<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
<html>
|
<!-- Copyright (C) 1992-2021 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 5.1, http://www.gnu.org/software/texinfo/ -->
|
<head>
|
<title>STABS: Traditional Integer Types</title>
|
|
<meta name="description" content="STABS: Traditional Integer Types">
|
<meta name="keywords" content="STABS: Traditional Integer Types">
|
<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="Traditional-Builtin-Types.html#Traditional-Builtin-Types" rel="up" title="Traditional Builtin Types">
|
<link href="Traditional-Other-Types.html#Traditional-Other-Types" rel="next" title="Traditional Other Types">
|
<link href="Traditional-Builtin-Types.html#Traditional-Builtin-Types" rel="previous" title="Traditional Builtin Types">
|
<style type="text/css">
|
<!--
|
a.summary-letter {text-decoration: none}
|
blockquote.smallquotation {font-size: smaller}
|
div.display {margin-left: 3.2em}
|
div.example {margin-left: 3.2em}
|
div.indentedblock {margin-left: 3.2em}
|
div.lisp {margin-left: 3.2em}
|
div.smalldisplay {margin-left: 3.2em}
|
div.smallexample {margin-left: 3.2em}
|
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
|
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.nocodebreak {white-space:nowrap}
|
span.nolinebreak {white-space:nowrap}
|
span.roman {font-family:serif; font-weight:normal}
|
span.sansserif {font-family:sans-serif; font-weight:normal}
|
ul.no-bullet {list-style: none}
|
-->
|
</style>
|
|
|
</head>
|
|
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
|
<a name="Traditional-Integer-Types"></a>
|
<div class="header">
|
<p>
|
Next: <a href="Traditional-Other-Types.html#Traditional-Other-Types" accesskey="n" rel="next">Traditional Other Types</a>, Up: <a href="Traditional-Builtin-Types.html#Traditional-Builtin-Types" accesskey="u" rel="up">Traditional Builtin Types</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="Traditional-Integer-Types-1"></a>
|
<h4 class="subsubsection">5.1.1.1 Traditional Integer Types</h4>
|
|
<p>Often types are defined as subranges of themselves. If the bounding values
|
fit within an <code>int</code>, then they are given normally. For example:
|
</p>
|
<div class="example">
|
<pre class="example">.stabs "int:t1=r1;-2147483648;2147483647;",128,0,0,0 # <span class="roman">128 is N_LSYM</span>
|
.stabs "char:t2=r2;0;127;",128,0,0,0
|
</pre></div>
|
|
<p>Builtin types can also be described as subranges of <code>int</code>:
|
</p>
|
<div class="example">
|
<pre class="example">.stabs "unsigned short:t6=r1;0;65535;",128,0,0,0
|
</pre></div>
|
|
<p>If the lower bound of a subrange is 0 and the upper bound is -1,
|
the type is an unsigned integral type whose bounds are too
|
big to describe in an <code>int</code>. Traditionally this is only used for
|
<code>unsigned int</code> and <code>unsigned long</code>:
|
</p>
|
<div class="example">
|
<pre class="example">.stabs "unsigned int:t4=r1;0;-1;",128,0,0,0
|
</pre></div>
|
|
<p>For larger types, GCC 2.4.5 puts out bounds in octal, with one or more
|
leading zeroes. In this case a negative bound consists of a number
|
which is a 1 bit (for the sign bit) followed by a 0 bit for each bit in
|
the number (except the sign bit), and a positive bound is one which is a
|
1 bit for each bit in the number (except possibly the sign bit). All
|
known versions of dbx and GDB version 4 accept this (at least in the
|
sense of not refusing to process the file), but GDB 3.5 refuses to read
|
the whole file containing such symbols. So GCC 2.3.3 did not output the
|
proper size for these types. As an example of octal bounds, the string
|
fields of the stabs for 64 bit integer types look like:
|
</p>
|
<div class="example">
|
<pre class="example">long int:t3=r1;001000000000000000000000;000777777777777777777777;
|
long unsigned int:t5=r1;000000000000000000000000;001777777777777777777777;
|
</pre></div>
|
|
<p>If the lower bound of a subrange is 0 and the upper bound is negative,
|
the type is an unsigned integral type whose size in bytes is the
|
absolute value of the upper bound. I believe this is a Convex
|
convention for <code>unsigned long long</code>.
|
</p>
|
<p>If the lower bound of a subrange is negative and the upper bound is 0,
|
the type is a signed integral type whose size in bytes is
|
the absolute value of the lower bound. I believe this is a Convex
|
convention for <code>long long</code>. To distinguish this from a legitimate
|
subrange, the type should be a subrange of itself. I’m not sure whether
|
this is the case for Convex.
|
</p>
|
<hr>
|
<div class="header">
|
<p>
|
Next: <a href="Traditional-Other-Types.html#Traditional-Other-Types" accesskey="n" rel="next">Traditional Other Types</a>, Up: <a href="Traditional-Builtin-Types.html#Traditional-Builtin-Types" accesskey="u" rel="up">Traditional Builtin Types</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>
|
|
|
|
</body>
|
</html>
|
