Hello Paddie, On Wed, Sep 28, 2016 at 1:19 AM, Paddie O'Brien <paddieobrien@xxxxxxxxx> wrote: > Hi, > > I have a system call that maps virtual to physical addresses. I have > disabled CONFIG_STRICT_DEVMEM and am reading from /dev/mem to verify > that the contents of the syscall-returned physical address match the > contents of the virtual address. It works fine up to a point. Reading > beyond byte 935321597 in /dev/mem throws a "bad address" error. Not > sure it's relevant but I'm running on virtual box and specifying 1GB > of RAM. Tried with 2GB of RAM and hit the same problem. > > Any idea why I can't read beyond the above point? Can you send the output to cat /proc/iomem? > > Thanks. > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
