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diff --git a/geekos/include/geekos/argblock.h b/geekos/include/geekos/argblock.h
new file mode 100644
index 0000000..54fac8b
--- /dev/null
+++ b/geekos/include/geekos/argblock.h
@@ -0,0 +1,34 @@
+/*
+ * Create and extract the command line argument block for a process
+ * Copyright (c) 2003 David H. Hovemeyer <daveho@cs.umd.edu>
+ * $Revision: 1.1 $
+ * 
+ * This is free software.  You are permitted to use,
+ * redistribute, and modify it as specified in the file "COPYING".
+ */
+
+#ifndef GEEKOS_ARGBLOCK_H
+#define GEEKOS_ARGBLOCK_H
+
+/**
+ * Header struct for accessing argument block from user mode.
+ * Just cast the address of the argument block passed by
+ * the kernel to a pointer to this struct.
+ */
+struct Argument_Block {
+    int argc;
+    char **argv;
+};
+
+#ifdef GEEKOS
+
+/*
+ * Functions used by the kernel to create the argument block.
+ */
+void Get_Argument_Block_Size(const char *command, unsigned *numArgs, ulong_t *argBlockSize);
+void Format_Argument_Block(char *argBlock, unsigned numArgs, ulong_t userAddress,
+    const char *command);
+
+#endif
+
+#endif  /* GEEKOS_ARGBLOCK_H */