configure.ps1: Fix path handling and improve reliability

- Use $PSScriptRoot for reliable source directory detection - Use Join-Path for proper path construction - Validate BUILD_TYPE against Debug/Release - Fix CMake argument quoting - Use Write-Error for error messages
2025-10-10 16:26:28 +02:00
19 changed files with 113 additions and 915 deletions
--- a/boot/bootsect/CMakeLists.txt
+++ b/boot/bootsect/CMakeLists.txt
@@ -1,8 +1,6 @@
 # XT Boot Sector
 PROJECT(BOOTSECT)

-add_definitions("-DARCH_ESP_SOURCE=\\\"${ARCH}/cpu.S\\\"")
-
 # Compile boot sectors
 compile_bootsector(mbrboot ${BOOTSECT_SOURCE_DIR}/mbrboot.S 0x7C00 Start)
 compile_bootsector(espboot ${BOOTSECT_SOURCE_DIR}/espboot.S 0x7C00 Start)
--- a/boot/bootsect/amd64/cpu.S
+++ b/boot/bootsect/amd64/cpu.S
@@ -1,144 +0,0 @@
-/**
- * PROJECT:         ExectOS
- * COPYRIGHT:       See COPYING.md in the top level directory
- * FILE:            boot/bootsect/amd64/cpu.S
- * DESCRIPTION:     Low-level support for CPU initialization
- * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
- */
-
-
-BuildPageMap:
-    /* Generate page map for first 1GB of memory */
-    pushaw
-    pushw %es
-    cld
-    movw $(0x1000 / 16), %ax
-    movw %ax, %es
-    xorw %di, %di
-    movl $(0x2000 | 0x07), %eax
-    stosl
-    xorl %eax, %eax
-    movw $1021, %cx
-    rep stosl
-    movw $(0x2000 / 16), %ax
-    movw %ax, %es
-    xorw %di, %di
-    movl $(0x3000 | 0x07), %eax
-    stosl
-    xorl %eax, %eax
-    movw $1021, %cx
-    rep stosl
-    movw $(0x3000 / 16), %ax
-    movw %ax, %es
-    xorw %di, %di
-    movw $512, %cx
-    movl $0x00000083, %eax
-.BuildPageMapLoop:
-    /* Identity map 512 pages of 2MB */
-    movl %eax, %es:(%di)
-    addl $2097152, %eax
-    addw $0x08, %di
-    loop .BuildPageMapLoop
-    popw %es
-    popaw
-    ret
-
-InitializeCpu:
-    /* Check if CPU supports CPUID, long mode and PAE */
-    pushal
-    pushfl
-    popl %eax
-    movl %eax, %ebx
-    xorl $0x00200000, %eax
-    pushl %eax
-    popfl
-    pushfl
-    popl %eax
-    cmpl %ebx, %eax
-    je CpuUnsupported
-    movl $0x01, %eax
-    cpuid
-    testl $0x40, %edx
-    jz CpuUnsupported
-    movl $0x80000000, %eax
-    cpuid
-    cmpl $0x80000000, %eax
-    jbe CpuUnsupported
-    movl $0x80000001, %eax
-    cpuid
-    testl $0x20000000, %edx
-    jz CpuUnsupported
-    popal
-    call LoadGdt
-    ret
-
-LoadGdt:
-    /* Load Global Descriptor Table */
-    lgdt .GdtPointer
-    ret
-
-RunStage2:
-    /* Switch to long mode and pass control to Stage 2 */
-    call BuildPageMap
-    call ParseExecutableHeader
-    xorl %edx, %edx
-    pushl %edx
-    pushl %eax
-    cli
-    xorw %ax, %ax
-    movw %ax, %ds
-    movw %ax, %es
-    movw %ax, %fs
-    movw %ax, %gs
-    movw %ax, %ss
-    movl %cr4, %eax
-    orl $0x00A0, %eax
-    movl %eax, %cr4
-    movl $0x00001000, %eax
-    movl %eax, %cr3
-    movl $0xC0000080, %ecx
-    rdmsr
-    orl $0x00000100, %eax
-    wrmsr
-    movl %cr0, %eax
-    orl $0x80000001, %eax
-    movl %eax, %cr0
-    ljmp $0x10, $.Stage2LongMode
-.code64
-.Stage2LongMode:
-    /* Set segments and stack, then jump to Stage 2 */
-    movw $0x18, %ax
-    movw %ax, %ds
-    movw %ax, %es
-    movw %ax, %ss
-    xorw %ax, %ax
-    movw %ax, %fs
-    movw %ax, %gs
-    popq %rax
-    xorq %rbx, %rbx
-    xorq %rcx, %rcx
-    xorq %rdx, %rdx
-    xorq %rsi, %rsi
-    xorq %rdi, %rdi
-    xorq %rbp, %rbp
-    jmp *%rax
-
-.code16
-.GdtDescriptor:
-    /* Global Descriptor Table */
-    .quad 0x0000000000000000
-    .quad 0x0000000000000000
-    .quad 0x00AF9A000000FFFF
-    .quad 0x00CF92000000FFFF
-    .quad 0x00009E000000FFFF
-    .quad 0x000092000000FFFF
-    .quad 0x00CF9B000000FFFF
-
-.GdtPointer:
-    /* Pointer to Global Descriptor Table */
-    .word .GdtPointer - .GdtDescriptor - 1
-    .long .GdtDescriptor
-
-.Stage2FileName:
-    /* Name of Stage 2 executable file */
-    .ascii "BOOTX64 EFI"
--- a/boot/bootsect/espboot.S
+++ b/boot/bootsect/espboot.S
@@ -121,15 +121,15 @@ VerifyBiosParameterBlock:
    ja FsError

 ReadExtraCode:
-    /* Read second VBR sector with extra boot code (3 sectors starting from sector 2) */
+    /* Read second VBR sector with extra boot code */
    movl HiddenSectors - Start(%bp), %eax
    addl $0x02, %eax
-    movw $0x03, %cx
+    movw $0x01, %cx
    xorw %bx, %bx
    movw %bx, %es
    movw $0x7E00, %bx
    call ReadSectors
-    jmp StartExtraCode
+    jmp StartSectors

