Update LLVM to 17.0.4

.build.yml

@@ -1,14 +0,0 @@
-pipeline:
-  build:
-    image: codingworkshop/oscw-runner:latest
-    commands:
-      - CORES=10 ./build-linux.sh
-  publish:
-    image: codingworkshop/oscw-runner:latest
-    secrets:
-      - OSCW_GITHUB_USERNAME
-      - OSCW_GITHUB_PASSWORD
-    when:
-      event: tag
-    commands:
-      - github_publish $OSCW_GITHUB_USERNAME $OSCW_GITHUB_PASSWORD $(ls xtchain-*-linux.tar.zst)

.github/workflows/build.yml

@@ -0,0 +1,20 @@
+name: Builds
+run-name: ${{ github.actor }} runs Gitea Actions
+on: [push]
+
+jobs:
+  XTChain:
+    runs-on: oscw
+    container:
+      image: codingworkshop/oscw-runner:latest
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v3
+      - name: Build XTChain
+        run: CORES=10 ./build-linux.sh
+      - name: Publish binaries
+        if: startsWith(github.ref, 'refs/tags/')
+        env:
+          OSCW_GITHUB_USERNAME: ${{ secrets.OSCW_GITHUB_USERNAME }}
+          OSCW_GITHUB_PASSWORD: ${{ secrets.OSCW_GITHUB_PASSWORD }}
+        run: github_publish $OSCW_GITHUB_USERNAME $OSCW_GITHUB_PASSWORD $(ls xtchain-*-linux.tar.zst)

README.md

@@ -2,8 +2,8 @@
   <a href="https://git.codingworkshop.eu.org/xt-sys/xtchain">
     <img alt="GIT Repository" src="https://img.shields.io/badge/Source-GIT-purple">
   </a>
-  <a href="https://ci.codingworkshop.eu.org/xt-sys/xtchain">
-    <img alt="Build Status" src="https://ci.codingworkshop.eu.org/api/badges/xt-sys/xtchain/status.svg">
+  <a href="https://git.codingworkshop.eu.org/xt-sys/xtchain/actions">
+    <img alt="Build Status" src="https://codingworkshop.eu.org/actions.php?project=xt-sys/xtchain">
   </a>
   <a href="https://git.codingworkshop.eu.org/xt-sys/xtchain/src/branch/master/COPYING.md">
     <img alt="License" src="https://img.shields.io/badge/License-GPLv3-blue.svg">

build-linux.sh

@@ -18,22 +18,22 @@ GENERIC="generic-w64-mingw32"
 
 # Binutils Settings
 BINUTILSDIR="${SRCDIR}/binutils"
-BINUTILSTAG="binutils-2_40"
+BINUTILSTAG="binutils-2_41"
 BINUTILSVCS="git://sourceware.org/git/binutils-gdb.git"
 
 # CMake Settings
 CMAKEDIR="${SRCDIR}/cmake"
-CMAKETAG="v3.24.2"
+CMAKETAG="v3.27.6"
 CMAKEVCS="https://gitlab.kitware.com/cmake/cmake.git"
 
 # LLVM Settings
 LLVMDIR="${SRCDIR}/llvm"
-LLVMTAG="llvmorg-16.0.0"
+LLVMTAG="llvmorg-17.0.4"
 LLVMVCS="https://github.com/llvm/llvm-project.git"
 
 # Make Settings
 MAKEDIR="${SRCDIR}/make"
-MAKETAG="4.3"
+MAKETAG="4.4.1"
 MAKEVCS="git://git.savannah.gnu.org/make"
 
 # Mingw-w64 Settings
@@ -43,19 +43,14 @@ MINGWTAG="master"
 MINGWNTV="0x601"
 MINGWVCS="https://github.com/mirror/mingw-w64.git"
 
-# NASM Settings
-NASMDIR="${SRCDIR}/nasm"
-NASMTAG="nasm-2.15.05"
-NASMVCS="https://github.com/netwide-assembler/nasm.git"
-
 # Ninja Settings
 NINJADIR="${SRCDIR}/ninja"
-NINJATAG="v1.11.0"
+NINJATAG="v1.11.1"
 NINJAVCS="https://github.com/ninja-build/ninja.git"
 
 # Wine Settings
 WINEDIR="${SRCDIR}/wine"
-WINETAG="wine-7.9"
+WINETAG="wine-8.17"
 WINEVCS="git://source.winehq.org/git/wine.git"
 
