Output-Section-Description.html 4.6 KB

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  15. <title>LD: Output Section Description</title>
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  25. <link href="SECTIONS.html#SECTIONS" rel="up" title="SECTIONS">
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  58. <a name="Output-Section-Description"></a>
  59. <div class="header">
  60. <p>
  61. Next: <a href="Output-Section-Name.html#Output-Section-Name" accesskey="n" rel="next">Output Section Name</a>, Up: <a href="SECTIONS.html#SECTIONS" accesskey="u" rel="up">SECTIONS</a> &nbsp; [<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>
  62. </div>
  63. <hr>
  64. <a name="Output-Section-Description-1"></a>
  65. <h4 class="subsection">3.6.1 Output Section Description</h4>
  66. <p>The full description of an output section looks like this:
  67. </p><div class="smallexample">
  68. <pre class="smallexample"><var>section</var> [<var>address</var>] [(<var>type</var>)] :
  69. [AT(<var>lma</var>)]
  70. [ALIGN(<var>section_align</var>) | ALIGN_WITH_INPUT]
  71. [SUBALIGN(<var>subsection_align</var>)]
  72. [<var>constraint</var>]
  73. {
  74. <var>output-section-command</var>
  75. <var>output-section-command</var>
  76. &hellip;
  77. } [&gt;<var>region</var>] [AT&gt;<var>lma_region</var>] [:<var>phdr</var> :<var>phdr</var> &hellip;] [=<var>fillexp</var>] [,]
  78. </pre></div>
  79. <p>Most output sections do not use most of the optional section attributes.
  80. </p>
  81. <p>The whitespace around <var>section</var> is required, so that the section
  82. name is unambiguous. The colon and the curly braces are also required.
  83. The comma at the end may be required if a <var>fillexp</var> is used and
  84. the next <var>sections-command</var> looks like a continuation of the expression.
  85. The line breaks and other white space are optional.
  86. </p>
  87. <p>Each <var>output-section-command</var> may be one of the following:
  88. </p>
  89. <ul>
  90. <li> a symbol assignment (see <a href="Assignments.html#Assignments">Assignments</a>)
  91. </li><li> an input section description (see <a href="Input-Section.html#Input-Section">Input Section</a>)
  92. </li><li> data values to include directly (see <a href="Output-Section-Data.html#Output-Section-Data">Output Section Data</a>)
  93. </li><li> a special output section keyword (see <a href="Output-Section-Keywords.html#Output-Section-Keywords">Output Section Keywords</a>)
  94. </li></ul>
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