On Thursday, Mar 13, 2003, at 10:42 US/Pacific, Brian Bergstrand wrote: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Thursday, March 13, 2003, at 12:03 PM, Brian Daugherty wrote: PC = Program Counter. This is actually r2 (I think) since the PPC does not actually have a PC register. Whereever the PC may be, it's not r2, which is a general-purpose register, available for any use (ignoring the ABI, of course). The PC is not accessible, but it's there in some form, internally. DAR = Data register, this is usually r3, or the first arg to a function call. No, again, r3 is a general-purpose register. This one (DAR) is the Data Address Register (kernel-accessible) that contains the address that caused a Data Access fault. LR = Link Register which should be the previous function in the call stack. It contains the address to return to after a procedure call (bl, == 'branch and link'); or contains the target of one of the "branch-to-link-register" instructions. I forget what MSR and DSISR are. Machine State Register and Data Storage/Instruction Storage Register. Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large * Institute for General Semantics | If you're not confused, | You're not paying attention *--------------------------------------*-------------------------------* _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.