation
and checking for enough input available.
Check for this overflow condition and limit the available stream
input size to the actually max. possible input size. This fixes
the problem.
The issue is easily reproduceable by placing a gziped bitmap in flash,
e.g. at FFF80000, and running 'bmp' commands like 'bmp info FFF80000'
or 'bmp display FFF80000'. The uncompressing can take up to 3 sec.
whereas it should normaly take a fraction of a second. If the
'splashimage' environment variable points to this address, the
booting time also increases significantly.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
While looking to upgrade to zlib-1.2.5, the current mondo merge of
multiple files into a single was making things way more difficult
than it should have been. Hard to pick out what has been changed
to port it to U-Boot, been removed as useless, and bug fixes added
after the fact.
So split the single file up into the original file names, and merge
non-essential changes back from the original tree (for some reason,
style in code in a bunch of places was changed to U-Boot style even
though this isn't "U-Boot" code).
The original build style is retained -- we have a single zlib.c that
includes all the other files, and that is the only file we compile.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
