diff --git a/include/arch/i386/sys/io.h b/include/arch/i386/sys/io.h
new file mode 100644
index 0000000..48c862e
--- /dev/null
+++ b/include/arch/i386/sys/io.h
@@ -0,0 +1,126 @@
+#ident "$Id: io.h,v 1.1 2004/01/25 01:34:28 hpa Exp $"
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 2004 H. Peter Anvin - All Rights Reserved
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or
+ *   sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following
+ *   conditions:
+ *   
+ *   The above copyright notice and this permission notice shall
+ *   be included in all copies or substantial portions of the Software.
+ *   
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * sys/io.h for the i386 architecture
+ *
+ * Basic I/O macros
+ */
+
+#ifndef _SYS_IO_H
+#define _SYS_IO_H 1
+
+/* I/O-related system calls */
+
+int iopl(int);
+int ioperm(unsigned long, unsigned long, int);
+
+/* Basic I/O macros */
+
+static __inline__ void
+outb(unsigned char __v, unsigned short __p)
+{
+  asm volatile("outb %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ void
+outw(unsigned short __v, unsigned short __p)
+{
+  asm volatile("outw %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ void
+outl(unsigned int __v, unsigned short __p)
+{
+  asm volatile("outl %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ unsigned char
+inb(unsigned short __p)
+{
+  unsigned char __v;
+  asm volatile("inb %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+static __inline__ unsigned short
+inw(unsigned short __p)
+{
+  unsigned short __v;
+  asm volatile("inw %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+static __inline__ unsigned int
+inl(unsigned short __p)
+{
+  unsigned int __v;
+  asm volatile("inl %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+/* String I/O macros */
+
+static __inline__ void
+outsb (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsb" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+outsw (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsw" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+outsl (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsl" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+
+static __inline__ void
+insb (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insb" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+insw (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insw" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+insl (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insl" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+#endif /* _SYS_IO_H */
diff --git a/include/arch/i386/sys/vm86.h b/include/arch/i386/sys/vm86.h
new file mode 100644
index 0000000..d327239
--- /dev/null
+++ b/include/arch/i386/sys/vm86.h
@@ -0,0 +1,41 @@
+#ident "$Id: vm86.h,v 1.1 2004/01/25 01:34:28 hpa Exp $"
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 2004 H. Peter Anvin - All Rights Reserved
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or
+ *   sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following
+ *   conditions:
+ *   
+ *   The above copyright notice and this permission notice shall
+ *   be included in all copies or substantial portions of the Software.
+ *   
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * sys/vm86.h for i386
+ */
+
+#ifndef _SYS_VM86_H
+#define _SYS_VM86_H 1
+
+#include <asm/vm86.h>
+
+/* Actual system call */
+int vm86(struct vm86_struct *);
+
+#endif
diff --git a/include/arch/x86_64/sys/io.h b/include/arch/x86_64/sys/io.h
new file mode 100644
index 0000000..4a0ae44
--- /dev/null
+++ b/include/arch/x86_64/sys/io.h
@@ -0,0 +1,126 @@
+#ident "$Id: io.h,v 1.1 2004/01/25 01:34:29 hpa Exp $"
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 2004 H. Peter Anvin - All Rights Reserved
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or
+ *   sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following
+ *   conditions:
+ *   
+ *   The above copyright notice and this permission notice shall
+ *   be included in all copies or substantial portions of the Software.
+ *   
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * sys/io.h for the i386 architecture
+ *
+ * Basic I/O macros
+ */
+
+#ifndef _SYS_IO_H
+#define _SYS_IO_H 1
+
+/* I/O-related system calls */
+
+int iopl(int);
+int ioperm(unsigned long, unsigned long, int);
+
+/* Basic I/O macros */
+
+static __inline__ void
+outb(unsigned char __v, unsigned short __p)
+{
+  asm volatile("outb %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ void
+outw(unsigned short __v, unsigned short __p)
+{
+  asm volatile("outw %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ void
+outl(unsigned int __v, unsigned short __p)
+{
+  asm volatile("outl %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ unsigned char
+inb(unsigned short __p)
+{
+  unsigned char __v;
+  asm volatile("inb %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+static __inline__ unsigned short
+inw(unsigned short __p)
+{
+  unsigned short __v;
+  asm volatile("inw %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+static __inline__ unsigned int
+inl(unsigned short __p)
+{
+  unsigned int __v;
+  asm volatile("inl %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+/* String I/O macros */
+
+static __inline__ void
+outsb (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsb" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+outsw (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsw" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+outsl (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsl" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+
+static __inline__ void
+insb (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insb" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+insw (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insw" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+insl (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insl" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+#endif /* _SYS_IO_H */
diff --git a/klibc/SYSCALLS b/klibc/SYSCALLS
index 0648777..00883cc 100644
--- a/klibc/SYSCALLS
+++ b/klibc/SYSCALLS
@@ -145,3 +145,10 @@
 <!ia64> int query_module(const char *, int, void *, size_t, size_t)
 int reboot::__reboot(int, int, int, void *)
 int syslog::klogctl(int, char *, int)
+
+#
+# Low-level I/O (generally architecture-specific)
+#
+<i386,x86_64> int iopl(int)
+<i386,x86_64> int ioperm(unsigned long, unsigned long, int)
+<i386> int vm86(struct vm86_struct *)
diff --git a/klibc/arch/i386/include/sys/io.h b/klibc/arch/i386/include/sys/io.h
new file mode 100644
index 0000000..48c862e
--- /dev/null
+++ b/klibc/arch/i386/include/sys/io.h
@@ -0,0 +1,126 @@
+#ident "$Id: io.h,v 1.1 2004/01/25 01:34:28 hpa Exp $"
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 2004 H. Peter Anvin - All Rights Reserved
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or
+ *   sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following
+ *   conditions:
+ *   
+ *   The above copyright notice and this permission notice shall
+ *   be included in all copies or substantial portions of the Software.
