the_dunk_tank
It's the dunk tank.
This is where you come to post big-brained hot takes by chuds, libs, or even fellow leftists, and tear them to itty-bitty pieces with precision dunkstrikes.
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While it doesn’t matter if arm(r)’s designs have these specific bits in them because no one is using a basic straight off the rack arm chip, two other possibilities are that the backdoor was a debugging tool or added in by a contractor that’s a security cutout. Both are very possible.
Being able to input your secret code and bypass that pesky mmu would help in low level debugging and if you were a spook wanting to get your shit in a chip it’s a lot easier to hire the person contracted to design the chunks of silicon that get licensed than to actually get an agreement going with the company that’s putting it all together.