All of the "resuming" ptracer requests treat the data argument the same. Those are PTRACE_CONT, PTRACE_SYSCALL, PTRACE_*STEP, PTRACE_SYSEMU*. The data argument is either 0 or a signal number. The addr argument is ignored by all these. Roland -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html