add page cache with read-ahead and dirty writeback, file-backed and anonymous mmap with CoW, VAD-based virtual memory replacing the old user region model, PFN database with eviction and reclaim, file identity for cross-open section sharing, FAT32 path cache and per-file cluster chain cache, serial.sys for COM1 keyboard input, xHCI MSI with INTx and polled fallback, PciEnableMsiAuto, waitable input queue, KeWaitForAnyEvent, per-process thread info syscall, expanded kernel stats (PFN/PTE/VAD/file-cache/disk), pool allocation tags, async I/O user buffer locking, file flush on close, add docs.md.

code/user/syscall/syscall_stubs.asm

@@ -12,7 +12,8 @@
 ; User-mode callers follow standard MS x64: args 1-4 in RCX/RDX/R8/R9,
 ; args 5+ on the stack above the home area ([rsp+28h], [rsp+30h], ...).
 ;
-; SYSCALL_STUB2  - 4 or fewer args: pure register passing, no stack read.
+; SYSCALL_STUB2/3 - 4 or fewer args: pure register passing, no stack read.
+; SYSCALL_STUB5  - exactly 5 args: loads [rsp+28h] -> R10 only.
 ; SYSCALL_STUB6  - 5 or 6 args: loads [rsp+28h] -> R10 and [rsp+30h] -> R11.
 ;
 ; Handle lifecycle:
@@ -44,6 +45,27 @@ Sys&name PROC EXPORT
 Sys&name ENDP
 ENDM
 
+; ---------------------------------------------------------------------------
+SYSCALL_STUB3 MACRO name, nr
+PUBLIC Sys&name
+Sys&name PROC EXPORT
+    mov     rax, nr
+    int     40h
+    ret
+Sys&name ENDP
+ENDM
+
+; ---------------------------------------------------------------------------
+SYSCALL_STUB5 MACRO name, nr
+PUBLIC Sys&name
+Sys&name PROC EXPORT
+    mov     r10, [rsp+28h]      ; 5th argument
+    mov     rax, nr
+    int     40h
+    ret
+Sys&name ENDP
+ENDM
+
 ; ---------------------------------------------------------------------------
 SYSCALL_STUB6 MACRO name, nr
 PUBLIC Sys&name
@@ -62,14 +84,16 @@ ENDM
 SYSCALL_STUB2 ExitProcess,          SYS_EXIT_PROCESS
 SYSCALL_STUB2 ExitThread,           SYS_EXIT_THREAD
 SYSCALL_STUB2 CreateProcess,        SYS_CREATE_PROCESS
-SYSCALL_STUB2 WaitForProcess,       SYS_WAIT_FOR_PROCESS
+SYSCALL_STUB3 WaitSingle,           SYS_WAIT_SINGLE
+SYSCALL_STUB2 WaitMany,             SYS_WAIT_MANY
+SYSCALL_STUB2 OpenInputQueue,       SYS_OPEN_INPUT_QUEUE
 SYSCALL_STUB2 GetProcessExitCode,   SYS_GET_PROCESS_EXIT_CODE
 SYSCALL_STUB2 KillProcess,          SYS_KILL_PROCESS
 SYSCALL_STUB2 GetProcessList,       SYS_GET_PROCESS_LIST
 SYSCALL_STUB2 GetProcessPid,        SYS_GET_PROCESS_PID
+SYSCALL_STUB2 GetThreadList,       SYS_GET_THREAD_LIST
 
 SYSCALL_STUB2 CreateThread,         SYS_CREATE_THREAD
-SYSCALL_STUB2 WaitThread,           SYS_WAIT_THREAD
 SYSCALL_STUB2 GetCurrentTid,        SYS_GET_CURRENT_TID
 SYSCALL_STUB2 GetCurrentPid,        SYS_GET_CURRENT_PID
 SYSCALL_STUB2 SetThreadPriority,    SYS_SET_THREAD_PRIORITY
@@ -120,19 +144,16 @@ SYSCALL_STUB2 CloseHandle,          SYS_CLOSE_HANDLE
 ; Synchronization objects
 ; ---------------------------------------------------------------------------
 SYSCALL_STUB2 CreateMutex,          SYS_CREATE_MUTEX
-SYSCALL_STUB2 AcquireMutex,         SYS_ACQUIRE_MUTEX
 SYSCALL_STUB2 TryAcquireMutex,      SYS_TRY_ACQUIRE_MUTEX
 SYSCALL_STUB2 ReleaseMutex,         SYS_RELEASE_MUTEX
 
