From e37e5b97af598abb13deef1a767955628922e8a7 Mon Sep 17 00:00:00 2001
From: belliash <belliash@codingworkshop.eu.org>
Date: Sat, 12 Nov 2022 23:17:44 +0100
Subject: [PATCH] Initial version of the kernel initialization block, needed to
 start the kernel

---
 sdk/xtdk/xtfw.h        | 54 ++++++++++++++++++++++++++++++++++++++++++
 sdk/xtdk/xtstruct.h    |  5 ++++
 xtoskrnl/ke/krnlinit.c |  2 +-
 3 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/sdk/xtdk/xtfw.h b/sdk/xtdk/xtfw.h
index 0f2fa7c..532eedb 100644
--- a/sdk/xtdk/xtfw.h
+++ b/sdk/xtdk/xtfw.h
@@ -10,8 +10,12 @@
 #define __XTDK_XTFW_H
 
 #include "xttypes.h"
+#include "xtcommon.h"
 
 
+/* Version number of the current kernel initialization block */
+#define INITIALIZATION_BLOCK_VERSION                            1
+
 /* Memory allocation structures */
 typedef enum _LOADER_MEMORY_TYPE
 {
@@ -45,4 +49,54 @@ typedef enum _LOADER_MEMORY_TYPE
     LoaderMaximum
 } LOADER_MEMORY_TYPE, *PLOADER_MEMORY_TYPE;
 
