move POSIX spawn, exec and child tracking into posixsrv, keep process transactions alive across reconnects and preserve stable PIDs across image replacement, flesh out spawn with ordered file actions, process-group selection and signal inheritance, implement execve with bootstrap validation and rollback before retiring the old process, add vfork children that share the native process while keeping separate POSIX descriptor and signal state, replace local spawn bookkeeping with child reaping, nonblocking and process-group waits and orphan cleanup, add signal dispositions, per-thread masks, pending delivery, process/group signalling and alarms, translate native exceptions into POSIX signals and inherit masks when creating threads, make pipe waits interruptible and raise SIGPIPE for broken pipes, pass arguments and environment into main and add getenv/environ, add direct user APC notifications that can run without an alertable wait, add current-thread capabilities and resume-and-wait, let accepted IPC endpoints open restricted peer process capabilities and preserve caller security during spawn and exec, make process preparation reusable and improve DLL lookup across current, executable and fallback directories, move keyboard repeat into RSSRV so PS/2 and USB share one repeat policy, fix video presentation, report launch failure stages and status codes, mooaaar tests.

code/user/syscall/syscall_stubs.asm

@@ -53,9 +53,12 @@ SYSCALL_STUB KillProcess,          SYS_KILL_PROCESS
 SYSCALL_STUB GetProcessList,       SYS_GET_PROCESS_LIST
 SYSCALL_STUB GetProcessPid,        SYS_GET_PROCESS_PID
 SYSCALL_STUB GetThreadList,        SYS_GET_THREAD_LIST
+SYSCALL_STUB GetThreadTid,         SYS_GET_THREAD_TID
 
 SYSCALL_STUB CreateThread,         SYS_CREATE_THREAD
+SYSCALL_STUB OpenCurrentThread,    SYS_OPEN_CURRENT_THREAD
 SYSCALL_STUB ResumeThread,         SYS_RESUME_THREAD
+SYSCALL_STUB ResumeThreadAndWait,  SYS_RESUME_THREAD_AND_WAIT
 SYSCALL_STUB GetCurrentTid,        SYS_GET_CURRENT_TID
 SYSCALL_STUB GetCurrentPid,        SYS_GET_CURRENT_PID
 SYSCALL_STUB SetThreadPriority,    SYS_SET_THREAD_PRIORITY
@@ -64,6 +67,7 @@ SYSCALL_STUB QueryThreadName,      SYS_QUERY_THREAD_NAME
 SYSCALL_STUB Yield,                SYS_YIELD
 SYSCALL_STUB Sleep,                SYS_SLEEP
 SYSCALL_STUB SetUserApcDispatcher, SYS_SET_USER_APC_DISPATCHER
+SYSCALL_STUB QueueUserApc,         SYS_QUEUE_USER_APC
 SYSCALL_STUB ApcReturn,            SYS_APC_RETURN
 SYSCALL_STUB SetExceptionDispatcher, SYS_SET_EXCEPTION_DISPATCHER
 SYSCALL_STUB GetExceptionDispatcher, SYS_GET_EXCEPTION_DISPATCHER
@@ -116,6 +120,7 @@ SYSCALL_STUB DeriveHandle,         SYS_DERIVE_HANDLE
 SYSCALL_STUB RevokeHandle,         SYS_REVOKE_HANDLE
 SYSCALL_STUB DeriveSecurityContext, SYS_DERIVE_SECURITY_CONTEXT
 SYSCALL_STUB QuerySecurityContext,  SYS_QUERY_SECURITY_CONTEXT
+SYSCALL_STUB OpenProcessSecurityContext, SYS_OPEN_PROCESS_SECURITY_CONTEXT
 
 ; ---------------------------------------------------------------------------
 ; Synchronization objects
@@ -155,6 +160,7 @@ SYSCALL_STUB ReceivePort,           SYS_RECEIVE_PORT
 SYSCALL_STUB CallPort,              SYS_CALL_PORT
 SYSCALL_STUB ReplyPort,             SYS_REPLY_PORT
 SYSCALL_STUB DisconnectPort,        SYS_DISCONNECT_PORT
+SYSCALL_STUB OpenPortPeerProcess,     SYS_OPEN_PORT_PEER_PROCESS
 SYSCALL_STUB RegisterSystemService, SYS_REGISTER_SYSTEM_SERVICE
 SYSCALL_STUB UnregisterSystemService, SYS_UNREGISTER_SYSTEM_SERVICE
 SYSCALL_STUB ConnectSystemService,  SYS_CONNECT_SYSTEM_SERVICE