Re: [Tinycc-devel] Porting TCC to RTLinux

[Basile STARYNKEVITCH]

Le Wed, Nov 22, 2006 at 12:25:22PM -0500, Calin A. Culianu écrivait/wrote:
> 
> Hi,
> 
> I am trying to get tinycc-0.9.23 to exist as an embedded facility in the 
> linux kernel.
> 
> Sound crazy?  Want to know why?
> 
> Well, the reason for this is that I am writing a realtime linux control 
> application that runs in kernel context (under rtlinux).  My control 
> application dynamically generates a turing machine (basically a finite 
> state machine with memory and variables) which then gets run as a realtime 
> task.

 
> Anyway, so I need to be able to generate C code and compile it in the 
> kernel.


If you want to generate code dynamically, there are other alternatives
than generating C and compiling it (even with a fast, but not very
efficient, compiler like tcc).

You could generate code in some other low level language. In
particular, C-- has been designed for that (it is a language designed
to be generated, not human written [1]).  Also LLVM [2] might be
interesting for you.

You could use some machine code gneneration toolkit, like GNU
lightning [3,4] or libjit [5]. Or some VM with JIT inside like Parrot [6]

Given what I understand of your goals, I would avoid generating source
code, and use lightning or perhaps libjit. BTW, lightning is certainly
usable with a very shallow stack. (But it might not have been ported
to AMD64).

References
1. http://cminusminus.org/
2. http://llvm.org/
3. https://savannah.gnu.org/projects/lightning/ 
4. http://www.gnu.org/software/lightning/lightning.html 
5. http://www.southern-storm.com.au/libjit.html
6. http://www.parrotcode.org/
-- 
Basile STARYNKEVITCH         http://starynkevitch.net/Basile/ 
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