Index: libc/include/io/io.h
===================================================================
--- libc/include/io/io.h	(revision 18acad554ff6cb14b78fd376e87bd4ce4724c792)
+++ libc/include/io/io.h	(revision 18acad554ff6cb14b78fd376e87bd4ce4724c792)
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2006 Josef Cejka
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __LIBC__IO_H__
+#define __LIBC__IO_IO_H__
+
+#include <types.h>
+
+int putnchars(const char * buf, size_t count);
+int putstr(const char * str);
+
+#endif
Index: libc/include/stdarg.h
===================================================================
--- libc/include/stdarg.h	(revision 18acad554ff6cb14b78fd376e87bd4ce4724c792)
+++ libc/include/stdarg.h	(revision 18acad554ff6cb14b78fd376e87bd4ce4724c792)
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2006 Josef Cejka
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __LIBC__STDARG_H__
+#define __LIBC__STDARG_H__
+
+#ifndef __VARARGS_DEFINED
+#define __VARARGS_DEFINED
+
+/*
+ * Variable argument list manipulation macros
+ * for architectures using stack to pass arguments.
+ */
+ 
+#include <types.h>
+
+typedef struct va_list {
+	int pos;
+	uint8_t *last;
+} va_list;
+
+#define va_start(ap, lst) 		\
+	(ap).pos = sizeof(lst); 			\
+	(ap).last = (uint8_t *) &(lst)
+
+#define va_arg(ap, type) 		\
+	(*((type *)((ap).last + ((ap).pos  += sizeof(type) ) - sizeof(type))))
+
+#define va_end(ap)
+
+#endif
+
+
+#endif
Index: libc/include/stddef.h
===================================================================
--- libc/include/stddef.h	(revision 18acad554ff6cb14b78fd376e87bd4ce4724c792)
+++ libc/include/stddef.h	(revision 18acad554ff6cb14b78fd376e87bd4ce4724c792)
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2006 Josef Cejka
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __LIBC__STDDEF_H__
+#define __LIBC__STDDEF_H__
+
+#include <types.h>
+
+#endif
+
Index: libc/include/stdio.h
===================================================================
--- libc/include/stdio.h	(revision df50cf6aec469fdb0aae1ef0280373f8ac8fc15e)
+++ libc/include/stdio.h	(revision 18acad554ff6cb14b78fd376e87bd4ce4724c792)
@@ -32,7 +32,9 @@
 #include <types.h>
 
-#define EOF -1
+#define EOF (-1)
 
 extern int puts(const char * str);
 
+extern int printf(const char *fmt, ...);
+
 #endif
