February 2006 - Darwin-kernel

Re: ucontext
by Mike Smith 28 Feb '06

28 Feb '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Cyrus, = Mike On Feb 28, 2006, at 10:53 AM, Cyrus Harmon wrote: So clearly sys/uncontext.h exists on Darwin. The questions are: Cyrus On Feb 16, 2006, at 3:37 AM, Markus Hitter wrote: Am 16.02.2006 um 11:50 schrieb Steve Dekorte: This is a obsolete question for two reasons: 1) Apple never talks about future plans. Markus - - - - - - - - - - - - - - - - - - - Dipl. Ing. Markus Hitter http://www.jump-ing.de/ _______________________________________________ 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/drivers%40mu.org _______________________________________________ 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.… If you are interested in signal contexts from the perspective of handling hardware-initiated events (since things like the EIP are not very interesting for soft-generated signals), you should investigate mach exception handling rather than trying to do this with signals. Markus is correct; asking "are there plans to X" with regards to Apple is a pointless exercise. As he's suggested, your deeper discussion of your real needs may have prompted a better answer... 1) What are the differences between signal handling on PPC and X86? Is there a technote or other documentation that describes these differences? 2) What are the arguments that get passed to signal handlers? It seems that the first argument is a siginfo_t, and that the second is a ucontext_t, but what about intel? Clearly the machine context structures will have changed, but the header files are a maze of twisty ifdefs, all alike. On Intel, I can cast the third argument to a signal handler to a sigcontext, but it's not clear to me that the values are right if I do that. OTOH, if I try to cast this to a ucontext_t, as I was able to do on PPC, I get a complaint about this being an incomplete type. It's possible I'm doing something wrong or perhaps things have changed. A nice document describing how to get information like the value of the PC/EIP, would be rather handy. I don't see how this is any way "obsolete" or inappropriate for a mailing list about development using the Darwin kernel. Are there any plans to support ucontext on OSX? 2) If the sole purpose of your programming task is making use of "ucontext" (whatever this is), then you better choose a platform which supports it. Probably you have some higher goal in mind, so asking how to solve this might get you there more quickly. This email sent to drivers(a)mu.org This email sent to site_archiver(a)lists.apple.com

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Re: ucontext
by Cyrus Harmon 28 Feb '06

28 Feb '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com So clearly sys/uncontext.h exists on Darwin. The questions are: Cyrus On Feb 16, 2006, at 3:37 AM, Markus Hitter wrote: Am 16.02.2006 um 11:50 schrieb Steve Dekorte: This is a obsolete question for two reasons: 1) Apple never talks about future plans. Markus - - - - - - - - - - - - - - - - - - - Dipl. Ing. Markus Hitter http://www.jump-ing.de/ _______________________________________________ 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.… 1) What are the differences between signal handling on PPC and X86? Is there a technote or other documentation that describes these differences? 2) What are the arguments that get passed to signal handlers? It seems that the first argument is a siginfo_t, and that the second is a ucontext_t, but what about intel? Clearly the machine context structures will have changed, but the header files are a maze of twisty ifdefs, all alike. On Intel, I can cast the third argument to a signal handler to a sigcontext, but it's not clear to me that the values are right if I do that. OTOH, if I try to cast this to a ucontext_t, as I was able to do on PPC, I get a complaint about this being an incomplete type. It's possible I'm doing something wrong or perhaps things have changed. A nice document describing how to get information like the value of the PC/EIP, would be rather handy. I don't see how this is any way "obsolete" or inappropriate for a mailing list about development using the Darwin kernel. Are there any plans to support ucontext on OSX? 2) If the sole purpose of your programming task is making use of "ucontext" (whatever this is), then you better choose a platform which supports it. Probably you have some higher goal in mind, so asking how to solve this might get you there more quickly. This email sent to site_archiver(a)lists.apple.com

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Re: Can CMIs be dynamically loaded?
by Herb Petschauer 28 Feb '06

28 Feb '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; b=QRDNubI8Iqwq/Nxctq0zYsfXOdKLD8yV5NmvdgflbxDzcbzGQtD3npfJPO9mIHj8T47zHGzoSO6Ekj5PxWsYPuQ88HHAP5sm5xPU74QKoKZ4jXchau/jSBtvZY7rn1N+yD4lfA8HgiNOgAz8rkjZCfUjgIGTWUVXbAeBDszH+0Q= _______________________________________________ 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 create virtual COM port
by Mike Smith 28 Feb '06

