// K1330 native EL0 owned-message copy across sender exit. use super::*; use turkos_kernel::runtime::handles::{CloseResult, Error, Handle, OwnedChannel, Rights}; use turkos_kernel::runtime::process_table::{Outcome, ProcessId}; use turkos_kernel::runtime::syscall_abi as abi; static mut OS_K1330_CHANNEL: OwnedChannel = OwnedChannel::new(94); static mut OS_K1330_STAGE: u8 = 0; static mut OS_K1330_CHILD_PID: Option = None; const SHELL: u64 = (1u64 << 32) | 1; const CHILD: u64 = (1u64 << 32) | 2; fn channel() -> &'static mut OwnedChannel { // Mode 57 runs on one CPU with IRQs masked and no concurrent queue user. unsafe { &mut *core::ptr::addr_of_mut!(OS_K1330_CHANNEL) } } fn stage() -> u8 { unsafe { read_volatile(core::ptr::addr_of!(OS_K1330_STAGE)) } } fn set_stage(value: u8) { unsafe { write_volatile(core::ptr::addr_of_mut!(OS_K1330_STAGE), value); } } fn child_pid() -> ProcessId { unsafe { read_volatile(core::ptr::addr_of!(OS_K1330_CHILD_PID)) } .unwrap_or_else(|| park()) } pub(super) fn begin() { unsafe { core::ptr::write(core::ptr::addr_of_mut!(OS_K1330_CHANNEL), OwnedChannel::new(94)); write_volatile(core::ptr::addr_of_mut!(OS_K1330_CHILD_PID), None); } set_stage(0); } pub(super) fn finish() -> Result<(), &'static str> { let snapshot = channel().snapshot(); if stage() != 10 || snapshot.queue.len != 0 || snapshot.queue.head != 0 || snapshot.queue.slots != [None; 2] || snapshot.senders != [None; 2] || snapshot.queue.objects.entries != [None; 2] || snapshot.queue.objects.resources != [None; 2] || snapshot.queue.objects.watchers != [None; 2] || snapshot.queue.objects.generations != [1, 1] || snapshot.queue.objects.next_wait != 1 { return Err("owned-message owner leak"); } Ok(()) } pub(super) fn dispatch( episode: &mut OsK1215AEl0Episode, frame: &mut os_k920_exception::Frame, process_table: &mut OsK1105Table<'_>, ) -> u64 { if frame.elr < episode.launch.user_pc || frame.elr >= episode.launch.user_pc + 4096 || !frame.elr.is_multiple_of(4) { park(); } if frame.x[7] == 3 { let expected_calls = if episode.case == 0 && stage() >= 6 { 2 } else { 1 }; if episode.calls != expected_calls || process_table.record(episode.pid).is_err() { park(); } let owner = episode.pid; match frame.x[8] { 36 => { if episode.case != 1 || stage() != 2 || frame.x[0] != CHILD || frame.x[2] != 4 { park(); } channel().send_from(owner, Handle::from_raw(CHILD), 4, |buffer| process_table.copy_current_user_data( owner, frame.x[1], buffer).map_err(|_| Error::Fault)) .unwrap_or_else(|_| park()); let message = channel().peek(owner, Handle::from_raw(CHILD)) .unwrap_or_else(|_| park()).unwrap_or_else(|| park()); if message.sender != owner || message.payload.as_slice() != b"ABCD" || channel().len() != 1 { park(); } frame.x[0] = 0; set_stage(3); write_line("TURKOS/OS/K1330O-TRACE: CHILD-SENT-KERNEL-OWNED-COPY"); 0 } 39 => { if episode.case != 1 || stage() != 3 || frame.x[0] != CHILD || frame.x[2] != 4 { park(); } let before = channel().snapshot(); let mut source = [0u8; 4]; process_table.copy_current_user_data(owner, frame.x[1], &mut source) .unwrap_or_else(|_| park()); if &source != b"ZZZZ" || channel().snapshot() != before { park(); } let message = channel().peek(owner, Handle::from_raw(CHILD)) .unwrap_or_else(|_| park()).unwrap_or_else(|| park()); if message.sender != owner || message.payload.as_slice() != b"ABCD" { park(); } frame.x[0] = 0; set_stage(4); write_line("TURKOS/OS/K1330O-TRACE: SOURCE-MUTATED-COPY-UNCHANGED"); 0 } 37 => { let (handle, expected, next) = match (episode.case, stage()) { (1, 4) => (CHILD, CloseResult::Remaining(1), 5), (0, 8) => (SHELL, CloseResult::LastClosed, 9), _ => park(), }; if frame.x[0] != handle || channel().close(owner, Handle::from_raw(handle)) != Ok(expected) { park(); } frame.x[0] = if