This chapter describes the debugger modules, dcmds, and walkers provided to debug the Oracle Solaris kernel. Each kernel debugger module is named after the corresponding kernel module, so that it will be loaded automatically by MDB. The facilities described here reflect the current kernel implementation. In general, the kernel debugging facilities described in this chapter are meaningful only in the context of the corresponding kernel subsystem implementation. See Using This Documentation for references that provide additional information about the Oracle Solaris kernel implementation.