28 Feb '06

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: VFS plug-in Mac OS X 10.4
by Quinn 28 Feb '06

28 Feb '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Is there any document which give me complete details about KPI interface used for developing vfs plug-in? This is discussed in depth in Q&A 1242 "Developing for VFS". <http://developer.apple.com/qa/qa2001/qa1242.html> <http://developer.apple.com/bugreporter/> 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/site_archiver%40lists.… At 10:35 +0530 28/2/06, Yogesh Pahilwan wrote: In short, there is currently no documentation for the VFS KPI. Feel free to write a bug report requesting this. [In general DTS asks developers to file their own bugs because it emphasises that the issue is affecting real developers. Also, it has the added benefit that you can track the bug's status yourself.] This email sent to site_archiver(a)lists.apple.com

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Re: How to create virtual COM port
by Mike Smith 28 Feb '06

28 Feb '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Feb 26, 2006, at 8:46 PM, Pavan Chebbi wrote: = 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.… I wanted to know how do we create and register a virtual COM port. (MAC OS X). What aspects of a true serial device do you need to emulate? Is it necessary to e.g. support the setting of line speed, modem control bits and the like? If not, you may find that the pseudo-tty (pty) interface is more than adequate for your needs. Is it possible at the user level or do we have to code in the kernel. Kindly provide some inputs on this. pty's can be manipulated entirely in user space. Typically, regular ttys are only backed by real hardware, and thus they need to be implemented in the kernel. Is there any open source that I can refer to which does the same job. Without knowing what it is that you are actually trying to achieve, it is difficult to know. Perhaps you could describe your application and how you intend to use this interface so that we can offer some more suggestions? This email sent to site_archiver(a)lists.apple.com

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VFS plug-in Mac OS X 10.4
by Yogesh Pahilwan 28 Feb '06

28 Feb '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Organization: Dear Folks, I want to write a vfs plug-in on Mac OS X 10.4. I come to know that Apple has supported vfs plug-in on Mac OS X 10.4 by using KPI. But when I search for documentation for KPI I come to know that the documentation is not complete. Is there any document which give me complete details about KPI interface used for developing vfs plug-in? Thanks & Regards, Yogesh _______________________________________________ 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 create virtual COM port
by Terry Lambert 28 Feb '06

28 Feb '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi All, Do you mean a serial port? If so, what do you mean by "virtual"? -- Terry _______________________________________________ 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 Feb 26, 2006, at 8:46 PM, Pavan Chebbi wrote: I wanted to know how do we create and register a virtual COM port. (MAC OS X). Is it possible at the user level or do we have to code in the kernel. Kindly provide some inputs on this. Is there any open source that I can refer to which does the same job. Depends on what you're intending to do with it, and how you expect it to actually work... This email sent to site_archiver(a)lists.apple.com

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Can CMIs be dynamically loaded?
by Allan Hoeltje 27 Feb '06

27 Feb '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Microsoft-Entourage/10.1.4.030702.0 Is it possible to dynamically load a Contextual Menu Item plug-in? The Apple documentation and other hits I've found via Goggle all say the same thing: drag the cmi.plugin to the contextual menu items folder and reboot or logout/login. I want my Cocoa application to have a check box in the preferences that enables/disables a custom CMI without requiring the user to logout. It just seems reasonable to expect this because kernel extensions have kextload, CMIs should have a cmiload! -Allan _______________________________________________ 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: probably a dumb question
by Josh Graessley 27 Feb '06

27 Feb '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com I believe that documentation is out of date or wrong. -josh On Feb 27, 2006, at 11:28 AM, David A Rowland wrote: The ipf_ functions will appear in com.apple.kpi.bsd. <key>com.apple.kpi.bsd</key> <string>8.0.0</string> _______________________________________________ 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 The com.apple.kernel.* kexts are the old style (pre-10.4) kexts. In 10.4, the symbol set kexts for the KPIs are com.apple.kpi.*. The com.apple.kernel.* kexts exist for compatibility with older drivers. Network kernel extensions required a rewrite for 10.4. You have to have the right dependencies declared in the OSBundleLibraries section of your kexts Info.plist. -josh Thank you. That got me past the problem. But it leads to a question, if you don't mind. In Apple's "Kernel Extension Concepts", page 88 it says that the header file "netinet.h" depends on com.apple.kernel.bsd and com.apple.kernel.mach only. The routines I used are defined in that header. How is one to know that the implementations lie elsewhere, and how does one find them? David smime.p7s

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