The stepi command steps one machine instruction (stepping into calls). It is valid only in native mode.
Single-step one machine instruction (step into calls).
Single step n machine instructions (step into calls).
Step and deliver the specified signal.
Step the given LWP.
Step the LWP on which the specified thread is active.
where:
n is the number of instructions to step.
signal is the name of a signal.
lwp-ID is an LWP ID.
thread-ID is a thread ID.