 
@@ -533,14 +528,13 @@ xtchain_build()
         for EXEC in dlltool ld objdump; do
             ln -sf ../${GENERIC}/bin/${EXEC}-wrapper ${BINDIR}/bin/${ARCH}-w64-mingw32-${EXEC}
         done
-        for EXEC in windres xtcspecc; do
+        for EXEC in bin2c exetool windres xtcspecc; do
             if [ ! -e ${BINDIR}/bin/${EXEC} ]; then
                 gcc ${WRKDIR}/tools/${EXEC}.c -o ${BINDIR}/bin/${EXEC}
             fi
             ln -sf ${EXEC} ${BINDIR}/bin/${ARCH}-w64-mingw32-${EXEC}
         done
     done
-    cp ${WRKDIR}/scripts/exetool ${BINDIR}/bin/
     cp ${WRKDIR}/scripts/xtclib ${BINDIR}/lib/xtchain/
     cp ${WRKDIR}/scripts/xtchain ${BINDIR}/
 }

patches/binutils/2_40/001-fix-compilation.patch

@@ -1,32 +0,0 @@
-diff --git a/gas/Makefile.in b/gas/Makefile.in
-index 8319181b472..e4386b38621 100644
---- a/gas/Makefile.in
-+++ b/gas/Makefile.in
-@@ -2231,7 +2231,7 @@ de-stage3:
- 
- doc/asconfig.texi: doc/$(CONFIG).texi doc/$(am__dirstamp)
- 	$(AM_V_at)rm -f doc/asconfig.texi
--	$(AM_V_GEN)cp $(srcdir)/doc/$(CONFIG).texi doc/asconfig.texi
-+	$(AM_V_GEN)cp -p $(srcdir)/doc/$(CONFIG).texi doc/asconfig.texi
- 	$(AM_V_at)chmod u+w doc/asconfig.texi
- 
- # Maintenance
-diff --git a/gas/doc/.dirstamp b/gas/doc/.dirstamp
-deleted file mode 100644
-index e69de29bb2d..00000000000
-diff --git a/gas/doc/local.mk b/gas/doc/local.mk
-index f611a50913c..de13e3ca8b8 100644
---- a/gas/doc/local.mk
-+++ b/gas/doc/local.mk
-@@ -41,7 +41,7 @@ TEXI2DVI = texi2dvi -I "$(srcdir)/%D%" -I %D% -I "$(srcdir)/../libiberty" \
- 
- %D%/asconfig.texi: %D%/$(CONFIG).texi %D%/$(am__dirstamp)
- 	$(AM_V_at)rm -f %D%/asconfig.texi
--	$(AM_V_GEN)cp $(srcdir)/%D%/$(CONFIG).texi %D%/asconfig.texi
-+	$(AM_V_GEN)cp -p $(srcdir)/%D%/$(CONFIG).texi %D%/asconfig.texi
- 	$(AM_V_at)chmod u+w %D%/asconfig.texi
- 
- CPU_DOCS = \
--- 
-2.39.2
-

patches/binutils/2_40/002-add-arm-architectures.patch

@@ -1,60 +0,0 @@
-From ec231dd4c9ceb09140178b79e30ed0917bb2c955 Mon Sep 17 00:00:00 2001
-From: belliash <belliash@codingworkshop.eu.org>
-Date: Sat, 25 Mar 2023 19:33:33 +0100
-Subject: [PATCH] test2
-
----
- bfd/config.bfd    | 8 +++++++-
- gas/configure.tgt | 3 ++-
- 2 files changed, 9 insertions(+), 2 deletions(-)
-
-diff --git a/bfd/config.bfd b/bfd/config.bfd
-index 1b0111fd410..ada7889d362 100644
---- a/bfd/config.bfd
-+++ b/bfd/config.bfd
-@@ -249,7 +249,7 @@ case "${targ}" in
-     targ_selvecs="aarch64_elf64_be_vec aarch64_elf32_le_vec aarch64_elf32_be_vec arm_elf32_le_vec arm_elf32_be_vec aarch64_pei_le_vec aarch64_pe_le_vec"
-     want64=true
-     ;;
--  aarch64-*-pe*)
-+  aarch64-*-pe* | aarch64-*-mingw32)
-     targ_defvec=aarch64_pe_le_vec
-     targ_selvecs="aarch64_pe_le_vec aarch64_pei_le_vec"
-     want64=true
-@@ -409,6 +409,12 @@ case "${targ}" in
-     targ_selvecs="arm_pe_le_vec arm_pe_be_vec arm_pei_le_vec arm_pei_be_vec"
-     targ_underscore=yes
-     ;;
-+  arm-*-mingw32)
-+    targ_defvec=arm_pe_le_vec
-+    targ_selvecs="arm_pe_le_vec arm_pe_be_vec arm_pei_le_vec arm_pei_be_vec"
-+    targ_underscore=no
-+    targ_cflags="-DARM_COFF_BUGFIX"
-+    ;;
-   arm-*-phoenix*)
-     targ_defvec=arm_elf32_le_vec
-     targ_selvecs=arm_elf32_be_vec
-diff --git a/gas/configure.tgt b/gas/configure.tgt
-index 765ba73633d..9bfef1f72e8 100644
---- a/gas/configure.tgt
-+++ b/gas/configure.tgt
-@@ -136,6 +136,7 @@ case ${generic_target} in
-   aarch64*-*-netbsd*)			fmt=elf em=nbsd;;
-   aarch64*-*-openbsd*)			fmt=elf;;
-   aarch64*-*-pe*)			fmt=coff em=pepaarch64 ;;
-+  aarch64*-*-mingw32)		fmt=coff em=pepaarch64 ;;
-   alpha-*-*vms*)			fmt=evax ;;
-   alpha-*-osf*)				fmt=ecoff ;;
-   alpha-*-linux*ecoff*)			fmt=ecoff ;;
-@@ -163,7 +164,7 @@ case ${generic_target} in
-   arm-*-nto*)				fmt=elf ;;
-   arm-wince-pe | arm-*-wince | arm*-*-mingw32ce* | arm*-*-cegcc*)
- 					fmt=coff em=wince-pe ;;
--  arm-*-pe)				fmt=coff em=pe ;;
-+  arm-*-pe | arm-*-mingw32)	fmt=coff em=pe ;;
-   arm-*-fuchsia*)			fmt=elf ;;
-   arm-*-haiku*)				fmt=elf em=haiku ;;
- 
--- 
-2.39.2
-

patches/binutils/2_41/001-add-arm-architectures.patch

@@ -0,0 +1,30 @@
+diff --git a/bfd/config.bfd b/bfd/config.bfd
+index bdee53957c0..04fff6e7df4 100644
+--- a/bfd/config.bfd
++++ b/bfd/config.bfd
+@@ -407,6 +407,12 @@ case "${targ}" in
+     targ_selvecs="arm_pe_le_vec arm_pe_be_vec arm_pei_le_vec arm_pei_be_vec"
+     targ_underscore=yes
+     ;;
++  arm-*-mingw*)
++    targ_defvec=arm_pe_le_vec
++    targ_selvecs="arm_pe_le_vec arm_pe_be_vec arm_pei_le_vec arm_pei_be_vec"
++    targ_underscore=no
++    targ_cflags="-DARM_COFF_BUGFIX"
++    ;;
+   arm-*-phoenix*)
+     targ_defvec=arm_elf32_le_vec
+     targ_selvecs=arm_elf32_be_vec
+diff --git a/gas/configure.tgt b/gas/configure.tgt
+index 3429f850d05..fa735da7ce6 100644
+--- a/gas/configure.tgt
++++ b/gas/configure.tgt
+@@ -164,7 +164,7 @@ case ${generic_target} in
+   arm-*-nto*)				fmt=elf ;;
+   arm-wince-pe | arm-*-wince | arm*-*-mingw32ce* | arm*-*-cegcc*)
+ 					fmt=coff em=wince-pe ;;
+-  arm-*-pe)				fmt=coff em=pe ;;
++  arm-*-pe | arm-*-mingw*)	fmt=coff em=pe ;;
+   arm-*-fuchsia*)			fmt=elf ;;
+   arm-*-haiku*)				fmt=elf em=haiku ;;
+ 

patches/cmake/v3.24.2/001-add-xtc-version-suffix.patch

@@ -1,13 +0,0 @@
-diff --git a/Source/CMakeVersion.cmake b/Source/CMakeVersion.cmake
-index 818109f0b7..749377d193 100644
---- a/Source/CMakeVersion.cmake
-+++ b/Source/CMakeVersion.cmake
-@@ -7,7 +7,7 @@ set(CMake_VERSION_IS_DIRTY 0)
- 
- # Start with the full version number used in tags.  It has no dev info.
- set(CMake_VERSION
--  "${CMake_VERSION_MAJOR}.${CMake_VERSION_MINOR}.${CMake_VERSION_PATCH}")
-+  "${CMake_VERSION_MAJOR}.${CMake_VERSION_MINOR}.${CMake_VERSION_PATCH}-XTC")
- if(DEFINED CMake_VERSION_RC)
-   set(CMake_VERSION "${CMake_VERSION}-rc${CMake_VERSION_RC}")
- endif()

