You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

Input-Section-Example.html 4.7KB

3 vuotta sitten
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113
  1. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
  2. <html>
  3. <!-- This file documents the GNU linker LD
  4. (GNU Arm Embedded Toolchain 10-2020-q4-major)
  5. version 2.35.1.
  6. Copyright (C) 1991-2020 Free Software Foundation, Inc.
  7. Permission is granted to copy, distribute and/or modify this document
  8. under the terms of the GNU Free Documentation License, Version 1.3
  9. or any later version published by the Free Software Foundation;
  10. with no Invariant Sections, with no Front-Cover Texts, and with no
  11. Back-Cover Texts. A copy of the license is included in the
  12. section entitled "GNU Free Documentation License". -->
  13. <!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
  14. <head>
  15. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  16. <title>Input Section Example (LD)</title>
  17. <meta name="description" content="Input Section Example (LD)">
  18. <meta name="keywords" content="Input Section Example (LD)">
  19. <meta name="resource-type" content="document">
  20. <meta name="distribution" content="global">
  21. <meta name="Generator" content="makeinfo">
  22. <link href="index.html#Top" rel="start" title="Top">
  23. <link href="LD-Index.html#LD-Index" rel="index" title="LD Index">
  24. <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
  25. <link href="Input-Section.html#Input-Section" rel="up" title="Input Section">
  26. <link href="Output-Section-Data.html#Output-Section-Data" rel="next" title="Output Section Data">
  27. <link href="Input-Section-Keep.html#Input-Section-Keep" rel="prev" title="Input Section Keep">
  28. <style type="text/css">
  29. <!--
  30. a.summary-letter {text-decoration: none}
  31. blockquote.indentedblock {margin-right: 0em}
  32. blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
  33. blockquote.smallquotation {font-size: smaller}
  34. div.display {margin-left: 3.2em}
  35. div.example {margin-left: 3.2em}
  36. div.lisp {margin-left: 3.2em}
  37. div.smalldisplay {margin-left: 3.2em}
  38. div.smallexample {margin-left: 3.2em}
  39. div.smalllisp {margin-left: 3.2em}
  40. kbd {font-style: oblique}
  41. pre.display {font-family: inherit}
  42. pre.format {font-family: inherit}
  43. pre.menu-comment {font-family: serif}
  44. pre.menu-preformatted {font-family: serif}
  45. pre.smalldisplay {font-family: inherit; font-size: smaller}
  46. pre.smallexample {font-size: smaller}
  47. pre.smallformat {font-family: inherit; font-size: smaller}
  48. pre.smalllisp {font-size: smaller}
  49. span.nolinebreak {white-space: nowrap}
  50. span.roman {font-family: initial; font-weight: normal}
  51. span.sansserif {font-family: sans-serif; font-weight: normal}
  52. ul.no-bullet {list-style: none}
  53. -->
  54. </style>
  55. </head>
  56. <body lang="en">
  57. <a name="Input-Section-Example"></a>
  58. <div class="header">
  59. <p>
  60. Previous: <a href="Input-Section-Keep.html#Input-Section-Keep" accesskey="p" rel="prev">Input Section Keep</a>, Up: <a href="Input-Section.html#Input-Section" accesskey="u" rel="up">Input Section</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>
  61. </div>
  62. <hr>
  63. <a name="Input-Section-Example-1"></a>
  64. <h4 class="subsubsection">3.6.4.5 Input Section Example</h4>
  65. <p>The following example is a complete linker script. It tells the linker
  66. to read all of the sections from file <samp>all.o</samp> and place them at the
  67. start of output section &lsquo;<samp>outputa</samp>&rsquo; which starts at location
  68. &lsquo;<samp>0x10000</samp>&rsquo;. All of section &lsquo;<samp>.input1</samp>&rsquo; from file <samp>foo.o</samp>
  69. follows immediately, in the same output section. All of section
  70. &lsquo;<samp>.input2</samp>&rsquo; from <samp>foo.o</samp> goes into output section
  71. &lsquo;<samp>outputb</samp>&rsquo;, followed by section &lsquo;<samp>.input1</samp>&rsquo; from <samp>foo1.o</samp>.
  72. All of the remaining &lsquo;<samp>.input1</samp>&rsquo; and &lsquo;<samp>.input2</samp>&rsquo; sections from any
  73. files are written to output section &lsquo;<samp>outputc</samp>&rsquo;.
  74. </p>
  75. <div class="smallexample">
  76. <pre class="smallexample">SECTIONS {
  77. outputa 0x10000 :
  78. {
  79. all.o
  80. foo.o (.input1)
  81. }
  82. </pre><pre class="smallexample"> outputb :
  83. {
  84. foo.o (.input2)
  85. foo1.o (.input1)
  86. }
  87. </pre><pre class="smallexample"> outputc :
  88. {
  89. *(.input1)
  90. *(.input2)
  91. }
  92. }
  93. </pre></div>
  94. <p>If an output section&rsquo;s name is the same as the input section&rsquo;s name
  95. and is representable as a C identifier, then the linker will
  96. automatically see <a href="PROVIDE.html#PROVIDE">PROVIDE</a> two symbols: __start_SECNAME and
  97. __stop_SECNAME, where SECNAME is the name of the section. These
  98. indicate the start address and end address of the output section
  99. respectively. Note: most section names are not representable as
  100. C identifiers because they contain a &lsquo;<samp>.</samp>&rsquo; character.
  101. </p>
  102. </body>
  103. </html>