You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
108 lines
4.4 KiB
HTML
108 lines
4.4 KiB
HTML
4 years ago
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
|
|
<html>
|
||
|
|
<!-- This file documents the GNU linker LD
|
||
|
|
(SiFive Binutils 2.32.0-2020.04.1)
|
||
|
|
version 2.32.
|
||
|
|
|
||
|
|
Copyright (C) 1991-2019 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 1.3
|
||
|
|
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". -->
|
||
|
|
<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
|
||
|
|
<head>
|
||
|
|
<title>Constants (LD)</title>
|
||
|
|
|
||
|
|
<meta name="description" content="Constants (LD)">
|
||
|
|
<meta name="keywords" content="Constants (LD)">
|
||
|
|
<meta name="resource-type" content="document">
|
||
|
|
<meta name="distribution" content="global">
|
||
|
|
<meta name="Generator" content="makeinfo">
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
|
<link href="index.html#Top" rel="start" title="Top">
|
||
|
|
<link href="LD-Index.html#LD-Index" rel="index" title="LD Index">
|
||
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
||
|
|
<link href="Expressions.html#Expressions" rel="up" title="Expressions">
|
||
|
|
<link href="Symbolic-Constants.html#Symbolic-Constants" rel="next" title="Symbolic Constants">
|
||
|
|
<link href="Expressions.html#Expressions" rel="prev" title="Expressions">
|
||
|
|
<style type="text/css">
|
||
|
|
<!--
|
||
|
|
a.summary-letter {text-decoration: none}
|
||
|
|
blockquote.indentedblock {margin-right: 0em}
|
||
|
|
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
|
||
|
|
blockquote.smallquotation {font-size: smaller}
|
||
|
|
div.display {margin-left: 3.2em}
|
||
|
|
div.example {margin-left: 3.2em}
|
||
|
|
div.lisp {margin-left: 3.2em}
|
||
|
|
div.smalldisplay {margin-left: 3.2em}
|
||
|
|
div.smallexample {margin-left: 3.2em}
|
||
|
|
div.smalllisp {margin-left: 3.2em}
|
||
|
|
kbd {font-style: oblique}
|
||
|
|
pre.display {font-family: inherit}
|
||
|
|
pre.format {font-family: inherit}
|
||
|
|
pre.menu-comment {font-family: serif}
|
||
|
|
pre.menu-preformatted {font-family: serif}
|
||
|
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
||
|
|
pre.smallexample {font-size: smaller}
|
||
|
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
||
|
|
pre.smalllisp {font-size: smaller}
|
||
|
|
span.nolinebreak {white-space: nowrap}
|
||
|
|
span.roman {font-family: initial; font-weight: normal}
|
||
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
||
|
|
ul.no-bullet {list-style: none}
|
||
|
|
-->
|
||
|
|
</style>
|
||
|
|
|
||
|
|
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body lang="en">
|
||
|
|
<a name="Constants"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
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>
|
||
|
|
</div>
|
||
|
|
<hr>
|
||
|
|
<a name="Constants-1"></a>
|
||
|
|
<h4 class="subsection">3.10.1 Constants</h4>
|
||
|
|
<a name="index-integer-notation"></a>
|
||
|
|
<a name="index-constants-in-linker-scripts"></a>
|
||
|
|
<p>All constants are integers.
|
||
|
|
</p>
|
||
|
|
<p>As in C, the linker considers an integer beginning with ‘<samp>0</samp>’ to be
|
||
|
|
octal, and an integer beginning with ‘<samp>0x</samp>’ or ‘<samp>0X</samp>’ to be
|
||
|
|
hexadecimal. Alternatively the linker accepts suffixes of ‘<samp>h</samp>’ or
|
||
|
|
‘<samp>H</samp>’ for hexadecimal, ‘<samp>o</samp>’ or ‘<samp>O</samp>’ for octal, ‘<samp>b</samp>’ or
|
||
|
|
‘<samp>B</samp>’ for binary and ‘<samp>d</samp>’ or ‘<samp>D</samp>’ for decimal. Any integer
|
||
|
|
value without a prefix or a suffix is considered to be decimal.
|
||
|
|
</p>
|
||
|
|
<a name="index-scaled-integers"></a>
|
||
|
|
<a name="index-K-and-M-integer-suffixes"></a>
|
||
|
|
<a name="index-M-and-K-integer-suffixes"></a>
|
||
|
|
<a name="index-suffixes-for-integers"></a>
|
||
|
|
<a name="index-integer-suffixes"></a>
|
||
|
|
<p>In addition, you can use the suffixes <code>K</code> and <code>M</code> to scale a
|
||
|
|
constant by
|
||
|
|
<code>1024</code> or <code>1024*1024</code>
|
||
|
|
respectively. For example, the following
|
||
|
|
all refer to the same quantity:
|
||
|
|
</p>
|
||
|
|
<div class="smallexample">
|
||
|
|
<pre class="smallexample">_fourk_1 = 4K;
|
||
|
|
_fourk_2 = 4096;
|
||
|
|
_fourk_3 = 0x1000;
|
||
|
|
_fourk_4 = 10000o;
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
<p>Note - the <code>K</code> and <code>M</code> suffixes cannot be used in
|
||
|
|
conjunction with the base suffixes mentioned above.
|
||
|
|
</p>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|