centos man page for function::u_register

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

NAME
       function::u_register - Return the unsigned value of the named CPU register

SYNOPSIS
	   u_register:long(name:string)

ARGUMENTS
       name
	   Name of the register to return

DESCRIPTION
       Same as register(name), except that if the register is 32 bits wide, it is zero-extended to 64 bits.

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