1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<!-- This file documents the GNU linker LD 4(GNU Toolchain for the A-profile Architecture 10.3-2021.07 (arm-10.29)) 5version 2.36.1. 6 7Copyright (C) 1991-2021 Free Software Foundation, Inc. 8 9Permission is granted to copy, distribute and/or modify this document 10under the terms of the GNU Free Documentation License, Version 1.3 11or any later version published by the Free Software Foundation; 12with no Invariant Sections, with no Front-Cover Texts, and with no 13Back-Cover Texts. A copy of the license is included in the 14section entitled "GNU Free Documentation License". --> 15<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> 16<head> 17<title>LD: Constants</title> 18 19<meta name="description" content="LD: Constants"> 20<meta name="keywords" content="LD: Constants"> 21<meta name="resource-type" content="document"> 22<meta name="distribution" content="global"> 23<meta name="Generator" content="makeinfo"> 24<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 25<link href="index.html#Top" rel="start" title="Top"> 26<link href="LD-Index.html#LD-Index" rel="index" title="LD Index"> 27<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> 28<link href="Expressions.html#Expressions" rel="up" title="Expressions"> 29<link href="Symbolic-Constants.html#Symbolic-Constants" rel="next" title="Symbolic Constants"> 30<link href="Expressions.html#Expressions" rel="previous" title="Expressions"> 31<style type="text/css"> 32<!-- 33a.summary-letter {text-decoration: none} 34blockquote.smallquotation {font-size: smaller} 35div.display {margin-left: 3.2em} 36div.example {margin-left: 3.2em} 37div.indentedblock {margin-left: 3.2em} 38div.lisp {margin-left: 3.2em} 39div.smalldisplay {margin-left: 3.2em} 40div.smallexample {margin-left: 3.2em} 41div.smallindentedblock {margin-left: 3.2em; font-size: smaller} 42div.smalllisp {margin-left: 3.2em} 43kbd {font-style:oblique} 44pre.display {font-family: inherit} 45pre.format {font-family: inherit} 46pre.menu-comment {font-family: serif} 47pre.menu-preformatted {font-family: serif} 48pre.smalldisplay {font-family: inherit; font-size: smaller} 49pre.smallexample {font-size: smaller} 50pre.smallformat {font-family: inherit; font-size: smaller} 51pre.smalllisp {font-size: smaller} 52span.nocodebreak {white-space:nowrap} 53span.nolinebreak {white-space:nowrap} 54span.roman {font-family:serif; font-weight:normal} 55span.sansserif {font-family:sans-serif; font-weight:normal} 56ul.no-bullet {list-style: none} 57--> 58</style> 59 60 61</head> 62 63<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> 64<a name="Constants"></a> 65<div class="header"> 66<p> 67Next: <a href="Symbolic-Constants.html#Symbolic-Constants" accesskey="n" rel="next">Symbolic Constants</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> 68</div> 69<hr> 70<a name="Constants-1"></a> 71<h4 class="subsection">3.10.1 Constants</h4> 72<a name="index-integer-notation"></a> 73<a name="index-constants-in-linker-scripts"></a> 74<p>All constants are integers. 75</p> 76<p>As in C, the linker considers an integer beginning with ‘<samp>0</samp>’ to be 77octal, and an integer beginning with ‘<samp>0x</samp>’ or ‘<samp>0X</samp>’ to be 78hexadecimal. Alternatively the linker accepts suffixes of ‘<samp>h</samp>’ or 79‘<samp>H</samp>’ for hexadecimal, ‘<samp>o</samp>’ or ‘<samp>O</samp>’ for octal, ‘<samp>b</samp>’ or 80‘<samp>B</samp>’ for binary and ‘<samp>d</samp>’ or ‘<samp>D</samp>’ for decimal. Any integer 81value without a prefix or a suffix is considered to be decimal. 82</p> 83<a name="index-scaled-integers"></a> 84<a name="index-K-and-M-integer-suffixes"></a> 85<a name="index-M-and-K-integer-suffixes"></a> 86<a name="index-suffixes-for-integers"></a> 87<a name="index-integer-suffixes"></a> 88<p>In addition, you can use the suffixes <code>K</code> and <code>M</code> to scale a 89constant by 90<code>1024</code> or <code>1024*1024</code> 91respectively. For example, the following 92all refer to the same quantity: 93</p> 94<div class="smallexample"> 95<pre class="smallexample">_fourk_1 = 4K; 96_fourk_2 = 4096; 97_fourk_3 = 0x1000; 98_fourk_4 = 10000o; 99</pre></div> 100 101<p>Note - the <code>K</code> and <code>M</code> suffixes cannot be used in 102conjunction with the base suffixes mentioned above. 103</p> 104 105 106 107</body> 108</html> 109