60 lines
2.5 KiB
HTML
60 lines
2.5 KiB
HTML
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<html lang="en">
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<head>
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<title>BPF-Pseudo-Maps - Using as</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="Using as">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="BPF-Syntax.html#BPF-Syntax" title="BPF Syntax">
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<link rel="prev" href="BPF_002dRegs.html#BPF_002dRegs" title="BPF-Regs">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled ``GNU Free Documentation License''.
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<style type="text/css"><!--
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--></style>
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</head>
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<body>
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<div class="node">
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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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<hr>
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</div>
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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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