*I have a question about capability. 1. I know that CNode can consist of
hierarchy of CNodes like 1-level, 2-level, 3-level.Can I create new CNode
object like them? 2. If I can create hierarchy of CNode, I want to create
hierarchy of CNode in order to retype new object to new CNode object.I
tried it like below source code but it doesn't work with message "Untyped
Retype: Invalid destination address".Would you give some
advices?--------------------- source code // ** create CNode & mapping
seL4_CPtr new_CNode_cap = info->empty.start + 5; error =
untyped_retype_root(untyped, seL4_CapTableObject, seL4_SlotBits,
cspace_cap, new_CNode_cap); ZF_LOGF_IFERR(error, "Failed to retype our
chosen untyped into an CNode object.\n"); printf("==================
seL4_DebugCapIdentify ======================\n");
printf("seL4_DebugCapIdentify seL4_CPtr CNode_cap : %u \n",
seL4_DebugCapIdentify(new_CNode_cap)); // ** create new Endpoint object
and mapping to new CNode seL4_CPtr new_CNode_cap_Endpoint;
new_CNode_cap_Endpoint = info->empty.start + 6; error =
seL4_Untyped_Retype(untyped /* untyped cap */,
seL4_EndpointObject /* type */,
seL4_SlotBits /* size */,
new_CNode_cap /* root cnode cap */,
new_CNode_cap_Endpoint /* destination cspace */,
32 /* depth */,
new_CNode_cap_Endpoint /* offset */,
1 /* num objects */); if(error == 0)
printf("error : %d \n", error);3. Can I check CNode level? It means
like CNode level number.*
