1<html lang="en"> 2<head> 3<title>Output Section Type - Untitled</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Untitled"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="Output-Section-Attributes.html#Output-Section-Attributes" title="Output Section Attributes"> 9<link rel="next" href="Output-Section-LMA.html#Output-Section-LMA" title="Output Section LMA"> 10<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 11<!-- 12This file documents the GNU linker LD 13(Sourcery CodeBench Lite 2011.09-69) 14version 2.21.53. 15 16Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 172001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. 18 19Permission is granted to copy, distribute and/or modify this document 20under the terms of the GNU Free Documentation License, Version 1.3 21or any later version published by the Free Software Foundation; 22with no Invariant Sections, with no Front-Cover Texts, and with no 23Back-Cover Texts. A copy of the license is included in the 24section entitled ``GNU Free Documentation License''.--> 25<meta http-equiv="Content-Style-Type" content="text/css"> 26<style type="text/css"><!-- 27 pre.display { font-family:inherit } 28 pre.format { font-family:inherit } 29 pre.smalldisplay { font-family:inherit; font-size:smaller } 30 pre.smallformat { font-family:inherit; font-size:smaller } 31 pre.smallexample { font-size:smaller } 32 pre.smalllisp { font-size:smaller } 33 span.sc { font-variant:small-caps } 34 span.roman { font-family:serif; font-weight:normal; } 35 span.sansserif { font-family:sans-serif; font-weight:normal; } 36--></style> 37<link rel="stylesheet" type="text/css" href="../cs.css"> 38</head> 39<body> 40<div class="node"> 41<a name="Output-Section-Type"></a> 42<p> 43Next: <a rel="next" accesskey="n" href="Output-Section-LMA.html#Output-Section-LMA">Output Section LMA</a>, 44Up: <a rel="up" accesskey="u" href="Output-Section-Attributes.html#Output-Section-Attributes">Output Section Attributes</a> 45<hr> 46</div> 47 48<h5 class="subsubsection">3.6.8.1 Output Section Type</h5> 49 50<p>Each output section may have a type. The type is a keyword in 51parentheses. The following types are defined: 52 53 <dl> 54<dt><code>NOLOAD</code><dd>The section should be marked as not loadable, so that it will not be 55loaded into memory when the program is run. 56<br><dt><code>DSECT</code><dt><code>COPY</code><dt><code>INFO</code><dt><code>OVERLAY</code><dd>These type names are supported for backward compatibility, and are 57rarely used. They all have the same effect: the section should be 58marked as not allocatable, so that no memory is allocated for the 59section when the program is run. 60</dl> 61 62 <p><a name="index-NOLOAD-445"></a><a name="index-prevent-unnecessary-loading-446"></a><a name="index-loading_002c-preventing-447"></a>The linker normally sets the attributes of an output section based on 63the input sections which map into it. You can override this by using 64the section type. For example, in the script sample below, the 65‘<samp><span class="samp">ROM</span></samp>’ section is addressed at memory location ‘<samp><span class="samp">0</span></samp>’ and does not 66need to be loaded when the program is run. 67<pre class="smallexample"> SECTIONS { 68 ROM 0 (NOLOAD) : { ... } 69 ... 70 } 71</pre> 72 </body></html> 73 74