1 Jun
2011
1 Jun
'11
8:19 a.m.
Hi,
On Tue May 31, 2011 at 16:31:26 -0700, Chen Tian wrote:
Where is the utcb's address of a thread is stored? If I implement a user level thread context switch (i.e., change the contents in registers EIP/ESP and general purpose registers), will a thread lose its utcb pointer?
No, the UTCB pointer is supplied by the kernel. When you change the stack pointer in your app the UTCB pointer will stay the same, ie l4_utcb() will return the same address.
Adam
--
Adam adam@os.inf.tu-dresden.de
Lackorzynski http://os.inf.tu-dresden.de/~adam/