Generate Mach-O files with ARM64 headers for specified file types.

I. Mach-O/python/create_macho_samples.py

@@ -0,0 +1,43 @@
+import struct
+
+# Mach-O magic number for 64-bit
+MAGIC_64 = 0xFEEDFACF
+
+# Correct file type codes for each specified Mach-O file type
+file_types = {
+    "FVMLIB": 0x3,       # MH_FVMLIB
+    "PRELOAD": 0x5,      # MH_PRELOAD
+    "CORE": 0x4,         # MH_CORE
+    "DYLIB_STUB": 0x9,   # MH_DYLIB_STUB
+}
+
+def create_macho_file(file_type_name, file_type_code):
+    # Updated settings for ARM64 architecture
+    magic = MAGIC_64
+    cpu_type = 0x100000C  # CPU_TYPE_ARM64
+    cpu_subtype = 0x0     # ARM64 subtype
+    ncmds = 0             # Number of load commands
+    sizeofcmds = 0        # Total size of all load commands
+    flags = 0x0           # No special flags
+
+    # Pack the Mach-O header for a 64-bit file
+    header = struct.pack(
+        "<Iiiiiii",  # Format for Mach-O 64-bit header
+        magic,
+        cpu_type,
+        cpu_subtype,
+        file_type_code,
+        ncmds,
+        sizeofcmds,
+        flags
+    )
+
+    # Write the header to a new file
+    with open(f"{file_type_name}.macho", "wb") as f:
+        f.write(header)
+        f.write(b'\x00' * 1024)  # Add some padding as placeholder content
+
+# Generate files with the correct headers
+for name, code in file_types.items():
+    create_macho_file(name, code)
+    print(f"Created {name}.macho with ARM64 and file type {hex(code)}")