FUNCTION::U\_REGISTER(3stap) Context Functions FUNCTION::U\_REGISTER(3stap)

# [NAME](#NAME)

function::u\_register - Return the unsigned value of the named CPU register

# [SYNOPSIS](#SYNOPSIS)

```


    u_register:long(name:string)
```

# [ARGUMENTS](#ARGUMENTS)

*name*

Name of the register to return

# [DESCRIPTION](#DESCRIPTION)

Same as [register(name)](/man/enterprise-packages/systemtap/register.name), except that if the register is 32 bits wide, it is zero-extended to 64 bits.

# [SEE ALSO0](#SEE_ALSO0)

[*tapset::registers*(3stap)](/man/enterprise-packages/systemtap/tapset::registers.3stap)

September 2026 SystemTap Tapset Reference Ver

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Document: function::u_register(3stap) from systemtap 5.6-r1 (Chainguard OS)
Source: https://sourceware.org/git/systemtap.git