 ReadSectors:
    /* Check for extended BIOS functions and use it only if available */
@@ -139,22 +139,18 @@ ReadSectors:
    movw $0x55AA, %bx
    movb DriveNumber - Start(%bp), %dl
    int $0x13
-    jc .ReadCHS
+    jc ReadCHS
    cmpw $0xAA55, %bx
-    jne .ReadCHS
+    jne ReadCHS
    testb $0x01, %cl
-    jz .ReadCHS
+    jz ReadCHS

    /* Verify drive size and determine whether to use CHS or LBA */
    cmpl %edi, %eax
-    jnb .ReadLBA
+    jnb ReadLBA

-.ReadCHS:
+ReadCHS:
    /* Read sectors using CHS */
-    popal
-
-.CHSLoop:
-    /* Read sector by sector using CHS */
    pushw %cx
    pushal
    xorl %edx, %edx
@@ -180,11 +176,11 @@ ReadSectors:
    movw %es, %dx
    addw $0x20, %dx
    movw %dx, %es
-    loop .CHSLoop
+    loop ReadCHS
    popw %es
    ret

-.ReadLBA:
+ReadLBA:
    /* Prepare DAP packet and read sectors using LBA */
    popal
    pushw %cx
@@ -213,19 +209,19 @@ ReadSectors:
    movw %dx, %es
    popw %bx
    subw %si, %cx
-    jnz .ReadLBA
+    jnz ReadLBA
    popw %es
    ret

 DiskError:
    /* Display disk error message and reboot */
-    movw $.MsgDiskError, %si
+    movw $msgDiskError, %si
    call Print
    jmp Reboot

 FsError:
    /* Display FS error message and reboot */
-    movw $.MsgFsError, %si
+    movw $msgFsError, %si
    call Print
    jmp Reboot

@@ -233,297 +229,48 @@ Print:
    /* Simple routine to print messages */
    lodsb
    orb     %al, %al
-    jz      .DonePrint
+    jz      DonePrint
    movb    $0x0E, %ah
    movw    $0x07, %bx
    int     $0x10
    jmp     Print
-.DonePrint:
+DonePrint:
    retw

 Reboot:
    /* Display a message, wait for a key press and reboot */
-    movw $.MsgAnyKey, %si
+    movw $msgAnyKey, %si
    call Print
    xorw %ax, %ax
    int $0x16
    int $0x19

-.MsgAnyKey:
-    .ascii "Press any key to restart...\r\n\0"
+msgAnyKey:
+    .ascii "Press any key to restart\r\n"

-.MsgDiskError:
-    .ascii "Disk error!\r\n\0"
+msgDiskError:
+    .ascii "Disk error\r\n"

-.MsgFsError:
-    .ascii "File system error!\r\n\0"
+msgFsError:
+    .ascii "File system error\r\n"

 /* Fill the rest of the VBR with zeros and add VBR signature at the end */
 .fill (510 - (. - Start)), 1, 0
 .word 0xAA55


