May 2005 - Darwin-kernel - lists.apple.com

Filter graphics driver
by Anshul Makkar 25 May '05

25 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Mozilla Thunderbird 1.0.2 (Macintosh/20050317) _______________________________________________ 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.… hello , I have to write an application whether user space/kernel space that should filter the rendering that is being done on the screen , Now the flow that we understood is Aqua will generate the calls for Quartz and the further Quartz will generate calls for the underlying driver . Now the point we are unclear about is , what are these interface ie interface for communication between application and quartz and of between quartz and driver . Mac OS provides standard graphics family which export certain interfaces . Now OS has to generate calls for these interfaces , but these interfaces were never getting hit during the debugging. When we put break points in graphics kext , the break points were hit . But the functions that were being called for eg allocate_texture() etc t are not there in the standard graphics family. This led us to conclusion that these may be the private function of graphics kext . But OS doesnt know about the private functions of graphics kext , so how the calls are being routed to graphics kext private function ? How OS standard calls are being mapped to graphics kext private functions ?? This email sent to site_archiver(a)lists.apple.com

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Re: Will p_priority be broken?
by Godfrey van der Linden 24 May '05

24 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Godfrey On 05/23/2005, at 16:32 , Sam Vaughan wrote: Sam On 24/05/2005, at 5:05 AM, oramble(a)yahoo.com wrote: _sleep() { ... ... s = splhigh(); ... p->p_priority = pri & PRIMASK; ... } looks like splhigh() cannot protect p->p_priority from broken if current_proc() has two threads running in two different funnels, and they try to change priority at same time. _______________________________________________ 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/gvdl%40apple.com This email sent to gvdl(a)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.… Yup, this would be a problem indeed and thanks for pointing it out. It turns out, as Sam, pointed out the p_priority field in the struct proc isn't used at all anymore. We use a similar fields in the thread schedule stuff. The useless splhigh() and friends have been removed from Darwin 8 so I'm assuming you're referring to Darwin 7 xnu's kern_synch.c here. As far as I can tell, the p_priority flag isn't used anywhere else in the kernel, so this is a non-issue. Did you point this out just from code inspection or are you seeing odd behaviour when kernel network and file system threads sleep at the same time as each other? This email sent to site_archiver(a)lists.apple.com

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Tiger: ipfw2 and sysctl variables
by Brian Warsing 24 May '05

24 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Mutt/1.5.6i Reading the man page for ipfw, it suggests that in order for layer 2 filtering to occur, net.link.ether.ipfw must be enabled, but I don't see this variable is available. I know the man page is written for a FreeBSD, but why is this control and several other important ones, missing in the Darwin kernel? Can anyone explain? -- B. _______________________________________________ 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: Will p_priority be broken?
by Sam Vaughan 23 May '05

23 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Sam On 24/05/2005, at 5:05 AM, oramble(a)yahoo.com wrote: _sleep() { ... ... s = splhigh(); ... p->p_priority = pri & PRIMASK; ... } looks like splhigh() cannot protect p->p_priority from broken if current_proc() has two threads running in two different funnels, and they try to change priority at same time. _______________________________________________ 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.… The useless splhigh() and friends have been removed from Darwin 8 so I'm assuming you're referring to Darwin 7 xnu's kern_synch.c here. As far as I can tell, the p_priority flag isn't used anywhere else in the kernel, so this is a non-issue. Did you point this out just from code inspection or are you seeing odd behaviour when kernel network and file system threads sleep at the same time as each other? This email sent to site_archiver(a)lists.apple.com

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Will p_priority be broken?
by Ramble Leon 23 May '05

23 May '05

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=yahoo.com; b=yjtGyOoGLPsfyBehD35XaSNFjNsA7cpt1DZUlqrg0enhYN0JiwW2z8vh147M3G/La6BIath5AocZ35glHxe+60CNchzqGbNSZqmsSeS+T1z8P+JySaoz5Mi6ouCIl2H9hRdaxzHxQFX9lxlv7yWfylivFBbbZ1H2JYn/EU71Oak= ; _sleep() { ... ... s = splhigh(); ... p->p_priority = pri & PRIMASK; ... } looks like splhigh() cannot protect p->p_priority from broken if current_proc() has two threads running in two different funnels, and they try to change priority at same time. __________________________________ Yahoo! Mail Mobile Take Yahoo! Mail with you! Check email on your mobile phone. http://mobile.yahoo.com/learn/mail _______________________________________________ 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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Fwd: tcplognke - does it exist?
by Joshua Durham 22 May '05

