mmap implementation for ANON mapping with desired address

[Sergey Platonov]

Hello all, 

We at gapfruit are also interested in golang runtime support and would
like to invest some time into it. 
@Alexander, thank you for paving the way for golang support on Genode.
Now might be a good time to help to solve some of the remaining issues,
so we can keep up the momentum. Will it be ok if we join for a while? We
will need some time to dive into the work you have done already and
evaluate how much time we can invest. We will be glad to discuss the
issues you think we can help with. 

Sincerely,
Sergey

---
Sergey Platonov 
gapfruit AG
Baarerstrasse 135
6300 Zug
+41 762 444 560
sergey.platonov at gapfruit.com 

Alexander Tormasov via users писал 23.11.2020 09:26:

> Hello Norman,
> I make once again attempt to implement the mmap with MAP_FIXED|MAP_ANON
> Now I think that it is closer to what I need for golang runtime, at least it works here.
> Could you take a look?
> 
> Due to specific of my tests it appears in 2 patches to genode master (Oct 23 2020):
> https://github.com/tor-m6/genode/commit/0aa7bb95ce451dc99d2cb76b1a4da09d64783a98
> and 2 files (repos/libports/lib/symbols/libc and repos/ports/src/noux-pkg/go_app/anon_mmap.cc with main algorithm) from here
> https://github.com/tor-m6/genode/commit/0248ae78851833cfef64068e99764f4fddd2294b
> 
> (sorry, still have some whitespaces and code style changes in patches)
> 
> Question: is it worth to spend more efforts to bring it to the mainstream genode?
> or continue keeping them in the private repository as now?
> 
> Same question for golang support…
> It can be potentially stored in world repo - is it worth to spend efforts?
> May be someone interested to takeover this work?
> 
> Sincerely,
> Alexander
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