-StartExtraCode:
-    /* Load XTLDR file from disk */
-    call LoadStage2
-
-    /* Enable A20 gate */
-    call EnableA20
-
-    /* Call architecture specific initialization code */
-    call InitializeCpu
-
-    /* Jump to Stage2 */
-    call RunStage2
-
-Clear8042:
-    /* Clear 8042 PS/2 buffer */
-    nop
-    nop
-    nop
-    nop
-    inb $0x64, %al
-    cmpb $0xff, %al
-    je .Clear8042_Done
-    testb $0x02, %al
-    jnz Clear8042
-.Clear8042_Done:
-    ret
-
-EnableA20:
-    /* Enable A20 gate */
-    pushaw
-    call Clear8042
-    movb $0xD1, %al
-    outb %al, $0x64
-    call Clear8042
-    movb $0xDF, %al
-    outb %al, $0x60
-    call Clear8042
-    movb $0xFF, %al
-    outb %al, $0x64
-    call Clear8042
-    popaw
-    ret
-
-FindFatEntry:
-    /* Find a file or directory in the FAT table */
-    pushw %bx
-    pushw %cx
-    pushw %dx
-    pushw %si
-    pushw %di
-.FindFatCluster:
-    /* Find FAT32 cluster holding the entry */
-    cmp $0x0FFFFFF8, %eax
-    jae .FindEntryFail
-    pushl %eax
-    movw $0x0200, %bx
-    movw %bx, %es
-    call ReadCluster
-    popl %eax
-    movb SectorsPerCluster - Start(%bp), %cl
-    shlw $0x04, %cx
-    xorw %di, %di
-.FindEntryLoop:
-    /* Find the entry */
-    movb %es:(%di), %al
-    cmpb $0x00, %al
-    je .FindEntryFail
-    cmpb $0xE5, %al
-    je .FindSkipEntry
-    movb %es:0x0B(%di), %ah
-    cmpb $0x0F, %ah
-    je .FindSkipEntry
-    pushw %di
-    pushw %si
-    pushw %cx
-    movw $0x0B, %cx
-    repe cmpsb
-    popw %cx
-    popw %si
-    popw %di
-    jnz .FindSkipEntry
-    movw %es:0x1A(%di), %ax
-    movw %es:0x14(%di), %dx
-    shll $0x10, %edx
-    orl %edx, %eax
-    clc
-    jmp .FindEntryDone
-.FindSkipEntry:
-    /* Skip to the next entry */
-    addw $0x20, %di
-    decw %cx
-    jnz .FindEntryLoop
-    call GetFatEntry
-    jmp .FindFatCluster
-.FindEntryFail:
-    /* Error, file/directory not found */
-    stc
-.FindEntryDone:
-    /* Clean up the stack */
-    popw %di
-    popw %si
-    popw %dx
-    popw %cx
-    popw %bx
-    ret
-
-GetFatEntry:
-    /* Get FAT32 sector and offset from FAT table */
-    shll $0x02, %eax
-    movl %eax, %ecx
-    xorl %edx, %edx
-    movzwl BytesPerSector - Start(%bp), %ebx
-    pushl %ebx
-    divl %ebx
-    movzwl ReservedSectors - Start(%bp), %ebx
-    addl %ebx, %eax
-    movl HiddenSectors - Start(%bp), %ebx
-    addl %ebx, %eax
-    popl %ebx
-    decl %ebx
-    andl %ebx, %ecx
-    movzwl ExtendedFlags - Start(%bp), %ebx
-    andw $0x0F, %bx
-    jz LoadFatSector
-    cmpb FatCopies - Start(%bp), %bl
-    jae FsError
-    pushl %eax
-    movl BigSectorsPerFat - Start(%bp), %eax
-    mull %ebx
-    popl %edx
-    addl %edx, %eax
-
-LoadFatSector:
-    /* Load FAT32 sector from disk */
-    pushl %ecx
-    movw $0x9000, %bx
-    movw %bx, %es
-    cmpl %esi, %eax
-    je .LoadFatSectorDone
-    movl %eax, %esi
-    xorw %bx, %bx
-    movw $0x01, %cx
-    call ReadSectors
-.LoadFatSectorDone:
-    /* Clean up the stack */
-    popl %ecx
-    movl %es:(%ecx), %eax
-    andl $0x0FFFFFFF, %eax
-    ret
-
-LoadStage2:
-    /* Load Stage2 executable, first find file in the path */
-    movl $0xFFFFFFFF, %esi
-    pushl %esi
-    movl 0x7C2C, %eax
-    movw $.EfiDirName, %si
-    call FindFatEntry
-    jc Stage2NotLoaded
-    movw $.BootDirName, %si
-    call FindFatEntry
-    jc Stage2NotLoaded
-    movw $.Stage2FileName, %si
-    call FindFatEntry
-    jc Stage2NotLoaded
-    popl %esi
-    /* Load XTLDR file from disk */
-    cmpl $0x02, %eax
-    jb FileNotFound
-    cmpl $0x0FFFFFF8, %eax
-    jae FileNotFound
-    movw $(0xF800 / 16), %bx
-    movw %bx, %es
-.LoadStage2Loop:
-    /* Load file data from disk */
-    pushl %eax
-    xorw %bx, %bx
-    pushw %es
-    call ReadCluster
-    popw %es
-    xorw %bx, %bx
-    movb SectorsPerCluster - Start(%bp), %bl
-    shlw $0x05, %bx
-    movw %es, %ax
-    addw %bx, %ax
-    movw %ax, %es
-    popl %eax
-    pushw %es
-    call GetFatEntry
-    popw %es
-    cmpl $0x0FFFFFF8, %eax
-    jb .LoadStage2Loop
-    ret
-
-ParseExecutableHeader:
-    /* Parse Stage2 PE/COFF executable header */
-    pushw %es
-    movw $(0xF800 / 16), %ax
-    movw %ax, %es
-    movl %es:60, %eax
-    addl $(4 + 20), %eax
-    movl %es:16(%eax), %eax
-    addl $0xF800, %eax
-    popw %es
-    ret
-
-ReadCluster:
-    /* Read FAT32 cluster from disk */
-    decl %eax
-    decl %eax
-    xorl %edx, %edx
-    movzbl SectorsPerCluster - Start(%bp), %ebx
-    mull %ebx
-    pushl %eax
-    xorl %edx, %edx
-    movzbl FatCopies - Start(%bp), %eax
-    mull BigSectorsPerFat - Start(%bp)
-    movzwl ReservedSectors - Start(%bp), %ebx
-    addl %ebx, %eax
-    addl HiddenSectors - Start(%bp), %eax
-    popl %ebx
-    addl %ebx, %eax
-    xorw %bx, %bx
-    movzbw SectorsPerCluster - Start(%bp), %cx
-    call ReadSectors
-    ret
-
-/* Include architecture specific code */
-.include ARCH_ESP_SOURCE
-
-CpuUnsupported:
-    /* Display CPU unsupported message and reboot */
-    popal
-    movw $.MsgCpuUnsupported, %si
+StartSectors:
+    /* Print message */
+    movw $msgUnavailable, %si
    call Print
-    jmp Reboot

-FileNotFound:
-    /* Display XTLDR not found message and reboot */
-    movw $.MsgXtLdrNotFound, %si
-    call Print
-    jmp Reboot
+    /* Wait for key press and reboot */
+    xorw %ax, %ax
+    int $0x16
+    int $0x19

-Stage2NotLoaded:
-    /* Clean up the stack and display XTLDR not found message and reboot */
-    popl %esi
-    jmp FileNotFound
+msgUnavailable:
+    .ascii "XTLDR requires EFI-based system!\r\nPress any key to restart\r\n"

