167 lines
7.6 KiB
HTML
167 lines
7.6 KiB
HTML
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<!-- Copyright (C) 1988-2016 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Using the GNU Compiler Collection (GCC): NDS32 Function Attributes</title>
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<meta name="description" content="Using the GNU Compiler Collection (GCC): NDS32 Function Attributes">
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<meta name="keywords" content="Using the GNU Compiler Collection (GCC): NDS32 Function Attributes">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Function-Attributes.html#Function-Attributes" rel="up" title="Function Attributes">
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<link href="Nios-II-Function-Attributes.html#Nios-II-Function-Attributes" rel="next" title="Nios II Function Attributes">
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<link href="MSP430-Function-Attributes.html#MSP430-Function-Attributes" rel="prev" title="MSP430 Function Attributes">
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="NDS32-Function-Attributes"></a>
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<div class="header">
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<p>
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Next: <a href="Nios-II-Function-Attributes.html#Nios-II-Function-Attributes" accesskey="n" rel="next">Nios II Function Attributes</a>, Previous: <a href="MSP430-Function-Attributes.html#MSP430-Function-Attributes" accesskey="p" rel="prev">MSP430 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>
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</div>
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<hr>
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<a name="NDS32-Function-Attributes-1"></a>
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<h4 class="subsection">6.31.20 NDS32 Function Attributes</h4>
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<p>These function attributes are supported by the NDS32 back end:
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</p>
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<dl compact="compact">
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<dt><code>exception</code></dt>
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<dd><a name="index-exception-function-attribute"></a>
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<a name="index-exception-handler-functions_002c-NDS32"></a>
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<p>Use this attribute on the NDS32 target to indicate that the specified function
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is an exception handler. The compiler will generate corresponding sections
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for use in an exception handler.
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</p>
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</dd>
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<dt><code>interrupt</code></dt>
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<dd><a name="index-interrupt-function-attribute_002c-NDS32"></a>
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<p>On NDS32 target, this attribute indicates that the specified function
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is an interrupt handler. The compiler generates corresponding sections
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for use in an interrupt handler. You can use the following attributes
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to modify the behavior:
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</p><dl compact="compact">
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<dt><code>nested</code></dt>
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<dd><a name="index-nested-function-attribute_002c-NDS32"></a>
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<p>This interrupt service routine is interruptible.
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</p></dd>
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<dt><code>not_nested</code></dt>
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<dd><a name="index-not_005fnested-function-attribute_002c-NDS32"></a>
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<p>This interrupt service routine is not interruptible.
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</p></dd>
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<dt><code>nested_ready</code></dt>
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<dd><a name="index-nested_005fready-function-attribute_002c-NDS32"></a>
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<p>This interrupt service routine is interruptible after <code>PSW.GIE</code>
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(global interrupt enable) is set. This allows interrupt service routine to
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finish some short critical code before enabling interrupts.
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</p></dd>
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<dt><code>save_all</code></dt>
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<dd><a name="index-save_005fall-function-attribute_002c-NDS32"></a>
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<p>The system will help save all registers into stack before entering
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interrupt handler.
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</p></dd>
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<dt><code>partial_save</code></dt>
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<dd><a name="index-partial_005fsave-function-attribute_002c-NDS32"></a>
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<p>The system will help save caller registers into stack before entering
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interrupt handler.
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</p></dd>
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</dl>
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</dd>
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<dt><code>naked</code></dt>
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<dd><a name="index-naked-function-attribute_002c-NDS32"></a>
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<p>This attribute allows the compiler to construct the
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requisite function declaration, while allowing the body of the
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function to be assembly code. The specified function will not have
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prologue/epilogue sequences generated by the compiler. Only basic
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<code>asm</code> statements can safely be included in naked functions
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(see <a href="Basic-Asm.html#Basic-Asm">Basic Asm</a>). While using extended <code>asm</code> or a mixture of
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basic <code>asm</code> and C code may appear to work, they cannot be
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depended upon to work reliably and are not supported.
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</p>
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</dd>
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<dt><code>reset</code></dt>
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<dd><a name="index-reset-function-attribute_002c-NDS32"></a>
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<a name="index-reset-handler-functions"></a>
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<p>Use this attribute on the NDS32 target to indicate that the specified function
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is a reset handler. The compiler will generate corresponding sections
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for use in a reset handler. You can use the following attributes
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to provide extra exception handling:
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</p><dl compact="compact">
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<dt><code>nmi</code></dt>
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<dd><a name="index-nmi-function-attribute_002c-NDS32"></a>
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<p>Provide a user-defined function to handle NMI exception.
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</p></dd>
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<dt><code>warm</code></dt>
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<dd><a name="index-warm-function-attribute_002c-NDS32"></a>
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<p>Provide a user-defined function to handle warm reset exception.
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</p></dd>
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</dl>
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</dd>
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</dl>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Nios-II-Function-Attributes.html#Nios-II-Function-Attributes" accesskey="n" rel="next">Nios II Function Attributes</a>, Previous: <a href="MSP430-Function-Attributes.html#MSP430-Function-Attributes" accesskey="p" rel="prev">MSP430 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>
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</div>
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</body>
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