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| <title>Using as: Sparc-Aligned-Data</title> |
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| <a name="Enforcing-aligned-data"></a> |
| <h4 class="subsection">9.42.2 Enforcing aligned data</h4> |
| |
| <a name="index-data-alignment-on-SPARC"></a> |
| <a name="index-SPARC-data-alignment"></a> |
| <p>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-_002d_002denforce_002daligned_002ddata"></a> |
| <p>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> |
| <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. |
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