August 2011 - Darwin-kernel

Re: kext debugging in Lion broken?
by B.J. Buchalter 16 Aug '11

16 Aug '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Aug 16, 2011, at 7:01 PM, Alexander von Below wrote: > I could not say for sure, but I doubt Ethernet Kernel Debugging works any better or worse than in any version of OS X. It has always been tricky. > > Personally, I do not see the need for Ethernet debugging when Firewire Debugging is available Two possible reasons: 1) You are debugging a FireWire device driver (then you can't use FWKDP) 2) You are debugging on a machine that does not have FireWire (quite a few at this point)... Best regards, B.J. Buchalter Metric Halo http://www.mhlabs.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

1 0

Re: kext debugging in Lion broken?
by Alexander von Below 16 Aug '11

16 Aug '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com I could not say for sure, but I doubt Ethernet Kernel Debugging works any better or worse than in any version of OS X. It has always been tricky. Personally, I do not see the need for Ethernet debugging when Firewire Debugging is available Alex Am 17.08.2011 um 00:58 schrieb David Tay: > > You're correct. The text was copied from an Apple dev doc. > > Anyway fw debugging works. > > Any chance the Ethernet debugging will get fixed? > Thanks, > 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.… This email sent to site_archiver(a)lists.apple.com

1 0

Re: kext debugging in Lion broken?
by David Tay 16 Aug '11

16 Aug '11

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=sbcglobal.net; s=s1024; t=1313535493; bh=hLPKy8TmKkNdt6liWIZd8We2+vMJRB5SbNCL3qn01Bo=; h=X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:References:In-Reply-To:Mime-Version:Content-Type:Message-Id:Content-Transfer-Encoding:Cc:X-Mailer:From:Subject:Date:To; b=CIJIER437DUOa2yzbncl64Eyzeg75+ci6QxhDt1vuiEmQrhOtYSBg4kWAMJxr6o500NC7RhVd6UnhRPHCwurUUYhkeAf5lif8bnEz+ZXOzRUMSCKiNk0Fc0M4N2sLpfHnTPUBlaFPdBGrUEXvLs3G6BIMhFC3k67n59JfcCdfpc= Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=DKIM-Signature:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:References:In-Reply-To:Mime-Version:Content-Type:Message-Id:Content-Transfer-Encoding:Cc:X-Mailer:From:Subject:Date:To; b=dDQvfBZyDNhukPKLyL0WbxG+3XfPoD6LGMKcVoEE2Ir4qXidD5lc8xhzzGEEqdGGs0ekJroWgaDR1xAAtQ9I3xD58RxaAiwWsU5NzSJlnU35NaLZKM3cILVURIdgscyu7u/I3TAQDHipLXrClq+AcwyuDBg/+OOmZ/7Tv5Liggg= ; sudo nvram boot-args="debug=146 kdp_match_name=firewire" _______________________________________________ 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

1 0

Re: kext debugging in Lion broken?
by Brian Bechtel 16 Aug '11

16 Aug '11

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=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=fsdCv8m62FCsP+88cNHAViPSyatpfUDDe37MJq5ohfg=; b=fc5BHAPzAYJXoGbocjBZPgpKeUKsiCr1xXbnv8U4CL6JcVDDPWCotHiYrJqAIBW/AX K85gSgcGgM0vvr643mcgsfsjxa/od1f3nQ9cRj3LuL7iYeDvnECzsF1Vbq5ULjD4Tps2 5be6JtgbdqPSkv+Uvnu00gXKYwo5IAbzV48fY= sudo nvram boot-args="debug=146 kdp_match_name=firewire" _______________________________________________ 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

1 0

Re: kext debugging in Lion broken?
by David Tay 16 Aug '11

16 Aug '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com sudo nvram boot-args="debug=146 kdp_match_name=firewire" _______________________________________________ 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

1 0

Re: kext debugging in Lion broken?
by Alexander von Below 16 Aug '11

16 Aug '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com While I can not check this problem, I would always advise to use FirewireKDP over Ethernet debugging. Did you try that? Alex Am 16.08.2011 um 07:06 schrieb David Tay: > > > Previously (Panther - Snow Leopard), I would do the following (ethernet based connection) > 1. load the kext on the target machine kextload -l -s ~/ XXXX.kext > 2. start gdb on the remote machine. > 3. target remote kdp on the remote machine, > 4. add-symbol-file YYYY copied from the target machine. > 5. set break points in the code. > 6. kextstat to make sure the kext was still loaded on the target machine. > 7. Command -Power on target machine > 8. connect <IP addr> from remote machine gdb session. > 9. continue in gdb. > 10. kextload -m on target machine. > > On Lion, none of the breakpoints (eg start, stop) are reached and the driver continues running. I'm using the Lion A511 kernel debug kit. > > > What could be happening? > > Thanks, > > 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/below%40mac.com > > This email sent to below(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

