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111 lines
4.9 KiB
HTML
111 lines
4.9 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- This file documents the BFD library.
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Copyright (C) 1991-2019 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 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "GNU General Public License" and "Funding
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Free Software", the Front-Cover texts being (a) (see below), and with
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the Back-Cover Texts being (b) (see below). A copy of the license is
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included in the section entitled "GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>What BFD Version 2 Can Do (Untitled Document)</title>
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<meta name="description" content="What BFD Version 2 Can Do (Untitled Document)">
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<meta name="keywords" content="What BFD Version 2 Can Do (Untitled Document)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="BFD-Index.html#BFD-Index" rel="index" title="BFD Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Overview.html#Overview" rel="up" title="Overview">
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<link href="BFD-information-loss.html#BFD-information-loss" rel="next" title="BFD information loss">
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<link href="How-It-Works.html#How-It-Works" rel="prev" title="How It Works">
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</style>
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</head>
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<body lang="en">
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<a name="What-BFD-Version-2-Can-Do"></a>
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<div class="header">
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<p>
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Previous: <a href="How-It-Works.html#How-It-Works" accesskey="p" rel="prev">How It Works</a>, Up: <a href="Overview.html#Overview" accesskey="u" rel="up">Overview</a> [<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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</div>
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<hr>
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<a name="What-BFD-Version-2-Can-Do-1"></a>
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<h3 class="section">1.3 What BFD Version 2 Can Do</h3>
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<p>When an object file is opened, BFD subroutines automatically determine
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the format of the input object file. They then build a descriptor in
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memory with pointers to routines that will be used to access elements of
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the object file’s data structures.
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</p>
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<p>As different information from the object files is required,
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BFD reads from different sections of the file and processes them.
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For example, a very common operation for the linker is processing symbol
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tables. Each BFD back end provides a routine for converting
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between the object file’s representation of symbols and an internal
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canonical format. When the linker asks for the symbol table of an object
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file, it calls through a memory pointer to the routine from the
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relevant BFD back end which reads and converts the table into a canonical
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form. The linker then operates upon the canonical form. When the link is
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finished and the linker writes the output file’s symbol table,
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another BFD back end routine is called to take the newly
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created symbol table and convert it into the chosen output format.
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</p>
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<table class="menu" border="0" cellspacing="0">
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<tr><td align="left" valign="top">• <a href="BFD-information-loss.html#BFD-information-loss" accesskey="1">BFD information loss</a>:</td><td> </td><td align="left" valign="top">Information Loss
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Canonical-format.html#Canonical-format" accesskey="2">Canonical format</a>:</td><td> </td><td align="left" valign="top">The BFD canonical object-file format
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</td></tr>
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</table>
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</body>
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</html>
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