2011/4/2 Sengottuvelan S <sengottuvelan.s@gmail.com>:

On Fri, Apr 1, 2011 at 3:32 PM, Sengottuvelan S <sengottuvelan.s@gmail.com> wrote:

...

Hi All,

I am trying to access /dev/mem in my user process. I could not access

Check the kernel config CONFIG_STRICT_DEVMEM

...

because not a privileged access. I tried to use iopl(3) call in linux 2.6, but i am getting unresolved symbol for this.  Is any other way to get access in user process. I am not sure how to solve this. Can you someone throw some light on this.

   if(iopl(3)){         fprintf(stderr, "Cannot get I/O permissions (being root helps)");         return -1;     }

  if ((fd = open("/dev/mem", O_RDWR | O_SYNC)) < 0) {         fprintf(stderr, "Failed to open /dev/mem");         return -1;     }

-- Regards, S. Sengottuvelan.

-- Regards, S. Sengottuvelan.

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-- Best Regards Lin