+ *   
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * sys/io.h for the i386 architecture
+ *
+ * Basic I/O macros
+ */
+
+#ifndef _SYS_IO_H
+#define _SYS_IO_H 1
+
+/* I/O-related system calls */
+
+int iopl(int);
+int ioperm(unsigned long, unsigned long, int);
+
+/* Basic I/O macros */
+
+static __inline__ void
+outb(unsigned char __v, unsigned short __p)
+{
+  asm volatile("outb %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ void
+outw(unsigned short __v, unsigned short __p)
+{
+  asm volatile("outw %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ void
+outl(unsigned int __v, unsigned short __p)
+{
+  asm volatile("outl %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ unsigned char
+inb(unsigned short __p)
+{
+  unsigned char __v;
+  asm volatile("inb %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+static __inline__ unsigned short
+inw(unsigned short __p)
+{
+  unsigned short __v;
+  asm volatile("inw %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+static __inline__ unsigned int
+inl(unsigned short __p)
+{
+  unsigned int __v;
+  asm volatile("inl %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+/* String I/O macros */
+
+static __inline__ void
+outsb (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsb" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+outsw (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsw" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+outsl (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsl" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+
+static __inline__ void
+insb (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insb" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+insw (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insw" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+insl (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insl" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+#endif /* _SYS_IO_H */
diff --git a/klibc/arch/i386/include/sys/vm86.h b/klibc/arch/i386/include/sys/vm86.h
new file mode 100644
index 0000000..d327239
--- /dev/null
+++ b/klibc/arch/i386/include/sys/vm86.h
@@ -0,0 +1,41 @@
+#ident "$Id: vm86.h,v 1.1 2004/01/25 01:34:28 hpa Exp $"
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 2004 H. Peter Anvin - All Rights Reserved
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or
+ *   sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following
+ *   conditions:
+ *   
+ *   The above copyright notice and this permission notice shall
+ *   be included in all copies or substantial portions of the Software.
+ *   
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * sys/vm86.h for i386
+ */
+
+#ifndef _SYS_VM86_H
+#define _SYS_VM86_H 1
+
+#include <asm/vm86.h>
+
+/* Actual system call */
+int vm86(struct vm86_struct *);
+
+#endif
diff --git a/klibc/arch/x86_64/include/sys/io.h b/klibc/arch/x86_64/include/sys/io.h
new file mode 100644
index 0000000..4a0ae44
--- /dev/null
+++ b/klibc/arch/x86_64/include/sys/io.h
@@ -0,0 +1,126 @@
+#ident "$Id: io.h,v 1.1 2004/01/25 01:34:29 hpa Exp $"
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 2004 H. Peter Anvin - All Rights Reserved
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or
+ *   sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following
+ *   conditions:
+ *   
+ *   The above copyright notice and this permission notice shall
+ *   be included in all copies or substantial portions of the Software.
+ *   
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * sys/io.h for the i386 architecture
+ *
+ * Basic I/O macros
+ */
+
+#ifndef _SYS_IO_H
+#define _SYS_IO_H 1
+
+/* I/O-related system calls */
+
+int iopl(int);
+int ioperm(unsigned long, unsigned long, int);
+
+/* Basic I/O macros */
+
+static __inline__ void
+outb(unsigned char __v, unsigned short __p)
+{
+  asm volatile("outb %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ void
+outw(unsigned short __v, unsigned short __p)
+{
+  asm volatile("outw %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ void
+outl(unsigned int __v, unsigned short __p)
+{
+  asm volatile("outl %0,%1" : : "a" (__v), "dN" (__p));
+}
+
+static __inline__ unsigned char
+inb(unsigned short __p)
+{
+  unsigned char __v;
+  asm volatile("inb %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+static __inline__ unsigned short
+inw(unsigned short __p)
+{
+  unsigned short __v;
+  asm volatile("inw %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+static __inline__ unsigned int
+inl(unsigned short __p)
+{
+  unsigned int __v;
+  asm volatile("inl %1,%0" : "=a" (__v) : "dN" (__p));
+  return v;
+}
+
+/* String I/O macros */
+
+static __inline__ void
+outsb (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsb" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+outsw (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsw" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+outsl (unsigned short __p, const void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; outsl" : "+S" (__d), "+c" (__n) : "d" (__p));
+}
+
+
+static __inline__ void
+insb (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insb" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+insw (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insw" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+static __inline__ void
+insl (unsigned short __p, void *__d, unsigned long __n)
+{
+  asm volatile("cld; rep; insl" : "+D" (__d), "+c" (__n) : "d" (__p));
+}
+
+#endif /* _SYS_IO_H */
diff --git a/klibc/syscommon.h b/klibc/syscommon.h
index 916d4eb..3093920 100644
--- a/klibc/syscommon.h
+++ b/klibc/syscommon.h
@@ -26,3 +26,7 @@
 #include <sys/vfs.h>
 #include <sys/wait.h>
 #include <unistd.h>
+
+#ifdef __i386__
+#include <sys/vm86.h>
+#endif