centos man page for function::registers_valid

FUNCTION::REGISTERS_(3stap)					 Context Functions				       FUNCTION::REGISTERS_(3stap)

NAME
       function::registers_valid - Determines validity of register and u_register in current context

SYNOPSIS
	   registers_valid:long()

ARGUMENTS
       None

DESCRIPTION
       This function returns 1 if register and u_register can be used in the current context, or 0 otherwise. For example, registers_valid returns
       0 when called from a begin or end probe.

SystemTap Tapset Reference					     June 2014					       FUNCTION::REGISTERS_(3stap)