Re: Runlevels and opcodes

2002-09-27 Thread Ronald G Minnich
On 27 Sep 2002, Ryan Sommers wrote: > > *** But what does prevent a user-level process from executing > > wild instructions (RESET, traps, other dangerous instructions > > and undocumented features) ? > > I'm probably less knowledgeable then you are but in protected-mode > programming isn't the k

Re: Runlevels and opcodes

2002-09-27 Thread Ryan Sommers
On Fri, 2002-09-27 at 11:47, [EMAIL PROTECTED] wrote: > *** But what does prevent a user-level process from executing > wild instructions (RESET, traps, other dangerous instructions > and undocumented features) ? I'm probably less knowledgeable then you are but in protected-mode programming isn

Runlevels and opcodes

2002-09-27 Thread porte10
Runlevels and opcodes I am a bit familiar with the design of operating systems but i definitely lack practical experience so please apologize if i am confusing things ... Anyway i think the subject is likely to interest our readers ! On most modern operating systems, system calls provide