▲ 185 ▼ Undocumented backdoor found in Bluetooth chip used by a billion devices (www.bleepingcomputer.com) submitted 2 years ago* by neme@lemm.ee to c/cybersecurity@sh.itjust.works 30 comments fedilink hide all child comments
[–] olafurp@lemmy.world 4 points 2 years ago (1 child) Couldn't they just designate them as no-op codes? permalink fedilink source parent hideshow 2 child comments replies: [–] dave@feddit.uk 15 points 2 years ago Yes, but to do that they have to be decoded and handled. That's basically what the commenter above was saying. The original 6502 had many undocumented opcodes for this reason, and developers stated exploiting them for various reasons. The CMOS 65C02 redefined them to no-op. This has been going on a long time. permalink fedilink source parent
[–] dave@feddit.uk 15 points 2 years ago Yes, but to do that they have to be decoded and handled. That's basically what the commenter above was saying. The original 6502 had many undocumented opcodes for this reason, and developers stated exploiting them for various reasons. The CMOS 65C02 redefined them to no-op. This has been going on a long time. permalink fedilink source parent