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| <a name="SECTIONS"></a> |
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| Next: <a href="MEMORY.html#MEMORY" accesskey="n" rel="next">MEMORY</a>, Previous: <a href="Assignments.html#Assignments" accesskey="p" rel="prev">Assignments</a>, Up: <a href="Scripts.html#Scripts" accesskey="u" rel="up">Scripts</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="SECTIONS-Command"></a> |
| <h3 class="section">3.6 SECTIONS Command</h3> |
| <a name="index-SECTIONS"></a> |
| <p>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> |
| <p>The format of the <code>SECTIONS</code> command is: |
| </p><div class="smallexample"> |
| <pre class="smallexample">SECTIONS |
| { |
| <var>sections-command</var> |
| <var>sections-command</var> |
| … |
| } |
| </pre></div> |
| |
| <p>Each <var>sections-command</var> may of be one of the following: |
| </p> |
| <ul> |
| <li> an <code>ENTRY</code> command (see <a href="Entry-Point.html#Entry-Point">Entry command</a>) |
| </li><li> a symbol assignment (see <a href="Assignments.html#Assignments">Assignments</a>) |
| </li><li> an output section description |
| </li><li> an overlay description |
| </li></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> |
| <p>Output section descriptions and overlay descriptions are described |
| below. |
| </p> |
| <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. |
| </p> |
| <table class="menu" border="0" cellspacing="0"> |
| <tr><td align="left" valign="top">• <a href="Output-Section-Description.html#Output-Section-Description" accesskey="1">Output Section Description</a>:</td><td> </td><td align="left" valign="top">Output section description |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Output-Section-Name.html#Output-Section-Name" accesskey="2">Output Section Name</a>:</td><td> </td><td align="left" valign="top">Output section name |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Output-Section-Address.html#Output-Section-Address" accesskey="3">Output Section Address</a>:</td><td> </td><td align="left" valign="top">Output section address |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Input-Section.html#Input-Section" accesskey="4">Input Section</a>:</td><td> </td><td align="left" valign="top">Input section description |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Output-Section-Data.html#Output-Section-Data" accesskey="5">Output Section Data</a>:</td><td> </td><td align="left" valign="top">Output section data |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Output-Section-Keywords.html#Output-Section-Keywords" accesskey="6">Output Section Keywords</a>:</td><td> </td><td align="left" valign="top">Output section keywords |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Output-Section-Discarding.html#Output-Section-Discarding" accesskey="7">Output Section Discarding</a>:</td><td> </td><td align="left" valign="top">Output section discarding |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Output-Section-Attributes.html#Output-Section-Attributes" accesskey="8">Output Section Attributes</a>:</td><td> </td><td align="left" valign="top">Output section attributes |
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