70 lines
3.1 KiB
HTML
70 lines
3.1 KiB
HTML
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<html lang="en">
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<head>
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<title>Sparc-Aligned-Data - Using as</title>
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<meta name="description" content="Using as">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Sparc_002dDependent.html#Sparc_002dDependent" title="Sparc-Dependent">
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<link rel="prev" href="Sparc_002dOpts.html#Sparc_002dOpts" title="Sparc-Opts">
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<link rel="next" href="Sparc_002dSyntax.html#Sparc_002dSyntax" title="Sparc-Syntax">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991-2019 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
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled ``GNU Free Documentation License''.
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--></style>
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</head>
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<body>
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<div class="node">
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<a name="Sparc-Aligned-Data"></a>
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<a name="Sparc_002dAligned_002dData"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Sparc_002dSyntax.html#Sparc_002dSyntax">Sparc-Syntax</a>,
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Previous: <a rel="previous" accesskey="p" href="Sparc_002dOpts.html#Sparc_002dOpts">Sparc-Opts</a>,
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Up: <a rel="up" accesskey="u" href="Sparc_002dDependent.html#Sparc_002dDependent">Sparc-Dependent</a>
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<hr>
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</div>
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<h4 class="subsection">9.44.2 Enforcing aligned data</h4>
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<p><a name="index-data-alignment-on-SPARC-2164"></a><a name="index-SPARC-data-alignment-2165"></a>SPARC GAS normally permits data to be misaligned. For example, it
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permits the <code>.long</code> pseudo-op to be used on a byte boundary.
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However, the native SunOS assemblers issue an error when they see
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misaligned data.
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<p><a name="index-g_t_002d_002denforce_002daligned_002ddata-2166"></a>You can use the <code>--enforce-aligned-data</code> option to make SPARC GAS
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also issue an error about misaligned data, just as the SunOS
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assemblers do.
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<p>The <code>--enforce-aligned-data</code> option is not the default because gcc
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issues misaligned data pseudo-ops when it initializes certain packed
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data structures (structures defined using the <code>packed</code> attribute).
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You may have to assemble with GAS in order to initialize packed data
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structures in your own code.
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<p><a name="index-SPARC-syntax-2167"></a><a name="index-syntax_002c-SPARC-2168"></a>
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</body></html>
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