October 2004 - Darwin-kernel

Re: startup context: Same player, do not shoot again?
by Quinn 15 Oct '04

15 Oct '04

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 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 15:44 +0200 15/10/04, stephane sudre wrote: Does this mean that as soon as you stop your daemon, you have no way to relaunch it in the startup context? Most of Apple's daemons are BSD based, and thus don't really care what Mach bootstrap port namespace they launch in. Which ways are the not recommended to start in the startup context? The one I'd recommend, especially for relaunching a daemon, is "/usr/libexec/StartupItemContext" <x-man-page://8/StartupItemContext>. This email sent to site_archiver(a)lists.apple.com

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ld error
by Hervé Kergourlay 15 Oct '04

15 Oct '04

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.2; fr-FR; rv:1.0.2) Gecko/ 20030208 Netscape/7.02 the following link line doesn't work on MAC OS X 10.3 ?? -single_module is used with -dylib !! is it a ld bug ? hervé -- _______________________________________________________________________ Hervé Kergourlay Only those who attempt the absurd can achieve the impossible. _______________________________________________________________________ _______________________________________________ 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.… /usr/bin/ld -dylib -single_module -flat_namespace -undefiined suppress /usr/lib/dylib1.o -o mylib.dylib obj1.o obj2.o ld: -single_module ou -multiple_module flags can only be used when -dylib is also specified This email sent to site_archiver(a)lists.apple.com

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startup context: Same player, do not shoot again?
by stephane sudre 15 Oct '04

15 Oct '04

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Which ways are the not recommended to start in the startup context? _______________________________________________ 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.… According to http://developer.apple.com/documentation/Darwin/Conceptual/ KernelProgramming/contexts/chapter_9_section_3.html#//apple_ref/doc/ uid/TP30000905-CH212-TPXREF109: "There are a number of ways to force a program to start in the startup context without rebooting or using ssh. However, these are not robust solutions, and are not recommended. A standard API for starting daemons is under consideration. When an official API becomes available, this chapter will be updated to discuss it." Does this mean that as soon as you stop your daemon, you have no way to relaunch it in the startup context? This email sent to site_archiver(a)lists.apple.com

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Re: pmap_unnest: Other processor did not see interruption request
by David Gatwood 14 Oct '04

14 Oct '04

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Oct 14, 2004, at 6:58 AM, Parav Pandit wrote: -----Original Message----- From: David Gatwood [mailto:dgatwood@apple.com] Sent: Tuesday, October 12, 2004 1:17 AM To: Parav Pandit Cc: darwin-kernel(a)lists.apple.com Subject: Re: pmap_unnest: Other processor did not see interruption request On Oct 9, 2004, at 6:57 AM, Parav Pandit wrote: Let me give you more idea about my driver during loading phase: It does the following steps in sequence: It first enables the memory mapped io for PCI card's register file.( I have 256 registers) Enables the PCI bus mastering, disables the Option ROM on the card. I have to do that) Some memory mapped read/write operation on the PCI card to reset the card -------------------------------------------- Here is the problem, if I don't execute my chip reset function, and completes my start(), there is no panic. But it is really very strange. My chip_reset() does it: Disable interrupts Do PCI IO regs. IODelay() to wait to complete reset... Enable interrupts. I'd make sure that it calls the IOSimpleLockUnlockEnableInterrupt() to enable interrupts. I can't really understand that what it pmap_unnest between 2 processors during driver loading phase? David _______________________________________________ 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 use the IOSimpleLockLockDisableInterrupt() IOSimpleLockUnlockEnableInterrupt() for my critical section. They are needed, if during working after loading my PCI card hangs, I use the same reset function. pmap_unnest can be called at any time. It occurs frequently as part of the normal mapping and unmapping of memory. The pmap_unnest is probably completely unrelated to your driver. and just happens to occur at about the same time. The problem is that, for whatever reason, your driver seems to be holding interrupts off for several seconds. It is generally unsafe to disable interrupts for more than a few microseconds, as holding interrupts for longer can cause anything from a kernel panic to your computer shutting itself off or rebooting. If a pmap_unnest occurs in some other part of the OS while interrupts are off for more than a few seconds, you will get a kernel panic. If at all possible, you should replace the IOSimpleLock with an IOLock (mutex). That would still prevent multiple resets happening concurrently. If you need to ignore device interrupts during a reset, you should either set a flag in your driver to tell your interrupt handler to ignore interrupts or you should disable that particular interrupt event source temporarily. If the reason you are disabling interrupts is that the reset routine is timing-critical, you'll have to keep using IOSimpleLocks, but you should use IOSimpleLockLock instead of IOSimpleLockLockDisableInterrupt. By doing that, preemption is still disabled, but interrupts can occur so that the OS doesn't lobotomize itself. This email sent to site_archiver(a)lists.apple.com

