<HTML
><HEAD
><TITLE
>$B%H%i%V%k%7%e!<%H(B</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.54"><LINK
REL="HOME"
TITLE="Linux I/O $B%]!<%H%W%m%0%i%_%s%0(B mini-HOWTO"
HREF="index.html"><LINK
REL="PREVIOUS"
TITLE="Hints"
HREF="hints.html"><LINK
REL="NEXT"
TITLE="$B%W%m%0%i%`$NNc(B"
HREF="example-code.html"></HEAD
><BODY
CLASS="SECT1"
BGCOLOR="#FFFFFF"
TEXT="#000000"
><DIV
CLASS="NAVHEADER"
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>Linux I/O $B%]!<%H%W%m%0%i%_%s%0(B mini-HOWTO</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="hints.html"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="example-code.html"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="TROUBLESHOOTING"
>8. $B%H%i%V%k%7%e!<%H(B</A
></H1
><P
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
>Q1.</DT
><DD
><P
>$B%]!<%H$r%"%/%;%9$7$?;~$K(B segmentation faults $B$,5/$-$F$7$^$$$^$9!#(B</P
></DD
><DT
>A1.</DT
><DD
><P
>$B%W%m%0%i%`$,(B root $BFC8"$r;}$C$F$$$J$$$+!"$J$s$i$+$NM}M3$G(B
<TT
CLASS="FUNCTION"
>ioperm()</TT
> $B$r8F$S=P$7$?;~$K<:GT$7$F$$$k$N$G(B
$B$7$g$&!#(B
<TT
CLASS="FUNCTION"
>ioperm()</TT
> $B$NJV$jCM$rD4$Y$F$_$F$/$@$5$$!#(B
$B$=$l$HK\Ev$K(B <TT
CLASS="FUNCTION"
>ioperm()</TT
> $B$G5v2D$rF@$?%]!<%H$K(B
$B%"%/%;%9$7$F$$$k$+$I$&$+$bD4$Y$F$_$F$/$@$5$$!#(B
(Q3$B$b;29M$K$7$F$/$@$5$$!#(B)
$B%G%#%l%$IU$-%^%/%m(B (<TT
CLASS="FUNCTION"
>inb_p()</TT
>,
<TT
CLASS="FUNCTION"
>outb_p()</TT
> $B$J$I$J$I(B)$B$r;H$C$F$$$k$J$i!"(B
<TT
CLASS="FUNCTION"
>ioperm()</TT
> $B$G%]!<%H(B 0x80 $B$N%"%/%;%95v2D$bK:$l(B
$B$:$K<hF@$7$F$/$@$5$$!#(B</P
></DD
><DT
>Q2.</DT
><DD
><P
><TT
CLASS="FUNCTION"
>in*()</TT
> $B$H$+(B <TT
CLASS="FUNCTION"
>out*()</TT
>
$B$H$+$N4X?t$,$I$3$K$b$_$D$+$j$^$;$s!#(Bgcc $B$,(B undefined references $B$H$+J86g(B
$B$r8@$C$F$-$^$9!#(B</P
></DD
><DT
>A2.</DT
><DD
><P
>$B%3%s%Q%$%k$N;~$K:GE,2=$r%*%s(B (<TT
CLASS="OPTION"
>-O</TT
>)
$B$K$7$J$+$C$?$N$G$O(B?
$B$=$N7k2L!"(Bgcc $B$O(B <TT
CLASS="FILENAME"
>asm/io.h</TT
> $B$NCf$K$"$k%^%/%m(B
$B$r2r7h$9$k$3$H$,$G$-$J$+$C$?$N$G$9!#(B
$B$=$l$H$b!"(B<TT
CLASS="LITERAL"
>#include <asm/io.h></TT
>
$B$rK:$l$F$^$;$s$+(B?</P
></DD
><DT
>Q3.</DT
><DD
><P
><TT
CLASS="FUNCTION"
>out*()</TT
> $B$r<B9T$7$F$b$J$K$b$*$3$i$J$$!"(B
$B$^$?$O$J$s$+JQ$J$N$G$9$,!#(B</P
></DD
><DT
>A3.</DT
><DD
><P
>$B%Q%i%a!<%?$N=gHV$r%A%'%C%/$7$F2<$5$$!#(B<TT
CLASS="FUNCTION"
>outb(value, port)</TT
> $B$H$$$&=gHV$G$9!#(B
MS-DOS $B$G$*$J$8$_$N(B <TT
CLASS="FUNCTION"
>outportb(port,value)</TT
>
$B$H$O5U$G$9!#(B</P
></DD
><DT
>Q4.</DT
><DD
><P
>$BI8=`$N(B RS-232 $B5!4o!"%Q%i%l%k%W%j%s%?!<!"%8%g%$%9%F%#%C%/(B
$B$H$$$C$?$b$N$r@)8f$7$?$$$N$G$9$,(B...</P
></DD
><DT
>A4.</DT
><DD
><P
>$B$?$V$s4{$K$"$k%I%i%$%P(B( Linux $B$N%+!<%M%k$H$+(B X $B%5!<%P$H$+$=$&$$$C$?$b$N$K(B
$B$/$C$D$$$F$/$k$d$D$N$3$H$G$9!#(B)$B$r;H$C$?J}$,$$$$$G$9!#(B
$B$=$&$$$&%I%i%$%P$O$9$4$/HFMQ@-$,9b$/$F!"$A$g$C$H5,3J30$N5!4o$J$s$+$bBg(B
$BDqF0$-$^$9!#(B
$B$=$3$i$X$s$NJ8=q$X$N%]%$%s%?!<$H$7$F!">e$G=q$$$?I8=`%]!<%H$N>pJs$r;29M(B
$B$K$7$F$/$@$5$$!#(B</P
></DD
></DL
></DIV
></P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="hints.html"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="example-code.html"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>Hints</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
> </TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>$B%W%m%0%i%`$NNc(B</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>
