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| author | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
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| committer | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
| commit | abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch) | |
| tree | 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/stabs/Enumerations.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
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diff --git a/share/doc/stabs/Enumerations.html b/share/doc/stabs/Enumerations.html new file mode 100644 index 0000000..2a256f6 --- /dev/null +++ b/share/doc/stabs/Enumerations.html @@ -0,0 +1,129 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1992-2023 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: Enumerations</title> + +<meta name="description" content="STABS: Enumerations"> +<meta name="keywords" content="STABS: Enumerations"> +<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="Types.html#Types" rel="up" title="Types"> +<link href="Structures.html#Structures" rel="next" title="Structures"> +<link href="Strings.html#Strings" rel="previous" title="Strings"> +<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="Enumerations"></a> +<div class="header"> +<p> +Next: <a href="Structures.html#Structures" accesskey="n" rel="next">Structures</a>, Previous: <a href="Strings.html#Strings" accesskey="p" rel="previous">Strings</a>, Up: <a href="Types.html#Types" accesskey="u" rel="up">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="Enumerations-1"></a> +<h3 class="section">5.7 Enumerations</h3> + +<p>Enumerations are defined with the ‘<samp>e</samp>’ type descriptor. +</p> +<p>The source line below declares an enumeration type at file scope. +The type definition is located after the <code>N_RBRAC</code> that marks the end of +the previous procedure’s block scope, and before the <code>N_FUN</code> that marks +the beginning of the next procedure’s block scope. Therefore it does not +describe a block local symbol, but a file local one. +</p> +<p>The source line: +</p> +<div class="example"> +<pre class="example">enum e_places {first,second=3,last}; +</pre></div> + +<p>generates the following stab: +</p> +<div class="example"> +<pre class="example">.stabs "e_places:T22=efirst:0,second:3,last:4,;",128,0,0,0 +</pre></div> + +<p>The symbol descriptor (‘<samp>T</samp>’) says that the stab describes a +structure, enumeration, or union tag. The type descriptor ‘<samp>e</samp>’, +following the ‘<samp>22=</samp>’ of the type definition narrows it down to an +enumeration type. Following the ‘<samp>e</samp>’ is a list of the elements of +the enumeration. The format is ‘<samp><var>name</var>:<var>value</var>,</samp>’. The +list of elements ends with ‘<samp>;</samp>’. The fact that <var>value</var> is +specified as an integer can cause problems if the value is large. GCC +2.5.2 tries to output it in octal in that case with a leading zero, +which is probably a good thing, although GDB 4.11 supports octal only in +cases where decimal is perfectly good. Negative decimal values are +supported by both GDB and dbx. +</p> +<p>There is no standard way to specify the size of an enumeration type; it +is determined by the architecture (normally all enumerations types are +32 bits). Type attributes can be used to specify an enumeration type of +another size for debuggers which support them; see <a href="String-Field.html#String-Field">String Field</a>. +</p> +<p>Enumeration types are unusual in that they define symbols for the +enumeration values (<code>first</code>, <code>second</code>, and <code>third</code> in the +above example), and even though these symbols are visible in the file as +a whole (rather than being in a more local namespace like structure +member names), they are defined in the type definition for the +enumeration type rather than each having their own symbol. In order to +be fast, GDB will only get symbols from such types (in its initial scan +of the stabs) if the type is the first thing defined after a ‘<samp>T</samp>’ or +‘<samp>t</samp>’ symbol descriptor (the above example fulfills this +requirement). If the type does not have a name, the compiler should +emit it in a nameless stab (see <a href="String-Field.html#String-Field">String Field</a>); GCC does this. +</p> +<hr> +<div class="header"> +<p> +Next: <a href="Structures.html#Structures" accesskey="n" rel="next">Structures</a>, Previous: <a href="Strings.html#Strings" accesskey="p" rel="previous">Strings</a>, Up: <a href="Types.html#Types" accesskey="u" rel="up">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> |