It is entirely possible that the kgdb patches for the 2.6.24 kernel do not work correctly on the ARM architecture.
If you comment out the architecture initialization though, the undefined instruction handler does not get installed that allows kgdb to function properly on this architecture. If you absolutely must use the 2.6.24 kernel perhaps you should use the older version of kgdb prior to the new design implementation. http://git.kernel.org/?p=linux/kernel/git/jwessel/linux-2.6-kgdb.git;a=shortlog;h=kgdb_old_2.6.24 Presently the single processor arch=arm support works correctly and was validated on real hardware in the kgdb-next branch. http://git.kernel.org/?p=linux/kernel/git/jwessel/linux-2.6-kgdb.git;a=shortlog;h=kgdb-next The typical way to work with kgdb in git is as follows --- ##First start by getting a initial git clone from Linus's tree. git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git ##Now you can add a tracking branch for kgdb with: git remote add kgdb git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb.git git remote update ##At this point all the remote branches exist and you could elect to ##look at one, such as the kgdb-next tree. git checkout kgdb/kgdb-next ##First start by getting a initial git clone from Linus's tree. git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git ##Now you can add a tracking branch for kgdb with: git remote add kgdb git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb.git git remote update ##At this point all the remote branches exist and you could elect to ##look at one, such as the kgdb-next tree. git checkout kgdb/kgdb-next ##Now you can exectute all the normal git operations you would like to ##execute to create patches or take a look at things. Do remeber that ##you should consider updating your repository with "git remote update" ##periodically to fetch the latest as the kgdb patches are frequently ##re-based against the tip of the kernel tree. ## ##Here is a useful command: ## Output the whole patch series for kgdb-next as a quilt patch set git-checkout kgdb/kgdb-next rm -rf tmp git-format-patch -n -o tmp master ls tmp > tmp/series The git documentation is a good source to understanding the basics as well as anything complex you might like to do: http://www.kernel.org/pub/software/scm/git/docs/ Jason. Rupesh Gujare wrote: > Hi all, > I am new to kgdb. I am trying to debug over ethernet. But it is > crashing when I try to connect from remote gdb. It seems that it is > crashing in kgdb_breakpoint() function. > > I am testing it on ARM board. also I found that i have to comment > kgdb_arch_init() from kernel/kgdb.c, in order to initialize ARM > architecture specific initialization from arch/arm/kernel/kgdb.c > I am using 2.6.24 kernel for testing. Please tell me where I am going > wrong? > > OOPS message:- > > 320/0xe14) > > [<c006649c>] (kgdb_handle_exception+0x0/0xe14) from [<c0026ca0>] > (kgdb_compiled > > brk_fn+0x2c/0x38) > > [<c0026c74>] (kgdb_compiled_brk_fn+0x0/0x38) from [<c00201a0>] > (do_undefinstr+0x > > 13c/0x1f8) > > [<c0020064>] (do_undefinstr+0x0/0x1f8) from [<c0020c04>] > (__und_svc+0x44/0x60) > > Exception stack(0xc541fee0 to 0xc541ff28) > > fee0: 00000033 00000000 c04bda00 00000001 c028c37c 00000000 c001d9c0 > 00000000 > > ff00: c541e000 00000000 00000001 c541ff34 c541ff38 c541ff28 c0065adc > c0065a68 > > ff20: 40000013 ffffffff > > r8:c541e000 r7:00000000 r6:c001d9c0 r5:c541ff14 r4:ffffffff > > [<c0065a44>] (kgdb_breakpoint+0x0/0x44) from [<c0065adc>] > (kgdb_initial_breakpoi > > nt+0x24/0x30) > > [<c0065ab8>] (kgdb_initial_breakpoint+0x0/0x30) from [<c0065f3c>] > (kgdb_register > > _io_module+0xf8/0x130) > > [<c0065e44>] (kgdb_register_io_module+0x0/0x130) from [<c0148e48>] > (configure_kg > > dboe+0x6c/0xb0) > > r5:00000000 r4:c04c4b30 > > [<c0148ddc>] (configure_kgdboe+0x0/0xb0) from [<c0148fc0>] > (init_kgdboe+0x24/0x4 > > c) > > r4:c04c4b30 > > [<c0148f9c>] (init_kgdboe+0x0/0x4c) from [<c0008964>] > (kernel_init+0xc8/0x290) > > r5:00000000 r4:c001e404 > > [<c000889c>] (kernel_init+0x0/0x290) from [<c003c0ec>] (do_exit+0x0/0x730) > > > Thanks, > Rupesh. > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Kgdb-bugreport mailing list > Kgdb-bugreport@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/kgdb-bugreport > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Kgdb-bugreport mailing list Kgdb-bugreport@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kgdb-bugreport