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RE: pmap_unnest: Other processor did not see interruption request
by Parav Pandit 14 Oct '04

14 Oct '04

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Importance: Normal -----Original Message----- From: David Gatwood [mailto:dgatwood@apple.com] Sent: Tuesday, October 12, 2004 1:17 AM To: Parav Pandit Cc: darwin-kernel(a)lists.apple.com Subject: Re: pmap_unnest: Other processor did not see interruption request On Oct 9, 2004, at 6:57 AM, Parav Pandit wrote: > Let me give you more idea about my driver during loading phase: > It does the following steps in sequence: > > It first enables the memory mapped io for PCI card's register file.( I > have > 256 registers) > Enables the PCI bus mastering, disables the Option ROM on the card. > I have > to do that) > Some memory mapped read/write operation on the PCI card to reset the > card -------------------------------------------- Here is the problem, if I don't execute my chip reset function, and completes my start(), there is no panic. But it is really very strange. My chip_reset() does it: Disable interrupts Do PCI IO regs. IODelay() to wait to complete reset... Enable interrupts. I'd make sure that it calls the IOSimpleLockUnlockEnableInterrupt() to enable interrupts. I use the IOSimpleLockLockDisableInterrupt() IOSimpleLockUnlockEnableInterrupt() for my critical section. They are needed, if during working after loading my PCI card hangs, I use the same reset function. I can't really understand that what it pmap_unnest between 2 processors during driver loading phase? -------------------------------------------- > and processor on the Card. > All memory allocation goes here. > I can see IOLog message printed here. > (Up to here- all works fine) > After this message I get this kernel panic on pmap_unnest. >If you have your driver initialization stop right here, do you still >get a panic? >David Disclaimer: This e-mail and any attachment is for authorized use by the intended recipients only. It may contain proprietary material, confidential information and/or be subject to legal privilege of eInfochips Ltd. If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly prohibited from retaining, using, copying, altering or disclosing the contents of this message. _______________________________________________ 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: Kernel build problem...
by Haynes, Grady (PPC) 12 Oct '04

