November 2007 - Darwin-kernel

Re: replacement routine
by Shawn Erickson 17 Nov '07

17 Nov '07

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Re: __CAST_DOWN_CHECK compiler errors
by Dave B. Sharp 17 Nov '07

17 Nov '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.ca; h=X-YMail-OSG:Received:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=EBGVy+j+fpIjROnCkMLGUBxc9KW6qramTf3zsafLdkmNljYq8c6FCeGd8EZbKjlvFc+qgP7kYknTMcCBiY8Yy40XtqEb1fS1vclie4jll2u8cT175vT5E5INLABos9xvUF4pHnC9jrSZNEmIJHjdJfDiEpiU476HWfnA5Y+D5eY=; Thanx sorry, The error was: "error: size of array'__CAST_DOWN_CHECK is negative" The code comes from vm_param.h and the sample driver was created from the xcode generated generic driver. After setting the compiler to gcc 4.0 for the ppc I got this error. Dave --- Shantonu Sen <ssen(a)apple.com> wrote: > You haven't provided the compiler error, nor the > compiler invocation > causing the error, nor much else. > > Shantonu Sen > > On Nov 16, 2007, at 6:08 PM, Dave B. Sharp wrote: > > > Hi there, > > I'm trying to build a hello world driver on a G5 > > using gcc 4.0. Wondering what the solution(s) has > > been to the following error. > > Cheers > > Dave > > > > > > > > /* We need a way to get rid of compiler warnings > when > > we cast from */ > > /* a 64 bit value to an address that is 32 bits. > > */ > > /* We know at this point the cast is harmless but > > sometime in */ > > /* the future it may not be. > > */ > > /* When size of an int is no longer equal to size > of > > uintptr_t then */ > > /* the compile will fail and we know we need to > fix > > our cast. */ > > #include <stdint.h> > > #ifndef __CAST_DOWN_CHECK > > #define __CAST_DOWN_CHECK > > typedef char __NEED_TO_CHANGE_CAST_DOWN[ > > sizeof(uintptr_t) == sizeof(int) ? 0 : -1 ]; > > #define CAST_DOWN( type, addr ) ( > ((type)((uintptr_t) > > (addr))) ) > > #endif /* __CAST_DOWN_CHECK */ > > > > > > > > > ____________________________________________________ > > Yahoo! Canada Toolbar: Search from anywhere on the > web, and bookmark > > your favourite sites. Download it now at > > http://ca.toolbar.yahoo.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/ssen%40apple.com > > > > This email sent to ssen(a)apple.com > > Ask a question on any topic and get answers from real people. Go to Yahoo! Answers and share what you know at http://ca.answers.yahoo.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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How to know Darwin Version from a Kext
by JanakiRam 17 Nov '07

17 Nov '07

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:content-transfer-encoding:content-disposition; bh=95quO2psKszPEWLtXm1/zDxavYKAOVwtwZbEBirpe7Y=; b=Uv7yLNNVlJCNZ8GlHMMDwX6Sq8ZAdC7RmeLvph7ns/AaympAHUN5zm2L5+tiLQxvy5zIrZN8hTfgAkzTdK5xa7aHGvtAXTagWNhbrgJ9qAwUoTWdmvVfEMXR2SMYIvfDafSO/PCp59f13AWZDzUiXZgNC7eHnGSoe+VPnxka0gk= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=WMlDoKyS3BnYJKTiaR2EljoL02De5PYX7wTJd9h5+N6lHfDeOCTeaHUKwIbh6OMs92BZhH626A580IybpyX5/7ga6oHciJ3Y6dq22XxgbdcnkLRHKExwAbAJeO/KX6yETxa/EZSQ3qyhH/bMp83Oj4L+fz3rMxCUTT3fCNgOXaU= Hi All, I'm developing kext(s) for each OS version i.e Leopard & Tiger. Now i need to know the darwin version from kernel libraries so that i can prevent my kext launching on a wrong OS. Can any provide some pointers on acheiving this functionality. Thanks in Advance. -JanakiRam. _______________________________________________ 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: __CAST_DOWN_CHECK compiler errors
by Shantonu Sen 17 Nov '07

