June 2006 - Darwin-kernel - lists.apple.com

open ("/dev/tty.xxxx"...) for my driver crashes the system
by Pavan Chebbi 27 Jun '06

27 Jun '06

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Re: kextunload problem
by Mark Stow 27 Jun '06

27 Jun '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com From: "Herb Petschauer" <bogvardi(a)gmail.com> To: "Mark Stow" <markstow(a)hotmail.com> CC: Darwin-kernel(a)lists.apple.com Subject: Re: kextunload problem Date: Mon, 26 Jun 2006 09:18:45 -0700 Hi - I'm having some difficulties with kextunload. I am working on a firewire device driver which derives from IOService. The problem seems to be that free() never gets called. However, if I log out, then log back in again, everything works fine - ie free() is called, and the driver unloads correctly. I have stripped the code down to a bare minimum of just the life cycle functions, which in turn just call into IOService. I see init(), attach() and start() being called, and then on unload stop() detach() but not free(). Any help/ideas would be appreciated! _______________________________________________ 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.… Herb, thanks. I have some more info - The system log tells me there is one instance of my class which is why it can't unload. It doesn't make any difference if the firewire device is plugged in or not. I tried overriding retain() and release(), and in both cases when kextunload fails or succeeds, release() seems to be called once more than retain(). I also noticed that if I delete the driver from system/library/extensions and reboot, so it's not loaded on boot, and then copy it back and kextload it, kextunload will succeed. If someone is over-retaining (and it seems to need to happen on bootup) wouldn't I see a difference in the retain() release() counts when unload fails? On 26/06/06, Mark Stow <markstow(a)hotmail.com> wrote: Check your system.log, there's probably a message telling you why your kext won't unload (e.g. Couldn't unload kext (name) because there are x instances of <some class>). free() doesn't get called until the last release() (retain/release must balance) so I suspect someone is over-retaining(). Is your Firewire drive unplugged when you try and unload the kext? The /dev/disk nodes are usually left created until you unplug the device. Just a thought... -H. _________________________________________________________________ Windows Live Messenger has arrived. Click here to download it for free! http://imagine-msn.com/messenger/launch80/?locale=en-gb This email sent to site_archiver(a)lists.apple.com

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Re: kextunload problem
by Herb Petschauer 26 Jun '06

26 Jun '06

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kextunload problem
by Mark Stow 26 Jun '06

26 Jun '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.… Hi - I'm having some difficulties with kextunload. I am working on a firewire device driver which derives from IOService. The problem seems to be that free() never gets called. However, if I log out, then log back in again, everything works fine - ie free() is called, and the driver unloads correctly. I have stripped the code down to a bare minimum of just the life cycle functions, which in turn just call into IOService. I see init(), attach() and start() being called, and then on unload stop() detach() but not free(). Any help/ideas would be appreciated! _________________________________________________________________ Windows Live Messenger has arrived. Click here to download it for free! http://imagine-msn.com/messenger/launch80/?locale=en-gb This email sent to site_archiver(a)lists.apple.com

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Re: Socket Filter NKE for both TCP and UDP
by Peter Lovell 26 Jun '06

26 Jun '06

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Re: not registry member at registerService()
by Pavan Chebbi 24 Jun '06

24 Jun '06

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Re: not registry member at registerService()
by Garth Cummings 23 Jun '06

23 Jun '06

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Re: sockets in kernel
by Vincent Lubet 23 Jun '06

23 Jun '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Jun 23, 2006, at 3:27 AM, sanjay yaragatti wrote: I am writing a kernel mode driver and want to use socket api’s for the same.Can I use the same socket calls such as socket(),connect(),accept() etc or there are some other API’s especially for kernel mode. Came across some file called as kpi_socket.h which has APS’s such as sock_sock(), sock_bind(),sock_connect() etc… Please let me know. Yes to use sockets in the kernel use the API in kpi_socket.h Vincent _______________________________________________ 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: not registry member at registerService()
by Terry Lambert 23 Jun '06

23 Jun '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com This might not be appropriate. In fact, it might not be appropriate to use an IOKit approach at all. -- Terry Hi John, 2. attach is more appropriate. http://developer.apple.com/documentation/DeviceDrivers/Conceptual/IOKitFund… Dan Le 23 Jun 2006 à 5:27 AM, John Dalgliesh a écrit : Hi All, I am writing a driver which creates virtual serial ports in /dev. Extract from doc for IORegistyEntry::attachToParent: "This is the usual method of entering an entry into the registry. " Thaks in advance, Pavan. {P^/ _______________________________________________ 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/markarian%40apple.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/tlambert%40apple.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.… Pavan appears to be trying to create a pseudo-device that looks like a serial port in /dev. We do this already with the xnu/bsd/kern/tty_pty.c driver, which is the pty device driver (and not an IOKit device driver). For an IOKit device driver, his problem isn't going to be writing the code, so much as it is getting the "Driver Matching and Loading" of the document that Dan references to actually trigger. There are a couple of ways to do this without real hardware, but Active matching isn't going to work, since there's no physically real unclaimed hardware that the driver is trying to talk to in order to trigger it. No trigger = no device node created. There don't seem to be any good references on writing IOKit pseudo- devices, other than the source code for several that we've published through OpenDarwin. On Jun 23, 2006, at 7:03 AM, Dan Markarian wrote: 2. attachToParent On Fri, 23 Jun 2006, Pavan Chebbi wrote: When I call registerService() on my object of class which is inherited from IOSerialStreamSync(), this is what the error is given as. How do you create those objects? Have you put them through all the usual states of an IOService/IORegistryEntry object? In brief this is: 1. init 2. attachToParent 3. start (4. usu from start: registerService) The docs in the IORegisterEntry.h and IOService.h files may be helpful (and there are probably even better docs about this lifecycle but I'm sure you can go and search for those yourself :) Requesting you to provide some pointers/reasons as to why this error is coming up because of which I am not able see the nodes created by my driver in /dev. This email sent to markarian(a)apple.com This email sent to tlambert(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Re: not registry member at registerService()
by John Dalgliesh 23 Jun '06

23 Jun '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi John, Oops however did I miss that obvious one! Thanks. Just fixed my own code :) {P^/ John _______________________________________________ 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 Fri, 23 Jun 2006, Dan Markarian wrote: 2. attachToParent 2. attach is more appropriate. http://developer.apple.com/documentation/DeviceDrivers/Conceptual/IOKitFund… Dan This email sent to site_archiver(a)lists.apple.com

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