12 Oct '04

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thread-index: AcSwVum8sZjjQa34Qu+t/aWaxbjxLgAIkHlg Thread-topic: Kernel build problem... Also check out http://www.bur.st/~paul/compile_xnu.html. -----Original Message----- From: darwin-kernel-bounces+grady.haynes=thomson.com(a)lists.apple.com [mailto:darwin-kernel-bounces+grady.haynes=thomson.com@lists.apple.com] On Behalf Of Felix Kronlage Sent: Tuesday, October 12, 2004 7:27 AM To: Mark Woollard Cc: darwin-kernel(a)lists.apple.com Subject: Re: Kernel build problem... -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Oct 12, 2004, at 10:57 Uhr, Mark Woollard wrote: > Why am I getting: > /usr/bin/ld: Undefined symbols: > _kld_load_basefile_from_memory > _kld_set_link_options > When attempting to build the current kernel? This is my first attempt > at building any of the kernel releases so probably something obvious > I'm missing:-) Have you taken a look at the "Building XNU" howto over at OpenDarwin.org ? <url: http://www.opendarwin.org/en/articles/building_xnu/> It explains all necessary steps and also tells you how to install all needed dependencies. - -fkr - -- gpg-fingerprint: 076E 1E87 3E05 1C7F B1A0 8A48 0D31 9BD3 D9AC 74D0 http://fkr.hazardous.org | http://opendarwin.org/~fkr/ | FKR-RIPE -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (Darwin) iD8DBQFBa82ZDTGb09msdNARAo1dAJ9HLc9RzjWyMOVspYv87voNyBrSQwCfUh48 z6Pi8083Ahl9BHckFinaryk= =8ye+ -----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/grady.haynes%40thom son.com This email sent to grady.haynes(a)thomson.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: Kernel build problem...
by Felix Kronlage 12 Oct '04

12 Oct '04

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Oct 12, 2004, at 10:57 Uhr, Mark Woollard wrote: iD8DBQFBa82ZDTGb09msdNARAo1dAJ9HLc9RzjWyMOVspYv87voNyBrSQwCfUh48 z6Pi8083Ahl9BHckFinaryk= =8ye+ -----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.… Why am I getting: /usr/bin/ld: Undefined symbols: _kld_load_basefile_from_memory _kld_set_link_options When attempting to build the current kernel? This is my first attempt at building any of the kernel releases so probably something obvious I'm missing:-) Have you taken a look at the "Building XNU" howto over at OpenDarwin.org ? <url: http://www.opendarwin.org/en/articles/building_xnu/> It explains all necessary steps and also tells you how to install all needed dependencies. - -fkr - -- gpg-fingerprint: 076E 1E87 3E05 1C7F B1A0 8A48 0D31 9BD3 D9AC 74D0 http://fkr.hazardous.org | http://opendarwin.org/~fkr/ | FKR-RIPE -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (Darwin) This email sent to site_archiver(a)lists.apple.com

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Kernel build problem...
by Mark Woollard 12 Oct '04

12 Oct '04

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Why am I getting: /usr/bin/ld: Undefined symbols: _kld_load_basefile_from_memory _kld_set_link_options Regards Mark _______________________________________________ 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.… When attempting to build the current kernel? This is my first attempt at building any of the kernel releases so probably something obvious I'm missing:-) This email sent to site_archiver(a)lists.apple.com

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Re: NFDescriptor nf_handle
by Justin Walker 12 Oct '04

12 Oct '04

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Oct 10, 2004, at 22:46, Mark Woollard wrote: Yes and No :-} Regards, Justin -- /~\ The ASCII Justin C. Walker, Curmudgeon-at-Large \ / Ribbon Campaign X Help cure HTML Email / \ _______________________________________________ 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've been looking at NKEs and the examples I've seen set a value for the NFDescriptor nf_handle member. I can't find any docs on this but assume its a globally unique identifier for the NKE. If so, do I request a suitable value through the http://developer.apple.com/datatype/creatorcode.html page? Or am I off track here? This email sent to site_archiver(a)lists.apple.com

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Re: __private_extern__
by Godfrey van der Linden 11 Oct '04

11 Oct '04

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Godfrey On Oct 11, , at 8:21, stephane sudre wrote: On Oct 11, 2004, at 5:13 PM, Brian Bergstrand wrote: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Stephane, Are you assigning an initial value to the var definition in your.c file? If not, then the compiler will treat the definition as a declaration, and no storage will be allocated. .h __private_extern__ int foo; .c __private_extern__ int foo = 0; // Allocate storage for foo. 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/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.… One other thing to note, __private_extern__ does not work for C++ files and headers. That's definitely my case (no initial value). I would never have suspected this. This email sent to site_archiver(a)lists.apple.com

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