March 2002 - Darwin-kernel - lists.apple.com

HFS+ lockup with xnu-201.19 (OSX 10.1.3)
by Chris Bednar 31 Mar '02

31 Mar '02

Hi Since I upgraded to xnu-201.19 with OSX 10.1.3, I've been experiencing what looks like a lockup in HFS+. This happens while writing a file; at some point, most attempts to acces the FS involved hang forever (`ls' works, but not `ls -s'). I thought it might be a hardware problem with the IDE disk I was using then it first happened, but I get the same behaviour with a FireWire drive. Actually, I just tried xnu-201.5, and I see the same problem, so it may be happening in an extension... this never happened before the 10.1.3 upgrade. Not sure what info is useful, but I'm including the output of `kmodstat' (with xnu-201.19) in case it rings a bell. Incidentally, what I'm actually doing is exporting DV from iMovie, so a lot of basic I/O. If I'm using an IDE disk, I eventually hear a lot of interesting sounds come out of the disk, and the process gets an error; on FireWire, it just hangs forever. Any ideas? ---- Chris J. Bednar Director, Distributed Computing Product Group http://AdvancedDataSolutions.com/ kmodstat output: Id Refs Address Size Wired Name (Version) <Linked Against> 1 3 0x0 0x0 0x0 com.apple.kernel (5.3) 2 10 0x0 0x0 0x0 com.apple.kernel.bsd (5.3) 3 33 0x0 0x0 0x0 com.apple.kernel.iokit (5.3) 4 32 0x0 0x0 0x0 com.apple.kernel.libkern (5.3) 5 22 0x0 0x0 0x0 com.apple.kernel.mach (5.3) 6 1 0x0 0x0 0x0 com.apple.iokit.IOADBFamily (1.1) 7 1 0x0 0x0 0x0 com.apple.iokit.IOSystemManagementFamily (1.1) 8 8 0x1edae000 0x8000 0x7000 com.apple.iokit.IOPCIFamily (1.1) <3 4> 9 0 0x1edd8000 0xa000 0x9000 com.apple.driver.AppleCore99PE (1.1d4) <8 5 3 4> 12 2 0x1ee59000 0x16000 0x15000 com.apple.iokit.IOGraphicsFamily (1.1.1) <8 3 4> 13 2 0x1ee97000 0x17000 0x16000 com.apple.iokit.IOHIDSystem (1.1.1) <3> 14 0 0x1eebd000 0x3000 0x2000 com.apple.driver.AppleCore99NVRAM (1.1) <3 4 5> 15 0 0x1eed9000 0x5000 0x4000 com.apple.driver.AppleMacRiscPCI (1.1) <8 2 5 3 4> 16 1 0x1ef4b000 0x13000 0x12000 com.apple.iokit.IONDRVSupport (1.1.1) <12 8 3 4> 17 0 0x1ef6a000 0x8000 0x7000 com.apple.driver.AppleKeyLargo (1.1.5d1) <3 4 5> 18 0 0x1eff9000 0x3000 0x2000 com.apple.driver.AppleMPIC (1.1) <3 4 5> 19 0 0x1f006000 0x4000 0x3000 com.apple.driver.AppleVIA (1.1) <3 4 5> 21 3 0x1f033000 0xe000 0xd000 com.apple.iokit.IOATAFamily (1.4.9f1) <3 4> 22 0 0x1f054000 0x3000 0x2000 com.apple.driver.KeyLargoATA (1.0.8f3) <21 3 4> 23 6 0x1f085000 0x16000 0x15000 com.apple.iokit.IOUSBFamily (1.8.7) <3 4 5> 24 0 0x1f0c3000 0x9000 0x8000 com.apple.driver.AppleUSBOHCI (1.8.7) <8 23 3 4 5> 25 0 0x1f0fa000 0x16000 0x15000 com.apple.driver.ApplePMU (1.2.4d1) <3 4 5> 26 0 0x1f131000 0x8000 0x7000 com.apple.driver.AppleUSBHub (1.8.7) <23 3 4 5> 27 5 0x1f156000 0x10000 0xf000 com.apple.iokit.IOSCSIArchitectureModelFamily (1.1.3) <3 4 5> 28 0 0x1f18c000 0x5000 0x4000 com.apple.iokit.IOATAPIProtocolTransport (1.1.1) <21 27 3 4 5> 29 6 0x1f1be000 0x16000 0x15000 com.apple.iokit.IOStorageFamily (1.1.2) <2 3 4> 30 0 0x1f206000 0x7000 0x6000 com.apple.iokit.IOATABlockStorage (1.1.1) <21 29 2 3 4> 31 5 0x1f264000 0x2d000 0x2c000 com.apple.iokit.IOFireWireFamily (1.1.2d43) <3 4> 32 0 0x1f2f2000 0xf000 0xe000 com.apple.driver.AppleFWOHCI (1.1.2d24) <31 8 3 4> 33 1 0x1f367000 0x1a000 0x19000 com.apple.iokit.IONetworkingFamily (1.1) <1> 34 0 0x1f3b0000 0x8000 0x7000 com.apple.iokit.AppleGMACEthernet (1.1.8) <33 8 2 5 1 3 4> 35 2 0x1f5ed000 0xb000 0xa000 com.apple.iokit.IOCDStorageFamily (1.1.3) <29 5 2 3 4> 36 1 0x1f63a000 0xd000 0xc000 com.apple.iokit.IOSCSIBlockCommandsDevice (1.1.3) <27 29 5 2 3 4> 37 1 0x1f675000 0x6000 0x5000 com.apple.iokit.IODVDStorageFamily (1.1) <35 29 5 2 3 4> 38 0 0x1f6fc000 0x16000 0x15000 com.apple.iokit.IOSCSIMultimediaCommandsDevice (1.1.3) <37 36 35 27 29 5 2 3 4> 39 0 0x1f742000 0x7000 0x6000 com.apple.iokit.SCSITaskUserClient (1.1.3) <27 29 5 2 3 4> 40 0 0x1f760000 0x3000 0x2000 com.apple.driver.AppleUSBComposite (1.8.7) <23 3 4 5> 42 1 0x1f7c2000 0x13000 0x12000 com.apple.iokit.IOFireWireSBP2 (1.1.2d24) <31 3 4> 43 0 0x1f804000 0x5000 0x4000 com.apple.driver.AppleUSBKeyboard (1.8.7) <13 23 3 4 5> 44 0 0x1f859000 0x4000 0x3000 com.apple.iokit.IOFireWireSerialBusProtocolTransport (1.1.0) <42 27 31 5 3 4> 46 1 0x1ed28000 0xa000 0x9000 com.apple.iokit.IOSerialFamily (5.3.0d14) 48 0 0x1ed66000 0x25000 0x24000 com.apple.ATIRage128 (1.1) <8 12 16> 49 1 0x1ed43000 0x7000 0x6000 com.apple.iokit.IOFireWireAVC (1.1.2) <31> 50 0 0x1ed4e000 0x9000 0x8000 com.apple.iokit.IOUSBUserClient (1.8.8) <23> 53 0 0x1ed94000 0xb000 0xa000 com.apple.driver.AppleSCCSerial (1.2.1) <46> 54 0 0x1ed9f000 0x4000 0x3000 com.apple.driver.AppleI2C (1.0.1d3) 55 3 0x1ee14000 0x1a000 0x19000 com.apple.iokit.IOAudioFamily (1.1fc9) 56 2 0x1edbd000 0x5000 0x4000 com.apple.driver.AppleDBDMAAudio (1.7.2d3) <55> 59 0 0x1ee2e000 0x8000 0x7000 com.apple.driver.IOFireWireDV (1.1.1d24) <31 49> 60 0 0x1edc9000 0x4000 0x3000 com.apple.driver.AppleUSBMouse (1.8.8) <13 23> 61 1 0x1ee36000 0xe000 0xd000 com.apple.driver.AppleOnboardAudio (1.7.2d3) <55 56> 62 0 0x1ede9000 0x4000 0x3000 com.apple.driver.AppleScreamerAudio (1.7.2d2) <55 56 61> 64 0 0x1f017000 0x6000 0x5000 com.apple.nke.SharedIP (1.1) 65 0 0x1f00c000 0x4000 0x3000 com.apple.nke.IPFirewall (1.1) _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. 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Re: Linking to standard libs in building a KEXT
by Frode Isaksen 29 Mar '02

