<div class="gmail_quote">On Mon, Jul 7, 2008 at 10:19 PM, Andreas Raab <<a href="mailto:andreas.raab@gmx.de">andreas.raab@gmx.de</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="Ih2E3d">Craig Latta wrote:<br>
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> ...do the bootstrap: Instantiate the first process, its first context,<br>
> the first message. Run it in the simulator to set up the remaining<br>
> parts of the kernel image (Delay, ProcessorScheduler etc).<br>
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I guess I found that last sentence easier said than done. :)<br>
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It doesn't strike me as particularly difficiult but then I haven't tried it yet. What problems were you running into?<div class="Ih2E3d"><br>
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I don't even think the global lookup issue is all that hard. (I advocate having no system dictionary; keep each class literal in the name slot of the class itself, and have a means of traversing the class tree from a well-known starting point. Scanning through memory for the class and pool literals you want is straightforward.)<br>
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Actually, true *globals* (which for the bootstrap means only classes) are trivial to deal with: Since the skeleton is created first you have the oops for all the globals right there and then, so setting up a mapping that the compiler uses for these globals is utterly trivial. It's class and pool variables that are tricky because even Dictionary>>at: may not exist in the image that you're trying to compile so doing the lookup directly in there would be quite tricky. It would be doable if one assumed a particular organization of the classes (i.e., the n-th iVar is the dictionary of class vars) and then interpreted it externally but it seems like an unnecessary complication for an initial bootstrap.</blockquote>
<div><br>Oops. Late to the party. Ignore my earlier post. Yes, its trivial.<br><br> </div></div>