November 2009 - Darwin-kernel

Re: Building 10.6 kernel?
by Chris Simpson 25 Nov '09

25 Nov '09

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Re: Building 10.6 kernel?
by Stacey Son 25 Nov '09

25 Nov '09

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Re: remote debugging with gdb on 10.6.2
by Brian Bechtel 25 Nov '09

25 Nov '09

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 :content-transfer-encoding; bh=/f+3oYCNa04FwjsbNY7OsU60Ifx8pzF8nbnP0h3S+as=; b=McX+3IRGl0g+fal0+58+a4HonvIz2MH4lpe3R0qF5zxuddKk8F8DDes+BBgZMjpqkw 7BApnP7TKqieWpU6hk+0j7mBecZCoWv6+IB5p693bq7ub6vmybhDRhiIJldeY6gwWX6b WuEI5Bg/6LBGFBYld/HGrVbT4XtFLuzlR0wys= 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:content-transfer-encoding; b=rHCst6IMl47XZSinfK3OdYOe3MYgn9GPpwbz1ljyDtF7DOXciTEbpLq22YqwKmmFNb VXeddZlB6LI35NLTCrrWz99DLgD3nWo6RZ6ij1umm/EPi3k9pqJhOZx72S9nq+T69AQU 1p/ZBkMpG99HbBbGLcMXk58iHImW3PNX1gbOc= On Mon, Nov 23, 2009 at 10:19 PM, mogambo <mogambo13(a)gmail.com> wrote: > Thanks, Brian. I made some progress, but I am still having problems. > I tried boot-args 0x144 (although with boot-args 0xd44 I did have _panicd_ip > set as welll). The most important I was misisng was NMI the machine with > power button. I had used remote debugging with freebsd in my previous job. > I don't remember having to do anything special like that. > I am debugging a file system driver, which I am able to load successfully. > I created symbols at kextload time and copied to the debugger machine > earlier. I used -arch x86_64 as the debugger and debugee are both running > 64-bit 10.6. I was able to connect to the debugee in the gdb. With > add-symbol-file, I added the kext symbols, but get warnings: > Reading symbols from /path/to/com.company.kext.fsd.sym... > warning: .o file "/path/to/object.o" more recent than executable timestamp > in "/path/to/com.company.kext.fsd.sym > warning: Could not open OSO file /path/to/object.o to scan for pubtypes for > objfile /path/to/com.company.kext.fsd.sym > : > done. > I was able to set a breakpoint in my kext and apparently hit it too as > expected. However, I cannot single-step through the kext code - I get an > error saying something like "no symbol information for this line was found; > continuing to the end of the function". At the point where I hit the trap > fault, I am unable print any arguments to the function, or locals. > I am sure what I intend to do is not an uncommon use of remote debugging. > What am I doing wrong? Are you following the guidelines at <http://developer.apple.com/mac/library/documentation/DeviceDrivers/Conceptu…> ? In Leopard and later, kextutil was split into two parts. You want to do the following: { build your kext } cd build/Development { in here you would have the kext and kext.dSYM bundles } kextutil -z -n -s . -- ./fsd.kext { it will prompt you for the kext load address. You can get that from "showallkmods" in gdb } inside gdb, use add-kext (gdb) add-kext ./fsd.kext This should give you source lines and locals if you compiled & linked everything correctly. Good luck. _______________________________________________ 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: Building 10.6 kernel?
by Duane Murphy 25 Nov '09

