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RE: [Xen-devel] RE: produce windows compatible dump file from Dom0
Ah, you want to convert a save image. Kdd could be modified to talk to a save image rather than a live VM (which is something I want to do at some stage, but it’s way down my priority list). It would be kind of a shame to have to rely on something in the guest rather than a purely external solution (which kdd offers). Paul From: David Markey [mailto:admin@xxxxxxxxxxx] Sent: 08 November 2011 16:29 To: Paul Durrant Cc: Konrad Rzeszutek Wilk; James Harper; xen-devel@xxxxxxxxxxxxxxxxxxx Subject: Re: [Xen-devel] RE: produce windows compatible dump file from Dom0 Kdd is for live debugging,(I thought) I'm looking to specifically convert a VM save image(i,e, after suspend) into a WinDBG compatible image. It looked like the utility Konrad spoke of could have achieved this. On 8 November 2011 16:20, Paul Durrant <Paul.Durrant@xxxxxxxxxx> wrote: Can't this now be done using kdd?
Paul > -----Original Message----- > From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@xxxxxxxxxx] > Sent: 08 November 2011 15:41 > To: David Markey > Cc: James Harper; Paul Durrant; xen-devel@xxxxxxxxxxxxxxxxxxx > Subject: Re: [Xen-devel] RE: produce windows compatible dump file > from Dom0 >
> On Tue, Nov 08, 2011 at 03:15:10PM +0000, David Markey wrote: > > Hi Konrad, > > > > Sorry for resurrecting, > > Oh no trouble. > > > > Did "the guy" manage to get clearance to release the source for > this > > particular project? > > Uh, I think we lost track of this. Let me poke "the guy". > > > > > > > Thanks! > > > > David > > > > > > On 26 May 2011 13:52, Konrad Rzeszutek Wilk > <konrad.wilk@xxxxxxxxxx> wrote: > > > > > On Wed, May 25, 2011 at 10:16:06PM +1000, James Harper wrote: > > > > > > > > > > Hi all, > > > > > > > > > > Did anyone make any progress on this? > > > > > > > > > > I'm interested in getting a Windows memory dump out of a > > > > > XenServer > > > > suspend > > > > > image. > > > > > > > > > > Is it even remotely possible? > > > > > > > > > > > > > Yes. In order for it to work I believe the DomU needs to call > > > > KeInitializeCrashDumpHeader to place a crash dump header > inside > > > > the memory image (eg in NonPagedPool). > KeInitializeCrashDumpHeader > > > > is available in 2003sp1 and newer. You can then find that info > in > > > > the saved image and use it to build a windows compatible crash > > > > dump. There is more to it than that obviously and I haven't > > > > actually done it myself. Ideally it would be possible to do > 'xl > > > > wincrashdump -o memory.dmp domu_name' and have it all happen. > > > > > > > > I've BCC'd the guy who wrote a program to do it to see if he > can > > > > share it (hope he doesn't mind :) > > > > > > I am not "the guy", and while "the guy" is working on getting a > > > blanket OK to release the source (or executable), let me give > you > > > some of the technical details in case you feel inspired to write > this yourself. > > > > > > The process in making a dumpconverter involves finding the > windows > > > dump header in memory and putting it at the beginning of the > output > > > file, then taking the raw domain dump and writing it as is > except > > > that the following two ranges need to be skipped - which can > vary > > > from system to system: > > > 1) the ELF header (by default the first 6 pages of the raw > dump) > > > 2) a range which might be BIOS, which by default in the tool > is set to > > > pages 0x9F to 0xDF. > > > > > > Good luck! > > > |
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