September 2009 - Darwin-kernel

Error Loading Kernel
by Duane Murphy 23 Sep '09

23 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 I'm trying to work out what files have been corrupted to cause the error message at boot time: ...Mach-O file has bad magic number 0xfeedfacf Error loading kernel 'mach_kernel' (0x1) That's the message I get when booting from a newer MacBook Pro. On an older Mac Pro, there is an error message and a reboot so I am unable to read the error message as it flashes by. I do see the Mac Pro showing more than one row of dots as it is loading. (I've always assumed that each dot is a kext,) The corruption was caused by a disk driver that I am working on. I'd like to work out what the corruption is in order to diagnose the problem. Is there some way of determining which file has been corrupted? I replaced the mach_kernel file already so that's not it. I suspect that it's one of the kext. But I'm not sure how to determine if it is corrupted or which one is corrupted. I tried running "otool - h" on all of the files in MacOS directories, but they all seem to check out with a proper 0xfeedface. Is there some other options or some other tools that can help? Thanks for the help! ...Duane -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.10.0 (Build 500) Charset: US-ASCII wsBVAwUBSrmjwkrg9acQ4r2CAQiWBgf+LYt8ulg+3/i4wYmjlv6C3FtYBSwsF0G1 LlugU+oW5iczHN69yci5iLh3MaVkictq2aLt7H6R0mWGtgCQlxE1QvKcXxzsuRlg 2J0ToWTap0EocWSvWpK46Xloay1OGWJic+Z10+maXmPV+IutivjXp9BSKwIRJnao FqR+8oZguaNloFshk+aIB4ln1J8dHvzkHJ75MrekS6gqDy20DrdASoP0WuC169ht AYR0pmhUIoCFY93lMDx2LHQieuqdZ+GH52o18jjXbdYJ68Epgvx7g51e2AvGuIU9 hpYqTDo784Hyw/86M/FtrLexYiWLZ5Gde/mDP4Hlk7zWDBpw3ROqvA== =uq2j -----END PGP SIGNATURE----- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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RE: Hibernation
by Alexander Klyuev 21 Sep '09

21 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thread-index: Aco6x49E+cw/DkvTRTKT4UC934KPuQADlwTA Hi Niklas, >Niklas Hoglund wrote: >> When I try it in the kext where I want it to go, I still get an >> unresolved reference on __ZN17IOPolledInterface9metaClassE. I notice >> the working case links to __ZN17IOPolledInterface10metaClassE. I >> should be able to track that down by comparing differences between the >> projects. > Sorry to reply to myself, but I want to clarify now that I solved it. It turns out the two things that are linked to are IOPolledInterface::metaClass and IOPolledInterface::gMetaClass. > I didn't spot the difference in the mangled names. The former is not exported, as far as I > can see, but it is not used if I only subclass IOPolledInterface. It gets used if I try to do an OSDynamicCast to IOPolledInterface. Exactly. It's used only if you use OSDynamicCast. Unfortunately when we wanna use OSDynamicCast macro appropriate metaClass symbols are expected to be additionally required. Best, - Alexander _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/alexander.k%40winmagic. com This email sent to alexander.k(a)winmagic.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Hibernation
by Niklas Hoglund 21 Sep '09

21 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Thunderbird 2.0.0.23 (Windows/20090812) _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… Niklas Hoglund wrote: When I try it in the kext where I want it to go, I still get an unresolved reference on __ZN17IOPolledInterface9metaClassE. I notice the working case links to __ZN17IOPolledInterface10metaClassE. I should be able to track that down by comparing differences between the projects. Sorry to reply to myself, but I want to clarify now that I solved it. It turns out the two things that are linked to are IOPolledInterface::metaClass and IOPolledInterface::gMetaClass. I didn't spot the difference in the mangled names. The former is not exported, as far as I can see, but it is not used if I only subclass IOPolledInterface. It gets used if I try to do an OSDynamicCast to IOPolledInterface. This email sent to site_archiver(a)lists.apple.com