 SYSCALL_STUB2 CreateSem,            SYS_CREATE_SEM
-SYSCALL_STUB2 WaitSem,              SYS_WAIT_SEM
 SYSCALL_STUB2 TryWaitSem,           SYS_TRY_WAIT_SEM
 SYSCALL_STUB2 SignalSem,            SYS_SIGNAL_SEM
 
 SYSCALL_STUB2 CreateEvent,          SYS_CREATE_EVENT
 SYSCALL_STUB2 SignalEvent,          SYS_SIGNAL_EVENT
 SYSCALL_STUB2 ClearEvent,           SYS_CLEAR_EVENT
-SYSCALL_STUB2 WaitEvent,            SYS_WAIT_EVENT
 
 ; ---------------------------------------------------------------------------
 ; Queues and named queues
@@ -159,6 +180,7 @@ SYSCALL_STUB2 SeekFile,             SYS_SEEK_FILE
 SYSCALL_STUB2 GetFilePos,           SYS_GET_FILE_POS
 SYSCALL_STUB2 GetFileSize,          SYS_GET_FILE_SIZE
 SYSCALL_STUB2 TruncateFile,         SYS_TRUNCATE_FILE
+SYSCALL_STUB2 FlushFile,            SYS_FLUSH_FILE
 SYSCALL_STUB2 DeleteFile,           SYS_DELETE_FILE
 SYSCALL_STUB2 RenameFile,           SYS_RENAME_FILE
 
@@ -178,7 +200,10 @@ SYSCALL_STUB2 SetConsoleCursor,     SYS_SET_CONSOLE_CURSOR
 SYSCALL_STUB6 FillConsoleCharacter, SYS_FILL_CONSOLE_CHARACTER
 SYSCALL_STUB6 FillConsoleAttribute, SYS_FILL_CONSOLE_ATTRIBUTE
 SYSCALL_STUB6 PutScreenChar,        SYS_PUT_SCREEN_CHAR
-SYSCALL_STUB6 BlitScreen,           SYS_BLIT_SCREEN
+SYSCALL_STUB5 CreateSurface,        SYS_CREATE_SURFACE
+SYSCALL_STUB2 MapSurface,           SYS_MAP_SURFACE
+SYSCALL_STUB2 QuerySurface,         SYS_QUERY_SURFACE
+SYSCALL_STUB2 PresentSurface,       SYS_PRESENT_SURFACE
 SYSCALL_STUB2 ClearScreen,          SYS_CLEAR_SCREEN
 SYSCALL_STUB2 GetScreenSize,        SYS_GET_SCREEN_SIZE
 SYSCALL_STUB2 QueryDisplayInfo,     SYS_QUERY_DISPLAY_INFO
@@ -191,6 +216,8 @@ SYSCALL_STUB2 IsKeyDown,          SYS_IS_KEY_DOWN
 SYSCALL_STUB2 ReadKeyboardChar,           SYS_READ_KEYBOARD_CHAR
 SYSCALL_STUB2 ReadKey,            SYS_READ_KEY
 SYSCALL_STUB2 GetKeyModifiers,       SYS_GET_KEY_MODIFIERS
+SYSCALL_STUB2 ReadInputEvent,      SYS_READ_INPUT_EVENT
+SYSCALL_STUB2 PeekInputEvent,      SYS_PEEK_INPUT_EVENT
 
 SYSCALL_STUB2 PollMouse,            SYS_POLL_MOUSE
 SYSCALL_STUB2 ReadMouse,            SYS_READ_MOUSE
@@ -224,5 +251,7 @@ SYSCALL_STUB2 Poll,                 SYS_POLL
 SYSCALL_STUB2 GetMemoryStatus,       SYS_GET_MEMORY_STATUS
 SYSCALL_STUB2 QueryKernelStats,     SYS_QUERY_KERNEL_STATS
 SYSCALL_STUB2 GetSystemTime,        SYS_GET_SYSTEM_TIME
+SYSCALL_STUB5 CreateFileMapping,    SYS_CREATE_FILE_MAPPING
+SYSCALL_STUB6 MapFile,              SYS_MAP_FILE
 
 END