Re: Precompiled multiplatform code (ARMxPC)

[KHMan <keinhong@...>]

Rob Kendrick wrote:
> On Mon, 10 Aug 2009 13:29:18 -0300
> "Saulo Tauil" <saulot@muitofaciltec.com.br> wrote:
>
> > The terminals have little memory, low cpu clock and lack of space.  
>
> Given that compiled Lua is often /larger/ than the source, you may
> find that leaving the compiler in and gzipping and/or using something
> like LuaSrcDiet saves more space, depending on your exact circumstances.
>
> > The portability of uncompiled code is a security issue too, since I
> > want avoid code manipulation by third party. Initially this
> > precompiled code will be remotely transferred to the terminals.  
>
> Compiled Lua offers no security advantages beyond preventing casual
> snooping.  Anybody who wants to break it will.  And quite easily.

I think he means one of those lower-end 32-bit ARMs. They probably 
have about 8-32KB internal SRAM. Everything runs on-chip, and the 
program memory can probably be protected. You can upload your 
programs as firmware, with a bootstrapper that can probably 
include some sort of security encryption. Can't really do the 
compilation or interpretation front-end on-chip.

There are at least two broad kinds of ARM MCUs, and I don't 
believe Saulo is talking about the kind that can run Linux.

--
Cheers,
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia