Provided by: systemtap-doc_3.1-3ubuntu0.1_all 

NAME
function::regparm - Specify regparm value used to compile function
SYNOPSIS
regparm(n:long)
ARGUMENTS
n
original regparm value
DESCRIPTION
Call this function with argument n before accessing function arguments using the *_arg function is the
function was build with the gcc -mregparm=n option.
(The i386 kernel is built with \-mregparm=3, so systemtap considers regparm(3) the default for kernel
functions on that architecture.) Only valid on i386 and x86_64 (when probing 32bit applications).
Produces an error on other architectures.
SEE ALSO
tapset::registers(3stap)
SystemTap Tapset Reference March 2016 FUNCTION::REGPARM(3stap)