patches/make/4.3/001-fix-find_in_given_path.patch

@@ -1,13 +0,0 @@
-diff --git a/src/job.c b/src/job.c
-index d6e28d3..f8f6950 100644
---- a/src/job.c
-+++ b/src/job.c
-@@ -2391,7 +2391,7 @@ child_execute_job (struct childbase *child, int good_stdin, char **argv)
-           }
-       }
- 
--    cmd = (char *)find_in_given_path (argv[0], p, 0);
-+    cmd = (char *)find_in_given_path (argv[0], p, 0, false);
-   }
- 
-   if (!cmd)

scripts/exetool

@@ -1,79 +0,0 @@
-#!/usr/bin/env python3
-
-import sys
-import struct
-
-if len(sys.argv) < 3:
-    print("XTChain ExeTool for modifying PE/COFF image subsystem\nNot sufficient parametrs. '[PE/COFF Image File]' '[SubSystem]'")
-    sys.exit(1)
-
-ImageFile = sys.argv[1]
-Subsystem = sys.argv[2].upper()
-
-# Set proper subsystem
-if Subsystem == "UNKNOWN":
-    ImageSubsystem = 0x00
-elif Subsystem == "NT_NATIVE":
-    ImageSubsystem = 0x01
-elif Subsystem == "WINDOWS_GUI":
-    ImageSubsystem = 0x02
-elif Subsystem == "WINDOWS_CLI":
-    ImageSubsystem = 0x03
-elif Subsystem == "WINDOWS_CE_OLD":
-    ImageSubsystem = 0x04
-elif Subsystem == "OS2_CUI":
-    ImageSubsystem = 0x05
-elif Subsystem == "POSIX_CUI":
-    ImageSubsystem = 0x07
-elif Subsystem == "NATIVE_WINDOWS":
-    ImageSubsystem = 0x08
-elif Subsystem == "WINDOWS_CE_GUI":
-    ImageSubsystem = 0x09
-elif Subsystem == "EFI_APPLICATION":
-    ImageSubsystem = 0x0A
-elif Subsystem == "EFI_BOOT_SERVICE_DRIVER":
-    ImageSubsystem = 0x0B
-elif Subsystem == "EFI_RUNTIME_DRIVER":
-    ImageSubsystem = 0x0C
-elif Subsystem == "EFI_ROM":
-    ImageSubsystem = 0x0D
-elif Subsystem == "XBOX":
-    ImageSubsystem = 0x0E
-elif Subsystem == "WINDOWS_BOOT_APPLICATION":
-    ImageSubsystem = 0x10
-elif Subsystem == "XT_NATIVE_KERNEL":
-    ImageSubsystem = 0x14
-elif Subsystem == "XT_NATIVE_APPLICATION":
-    ImageSubsystem = 0x15
-elif Subsystem == "XT_NATIVE_DRIVER":
-    ImageSubsystem = 0x16
-elif Subsystem == "XT_DYNAMIC_LIBRARY":
-    ImageSubsystem = 0x17
-elif Subsystem == "XT_APPLICATION_CLI":
-    ImageSubsystem = 0x18
-elif Subsystem == "XT_APPLICATION_GDI":
-    ImageSubsystem = 0x19
-else:
-    print("Invalid subsystem privided")
-    exit(2)
-
-# Open PE/COFF image file
-PeImage = open(sys.argv[1], "r+b")
-
-# Get PE header
-PeImage.seek(0x3C)
-(PeHeader,)=struct.unpack("H", PeImage.read(2))
-
-# Get PE signature
-PeImage.seek(PeHeader)
-(PeSignature,)=struct.unpack("I", PeImage.read(4))
-if PeSignature != 0x4550:
-    print("Invalid or corrupted PE header")
-
-# Set new image subsystem
-PeImage.seek(PeHeader + 0x5C)
-print("Setting subsystem to " + str(ImageSubsystem))
-PeImage.write(struct.pack("H", ImageSubsystem))
-
-# Close PE/COFF image file
-PeImage.close()

