85 lines
3.7 KiB
HTML
85 lines
3.7 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>Byte Order - Debugging with GDB</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="Debugging with GDB">
|
|
<meta name="generator" content="makeinfo 4.13">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="Targets.html#Targets" title="Targets">
|
|
<link rel="prev" href="Target-Commands.html#Target-Commands" title="Target Commands">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
Copyright (C) 1988-2019 Free Software Foundation, Inc.
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
|
any later version published by the Free Software Foundation; with the
|
|
Invariant Sections being ``Free Software'' and ``Free Software Needs
|
|
Free Documentation'', with the Front-Cover Texts being ``A GNU Manual,''
|
|
and with the Back-Cover Texts as in (a) below.
|
|
|
|
(a) The FSF's Back-Cover Text is: ``You are free to copy and modify
|
|
this GNU Manual. Buying copies from GNU Press supports the FSF in
|
|
developing GNU and promoting software freedom.''
|
|
-->
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
|
<style type="text/css"><!--
|
|
pre.display { font-family:inherit }
|
|
pre.format { font-family:inherit }
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
|
pre.smallexample { font-size:smaller }
|
|
pre.smalllisp { font-size:smaller }
|
|
span.sc { font-variant:small-caps }
|
|
span.roman { font-family:serif; font-weight:normal; }
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<a name="Byte-Order"></a>
|
|
<p>
|
|
Previous: <a rel="previous" accesskey="p" href="Target-Commands.html#Target-Commands">Target Commands</a>,
|
|
Up: <a rel="up" accesskey="u" href="Targets.html#Targets">Targets</a>
|
|
<hr>
|
|
</div>
|
|
|
|
<h3 class="section">19.3 Choosing Target Byte Order</h3>
|
|
|
|
<p><a name="index-choosing-target-byte-order-1328"></a><a name="index-target-byte-order-1329"></a>
|
|
Some types of processors, such as the <acronym>MIPS</acronym>, PowerPC, and Renesas SH,
|
|
offer the ability to run either big-endian or little-endian byte
|
|
orders. Usually the executable or symbol will include a bit to
|
|
designate the endian-ness, and you will not need to worry about
|
|
which to use. However, you may still find it useful to adjust
|
|
<span class="sc">gdb</span>'s idea of processor endian-ness manually.
|
|
|
|
|
|
<a name="index-set-endian-1330"></a>
|
|
<dl><dt><code>set endian big</code><dd>Instruct <span class="sc">gdb</span> to assume the target is big-endian.
|
|
|
|
<br><dt><code>set endian little</code><dd>Instruct <span class="sc">gdb</span> to assume the target is little-endian.
|
|
|
|
<br><dt><code>set endian auto</code><dd>Instruct <span class="sc">gdb</span> to use the byte order associated with the
|
|
executable.
|
|
|
|
<br><dt><code>show endian</code><dd>Display <span class="sc">gdb</span>'s current idea of the target byte order.
|
|
|
|
</dl>
|
|
|
|
<p>If the <code>set endian auto</code> mode is in effect and no executable has
|
|
been selected, then the endianness used is the last one chosen either
|
|
by one of the <code>set endian big</code> and <code>set endian little</code>
|
|
commands or by inferring from the last executable used. If no
|
|
endianness has been previously chosen, then the default for this mode
|
|
is inferred from the target <span class="sc">gdb</span> has been built for, and is
|
|
<code>little</code> if the name of the target CPU has an <code>el</code> suffix
|
|
and <code>big</code> otherwise.
|
|
|
|
<p>Note that these commands merely adjust interpretation of symbolic
|
|
data on the host, and that they have absolutely no effect on the
|
|
target system.
|
|
|
|
</body></html>
|
|
|