-.BootDirName:
-    /* Boot directory name */
-    .ascii "BOOT       "
-
-.EfiDirName:
-    /* EFI directory name */
-    .ascii "EFI        "
-
-.MsgCpuUnsupported:
-    .ascii "CPU not supported!\r\n\0"
-
-.MsgXtLdrNotFound:
-    .ascii "XTLDR Stage2 not found!\r\n\0"
-
-/* Fill the rest of the extra VBR with zeros and add signature */
-.fill (2043 - (. - Start)), 1, 0
-.ascii "XTLDR"
+/* Fill the rest of the extra VBR with zeros */
+.fill (1024 - (. - Start)), 1, 0
--- a/boot/bootsect/i686/cpu.S
+++ b/boot/bootsect/i686/cpu.S
@@ -1,124 +0,0 @@
-/**
- * PROJECT:         ExectOS
- * COPYRIGHT:       See COPYING.md in the top level directory
- * FILE:            boot/bootsect/i686/cpu.S
- * DESCRIPTION:     Low-level support for CPU initialization
- * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
- */
-
-
-BuildPageMap:
-    /* Generate page map for first 16MB of memory */
-    pushaw
-    pushw %es
-    cld
-    movw $(0x1000 >> 0x04), %ax
-    movw %ax, %es
-    xorw %di, %di
-    movl $(0x2000 | 0x03), %eax
-    stosl
-    movl $(0x3000 | 0x03), %eax
-    stosl
-    movl $(0x4000 | 0x03), %eax
-    stosl
-    movl $(0x5000 | 0x03), %eax
-    stosl
-    xorl %eax, %eax
-    movw $(1024 - 4), %cx
-    rep stosl
-    movl $0x00000003, %eax
-    movl $4, %edx
-    movw $(0x2000 >> 0x04), %bx
-.BuildPageMapLoop:
-    /* Identity map 1024 pages of 4KB */
-    movw %bx, %es
-    xorw %di, %di
-    pushl %edx
-    movw $1024, %cx
-.FillPageMapTable:
-    /* Fill the page table */
-    movl %eax, %es:(%di)
-    addl $4096, %eax
-    addw $0x04, %di
-    loop .FillPageMapTable
-    popl %edx
-    addw $(0x1000 >> 0x04), %bx
-    decl %edx
-    jnz .BuildPageMapLoop
-    popw %es
-    popaw
-    ret
-
-InitializeCpu:
-    /* Check if CPU supports CPUID */
-    pushal
-    pushfl
-    popl %eax
-    movl %eax, %ebx
-    xorl $0x00200000, %eax
-    pushl %eax
-    popfl
-    pushfl
-    popl %eax
-    cmpl %ebx, %eax
-    je CpuUnsupported
-    popal
-    call LoadGdt
-    ret
-
-LoadGdt:
-    /* Load Global Descriptor Table */
-    lgdt .GdtPointer
-    ret
-
-RunStage2:
-    /* Switch to protected mode and pass control to Stage 2 */
-    call BuildPageMap
-    call ParseExecutableHeader
-    pushl %eax
-    cli
-    movl %cr0, %eax
-    orl $0x01, %eax
-    movl %eax, %cr0
-    ljmp $0x08, $.Stage2ProtectedMode
-.code32
-.Stage2ProtectedMode:
-    /* Set segments and stack, then jump to Stage 2 */
-    movw $0x10, %ax
-    movw %ax, %ds
-    movw %ax, %es
-    movw %ax, %ss
-    xorw %ax, %ax
-    movw %ax, %fs
-    movw %ax, %gs
-    popl %eax
-    xorl %ebx, %ebx
-    xorl %ecx, %ecx
-    xorl %edx, %edx
-    xorl %esi, %esi
-    xorl %edi, %edi
-    xorl %ebp, %ebp
-    movl $0x1000, %ebx
-    movl %ebx, %cr3
-    movl %cr0, %ebx
-    orl $0x80000000, %ebx
-    movl %ebx, %cr0
-    jmp *%eax
-
-.code16
-.GdtDescriptor:
-    /* Global Descriptor Table */
-    .quad 0x0000000000000000
-    .quad 0x00CF9A000000FFFF
-    .quad 0x00CF92000000FFFF
-    .quad 0x00009E000000FFFF
-    .quad 0x000092000000FFFF
-
-.GdtPointer:
-    /* Pointer to Global Descriptor Table */
-    .word .GdtPointer - .GdtDescriptor - 1
-    .long .GdtDescriptor
-
-.Stage2FileName:
-    /* Name of Stage 2 executable file */
-    .ascii "BOOTIA32EFI"
--- a/boot/bootsect/mbrboot.S
+++ b/boot/bootsect/mbrboot.S
@@ -4,7 +4,6 @@
 * FILE:            boot/bootsect/amd64/mbrboot.S
 * DESCRIPTION:     XT Boot Loader MBR boot code
 * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
- *                  Aiken Harris <aiken@codingworkshop.eu.org>
 */

 .text
@@ -42,7 +41,7 @@ RealStart:
    movw %ax, %ss

    /* Print welcome message */
-    leaw .MsgXtosBoot, %si
+    leaw msgXtosBoot, %si
    call Print

    /* Get BIOS boot drive and partition table offset */
@@ -91,19 +90,19 @@ PartitionFound:

 InvalidSignature:
    /* Invalid signature error */
-    leaw .MsgInvalidSignature, %si
+    leaw msgInvalidSignature, %si
    call Print
    jmp HaltSystem

 PartitionNotFound:
    /* Active partition not found error */
-    leaw .MsgPartitionNotFound, %si
+    leaw msgPartitionNotFound, %si
    call Print
    jmp HaltSystem

 VbrReadFail:
    /* VBR read failed error */
-    leaw .MsgVbrReadFail, %si
+    leaw msgVbrReadFail, %si
    call Print
    jmp HaltSystem

@@ -137,16 +136,16 @@ DonePrint:
    /* Storage for the LBA start */
    .long 0

-.MsgInvalidSignature:
+msgInvalidSignature:
    .asciz "Invalid partition signature!"

-.MsgPartitionNotFound:
+msgPartitionNotFound:
    .asciz "Bootable partition not found!"

-.MsgVbrReadFail:
+msgVbrReadFail:
    .asciz "VBR read failed!"

