80 lines
3.6 KiB
HTML
80 lines
3.6 KiB
HTML
|
<html lang="en">
|
||
|
<head>
|
||
|
<title>Stab Section Transformations - STABS</title>
|
||
|
<meta http-equiv="Content-Type" content="text/html">
|
||
|
<meta name="description" content="STABS">
|
||
|
<meta name="generator" content="makeinfo 4.13">
|
||
|
<link title="Top" rel="start" href="index.html#Top">
|
||
|
<link rel="up" href="Transformations-On-Symbol-Tables.html#Transformations-On-Symbol-Tables" title="Transformations On Symbol Tables">
|
||
|
<link rel="prev" href="Transformations-On-Global-Variables.html#Transformations-On-Global-Variables" title="Transformations On Global Variables">
|
||
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
||
|
<!--
|
||
|
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''.-->
|
||
|
<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="Stab-Section-Transformations"></a>
|
||
|
<p>
|
||
|
Previous: <a rel="previous" accesskey="p" href="Transformations-On-Global-Variables.html#Transformations-On-Global-Variables">Transformations On Global Variables</a>,
|
||
|
Up: <a rel="up" accesskey="u" href="Transformations-On-Symbol-Tables.html#Transformations-On-Symbol-Tables">Transformations On Symbol Tables</a>
|
||
|
<hr>
|
||
|
</div>
|
||
|
|
||
|
<h4 class="subsection">7.2.3 Transformations of Stabs in separate sections</h4>
|
||
|
|
||
|
<p>For object file formats using stabs in separate sections (see <a href="Stab-Sections.html#Stab-Sections">Stab Sections</a>), use <code>objdump --stabs</code> instead of <code>nm</code> to show the
|
||
|
stabs in an object or executable file. <code>objdump</code> is a GNU utility;
|
||
|
Sun does not provide any equivalent.
|
||
|
|
||
|
<p>The following example is for a stab whose value is an address is
|
||
|
relative to the compilation unit (see <a href="ELF-Linker-Relocation.html#ELF-Linker-Relocation">ELF Linker Relocation</a>). For
|
||
|
example, if the source line
|
||
|
|
||
|
<pre class="example"> static int ld = 5;
|
||
|
</pre>
|
||
|
<p>appears within a function, then the assembly language output from the
|
||
|
compiler contains:
|
||
|
|
||
|
<pre class="example"> .Ddata.data:
|
||
|
...
|
||
|
.stabs "ld:V(0,3)",0x26,0,4,.L18-Ddata.data # <span class="roman">0x26 is N_STSYM</span>
|
||
|
...
|
||
|
.L18:
|
||
|
.align 4
|
||
|
.word 0x5
|
||
|
</pre>
|
||
|
<p>Because the value is formed by subtracting one symbol from another, the
|
||
|
value is absolute, not relocatable, and so the object file contains
|
||
|
|
||
|
<pre class="example"> Symnum n_type n_othr n_desc n_value n_strx String
|
||
|
31 STSYM 0 4 00000004 680 ld:V(0,3)
|
||
|
</pre>
|
||
|
<p>without any relocations, and the executable file also contains
|
||
|
|
||
|
<pre class="example"> Symnum n_type n_othr n_desc n_value n_strx String
|
||
|
31 STSYM 0 4 00000004 680 ld:V(0,3)
|
||
|
</pre>
|
||
|
</body></html>
|
||
|
|