to_resume. Function to tell the target to start running again (or for the first time).

to_wait. Function to wait for the target to return control to the debugger. Typically control returns when the target finishes execution or hits a breakpoint. It could also occur if the connection is interrupted (for example by ctrl-C).

to_stop. Function to stop the target—used whenever the target is to be interrupted (for example by ctrl-C).

to_kill. Kill the connection to the target. This should work, even if the connection to the target is broken.

to_create_inferior. For targets which can execute, this initializes a program to run, ready for it to start executing. It is invoked by the GDB run command, which will subsequently call to_resume to start execution.

to_mourn_inferior. Tidy up after execution of the target has finished (for example after it has exited or been killed). Most implementations call the generic function, generic_mourn_inferior, but may do some additional tidying up.