-.MsgXtosBoot:
+msgXtosBoot:
    .asciz "Starting XTOS boot loader...\r\n"

 /* Fill the rest of the MBR with zeros and add MBR signature at the end */
--- a/boot/xtldr/CMakeLists.txt
+++ b/boot/xtldr/CMakeLists.txt
@@ -16,7 +16,6 @@ list(APPEND LIBXTLDR_SOURCE
 # Specify list of source code files
 list(APPEND XTLDR_SOURCE
    ${XTLDR_SOURCE_DIR}/arch/${ARCH}/memory.cc
-    ${XTLDR_SOURCE_DIR}/biosutil.cc
    ${XTLDR_SOURCE_DIR}/bootutil.cc
    ${XTLDR_SOURCE_DIR}/config.cc
    ${XTLDR_SOURCE_DIR}/console.cc
@@ -39,9 +38,6 @@ add_executable(xtldr ${XTLDR_SOURCE})
 # Add linker libraries
 target_link_libraries(xtldr libxtos)

-# Add linker options
-target_link_options(xtldr PRIVATE /ALIGN:512)
-
 # Set proper binary name and install target
 if(ARCH STREQUAL "i686")
 	set(BINARY_NAME "bootia32")
@@ -53,6 +49,5 @@ set_install_target(xtldr efi/boot)

 # Set loader entrypoint and subsystem
 set_entrypoint(xtldr "BlStartXtLoader")
-set_imagebase(xtldr ${BASEADDRESS_XTLDR})
 set_linker_map(xtldr TRUE)
 set_subsystem(xtldr efi_application)
--- a/boot/xtldr/biosutil.cc
+++ b/boot/xtldr/biosutil.cc
@@ -1,190 +0,0 @@
-/**
- * PROJECT:         ExectOS
- * COPYRIGHT:       See COPYING.md in the top level directory
- * FILE:            xtldr/biosutil.cc
- * DESCRIPTION:     Legacy BIOS support
- * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
- */
-
-#include <xtldr.hh>
-
-
-/**
- * Clears the entire screen and moves the cursor to the top-left corner.
- *
- * @return This routine does not return any value.
- *
- * @since XT 1.0
- */
-XTCDECL
-VOID
-BiosUtils::ClearScreen()
-{
-    VOLATILE PUSHORT VgaBuffer = (PUSHORT)0xB8000;
-    USHORT Blank;
-    UINT Index;
-
-    /* Set blank character */
-    Blank = (0x0F << 8) | L' ';
-
-    /* Fill the entire screen with blank characters */
-    for(Index = 0; Index < VgaWidth * VgaHeight; Index++)
-    {
-        VgaBuffer[Index] = Blank;
-    }
-
-    /* Reset cursor position to the top-left corner */
-    CursorX = 0;
-    CursorY = 0;
-
-    /* Update the hardware cursor position */
-    UpdateCursor();
-}
-
-/**
- * Formats the input string and prints it out to the screen.
- *
- * @param Format
- *        The formatted string that is to be written to the output.
- *
- * @param ...
- *        Depending on the format string, this routine might expect a sequence of additional arguments.
- *
- * @return This routine does not return any value.
- *
- * @since XT 1.0
- */
-XTCDECL
-VOID
-BiosUtils::Print(IN PCWSTR Format,
-                 IN ...)
-{
-    RTL_PRINT_CONTEXT PrintContext;
-    VA_LIST Arguments;
-
-    /* Initialise the print contexts */
-    PrintContext.WriteWideCharacter = PutChar;
-
-    /* Initialise the va_list */
-    VA_START(Arguments, Format);
-
-    /* Format and print the string to the stdout */
-    RTL::WideString::FormatWideString(&PrintContext, (PWCHAR)Format, Arguments);
-
-    /* Clean up the va_list */
-    VA_END(Arguments);
-}
-
-/**
- * Writes a single wide character to the screen using legacy BIOS VGA text mode.
- *
- * @param Character
- *        The wide character to be printed.
- *
- * @return This routine returns a status code.
- *
- * @since XT 1.0
- */
-XTCDECL
-XTSTATUS
-BiosUtils::PutChar(IN WCHAR Character)
-{
-    VOLATILE PUSHORT VgaBuffer = (PUSHORT)0xB8000;
-    USHORT VgaCharacter;
-
-    /* Handle special characters */
-    if(Character == L'\n')
-    {
-        /* Move to the next line */
-        CursorX = 0;
-        CursorY++;
-    }
-    else if(Character == L'\r')
-    {
-        /* Move to the beginning of the current line */
-        CursorX = 0;
-    }
-    else
-    {
-        /* Print character and move cursor to the right */
-        VgaCharacter = (0x0F << 8) | (Character & 0xFF);
-        VgaBuffer[CursorY * VgaWidth + CursorX] = VgaCharacter;
-        CursorX++;
-    }
-
-    /* Handle moving to the next line if cursor is at the end of the line */
-    if(CursorX >= VgaWidth)
-    {
-        CursorX = 0;
-        CursorY++;
-    }
-
-    /* Handle scrolling if cursor is at the end of the screen */
-    if(CursorY >= VgaHeight)
-    {
-        ScrollScreen();
-        CursorY = VgaHeight - 1;
-    }
-
-    /* Update the hardware cursor position */
-    UpdateCursor();
-
-    /* Return success */
-    return STATUS_EFI_SUCCESS;
-}
-
-/**
- * Scrolls the entire screen content up by one line and clears the last line.
- *
- * @return This routine does not return any value.
- *
- * @since XT 1.0
- */
-XTCDECL
-VOID
-BiosUtils::ScrollScreen()
-{
-    VOLATILE PUSHORT VgaBuffer = (PUSHORT)0xB8000;
-    USHORT Blank;
-    UINT Index;
-
-    /* Set blank character */
-    Blank = (0x0F << 8) | L' ';
-
-    /* Move every line up by one */
-    for(Index = 0; Index < (VgaHeight - 1) * VgaWidth; Index++)
-    {
-        VgaBuffer[Index] = VgaBuffer[Index + VgaWidth];
-    }
-
-    /* Clear the last line */
-    for(Index = (VgaHeight - 1) * VgaWidth; Index < VgaHeight * VgaWidth; Index++)
-    {
-        VgaBuffer[Index] = Blank;
-    }
-}
-
-/**
- * Updates the hardware cursor position on the screen.
- *
- * @return This routine does not return any value.
- *
- * @since XT 1.0
- */
-XTCDECL
-VOID
-BiosUtils::UpdateCursor()
-{
-    USHORT Position;
-
-    /* Calculate cursor position */
-    Position = CursorY * VgaWidth + CursorX;
-
-    /* Send command to set the high byte of the cursor position */
-    HL::IoPort::WritePort8(0x3D4, 0x0E);
-    HL::IoPort::WritePort8(0x3D5, (UCHAR)((Position >> 8) & 0xFF));
-
-    /* Send command to set the low byte of the cursor position */
-    HL::IoPort::WritePort8(0x3D4, 0x0F);
-    HL::IoPort::WritePort8(0x3D5, (UCHAR)(Position & 0xFF));
-}
--- a/boot/xtldr/data.cc
+++ b/boot/xtldr/data.cc
@@ -10,18 +10,6 @@
 #include <xtldr.hh>


