Upcoming support for Cris V32 architecture

[Joakim Tjernlund]

> 
> 
> I'm planning to introduce support for the newest family of the Cris 
> architecture (dubbed Crisv32, used in the Etrax FS chip) into 
> the official 
> uClibc release. We already have a working in-house port, but 
> it is based 
> on the uClibc 0.9.27 release, and needs a bit of work in 
> order to bring it 
> into line with subsequent developments of uClibc. This also includes 
> testing that the existing Cris arch works properly with uClibc; after 
> browsing the subervsion tree I suspect that code changes have 
> introduced 
> issues that need testing and working out.

Yes, CRIS has been broken for quite a while.

> 
> I won't have the opportunity to get started on this for a 
> while (like, a 
> couple of months). I was wondering if there are any 
> indications for when 
> the next uClibc release (0.9.29 ?) will be?

I think that next relese will be when NPTL is finished, don't know 
when that will be. Probably a few months. 

> 
> My plan is to start by synchronizing our existing Crisv32 
> efforts with the 
> latest official uClibc release, and then move on from there, so that 
> Crisv32 support can be included in the next official uClibc 
> release, with 
> any luck. That way I can run tests for stability based on the latest 
> official release before going on to the bleeding edge.

I think you should base any work on current SVN. CRIS badly needs a new maintainer as the old
ones has stopped working on uClibc it seems. Ask Erik for commit access for SVN and start with
getting the current CRIS cpu supported. I think that will be a fairly easy task, mostly
updating crt1.S to the new ABI and fix ldso to match(the asm code in dl-startup.h). The new ABI 
follows glibc very closely so you should be able to copy code from there and tweak it to map 
into uClibc.

> 
> /Ricard
> --
> Ricard Wolf Wanderlöf                           ricardw(at)axis.com
> Axis Communications AB, Lund, Sweden            www.axis.com
> Phone +46 46 272 2016                           Fax +46 46 13 61 30
>