Module test_abi 

Javm-private test fn_ids (band >= 0x100). Always compiled — host-visible. Javm-private FN_ID constants for the test guest binary.

Band policy: the nub substrate owns fn_id space [0, 0x100) (production ids in nub-arch-x86-abi, generic probes in nub_arch_x86::test_abi); each personality owns [0x100, ...). These ids are exposed only by the javm-guest-x86-tests binary; host-side test drivers import them via this lib.

Constants

FN_ID_TEST_INVOKE_TWO_SERIAL

Javm scheduler probe: runs two top-level invokes through one in-guest KernelScheduler (call_loop::run_two_for_test). Payload is two raw InvokePackets concatenated; output is rkyv-encoded [InvocationResult; 2].