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diff --git a/share/doc/stabs/Methods.html b/share/doc/stabs/Methods.html new file mode 100644 index 0000000..650038c --- /dev/null +++ b/share/doc/stabs/Methods.html @@ -0,0 +1,141 @@ +<!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: Methods</title> + +<meta name="description" content="STABS: Methods"> +<meta name="keywords" content="STABS: Methods"> +<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="Cplusplus.html#Cplusplus" rel="up" title="Cplusplus"> +<link href="Method-Type-Descriptor.html#Method-Type-Descriptor" rel="next" title="Method Type Descriptor"> +<link href="Class-Instance.html#Class-Instance" rel="previous" title="Class Instance"> +<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="Methods"></a> +<div class="header"> +<p> +Next: <a href="Method-Type-Descriptor.html#Method-Type-Descriptor" accesskey="n" rel="next">Method Type Descriptor</a>, Previous: <a href="Class-Instance.html#Class-Instance" accesskey="p" rel="previous">Class Instance</a>, Up: <a href="Cplusplus.html#Cplusplus" accesskey="u" rel="up">Cplusplus</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="Method-Definition"></a> +<h3 class="section">8.6 Method Definition</h3> + +<p>The class definition shown above declares Ameth. The C<tt>++</tt> source below +defines Ameth: +</p> +<div class="example"> +<pre class="example">int +baseA::Ameth(int in, char other) +{ + return in; +}; +</pre></div> + + +<p>This method definition yields three stabs following the code of the +method. One stab describes the method itself and following two describe +its parameters. Although there is only one formal argument all methods +have an implicit argument which is the <code>this</code> pointer. The <code>this</code> +pointer is a pointer to the object on which the method was called. Note +that the method name is mangled to encode the class name and argument +types. Name mangling is described in the <small>ARM</small> (<cite>The Annotated +C++ Reference Manual</cite>, by Ellis and Stroustrup, <small>ISBN</small> +0-201-51459-1); <samp>gpcompare.texi</samp> in Cygnus GCC distributions +describes the differences between GNU mangling and <small>ARM</small> +mangling. +</p> +<div class="example"> +<pre class="example">.stabs "name:symbol_descriptor(global function)return_type(int)", + N_FUN, NIL, NIL, code_addr_of_method_start + +.stabs "Ameth__5baseAic:F1",36,0,0,_Ameth__5baseAic +</pre></div> + +<p>Here is the stab for the <code>this</code> pointer implicit argument. The +name of the <code>this</code> pointer is always <code>this</code>. Type 19, the +<code>this</code> pointer is defined as a pointer to type 20, <code>baseA</code>, +but a stab defining <code>baseA</code> has not yet been emitted. Since the +compiler knows it will be emitted shortly, here it just outputs a cross +reference to the undefined symbol, by prefixing the symbol name with +‘<samp>xs</samp>’. +</p> +<div class="example"> +<pre class="example">.stabs "name:sym_desc(register param)type_def(19)= + type_desc(ptr to)type_ref(baseA)= + type_desc(cross-reference to)baseA:",N_RSYM,NIL,NIL,register_number + +.stabs "this:P19=*20=xsbaseA:",64,0,0,8 +</pre></div> + +<p>The stab for the explicit integer argument looks just like a parameter +to a C function. The last field of the stab is the offset from the +argument pointer, which in most systems is the same as the frame +pointer. +</p> +<div class="example"> +<pre class="example">.stabs "name:sym_desc(value parameter)type_ref(int)", + N_PSYM,NIL,NIL,offset_from_arg_ptr + +.stabs "in:p1",160,0,0,72 +</pre></div> + +<p><< The examples that follow are based on A1.C >> +</p> +<hr> +<div class="header"> +<p> +Next: <a href="Method-Type-Descriptor.html#Method-Type-Descriptor" accesskey="n" rel="next">Method Type Descriptor</a>, Previous: <a href="Class-Instance.html#Class-Instance" accesskey="p" rel="previous">Class Instance</a>, Up: <a href="Cplusplus.html#Cplusplus" accesskey="u" rel="up">Cplusplus</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> |