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111 lines
4.5 KiB
HTML
111 lines
4.5 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 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 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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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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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>AArch64 (Debugging with GDB)</title>
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<meta name="description" content="AArch64 (Debugging with GDB)">
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<meta name="keywords" content="AArch64 (Debugging with GDB)">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Architectures.html#Architectures" rel="up" title="Architectures">
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<link href="i386.html#i386" rel="next" title="i386">
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<link href="Architectures.html#Architectures" rel="prev" title="Architectures">
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</style>
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</head>
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<body lang="en">
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<a name="AArch64"></a>
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<div class="header">
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<p>
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Next: <a href="i386.html#i386" accesskey="n" rel="next">i386</a>, Up: <a href="Architectures.html#Architectures" accesskey="u" rel="up">Architectures</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="AArch64-1"></a>
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<h4 class="subsection">21.4.1 AArch64</h4>
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<a name="index-AArch64-support"></a>
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<p>When <small>GDB</small> is debugging the AArch64 architecture, it provides the
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following special commands:
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</p>
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<dl compact="compact">
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<dt><code>set debug aarch64</code></dt>
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<dd><a name="index-set-debug-aarch64"></a>
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<p>This command determines whether AArch64 architecture-specific debugging
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messages are to be displayed.
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</p>
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</dd>
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<dt><code>show debug aarch64</code></dt>
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<dd><p>Show whether AArch64 debugging messages are displayed.
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</p>
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</dd>
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</dl>
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<a name="AArch64-SVE_002e"></a>
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<h4 class="subsubsection">21.4.1.1 AArch64 SVE.</h4>
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<a name="index-AArch64-SVE_002e"></a>
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<p>When <small>GDB</small> is debugging the AArch64 architecture, if the Scalable Vector
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Extension (SVE) is present, then <small>GDB</small> will provide the vector registers
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<code>$z0</code> through <code>$z31</code>, vector predicate registers <code>$p0</code> through
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<code>$p15</code>, and the <code>$ffr</code> register. In addition, the pseudo register
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<code>$vg</code> will be provided. This is the vector granule for the current thread
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and represents the number of 64-bit chunks in an SVE <code>z</code> register.
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</p>
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<p>If the vector length changes, then the <code>$vg</code> register will be updated,
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but the lengths of the <code>z</code> and <code>p</code> registers will not change. This
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is a known limitation of <small>GDB</small> and does not affect the execution of the
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target process.
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</p>
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</body>
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</html>
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