expected == CloseResult::LastClosed { 1 } else { 0 }; set_stage(next); if episode.case == 1 { write_line("TURKOS/OS/K1330O-TRACE: SENDER-HANDLE-CLOSED-MESSAGE-HELD"); } else { write_line("TURKOS/OS/K1330O-TRACE: LAST-CLOSE-CLEARED-PAYLOAD-AND-SENDER"); } 0 } 38 => { if episode.case != 0 || stage() != 6 || frame.x[0] != SHELL || frame.x[2] != 4 { park(); } let sender = child_pid(); let handle = Handle::from_raw(SHELL); let message = channel().peek(owner, handle) .unwrap_or_else(|_| park()).unwrap_or_else(|| park()); if message.sender != sender || message.payload.as_slice() != b"ABCD" { park(); } process_table.write_current_user_data(owner, frame.x[1], message.payload.as_slice()).unwrap_or_else(|_| park()); if channel().receive(owner, handle) != Ok(Some(message)) || channel().len() != 0 { park(); } frame.x[0] = 4; set_stage(7); write_line("TURKOS/OS/K1330O-TRACE: SHELL-RECEIVED-CHILD-COPY-AFTER-EXIT"); 0 } _ => { frame.x[0] = abi::AbiResult::Err(abi::Errno::NoSys).encode(); 0 } } } else if frame.x[7] == 2 && frame.x[8] == 3 { let request = turkos_os_user_runtime_abi::decode( frame.x[7], frame.x[8], core::array::from_fn(|i| frame.x[i])) .unwrap_or_else(|_| park()); let turkos_os_user_runtime_abi::Request::Exit(code) = request else { park(); }; if episode.case == 0 { if code != 0 || episode.calls != 2 || stage() != 9 { park(); } } else if code != 42 || episode.calls != 1 || stage() != 5 || channel().snapshot().senders[0] != Some(episode.pid) { park(); } process_table.exit_current(code).unwrap_or_else(|_| park()); let outcome = Outcome::Exited(code); if process_table.record(episode.pid).map(|r| r.outcome) != Ok(Some(outcome)) { park(); } if episode.case == 1 { set_stage(6); write_line("TURKOS/OS/K1330O-TRACE: CHILD-EXIT-QUEUED-COPY-PERSISTS"); } else { set_stage(10); } episode.outcome = Some(outcome); 1 } else { if frame.x[7] != abi::ABI_VERSION { park(); } let mut abi_frame = turkos_os_exceptions::exceptions::Frame::EMPTY; abi_frame.x = frame.x; let call = abi::decode_call(&abi_frame).unwrap_or_else(|_| park()); if call == abi::Call::Role { if episode.calls != 0 { park(); } if episode.case == 0 { if stage() != 0 { park(); } let handle = channel().open_kernel(episode.pid) .unwrap_or_else(|_| park()); if handle.raw() != SHELL { park(); } set_stage(1); write_line("TURKOS/OS/K1330O-TRACE: SHELL-OWNS-CHANNEL"); } else { if stage() != 1 { park(); } let parent = process_table.record(episode.pid) .unwrap_or_else(|_| park()).parent.unwrap_or_else(|| park()); if unsafe { read_volatile(core::ptr::addr_of!(OS_K1215A_INIT_PID)) } != Some(parent) { park(); } let handle = channel().grant_kernel(parent, episode.pid, Handle::from_raw(SHELL), Rights::READ_WRITE) .unwrap_or_else(|_| park()); if handle.raw() != CHILD { park(); } unsafe { write_volatile(core::ptr::addr_of_mut!(OS_K1330_CHILD_PID), Some(episode.pid)); } set_stage(2); write_line("TURKOS/OS/K1330O-TRACE: CHILD-OWNS-SEND-REFERENCE"); } episode.calls = 1; frame.x[0] = episode.case as u64; return 0; } if let abi::Call::RunChild(1) = call { if episode.case != 0 || episode.calls != 1 || stage() != 1 { park(); } return os_k1215a_run_child(episode as *mut _, frame as *mut _, episode.launch.kernel_root); } if let abi::Call::Write(request) = call { if episode.case != 0 || request.fd() != 1 || request.bytes() != 16 || stage() != 7 { park(); } let mut bytes = [0u8; 16]; process_table.copy_current_user_data(episode.pid, request.address(), &mut bytes).unwrap_or_else(|_| park()); if &bytes != b"OWNED:ABCD:P20!\n" { park(); } for byte in bytes { write_byte(byte); } frame.x[0] = 16; set_stage(8); write_line("TURKOS/OS/K1330O-TRACE: USER-WROTE-OWNED-RESULT"); return 0; } park() } }