June 2007 - Darwin-kernel - lists.apple.com

CGDisplayBaseAddress at kernel?
by rohit dhamija 21 Jun '07

21 Jun '07

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Build Procedure for x86
by Joel Beaudoin 21 Jun '07

21 Jun '07

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Kauth stability? (kernel panic)
by Greg 21 Jun '07

21 Jun '07

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com Thanks! - Greg _______________________________________________ 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 experiencing a strange kernel panic and I can't figure out why it's happening. This is what happened: I have my vnode listener set to deny access to a certain file. I created a shell script that attempted to copy this file to another location many times (each time it would get a "permission denied" error because the listener was set to reject it). After running this script several times rather quickly, I then clicked on another terminal window and tried to launch 'top' to see how much CPU the kernel was taking up. The second I attempted to run top the system kernel panicked and on my development machine (which was attached during this entire time) just gave me this backtrace in gdb: Program received signal SIGTRAP, Trace/breakpoint trap. 0x002ff4ac in pe_run_clock_test () (gdb) bt #0 0x002ff4ac in pe_run_clock_test () #1 0x002ff498 in pe_run_clock_test () Previous frame identical to this frame (gdb could not unwind past this frame) Any clues as to why this is happening? I'm not really doing much in the vnode listener right now and generally that code runs fine, just sometimes in intense situations like this it kernel panics. Is this my fault or could there be a stability issue in 10.4.9's kauth stuff (on PPC)? This email sent to site_archiver(a)lists.apple.com

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Getting vnode from filename?
by Greg 21 Jun '07

21 Jun '07

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com Thanks for any help! - Greg _______________________________________________ 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.… Is there a way to get a vnode_t object from a filename? There seems to be zero documentation on this, and the header file (vnode.h) is not very helpful. There is an interesting sounding function called "vnode_lookup" that I found in there, but I can't find any documentation on how to use it. The reason I want to do this is because I'd like to deal with vnodes instead of filenames so that I can handle symbolic links to the file as well. This email sent to site_archiver(a)lists.apple.com

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Re: CFShow equivalent?
by Herb Petschauer 19 Jun '07

19 Jun '07

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CFShow equivalent?
by Eric Long 19 Jun '07

19 Jun '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thread-index: Aceytgm1SEUU9B6pEdyD+gAX8si2KA== Thread-topic: CFShow equivalent? User-agent: Microsoft-Entourage/11.3.2.061213 Is there an equivalent to CFShow() available in the kernel for OSObjects? Eric _______________________________________________ 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: How to detect Mac OS X version from a kext
by Bhavesh Davda 18 Jun '07

18 Jun '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=UJNEVtN5ozauPe/58w/1oYbWrdF2L8VUk2bRpWE2Oz2yyRaiwKnUqptuPuTdtuipcgvYXGIOjpmMAdRAz1Z1R63htG57INO1HMxhpMnkFidGFE4l6UHeS/onQnMBzPYMP1veB+nUT22KnQwAJ4wdAAXl8rw7JTsCbpUYXT5Jtrg= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=qDELXa5QajYSqjNjdHddDNKYdvIviAh+JrGKU9NQOB1pM4NZJzBng60NkNQiD3yt8HX+VBgJAnQ26LdlYeFhnBwtbuLr2QUPi2N6j7p24AHR+Lzrxy5WeAAQXDajLyavk/vQoQer4zyoQKYEI5r9rbbJUDhGBT9f4hJv5o7822s= FYI: browsing the xnu code, I found a simple way to determine the major version of the kernel: from libkern/version.h: extern const int version_major; So I guess I can simply check if (version_major == 8), then it must be Tiger. So never mind, I've finally answered my original question. Thanks > Irritatingly, the thing that you most want - the kmod version for the > symbol set(s) against which you are matched - is not easy to get. > The kmod_info struct that is passed to your kmod_start routine > contains a list of kmod references which would include the kernel > symbol sets against which you're linked, but if you're an I/O Kit > kext I don't think this is readily available because Xcode is > generating this function for you magically behind the scenes. So I don't have that problem because I'm not an I/O Kit kext. I'm a direct KPI user. > (Am I missing something here, folks? I couldn't find a public > interface to fetch the kmod_info data except via invoking kextstat, > which doesn't work well for kernel mode consumers...) Just to be clear where you're going with this. Are you suggesting that I walk the list of kmod_info structs passed to my start routine? > This number is your best bet; the major digit has consistenly been > bumped at each major OS release. You will want to get confirmation > from DTS (Garth?), but it seems reasonable to assume that as Panther > was 7.x and Tiger was 8.x that Leopard will be 9.x. If someone at Apple can confirm this, I'll gladly use the utsname major number 9 to mean Leopard. That's indeed sounding like my best option. Thanks! -- Bhavesh P. Davda -- Bhavesh P. Davda _______________________________________________ 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.… On 6/17/07, Bhavesh Davda <bhavesh.davda(a)gmail.com> wrote: This email sent to site_archiver(a)lists.apple.com

