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<title>BPF-Pseudo-Maps (Using as)</title>

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<a name="BPF_002dPseudo_002dMaps"></a>
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<a name="Pseudo-Maps"></a>
<h4 class="subsubsection">9.7.2.3 Pseudo Maps</h4>

<a name="index-pseudo-map-fd_002c-BPF"></a>
<p>The &lsquo;<samp>LDDW</samp>&rsquo; instruction can take a literal pseudo map file
descriptor as its second argument.  This uses the syntax
&lsquo;<samp>%map_fd(N)</samp>&rsquo; where &lsquo;<samp>N</samp>&rsquo; is a signed number.
</p>
<p>For example, to load the address of the pseudo map with file
descriptor &lsquo;<samp>2</samp>&rsquo; in register &lsquo;<samp>r1</samp>&rsquo; we would do:
</p>
<div class="smallexample">
<pre class="smallexample">        lddw %r1, %map_fd(2)
</pre></div>


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