April 2008 - Darwin-kernel - lists.apple.com

Re: kernel panic on readBytes
by Quinn 07 Apr '08

07 Apr '08

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Ok, I figured out how to get the logs, etc, out of it. I tried searching on google and the apple developer for the error it reports: AppleDART::mapAddr not mapped for I/O -- and couldn't find anything as to what could be going on. Any hints? Is there some other way to map memory pages? S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/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 16:59 -0400 4/4/08, Timur Alperovich wrote: The problem you have here is that the G5 systems have an IOMMU (the DART) between the CPU and the PCI bus. This makes it possible to support more than 2 GB of physical memory in an efficient, software compatible fashion. When you prepare a chunk of memory for I/O, the system adds to the DART a mapping from the 32-bit PCI physical address space to the 64-bit CPU physical address space. When you ask for the physical address of the memory, you get back the 32-bit PCI address. You can then program that address into your DMA hardware and, when you DMA to that address, the IOMMU translates it into the appropriate CPU physical address. Of course, this doesn't help folks who are trying to access CPU physical addresses (-: I suspect you can work around this with the kIOMemoryTypePhysical64 flag, but I haven't looked at it in depth. This email sent to site_archiver(a)lists.apple.com

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Re: Linkage error for symbol mach_port_set_qlimi?
by Quinn 07 Apr '08

07 Apr '08

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com <http://www.opensource.apple.com/darwinsource/10.5/xnu-1228/osfmk/man/mach_p…> S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/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 2:46 -0400 6/4/08, Mathieu Beliveau wrote: If anyone can help, that'll be greatly appreciated. AFAIK mach_port_set_qlimit has never been supported on Mac OS X. Try mach_port_set_attributes with the MACH_PORT_LIMITS_INFO flavour. This email sent to site_archiver(a)lists.apple.com

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Linkage error for symbol mach_port_set_qlimi?
by Mathieu Beliveau 06 Apr '08

06 Apr '08

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:received:received:subject:from:to:content-type:date:message-id:mime-version:x-mailer:content-transfer-encoding; bh=BAy1GMSEuHj/tX5LOjgi1EPj1+441gwai7tzpcjZW4w=; b=Z0SjVXCApuI9jqVR24pmE1vmO4BFTWZKBeMYGLd84838O6dX2IUXK8ia1dh8U1IMzmZ3pk3+OA04XCc51EEfoM2HVwtMbZWJUuzZD77FCHuk3y1HrbXqQu1gEoTHmr4e3LgzONiR9TGYppgMJRsLgT4/IGAfkzFecnjbSN7I4ow= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:from:to:content-type:date:message-id:mime-version:x-mailer:content-transfer-encoding; b=Tfa3wsFpF1miNxrQYfwJkWag8ypw1TLDcWWNH7hlfMvvpcn8/oMcs/7/xbGQmKTNLMj8Xvk8CNipEbCD1Gt/0ZzJ83OQ6iedUUcuJuAhD9v7aOvvRs8ZUKc5oLqBwrdDUv2SHsdyL/WXbJbANUqnyoGZGQCJjnzGIsDurGrymEc= Hi, I'm running into some trouble using the function mach_port_set_qlimit. Namely, the following code (added to my server initialization in order to increase the queue limit): mach_port_msgcount_t low_qlimit; low_qlimit = 10; //For max == 16 mach_port_set_qlimit(mach_task_self(), server_port_low, low_qlimit); Compiles but yeild the following error message when ran: dyld: lazy symbol binding failed: Symbol not found: _mach_port_set_qlimit Referenced from: /Users/vincent/Desktop/Cook Lab/MACH_SERVER_10.5/s.mexmac Expected in: flat namespace This appears to be a linking issue so I tried adding: -Wlflat_namespace, but it gave no results. If anyone can help, that'll be greatly appreciated. Thanks Mathieu Beliveau _______________________________________________ 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: kernel panic on readBytes
by Terry Lambert 04 Apr '08

