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

Re Remote Debugging
by Anshul Makkar 26 May '05

26 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Mozilla Thunderbird 1.0.2 (Macintosh/20050317) Jonas Maebe wrote: On 26 mei 2005, at 15:17, Anshul Makkar wrote: That there is no debug information available for the function. display/1i $pc To turn it off later: undisplay 1 (or whatever display number was assigned to the display command). To simply print the disassembly of the the current function: disassemble To print the instructions in a particular range of memory: disassemble start_address stop_address or x/10i start_address (to print 10 instructions, with the first one at "start") Jonas This email sent to anshul.makkar(a)samsung.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.… Hello , display/li $pc display the expression.With the help of it I am not perform step debugging. After setting display/li $pc what else has to be done . I want that whenever jump or call instruction comes I should be able to jump to new location or function . ie I want to debug every step so that I can follow the complete path . Please help . If possible give further detail on the above point or suggest me some links from where I can get detailed information regarding GDB and its operation . Actually I want to completely understand the flow of graphics kext . Thanks step-mode on. But then also if I press 's' for step in it just shows the function name. Actually when I press s , control goes to next instruction , but instead of showing the disassembled code it just shows the name of the function . What can be the problem, how can I show the disassembled code instruction by instruction . _______________________________________________ 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/anshul.makkar%40samsun… This email sent to site_archiver(a)lists.apple.com

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Re: Remote debugging
by Jonas Maebe 26 May '05

26 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 26 mei 2005, at 15:17, Anshul Makkar wrote: That there is no debug information available for the function. display/1i $pc To turn it off later: undisplay 1 (or whatever display number was assigned to the display command). To simply print the disassembly of the the current function: disassemble To print the instructions in a particular range of memory: disassemble start_address stop_address or x/10i start_address (to print 10 instructions, with the first one at "start") Jonas _______________________________________________ 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.… step-mode on. But then also if I press 's' for step in it just shows the function name. Actually when I press s , control goes to next instruction , but instead of showing the disassembled code it just shows the name of the function . What can be the problem, how can I show the disassembled code instruction by instruction . This email sent to site_archiver(a)lists.apple.com

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Remote debugging
by Anshul Makkar 26 May '05

26 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com User-agent: Mozilla Thunderbird 1.0.2 (Macintosh/20050317) _______________________________________________ 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.… Hello, I am doing remote debugging of graphics kext . After stoopping at a perticular break point I am not able to step into the function . I haven given set step-mode on. But then also if I press 's' for step in it just shows the function name. Actually when I press s , control goes to next instruction , but instead of showing the disassembled code it just shows the name of the function . What can be the problem, how can I show the disassembled code instruction by instruction . for eg (gdb) s 0x0008dd6c in ppc_usimple_lock () (gdb) s 0x0008dd70 in ppc_usimple_lock () (gdb) s 0x0008dd74 in ppc_usimple_lock () (gdb) s 0x0008dd78 in ppc_usimple_lock () (gdb) s 0x0008dd7c in ppc_usimple_lock () (gdb) s 0x0008dd80 in ppc_usimple_lock () (gdb) s 0x0008dd84 in ppc_usimple_lock () (gdb) s 0x0008dd88 in ppc_usimple_lock () (gdb) s This email sent to site_archiver(a)lists.apple.com

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Re: kauth and creds in Darwin 8
by Andrew Gallatin 26 May '05

26 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Sam Vaughan writes: > On 26/05/2005, at 2:48 PM, Sam Vaughan wrote: > > > What does a dependency on the kernel itself look like in a kext's > > OSBundleLibraries dict? > > This seems to do the trick: > > <key>com.apple.kernel</key> > <string>8.1.0</string> > > ... but I assume it'll then refuse to load when I install 10.4.2. Yep. It will break every time your customers upgrade. :-( 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: kauth and creds in Darwin 8
by Sam Vaughan 26 May '05

