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141 lines
7.1 KiB
HTML
141 lines
7.1 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- This file documents the GNU linker LD
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(SiFive Binutils 2.32.0-2020.04.1)
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version 2.32.
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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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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>SECTIONS (LD)</title>
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<meta name="description" content="SECTIONS (LD)">
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<meta name="keywords" content="SECTIONS (LD)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="LD-Index.html#LD-Index" rel="index" title="LD Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Scripts.html#Scripts" rel="up" title="Scripts">
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<link href="Output-Section-Description.html#Output-Section-Description" rel="next" title="Output Section Description">
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<link href="Source-Code-Reference.html#Source-Code-Reference" rel="prev" title="Source Code Reference">
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<style type="text/css">
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<!--
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a.summary-letter {text-decoration: none}
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blockquote.indentedblock {margin-right: 0em}
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blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
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blockquote.smallquotation {font-size: smaller}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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div.lisp {margin-left: 3.2em}
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div.smalldisplay {margin-left: 3.2em}
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div.smallexample {margin-left: 3.2em}
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div.smalllisp {margin-left: 3.2em}
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kbd {font-style: oblique}
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pre.display {font-family: inherit}
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pre.format {font-family: inherit}
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pre.menu-comment {font-family: serif}
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pre.menu-preformatted {font-family: serif}
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pre.smalldisplay {font-family: inherit; font-size: smaller}
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pre.smallexample {font-size: smaller}
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pre.smallformat {font-family: inherit; font-size: smaller}
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pre.smalllisp {font-size: smaller}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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span.sansserif {font-family: sans-serif; font-weight: normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="SECTIONS"></a>
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<div class="header">
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<p>
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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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</div>
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<hr>
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<a name="SECTIONS-Command"></a>
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<h3 class="section">3.6 SECTIONS Command</h3>
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<a name="index-SECTIONS"></a>
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<p>The <code>SECTIONS</code> command tells the linker how to map input sections
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into output sections, and how to place the output sections in memory.
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</p>
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<p>The format of the <code>SECTIONS</code> command is:
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</p><div class="smallexample">
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<pre class="smallexample">SECTIONS
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{
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<var>sections-command</var>
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<var>sections-command</var>
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…
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}
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</pre></div>
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<p>Each <var>sections-command</var> may of be one of the following:
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</p>
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<ul>
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<li> an <code>ENTRY</code> command (see <a href="Entry-Point.html#Entry-Point">Entry command</a>)
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</li><li> a symbol assignment (see <a href="Assignments.html#Assignments">Assignments</a>)
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</li><li> an output section description
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</li><li> an overlay description
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</li></ul>
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<p>The <code>ENTRY</code> command and symbol assignments are permitted inside the
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<code>SECTIONS</code> command for convenience in using the location counter in
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those commands. This can also make the linker script easier to
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understand because you can use those commands at meaningful points in
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the layout of the output file.
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</p>
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<p>Output section descriptions and overlay descriptions are described
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below.
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</p>
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<p>If you do not use a <code>SECTIONS</code> command in your linker script, the
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linker will place each input section into an identically named output
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section in the order that the sections are first encountered in the
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input files. If all input sections are present in the first file, for
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example, the order of sections in the output file will match the order
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in the first input file. The first section will be at address zero.
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</p>
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<table class="menu" border="0" cellspacing="0">
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<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
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</td></tr>
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<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
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</td></tr>
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<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
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</td></tr>
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<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
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</td></tr>
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<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
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</td></tr>
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<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
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</td></tr>
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<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
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</td></tr>
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<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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</td></tr>
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<tr><td align="left" valign="top">• <a href="Overlay-Description.html#Overlay-Description" accesskey="9">Overlay Description</a>:</td><td> </td><td align="left" valign="top">Overlay description
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</td></tr>
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</table>
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<hr>
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<div class="header">
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<p>
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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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</div>
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</body>
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</html>
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