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105 lines
4.6 KiB
HTML
105 lines
4.6 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>Orphan Sections (LD)</title>
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<meta name="description" content="Orphan Sections (LD)">
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<meta name="keywords" content="Orphan 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="Expressions.html#Expressions" rel="up" title="Expressions">
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<link href="Location-Counter.html#Location-Counter" rel="next" title="Location Counter">
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<link href="Symbols.html#Symbols" rel="prev" title="Symbols">
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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="Orphan-Sections"></a>
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<div class="header">
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<p>
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Next: <a href="Location-Counter.html#Location-Counter" accesskey="n" rel="next">Location Counter</a>, Previous: <a href="Symbols.html#Symbols" accesskey="p" rel="prev">Symbols</a>, Up: <a href="Expressions.html#Expressions" accesskey="u" rel="up">Expressions</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="Orphan-Sections-1"></a>
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<h4 class="subsection">3.10.4 Orphan Sections</h4>
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<a name="index-orphan"></a>
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<p>Orphan sections are sections present in the input files which
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are not explicitly placed into the output file by the linker
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script. The linker will still copy these sections into the
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output file by either finding, or creating a suitable output section
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in which to place the orphaned input section.
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</p>
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<p>If the name of an orphaned input section exactly matches the name of
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an existing output section, then the orphaned input section will be
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placed at the end of that output section.
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</p>
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<p>If there is no output section with a matching name then new output
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sections will be created. Each new output section will have the same
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name as the orphan section placed within it. If there are multiple
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orphan sections with the same name, these will all be combined into
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one new output section.
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</p>
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<p>If new output sections are created to hold orphaned input sections,
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then the linker must decide where to place these new output sections
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in relation to existing output sections. On most modern targets, the
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linker attempts to place orphan sections after sections of the same
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attribute, such as code vs data, loadable vs non-loadable, etc. If no
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sections with matching attributes are found, or your target lacks this
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support, the orphan section is placed at the end of the file.
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</p>
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<p>The command-line options ‘<samp>--orphan-handling</samp>’ and ‘<samp>--unique</samp>’
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(see <a href="Options.html#Options">Command-line Options</a>) can be used to control which
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output sections an orphan is placed in.
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</p>
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</body>
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</html>
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