Re: [Kgdb-bugreport] Announce: New kgdb design available for 2.6.24 and 2.6.25

[Jason W. <jas...@wi...>]

Somethings moved around after kgdb was merged to the mainline.

These are the docs for the "full kgdb" which is in the kgdb-next tree.
http://kernel.org/pub/linux/kernel/people/jwessel/kgdb/

Only a subset of kgdb exists in the 2.6.26 kernel tree, which includes
the x86 architecture, the kgdb core, and kgdboc.

The kgdb-next branch can be found at:
http://git.kernel.org/?p=linux/kernel/git/jwessel/linux-2.6-kgdb.git;a=shortlog;h=kgdb-next

Jason.

Milind Dumbare wrote:
> Looking great. Thanks Jason,
>
> Could you please recheck the The kgdb documentation link
> (http://kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb/)
> <http://kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb/>
> I was not able to open it.
>
> -Miline
>
>
> On Sat, Mar 29, 2008 at 12:22 AM, Jason Wessel
> <jas...@wi... <mailto:jas...@wi...>> wrote:
>
>
>     In the past few months some significant changes and cleanups occurred
>     on the kgdb sources.
>
>     Most notable changes:
>     - The SMP lock and entry routines were re-written
>     - kgdb_handle_exception() was broken down into a number
>      sub functions.
>     - The kgdb long jmp handlers have been removed
>     - The long jmp code was replaced with kernel_probe memory functions
>     - The kernel trap hooks are registered dynamically, only when
>      a kgdb I/O driver is configured
>     - kgdboc was introduced kgdb over console
>       * Implementation for the 8250, cpm, mpsc, and pl011 uarts available
>     - The kgdb8250 driver was rewritten and the add_port() functions
>     are gone
>     - There is a kgdb test suite to help validate the kgdb internals and
>      for aiding in the validation of new arch specific support.
>     - Many defects were fixed related to SMP races and other problems
>     - Module debugging section information is organized differently
>      this means the old gdbmod floating around no longer works.
>
>
>     Chunks of kgdb dropped:
>     - The sh architecture specific implementation was not carried forward
>     - The ia64 architecture specific implementation was not carried
>     forward
>     - The mips and ppc kgdb specific rs232 drivers were not carried
>     forward
>
>     All of the pieces that were dropped were due to the lack of hardware
>     to test and design on.  I can try to field questions about how to port
>     these pieces to the new design for those folks who have this hardware
>     and are interested in contributing to kgdb.  I would recommend first
>     looking at the drivers/serial/8250_kgdb.c as an example.
>
>
>     The kgdb documentation was rewritten and available at:
>     http://kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb/
>
>     There is a tree for the 2.6.24 kernel at:
>     http://git.kernel.org/?p=linux/kernel/git/jwessel/linux-2.6-kgdb.git;a=shortlog;h=kgdb_2.6.24
>
>     There is a tree for the 2.6.25-rcX kernel at:
>     http://git.kernel.org/?p=linux/kernel/git/jwessel/linux-2.6-kgdb.git;a=shortlog;h=kgdb-next
>
>
>     For the 2.6.26 development cycle a subset of the kgdb changes are
>     being submitted for a merge, which you can find at:
>     http://git.kernel.org/?p=linux/kernel/git/jwessel/linux-2.6-kgdb.git;a=shortlog;h=kgdb-next
>
>     Also it is reasonably likely that the Source Forge cvs server will
>     no longer be used to house the kgdb development going forward.  At
>     this point all the current development trees live at kernel.org
>     <http://kernel.org>.
>
>     Thanks,
>     Jason.
>
>     -------------------------------------------------------------------------
>     Check out the new SourceForge.net Marketplace.
>     It's the best place to buy or sell services for
>     just about anything Open Source.
>     http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace
>     _______________________________________________
>     Kgdb-bugreport mailing list
>     Kgd...@li...
>     <mailto:Kgd...@li...>
>     https://lists.sourceforge.net/lists/listinfo/kgdb-bugreport
>
>
>
>
> -- 
> Milind Dumbare
> Sr. Systems Engg.
> Linsyssoft Technologies.