-/* Legacy BIOS cursor X position */
-USHORT BiosUtils::CursorX = 0;
-
-/* Legacy BIOS cursor Y position */
-USHORT BiosUtils::CursorY = 0;
-
-/* Legacy BIOS screen height */
-CONST USHORT BiosUtils::VgaHeight = 25;
-
-/* Legacy BIOS screen width */
-CONST USHORT BiosUtils::VgaWidth = 80;
-
 /* XT Boot Loader menu list */
 PLIST_ENTRY Configuration::BootMenuList = NULLPTR;

--- a/boot/xtldr/includes/xtldr.hh
+++ b/boot/xtldr/includes/xtldr.hh
@@ -15,25 +15,6 @@
 #include <libxtos.hh>


-class BiosUtils
-{
-    private:
-        STATIC USHORT CursorX;
-        STATIC USHORT CursorY;
-        STATIC CONST USHORT VgaHeight;
-        STATIC CONST USHORT VgaWidth;
-
-    public:
-        STATIC XTCDECL VOID ClearScreen();
-        STATIC XTCDECL VOID Print(IN PCWSTR Format,
-                                  IN ...);
-        STATIC XTCDECL XTSTATUS PutChar(IN WCHAR Character);
-
-    private:
-        STATIC XTCDECL VOID ScrollScreen();
-        STATIC XTCDECL VOID UpdateCursor();
-};
-
 class BootUtils
 {
    public:
--- a/boot/xtldr/xtldr.cc
+++ b/boot/xtldr/xtldr.cc
@@ -236,15 +236,6 @@ BlStartXtLoader(IN EFI_HANDLE ImageHandle,
    PWCHAR Modules;
    EFI_STATUS Status;

-    /* Check if system is EFI-based and provided parameters are valid */
-    if(ImageHandle == NULLPTR || SystemTable == NULLPTR)
-    {
-        /* Invalid parameters, print error message using BIOS calls and hang */
-        BiosUtils::ClearScreen();
-        BiosUtils::Print(L"XTLDR requires EFI-based system!");
-        for(;;);
-    }
-
    /* Initialize XTLDR and */
    XtLoader::InitializeBootLoader(ImageHandle, SystemTable);

--- a/sdk/cmake/baseaddress/amd64.cmake
+++ b/sdk/cmake/baseaddress/amd64.cmake
@@ -1,3 +1,2 @@
 # Set base addresses for all modules
-set(BASEADDRESS_XTLDR    0x000000000000F800)
 set(BASEADDRESS_XTOSKRNL 0x0000000140000000)
--- a/sdk/cmake/baseaddress/i686.cmake
+++ b/sdk/cmake/baseaddress/i686.cmake
@@ -1,3 +1,2 @@
 # Set base addresses for all modules
-set(BASEADDRESS_XTLDR    0x0000F800)
 set(BASEADDRESS_XTOSKRNL 0x00400000)
--- a/sdk/cmake/functions.cmake
+++ b/sdk/cmake/functions.cmake
@@ -64,17 +64,11 @@ function(compile_bootsector NAME SOURCE BASEADDR ENTRYPOINT)
    set(BINARY_NAME "${NAME}.bin")
    set(OBJECT_NAME "${NAME}.obj")

-    get_directory_property(DEFS COMPILE_DEFINITIONS)
-    foreach(def ${DEFS})
-        list(APPEND ASM_DEFS "-D${def}")
-    endforeach()
-
    add_custom_command(
        OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${BINARY_NAME}
        COMMAND ${CMAKE_ASM_COMPILER}
            /nologo
            --target=i386-none-elf
-            ${ASM_DEFS}
            -I${CMAKE_CURRENT_SOURCE_DIR}
            /Fo${CMAKE_CURRENT_BINARY_DIR}/${OBJECT_NAME}
            -c -- ${SOURCE}
--- a/sdk/xtdk/amd64/ketypes.h
+++ b/sdk/xtdk/amd64/ketypes.h
@@ -272,18 +272,11 @@ typedef struct _KIDTENTRY
 {
    USHORT OffsetLow;
    USHORT Selector;
-    union
-    {
-        struct
-        {
-            USHORT IstIndex:3;
-            USHORT Reserved0:5;
-            USHORT Type:5;
-            USHORT Dpl:2;
-            USHORT Present:1;
-        };
-        USHORT Access;
-    };
+    USHORT IstIndex:3;
+    USHORT Reserved0:5;
+    USHORT Type:5;
+    USHORT Dpl:2;
+    USHORT Present:1;
    USHORT OffsetMiddle;
    ULONG OffsetHigh;
    ULONG Reserved1;
--- a/sdk/xtdk/i686/ketypes.h
+++ b/sdk/xtdk/i686/ketypes.h
@@ -58,6 +58,12 @@
 #define KIDT_ACCESS_RING0                 0x00
 #define KIDT_ACCESS_RING3                 0x60

