Rockbox mail archiveSubject: Brothers in ARMs
Brothers in ARMs
From: Daniel Stenberg <daniel_at_haxx.se>
Date: Mon, 28 Oct 2002 17:20:17 +0100 (MET)
Björn and I had some time to talk during the weekend when we saw the sun and
felt the warmth of southern Spain on a company trip.
Some things we think might bring happiness:
Loadable Module Support (in a limited sense)
We were thinking that we rip out all parts of Rockbox that can be seen as
separate applications. Games, demos, text viewer, etc. All applications
will be linked to separate binary chunks. (.rock files)
We then reserve ~25K (or something) of memory and allow applications to get
loaded at that fixed address and run.
The .rock files are *strictly* only for the exact same version of the main
firmware. We were planning on ensuring this by having the Makefile read the
date as seconds and use that for a simple 32bit version number check when
we load .rock files.
The .rock files are linked for the static, fixed address where those 25K
are saved for us.
This allow all applications full access to all APIs without hassle. It does
force an upgrade to a given Rockbox version to include the set of .rock
files that follow it. There's no way to dynamicly build .rock files and add
them without rebuilding the full firmware.
Common Application Buffer Area
Since most applications need and use a buffer area for various operations,
we can make all M applications use one single bigger one instead. Today, we
have each application use their own N kilobytes, that then occupies N * M
-- Daniel "Bagder" Stenberg -- http://rockbox.haxx.se/Received on 2002-10-28