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From: henry@utzoo.UUCP (Henry Spencer)
Newsgroups: comp.os.minix
Subject: Re: Memory handling in MINIX ?
Message-ID: <7601@utzoo.UUCP>
Date: Sat, 31-Jan-87 23:09:06 EST
Article-I.D.: utzoo.7601
Posted: Sat Jan 31 23:09:06 1987
Date-Received: Sat, 31-Jan-87 23:09:06 EST
References: <5490004@nucsrl.UUCP> <254@hqda-ai.UUCP>, <772@vaxb.calgary.UUCP>
Organization: U of Toronto Zoology
Lines: 11

> Does anyone know how difficult it would be to make MINIX totally 
> secure against crashes by programs written only in C?

Barring gross modifications to the compiler and a major loss of efficiency
in the generated code, it's impossible given 8088 or 8086 hardware.  For
Pascal it could be done, but C lets you do too many dirty things like
pointer arithmetic.  To do it properly you'd need an MMU which supports
protection as well as relocation, i.e. a 286 or 386.
-- 
Legalize			Henry Spencer @ U of Toronto Zoology
freedom!			{allegra,ihnp4,decvax,pyramid}!utzoo!henry