17 Nov '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Shantonu Sen On Nov 16, 2007, at 6:08 PM, Dave B. Sharp wrote: Hi there, I'm trying to build a hello world driver on a G5 using gcc 4.0. Wondering what the solution(s) has been to the following error. Cheers Dave /* We need a way to get rid of compiler warnings when we cast from */ /* a 64 bit value to an address that is 32 bits. */ /* We know at this point the cast is harmless but sometime in */ /* the future it may not be. */ /* When size of an int is no longer equal to size of uintptr_t then */ /* the compile will fail and we know we need to fix our cast. */ #include <stdint.h> #ifndef __CAST_DOWN_CHECK #define __CAST_DOWN_CHECK typedef char __NEED_TO_CHANGE_CAST_DOWN[ sizeof(uintptr_t) == sizeof(int) ? 0 : -1 ]; #define CAST_DOWN( type, addr ) ( ((type)((uintptr_t) (addr))) ) #endif /* __CAST_DOWN_CHECK */ _______________________________________________ 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.… You haven't provided the compiler error, nor the compiler invocation causing the error, nor much else. ____________________________________________________ Yahoo! Canada Toolbar: Search from anywhere on the web, and bookmark your favourite sites. Download it now at http://ca.toolbar.yahoo.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/ssen%40apple.com This email sent to ssen(a)apple.com This email sent to site_archiver(a)lists.apple.com

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__CAST_DOWN_CHECK compiler errors
by Dave B. Sharp 17 Nov '07

17 Nov '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.ca; h=X-YMail-OSG:Received:Date:From:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=irDvrYPw0/k7Ov1f3a9G0RSmj9cXjzVV9Y69F4pZMZ1DrxpmN0XZrx1X9S3FegtUCKrnfVHUL7pOEU6JmyQiHNM4DG4Cniu5F5XE8HpmKY8F/heGXFZUI+w6htA4e3WzekVCiVH8/91act+GbqjLPjVcQs7ZD5mA9LR4+9x6AIk=; Hi there, I'm trying to build a hello world driver on a G5 using gcc 4.0. Wondering what the solution(s) has been to the following error. Cheers Dave /* We need a way to get rid of compiler warnings when we cast from */ /* a 64 bit value to an address that is 32 bits. */ /* We know at this point the cast is harmless but sometime in */ /* the future it may not be. */ /* When size of an int is no longer equal to size of uintptr_t then */ /* the compile will fail and we know we need to fix our cast. */ #include <stdint.h> #ifndef __CAST_DOWN_CHECK #define __CAST_DOWN_CHECK typedef char __NEED_TO_CHANGE_CAST_DOWN[ sizeof(uintptr_t) == sizeof(int) ? 0 : -1 ]; #define CAST_DOWN( type, addr ) ( ((type)((uintptr_t) (addr))) ) #endif /* __CAST_DOWN_CHECK */ ____________________________________________________ Yahoo! Canada Toolbar: Search from anywhere on the web, and bookmark your favourite sites. Download it now at http://ca.toolbar.yahoo.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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replacement routine
by Chris Neustrup 17 Nov '07

17 Nov '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Thunderbird 1.5.0.7 (X11/20070925) Thanks, Chris _______________________________________________ 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.… Hi all, I need a Mac equivalent of the BSD routine bus_space_read_4 or linux readl. This email sent to site_archiver(a)lists.apple.com

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Re: task_for_pid() and code signing
by Quinn 16 Nov '07

16 Nov '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com <http://www.lists.apple.com/apple-cdsa> 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 5:19 -0800 16/11/07, Mark Feldman wrote: Is there a way to embed the SecTaskAccess key, normally in Info.plist in the executable itself? You might want to ask this over on the Apple-CDSA mailing list, where the folks responsible for code signing hang out. This email sent to site_archiver(a)lists.apple.com

