June 2005 - Darwin-kernel - lists.apple.com

Re: Is it legal for a driver to use current_proc() in tiger?
by Andrew Gallatin 30 Jun '05

30 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Mike Smith writes: > > On Jun 29, 2005, at 2:01 PM, Andrew Gallatin wrote: > > > But I don't want a referenced handle. I promise to always use it in > > that process context and not cache it anyplace. Since I'm using it in > > my ioctl routine, the process is not going to disappear. Is it legal > > to just continue to use current_proc()? > > I can't see any reason why not. It continues to be inexplicably > prototyped in > <vm.h>, but it looks like it's still kosher from here. Thanks. The vm.h prototype is exactly what made me nervous. I've gotten burned so many times in the past by using "internal" things that I thought I should check. Thanks again, Drew _______________________________________________ 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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copyout across 256MB boundary bug in 10.4.1
by Andrew Gallatin 30 Jun '05

30 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com I'm attempting to copyout a huge amount of data (a few hundred megs, broken into 508KB chunks) from the ioctl routine of a driver. I think I'm seeing corruption when copying out across 256MB boundaries in the process address space. Many chunks (I've tested up to 512MB, but it can go higher) are copied in a fairly tight loop, which calls copyout on 127 pages at a time. It seems rock solid for small buffers, but once I get over a few hundred megs, I see some "interesting" corruption. The corruption starts at user address 0x10000000 and continues through the page starting at 0x1006f000. Another "bad spot" appears at 0x20000000 and continues through the page starting at 0x2006f000. Moreover, the contents which should appear at 0x20000000..0x2006ffff appear at 0x10000000..0x1006ffff, while I see stale data at 0x20000000..0x2006ffff. This makes it seem like large copyouts which cross a 256MB boundary may wrap around, and write to exactly 256MB below the desired address. This corruption disappears entirely if I alter my code to never copyout across a 256MB boundary. I know that the copyout code treats 256MB as "special", as I see references to it in the ./osfmk/ppc/pmap.c:MapUserMemoryWindow() as well as in ./osfmk/ppc/movc.s However, I'm not fluent in mach vm, or pps asm, so most of that code is Greek to me. I can't make this fail on panther (10.3.5), only on tiger (10.4.1). The processes are 32-bits. The test machine is a dual 2.0GHz G5 with 4.5GB of ram. The failures seem most likely to occur just after I re-compile the test executable. I tried all kinds of tests to put memory pressure on the system, but the most reliable way to induce this is to rebuild the test binary just before running it. After the first failure, the test always succeeds. Am I crazy, or is there a bug here? ( or both ;) Thanks in advance for any help, Drew _______________________________________________ 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: Is it legal for a driver to use current_proc() in tiger?
by Mike Smith 30 Jun '05

30 Jun '05

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

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Re: Problem on Mac 10.4 Tiger with the drivers porting
by Quinn 30 Jun '05

30 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Apple claimed that porting drivers are backword compatabilty , 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 19:25 +0530 30/6/05, Karunakar Reddy G wrote: but my mac 10.1.3 drivers doesnot work on mac 10.4, where as it work on 10.3, I/O Kit drivers written for 10.1.3 should continue to work on 10.4.x. However, some I/O Kit drivers link with more than just I/O Kit (for example, a disk image driver must necessarily link with BSD to get access to the file system), and these drivers have the same problems as other (non-I/O Kit) KEXTs on 10.4: they must be ported to use the KPIs. can any body help me what could be the problem, errors are shown in this way The log message isn't particularly helpful. Try loading your driver with "kextload -t". This produces more helpful debugging output. This email sent to site_archiver(a)lists.apple.com

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Problem on Mac 10.4 Tiger with the drivers porting
by Karunakar Reddy G 30 Jun '05

