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diff --git a/share/doc/gcc/ARC-Function-Attributes.html b/share/doc/gcc/ARC-Function-Attributes.html new file mode 100644 index 0000000..da0fd64 --- /dev/null +++ b/share/doc/gcc/ARC-Function-Attributes.html @@ -0,0 +1,173 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- This file documents the use of the GNU compilers. + +Copyright (C) 1988-2023 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 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>Using the GNU Compiler Collection (GCC): ARC Function Attributes</title> + +<meta name="description" content="Using the GNU Compiler Collection (GCC): ARC Function Attributes"> +<meta name="keywords" content="Using the GNU Compiler Collection (GCC): ARC 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="Indices.html#Indices" rel="index" title="Indices"> +<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="ARM-Function-Attributes.html#ARM-Function-Attributes" rel="next" title="ARM Function Attributes"> +<link href="AMD-GCN-Function-Attributes.html#AMD-GCN-Function-Attributes" rel="previous" title="AMD GCN 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_US" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="ARC-Function-Attributes"></a> +<div class="header"> +<p> +Next: <a href="ARM-Function-Attributes.html#ARM-Function-Attributes" accesskey="n" rel="next">ARM Function Attributes</a>, Previous: <a href="AMD-GCN-Function-Attributes.html#AMD-GCN-Function-Attributes" accesskey="p" rel="previous">AMD GCN 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="Indices.html#Indices" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="ARC-Function-Attributes-1"></a> +<h4 class="subsection">6.33.4 ARC Function Attributes</h4> + +<p>These function attributes are supported by the ARC back end: +</p> +<dl compact="compact"> +<dd><a name="index-interrupt-function-attribute_002c-ARC"></a> +</dd> +<dt><code>interrupt</code></dt> +<dd><p>Use this attribute to indicate +that the specified function is an interrupt handler. The compiler generates +function entry and exit sequences suitable for use in an interrupt handler +when this attribute is present. +</p> +<p>On the ARC, you must specify the kind of interrupt to be handled +in a parameter to the interrupt attribute like this: +</p> +<div class="smallexample"> +<pre class="smallexample">void f () __attribute__ ((interrupt ("ilink1"))); +</pre></div> + +<p>Permissible values for this parameter are: <code>ilink1</code><!-- /@w --> and +<code>ilink2</code><!-- /@w --> for ARCv1 architecture, and <code>ilink</code><!-- /@w --> and +<code>firq</code><!-- /@w --> for ARCv2 architecture. +</p> +<a name="index-long_005fcall-function-attribute_002c-ARC"></a> +<a name="index-medium_005fcall-function-attribute_002c-ARC"></a> +<a name="index-short_005fcall-function-attribute_002c-ARC"></a> +<a name="index-indirect-calls_002c-ARC"></a> +</dd> +<dt><code>long_call</code></dt> +<dt><code>medium_call</code></dt> +<dt><code>short_call</code></dt> +<dd><p>These attributes specify how a particular function is called. +These attributes override the +<samp>-mlong-calls</samp> and <samp>-mmedium-calls</samp> (see <a href="ARC-Options.html#ARC-Options">ARC Options</a>) +command-line switches and <code>#pragma long_calls</code> settings. +</p> +<p>For ARC, a function marked with the <code>long_call</code> attribute is +always called using register-indirect jump-and-link instructions, +thereby enabling the called function to be placed anywhere within the +32-bit address space. A function marked with the <code>medium_call</code> +attribute will always be close enough to be called with an unconditional +branch-and-link instruction, which has a 25-bit offset from +the call site. A function marked with the <code>short_call</code> +attribute will always be close enough to be called with a conditional +branch-and-link instruction, which has a 21-bit offset from +the call site. +</p> +<a name="index-jli_005falways-function-attribute_002c-ARC"></a> +</dd> +<dt><code>jli_always</code></dt> +<dd><p>Forces a particular function to be called using <code>jli</code> +instruction. The <code>jli</code> instruction makes use of a table stored +into <code>.jlitab</code> section, which holds the location of the functions +which are addressed using this instruction. +</p> +<a name="index-jli_005ffixed-function-attribute_002c-ARC"></a> +</dd> +<dt><code>jli_fixed</code></dt> +<dd><p>Identical like the above one, but the location of the function in the +<code>jli</code> table is known and given as an attribute parameter. +</p> +<a name="index-secure_005fcall-function-attribute_002c-ARC"></a> +</dd> +<dt><code>secure_call</code></dt> +<dd><p>This attribute allows one to mark secure-code functions that are +callable from normal mode. The location of the secure call function +into the <code>sjli</code> table needs to be passed as argument. +</p> +<a name="index-naked-function-attribute_002c-ARC"></a> +</dd> +<dt><code>naked</code></dt> +<dd><p>This attribute allows the compiler to construct the requisite function +declaration, while allowing the body of the function to be assembly +code. The specified function will not have prologue/epilogue +sequences generated by the compiler. Only basic <code>asm</code> statements +can safely be included in naked functions (see <a href="Basic-Asm.html#Basic-Asm">Basic Asm</a>). While +using extended <code>asm</code> or a mixture of basic <code>asm</code> and C code +may appear to work, they cannot be depended upon to work reliably and +are not supported. +</p> +</dd> +</dl> + +<hr> +<div class="header"> +<p> +Next: <a href="ARM-Function-Attributes.html#ARM-Function-Attributes" accesskey="n" rel="next">ARM Function Attributes</a>, Previous: <a href="AMD-GCN-Function-Attributes.html#AMD-GCN-Function-Attributes" accesskey="p" rel="previous">AMD GCN 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="Indices.html#Indices" title="Index" rel="index">Index</a>]</p> +</div> + + + +</body> +</html> |