I looked at "l4test" thread creation concept but i not understand it. I do not know how to determine the utcb location, if i can know where is the first utcb in a address space I can determine it, but I cannot find any way to figure out where the first utcb is. Also, after calling "L4_ThreadControl()" do I simply call set the MRs and call "L4_Ipc()"?