Function cpp_arch_vm_aspace_pick_spot 

pub unsafe extern "C" fn cpp_arch_vm_aspace_pick_spot(
    aspace: *mut ArchVmAspace,
    base: vaddr_t,
    end: vaddr_t,
    align: vaddr_t,
    size: usize,
    mmu_flags: arch_mmu_flags_t,
) -> vaddr_t