04 Apr '08

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thanks for the prompt responses! Please see Technical Note 2063. <http://developer.apple.com/technotes/tn2002/tn2063.html>. Ok, I figured out how to get the logs, etc, out of it. I tried searching on google and the apple developer for the error it reports: AppleDART::mapAddr not mapped for I/O -- and couldn't find anything as to what could be going on. Any hints? Is there some other way to map memory pages? Here is a code snippet of what I'm doing: IOMemoryDescriptor* d = IOMemoryDescriptor::withPhysicalAddress(inStruct->offset, 4096, kIODirectionOut); if(d == NULL){ IOLog("Failed to grab a descriptor\n"); return kIOReturnError; } if(d->prepare() != kIOReturnSuccess){ IOLog("Failed to prepare the page\n"); return kIOReturnError; } char buf[4096]; int copied; copied = d->readBytes(0, (void*) buf, 4096); // <--- Removing this line gets rid of the panic -- makes me think the error is here. -- Terry _______________________________________________ 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 Apr 4, 2008, at 1:59 PM, Timur Alperovich wrote: Typing "kernel panic" into the search engine on developer.apple.com would turn this up too. You can not do I/O to memory which is not in the I/O memory window mapped by the DART. You are passing it a random buffer, which you did not allocate out of the I/O memory space (apparently, it is off a kernel stack). If you have ever programmed for SPARC or DEC Alpha, they have the same thing. If you haven't, thing "bounce buffers" for 16 bit devices in a 32 PC operating system, or 32 bit devices in a 64 bit PC operating system. Basically, if you follow the examples from <http:// developer.apple.com> and use the proper allocation routine for the buffer, you will be fine. This email sent to site_archiver(a)lists.apple.com

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Re: kernel panic on readBytes
by Timur Alperovich 04 Apr '08

04 Apr '08

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:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=adkN67JZUnn3zu4/Q9foUkF50lldYDNZWSl8oncsJDA=; b=PrDaVjexCKll9nGn8pcGC1z/Nk+g78E+qi8IelkIUmqLxb1fR7Ail/qg2yqqBwZs76ekhVUCXJPWEGxj+kBH94tafhcBjC/rSgYYKqiP8zUx2jgIJejpzRIBovdH7hculisWs/caT89lmV8R+RXPoQDwB/1KppEbz0jbut3hSXk= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=LnDIGJ3MoRr8QDWwe4TzeZq6DLxN2kgqAi+GJmpX6oUJgKaa5rPNQogXSaji8rH4xaU6aNFEp7g14ORA1kFPOWhukl1bvzmaz8YKzCE5ZQ9szQqXKz7RYXrdB6DWz4fUWLKC3XOqHMATyYBpMI8F8OxI2R6Xhhwxgc5gFV+0lVk= Thanks for the prompt responses! > Please see Technical Note 2063. > <http://developer.apple.com/technotes/tn2002/tn2063.html>. > > Typing "kernel panic" into the search engine on developer.apple.com would > turn this up too. Ok, I figured out how to get the logs, etc, out of it. I tried searching on google and the apple developer for the error it reports: AppleDART::mapAddr not mapped for I/O -- and couldn't find anything as to what could be going on. Any hints? Is there some other way to map memory pages? Here is a code snippet of what I'm doing: IOMemoryDescriptor* d = IOMemoryDescriptor::withPhysicalAddress(inStruct->offset, 4096, kIODirectionOut); if(d == NULL){ IOLog("Failed to grab a descriptor\n"); return kIOReturnError; } if(d->prepare() != kIOReturnSuccess){ IOLog("Failed to prepare the page\n"); return kIOReturnError; } char buf[4096]; int copied; copied = d->readBytes(0, (void*) buf, 4096); // <--- Removing this line gets rid of the panic -- makes me think the error is here. d->complete(); d->release(); return kIOReturnSuccess; _______________________________________________ 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: kernel panic on readBytes
by Garth Cummings 04 Apr '08

04 Apr '08

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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kernel panic on readBytes
by Timur Alperovich 04 Apr '08

04 Apr '08

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:received:received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; bh=EVjRQ7h88USYr1LZninKJu0GnGIOFkGyh2u1LUi82tU=; b=xtIv7cEBTpeiG6/NUBqUrm8HDlAGPIKwKJKoffJZH+Pgd8wlVYJ6Xf/J+mdIvWjRwDKwWczH5dbc70VR+TSrxhDZekFeSBDbf+ytQrEhB150i+cE3URmJA4amYMMsCyf/6lgy6dC3fzWMphmwnfVBumxD8LSFOzWLW6EBTYw4mw= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=rtMFnW/mG2/Ue2hEtO08k74Dt+FOmode1RLUeD0okr+eizk3iWLrnz9EnEfDGo16y+hP1P/nfojpEnY+fe8ziHlwbg2MKVDJs29juvON+qhND6SAZ9tzdQGJQCILLx7CWlTHg2li5EFLrDh13Fk2HRu4GLyYIfwitHIf8rKlt6o= Hi, I have a simple kernel extension that's just trying to read memory and return the hashes of given pages. The code runs fine on the x86 mac, but results in a kernel panic on a ppc G5 mac. The call that seems to be the root of the problem is readBytes -- actually retrieving page contents. The calls to get a descriptor, as well as to prepare it, succeed and I check their results. What are the possible reasons for this? Any tips on troubleshooting the panics since all it produces is a message telling me to restart? It'd be nice to see a dump or something :) Thank you, Timur _______________________________________________ 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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Find the new Ethernet interface
by Rakesh Singhal 04 Apr '08

