[Info-vax] [OT] Wirth style languages, was: Re: Obscure Ada compiler vendors?

[Stephen Hoffman]

On 2013-04-10 10:27:07 +0000, Paul Sture said:

> I have seen systems which were over-modular and they ran so slowly that
> there was no way they would ever hit production.  The worst example did
> dozens or even hundreds of indexed reads to display each line of 15 or
> so item lines on an enquiry screen.

Most any decision of significance in an OS project involves compromises 
and trade-offs.

A number of other and seemingly less-significant decisions can also 
conspire to screw you, too.

The system service vectors are seemingly purpose-built for trampoline 
attacks, and for preventing ASLR, for instance.

<http://www.cs.berkeley.edu/~daw/teaching/cs261-f07/reading/beyondsmashing.pdf>
<http://en.wikipedia.org/wiki/Address_space_layout_randomization>

When you're "green-fielding" an OS design, you also have to guess about 
the details of the hardware in five and ten years.


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