Re: Pax, DEP and Jumping into middle of instructions

Tim Roberts <spamtrap@[EMAIL PROTECTED]
> wrote in part:
> There is nothing magical about the beginning and ending
> of an instruction.  It's just a sequence of bytes that the
> CPU interprets.  When you make a jump, the CPU doesn't know
> or care whether it is the first byte of an instruction.
> It will just load and execute it.

While this is entirely true, I wonder how the Pentium4 and
its' predecoded "trace cache" would handle it.  Probably with
a long stall as the bytes were reloaded from memory (L2?) and
re-decoded.  Other CPUs should be able to draw from L1.

-- Robert