You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
3.1 KiB
HTML
70 lines
3.1 KiB
HTML
4 years ago
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>Sparc-Aligned-Data - Using as</title>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html">
|
||
|
|
<meta name="description" content="Using as">
|
||
|
|
<meta name="generator" content="makeinfo 4.13">
|
||
|
|
<link title="Top" rel="start" href="index.html#Top">
|
||
|
|
<link rel="up" href="Sparc_002dDependent.html#Sparc_002dDependent" title="Sparc-Dependent">
|
||
|
|
<link rel="prev" href="Sparc_002dOpts.html#Sparc_002dOpts" title="Sparc-Opts">
|
||
|
|
<link rel="next" href="Sparc_002dSyntax.html#Sparc_002dSyntax" title="Sparc-Syntax">
|
||
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
||
|
|
<!--
|
||
|
|
This file documents the GNU Assembler "as".
|
||
|
|
|
||
|
|
Copyright (C) 1991-2015 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 no Invariant Sections, with no Front-Cover Texts, and with no
|
||
|
|
Back-Cover Texts. A copy of the license is included in the
|
||
|
|
section entitled ``GNU Free Documentation License''.
|
||
|
|
|
||
|
|
-->
|
||
|
|
<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="Sparc-Aligned-Data"></a>
|
||
|
|
<a name="Sparc_002dAligned_002dData"></a>
|
||
|
|
<p>
|
||
|
|
Next: <a rel="next" accesskey="n" href="Sparc_002dSyntax.html#Sparc_002dSyntax">Sparc-Syntax</a>,
|
||
|
|
Previous: <a rel="previous" accesskey="p" href="Sparc_002dOpts.html#Sparc_002dOpts">Sparc-Opts</a>,
|
||
|
|
Up: <a rel="up" accesskey="u" href="Sparc_002dDependent.html#Sparc_002dDependent">Sparc-Dependent</a>
|
||
|
|
<hr>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h4 class="subsection">9.42.2 Enforcing aligned data</h4>
|
||
|
|
|
||
|
|
<p><a name="index-data-alignment-on-SPARC-2012"></a><a name="index-SPARC-data-alignment-2013"></a>SPARC GAS normally permits data to be misaligned. For example, it
|
||
|
|
permits the <code>.long</code> pseudo-op to be used on a byte boundary.
|
||
|
|
However, the native SunOS assemblers issue an error when they see
|
||
|
|
misaligned data.
|
||
|
|
|
||
|
|
<p><a name="index-g_t_002d_002denforce_002daligned_002ddata-2014"></a>You can use the <code>--enforce-aligned-data</code> option to make SPARC GAS
|
||
|
|
also issue an error about misaligned data, just as the SunOS
|
||
|
|
assemblers do.
|
||
|
|
|
||
|
|
<p>The <code>--enforce-aligned-data</code> option is not the default because gcc
|
||
|
|
issues misaligned data pseudo-ops when it initializes certain packed
|
||
|
|
data structures (structures defined using the <code>packed</code> attribute).
|
||
|
|
You may have to assemble with GAS in order to initialize packed data
|
||
|
|
structures in your own code.
|
||
|
|
|
||
|
|
<p><a name="index-SPARC-syntax-2015"></a><a name="index-syntax_002c-SPARC-2016"></a>
|
||
|
|
|
||
|
|
</body></html>
|
||
|
|
|