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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/Parameters.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
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diff --git a/share/doc/stabs/Parameters.html b/share/doc/stabs/Parameters.html new file mode 100644 index 0000000..56ee66e --- /dev/null +++ b/share/doc/stabs/Parameters.html @@ -0,0 +1,135 @@ +<!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: Parameters</title> + +<meta name="description" content="STABS: Parameters"> +<meta name="keywords" content="STABS: Parameters"> +<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="Register-Parameters.html#Register-Parameters" rel="next" title="Register Parameters"> +<link href="Based-Variables.html#Based-Variables" rel="previous" title="Based Variables"> +<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="Parameters"></a> +<div class="header"> +<p> +Previous: <a href="Based-Variables.html#Based-Variables" accesskey="p" rel="previous">Based Variables</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="Parameters-1"></a> +<h3 class="section">4.7 Parameters</h3> + +<p>Formal parameters to a function are represented by a stab (or sometimes +two; see below) for each parameter. The stabs are in the order in which +the debugger should print the parameters (i.e., the order in which the +parameters are declared in the source file). The exact form of the stab +depends on how the parameter is being passed. +</p> +<a name="index-N_005fPSYM"></a> +<a name="index-C_005fPSYM"></a> +<p>Parameters passed on the stack use the symbol descriptor ‘<samp>p</samp>’ and +the <code>N_PSYM</code> symbol type (or <code>C_PSYM</code> for XCOFF). The value +of the symbol is an offset used to locate the parameter on the stack; +its exact meaning is machine-dependent, but on most machines it is an +offset from the frame pointer. +</p> +<p>As a simple example, the code: +</p> +<div class="example"> +<pre class="example">main (argc, argv) + int argc; + char **argv; +</pre></div> + +<p>produces the stabs: +</p> +<div class="example"> +<pre class="example">.stabs "main:F1",36,0,0,_main # <span class="roman">36 is N_FUN</span> +.stabs "argc:p1",160,0,0,68 # <span class="roman">160 is N_PSYM</span> +.stabs "argv:p20=*21=*2",160,0,0,72 +</pre></div> + +<p>The type definition of <code>argv</code> is interesting because it contains +several type definitions. Type 21 is pointer to type 2 (char) and +<code>argv</code> (type 20) is pointer to type 21. +</p> +<p>The following symbol descriptors are also said to go with <code>N_PSYM</code>. +The value of the symbol is said to be an offset from the argument +pointer (I’m not sure whether this is true or not). +</p> +<div class="example"> +<pre class="example">pP (<<??>>) +pF Fortran function parameter +X (function result variable) +</pre></div> + +<table class="menu" border="0" cellspacing="0"> +<tr><td align="left" valign="top">• <a href="Register-Parameters.html#Register-Parameters" accesskey="1">Register Parameters</a>:</td><td> </td><td align="left" valign="top"> +</td></tr> +<tr><td align="left" valign="top">• <a href="Local-Variable-Parameters.html#Local-Variable-Parameters" accesskey="2">Local Variable Parameters</a>:</td><td> </td><td align="left" valign="top"> +</td></tr> +<tr><td align="left" valign="top">• <a href="Reference-Parameters.html#Reference-Parameters" accesskey="3">Reference Parameters</a>:</td><td> </td><td align="left" valign="top"> +</td></tr> +<tr><td align="left" valign="top">• <a href="Conformant-Arrays.html#Conformant-Arrays" accesskey="4">Conformant Arrays</a>:</td><td> </td><td align="left" valign="top"> +</td></tr> +</table> + +<hr> +<div class="header"> +<p> +Previous: <a href="Based-Variables.html#Based-Variables" accesskey="p" rel="previous">Based Variables</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> + + + +</body> +</html> |