89 lines
3.6 KiB
HTML
89 lines
3.6 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Using as: BPF-Pseudo-Maps</title>
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<meta name="description" content="Using as: BPF-Pseudo-Maps">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="BPF-Syntax.html#BPF-Syntax" rel="up" title="BPF Syntax">
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<link href="BPF-Directives.html#BPF-Directives" rel="next" title="BPF Directives">
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<link href="BPF_002dRegs.html#BPF_002dRegs" rel="previous" title="BPF-Regs">
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<a name="BPF_002dPseudo_002dMaps"></a>
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<div class="header">
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<p>
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Previous: <a href="BPF_002dRegs.html#BPF_002dRegs" accesskey="p" rel="previous">BPF-Regs</a>, Up: <a href="BPF-Syntax.html#BPF-Syntax" accesskey="u" rel="up">BPF Syntax</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Pseudo-Maps"></a>
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<h4 class="subsubsection">9.7.2.3 Pseudo Maps</h4>
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<a name="index-pseudo-map-fd_002c-BPF"></a>
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<p>The ‘<samp>LDDW</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>%map_fd(N)</samp>’ where ‘<samp>N</samp>’ is a signed number.
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</p>
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<p>For example, to load the address of the pseudo map with file
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descriptor ‘<samp>2</samp>’ in register ‘<samp>r1</samp>’ we would do:
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</p>
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<div class="smallexample">
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<pre class="smallexample"> lddw %r1, %map_fd(2)
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</pre></div>
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