+/* IDT gate types */
+#define KIDT_TASK                         0x05
+#define KIDT_CALL                         0x0C
+#define KIDT_INTERRUPT                    0x0E
+#define KIDT_TRAP                         0x0F
+
 /* TSS Offsets */
 #define KTSS_ESP0                         0x04
 #define KTSS_CR3                          0x1C
@@ -278,18 +284,7 @@ typedef struct _KIDTENTRY
 {
    USHORT Offset;
    USHORT Selector;
-    union
-    {
-        struct
-        {
-            UCHAR Reserved;
-            UCHAR Type:4;
-            UCHAR Flag:1;
-            UCHAR Dpl:2;
-            UCHAR Present:1;
-        };
-        USHORT Access;
-    };
+    USHORT Access;
    USHORT ExtendedOffset;
 } KIDTENTRY, *PKIDTENTRY;

--- a/xtoskrnl/ar/amd64/procsup.cc
+++ b/xtoskrnl/ar/amd64/procsup.cc
@@ -249,34 +249,34 @@ AR::ProcSup::InitializeIdt(IN PKPROCESSOR_BLOCK ProcessorBlock)
    for(Vector = 0; Vector < IDT_ENTRIES; Vector++)
    {
        /* Set the IDT to handle unexpected interrupts */
-        SetIdtGate(ProcessorBlock->IdtBase, Vector, (PVOID)ArTrap0xFF, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_INTERRUPT_GATE);
+        SetIdtGate(ProcessorBlock->IdtBase, Vector, (PVOID)ArTrap0xFF, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
    }

    /* Setup IDT handlers for known interrupts and traps */
-    SetIdtGate(ProcessorBlock->IdtBase, 0x00, (PVOID)ArTrap0x00, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x01, (PVOID)ArTrap0x01, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x02, (PVOID)ArTrap0x02, KGDT_R0_CODE, KIDT_IST_PANIC, KIDT_ACCESS_RING0, AMD64_INTERRUPT_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x03, (PVOID)ArTrap0x03, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x04, (PVOID)ArTrap0x04, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x05, (PVOID)ArTrap0x05, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x06, (PVOID)ArTrap0x06, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x07, (PVOID)ArTrap0x07, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x08, (PVOID)ArTrap0x08, KGDT_R0_CODE, KIDT_IST_PANIC, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x09, (PVOID)ArTrap0x09, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0A, (PVOID)ArTrap0x0A, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0B, (PVOID)ArTrap0x0B, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0C, (PVOID)ArTrap0x0C, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0D, (PVOID)ArTrap0x0D, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0E, (PVOID)ArTrap0x0E, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x10, (PVOID)ArTrap0x10, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x11, (PVOID)ArTrap0x11, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x12, (PVOID)ArTrap0x12, KGDT_R0_CODE, KIDT_IST_MCA, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x13, (PVOID)ArTrap0x13, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x1F, (PVOID)ArTrap0x1F, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_INTERRUPT_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2C, (PVOID)ArTrap0x2C, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2D, (PVOID)ArTrap0x2D, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3, AMD64_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2F, (PVOID)ArTrap0x2F, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_INTERRUPT_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0xE1, (PVOID)ArTrap0xE1, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0, AMD64_INTERRUPT_GATE);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x00, (PVOID)ArTrap0x00, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x01, (PVOID)ArTrap0x01, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x02, (PVOID)ArTrap0x02, KGDT_R0_CODE, KIDT_IST_PANIC, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x03, (PVOID)ArTrap0x03, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x04, (PVOID)ArTrap0x04, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x05, (PVOID)ArTrap0x05, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x06, (PVOID)ArTrap0x06, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x07, (PVOID)ArTrap0x07, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x08, (PVOID)ArTrap0x08, KGDT_R0_CODE, KIDT_IST_PANIC, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x09, (PVOID)ArTrap0x09, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0A, (PVOID)ArTrap0x0A, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0B, (PVOID)ArTrap0x0B, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0C, (PVOID)ArTrap0x0C, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0D, (PVOID)ArTrap0x0D, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0E, (PVOID)ArTrap0x0E, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x10, (PVOID)ArTrap0x10, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x11, (PVOID)ArTrap0x11, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x12, (PVOID)ArTrap0x12, KGDT_R0_CODE, KIDT_IST_MCA, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x13, (PVOID)ArTrap0x13, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x1F, (PVOID)ArTrap0x1F, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2C, (PVOID)ArTrap0x2C, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2D, (PVOID)ArTrap0x2D, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2F, (PVOID)ArTrap0x2F, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0xE1, (PVOID)ArTrap0xE1, KGDT_R0_CODE, KIDT_IST_RESERVED, KIDT_ACCESS_RING0);
 }

 /**
@@ -636,9 +636,6 @@ AR::ProcSup::SetGdtEntryBase(IN PKGDTENTRY Gdt,
 * @param Access
 *        Supplies the gate access rights.
 *
- * @param Type
- *        Supplies the gate type.
- *
 * @return This routine does not return any value.
 *
 * @since XT 1.0
@@ -650,22 +647,15 @@ AR::ProcSup::SetIdtGate(IN PKIDTENTRY Idt,
                        IN PVOID Handler,
                        IN USHORT Selector,
                        IN USHORT Ist,
-                        IN USHORT Dpl,
-                        IN USHORT Type)
+                        IN USHORT Access)
 {
-    /* Set the handler's address */
+    /* Setup the gate */
    Idt[Vector].OffsetLow = ((ULONG_PTR)Handler & 0xFFFF);
    Idt[Vector].OffsetMiddle = (((ULONG_PTR)Handler >> 16) & 0xFFFF);
    Idt[Vector].OffsetHigh = (ULONG_PTR)Handler >> 32;
-
-    /* Set the code segment selector */
-    Idt[Vector].Selector = Selector;
-
-    /* Initialize the gate's attributes and flags */
-    Idt[Vector].Access = 0;
-    Idt[Vector].Dpl = Dpl;
+    Idt[Vector].Dpl = Access;
    Idt[Vector].IstIndex = Ist;
    Idt[Vector].Present = 1;
-    Idt[Vector].Reserved1 = 0;
-    Idt[Vector].Type = Type;
+    Idt[Vector].Selector = Selector;
+    Idt[Vector].Type = 0xE;
 }
--- a/xtoskrnl/ar/i686/procsup.cc
+++ b/xtoskrnl/ar/i686/procsup.cc
@@ -242,34 +242,34 @@ AR::ProcSup::InitializeIdt(IN PKPROCESSOR_BLOCK ProcessorBlock)
    for(Vector = 0; Vector < IDT_ENTRIES; Vector++)
    {
        /* Set the IDT to handle unexpected interrupts */
-        SetIdtGate(ProcessorBlock->IdtBase, Vector, (PVOID)ArTrap0xFF, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_INTERRUPT_GATE);
+        SetIdtGate(ProcessorBlock->IdtBase, Vector, (PVOID)ArTrap0xFF, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
    }

