23 Feb
2006
23 Feb
'06
11:35 p.m.
On Thu Feb 23, 2006 at 17:33:43 -0500, Jonathan S. Shapiro wrote:
On Fri, 2006-02-24 at 09:18 +1100, Benno wrote:
When a process is preempted, where are its registers stored? Are the stored in the UTCB, or are they stored in some data structure that is only accessible to the kernel?
They are stored in the thread's TCB, which is kernel private data.
So, in particular, the saved registers are not accessable to normal load and store instructions that might occur on a second processor. Correct?
Correct. (Of course there could be the potential to do some neat things if they *were* available, but that raises a whole can of worms, and unfortunately I don't have time to go over that design discussion again ;)
Cheers,
Benno