72 lines
3.6 KiB
HTML
72 lines
3.6 KiB
HTML
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<html lang="en">
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<title>Retrieving Descriptions - Debugging with GDB</title>
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<meta name="description" content="Debugging with GDB">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Target-Descriptions.html#Target-Descriptions" title="Target Descriptions">
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<link rel="next" href="Target-Description-Format.html#Target-Description-Format" title="Target Description Format">
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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 or
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any later version published by the Free Software Foundation; with the
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Free Documentation'', with the Front-Cover Texts being ``A GNU Manual,''
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and with the Back-Cover Texts as in (a) below.
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</head>
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<body>
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<div class="node">
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<a name="Retrieving-Descriptions"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Target-Description-Format.html#Target-Description-Format">Target Description Format</a>,
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Up: <a rel="up" accesskey="u" href="Target-Descriptions.html#Target-Descriptions">Target Descriptions</a>
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<hr>
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</div>
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<h3 class="section">G.1 Retrieving Descriptions</h3>
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<p>Target descriptions can be read from the target automatically, or
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specified by the user manually. The default behavior is to read the
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description from the target. <span class="sc">gdb</span> retrieves it via the remote
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protocol using ‘<samp><span class="samp">qXfer</span></samp>’ requests (see <a href="General-Query-Packets.html#General-Query-Packets">qXfer</a>). The <var>annex</var> in the ‘<samp><span class="samp">qXfer</span></samp>’ packet will be
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‘<samp><span class="samp">target.xml</span></samp>’. The contents of the ‘<samp><span class="samp">target.xml</span></samp>’ annex are an
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XML document, of the form described in <a href="Target-Description-Format.html#Target-Description-Format">Target Description Format</a>.
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<p>Alternatively, you can specify a file to read for the target description.
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If a file is set, the target will not be queried. The commands to
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specify a file are:
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<a name="index-set-tdesc-filename-3639"></a>
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<dl><dt><code>set tdesc filename </code><var>path</var><dd>Read the target description from <var>path</var>.
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<p><a name="index-unset-tdesc-filename-3640"></a><br><dt><code>unset tdesc filename</code><dd>Do not read the XML target description from a file. <span class="sc">gdb</span>
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will use the description supplied by the current target.
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<p><a name="index-show-tdesc-filename-3641"></a><br><dt><code>show tdesc filename</code><dd>Show the filename to read for a target description, if any.
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</dl>
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</body></html>
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