Re: Fwd: My simple kernel module wont compile

testlaster <testlaster@xxxxxxxxx> · Fri, 12 Sep 2014 10:11:28 +0200



    Yes I did run sudo apt-get install build-essential
    linux-headers-$(uname -r) to download the necessary headers. I also
    ran an apt-get for source files and it did install a whole bunch of
    them but Im not under the impression that you actually need the
    source files as well since they suppose to come with the OS?

    
    The thing its complaining about... unistd_32.h appears to really be
    missing. Could this be because of a 64Bit version of the OS? Maybes
    just doesnt install it because its not necessary. But that wouldnt
    make sense because in unistd.h the only include there is will be the
    unistd_32.h and nowhere inside stands anything of
    #include<unistd_64.h>

    
    On 9/11/2014 5:06 PM, Gustavo
      Bittencourt wrote:

    
      Did you install the kernel source or at least the
        kernel headers?
        

            ---------- Forwarded message
              ----------

              From: testlaster <testlaster@xxxxxxxxx>

              Date: Thu, Sep 11, 2014 at 11:13 AM

              Subject: Re: My simple kernel module wont compile

              To: kernelnewbies@xxxxxxxxxxxxxxxxx

              
               Hi Gustavo

                
                I tried your suggestions.

                
                The first line didn't work because I seem to not have a
                build directory there.

                And the second one did exactly the same as mine did.
                
                  
                    On 9/11/2014 3:49 PM, Gustavo Bittencourt
                      wrote:

                    
                        Maybe you should replace the KERNEL_DIR

                            definition in MAKEFILE. My suggestions:
                        
                          
                          KERNEL_DIR:=/usr/src/linux-headers-$(shell

                          uname -r)/build

                        
                        or
                        KERNEL_DIR:=/lib/modules/$(shell

                            uname -r)/build

                        
                        On Thu, Sep 11, 2014 at
                          8:12 AM, testlaster <testlaster@xxxxxxxxx>
                          wrote:

                          
                             Hey
                              Guys

                              
                              All im trying to do here is learn about
                              make files and how to link linux header
                              files stored in /usr/src/linux-headers-3.13.0-35-generic
                              to my program that im writing.

                              So far ive been getting the simplest of
                              Kernel Modules to compile and load in
                              Linux but nothing useful . The moment I
                              delve deeper I seem to get missing header
                              file errors when using "make".

                              All I want to do is write from Kernel
                              space into user space and visa verse. I
                              will be dumping allocated PCI memory
                              blocks into files.

                              I will also have to edit registers of the
                              PCI to be able to make triggers go off by
                              setting bits high etc.

                              But this is just an introduction to it all
                              and im already having trouble compiling.

                              
                              Now im not 100% sure if its missing header
                              files but the errors is quite large.

                              
                               This is my Pastebin of the C MODULE Code
                              :

                              
                               pastebin.com/lWPBR8DJ 
                              

                               And here it the PASTEBIN of my MAKEFILE
                              and its errors:

                              
                               pastebin.com/ffT1F26N

                              
                              ALSO...Does anybody know of a good
                              tutorial on how to write a PCI driver in
                              Kernel space using kernel modules...also
                              how to send data from and to the module
                              from UserSpace?

                            
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