FUNCTION::SET\_U64\_AR(3stap) Context Functions FUNCTION::SET\_U64\_AR(3stap)

# [NAME](#NAME)

function::set\_u64\_arg - Set function argument as unsigned 64-bit value

# [SYNOPSIS](#SYNOPSIS)

```


    set_u64_arg(n:long,v:long)
```

# [ARGUMENTS](#ARGUMENTS)

*n*

index of argument to return

*v*

value to set

# [DESCRIPTION](#DESCRIPTION)

Set the unsigned 64-bit value of argument n, same as ulonglong\_arg.

# [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::set_u64_arg(3stap) from systemtap 5.6-r0 (Chainguard OS)
Source: https://sourceware.org/git/systemtap.git