Add comments to the datastructure tracking the stack state, as the mapping between each stack slot and where its state is stored is not entirely obvious. Signed-off-by: Andrei Matei <andreimatei1@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/bpf/20231208032519.260451-2-andreimatei1@gmail.com