Ok Guys
>From user space
try this
#include <linux/kernel.h>
#include <linux/version.h>
#include <unistd.h>
#include <asm/io.h>
#define SER_PORT 0x02f8
main()
{
int i,n;
ioperm(SER_PORT,10,3);
for (i = 0; i < 100; i++)
n = inb(SER_PORT);
}
This will STILL core dump unless you run as root
works on 2.0.36 and 2.2.9
try...
man iopl
man ioperm
regards
Phil Wilshire
Arturo Espinosa Soley wrote:
>
> > You should add -O2 option during compile your program.
> > Example: cc -O2 -o example example.c
>
> Adolf, this is my command line,
> gcc -o artur -O2 -I/usr/src/linux/include/linux artur.c
>
> > im getting this message (segmentation fault) when i try to run a
> > program
> > with a simple
> >
> > readb(0x02f8)
> >
> > in it.
>
> and this is the program
>
> #include <linux/kernel.h>
> #include <linux/version.h>
> #include <linux/cons.h>
> #include <asm/io.h>
>
> #define SER_PORT 0x02f8
>
> main()
> {
> int i,n;
>
> for (i = 0; i < 100; i++)
> n = readb(SER_PORT);
>
> }
>
> >
> > whats wrong?
> >
> > thanks,
> > Art.
>
> --- [rtl] ---
> To unsubscribe:
> echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
> echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED]
> ----
> For more information on Real-Time Linux see:
> http://www.rtlinux.org/~rtlinux/
--- [rtl] ---
To unsubscribe:
echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED]
----
For more information on Real-Time Linux see:
http://www.rtlinux.org/~rtlinux/
