February 2010 - Darwin-kernel

Re: Panics and Logging Messages
by Carlos Calderon 23 Feb '10

23 Feb '10

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi Duane, > Is that are reasonable expectation? That the functions that are > printing in the middle of the kernel panic are likely not the cause of > the kernel panic itself? > > My concern and reason for the question is what level of buffering may > be involved to delay the printing of the message? Yes, that's a reasonable expectation (different processors/cores logging). This is because FireWireKPrintf is synchronous in that it will put the log onto the wire before returning from kprintf(). Additionally, kprintf() is kernel lock synchronized, so as to order all log messages (and make them readable). So, there isn't be any sort of delay "buffering," simply that of transmission, but that should be ordered. Of course, until a processor is halted, it will diligently continue to do work, even when others are in the process of giving up. // carlos On Feb 23, 2010, at 11:57 AM, Duane Murphy wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > I'm packing a couple of questions into this message. > > I'm trying to track down the cause of an elusive kernel panic. I have > the target machine connected over firewire using fwkpfv. I've adjusted > the debugging strings in my kext to print using kprintf. > > Question 1 > > I'm trying to determine which functions may have triggered the kernel > panic. When the kernel panic backtrace is printed to fwkpfv, there are > messages interspersed with the kernel panic. My expectation is that > while the back trace is being calculated, the other processor is still > running. These other messages are from that processor while the kernel > panic is being processed. Then the system is halted. > > Is that are reasonable expectation? That the functions that are > printing in the middle of the kernel panic are likely not the cause of > the kernel panic itself? > > My concern and reason for the question is what level of buffering may > be involved to delay the printing of the message? > > Question 2 > > I've noticed this message after of the kernel panic logged to fwkpfv: > > Attempting to commit panic log to NVRAM > EFI: couldn't save panic info (err = 80000009) > > I've never noticed the second message before (EFI: etc). Can someone > translate that into English? > > Thank you for your insight, > > ...Duane > > > > > -----BEGIN PGP SIGNATURE----- > Version: PGP Desktop 9.10.0 (Build 500) > Charset: US-ASCII > > wsBVAwUBS4QzeErg9acQ4r2CAQhPGwf8DXCDttP0k7qXqt1emXH3bFApNqOYF9mR > mzDLsO1eci+scjzwE9Fybuv5oUoJjobaZWSFcs+tYR1nO9eYqp/l0VUc/cyigDji > Sk6eZeg5xMmUTWdhkcHvSuCZVAoxEWbJhhoLLnKoOddSDt1k8f8NlyyQNa7FrKXH > Em27w6Qe22Tuvo5nIw8dW/zrNu7A7tfsTQ25kVhj0kHLXCKkpieJncbAOZ6tnnzI > JwsOE57oHLjAd+nr9SVANRRhrVxrddLvwXOhycfqoujmIEBEz1MKms70MO92GfrK > Jkdwa6ExQHGhdMK8KrI6o2kStq+x9RBtbRs7A9PHblB/8KQwR/ZEHw== > =N1iq > -----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/carlos%40apple.com > > This email sent to carlos(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.… This email sent to site_archiver(a)lists.apple.com

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Re: Panics and Logging Messages
by Shantonu Sen 23 Feb '10

23 Feb '10

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Well, what are you logging in your panic message? If you're logging a ginormous amount of data, you won't be able to. Shantonu Sen ssen(a)apple.com Sent from my Mac Pro On Feb 23, 2010, at 12:58 PM, Brian Bechtel wrote: > On Tue, Feb 23, 2010 at 11:57 AM, Duane Murphy <duanemurphy(a)mac.com> wrote: > >> I've noticed this message after of the kernel panic logged to fwkpfv: >> >> Attempting to commit panic log to NVRAM >> EFI: couldn't save panic info (err = 80000009) >> >> I've never noticed the second message before (EFI: etc). Can someone >> translate that into English? > >> From xnu source, efi.h > > #define EFI_OUT_OF_RESOURCES EFIERR (9) > > > I would recommend filing a bug report. > _______________________________________________ > 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/ssen%40apple.com > > This email sent to ssen(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.… This email sent to site_archiver(a)lists.apple.com