+/* Firmware types enumeration list */
+typedef enum _SYSTEM_FIRMWARE_TYPE {
+    SystemFirmwareInvalid,
+    SystemFirmwareUnknown,
+    SystemFirmwareEfi,
+    SystemFirmwarePcat
+} SYSTEM_FIRMWARE_TYPE, *PSYSTEM_FIRMWARE_TYPE;
+
+/* PCAT Firmware information block */
+typedef struct _PCAT_FIRMWARE_INFORMATION
+{
+    ULONG PlaceHolder;
+} PCAT_FIRMWARE_INFORMATION, *PPCAT_FIRMWARE_INFORMATION;
+
+/* UEFI Firmware information block */
+typedef struct _UEFI_FIRMWARE_INFORMATION
+{
+    ULONG EfiVersion;
+    ULONGLONG EfiImageHandle;
+    ULONGLONG EfiSystemTable;
+    PVOID EfiRuntimeServices;
+} UEFI_FIRMWARE_INFORMATION, *PUEFI_FIRMWARE_INFORMATION;
+
+/* Firmware information block */
+typedef struct _FIRMWARE_INFORMATION_BLOCK
+{
+    SYSTEM_FIRMWARE_TYPE FirmwareType;
+    union
+    {
+        UEFI_FIRMWARE_INFORMATION EfiFirmware;
+        PCAT_FIRMWARE_INFORMATION PcatFirmware;
+    };
+} FIRMWARE_INFORMATION_BLOCK, *PFIRMWARE_INFORMATION_BLOCK;
+
+/* Boot Loader information block */
+typedef struct _LOADER_INFORMATION_BLOCK
+{
+    PVOID DbgPrint;
+} LOADER_INFORMATION_BLOCK, *PLOADER_INFORMATION_BLOCK;
+
+/* Loader provided information needed by the kernel to initialize */
+typedef struct _KERNEL_INITIALIZATION_BLOCK
+{
+    ULONG Size;
+    ULONG Version;
+    ULONG_PTR KernelStack;
+    LOADER_INFORMATION_BLOCK LoaderInformation;
+    FIRMWARE_INFORMATION_BLOCK FirmwareInformation;
+} KERNEL_INITIALIZATION_BLOCK, *PKERNEL_INITIALIZATION_BLOCK;
+
 #endif /* __XTDK_XTFW_H */
diff --git a/sdk/xtdk/xtstruct.h b/sdk/xtdk/xtstruct.h
index c230a57..3099456 100644
--- a/sdk/xtdk/xtstruct.h
+++ b/sdk/xtdk/xtstruct.h
@@ -142,10 +142,14 @@ typedef struct _EFI_USB_DEVICE_PATH EFI_USB_DEVICE_PATH, *PEFI_USB_DEVICE_PATH;
 typedef struct _EFI_USB_WWID_DEVICE_PATH EFI_USB_WWID_DEVICE_PATH, *PEFI_USB_WWID_DEVICE_PATH;
 typedef struct _EFI_VENDOR_DEVICE_PATH EFI_VENDOR_DEVICE_PATH, *PEFI_VENDOR_DEVICE_PATH;
 typedef struct _EFI_VLAN_DEVICE_PATH EFI_VLAN_DEVICE_PATH, *PEFI_VLAN_DEVICE_PATH;
+typedef struct _FIRMWARE_INFORMATION_BLOCK FIRMWARE_INFORMATION_BLOCK, *PFIRMWARE_INFORMATION_BLOCK;
 typedef struct _GUID GUID, *PGUID;
+typedef struct _KERNEL_INITIALIZATION_BLOCK KERNEL_INITIALIZATION_BLOCK, *PKERNEL_INITIALIZATION_BLOCK;
 typedef struct _LIST_ENTRY LIST_ENTRY, *PLIST_ENTRY;
 typedef struct _LIST_ENTRY32 LIST_ENTRY32, *PLIST_ENTRY32;
 typedef struct _LIST_ENTRY64 LIST_ENTRY64, *PLIST_ENTRY64;
+typedef struct _LOADER_INFORMATION_BLOCK LOADER_INFORMATION_BLOCK, *PLOADER_INFORMATION_BLOCK;
+typedef struct _PCAT_FIRMWARE_INFORMATION PCAT_FIRMWARE_INFORMATION, *PPCAT_FIRMWARE_INFORMATION;
 typedef struct _PECOFF_IMAGE_BASE_RELOCATION PECOFF_IMAGE_BASE_RELOCATION, *PPECOFF_IMAGE_BASE_RELOCATION;
 typedef struct _PECOFF_IMAGE_DATA PECOFF_IMAGE_DATA, *PPECOFF_IMAGE_DATA;
 typedef struct _PECOFF_IMAGE_DATA_DIRECTORY PECOFF_IMAGE_DATA_DIRECTORY, *PPECOFF_IMAGE_DATA_DIRECTORY;
@@ -166,6 +170,7 @@ typedef struct _PECOFF_IMAGE_ROM_HEADER PECOFF_IMAGE_ROM_HEADER, *PPECOFF_IMAGE_
 typedef struct _PECOFF_IMAGE_ROM_OPTIONAL_HEADER PECOFF_IMAGE_ROM_OPTIONAL_HEADER, *PPECOFF_IMAGE_ROM_OPTIONAL_HEADER;
 typedef struct _PECOFF_IMAGE_SECTION_HEADER PECOFF_IMAGE_SECTION_HEADER, *PPECOFF_IMAGE_SECTION_HEADER;
 typedef struct _PECOFF_IMAGE_VXD_HEADER PECOFF_IMAGE_VXD_HEADER, *PPECOFF_IMAGE_VXD_HEADER;
+typedef struct _UEFI_FIRMWARE_INFORMATION UEFI_FIRMWARE_INFORMATION, *PUEFI_FIRMWARE_INFORMATION;
 
 /* Unions forward references */
 typedef union _EFI_DEV_PATH EFI_DEV_PATH, *PEFI_DEV_PATH;
diff --git a/xtoskrnl/ke/krnlinit.c b/xtoskrnl/ke/krnlinit.c
index 77ca3cd..63a3571 100644
--- a/xtoskrnl/ke/krnlinit.c
+++ b/xtoskrnl/ke/krnlinit.c
@@ -18,7 +18,7 @@
  */
 XTAPI
 VOID
-KeStartXtSystem()
+KeStartXtSystem(IN PKERNEL_INITIALIZATION_BLOCK LoaderBlock)
 {
     /* Enter infinite kernel thread loop */
     for(;;);