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Re: How to detect Mac OS X version from a kext
by Bhavesh Davda 18 Jun '07

18 Jun '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=AFRLDSuwWkDDTxYBop7Vx4CK+gkfAWMhDmQvnNnx9QKKmV3uMCRRrAznnAd88qr+nZYplfkQ2gvT1wGmKjPfsFJkILHW2ilVtKpCQ4IouA5y57jbNNmnWm5qfsgSw/+MHPVJJUWiYdHewod29YkKvSvP1y8UDniDn4N6p0+H/fE= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=c+nGQ1ONPK6tN45mzsb49QGV47ZUNclmSNdOXN1emhSoIAnol039E4zBV2aPF9f1EEpzv585krMZuDDzs6Cp/sxdzDz90ux74xCMJDm2Gcz+OaFxpNLyZDDL6BkJnPrTw/Nu7B76wPlg7LIeD7C231P4hCDscT0xD9bIpGa0s+o= Irritatingly, the thing that you most want - the kmod version for the symbol set(s) against which you are matched - is not easy to get. The kmod_info struct that is passed to your kmod_start routine contains a list of kmod references which would include the kernel symbol sets against which you're linked, but if you're an I/O Kit kext I don't think this is readily available because Xcode is generating this function for you magically behind the scenes. So I don't have that problem because I'm not an I/O Kit kext. I'm a direct KPI user. (Am I missing something here, folks? I couldn't find a public interface to fetch the kmod_info data except via invoking kextstat, which doesn't work well for kernel mode consumers...) Just to be clear where you're going with this. Are you suggesting that I walk the list of kmod_info structs passed to my start routine? This number is your best bet; the major digit has consistenly been bumped at each major OS release. You will want to get confirmation from DTS (Garth?), but it seems reasonable to assume that as Panther was 7.x and Tiger was 8.x that Leopard will be 9.x. If someone at Apple can confirm this, I'll gladly use the utsname major number 9 to mean Leopard. That's indeed sounding like my best option. Thanks! -- Bhavesh P. Davda _______________________________________________ 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: How to detect Mac OS X version from a kext
by Tony Scaminaci 17 Jun '07

17 Jun '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=Received:X-YMail-OSG:Mime-Version:In-Reply-To:References:Content-Type:Message-Id:Content-Transfer-Encoding:From:Subject:Date:To:X-Mailer; b=I+hnT6UPz3y17EI43jJ9r4lpOUSIPU6FxHs6Mq/po4G6E+yNYGtyrd+0SwTiu260TNee6wyysDDhy2KwxtdRnfLnWp4EIZ7kksfElQoNoicexqo6y48aCweDMBF6qNJ7P6OaxBm7PmKk/Fbdy+H9eZ0p3NNh89LvR30M4MswXWI= ; Tony On Jun 17, 2007, at 1:46 PM, Michael Smith wrote: This is a marketing number. = Mike _______________________________________________ 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.… Sounds like a job for a sysctl call. If you truly only care whether it's Leopard or Tiger, than just do a sysctl call to find out the OS version. If it comes out 10.5.x, it's Leopard. I don't know what versioning scheme Apple uses for the OS (10.4.9) versus the xnu kernel (792.18.5) This is related to build and branch activity within the development organisation. versus the utsname (8.9.1). Hence the question. This number is your best bet; the major digit has consistenly been bumped at each major OS release. You will want to get confirmation from DTS (Garth?), but it seems reasonable to assume that as Panther was 7.x and Tiger was 8.x that Leopard will be 9.x. Assuming you don't care about folks running old Leopard kernels (prior to the fix), then that's easy enough to implement. _______________________________________________ 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/friskythecat% 40sbcglobal.net This email sent to friskythecat(a)sbcglobal.net This email sent to site_archiver(a)lists.apple.com

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Re: IOKit KEXT Won't Load If Start Code Tries to Attach and Register?
by Quinn 17 Jun '07

17 Jun '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com 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 22:38 -0400 12/6/07, Chase Colman wrote: How would I go about sleeping in a kernel extension? You have a bunch of choices but if you're already knee deep in I/O Kit your best bet is IOSleep (declared in <IOKit/IOLib.h>). This email sent to site_archiver(a)lists.apple.com

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