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Information-provided-by-the-linker.html 4.8KB

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  65. Next: <a href="Relocating-the-section-contents.html#Relocating-the-section-contents" accesskey="n" rel="next">Relocating the section contents</a>, Previous: <a href="Performing-the-Final-Link.html#Performing-the-Final-Link" accesskey="p" rel="prev">Performing the Final Link</a>, Up: <a href="Performing-the-Final-Link.html#Performing-the-Final-Link" accesskey="u" rel="up">Performing the Final Link</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="BFD-Index.html#BFD-Index" title="Index" rel="index">Index</a>]</p>
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  68. <a name="Information-provided-by-the-linker-1"></a>
  69. <h4 class="subsubsection">2.17.3.1 Information provided by the linker</h4>
  70. <p>Before the linker calls the <code>_bfd_final_link</code> entry point,
  71. it sets up some data structures for the function to use.
  72. </p>
  73. <p>The <code>input_bfds</code> field of the <code>bfd_link_info</code> structure
  74. will point to a list of all the input files included in the
  75. link. These files are linked through the <code>link.next</code> field
  76. of the <code>bfd</code> structure.
  77. </p>
  78. <p>Each section in the output file will have a list of
  79. <code>link_order</code> structures attached to the <code>map_head.link_order</code>
  80. field (the <code>link_order</code> structure is defined in
  81. <code>bfdlink.h</code>). These structures describe how to create the
  82. contents of the output section in terms of the contents of
  83. various input sections, fill constants, and, eventually, other
  84. types of information. They also describe relocs that must be
  85. created by the BFD backend, but do not correspond to any input
  86. file; this is used to support -Ur, which builds constructors
  87. while generating a relocatable object file.
  88. </p>
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