60 lines
2.5 KiB
HTML
60 lines
2.5 KiB
HTML
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<title>BPF-Pseudo-Maps - Using as</title>
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<a name="BPF-Pseudo-Maps"></a>
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<a name="BPF_002dPseudo_002dMaps"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="BPF_002dRegs.html#BPF_002dRegs">BPF-Regs</a>,
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Up: <a rel="up" accesskey="u" href="BPF-Syntax.html#BPF-Syntax">BPF Syntax</a>
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<h5 class="subsubsection">9.7.2.3 Pseudo Maps</h5>
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<p><a name="index-pseudo-map-fd_002c-BPF-864"></a>The ‘<samp><span class="samp">LDDW</span></samp>’ instruction can take a literal pseudo map file
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descriptor as its second argument. This uses the syntax
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‘<samp><span class="samp">%map_fd(N)</span></samp>’ where ‘<samp><span class="samp">N</span></samp>’ is a signed number.
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<p>For example, to load the address of the pseudo map with file
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descriptor ‘<samp><span class="samp">2</span></samp>’ in register ‘<samp><span class="samp">r1</span></samp>’ we would do:
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<pre class="smallexample"> lddw %r1, %map_fd(2)
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</pre>
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</body></html>
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