<html lang="en"> <head> <title>Expressions - Untitled</title> <meta http-equiv="Content-Type" content="text/html"> <meta name="description" content="Untitled"> <meta name="generator" content="makeinfo 4.7"> <link title="Top" rel="start" href="index.html#Top"> <link rel="up" href="Scripts.html#Scripts" title="Scripts"> <link rel="prev" href="VERSION.html#VERSION" title="VERSION"> <link rel="next" href="Implicit-Linker-Scripts.html#Implicit-Linker-Scripts" title="Implicit Linker Scripts"> <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> <!-- This file documents the GNU linker LD (GNU Binutils) version 2.19. Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled ``GNU Free Documentation License''.--> <meta http-equiv="Content-Style-Type" content="text/css"> <style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller } span.sc { font-variant:small-caps } span.roman { font-family: serif; font-weight: normal; } --></style> </head> <body> <div class="node"> <p> <a name="Expressions"></a>Next: <a rel="next" accesskey="n" href="Implicit-Linker-Scripts.html#Implicit-Linker-Scripts">Implicit Linker Scripts</a>, Previous: <a rel="previous" accesskey="p" href="VERSION.html#VERSION">VERSION</a>, Up: <a rel="up" accesskey="u" href="Scripts.html#Scripts">Scripts</a> <hr><br> </div> <h3 class="section">3.10 Expressions in Linker Scripts</h3> <p><a name="index-expressions-454"></a><a name="index-arithmetic-455"></a>The syntax for expressions in the linker script language is identical to that of C expressions. All expressions are evaluated as integers. All expressions are evaluated in the same size, which is 32 bits if both the host and target are 32 bits, and is otherwise 64 bits. <p>You can use and set symbol values in expressions. <p>The linker defines several special purpose builtin functions for use in expressions. <ul class="menu"> <li><a accesskey="1" href="Constants.html#Constants">Constants</a>: Constants <li><a accesskey="2" href="Symbols.html#Symbols">Symbols</a>: Symbol Names <li><a accesskey="3" href="Orphan-Sections.html#Orphan-Sections">Orphan Sections</a>: Orphan Sections <li><a accesskey="4" href="Location-Counter.html#Location-Counter">Location Counter</a>: The Location Counter <li><a accesskey="5" href="Operators.html#Operators">Operators</a>: Operators <li><a accesskey="6" href="Evaluation.html#Evaluation">Evaluation</a>: Evaluation <li><a accesskey="7" href="Expression-Section.html#Expression-Section">Expression Section</a>: The Section of an Expression <li><a accesskey="8" href="Builtin-Functions.html#Builtin-Functions">Builtin Functions</a>: Builtin Functions </ul> </body></html>