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84 lines
3.7 KiB
HTML
84 lines
3.7 KiB
HTML
4 years ago
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<html>
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Syscalls (The Red Hat newlib C Library)</title>
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<meta name="description" content="Syscalls (The Red Hat newlib C Library)">
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<meta name="keywords" content="Syscalls (The Red Hat newlib C Library)">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
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<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="index.html#Top" rel="up" title="Top">
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<link href="Stubs.html#Stubs" rel="next" title="Stubs">
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<link href="Object-Size-Checking.html#Object-Size-Checking" rel="prev" title="Object Size Checking">
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</head>
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<body lang="en">
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<a name="Syscalls"></a>
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<div class="header">
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<p>
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Next: <a href="Arglists.html#Arglists" accesskey="n" rel="next">Arglists</a>, Previous: <a href="Overflow-Protection.html#Overflow-Protection" accesskey="p" rel="prev">Overflow Protection</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="System-Calls"></a>
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<h2 class="chapter">13 System Calls</h2>
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<a name="index-linking-the-C-library"></a>
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<p>The C subroutine library depends on a handful of subroutine calls for
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operating system services. If you use the C library on a system that
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complies with the POSIX.1 standard (also known as IEEE 1003.1), most of
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these subroutines are supplied with your operating system.
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</p>
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<p>If some of these subroutines are not provided with your system—in
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the extreme case, if you are developing software for a “bare board”
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system, without an OS—you will at least need to provide do-nothing
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stubs (or subroutines with minimal functionality) to allow your
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programs to link with the subroutines in <code>libc.a</code>.
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</p>
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<table class="menu" border="0" cellspacing="0">
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<tr><td align="left" valign="top">• <a href="Stubs.html#Stubs" accesskey="1">Stubs</a>:</td><td> </td><td align="left" valign="top">Definitions for OS interface
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Reentrant-Syscalls.html#Reentrant-Syscalls" accesskey="2">Reentrant Syscalls</a>:</td><td> </td><td align="left" valign="top">Reentrant covers for OS subroutines
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</td></tr>
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</table>
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</body>
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</html>
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