25 Nov '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 darwinbuild to the rescue. :-) On Nov 24, 2009, at 3:51 PM, Duane Murphy wrote: > Am I correct in assuming that the 10.6 kernel cannot be built > (publicly) at this point? Seems like there are several pieces > missing or at least not obvious where to find those pieces. > > References to instructions for building the 10.6 kernel would be > great. (http://developer.apple.com/mac/library/documentation/Darwin/Conceptual/Kern… > doesn't work by the way. :-)) ...Duane -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.10.0 (Build 500) Charset: US-ASCII wsBVAwUBSwx0hkrg9acQ4r2CAQggXgf/ZdIS5/LulSExO3YOKoaMehW48YF3YbgV +nfXzHtjdG0TIBRoip0e4Xb6IW4ZOQnefJjc397iF5a8/P9xWrSkEbP6xuQPcbW8 4HXFERdkiG7vv/90V7t6l3bNPDjkqweCXq6raUsu9rM8sxwH3DVMSl6dC4BLwbpD DsyzOozBUaeHMBqwfYvuCKHhwyeij1LiaH58rt9SkjG4rLxeYJSN5/0uDB6/cjo0 FuPXOhbag48cE8uJ+moLkXREzA/z0vxCLaiHEf8fZiHRNS9c1nFkgFSlRc5xgI6D 26x/Khk50fYmI5Ho2y5FvjK7XX2erHpZw/tZl27n91jM4iepVhy0Bw== =mPEq -----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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Building 10.6 kernel?
by Duane Murphy 24 Nov '09

24 Nov '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 I am correct in assuming that the 10.6 kernel cannot be built (publicly) at this point? Seems like there are several pieces missing or at least not obvious where to find those pieces. References to instructions for building the 10.6 kernel would be great. (http://developer.apple.com/mac/library/documentation/Darwin/Conceptual/Kern… doesn't work by the way. :-)) Thanks, ...Duane -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.10.0 (Build 500) Charset: US-ASCII wsBVAwUBSwxxdUrg9acQ4r2CAQjPgggApkPrHThcJMBd0xblkw672qcfTKXvzP4J j6SdXEeUH0Nz+9DKvI1EUZ/9iYDHE83gsLVs7kLD3LfPKbIwdqrTQCf8mmmp7024 Klhkue6u1YafAV0ShuzXlIF4/tI1FIyvQTgMz6+BNI1BqvEk5R+bHjfk8M13gJ4+ UWyoSGSTgUoRYLEGIlvg27gw82243xxyTOmBacQWp9D+Yrjl4L6S9WZbf8hEoHmH t+g9igpTzcralIQVSPx/YXxOPdqs9rD5kAZ6NxwE3mke8JD0gSIAKHkwKGtWpW/A 8m91WtOugm+pQRFi2JGWZ9NsGnsBHlvTtwmsO73ZviHC1rjFWfAf/Q== =R5Mp -----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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initialization of global semaphore (System V)
by Alex Sheh 24 Nov '09

24 Nov '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thread-index: AcptQC7cEB1f7+sORwqNgvUKT+5DpA== Thread-topic: initialization of global semaphore (System V) _______________________________________________ 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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Kernel stack size and kernel memory debugger
by mogambo 24 Nov '09

24 Nov '09

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Re: remote debugging with gdb on 10.6.2
by mogambo 24 Nov '09

24 Nov '09

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Re: remote debugging with gdb on 10.6.2
by Brian Bechtel 22 Nov '09

22 Nov '09

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=I+Zm2ZLju3P+NEpUYN4YvNPabsR4maKFK34jkcwjMsw=; b=fF3FWcR239pvz+IQbmOzkv3ljfrxyOLFuIaTAebinWHJE2IaSXLemm6UJ9zwUYaWiE O8/VJra7z1pT17VankrD/jyZrcVyd1mSuuuSXdEGl/cNGQmUZ/CsKwKomcHyy5YDFIpw U/6/d97rWb2CwcoDhctSNrAFQY3zZgLoYMbkU= 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=QUsJiHwGwgorCbWoWuZxmVl5ol7tVIR4WC/J/jOTsjWKLHXLDdTKRBLppRienY17bQ 5yJ0q2Z7g1rWZ3Y35nvj+OQunpIqHgF7s46sC6GgAQHzbUNG50T0MyQuVJ8gfjr3XZd4 1NDK08YsWxK0LlDcniKkGkeNM8NdEC613yvBk= On Sat, Nov 21, 2009 at 10:15 PM, Godfrey van der Linden <gvdl(a)me.com> wrote: > Unfortunately the X 6.2 KDK isn't ready yet. Yes, the 10.6.2 Kernel Debug Kit is available. Unfortunately, they haven't moved it to the developer.apple.com/sdk area yet. I don't know why. It's still located in the "Developer Connection" member area, under the Downloads section. I can't get a useful URL to post, because you have to log in with your ADC user and password to retrieve it. _______________________________________________ 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: remote debugging with gdb on 10.6.2
by Godfrey van der Linden 22 Nov '09

