[GSOC] Reliable multiarchitecture support

[Philippe Ombredanne]

On Wed, Feb 26, 2014 at 2:19 PM, Edson Ticona
<edson.ticona at jro.igp.gob.pe> wrote:
> My name is Edson Ticona, I am going to start my master studies in
> computer science in Universidade Estadual de Campinas, Brazil (I
> already have been accepted). I am currently working on the Jicamarca
> Radio Observatory in Peru. These months I have been working with an
> application for particle simulation that was written to run in Mac and
> I had to adapt it to run in Linux. I found strace really useful for
> completing my task because the app used some Mac specific libraries
> that I had to replace.
> Looking for the ideas page I would like to work on the reliable
> multiarchitecture support.
> I have experience developing kernel modules and started to read the
> strace base code and I would appreciate some feedback about what
> additional documentation might be useful.

Hi Edson!
and thank you for showing up interest.
About the reliable multiarch support project idead(and this may be
useful for others student considering this idea too), grep the code
for personality and PERSONALITIES.
This should give you some ideas of the problem: for each os that
supports executing multiple personalities -- typically 32 and 64
variants -- there are a lot of preprocessors conditionals. The code to
handle this is scattered especially in syscall.c ...
I think Dmitry's idea would be to refactor such that we have a clean
set of functions for a given personality grouped together that is
overall simpler to read and maintain.
Possibly using one .c per personality?

Dmitry, please elaborate.

As for testing on multiple architectures, check the qemu_multiarch_testing dir.
-- 
Philippe Ombredanne