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| <h3 class="section">3.6 SECTIONS Command</h3> |
| |
| <p><a name="index-SECTIONS-450"></a>The <code>SECTIONS</code> command tells the linker how to map input sections |
| into output sections, and how to place the output sections in memory. |
| |
| <p>The format of the <code>SECTIONS</code> command is: |
| <pre class="smallexample"> SECTIONS |
| { |
| <var>sections-command</var> |
| <var>sections-command</var> |
| ... |
| } |
| </pre> |
| <p>Each <var>sections-command</var> may of be one of the following: |
| |
| <ul> |
| <li>an <code>ENTRY</code> command (see <a href="Entry-Point.html#Entry-Point">Entry command</a>) |
| <li>a symbol assignment (see <a href="Assignments.html#Assignments">Assignments</a>) |
| <li>an output section description |
| <li>an overlay description |
| </ul> |
| |
| <p>The <code>ENTRY</code> command and symbol assignments are permitted inside the |
| <code>SECTIONS</code> command for convenience in using the location counter in |
| those commands. This can also make the linker script easier to |
| understand because you can use those commands at meaningful points in |
| the layout of the output file. |
| |
| <p>Output section descriptions and overlay descriptions are described |
| below. |
| |
| <p>If you do not use a <code>SECTIONS</code> command in your linker script, the |
| linker will place each input section into an identically named output |
| section in the order that the sections are first encountered in the |
| input files. If all input sections are present in the first file, for |
| example, the order of sections in the output file will match the order |
| in the first input file. The first section will be at address zero. |
| |
| <ul class="menu"> |
| <li><a accesskey="1" href="Output-Section-Description.html#Output-Section-Description">Output Section Description</a>: Output section description |
| <li><a accesskey="2" href="Output-Section-Name.html#Output-Section-Name">Output Section Name</a>: Output section name |
| <li><a accesskey="3" href="Output-Section-Address.html#Output-Section-Address">Output Section Address</a>: Output section address |
| <li><a accesskey="4" href="Input-Section.html#Input-Section">Input Section</a>: Input section description |
| <li><a accesskey="5" href="Output-Section-Data.html#Output-Section-Data">Output Section Data</a>: Output section data |
| <li><a accesskey="6" href="Output-Section-Keywords.html#Output-Section-Keywords">Output Section Keywords</a>: Output section keywords |
| <li><a accesskey="7" href="Output-Section-Discarding.html#Output-Section-Discarding">Output Section Discarding</a>: Output section discarding |
| <li><a accesskey="8" href="Output-Section-Attributes.html#Output-Section-Attributes">Output Section Attributes</a>: Output section attributes |
| <li><a accesskey="9" href="Overlay-Description.html#Overlay-Description">Overlay Description</a>: Overlay description |
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