From 46fb4920325c492c3d2c4f913a2fb6b05266fb6a Mon Sep 17 00:00:00 2001
From: Aiken Harris <harraiken91@gmail.com>
Date: Fri, 3 Jul 2026 16:52:59 +0200
Subject: [PATCH] Define core LPC types and structures

---
 sdk/xtdk/iotypes.h  |  7 +++++
 sdk/xtdk/lpctypes.h | 64 +++++++++++++++++++++++++++++++++++++++++++++
 sdk/xtdk/xtkmapi.h  |  1 +
 sdk/xtdk/xtstruct.h |  4 +++
 4 files changed, 76 insertions(+)
 create mode 100644 sdk/xtdk/lpctypes.h

diff --git a/sdk/xtdk/iotypes.h b/sdk/xtdk/iotypes.h
index 071edb2..b8c3a7e 100644
--- a/sdk/xtdk/iotypes.h
+++ b/sdk/xtdk/iotypes.h
@@ -62,6 +62,13 @@
 /* C/C++ specific code */
 #ifndef __XTOS_ASSEMBLER__
 
+/* Client ID structure */
+typedef struct _CLIENT_ID
+{
+    HANDLE UniqueProcess;
+    HANDLE UniqueThread;
+} CLIENT_ID, *PCLIENT_ID;
+
 /* PCI bridge control registers */
 typedef struct _PCI_BRIDGE_CONTROL_REGISTER
 {
diff --git a/sdk/xtdk/lpctypes.h b/sdk/xtdk/lpctypes.h
new file mode 100644
index 0000000..736f1a2
--- /dev/null
+++ b/sdk/xtdk/lpctypes.h
@@ -0,0 +1,64 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            sdk/xtdk/lpctypes.h
+ * DESCRIPTION:     Local Procedure Call (LPC) structures and definitions
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#ifndef __XTDK_LPCTYPES_H
+#define __XTDK_LPCTYPES_H
+
+#include <xttypes.h>
+#include <xtstruct.h>
+#include <iotypes.h>
+#include <ketypes.h>
+#include <setypes.h>
+
+
+/* C/C++ specific code */
+#ifndef __XTOS_ASSEMBLER__
+
+/* LPC non-paged port queue structure definition */
+typedef struct _LPCP_NONPAGED_PORT_QUEUE
+{
+    KSEMAPHORE Semaphore;
+    struct _LPCP_PORT_OBJECT *BackPointer;
+} LPCP_NONPAGED_PORT_QUEUE, *PLPCP_NONPAGED_PORT_QUEUE;
+
+/* LPC port queue structure definition */
+typedef struct _LPCP_PORT_QUEUE
+{
+    PLPCP_NONPAGED_PORT_QUEUE NonPagedPortQueue;
+    PKSEMAPHORE Semaphore;
+    LIST_ENTRY ReceiveHead;
+} LPCP_PORT_QUEUE, *PLPCP_PORT_QUEUE;
+
+/* LPC port object structure definition */
+typedef struct _LPCP_PORT_OBJECT
+{
+    struct _LPCP_PORT_OBJECT *ConnectionPort;
+    struct _LPCP_PORT_OBJECT *ConnectedPort;
+    LPCP_PORT_QUEUE MsgQueue;
+    CLIENT_ID Creator;
+    PVOID ClientSectionBase;
+    PVOID ServerSectionBase;
+    PVOID PortContext;
+    PETHREAD ClientThread;
+    SECURITY_QUALITY_OF_SERVICE SecurityQos;
+    SECURITY_CLIENT_CONTEXT StaticSecurity;
+    LIST_ENTRY LpcReplyChainHead;
+    LIST_ENTRY LpcDataInfoChainHead;
+    union
+    {
+        PEPROCESS ServerProcess;
+        PEPROCESS MappingProcess;
+    };
+    ULONG MaxMessageLength;
+    ULONG MaxConnectionInfoLength;
+    ULONG Flags;
+    KEVENT WaitEvent;
+} LPCP_PORT_OBJECT, *PLPCP_PORT_OBJECT;
+
+#endif /* __XTOS_ASSEMBLER__ */
+#endif /* __XTDK_LPCTYPES_H */
diff --git a/sdk/xtdk/xtkmapi.h b/sdk/xtdk/xtkmapi.h
index 2505bdb..576c00e 100644
--- a/sdk/xtdk/xtkmapi.h
+++ b/sdk/xtdk/xtkmapi.h
@@ -34,6 +34,7 @@
 #include <kdtypes.h>
 #include <ketypes.h>
 #include <ldrtypes.h>
+#include <lpctypes.h>
 #include <mmtypes.h>
 #include <potypes.h>
 #include <pstypes.h>
diff --git a/sdk/xtdk/xtstruct.h b/sdk/xtdk/xtstruct.h
index 9570176..68b6416 100644
--- a/sdk/xtdk/xtstruct.h
+++ b/sdk/xtdk/xtstruct.h
@@ -87,6 +87,7 @@ typedef struct _ACPI_XSDT ACPI_XSDT, *PACPI_XSDT;
 typedef struct _ANSI_STRING ANSI_STRING, *PANSI_STRING;
 typedef struct _ANSI_STRING32 ANSI_STRING32, *PANSI_STRING32;
 typedef struct _ANSI_STRING64 ANSI_STRING64, *PANSI_STRING64;
+typedef struct _CLIENT_ID CLIENT_ID, *PCLIENT_ID;
 typedef struct _CPPORT CPPORT, *PCPPORT;
 typedef struct _CPTABLE_INFO CPTABLE_INFO, *PCPTABLE_INFO;
 typedef const struct _CMMPAGEMAP_ROUTINES CMMPAGEMAP_ROUTINES, *PCMMPAGEMAP_ROUTINES;
@@ -301,6 +302,9 @@ typedef struct _LOADER_INFORMATION_BLOCK LOADER_INFORMATION_BLOCK, *PLOADER_INFO
 typedef struct _LOADER_MEMORY_DESCRIPTOR LOADER_MEMORY_DESCRIPTOR, *PLOADER_MEMORY_DESCRIPTOR;
 typedef struct _LOOKASIDE_LIST LOOKASIDE_LIST, *PLOOKASIDE_LIST;
 typedef struct _LOOKASIDE_LIST_EX LOOKASIDE_LIST_EX, *PLOOKASIDE_LIST_EX;
+typedef struct _LPCP_NONPAGED_PORT_QUEUE LPCP_NONPAGED_PORT_QUEUE, *PLPCP_NONPAGED_PORT_QUEUE;
+typedef struct _LPCP_PORT_OBJECT LPCP_PORT_OBJECT, *PLPCP_PORT_OBJECT;
+typedef struct _LPCP_PORT_QUEUE LPCP_PORT_QUEUE, *PLPCP_PORT_QUEUE;
 typedef struct _LUID LUID, *PLUID;
 typedef struct _LUID_AND_ATTRIBUTES LUID_AND_ATTRIBUTES, *PLUID_AND_ATTRIBUTES;
 typedef struct _M128 M128, *PM128;