26 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 26/05/2005, at 2:48 PM, Sam Vaughan wrote: This seems to do the trick: <key>com.apple.kernel</key> <string>8.1.0</string> ... but I assume it'll then refuse to load when I install 10.4.2. Sam _______________________________________________ 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.… What does a dependency on the kernel itself look like in a kext's OSBundleLibraries dict? This email sent to site_archiver(a)lists.apple.com

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Re: kauth and creds in Darwin 8
by Sam Vaughan 26 May '05

26 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 26/05/2005, at 2:48 PM, Sam Vaughan wrote: P.S. I've raised this issue as Radar 4131056 Sam _______________________________________________ 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.… crget(), crfree(), crdup() etc. have all been removed from the Darwin 8 kernel. The equivalent functions appear to be kauth_cred_alloc(), kauth_cred_rele(), kauth_cred_dup() etc. but they aren't exported. I assume that the kauth KPI is still a work in progress, especially considering there are declarations like kauth_cred_unref() in sys/kauth.h for which there's no kernel implementation. This email sent to site_archiver(a)lists.apple.com

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kauth and creds in Darwin 8
by Sam Vaughan 26 May '05

26 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Sam _______________________________________________ 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.… crget(), crfree(), crdup() etc. have all been removed from the Darwin 8 kernel. The equivalent functions appear to be kauth_cred_alloc(), kauth_cred_rele(), kauth_cred_dup() etc. but they aren't exported. I assume that the kauth KPI is still a work in progress, especially considering there are declarations like kauth_cred_unref() in sys/ kauth.h for which there's no kernel implementation. My question is what I should do in the meantime? Should I declare a dependency on the kernel itself and maintain this from release to release until there's an exported KPI? What does a dependency on the kernel itself look like in a kext's OSBundleLibraries dict? This email sent to site_archiver(a)lists.apple.com

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encryption in kernel
by Herbert 26 May '05

26 May '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.… Does anyone know of an encryption library and/or source that can be used in a kernel extension? This email sent to site_archiver(a)lists.apple.com

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posting message from kernel extension
by Herbert 26 May '05

26 May '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.… Does anyone know how to do this? I've found some docs on receiving them, but nothing on posting them as of yet. I'm sure it exists somewhere... This email sent to site_archiver(a)lists.apple.com

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Re: kld(): Undefined symbols: sysctl
by Sam Vaughan 25 May '05

25 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi Alexey, (no need to require 10.4.1, so 8.0.0 will do) Unfortunately there seem to be no matches for sysctl__hw_children: So you'll probably have to work out how to avoid using it in your kext. Sam On 26/05/2005, at 7:40 AM, Alexey Manannikov <alex(a)alxsoft.com> wrote: Hello! After upgrading to Tiger/Xcode 2.0 I receive this errors with loading my kext: kextload: sending 1 personality to the kernel kld(): Undefined symbols: _sysctl__hw_children _sysctl_register_oid _sysctl_unregister_oid kextload: kld_load_from_memory() failed for module What I need to make it work on Tiger? _______________________________________________ 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.… First you need to find out what your kext's kernel dependencies are. There were a couple of threads about this back in April on this list. Essentially, to find your two "oid" symbols: % cd /System/Library/Extensions/System.kext/PlugIns % find . -type f -a ! -name "*.plist" | xargs nm -o | egrep 'sysctl_ (un)?register_oid' ./BSDKernel.kext/BSDKernel: U _sysctl_register_oid ./BSDKernel.kext/BSDKernel: U _sysctl_unregister_oid % cat BSDKernel.kext/Info.plist | grep -A1 CFBundleIdentifier <key>CFBundleIdentifier</key> <string>com.apple.kpi.bsd</string> % cat BSDKernel.kext/Info.plist | grep -A1 CFBundleShortVersionString <key>CFBundleShortVersionString</key> <string>8.1.0</string> So you need to make sure your kext's Info.plist contains the following dependency in its OSBundleLibraries dict: <key>com.apple.kpi.bsd</key> <string>8.0.0</string> % find . -type f -a ! -name "*.plist" | xargs nm -o | grep sysctl__hw_children Alexey This email sent to site_archiver(a)lists.apple.com

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