85 lines
3.7 KiB
HTML
85 lines
3.7 KiB
HTML
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<html lang="en">
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<head>
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<title>Byte Order - 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="Targets.html#Targets" title="Targets">
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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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<body>
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<div class="node">
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<a name="Byte-Order"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="Target-Commands.html#Target-Commands">Target Commands</a>,
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Up: <a rel="up" accesskey="u" href="Targets.html#Targets">Targets</a>
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<hr>
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</div>
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<h3 class="section">19.3 Choosing Target Byte Order</h3>
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<p><a name="index-choosing-target-byte-order-1328"></a><a name="index-target-byte-order-1329"></a>
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Some types of processors, such as the <acronym>MIPS</acronym>, PowerPC, and Renesas SH,
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offer the ability to run either big-endian or little-endian byte
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orders. Usually the executable or symbol will include a bit to
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designate the endian-ness, and you will not need to worry about
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which to use. However, you may still find it useful to adjust
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<span class="sc">gdb</span>'s idea of processor endian-ness manually.
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<a name="index-set-endian-1330"></a>
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<dl><dt><code>set endian big</code><dd>Instruct <span class="sc">gdb</span> to assume the target is big-endian.
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<br><dt><code>set endian little</code><dd>Instruct <span class="sc">gdb</span> to assume the target is little-endian.
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<br><dt><code>set endian auto</code><dd>Instruct <span class="sc">gdb</span> to use the byte order associated with the
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executable.
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<br><dt><code>show endian</code><dd>Display <span class="sc">gdb</span>'s current idea of the target byte order.
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</dl>
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<p>If the <code>set endian auto</code> mode is in effect and no executable has
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been selected, then the endianness used is the last one chosen either
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by one of the <code>set endian big</code> and <code>set endian little</code>
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commands or by inferring from the last executable used. If no
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endianness has been previously chosen, then the default for this mode
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is inferred from the target <span class="sc">gdb</span> has been built for, and is
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<code>little</code> if the name of the target CPU has an <code>el</code> suffix
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and <code>big</code> otherwise.
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<p>Note that these commands merely adjust interpretation of symbolic
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data on the host, and that they have absolutely no effect on the
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target system.
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</body></html>
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