You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
4.5 KiB
HTML
92 lines
4.5 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>Relocating the section contents - Untitled</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="Untitled">
|
|
<meta name="generator" content="makeinfo 4.13">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="Performing-the-Final-Link.html#Performing-the-Final-Link" title="Performing the Final Link">
|
|
<link rel="prev" href="Information-provided-by-the-linker.html#Information-provided-by-the-linker" title="Information provided by the linker">
|
|
<link rel="next" href="Writing-the-symbol-table.html#Writing-the-symbol-table" title="Writing the symbol table">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
This file documents the BFD library.
|
|
|
|
Copyright (C) 1991-2015 Free Software Foundation, Inc.
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
|
any later version published by the Free Software Foundation; with the
|
|
Invariant Sections being ``GNU General Public License'' and ``Funding
|
|
Free Software'', the Front-Cover texts being (a) (see below), and with
|
|
the Back-Cover Texts being (b) (see below). A copy of the license is
|
|
included in the section entitled ``GNU Free Documentation License''.
|
|
|
|
(a) The FSF's Front-Cover Text is:
|
|
|
|
A GNU Manual
|
|
|
|
(b) The FSF's Back-Cover Text is:
|
|
|
|
You have freedom to copy and modify this GNU Manual, like GNU
|
|
software. Copies published by the Free Software Foundation raise
|
|
funds for GNU development.-->
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
|
<style type="text/css"><!--
|
|
pre.display { font-family:inherit }
|
|
pre.format { font-family:inherit }
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
|
pre.smallexample { font-size:smaller }
|
|
pre.smalllisp { font-size:smaller }
|
|
span.sc { font-variant:small-caps }
|
|
span.roman { font-family:serif; font-weight:normal; }
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<a name="Relocating-the-section-contents"></a>
|
|
<p>
|
|
Next: <a rel="next" accesskey="n" href="Writing-the-symbol-table.html#Writing-the-symbol-table">Writing the symbol table</a>,
|
|
Previous: <a rel="previous" accesskey="p" href="Information-provided-by-the-linker.html#Information-provided-by-the-linker">Information provided by the linker</a>,
|
|
Up: <a rel="up" accesskey="u" href="Performing-the-Final-Link.html#Performing-the-Final-Link">Performing the Final Link</a>
|
|
<hr>
|
|
</div>
|
|
|
|
<h5 class="subsubsection">2.17.3.2 Relocating the section contents</h5>
|
|
|
|
<p>The <code>_bfd_final_link</code> function should look through the
|
|
<code>link_order</code> structures attached to each section of the
|
|
output file. Each <code>link_order</code> structure should either be
|
|
handled specially, or it should be passed to the function
|
|
<code>_bfd_default_link_order</code> which will do the right thing
|
|
(<code>_bfd_default_link_order</code> is defined in <code>linker.c</code>).
|
|
|
|
<p>For efficiency, a <code>link_order</code> of type
|
|
<code>bfd_indirect_link_order</code> whose associated section belongs
|
|
to a BFD of the same format as the output BFD must be handled
|
|
specially. This type of <code>link_order</code> describes part of an
|
|
output section in terms of a section belonging to one of the
|
|
input files. The <code>_bfd_final_link</code> function should read the
|
|
contents of the section and any associated relocs, apply the
|
|
relocs to the section contents, and write out the modified
|
|
section contents. If performing a relocatable link, the
|
|
relocs themselves must also be modified and written out.
|
|
|
|
<p><a name="index-g_t_005fbfd_005frelocate_005fcontents-2348"></a><a name="index-g_t_005fbfd_005ffinal_005flink_005frelocate-2349"></a>The functions <code>_bfd_relocate_contents</code> and
|
|
<code>_bfd_final_link_relocate</code> provide some general support for
|
|
performing the actual relocations, notably overflow checking.
|
|
Their arguments include information about the symbol the
|
|
relocation is against and a <code>reloc_howto_type</code> argument
|
|
which describes the relocation to perform. These functions
|
|
are defined in <code>reloc.c</code>.
|
|
|
|
<p>The a.out function which handles reading, relocating, and
|
|
writing section contents is <code>aout_link_input_section</code>. The
|
|
actual relocation is done in <code>aout_link_input_section_std</code>
|
|
and <code>aout_link_input_section_ext</code>.
|
|
|
|
</body></html>
|
|
|