124 lines
5.7 KiB
HTML
124 lines
5.7 KiB
HTML
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
|
|
<html>
|
||
|
|
<!-- Copyright (C) 1988-2016 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
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 the
|
||
|
|
Invariant Sections being "Funding Free Software", the Front-Cover
|
||
|
|
Texts being (a) (see below), and with the Back-Cover Texts being (b)
|
||
|
|
(see below). A copy of the license is included in the section entitled
|
||
|
|
"GNU Free Documentation License".
|
||
|
|
|
||
|
|
(a) The FSF's Front-Cover Text is:
|
||
|
|
|
||
|
|
A GNU Manual
|
||
|
|
|
||
|
|
(b) The FSF's Back-Cover Text is:
|
||
|
|
|
||
|
|
You have freedom to copy and modify this GNU Manual, like GNU
|
||
|
|
software. Copies published by the Free Software Foundation raise
|
||
|
|
funds for GNU development. -->
|
||
|
|
<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
|
||
|
|
<head>
|
||
|
|
<title>Using the GNU Compiler Collection (GCC): MicroBlaze Function Attributes</title>
|
||
|
|
|
||
|
|
<meta name="description" content="Using the GNU Compiler Collection (GCC): MicroBlaze Function Attributes">
|
||
|
|
<meta name="keywords" content="Using the GNU Compiler Collection (GCC): MicroBlaze Function Attributes">
|
||
|
|
<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="Option-Index.html#Option-Index" rel="index" title="Option Index">
|
||
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
||
|
|
<link href="Function-Attributes.html#Function-Attributes" rel="up" title="Function Attributes">
|
||
|
|
<link href="Microsoft-Windows-Function-Attributes.html#Microsoft-Windows-Function-Attributes" rel="next" title="Microsoft Windows Function Attributes">
|
||
|
|
<link href="MeP-Function-Attributes.html#MeP-Function-Attributes" rel="prev" title="MeP Function Attributes">
|
||
|
|
<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="MicroBlaze-Function-Attributes"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="Microsoft-Windows-Function-Attributes.html#Microsoft-Windows-Function-Attributes" accesskey="n" rel="next">Microsoft Windows Function Attributes</a>, Previous: <a href="MeP-Function-Attributes.html#MeP-Function-Attributes" accesskey="p" rel="prev">MeP Function Attributes</a>, Up: <a href="Function-Attributes.html#Function-Attributes" accesskey="u" rel="up">Function Attributes</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
|
||
|
|
</div>
|
||
|
|
<hr>
|
||
|
|
<a name="MicroBlaze-Function-Attributes-1"></a>
|
||
|
|
<h4 class="subsection">6.31.16 MicroBlaze Function Attributes</h4>
|
||
|
|
|
||
|
|
<p>These function attributes are supported on MicroBlaze targets:
|
||
|
|
</p>
|
||
|
|
<dl compact="compact">
|
||
|
|
<dt><code>save_volatiles</code></dt>
|
||
|
|
<dd><a name="index-save_005fvolatiles-function-attribute_002c-MicroBlaze"></a>
|
||
|
|
<p>Use this attribute to indicate that the function is
|
||
|
|
an interrupt handler. All volatile registers (in addition to non-volatile
|
||
|
|
registers) are saved in the function prologue. If the function is a leaf
|
||
|
|
function, only volatiles used by the function are saved. A normal function
|
||
|
|
return is generated instead of a return from interrupt.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>break_handler</code></dt>
|
||
|
|
<dd><a name="index-break_005fhandler-function-attribute_002c-MicroBlaze"></a>
|
||
|
|
<a name="index-break-handler-functions"></a>
|
||
|
|
<p>Use this attribute to indicate that
|
||
|
|
the specified function is a break handler. The compiler generates function
|
||
|
|
entry and exit sequences suitable for use in an break handler when this
|
||
|
|
attribute is present. The return from <code>break_handler</code> is done through
|
||
|
|
the <code>rtbd</code> instead of <code>rtsd</code>.
|
||
|
|
</p>
|
||
|
|
<div class="smallexample">
|
||
|
|
<pre class="smallexample">void f () __attribute__ ((break_handler));
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
</dd>
|
||
|
|
<dt><code>interrupt_handler</code></dt>
|
||
|
|
<dt><code>fast_interrupt</code></dt>
|
||
|
|
<dd><a name="index-interrupt_005fhandler-function-attribute_002c-MicroBlaze"></a>
|
||
|
|
<a name="index-fast_005finterrupt-function-attribute_002c-MicroBlaze"></a>
|
||
|
|
<p>These attributes indicate that the specified function is an interrupt
|
||
|
|
handler. Use the <code>fast_interrupt</code> attribute to indicate handlers
|
||
|
|
used in low-latency interrupt mode, and <code>interrupt_handler</code> for
|
||
|
|
interrupts that do not use low-latency handlers. In both cases, GCC
|
||
|
|
emits appropriate prologue code and generates a return from the handler
|
||
|
|
using <code>rtid</code> instead of <code>rtsd</code>.
|
||
|
|
</p></dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|