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+# Putting rickrolling in kernel space
+
+Kernelroll is a linux kernel module for advanced rickrolling.
+
+It works by patching the open() system call to open a specified music file
+instead of other music files. Currently, it only checks if the file extension
+"mp3" is present and calls the original open() with the supplied path
+instead.
+
+WARNING: There is probably a performance penalty and your kernel might crash
+at a very inappropriate time and cause data loss! You are responsible for
+the code you load into your kernel!
+
+But most probably, it will be alright! ;)
+
+# Installation
+
+You need the address of sys_call_table in your kernel. Use
+
+    $ grep sys_call_table /boot/System.map-3.0.0-1-amd64
+    ffffffff81400300 R sys_call_table
+
+on the respective System.map of your kernel to find out the address
+
+Now fire up kernelroll.c and add yours:
+
+    void **sys_call_table = (void **)0xffffffff81400300;
+
+This will probably be simplified in the future, but as sys_call_table isn't
+exported anymore in 2.6 kernels, we have to use some tricks.
+
+Compile with:
+
+    $ make
+
+Load with:
+
+    $ insmod kernelroll.ko rollfile=/path/to/rickroll.mp3
+
+Fire up a music player of your choice, play a song and consider yourself
+kernelrolled. ;)