Import the "gerbert" kernel I worked on earlier this year.

It's a lot crappier than I remembered it. It's gonna need a lot of work.

Kernel/Userspace.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "types.h"
+
+namespace Userspace {
+
+int open(const char* path);
+int close(int fd);
+int read(int fd, void* outbuf, size_t nread);
+int seek(int fd, int offset);
+int kill(pid_t pid, int sig);
+uid_t getuid();
+void sleep(DWORD ticks);
+
+}