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Re: Panics and Logging Messages
by Brian Bechtel 23 Feb '10

23 Feb '10

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=Fh5fs48yoZ88MGnZmVqvDmqt9M1RoF0JJxr09kYZBys=; b=IdgPYGMr9T7LJgLLWz/JA/7K9z6ItqHnTGf1ANYaUI2y3ujgw1CqxLkMdXCL9vpxt5 ULIjOI9jRj7KMRoDjK/CSnUx+LSfU7CJbWoVM5OcPeg+Ke1/opwbPzK9DZOQdB3osrYx kgVuPh71qmTH5HdDi1xBi3T1lm+xy68iSm6kU= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=F9USPdWJZfNo8x7UBy6q3eqUkDm8BAaRAyLZzWTHKaGCUx75wpNrFtTbjve9SF1KvA vBAa5mu0s8r/1tdDt3qufjqX7tI/9XVwRQ8InEHDqVlUX1y2A8pDF+POhgKd1gqerLS9 3NP4D3ooGftNfsP6dmvQ4QIYlR+aBxX6me1rY= On Tue, Feb 23, 2010 at 11:57 AM, Duane Murphy <duanemurphy(a)mac.com> wrote: > I've noticed this message after of the kernel panic logged to fwkpfv: > > Attempting to commit panic log to NVRAM > EFI: couldn't save panic info (err = 80000009) > > I've never noticed the second message before (EFI: etc). Can someone > translate that into English? >From xnu source, efi.h #define EFI_OUT_OF_RESOURCES EFIERR (9) I would recommend filing a bug report. _______________________________________________ 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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Panics and Logging Messages
by Duane Murphy 23 Feb '10

23 Feb '10

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 I'm packing a couple of questions into this message. I'm trying to track down the cause of an elusive kernel panic. I have the target machine connected over firewire using fwkpfv. I've adjusted the debugging strings in my kext to print using kprintf. Question 1 I'm trying to determine which functions may have triggered the kernel panic. When the kernel panic backtrace is printed to fwkpfv, there are messages interspersed with the kernel panic. My expectation is that while the back trace is being calculated, the other processor is still running. These other messages are from that processor while the kernel panic is being processed. Then the system is halted. Is that are reasonable expectation? That the functions that are printing in the middle of the kernel panic are likely not the cause of the kernel panic itself? My concern and reason for the question is what level of buffering may be involved to delay the printing of the message? Question 2 I've noticed this message after of the kernel panic logged to fwkpfv: Attempting to commit panic log to NVRAM EFI: couldn't save panic info (err = 80000009) I've never noticed the second message before (EFI: etc). Can someone translate that into English? Thank you for your insight, ...Duane -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.10.0 (Build 500) Charset: US-ASCII wsBVAwUBS4QzeErg9acQ4r2CAQhPGwf8DXCDttP0k7qXqt1emXH3bFApNqOYF9mR mzDLsO1eci+scjzwE9Fybuv5oUoJjobaZWSFcs+tYR1nO9eYqp/l0VUc/cyigDji Sk6eZeg5xMmUTWdhkcHvSuCZVAoxEWbJhhoLLnKoOddSDt1k8f8NlyyQNa7FrKXH Em27w6Qe22Tuvo5nIw8dW/zrNu7A7tfsTQ25kVhj0kHLXCKkpieJncbAOZ6tnnzI JwsOE57oHLjAd+nr9SVANRRhrVxrddLvwXOhycfqoujmIEBEz1MKms70MO92GfrK Jkdwa6ExQHGhdMK8KrI6o2kStq+x9RBtbRs7A9PHblB/8KQwR/ZEHw== =N1iq -----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.… This email sent to site_archiver(a)lists.apple.com

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Re: Exporting kext symbol
by Dean Reece 23 Feb '10

23 Feb '10

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Re: Exporting kext symbol
by Sudarshan S 23 Feb '10

