109 lines
4.5 KiB
HTML
109 lines
4.5 KiB
HTML
<!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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(Linaro_Binutils-2017.02)
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version 2.27.0.
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Copyright (C) 1991-2016 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 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>LD: Constants</title>
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<meta name="description" content="LD: Constants">
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<meta name="keywords" content="LD: Constants">
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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="Symbolic-Constants.html#Symbolic-Constants" rel="next" title="Symbolic Constants">
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<link href="Expressions.html#Expressions" rel="prev" title="Expressions">
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</head>
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="Constants"></a>
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<div class="header">
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<p>
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Next: <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>
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</div>
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<hr>
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<a name="Constants-1"></a>
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<h4 class="subsection">3.10.1 Constants</h4>
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<a name="index-integer-notation"></a>
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<a name="index-constants-in-linker-scripts"></a>
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<p>All constants are integers.
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</p>
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<p>As in C, the linker considers an integer beginning with ‘<samp>0</samp>’ to be
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octal, and an integer beginning with ‘<samp>0x</samp>’ or ‘<samp>0X</samp>’ to be
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hexadecimal. Alternatively the linker accepts suffixes of ‘<samp>h</samp>’ or
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‘<samp>H</samp>’ for hexadecimal, ‘<samp>o</samp>’ or ‘<samp>O</samp>’ for octal, ‘<samp>b</samp>’ or
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‘<samp>B</samp>’ for binary and ‘<samp>d</samp>’ or ‘<samp>D</samp>’ for decimal. Any integer
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value without a prefix or a suffix is considered to be decimal.
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</p>
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<a name="index-scaled-integers"></a>
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<a name="index-K-and-M-integer-suffixes"></a>
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<a name="index-M-and-K-integer-suffixes"></a>
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<a name="index-suffixes-for-integers"></a>
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<a name="index-integer-suffixes"></a>
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<p>In addition, you can use the suffixes <code>K</code> and <code>M</code> to scale a
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constant by
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<code>1024</code> or <code>1024*1024</code>
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respectively. For example, the following
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all refer to the same quantity:
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</p>
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<div class="smallexample">
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<pre class="smallexample">_fourk_1 = 4K;
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_fourk_2 = 4096;
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_fourk_3 = 0x1000;
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_fourk_4 = 10000o;
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</pre></div>
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<p>Note - the <code>K</code> and <code>M</code> suffixes cannot be used in
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conjunction with the base suffixes mentioned above.
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</p>
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</body>
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</html>
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