when kernel mode?

jockyw2001 · Post by **jockyw2001** » Sat Apr 29, 2006 1:15 am

I'd like to know under what conditions an app shall run in kernel mode. I know that it should when it uses the ME. What other conditions are there?

dot_blank · Post by **dot_blank** » Sat Apr 29, 2006 1:40 am

when loading user made prxs
either if prxs are user module or kernel module

groepaz · Post by **groepaz** » Sat Apr 29, 2006 11:15 pm

kernel mode is generally needed to

- run code in the KU segments (PC=0x8........)
- access memory in the KU segments (first 8mb of ram)
- access i/o area (hardware registers)
- access hardware vectors (ram at bcf00000)

other restrictions, such as certain prx modules beeing only loaded in kernel mode, are handled by the kernel/OS so in theory they can be patched away (simelar to the no-device-check patch).