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

# function::u\_register(3stap)

Return the unsigned value of the named CPU register

## 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.

## SEE ALSO0

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