1 0

kext debugging in Lion broken?
by David Tay 16 Aug '11

16 Aug '11

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=sbcglobal.net; s=s1024; t=1313471212; bh=ucHyucJzdc0LdP6LLrTpdaU5urvj4Rhzp4FcfzCG+Sc=; h=X-Yahoo-Newman-Id:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:From:Content-Type:Content-Transfer-Encoding:Date:Subject:To:Message-Id:Mime-Version:X-Mailer; b=1ruEFX8xm7jl540GyDOc7YKq8pHqs6PahmQxt0vaqJ9TZ3YF9Yy44YFPvH99ipxqYcMTOyfSXxA33wVp5zO3UTMIuVmpYLTCUnF+jul90M2b+CMWraOm7gkbx/agxGglUgpEn92RNRBgkaASLRg5yHLxqmmIfy6EsxR9SUaZWW8= Previously (Panther - Snow Leopard), I would do the following (ethernet based connection) 1. load the kext on the target machine kextload -l -s ~/ XXXX.kext 2. start gdb on the remote machine. 3. target remote kdp on the remote machine, 4. add-symbol-file YYYY copied from the target machine. 5. set break points in the code. 6. kextstat to make sure the kext was still loaded on the target machine. 7. Command -Power on target machine 8. connect <IP addr> from remote machine gdb session. 9. continue in gdb. 10. kextload -m on target machine. On Lion, none of the breakpoints (eg start, stop) are reached and the driver continues running. I'm using the Lion A511 kernel debug kit. What could be happening? Thanks, 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.… This email sent to site_archiver(a)lists.apple.com

1 0

Re: Usable directions to build
by Neil Steiner 11 Aug '11

11 Aug '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:5.0) Gecko/20110706 Firefox/5.0 SeaMonkey/2.2 >> It's probably not overly >> painful to build this /if/ I can find the right instructions and >> combination of tools. Can anybody offer any hints, or point me to better >> documentation than I've been able to find so far? > > http://shantonu.blogspot.com/ > updated with Lion (and clang) instructions as well. Thanks Vivek (and ssen/shantonu). Those instructions were flawless. Given how well that worked, I think I'll ask another question: Does anybody know of similar instructions on how to assemble a minimal or full distribution based on XNU and the rest of Apple's open-source code? (My goal is to put Darwin on a virtual machine, so I can use it as a test platform for an open-source tool, along with the various other platforms that we support. No GUI needed: This is all CAD algorithms and tools that run in a console.) _______________________________________________ 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

1 0

Re: booting custom kernel
by Michael Smith 10 Aug '11

10 Aug '11

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.… This email sent to site_archiver(a)lists.apple.com

1 0

Re: booting custom kernel
by Shantonu Sen 10 Aug '11

10 Aug '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Aug 9, 2011, at 11:34 AM, Andreas Fink wrote: > I've followed the excellent up to date page on http://shantonu.blogspot.com/ for building a stock 10.7 kernel from source so I can experiment later with a modified version. > I realize compiling xnu these days have becomesquicker and easier than with 10.4 and older. > > I however wonder: > > What is the currently recommended way to define another boot kernel as boot argument? In the absence of of FileVault, what I'd probably recommend is: 1) Copy your kernel to "/mach_kernel.test" 2) Create "/Library/Preferences/SystemConfiguration/test.plist" following com.apple.Boot.plist(5), with a Kernel=mach_kernel.test key/value 3) Run: sudo bless --mount / --setBoot --options "config=test" When you boot up, test.plist will be loaded, which will in turn indicate that your custom kernel should be used. If at any point you want to revert to the stock kernel, hold down option during boot, and select your hard disk partition. Per the bless(8) man page, since the "config=test" is tied to the NVRAM setting for your boot preference, booting via the OS picker discards that and uses the stock plist and kernel. You can also add in custom Kernel Flags like -v just for testing. > In my case the filesystem is encrypted (FileVault 2.0), so its being booted through the file vault EFI driver. There's no File Vault EFI driver. Boot files are hosted by an auxiliary partition. kextd manages syncing to that partition on demand. > I want to be able to go back to my normal kernel easily and quickly in case the experimental fails totally. Since the boot partition has a fixed size, we do not allow for open-ended kernel configuration. While you could probably reverse-engineer a mechanism based on open source code, I would not recommend trying to do anything sophisticated. Rather, it would be easiest to use a machine that supports both the 32-bit and 64-bit kernel, and have the i386 slice be the stock Apple-provided kernel, and your test kernel be lipo(1)-ed in as the x86_64 slice. The amalgam will get linked into a prelinked kernel cache and synced to the Apple_Boot partition. If you ever want to revert to a working kernel, hold down '3' and '2' during boot to use the stock 32-bit kernel. > Booting to emergency partition and copying kernel file back and forth would be an option but then how to mount encrypted partition in that case? > Just wondering whats the easiest and safest and recommended way > You can use Disk Utility from the recovery partition to unlock encrypted volumes. Shantonu > Andreas > _______________________________________________ > 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

1 0