23 Feb '10

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Re: Exporting kext symbol
by Shantonu Sen 22 Feb '10

22 Feb '10

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Exporting kext symbol
by Sudarshan S 22 Feb '10

22 Feb '10

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Re: Kernel Panic Error Code 9
by William Kucharski 18 Feb '10

18 Feb '10

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Mozilla/5.0 (X11; U; SunOS i86pc; en-US; rv:1.9.1.7) Gecko/20100115 Lightning/1.0b1 Thunderbird/3.0.1 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 I should have posted this: - --- Wed Feb 3 14:01:53 2010 panic(cpu 1 caller 0x001AB0FE): Kernel trap at 0x004263e7, type 14=page fault, registers: CR0: 0x8001003b, CR2: 0xffffffff, CR3: 0x00d47000, CR4: 0x00000660 EAX: 0xffffffff, EBX: 0x019693c0, ECX: 0x00000000, EDX: 0x1b555038 CR2: 0xffffffff, EBP: 0x21097e38, ESI: 0x00000000, EDI: 0x00000000 EFL: 0x00010246, EIP: 0x004263e7, CS: 0x00000008, DS: 0x02b50010 Error code: 0x00000009 Backtrace (CPU 1), Frame : Return Address (4 potential args on stack) 0x21097c58 : 0x12b4c6 (0x45f91c 0x21097c8c 0x13355c 0x0) 0x21097ca8 : 0x1ab0fe (0x469a98 0x4263e7 0xe 0x469248) 0x21097d88 : 0x1a1713 (0x21097da0 0x2aeece3 0x21097e38 0x4263e7) 0x21097d98 : 0x4263e7 (0xe 0xb50048 0xa1960010 0x10) 0x21097e38 : 0x42752f (0x19693c0 0x4 0x0 0x0) 0x21097e88 : 0x2141bfe7 (0x29693c0 0x2141be56 0x4 0x0) 0x21097eb8 : 0x2141b604 (0x27df000 0x4 0x21097ed8 0x129b85) 0x21097ed8 : 0x41c606 (0x27df000 0x4 0x27df000 0x27df000) 0x21097f48 : 0x41c99d (0x27df000 0x21097f94 0x1367d3 0x19fed4) 0x21097f78 : 0x13ebde (0x27df000 0x0 0x1a436f 0x295d998) 0x21097fc8 : 0x1a14fc (0x522b60 0x0 0x1a40b5 0x26c8128) Backtrace terminated-invalid frame pointer 0 Kernel loadable modules in backtrace (with dependencies): com.apple.iokit.IOUSBFamily(3.5.2)@0x21405000->0x2142efff Or, the kernel tried reading from a bad location - in this case -1 (0xffffffff). William Kucharski _______________________________________________ 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 02/18/10 14:29, Duane Murphy wrote: So according to page 6-55 of the Intel doc, Error Code 9 means the "P" and "RSVD" were set; buts W/R, U/S and I/D were 0: P: The fault was caused by a page-level protection violation W/R: The access causing the fault was a read U/S: The access causing the fault originated when the processor was executing in supervisor mode RSVD: The fault was caused by reserved bits set to 1 in a page directory I/D: The fault was not caused by an instruction fetch This email sent to site_archiver(a)lists.apple.com

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Re: Kernel Panic Error Code 9
by Duane Murphy 18 Feb '10