tools/bin2c.c

@@ -0,0 +1,74 @@
+/**
+ * PROJECT:     XTchain
+ * LICENSE:     See COPYING.md in the top level directory
+ * FILE:        tools/bin2c.c
+ * DESCRIPTION: Binary to C converter
+ * DEVELOPERS:  Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include "xtchain.h"
+
+int main(int argc, char *argv[])
+{
+    /* Check for proper number of arguments */
+    if(argc != 4)
+    {
+        printf("Usage: %s <input binary> <output file> <structure name>\n", argv[0]);
+        return 1;
+    }
+
+    /* Open the input binary file in binary mode */
+    FILE *inputFile = fopen(argv[1], "rb");
+    if(inputFile == NULL)
+    {
+        printf("Error: unable to open file %s\n", argv[1]);
+        return 1;
+    }
+
+    /* Open the destination source code file in text mode */
+    FILE *outputFile = fopen(argv[2], "w");
+    if(outputFile == NULL)
+    {
+        printf("Error: unable to open file %s\n", argv[2]);
+        fclose(inputFile);
+        return 1;
+    }
+
+    /* Get the size of the binary file */
+    fseek(inputFile, 0, SEEK_END);
+    long binSize = ftell(inputFile);
+    rewind(inputFile);
+
+    /* Allocate memory for the binary data */
+    unsigned char *binData = (unsigned char *)malloc(binSize);
+    if(binData == NULL)
+    {
+        printf("Error: unable to allocate memory for binary data\n");
+        fclose(inputFile);
+        fclose(outputFile);
+        return 1;
+    }
+
+    /* Read the binary data into memory */
+    fread(binData, sizeof(unsigned char), binSize, inputFile);
+
+    /* Write the C structure to the header file */
+    fprintf(outputFile, "unsigned char %s[] = {", argv[3]);
+    for(int i = 0; i < binSize; i++)
+    {
+        fprintf(outputFile, "0x%02X", binData[i]);
+        if(i < binSize - 1)
+        {
+            fprintf(outputFile, ",");
+        }
+    }
+    fprintf(outputFile, "};\nunsigned int %s_size = %ld;\n", argv[3], binSize);
+    free(binData);
+
+    /* Close all open files */
+    fclose(inputFile);
+    fclose(outputFile);
+
+    printf("Binary data converted to C structure successfully.\n");
+    return 0;
+}

