[Vm-dev] Mars, stuck on callbacks (again)... need opinions

John M McIntosh johnmci at smalltalkconsulting.com
Thu Dec 23 22:49:40 UTC 2010

Well I"m not sure what is being suggested here, but on iOS a shared library is marked as read and executable, NOT writable. so you can't do self modifying code... 
Unless you are saying you'd like to on macintel generate arm code and stick it into a shared library for later loading and execution on iOS? 

On 2010-12-23, at 1:04 PM, Andreas Raab wrote:

> On 12/23/2010 12:47 PM, Igor Stasenko wrote:
>> it is possible (if someone provide a code), but i wonder why do you
>> need such extra loops?
>> It will give you nothing.
> Unless the platform does not allow making memory regions executable, as on, say, iOS. In which case the ability to generate code into a shared lib becomes suddenly very valuable.
> Cheers,
>  - Andreas
>> You could generate a native code and put it
>> into executable memory region,
>> instead of object memory, which could be then used to pass as callback
>> address to some external function.
>> Actually, if you look how NB callback test implemented - it does
>> exactly what i describing.
>> You can always use NB (or just AsmJit) for generating code and putting
>> it into static library or file..
>> but once it become static it is no longer interesting, because its
>> static (yeah.. tautology ;)

John M. McIntosh <johnmci at smalltalkconsulting.com>   Twitter:  squeaker68882
Corporate Smalltalk Consulting Ltd.  http://www.smalltalkconsulting.com

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