dynamically written code problem

[Paolo Bonzini]

> > on my system, mmap is allocating in the 0x40000000 range, and malloc 
> > is allocating at the brk (around 0x08000000).  Is this different when 
> > exec-shield is activated?
> 
> Yes.  mmap with PROT_EXEC set attempts to allocate as low as possible,
> usually below the executable.
> mmap without PROT_EXEC allocates as high as possible, below the stack.

So at least my function does not lose execute protection if mmap was 
used with PROT_EXEC.  Thank you very much,

Paolo