From Newsgroup: comp.arch
On Mon, 04 May 2026 18:06:18 GMT, MitchAlsup
<
[email protected]d> wrote:
Headers are nothing more than mode-bits that change every block of code.
Yes and no.
Yes: and if I have two mode bits, suddenly I get to fit 20 pounds of
sand in my 5 pound bag.
No: because the instruction stream is composed of 256-bit instruction
blocks, aligned on 256-bit boundaries, and the header always and only
appears at the beginning of a block...
A hacker can't branch into code with the mode bits set wrong to make
it execute in a way that wasn't intended.
Thus, if "Mode Bits Bad", then use headers instead!
John Savard
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