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kata-os-model: correct slot calculation for untyped memory handoff

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When calculating the landing spot for handing off the UntypedMemory
objects we need to take into account empty slots. Calculate the max
occupied slot # and add one. This works so long as empty slots have
not been allocated (by CAmkES) at the end of the CNode--which should
be safe since we control the MemoryManager CAmkES specification.

Change-Id: I5bfb75bd7134254c4475a91653d54e2aeb126721
GitOrigin-RevId: cf14850894ad21be97ea094f977c3420edf322ab
This commit is contained in:
Sam Leffler 2022-04-08 15:56:51 +00:00
parent 18c7660244
commit c0549c75e7
1 changed files with 5 additions and 1 deletions
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6
apps/system/components/kata-os-common/src/kata-os-model/mod.rs
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@ -934,7 +934,11 @@ impl<'a> KataOsModel<'a> {
let num_untypeds = self.bootinfo.untyped.end - self.bootinfo.untyped.start;
// NB: UntypedMemory caps are appended to the CAmkES-generated slots
let dest_start = self.spec.obj_slice()[cnode_obj_id].num_slots() + 1;
let dest_start = self.spec.obj_slice()[cnode_obj_id]
.slots_slice()
.iter()
.max_by_key(|slot| slot.slot)
.map_or(0, |slot| slot.slot + 1);
info!("Hand-off {} untypeds from {} to {}",
num_untypeds,