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| <title>LD: Output Section Type</title> |
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| Next: <a href="Output-Section-LMA.html#Output-Section-LMA" accesskey="n" rel="next">Output Section LMA</a>, Up: <a href="Output-Section-Attributes.html#Output-Section-Attributes" accesskey="u" rel="up">Output Section Attributes</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="LD-Index.html#LD-Index" title="Index" rel="index">Index</a>]</p> |
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| <a name="Output-Section-Type-1"></a> |
| <h4 class="subsubsection">3.6.8.1 Output Section Type</h4> |
| <p>Each output section may have a type. The type is a keyword in |
| parentheses. The following types are defined: |
| </p> |
| <dl compact="compact"> |
| <dt><code>NOLOAD</code></dt> |
| <dd><p>The section should be marked as not loadable, so that it will not be |
| loaded into memory when the program is run. |
| </p></dd> |
| <dt><code>DSECT</code></dt> |
| <dt><code>COPY</code></dt> |
| <dt><code>INFO</code></dt> |
| <dt><code>OVERLAY</code></dt> |
| <dd><p>These type names are supported for backward compatibility, and are |
| rarely used. They all have the same effect: the section should be |
| marked as not allocatable, so that no memory is allocated for the |
| section when the program is run. |
| </p></dd> |
| </dl> |
| |
| <a name="index-NOLOAD"></a> |
| <a name="index-prevent-unnecessary-loading"></a> |
| <a name="index-loading_002c-preventing"></a> |
| <p>The linker normally sets the attributes of an output section based on |
| the input sections which map into it. You can override this by using |
| the section type. For example, in the script sample below, the |
| ‘<samp>ROM</samp>’ section is addressed at memory location ‘<samp>0</samp>’ and does not |
| need to be loaded when the program is run. |
| </p><div class="smallexample"> |
| <pre class="smallexample">SECTIONS { |
| ROM 0 (NOLOAD) : { … } |
| … |
| } |
| </pre></div> |
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