arduino-0018-windows
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<html lang="en">
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<head>
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<title>Output Section Fill - Untitled</title>
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<meta name="generator" content="makeinfo 4.7">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Output-Section-Attributes.html#Output-Section-Attributes" title="Output Section Attributes">
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<link rel="prev" href="Output-Section-Phdr.html#Output-Section-Phdr" title="Output Section Phdr">
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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 Binutils)
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version 2.19.
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Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000,
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2001, 2002, 2003, 2004, 2005, 2006, 2007 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 1.1
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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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<style type="text/css"><!--
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--></style>
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</head>
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<body>
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<div class="node">
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<p>
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<a name="Output-Section-Fill"></a>Previous: <a rel="previous" accesskey="p" href="Output-Section-Phdr.html#Output-Section-Phdr">Output Section Phdr</a>,
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Up: <a rel="up" accesskey="u" href="Output-Section-Attributes.html#Output-Section-Attributes">Output Section Attributes</a>
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<hr><br>
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</div>
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<h5 class="subsubsection">3.6.8.7 Output Section Fill</h5>
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<p><a name="index-_003d_0040var_007bfillexp_007d-426"></a><a name="index-section-fill-pattern-427"></a><a name="index-fill-pattern_002c-entire-section-428"></a>You can set the fill pattern for an entire section by using
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<span class="samp">=</span><var>fillexp</var>. <var>fillexp</var> is an expression
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(see <a href="Expressions.html#Expressions">Expressions</a>). Any otherwise unspecified regions of memory
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within the output section (for example, gaps left due to the required
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alignment of input sections) will be filled with the value, repeated as
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necessary. If the fill expression is a simple hex number, ie. a string
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of hex digit starting with <span class="samp">0x</span> and without a trailing <span class="samp">k</span> or <span class="samp">M</span>, then
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an arbitrarily long sequence of hex digits can be used to specify the
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fill pattern; Leading zeros become part of the pattern too. For all
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other cases, including extra parentheses or a unary <code>+</code>, the fill
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pattern is the four least significant bytes of the value of the
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expression. In all cases, the number is big-endian.
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<p>You can also change the fill value with a <code>FILL</code> command in the
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output section commands; (see <a href="Output-Section-Data.html#Output-Section-Data">Output Section Data</a>).
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<p>Here is a simple example:
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<pre class="smallexample"> SECTIONS { .text : { *(.text) } =0x90909090 }
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</pre>
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</body></html>
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