78 lines
3.3 KiB
HTML
78 lines
3.3 KiB
HTML
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>AArch64 - 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="Architectures.html#Architectures" title="Architectures">
|
||
|
|
<link rel="next" href="i386.html#i386" title="i386">
|
||
|
|
<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="AArch64"></a>
|
||
|
|
<p>
|
||
|
|
Next: <a rel="next" accesskey="n" href="i386.html#i386">i386</a>,
|
||
|
|
Up: <a rel="up" accesskey="u" href="Architectures.html#Architectures">Architectures</a>
|
||
|
|
<hr>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h4 class="subsection">21.4.1 AArch64</h4>
|
||
|
|
|
||
|
|
<p><a name="index-AArch64-support-1603"></a>
|
||
|
|
When <span class="sc">gdb</span> is debugging the AArch64 architecture, it provides the
|
||
|
|
following special commands:
|
||
|
|
|
||
|
|
<dl>
|
||
|
|
<dt><code>set debug aarch64</code><dd><a name="index-set-debug-aarch64-1604"></a>This command determines whether AArch64 architecture-specific debugging
|
||
|
|
messages are to be displayed.
|
||
|
|
|
||
|
|
<br><dt><code>show debug aarch64</code><dd>Show whether AArch64 debugging messages are displayed.
|
||
|
|
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<h5 class="subsubsection">21.4.1.1 AArch64 SVE.</h5>
|
||
|
|
|
||
|
|
<p><a name="index-AArch64-SVE_002e-1605"></a>
|
||
|
|
When <span class="sc">gdb</span> is debugging the AArch64 architecture, if the Scalable Vector
|
||
|
|
Extension (SVE) is present, then <span class="sc">gdb</span> will provide the vector registers
|
||
|
|
<code>$z0</code> through <code>$z31</code>, vector predicate registers <code>$p0</code> through
|
||
|
|
<code>$p15</code>, and the <code>$ffr</code> register. In addition, the pseudo register
|
||
|
|
<code>$vg</code> will be provided. This is the vector granule for the current thread
|
||
|
|
and represents the number of 64-bit chunks in an SVE <code>z</code> register.
|
||
|
|
|
||
|
|
<p>If the vector length changes, then the <code>$vg</code> register will be updated,
|
||
|
|
but the lengths of the <code>z</code> and <code>p</code> registers will not change. This
|
||
|
|
is a known limitation of <span class="sc">gdb</span> and does not affect the execution of the
|
||
|
|
target process.
|
||
|
|
|
||
|
|
</body></html>
|
||
|
|
|