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Re: Hibernation
by Niklas Hoglund 21 Sep '09

21 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Thunderbird 2.0.0.23 (Windows/20090812) Hi Niklas, -- Thanks, Niklas _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… Alexander Klyuev wrote: I'm trying to implement a block driver that supports storing the hibernation file onto it. To do this, I need to subclass IOPolledInterface, as described in IOHibernateIO.cpp in the kernel, but I get unresolved references to its metaclass if I do. (__ZN17IOPolledInterface9metaClassE). I'm guessing this is because the symbol is in the _HIB section in the kernel. Any ideas? Actually I didn't have problems like yours. You're likely missing something. Thanks for that. You helped me look in the right place. I now have a trivial test kext that loads. When I try it in the kext where I want it to go, I still get an unresolved reference on __ZN17IOPolledInterface9metaClassE. I notice the working case links to __ZN17IOPolledInterface10metaClassE. I should be able to track that down by comparing differences between the projects. This email sent to site_archiver(a)lists.apple.com

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Re: Building a universal IOKit kext for 10.4 and up
by Ron Aldrich 18 Sep '09

18 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thanks, Quinn. Best Regards, Ron Aldrich Software Architects, Inc. On Sep 18, 2009, at 1:29 AM, Quinn wrote: <http://developer.apple.com/mac/library/technotes/tn2006/tn2163.html> _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… I filled in a feedback report requesting that the document be upgraded for 10.6. At 12:06 -0700 17/9/09, Ron Aldrich wrote: Is there a document that describes the proper build settings for such a beast? TN2163 hasn't yet been updated to cover 10.6, but it covers the earlier systems comprehensively. S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/ > Apple Developer Relations, Developer Technical Support, Core OS/ Hardware This email sent to site_archiver(a)lists.apple.com

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Re: Building a universal IOKit kext for 10.4 and up
by Ron Aldrich 18 Sep '09

18 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Building a universal IOKit kext for 10.4 and up
by Chris Suter 18 Sep '09

18 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Building a universal IOKit kext for 10.4 and up
by Chris Suter 18 Sep '09

18 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Building a universal IOKit kext for 10.4 and up
by Quinn 18 Sep '09

18 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com <http://developer.apple.com/mac/library/technotes/tn2006/tn2163.html> S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… At 12:06 -0700 17/9/09, Ron Aldrich wrote: Is there a document that describes the proper build settings for such a beast? TN2163 hasn't yet been updated to cover 10.6, but it covers the earlier systems comprehensively. This email sent to site_archiver(a)lists.apple.com

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Re: Hibernation
by Alexander Klyuev 18 Sep '09

18 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Organization: MusicLab, inc. Hi Niklas, YourPolledInterfaceClassName.h: class YourPolledInterfaceClassName : public IOPolledInterface { OSDeclareDefaultStructors(YourPolledInterfaceClassName) ... // all pure virtual functions should be overrided }; YourPolledInterfaceClassName.cpp: Generally that's it. Regards, - Alexander -- Niklas _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/klax%40musiclab.com This email sent to klax(a)musiclab.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… I'm trying to implement a block driver that supports storing the hibernation file onto it. To do this, I need to subclass IOPolledInterface, as described in IOHibernateIO.cpp in the kernel, but I get unresolved references to its metaclass if I do. (__ZN17IOPolledInterface9metaClassE). I'm guessing this is because the symbol is in the _HIB section in the kernel. Any ideas? Actually I didn't have problems like yours. You're likely missing something. IOPolledInterface class is fully exported by com.apple.kpi.iokit. Your class declaration/definition (if it's not intended to be abstract like IOPolledInterface) should look as follows: OSDefineMetaClassAndStructors(YourPolledInterfaceClassName, IOPolledInterface) ... // virtual functions implementation... // they will do whatever you want This email sent to site_archiver(a)lists.apple.com

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