kernel - Enhance the examine (x) command.

kernel - Enhance the examine (x) command.

* Change x/a to work similar to gdb.  The content of the memory is
  treated as an address, printed symbolically and the address is advanced.
  This way you can x/a <stack_address> and then just hit return a bunch
  of times to locate useful data on the stack.

* Add x/p.  The content of the memory is treated as an address and
  printed as hex.