Re: [OT] Debugger protection (was: Implementing Licensing ...)
Re: [OT] Debugger protection (was: Implementing Licensing ...)
- Subject: Re: [OT] Debugger protection (was: Implementing Licensing ...)
- From: Ondra Cada <email@hidden>
- Date: Thu, 8 Apr 2004 23:57:43 +0200
John,
On Thursday, Apr 8, 2004, at 23:46 Europe/Prague, John Stiles wrote:
Self-modifying code would of cause not be very good for non-x86
platforms.
Why is that? I don't see any reasons (aside from the obvious
horribleness of it) why it's an x86 specific thing... It was
certainly a fairly common thing to do back in my 68000 days.
Just try that on Mac in OS X, you'll see immediately ;)
You can do it just fine if you make a few handy Mach calls first.
Well try _that_ and you'll see what separate code and data cache really
mean ;) That was, IIRC, a very big hurdle when 68040 (or was it 68030?
Can't remember, too long ago) came: a vast majority of programs which
used self-modifying code just ceased working ;)))
---
Ondra Hada
OCSoftware: email@hidden
http://www.ocs.cz
private email@hidden
http://www.ocs.cz/oc
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