77 lines
3.7 KiB
HTML
77 lines
3.7 KiB
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<title>Constants - Untitled</title>
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<link rel="up" href="Expressions.html#Expressions" title="Expressions">
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<link rel="next" href="Symbolic-Constants.html#Symbolic-Constants" title="Symbolic Constants">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU linker LD
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(GNU Toolchain for the A-profile Architecture 9.2-2019.12 (arm-9.10))
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version 2.33.1.
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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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<div class="node">
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<a name="Constants"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Symbolic-Constants.html#Symbolic-Constants">Symbolic Constants</a>,
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Up: <a rel="up" accesskey="u" href="Expressions.html#Expressions">Expressions</a>
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<hr>
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</div>
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<h4 class="subsection">3.10.1 Constants</h4>
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<p><a name="index-integer-notation-551"></a><a name="index-constants-in-linker-scripts-552"></a>All constants are integers.
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<p>As in C, the linker considers an integer beginning with ‘<samp><span class="samp">0</span></samp>’ to be
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octal, and an integer beginning with ‘<samp><span class="samp">0x</span></samp>’ or ‘<samp><span class="samp">0X</span></samp>’ to be
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hexadecimal. Alternatively the linker accepts suffixes of ‘<samp><span class="samp">h</span></samp>’ or
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‘<samp><span class="samp">H</span></samp>’ for hexadecimal, ‘<samp><span class="samp">o</span></samp>’ or ‘<samp><span class="samp">O</span></samp>’ for octal, ‘<samp><span class="samp">b</span></samp>’ or
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‘<samp><span class="samp">B</span></samp>’ for binary and ‘<samp><span class="samp">d</span></samp>’ or ‘<samp><span class="samp">D</span></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><a name="index-scaled-integers-553"></a><a name="index-K-and-M-integer-suffixes-554"></a><a name="index-M-and-K-integer-suffixes-555"></a><a name="index-suffixes-for-integers-556"></a><a name="index-integer-suffixes-557"></a>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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<!-- TEXI2ROFF-KILL -->
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<!-- END TEXI2ROFF-KILL -->
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<code>1024</code> or <code>1024*1024</code>
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<!-- TEXI2ROFF-KILL -->
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<!-- END TEXI2ROFF-KILL -->
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respectively. For example, the following
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all refer to the same quantity:
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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>
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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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</body></html>
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