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.
103 lines
4.5 KiB
HTML
103 lines
4.5 KiB
HTML
4 years ago
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
|
|
<html>
|
||
|
|
<!-- Copyright (C) 1992-2019 Free Software Foundation, Inc.
|
||
|
|
Contributed by Cygnus Support. Written by Julia Menapace, Jim Kingdon,
|
||
|
|
and David MacKenzie.
|
||
|
|
|
||
|
|
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 no
|
||
|
|
Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
|
||
|
|
Texts. A copy of the license is included in the section entitled "GNU
|
||
|
|
Free Documentation License". -->
|
||
|
|
<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
|
||
|
|
<head>
|
||
|
|
<title>Symbol Table Format (STABS)</title>
|
||
|
|
|
||
|
|
<meta name="description" content="Symbol Table Format (STABS)">
|
||
|
|
<meta name="keywords" content="Symbol Table Format (STABS)">
|
||
|
|
<meta name="resource-type" content="document">
|
||
|
|
<meta name="distribution" content="global">
|
||
|
|
<meta name="Generator" content="makeinfo">
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
|
<link href="index.html#Top" rel="start" title="Top">
|
||
|
|
<link href="Symbol-Types-Index.html#Symbol-Types-Index" rel="index" title="Symbol Types Index">
|
||
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
||
|
|
<link href="Symbol-Tables.html#Symbol-Tables" rel="up" title="Symbol Tables">
|
||
|
|
<link href="Transformations-On-Symbol-Tables.html#Transformations-On-Symbol-Tables" rel="next" title="Transformations On Symbol Tables">
|
||
|
|
<link href="Symbol-Tables.html#Symbol-Tables" rel="prev" title="Symbol Tables">
|
||
|
|
<style type="text/css">
|
||
|
|
<!--
|
||
|
|
a.summary-letter {text-decoration: none}
|
||
|
|
blockquote.indentedblock {margin-right: 0em}
|
||
|
|
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
|
||
|
|
blockquote.smallquotation {font-size: smaller}
|
||
|
|
div.display {margin-left: 3.2em}
|
||
|
|
div.example {margin-left: 3.2em}
|
||
|
|
div.lisp {margin-left: 3.2em}
|
||
|
|
div.smalldisplay {margin-left: 3.2em}
|
||
|
|
div.smallexample {margin-left: 3.2em}
|
||
|
|
div.smalllisp {margin-left: 3.2em}
|
||
|
|
kbd {font-style: oblique}
|
||
|
|
pre.display {font-family: inherit}
|
||
|
|
pre.format {font-family: inherit}
|
||
|
|
pre.menu-comment {font-family: serif}
|
||
|
|
pre.menu-preformatted {font-family: serif}
|
||
|
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
||
|
|
pre.smallexample {font-size: smaller}
|
||
|
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
||
|
|
pre.smalllisp {font-size: smaller}
|
||
|
|
span.nolinebreak {white-space: nowrap}
|
||
|
|
span.roman {font-family: initial; font-weight: normal}
|
||
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
||
|
|
ul.no-bullet {list-style: none}
|
||
|
|
-->
|
||
|
|
</style>
|
||
|
|
|
||
|
|
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body lang="en">
|
||
|
|
<a name="Symbol-Table-Format"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="Transformations-On-Symbol-Tables.html#Transformations-On-Symbol-Tables" accesskey="n" rel="next">Transformations On Symbol Tables</a>, Up: <a href="Symbol-Tables.html#Symbol-Tables" accesskey="u" rel="up">Symbol Tables</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Symbol-Types-Index.html#Symbol-Types-Index" title="Index" rel="index">Index</a>]</p>
|
||
|
|
</div>
|
||
|
|
<hr>
|
||
|
|
<a name="Symbol-Table-Format-1"></a>
|
||
|
|
<h3 class="section">7.1 Symbol Table Format</h3>
|
||
|
|
|
||
|
|
<p>Each time the assembler encounters a stab directive, it puts
|
||
|
|
each field of the stab into a corresponding field in a symbol table
|
||
|
|
entry of its output file. If the stab contains a string field, the
|
||
|
|
symbol table entry for that stab points to a string table entry
|
||
|
|
containing the string data from the stab. Assembler labels become
|
||
|
|
relocatable addresses. Symbol table entries in a.out have the format:
|
||
|
|
</p>
|
||
|
|
<div class="example">
|
||
|
|
<pre class="example">struct internal_nlist {
|
||
|
|
unsigned long n_strx; /* index into string table of name */
|
||
|
|
unsigned char n_type; /* type of symbol */
|
||
|
|
unsigned char n_other; /* misc info (usually empty) */
|
||
|
|
unsigned short n_desc; /* description field */
|
||
|
|
bfd_vma n_value; /* value of symbol */
|
||
|
|
};
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
<p>If the stab has a string, the <code>n_strx</code> field holds the offset in
|
||
|
|
bytes of the string within the string table. The string is terminated
|
||
|
|
by a NUL character. If the stab lacks a string (for example, it was
|
||
|
|
produced by a <code>.stabn</code> or <code>.stabd</code> directive), the
|
||
|
|
<code>n_strx</code> field is zero.
|
||
|
|
</p>
|
||
|
|
<p>Symbol table entries with <code>n_type</code> field values greater than 0x1f
|
||
|
|
originated as stabs generated by the compiler (with one random
|
||
|
|
exception). The other entries were placed in the symbol table of the
|
||
|
|
executable by the assembler or the linker.
|
||
|
|
</p>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|