18 Feb '10

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 I should have posted this: - --- Wed Feb 3 14:01:53 2010 panic(cpu 1 caller 0x001AB0FE): Kernel trap at 0x004263e7, type 14=page fault, registers: CR0: 0x8001003b, CR2: 0xffffffff, CR3: 0x00d47000, CR4: 0x00000660 EAX: 0xffffffff, EBX: 0x019693c0, ECX: 0x00000000, EDX: 0x1b555038 CR2: 0xffffffff, EBP: 0x21097e38, ESI: 0x00000000, EDI: 0x00000000 EFL: 0x00010246, EIP: 0x004263e7, CS: 0x00000008, DS: 0x02b50010 Error code: 0x00000009 Backtrace (CPU 1), Frame : Return Address (4 potential args on stack) 0x21097c58 : 0x12b4c6 (0x45f91c 0x21097c8c 0x13355c 0x0) 0x21097ca8 : 0x1ab0fe (0x469a98 0x4263e7 0xe 0x469248) 0x21097d88 : 0x1a1713 (0x21097da0 0x2aeece3 0x21097e38 0x4263e7) 0x21097d98 : 0x4263e7 (0xe 0xb50048 0xa1960010 0x10) 0x21097e38 : 0x42752f (0x19693c0 0x4 0x0 0x0) 0x21097e88 : 0x2141bfe7 (0x29693c0 0x2141be56 0x4 0x0) 0x21097eb8 : 0x2141b604 (0x27df000 0x4 0x21097ed8 0x129b85) 0x21097ed8 : 0x41c606 (0x27df000 0x4 0x27df000 0x27df000) 0x21097f48 : 0x41c99d (0x27df000 0x21097f94 0x1367d3 0x19fed4) 0x21097f78 : 0x13ebde (0x27df000 0x0 0x1a436f 0x295d998) 0x21097fc8 : 0x1a14fc (0x522b60 0x0 0x1a40b5 0x26c8128) Backtrace terminated-invalid frame pointer 0 Kernel loadable modules in backtrace (with dependencies): com.apple.iokit.IOUSBFamily(3.5.2)@0x21405000->0x2142efff BSD process name corresponding to current thread: kernel_task Mac OS version: Not yet set Kernel version: Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386 System model name: MacBook2,1 (Mac-F4208CAA) - --- I have other panics where Error code: (in line 6) is 0x00000000. In this case it's 9, but the stack trace is essentially the same, but the registers are very different. For example CR2 and EAX are 0xffffffff where in the other stack trace they are 0x000000000. If I interpret the referenced manual correctly, from page 6-55, this is a page fault (14). Then the error code is a bit mask indicating P and RSVD, which is a page level protection violation with a reserved bit set. I guess that might happen if one dereferences 0xffffffff. :-) Thanks for your help, ...Duane On Feb 18, 2010, at 1:10 PM, William Kucharski wrote: > On 02/18/10 12:58, Duane Murphy wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA256 >> >> I'm deciphering a few kernel panics. What is Error Code 0x00000009? >> >> Some of the crashes indicate 0x00000000. This is reading from a non- >> present page (e.g. reading from 0). >> >> But what is error code 9? In this case the registers that were 0 in >> the error code 0 crash are all 0xffffffff. > > What kind of panic was it? > > Error codes mean different things depending on the exception type. > > Assuming it was an Intel Mac, see chapter 6 of "Intel® 64 and IA-32 > Architectures Software Developer’s Manual Volume 3A: System > Programming Guide, Part 1": > > <http://www.intel.com/Assets/PDF/manual/253668.pdf> > > William Kucharski > ...Duane -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.10.0 (Build 500) Charset: WINDOWS-1252 wsBVAwUBS32xJkrg9acQ4r2CAQhgNAgA4fSGAIdJ3a+tWP/0WjmeNc6154Yn3XQ3 1y1ZeHqs0XM7Td2ZM1ZXU4tWSwk4AWceO8zCBe+ZRipHDoKb/MQhSJHkQdjglwnd /aGnm1i8MEmO689mg0OZThcoL+s1RYz1wHVy8ngAf8YNMSL2HirqrmHk/2dDeL6J tXJbxio94QHRMHQni2PXiSYwbWalY0JapfYweMvQQk1Z5CU8/QAev/1+D83JA00v 8sJYmO3h+1sYA/oQ/71eE8D7I8sAyHLavgYO/aF5wNaLRrIQHqRoBlK9imP1YRwj hn13aVT1/KGt2tHItsyd7XAFrP01Uf0l9gl/XHnKaKUymP5wX2X0Tg== =wd96 -----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.… This email sent to site_archiver(a)lists.apple.com

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