Hi Neha, On Sat, Apr 20, 2013 at 3:11 AM, neha naik <nehanaik27@xxxxxxxxx> wrote: > Hi Sankar, > I found this article for debugging third party module sometime back. I > have not used it still (I kind of look at the hexadeciamal gibberish still > :) ). > But you can give it a try : > > http://www.linux.com/learn/linux-training/33991-the-kernel-newbie-corner-kernel-and-module-debugging-with-gdb > Thanks. But this article seem to talk about using gdb for the kernel development. I am more interested in getting the default dmesg output to show the stack traces with proper filenames and line numbers :) > Regards, > Neha > > On Fri, Apr 19, 2013 at 12:25 PM, Sankar P <sankar.curiosity@xxxxxxxxx> > wrote: >> >> Hi, >> >> I have written a kernel module which I build using: >> >> Makefile (edited a bit) >> ========== >> obj-m := simple.o >> simple-objs := s.o >> >> make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules >> >> ======= >> >> Everything builds fine. But my kernel module caused an oops and the >> message was something like: >> >> myfunctionname +0x2507 +5679 >> >> or some hexadecimal gibberish. I know that I can use some external >> tool to find out what these addresses mean. But, is there a way I can >> get the kernel oops message to print these information along with line >> number ? >> >> Is there a way to build the kernel module with debug symbols ? In user >> space, I usually do "-g" or "-ggdb" and it will give me line numbers >> and filenames neatly while dumping stacktrace. Is there a similar >> facility available for out of tree kernel modules too ? >> >> Even if I give : >> >> $ CFLAGS="-ggdb" make >> >> The output file size (.ko) is not changed. >> >> Can someone help me with building kernel modules with debug info and >> get the filename and line numbers printed in the oops messages / >> coredump ? >> >> Thanks. >> >> >> -- >> Sankar P >> http://psankar.blogspot.com >> >> _______________________________________________ >> Kernelnewbies mailing list >> Kernelnewbies@xxxxxxxxxxxxxxxxx >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > -- Sankar P http://psankar.blogspot.com _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