tools/exetool.c

@@ -0,0 +1,167 @@
+/**
+ * PROJECT:     XTchain
+ * LICENSE:     See COPYING.md in the top level directory
+ * FILE:        tools/exetool.c
+ * DESCRIPTION: Portable Executable (PE) utility for changing subsystem
+ * DEVELOPERS:  Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include "xtchain.h"
+
+typedef struct _PE_SUBSYSTEM
+{
+    int Identifier;
+    char *Name;
+} PE_SUBSYSTEM, *PPE_SUBSYSTEM;
+
+static PE_SUBSYSTEM SubSystems[] = {
+    {0x00, "INVALID_SUBSYSTEM"},
+    {0x01, "NT_NATIVE"},
+    {0x02, "WINDOWS_GUI"},
+    {0x03, "WINDOWS_CLI"},
+    {0x04, "WINDOWS_CE_OLD"},
+    {0x05, "OS2_CUI"},
+    {0x07, "POSIX_CUI"},
+    {0x08, "NATIVE_WINDOWS"},
+    {0x09, "WINDOWS_CE_GUI"},
+    {0x0A, "EFI_APPLICATION"},
+    {0x0B, "EFI_BOOT_SERVICE_DRIVER"},
+    {0x0C, "EFI_RUNTIME_DRIVER"},
+    {0x0D, "EFI_ROM"},
+    {0x0E, "XBOX"},
+    {0x10, "WINDOWS_BOOT_APPLICATION"},
+    {0x14, "XT_NATIVE_KERNEL"},
+    {0x15, "XT_NATIVE_APPLICATION"},
+    {0x16, "XT_NATIVE_DRIVER"},
+    {0x17, "XT_DYNAMIC_LIBRARY"},
+    {0x18, "XT_APPLICATION_CLI"},
+    {0x19, "XT_APPLICATION_GDI"}
+};
+
+PPE_SUBSYSTEM getSubSystem(char *Name)
+{
+    int Index;
+    int SubSystemsCount;
+    PPE_SUBSYSTEM SubSystem;
+
+    /* Count number of subsystems avaialble */
+    SubSystemsCount = sizeof(SubSystems) / sizeof(PE_SUBSYSTEM);
+
+    /* Find subsystem */
+    for(Index = 0; Index < SubSystemsCount; Index++)
+    {
+        SubSystem = &SubSystems[Index];
+        if(strcasecmp(SubSystem->Name, Name) == 0)
+        {
+            /* Subsystem found, return its ID */
+            return SubSystem;
+        }
+    }
+
+	/* No valid subsystem found */
+    return &SubSystems[0];
+}
+
+char *getSubSystemName(int Identifier)
+{
+    int Index;
+    int SubSystemsCount;
+    PPE_SUBSYSTEM SubSystem;
+
+    /* Count number of subsystems avaialble */
+    SubSystemsCount = sizeof(SubSystems) / sizeof(PE_SUBSYSTEM);
+
+    /* Find subsystem */
+    for(Index = 0; Index < SubSystemsCount; Index++)
+    {
+        SubSystem = &SubSystems[Index];
+        if(SubSystem->Identifier == Identifier)
+        {
+            /* Subsystem found, return its ID */
+            return SubSystem->Name;
+        }
+    }
+
+	/* No valid subsystem found */
+    return SubSystems[0].Name;
+}
+
+int main(int argc, char *argv[])
+{
+    FILE *ExeFile;
+    unsigned char Signature[4];
+    unsigned int HeaderOffset;
+    unsigned short SubSystem;
+    PPE_SUBSYSTEM NewSubSystem;
+
+    /* Check for proper number of arguments */
+    if(argc != 3)
+    {
+        printf("Usage: %s <filename> <new SubSystem>\n", argv[0]);
+        return 1;
+    }
+
+    /* Open the EXE file in binary mode */
+    ExeFile = fopen(argv[1], "r+b");
+    if(ExeFile == NULL)
+    {
+        /* Failed to open PE file */
+        printf("ERROR: Unable to open file %s\n", argv[1]);
+        return 1;
+    }
+    
+    /* Verify that the input file has a valid DOS header */
+    fread(Signature, sizeof(unsigned char), 4, ExeFile);
+    if(Signature[0] != 'M' || Signature[1] != 'Z')
+    {
+        /* Invalid DOS header */
+        printf("ERROR: %s is not a valid EXE file\n", argv[1]);
+        fclose(ExeFile);
+        return 1;
+    }
+
+    /* Verify that the input file has a valid PE header */
+    fseek(ExeFile, 0x3C, SEEK_SET);
+    fread(&HeaderOffset, sizeof(unsigned int), 1, ExeFile);
+    fseek(ExeFile, HeaderOffset, SEEK_SET);
+    fread(Signature, sizeof(unsigned char), 4, ExeFile);
+    if(Signature[0] != 'P' || Signature[1] != 'E' || Signature[2] != 0 || Signature[3] != 0)
+    {
+        /* Invalid PE header */
+        printf("Error: %s is not a valid PE file\n", argv[1]);
+        fclose(ExeFile);
+        return 1;
+    }
+
+    /* Seek to the offset of the SubSystem field in the optional header */
+    fseek(ExeFile, HeaderOffset + 0x5C, SEEK_SET);
+
+    /* Read the current SubSystem value */
+    fread(&SubSystem, sizeof(unsigned short), 1, ExeFile);
+    printf("Original SubSystem: 0x%04X <%s>\n", SubSystem, getSubSystemName(SubSystem));
+
+    /* Parse the new SubSystem value from the command line argument */
+    NewSubSystem = getSubSystem(argv[2]);
+    if(NewSubSystem->Identifier == 0)
+    {
+        /* Invalid SubSystem provided */
+        printf("Error: %s is not a valid PE SubSystem\n", argv[2]);
+        return 1;
+    }
+
+    /* Print new SubSystem identifier */
+    printf("New SubSystem: 0x%04X <%s>\n", NewSubSystem->Identifier, NewSubSystem->Name);
+
+    /* Seek back to the SubSystem field in the optional header */
+    fseek(ExeFile, -sizeof(unsigned short), SEEK_CUR);
+
+    /* Write the new SubSystem value */
+    fwrite(&NewSubSystem->Identifier, sizeof(unsigned short), 1, ExeFile);
+
+    /* Close the file */
+    fclose(ExeFile);
+
+    /* Finished successfully */
+    printf("SubSystem successfully modified!\n");
+    return 0;
+}