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111 lines
4.8 KiB
HTML
111 lines
4.8 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>Write Other Derived Routines (Untitled Document)</title>
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<meta name="description" content="Write Other Derived Routines (Untitled Document)">
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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="Deriving-a-New-Hash-Table-Type.html#Deriving-a-New-Hash-Table-Type" rel="up" title="Deriving a New Hash Table Type">
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<link href="BFD-back-ends.html#BFD-back-ends" rel="next" title="BFD back ends">
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<link href="Write-the-Derived-Creation-Routine.html#Write-the-Derived-Creation-Routine" rel="prev" title="Write the Derived Creation Routine">
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</head>
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<body lang="en">
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<a name="Write-Other-Derived-Routines"></a>
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<div class="header">
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<p>
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Previous: <a href="Write-the-Derived-Creation-Routine.html#Write-the-Derived-Creation-Routine" accesskey="p" rel="prev">Write the Derived Creation Routine</a>, Up: <a href="Deriving-a-New-Hash-Table-Type.html#Deriving-a-New-Hash-Table-Type" accesskey="u" rel="up">Deriving a New Hash Table Type</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="Write-other-derived-routines"></a>
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<h4 class="subsubsection">2.18.4.3 Write other derived routines</h4>
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<p>You will want to write other routines for your new hash table,
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as well.
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</p>
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<p>You will want an initialization routine which calls the
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initialization routine of the hash table you are deriving from
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and initializes any other local fields. For the linker hash
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table, this is <code>_bfd_link_hash_table_init</code> in <code>linker.c</code>.
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</p>
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<p>You will want a lookup routine which calls the lookup routine
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of the hash table you are deriving from and casts the result.
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The linker hash table uses <code>bfd_link_hash_lookup</code> in
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<code>linker.c</code> (this actually takes an additional argument which
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it uses to decide how to return the looked up value).
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</p>
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<p>You may want a traversal routine. This should just call the
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traversal routine of the hash table you are deriving from with
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appropriate casts. The linker hash table uses
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<code>bfd_link_hash_traverse</code> in <code>linker.c</code>.
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</p>
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<p>These routines may simply be defined as macros. For example,
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the a.out backend linker hash table, which is derived from the
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linker hash table, uses macros for the lookup and traversal
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routines. These are <code>aout_link_hash_lookup</code> and
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<code>aout_link_hash_traverse</code> in aoutx.h.
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</p>
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</body>
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</html>
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