On Fri, Aug 5, 2011 at 10:53 AM, Akash <email2akashjain@xxxxxxxxx> wrote: > I think it was not built with -g otherwise the symbols would have been there > in the vmlinux itself, right ? Right. > That is the reason I need to add symbols externally. > Please dont ask me to rebuild the kernel, this is vanilla OpenSUSE 11.3 > symbols and debug kernel should be available somewhere. I just need to know > how/where to add the symbols. The problem is not reproducible, I need to > debug the core which I have on hand. > > Thanks. > Akash > I "think" System.map file is not the file which gbd understands , On my system, i tried this: goon:/boot # gdb -q (gdb) symbol-file System.map-2.6.32.12-0.7-default -readnow `/boot/System.map-2.6.32.12-0.7-default': can't read symbols: File format not recognized. I might be missing something else as well. -Amit > > On Thu, Aug 4, 2011 at 10:19 PM, amit mehta <gmate.amit@xxxxxxxxx> wrote: >> >> Not sure about the symbol table, but was your kernel compiled >> with -g flag (-g to the CFLAGS variable in the kernel Makefile) ? >> >> -Amit >> >> On Fri, Aug 5, 2011 at 10:42 AM, Akash <email2akashjain@xxxxxxxxx> wrote: >> > Hello, >> > >> > I have a core dump from following machine : >> > >> > # uname -a >> > Linux sing-vto2-dst 2.6.34.8-0.2-desktop #1 SMP PREEMPT 2011-04-06 >> > 18:11:26 >> > +0200 x86_64 x86_64 x86_64 GNU/Linux >> > >> > I have opened this core in gdb >> > >> > # gdb vmlinux-2.6.34.8-0.2-desktop kernel.core0 >> > GNU gdb 6.6 (build 2009-10-05) >> > Copyright (C) 2006 Free Software Foundation, Inc. >> > GDB is free software, covered by the GNU General Public License, and you >> > are >> > welcome to change it and/or distribute copies of it under certain >> > conditions. >> > Type "show copying" to see the conditions. >> > There is absolutely no warranty for GDB. Type "show warranty" for >> > details. >> > (no debugging symbols found) >> > Program terminated with signal 11, Segmentation fault. >> > #0 0xffffffff8100ba60 in default_idle () >> > >> > >> > How can I add symbols to gdb ? >> > When I try to add symbols from System.map I get following error : >> > >> > (gdb) add-symbol-file System.map-2.6.34.8-0.2-desktop >> > The address where System.map-2.6.34.8-0.2-desktop has been loaded is >> > missing >> > >> > >> > At what address should the System.map be added ? How can I find out that >> > address ? >> > >> > Thanks for any help. >> > >> > Akash >> > _______________________________________________ >> > Kernelnewbies mailing list >> > Kernelnewbies@xxxxxxxxxxxxxxxxx >> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >> > >> > > > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
