---
name: "function::regparm"
section: "3stap"
platform: "linux"
package: "systemtap-doc"
version: "5.1-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/function::regparm"
---

# function::regparm(3stap)

Specify regparm value used to compile function

## 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 ALSO0

[*tapset::registers*(3stap)](/tapset::registers/3stap.md)