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task_for_pid() and code signing
by Mark Feldman 16 Nov '07

16 Nov '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:Date:From:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=ySN0zXN119YAbtnFY7C6Q6FnZGlO7qwEvdvk87oTZ0TNwQCMNq29JJu96EKSr+MbNP2zfbNGspiYbWWns6HTDlwtZRJdi51DgUAWPUHZ3i0lN1l1JgQrfilBWexz/RcZZHxawnahnU42hnIyi/iDLCjRUu+HeW3ymJmwSaBaL5Q=; Hi all, I'm trying to use task_for_pid() in darwin 9.0 (using leopard) I found that taskgated controls the access to this call and currently it allows the old security mechanism (belonging to the "procmod" group) to work. The new security mechanism is to to create the SecTaskAccess key in Info.plist and sign my code. The problem I'm hoping someone can help me with is how to produce a signed command line tool (no Info.plist) that can call task_for_pid (of course without using the old security mechanism). Is there a way to embed the SecTaskAccess key, normally in Info.plist in the executable itself? Many thanks! ____________________________________________________________________________________ Get easy, one-click access to your favorites. Make Yahoo! your homepage. http://www.yahoo.com/r/hs _______________________________________________ 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: missing driver function names
by Jeremy Pereira 16 Nov '07

16 Nov '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 16 Nov 2007, at 01:11, Chris Neustrup wrote: #0 0x001a9fb3 in Debugger () #1 0x00128d08 in panic () #2 0x001a4a55 in kernel_trap () #3 0x0019aeb4 in lo_alltraps () #4 0x0012eaad in lck_mtx_sleep_deadline () #5 0x00347413 in uiomove () #6 0x0034788e in msleep () #7 0x8e701669 in ?? () #8 0x8e7018ff in ?? () #9 0x8e6f985a in ?? () #10 0x0038d522 in IOService::startCandidate () #11 0x0038eda1 in IOService::probeCandidates () #12 0x0038e609 in IOService::doServiceMatch () #13 0x0038fd4e in _IOConfigThread::main () kextload the driver copy the symbols for debugging kextunload the driver kextload the driver debug Chris _______________________________________________ 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/adc%40jeremyp.net This email sent to adc(a)jeremyp.net _______________________________________________ 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.… I'm using the 2 machine debugging facility over firewire. I've copied all symbols files to a local dir on my debugger machine. When I ask for the backtrace, I get the following: Notice that the symbols for the kernel are OK. The missing ?? are most likely routines in my driver. It points up that the symbols were not built correctly. The address of my load is 0x8E61E000. What am I missing? The -s <directory> option on your kextload most likely and/or the source command in GDB. If you have done all that then it might be that the symbols you have were not generated by the kextload that loaded the driver for this debug session. i.e. if you: the symbol file from the first kextload may not be valid anymore (at least that is my experience on 10.4). This email sent to site_archiver(a)lists.apple.com

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Re: missing driver function names
by Michael Smith 16 Nov '07

16 Nov '07

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Nov 15, 2007, at 5:11 PM, Chris Neustrup wrote: The part where you read the documentation, most likely. = Mike _______________________________________________ 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.… Notice that the symbols for the kernel are OK. The missing ?? are most likely routines in my driver. It points up that the symbols were not built correctly. The address of my load is 0x8E61E000. What am I missing? You haven't generated or loaded relocated symbols for the extensions in question. There's probably a technote or developer documentation on the subject, or you can read the kextload manpage and work it out from there. If you're starting with a crashed system, 'showallkmods' in kgmacros will be a good place to start, though you will need another, still- alive system with the same OS version installed in order to generate symbols. You will find that it's best to generate symbols as you load your driver-under-test and immediately ship them off the test system to your debug system. Kextload has options to break the load/activate process into stages to help debug problems happening during driver start-up. This email sent to site_archiver(a)lists.apple.com

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