    /* Setup IDT handlers for known interrupts and traps */
-    SetIdtGate(ProcessorBlock->IdtBase, 0x00, (PVOID)ArTrap0x00, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x01, (PVOID)ArTrap0x01, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x02, (PVOID)ArTrap0x02, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_INTERRUPT_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x03, (PVOID)ArTrap0x03, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x04, (PVOID)ArTrap0x04, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x05, (PVOID)ArTrap0x05, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x06, (PVOID)ArTrap0x06, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x07, (PVOID)ArTrap0x07, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x08, (PVOID)ArTrap0x08, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x09, (PVOID)ArTrap0x09, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0A, (PVOID)ArTrap0x0A, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0B, (PVOID)ArTrap0x0B, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0C, (PVOID)ArTrap0x0C, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0D, (PVOID)ArTrap0x0D, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x0E, (PVOID)ArTrap0x0E, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x10, (PVOID)ArTrap0x10, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x11, (PVOID)ArTrap0x11, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x12, (PVOID)ArTrap0x12, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x13, (PVOID)ArTrap0x13, KGDT_R0_CODE, 0, KIDT_ACCESS_RING0, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2A, (PVOID)ArTrap0x2A, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2B, (PVOID)ArTrap0x2B, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2C, (PVOID)ArTrap0x2C, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2D, (PVOID)ArTrap0x2D, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
-    SetIdtGate(ProcessorBlock->IdtBase, 0x2E, (PVOID)ArTrap0x2E, KGDT_R0_CODE, 0, KIDT_ACCESS_RING3, I686_TRAP_GATE);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x00, (PVOID)ArTrap0x00, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x01, (PVOID)ArTrap0x01, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x02, (PVOID)ArTrap0x02, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x03, (PVOID)ArTrap0x03, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x04, (PVOID)ArTrap0x04, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x05, (PVOID)ArTrap0x05, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x06, (PVOID)ArTrap0x06, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x07, (PVOID)ArTrap0x07, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x08, (PVOID)ArTrap0x08, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x09, (PVOID)ArTrap0x09, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0A, (PVOID)ArTrap0x0A, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0B, (PVOID)ArTrap0x0B, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0C, (PVOID)ArTrap0x0C, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0D, (PVOID)ArTrap0x0D, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x0E, (PVOID)ArTrap0x0E, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x10, (PVOID)ArTrap0x10, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x11, (PVOID)ArTrap0x11, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x12, (PVOID)ArTrap0x12, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x13, (PVOID)ArTrap0x13, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING0);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2A, (PVOID)ArTrap0x2A, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2B, (PVOID)ArTrap0x2B, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2C, (PVOID)ArTrap0x2C, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2D, (PVOID)ArTrap0x2D, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
+    SetIdtGate(ProcessorBlock->IdtBase, 0x2E, (PVOID)ArTrap0x2E, KGDT_R0_CODE, 0, KIDT_INTERRUPT | KIDT_ACCESS_RING3);
 }

 /**
@@ -656,9 +656,6 @@ AR::ProcSup::SetGdtEntryBase(IN PKGDTENTRY Gdt,
 * @param Access
 *        Supplies the gate access rights.
 *
- * @param Type
- *        Supplies the gate type.
- *
 * @return This routine does not return any value.
 *
 * @since XT 1.0
@@ -670,21 +667,13 @@ AR::ProcSup::SetIdtGate(IN PKIDTENTRY Idt,
                        IN PVOID Handler,
                        IN USHORT Selector,
                        IN USHORT Ist,
-                        IN USHORT Dpl,
-                        IN USHORT Type)
+                        IN USHORT Access)
 {
-    /* Set the handler's address */
+    /* Setup the gate */
    Idt[Vector].Offset = (USHORT)((ULONG)Handler & 0xFFFF);
    Idt[Vector].ExtendedOffset = (USHORT)((ULONG)Handler >> 16);
-
-    /* Set the code segment selector */
+    Idt[Vector].Access = 0x8000 | (Access << 8);
    Idt[Vector].Selector = Selector;
-
-    /* Initialize the gate's attributes and flags */
-    Idt[Vector].Access = 0;
-    Idt[Vector].Dpl = Dpl;
-    Idt[Vector].Present = 1;
-    Idt[Vector].Type = Type;
 }

 /**
--- a/xtoskrnl/includes/ar/amd64/procsup.hh
+++ b/xtoskrnl/includes/ar/amd64/procsup.hh
@@ -67,8 +67,7 @@ namespace AR
                                         IN PVOID Handler,
                                         IN USHORT Selector,
                                         IN USHORT Ist,
-                                         IN USHORT Dpl,
-                                         IN USHORT Type);
+                                         IN USHORT Access);
    };
 }

--- a/xtoskrnl/includes/ar/i686/procsup.hh
+++ b/xtoskrnl/includes/ar/i686/procsup.hh
@@ -72,8 +72,7 @@ namespace AR
                                         IN PVOID Handler,
                                         IN USHORT Selector,
                                         IN USHORT Ist,
-                                         IN USHORT Dpl,
-                                         IN USHORT Type);
+                                         IN USHORT Access);
            STATIC XTAPI VOID SetNonMaskableInterruptTssEntry(IN PKPROCESSOR_BLOCK ProcessorBlock,
                                                              IN PVOID KernelFaultStack);