Step one machine instruction (step over calls).
Step n machine instructions (step over calls).
Deliver the given signal while stepping.
Step the given LWP.
Step the LWP on which the given thread is active. Will not implicitly resume all LWPs when stepping over a function.
n is the number of instructions to step.
signal is the name of a signal.
thread_id is a thread ID.
lwp_id is an LWP ID.