29 Mar '02

> I would like to use some of the functions provided by the standard c or > c++ library from a KEXT. Is this possible? For instance, I would like to > use sin to debug some problems in my audio driver. Is the name mangling > different when code is being compiled for a kernel module? Can I link > against a dylib? What must be done to link against the standard > libraries, if this is possible? > > Thanks, > > Sean I have linked my KEXT agains a re-compiled version of the standard math library (libm). You can either compile both your driver and libm with emulated floating point (-msoft-float) or both without, I can send you the Makefile of the math library if you are interested. The only gotcha is that the libm function "log" has the same name as the bsd function "log", so you have to rename the first to something like "math_log". Hilsen, Frode _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Linking to standard libs in building a KEXT
by Sean Morrell 29 Mar '02

29 Mar '02

j1clark(a)ucsd.edu writes: > >Am Donnerstag den, 28. Mdrz 2002, um 09:51, schrieb Sean Morrell: > >> I would like to use some of the functions provided by the standard c or >> c++ library from a KEXT. Is this possible? For instance, I would like >> to >> use sin to debug some problems in my audio driver. > >That's rather sinful... but anyway, perhaps because of my 'age', I would >immediately assume the libc functions are not reentrant, hence would >cause problems in the kernel. Even if there were 'thread' safe versions, >I would probably extract those functions out of the libc sources, and >compile them with 'my_driver_sin', etc. renaming, given that many libc >functions often drag in other functions which may eventually drag >in far more, and both useless and not remotely 'kernel' functions. >(Heck, I've not looked, but does the kernel printf even support >floats...) If IOLog uses printf, then no it doesn't support floats, or %f anyway. Ah ... reentrancy. Thanks for the reminder. Though I don't think it would be an issue here. I only need the user space lib for testing. And only a single thread would be calling sin, any routines called by sin, or the entire user space library. Anyway, I just created a makeshift sin function using a small sine table. It will do for testing. Thanks _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Linking to standard libs in building a KEXT
by John Clark 29 Mar '02

29 Mar '02

Am Donnerstag den, 28. Mdrz 2002, um 09:51, schrieb Sean Morrell: I would like to use some of the functions provided by the standard c or c++ library from a KEXT. Is this possible? For instance, I would like to use sin to debug some problems in my audio driver. That's rather sinful... but anyway, perhaps because of my 'age', I would immediately assume the libc functions are not reentrant, hence would cause problems in the kernel. Even if there were 'thread' safe versions, I would probably extract those functions out of the libc sources, and compile them with 'my_driver_sin', etc. renaming, given that many libc functions often drag in other functions which may eventually drag in far more, and both useless and not remotely 'kernel' functions. (Heck, I've not looked, but does the kernel printf even support floats...) _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Linking to standard libs in building a KEXT
by Justin C. Walker 28 Mar '02

28 Mar '02

On Thursday, March 28, 2002, at 09:51 AM, Sean Morrell wrote: I would like to use some of the functions provided by the standard c or c++ library from a KEXT. Is this possible? For instance, I would like to use sin to debug some problems in my audio driver. Is the name mangling different when code is being compiled for a kernel module? Can I link against a dylib? What must be done to link against the standard libraries, if this is possible? I don't think it's possible. There are two issues that make this a problem: first, the run-time environment for the kernel and user spaces are significantly different; and second, the kernel is expecting static linkage, while the standard libraries you want to link against are dynamic. There are a couple of kernel-specific libraries for both C and C++ usage, but they are pretty limited. Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large * Institute for General Semantics | When LuteFisk is outlawed | Only outlaws will have | LuteFisk *--------------------------------------*-------------------------------* _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Linking to standard libs in building a KEXT
by Louis Gerbarg 28 Mar '02

28 Mar '02

You cannot link against userspace libraries in a kext. Some standard things are included in the kernel's c/c++ runtimes. Since your worried about name mangling I assume you want to link some c++ library in, and my guess would be in most cases you simply can't. There are situations where things like this can be done (the bootstrap kernel linker comes to mind) for simple code with dependencies on the userspace environment On Thursday, March 28, 2002, at 09:51 AM, Sean Morrell wrote: I would like to use some of the functions provided by the standard c or c++ library from a KEXT. Is this possible? For instance, I would like to use sin to debug some problems in my audio driver. Is the name mangling different when code is being compiled for a kernel module? Can I link against a dylib? What must be done to link against the standard libraries, if this is possible? Thanks, Sean _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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latest source?
by Nathan T. Hjelm 28 Mar '02

28 Mar '02

I downloaded the xnu source from cvs hopping it would be somewhat uptodate but discovered that it is only version 1.4.1. Where can i find the latest source to the darwin kernel? _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Linking to standard libs in building a KEXT
by Sean Morrell 28 Mar '02

28 Mar '02

I would like to use some of the functions provided by the standard c or c++ library from a KEXT. Is this possible? For instance, I would like to use sin to debug some problems in my audio driver. Is the name mangling different when code is being compiled for a kernel module? Can I link against a dylib? What must be done to link against the standard libraries, if this is possible? Thanks, Sean _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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stack
by csabasandberg 23 Mar '02

23 Mar '02

Hello, I've desperately been trying to find some detailed info on the way the Stack is shaped and used by Darwin. Maybe someone can point me in the right direction? And now some debugger questions that might be outa line, but I hope some of you might share your knowledge with me! I've been trying to examine stacks using GDB but got some strange results. Does GDB use a "virtual" stack, is that why I am getting "unusal" results, or does it actually examine the stack as it is in the mem in reality? And finally, is there any other debugger available? Thank you very much Csaba _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Obtaining CFBundle properties within driver
by Sean Morrell 22 Mar '02

22 Mar '02

Can I get the various CFBundle properties within the driver? I see CFBundleIdentifier is present in the properties passed to init. But I don't see others, such as CFBundleVersion and CFBundleName. How do I get these properties within my driver? Thanks, Sean _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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