Curious Yellow v0.01 is example code for Fun and Games with FreeBSD Kernel modules. Contains examples for all the different kernel alteration methods plus several small tools that can also be used for detection and defense.
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Fun and Games with FreeBSD Kernel Modules - Kernel hacking using kernel modules and kmem patching. Contains information on how to intercept system calls and other calls in the kernel by altering the corresponding call table. Also shows how to alter these tables by writing to kernel memory and gives an example of patching the kernel directly without the use of modules. Furthermore an example is given on how the symbol table in the kernel can be altered.
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