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109 lines
5.3 KiB
HTML
109 lines
5.3 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>Expressions (LD)</title>
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<meta name="description" content="Expressions (LD)">
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<meta name="keywords" content="Expressions (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="Constants.html#Constants" rel="next" title="Constants">
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<link href="VERSION.html#VERSION" rel="prev" title="VERSION">
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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="Expressions"></a>
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<div class="header">
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<p>
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Next: <a href="Implicit-Linker-Scripts.html#Implicit-Linker-Scripts" accesskey="n" rel="next">Implicit Linker Scripts</a>, Previous: <a href="VERSION.html#VERSION" accesskey="p" rel="prev">VERSION</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="Expressions-in-Linker-Scripts"></a>
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<h3 class="section">3.10 Expressions in Linker Scripts</h3>
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<a name="index-expressions"></a>
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<a name="index-arithmetic"></a>
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<p>The syntax for expressions in the linker script language is identical to
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that of C expressions. All expressions are evaluated as integers. All
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expressions are evaluated in the same size, which is 32 bits if both the
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host and target are 32 bits, and is otherwise 64 bits.
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</p>
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<p>You can use and set symbol values in expressions.
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</p>
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<p>The linker defines several special purpose builtin functions for use in
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expressions.
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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="Constants.html#Constants" accesskey="1">Constants</a>:</td><td> </td><td align="left" valign="top">Constants
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Symbolic-Constants.html#Symbolic-Constants" accesskey="2">Symbolic Constants</a>:</td><td> </td><td align="left" valign="top">Symbolic constants
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Symbols.html#Symbols" accesskey="3">Symbols</a>:</td><td> </td><td align="left" valign="top">Symbol Names
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Orphan-Sections.html#Orphan-Sections" accesskey="4">Orphan Sections</a>:</td><td> </td><td align="left" valign="top">Orphan Sections
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Location-Counter.html#Location-Counter" accesskey="5">Location Counter</a>:</td><td> </td><td align="left" valign="top">The Location Counter
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Operators.html#Operators" accesskey="6">Operators</a>:</td><td> </td><td align="left" valign="top">Operators
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Evaluation.html#Evaluation" accesskey="7">Evaluation</a>:</td><td> </td><td align="left" valign="top">Evaluation
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Expression-Section.html#Expression-Section" accesskey="8">Expression Section</a>:</td><td> </td><td align="left" valign="top">The Section of an Expression
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Builtin-Functions.html#Builtin-Functions" accesskey="9">Builtin Functions</a>:</td><td> </td><td align="left" valign="top">Builtin Functions
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</td></tr>
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</table>
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</body>
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</html>
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