04 Apr '08

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=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type; bh=0Xw7oBKXCSZiezIKYPMdc+UwaeMvNduJofkUNqXE1wY=; b=VrKUo4EbUJVwupu1VF1crD0I3i9hsLWMPm0g2RrxvWjlp4G2r/pZAjIu1XofO3dUVFiX4WHq+jovCdCG3TknPy2pIsngXoFuyVaAMVqBs0cj5sgp2Y6+tYrX8ULIy7NTeteM0FLi53SV9udp/YRh5g85pCFSSFWnG6xlBFtoc1I= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=message-id:date:from:to:subject:mime-version:content-type; b=a08ISRWWFjYFhOaHjjrNlePBe0o8+/ckxvB4s7o/Eq9fw0An+UdpN8EDncGnrVzXflG9cxiuABfELCTLrTgqL8yoe6NN1orgwl+GxcGGmoIQU467RJ1JkGEya5Eb+ljjJ5kJsxCZNsYnivIEW+Y+jpZpSzF5ksAAFIfAts6Qd2E= _______________________________________________ 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: Mach IPC from osX 10.4.x to 10.5.x
by Terry Lambert 03 Apr '08

03 Apr '08

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Typically, this means being started by Launchd. See also <http://developer.apple.com> about launch services. -- Terry _______________________________________________ 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 Apr 3, 2008, at 4:19 AM, Mathieu Beliveau wrote: I've recently written an IPC framework based on Tiger's Mach api (on a ppc) and it runs smooth. Now, I've recompiled my code on an intel mac along with Leopard and there actually seems to be a problem in the creation of my server's ports. I unfortunately don't have a debug output to show as I didn't personnally ran the tests but mainly, I would really appreciate if someone refer me to some up-to-date documentation about leopard's Mach IPC so I could revise my code for it. If it works in Tiger but not Leopard, and you aren't doing something like trying to IPC between a PPC and an Intel binary running on a PPC machine, this sounds like you used one of the "dirty tricks" to get your bootstrap port into the bootstrap namespace. Due to increased security in Leopard, you have to do this the approves way, rather than climbing to the root of the current namespace to get to the bootstrap namespace. This email sent to site_archiver(a)lists.apple.com

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Mach IPC from osX 10.4.x to 10.5.x
by Mathieu Beliveau 03 Apr '08

03 Apr '08

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=beta; h=domainkey-signature:received:received:subject:from:to:content-type:date:message-id:mime-version:x-mailer:content-transfer-encoding; bh=GaNt3BBkia1oX8/5AyLbDK08sOAPMn5BgHhWilnocDA=; b=Q6KZAH1W2fV8F5p3km31Ag500JWzSSx7tK29BwrZkIU8WUtmdpi5lpw+1Rzr3wOQ1cFdxrGgSuhJuhbsnMj0WlpzCo8xEzqE2/mJGyLNPZdKr/Ip7TNfx4lwhZD+Xg3TpEfKgN5hVrze/BRs7hxEZYIbsR5kFi/gnyR+n+KfREw= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=subject:from:to:content-type:date:message-id:mime-version:x-mailer:content-transfer-encoding; b=qRKwSEsHnvnnMGsgj0XgNUbqZp4tOUDKFs0bNOKrd+oH7ww2E0quCRtv7IJBOAkLiiP2EjMLh1Z7MfuYzCflPgp+N3IgA/c91UThnasjtHKh2nKlmPPyqw7kWdbiX+378x6baB4m1n0RgUxGwx8WYD3FOmVvcYQozojwk3biN5U= Hi, I've recently written an IPC framework based on Tiger's Mach api (on a ppc) and it runs smooth. Now, I've recompiled my code on an intel mac along with Leopard and there actually seems to be a problem in the creation of my server's ports. I unfortunately don't have a debug output to show as I didn't personnally ran the tests but mainly, I would really appreciate if someone refer me to some up-to-date documentation about leopard's Mach IPC so I could revise my code for it. Note: I don't personnally own a mac and don't even have an ssh access to the machine on which the framework is intended to run on so while I get my access, all I can use is some doc on the net. Thanks in advance! Mathieu Beliveau _______________________________________________ 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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