22 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Here you go, Rob. - Josh Begin forwarded message: From: Quinn <eskimo1(a)apple.com> Date: May 18, 2005 8:16:36 AM EDT To: darwin-kernel(a)lists.apple.com Subject: Re: tcplognke - does it exist? At 13:04 +0100 18/5/05, Mark Woollard wrote: This email sent to joshdurham(a)mac.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 A NKE example tcplognke is mentioned in the Tiger docs for NKE development as shipped with Xcode 2.0 but I can't find it. Where can I get the example source? It's currently being reviewed internally at Apple. If you write to <dts(a)apple.com>, we'll send you a draft copy. S+E -- Quinn "The Eskimo!" <http://www.apple.com/ developer/> Apple Developer Technical Support * Networking, Communications, 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/joshdurham% 40mac.com smime.p7s

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tcplognke - does it exist?
by Rob W 22 May '05

22 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com I would like to get the tcplognke example code that is mentioned in the NKE doc. I apologize for asking the same question that was asked and answered just a few days ago, but I just joined the list. If I could find a way to get the email address that Quinn posted from the archives, I would. So, Quinn, would you please post the email address again? Thank you, Rob Yahoo! Mail Stay connected, organized, and protected. Take the tour: http://tour.mail.yahoo.com/mailtour.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.… This email sent to site_archiver(a)lists.apple.com

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Re: Changes to sys/sockio.h
by Justin Walker 19 May '05

19 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On May 18, 2005, at 17:20, Joe Ridge wrote: Thanks. Yup. Cheers, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- If you're not confused, You're not paying attention -------- _______________________________________________ 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.… So, If I compile cfengine against a sys/sockio.h that doesn't have the definitions removed then the resulting program should run as well as it did in previous versions of OS X because if the program ever actually went to use SIOCADDRT, it would fail because the ioctl is not implemented? This email sent to site_archiver(a)lists.apple.com

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Re: Changes to sys/sockio.h
by Joe Ridge 19 May '05

19 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thanks. On May 18, 2005, at 8:14 PM, Josh Graessley wrote: -josh On May 18, 2005, at 5:06 PM, Joe Ridge wrote: Hi, sorry if this is the wrong list for this sort of inquiry. This email sent to jgraessley(a)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.… So, If I compile cfengine against a sys/sockio.h that doesn't have the definitions removed then the resulting program should run as well as it did in previous versions of OS X because if the program ever actually went to use SIOCADDRT, it would fail because the ioctl is not implemented? Those ioctls are not implemented on Mac OS X. They weren't implemented in 10.3 (and probably earlier releases too). The effective removal from the headers reflects the fact that those ioctls are not implemented on Mac OS X. In the sys/sockio.h that ships with 10.4, which is Darwin 8.0.0, the definitions for SIOCADDRT and SIOCDELRT have been wrapped in an #if 0 conditional, basically removing them from the file. I was wondering what the significance of this was? I've got some code I am trying to build, cfengine, and it uses SIOCADDRT, so I need to figure out how to approach this. Any input that any of you can give would be greatly appreciated. Thanks! _______________________________________________ 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/jgraessley% 40apple.com This email sent to site_archiver(a)lists.apple.com

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Re: Changes to sys/sockio.h
by Justin Walker 19 May '05

19 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On May 18, 2005, at 17:06, Joe Ridge wrote: This is the appropriate list. Of course, since I'm not inside Apple, I can only speculate :-} Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- "Weaseling out of things is what separates us from the animals. Well, except the weasel." - Homer J Simpson -------- _______________________________________________ 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.… Hi, sorry if this is the wrong list for this sort of inquiry. In the sys/sockio.h that ships with 10.4, which is Darwin 8.0.0, the definitions for SIOCADDRT and SIOCDELRT have been wrapped in an #if 0 conditional, basically removing them from the file. I was wondering what the significance of this was? I've got some code I am trying to build, cfengine, and it uses SIOCADDRT, so I need to figure out how to approach this. >From a quick check of previous darwin/xnu source drops, it appears that the significance is removal of unused ioctl commands. This one does not seem to be used within the kernel. This email sent to site_archiver(a)lists.apple.com

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