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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 | 6ce4ebed87858ecdd79a1091367c6e961055daa9 (patch) | |
| tree | 1c2a6a60531acf791531bbd9c8ac14c23ef8a66c /share/doc/stabs/Based-Variables.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
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diff --git a/share/doc/stabs/Based-Variables.html b/share/doc/stabs/Based-Variables.html new file mode 100644 index 0000000..0451c50 --- /dev/null +++ b/share/doc/stabs/Based-Variables.html @@ -0,0 +1,111 @@ +<!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: Based Variables</title> + +<meta name="description" content="STABS: Based Variables"> +<meta name="keywords" content="STABS: Based Variables"> +<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="Variables.html#Variables" rel="up" title="Variables"> +<link href="Parameters.html#Parameters" rel="next" title="Parameters"> +<link href="Statics.html#Statics" rel="previous" title="Statics"> +<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="Based-Variables"></a> +<div class="header"> +<p> +Next: <a href="Parameters.html#Parameters" accesskey="n" rel="next">Parameters</a>, Previous: <a href="Statics.html#Statics" accesskey="p" rel="previous">Statics</a>, Up: <a href="Variables.html#Variables" accesskey="u" rel="up">Variables</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="Fortran-Based-Variables"></a> +<h3 class="section">4.6 Fortran Based Variables</h3> + +<p>Fortran (at least, the Sun and SGI dialects of FORTRAN-77) has a feature +which allows allocating arrays with <code>malloc</code>, but which avoids +blurring the line between arrays and pointers the way that C does. In +stabs such a variable uses the ‘<samp>b</samp>’ symbol descriptor. +</p> +<p>For example, the Fortran declarations +</p> +<div class="example"> +<pre class="example">real foo, foo10(10), foo10_5(10,5) +pointer (foop, foo) +pointer (foo10p, foo10) +pointer (foo105p, foo10_5) +</pre></div> + +<p>produce the stabs +</p> +<div class="example"> +<pre class="example">foo:b6 +foo10:bar3;1;10;6 +foo10_5:bar3;1;5;ar3;1;10;6 +</pre></div> + +<p>In this example, <code>real</code> is type 6 and type 3 is an integral type +which is the type of the subscripts of the array (probably +<code>integer</code>). +</p> +<p>The ‘<samp>b</samp>’ symbol descriptor is like ‘<samp>V</samp>’ in that it denotes a +statically allocated symbol whose scope is local to a function; see +See <a href="Statics.html#Statics">Statics</a>. The value of the symbol, instead of being the address +of the variable itself, is the address of a pointer to that variable. +So in the above example, the value of the <code>foo</code> stab is the address +of a pointer to a real, the value of the <code>foo10</code> stab is the +address of a pointer to a 10-element array of reals, and the value of +the <code>foo10_5</code> stab is the address of a pointer to a 5-element array +of 10-element arrays of reals. +</p> + + + +</body> +</html> |