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Re: How best get rid of SELinux?



On Fri, 2007-09-21 at 13:37 -0500, Mike McCarty wrote:

> Usually[*], the NOP is the smallest instruction, so it may be used
> to nullify other instructions, all of which are made to be multiples
> of the size of a NOP. A jump type instruction needs at least
> an opcode and an address (even if only relative), so is usually
> larger than a NOP. On some machines, some short form of jump
> may be just one machine word (a couple of architectures come
> to mind, like the Z8000 for instance).
> 
> [*] I can't think of a counter example, and it wouldn't make sense
> for it to be otherwise.

The counter-example is a processor I used some time ago that included a
short jump instruction that was one word in length. That is, the JMP
instruction included the jump distance. I don't know if recent x86 has
such a thing.



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