Date: Sun, 03 Apr 2011 09:58:34 +0200 From: Andreas Tobler <andreast@FreeBSD.org> To: freebsd-hackers@FreeBSD.org Subject: kernel dumps on powerpc/pmap questions Message-ID: <4D9828AA.3030206@FreeBSD.org>
next in thread | raw e-mail | index | archive | help
Hello all, to investigate a system lockup I need to implement kerneldumps on powerpc. Well, exactly on PowerMacs. The booke should already support this feature. Right now I'm at the point where I can dump something, means the mechanism to be able to get a (core) dump for example via 'call doadump' in db works. I can restore the dump via savecore. I took the approach from booke and implemented the necessary functions for PowerMacs. But here I'm offline. I do not understand what I want to dump, means which part of the memory. Once I know what to dump, where do I find the information, which addresses? How can I get a picture of the memory organization form powermacs? Is there a pointer available about pmap in the kernel to find out a bit more on this topic? What is really needed to be able to run kgdb on a core file to be able to find where the kernel crashed? I know the questions are a bit vague, but I need an entry point. I appreciate any pointer to implement this feature. Tia, Andreas
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4D9828AA.3030206>