From: bobduff@shell01.TheWorld.com   
      
   Philip Herron  writes:   
      
   > [A JIT compiler has to do the moral equivalent of dlopen(), take a   
   > chunk of data and make it be code, with everything in memory rather   
   > than in files.  On many architectures, you don't actually have to do   
   > anything since code and data are in the same address space so you   
   > can set a pointer to point to the code you just wrote and call it,   
   > but on others you do need some help from the system, e.g., on recent   
   > x86 where data pages are usually marked no-execute. -John]   
      
   Also, on some machines you might need to do some cache flushing.   
   Otherwise, the processor might execute old instructions.   
      
   - Bob   
   [Quite right -- it's very machine specific. -John]   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)