30 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type; b=HOTrAlYoZIj0o0is89gInm4IcrxbaiLUIyn6Nlae1EfR0vp/Bzs/DZvEZKfe7KJioQqZlNkYgKO/7wJ+7QQpTswxXGdv362MGsONcjPTm75bgcd2qmv1VhXbbGbecWMGEzTECOdX3CBZb+vEO6HhTVpXnL1MhzpepmWAOGlnJ0Q= _______________________________________________ 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: VFS requirements for carbon/cocoa?
by colley 30 Jun '05

30 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Microsoft-Entourage/11.1.0.040913 On 6/30/05 5:15 AM, "Quinn" <eskimo1(a)apple.com> wrote: >> Now onto the next problem: keychain corruption > > IIRC, keychain does /lots/ of tiny reads and writes, which has > tripped up other file systems in the past. > > S+E Quinn is correct. If you are using the cluster I/O routines, look into your setting of the EOF. The Keychain will write pass the EOF with a lot of real small writes. George _______________________________________________ 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: Where can I get the Darwin Kernel Source from?
by Mohanasundaram Chandran 30 Jun '05

30 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=hyWM8pw9W5ITUCa0VM9tbA/+CyQ0qURQNtd31S6ekAq1Kp6FX+Hb79DP3gWH4fB9oYA18p5YxMUtlYP/0y9rQUCW9iCogJ89fARutnh1MxHz+ul28nwOgeTrPSe9HLuea8fR1ujUfeFFAXbpXnNj0T1yT/GQRxrS1h/ThAwcFr8= Hi William, Thanks a lot. Regards, Mohan. On 6/30/05, William Kucharski <kucharsk(a)mac.com> wrote: > On Jun 30, 2005, at 2:49 AM, Mohanasundaram Chandran wrote: > > > Hi William, > > Thanks for your reply. > > http://developer.apple.com/darwin/ > > The link gives me the installer and link for the full darwin > > source code. From the source code i could not find the kernel source > > code. Can you please tell me which package contains the kernel source. > > Most of the core kernel is in the xnu package, so for Darwin 8.1 > (equivalent to MacOS X 10.4.1) that would be: > > <http://www.opensource.apple.com/darwinsource/10.4.1/xnu-792.1.5/> > > William Kucharski > kucharsk(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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Re: VFS requirements for carbon/cocoa?
by Quinn 30 Jun '05

30 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Excellent. 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 21:10 -0400 29/6/05, Chaskiel Grundman wrote: My VFS_READDIR was setting d_reclen to 0 in the last dirent object in the list. This presumably did bad things to getdirentries_exhaustive. Once that was fixed, console logins work much better. Now onto the next problem: keychain corruption IIRC, keychain does /lots/ of tiny reads and writes, which has tripped up other file systems in the past. This email sent to site_archiver(a)lists.apple.com

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Re: Where can I get the Darwin Kernel Source from?
by Markus Hitter 30 Jun '05

30 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Am 30.06.2005 um 08:28 schrieb Mohanasundaram Chandran: <http://darwinsource.opendarwin.org/> - - - - - - - - - - - - - - - - - - - Dipl. Ing. Markus Hitter http://www.jump-ing.de/ _______________________________________________ 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.… Somebody please tell me from where can I get the Darwin Kernel Source? This email sent to site_archiver(a)lists.apple.com

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Where can I get the Darwin Kernel Source from?
by Mohanasundaram Chandran 30 Jun '05

30 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=DvzpHvf9dxIsuyhm5+dkHmC7oFrjWlXQ0vXa6BVWWmrRAjoCN5q2VDLdgtXZKojNr02ewMhcjvt4/D4+7IBYskZnSwG38hVS7RTlEz6fBZFbIhYNmuoxiIV/107tXAa9gQ0KZuKsdxys9J+YtgOeRhy316u78ia+/iXqv1hk6Is= Hi All, Somebody please tell me from where can I get the Darwin Kernel Source? Any links? or it comes with the Darwin installer? Regards, Mohan. _______________________________________________ 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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