🚀 go-pugleaf

In article <1992Oct6.144220.2790@unlinfo.unl.edu> romig@cse.unl.edu (Phil Romig) writes:

      I'd like a
      way to define a command that will step forward one instruction and
      disassemble the instruction at the pc.  I think I'm close with:
	     define sd
	      stepi
	      x/i <address of pc>
	     end
      the problem is how to get <address of pc> into the x/i command.  
      Anyone have any ideas?

You can get what you want much more easily by using "display/i $pc",
and then just stepping normally, setting breakpoints & continuing,
etc.

If you're working on a RISC machine on which the PC is a two-element
queue, you may also want to do something along the lines of:

display/i $npc
display/i $pc

or (on HP PA machines):

display/i $pcoqt	(that's "program counter offset queue tail")
display/i $pcoqh		and			      head")

to display the next two instructions. (you have to do the display of
$npc *before* $pc because displays show up in reverse order for some
reason).

					- Bill