22 Nov '09

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Unfortunately the X 6.2 KDK isn't ready yet. Godfrey On 22/11/2009, at 11:35, Brian Bechtel <brian.bechtel(a)gmail.com> wrote: > On Fri, Nov 20, 2009 at 1:06 PM, mogambo <mogambo13(a)gmail.com> wrote: >> Hi, >> I want to do remote debugging on 10.6.2 system. I found the following link >> about remote kernel debugging. I tried using the default kernel, rather than >> building my own and use mach_kernel in the debug kit. > > You should use the Kernel Debug Kit, found at developer.apple.com/sdk. > Mount the disk image Apple provides, then issue the command > > gdb -arch i386 /Volumes/KernelDebugKit/mach_kernel > > inside gdb, issue the command > source /Volumes/KernelDebugKit/kgmacros > > >> However, when I issue >> attach <ip> command in the gdb, remote_connect keeps timing out. The >> boot-args on the target contains debug=0xd44. > > It should be debug=0x144, rather than debug=0xd44. The additional bits > you've set are defined in technote 2118, "Kernel Core Dumps" at > http://developer.apple.com/mac/library/technotes/tn2004/tn2118.html > > setting DB_KERN_DUMP_ON_PANIC means that you'll attempt to send a core > to the IP address in the boot-args argument _panicd_ip. Since you > probably haven't set that, you're probably confusing things. > > The quick summary of 2 machine debugging is: > > For ethernet connections, on the panicking machine: > % sudo nvram boot-args="debug=0x144" > reboot to let this new setting take affect. > Panic the machine, or NMI the machine by pressing the power key. > On the host machine, download the Kernel Debug Kit from > http://developer.apple.com/sdk, or use the search function on > developer.apple.com to find the appropriate Kernel Debug Kit which > matches the operating system version on the panicking machine. > Mount the Kernel Debug Kit image to create /Volumes/KernelDebugKit > % gdb -arch i386 /Volumes/KernelDebugKit/mach_kernel > (gdb) source /Volumes/KernelDebugKit/kgmacros > (gdb) kdp-reattach {ip address or name of panicking machine} > > For firewire connections in Leopard or later, on the panicking machine: > % sudo nvram boot-args="debug=0x144 kdp_match_name=firewire" > reboot to let this new setting take affect. > Panic the machine, or NMI the machine by pressing the power key. > On the host machine, download the Kernel Debug Kit from > http://developer.apple.com/sdk, or use the search function on > developer.apple.com to find the appropriate Kernel Debug Kit which > matches the operating system version on the panicking machine. > Mount the Kernel Debug Kit image to create /Volumes/KernelDebugKit > In a terminal window, invoke fwkdp > % fwkdp > Leave that window open, and in another window, load gdb > % gdb -arch i386 /Volumes/KernelDebugKit/mach_kernel > (gdb) source /Volumes/KernelDebugKit/kgmacros > (gdb) kdp-reattach localhost > > fwkdp redirects your gdb session so that gdb acts as if the host > machine was panicked. It isn't, of course, but the fwkdp session gives > you access to everything on the panicking machine. > > Good luck > _______________________________________________ > 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%40mac.com > > This email sent to gvdl(a)mac.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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