203 lines
3.0 KiB
HTML
203 lines
3.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
|
|
<HTML
|
|
><HEAD
|
|
><TITLE
|
|
>testmycall.h (new user space header file to be created)</TITLE
|
|
><META
|
|
NAME="GENERATOR"
|
|
CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
|
|
REL="HOME"
|
|
TITLE="Implementing a System Call on Linux 2.6 for i386"
|
|
HREF="index.html"><LINK
|
|
REL="PREVIOUS"
|
|
TITLE="New user space files, to be created, to test our system call"
|
|
HREF="x125.html"><LINK
|
|
REL="NEXT"
|
|
TITLE="testmycall.c (new user space source file to be created)"
|
|
HREF="x156.html"></HEAD
|
|
><BODY
|
|
CLASS="sect1"
|
|
BGCOLOR="#FFFFFF"
|
|
TEXT="#000000"
|
|
LINK="#0000FF"
|
|
VLINK="#840084"
|
|
ALINK="#0000FF"
|
|
><DIV
|
|
CLASS="NAVHEADER"
|
|
><TABLE
|
|
SUMMARY="Header navigation table"
|
|
WIDTH="100%"
|
|
BORDER="0"
|
|
CELLPADDING="0"
|
|
CELLSPACING="0"
|
|
><TR
|
|
><TH
|
|
COLSPAN="3"
|
|
ALIGN="center"
|
|
>Implementing a System Call on Linux 2.6 for i386</TH
|
|
></TR
|
|
><TR
|
|
><TD
|
|
WIDTH="10%"
|
|
ALIGN="left"
|
|
VALIGN="bottom"
|
|
><A
|
|
HREF="x125.html"
|
|
ACCESSKEY="P"
|
|
>Prev</A
|
|
></TD
|
|
><TD
|
|
WIDTH="80%"
|
|
ALIGN="center"
|
|
VALIGN="bottom"
|
|
></TD
|
|
><TD
|
|
WIDTH="10%"
|
|
ALIGN="right"
|
|
VALIGN="bottom"
|
|
><A
|
|
HREF="x156.html"
|
|
ACCESSKEY="N"
|
|
>Next</A
|
|
></TD
|
|
></TR
|
|
></TABLE
|
|
><HR
|
|
ALIGN="LEFT"
|
|
WIDTH="100%"></DIV
|
|
><DIV
|
|
CLASS="sect1"
|
|
><H1
|
|
CLASS="sect1"
|
|
><A
|
|
NAME="AEN127"
|
|
></A
|
|
>14. testmycall.h (new user space header file to be created)</H1
|
|
><P
|
|
>testmycall.h</P
|
|
><P
|
|
></P
|
|
><P
|
|
></P
|
|
><OL
|
|
TYPE="1"
|
|
><LI
|
|
><P
|
|
>Create a header file called testmycall.h. This header file should be included by any program calling our system call.</P
|
|
></LI
|
|
><LI
|
|
><P
|
|
>Add three lines to it</P
|
|
></LI
|
|
></OL
|
|
><P
|
|
></P
|
|
><OL
|
|
TYPE="1"
|
|
><LI
|
|
><P
|
|
>Line 1: This is needed because we need the definition of _syscall1.</P
|
|
></LI
|
|
></OL
|
|
><P
|
|
>#include<linux/unistd.h></P
|
|
><P
|
|
></P
|
|
><OL
|
|
TYPE="1"
|
|
><LI
|
|
><P
|
|
>Line 2: This is needed because we need the number of our system call.</P
|
|
></LI
|
|
></OL
|
|
><P
|
|
>#define __NR_mycall 317</P
|
|
><P
|
|
></P
|
|
><OL
|
|
TYPE="1"
|
|
><LI
|
|
><P
|
|
>Line 3: This is needed for system calls with 1 argument. It is explained in detail below.</P
|
|
></LI
|
|
></OL
|
|
><P
|
|
>_syscall1(long, mycall, int, i)</P
|
|
><P
|
|
></P
|
|
><P
|
|
>So, our user header file looks like:</P
|
|
><P
|
|
></P
|
|
><P
|
|
>/*---Start of header file------*/</P
|
|
><P
|
|
>#include<linux/unistd.h></P
|
|
><P
|
|
>#define __NR_mycall 317</P
|
|
><P
|
|
>_syscall1(long, mycall, int, i)</P
|
|
><P
|
|
>/*---End of header file--------*/</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="NAVFOOTER"
|
|
><HR
|
|
ALIGN="LEFT"
|
|
WIDTH="100%"><TABLE
|
|
SUMMARY="Footer navigation table"
|
|
WIDTH="100%"
|
|
BORDER="0"
|
|
CELLPADDING="0"
|
|
CELLSPACING="0"
|
|
><TR
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="left"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="x125.html"
|
|
ACCESSKEY="P"
|
|
>Prev</A
|
|
></TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="index.html"
|
|
ACCESSKEY="H"
|
|
>Home</A
|
|
></TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="x156.html"
|
|
ACCESSKEY="N"
|
|
>Next</A
|
|
></TD
|
|
></TR
|
|
><TR
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="left"
|
|
VALIGN="top"
|
|
>New user space files, to be created, to test our system call</TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
|
> </TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
>testmycall.c (new user space source file to be created)</TD
|
|
></TR
|
|
></TABLE
|
|
></DIV
|
|
></BODY
|
|
></HTML
|
|
> |