site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Importance: Normal Hi, In my driver one thread my_Thread is created using IOKit API IOCreatThread(). This thread does processing of Asynchronous events. This thread runs a while(1) loop, and inside while loop waits on a semaphore created using semaphore_create( waiting, SYNC_FIFO_POLICY). whenever any interrupts arrives from the PCI card, isr is handled via HandleInterrupt(), and after completing isr, at the end it signal the my_Thread using semaphore_signal(waiting). With this implantation I get kernel panic at Unresolved kernel trap(cpu 1): 0x400 - Inst access DAR=0x0000000002279000 PC=0x0000000000000000 Latest crash info for cpu 1: Exception state (sv=0x1DE5E500) PC=0x00000000; MSR=0x40009030; DAR=0x02279000; DSISR=0x40000000; LR=0x00288520; R1=0x0CD9B9F0; XCP=0x00000010 (0x400 - Inst access) Backtrace: back trace shows this: --------------------------------------------------- 0x241998 <IOLibInit+220>: mflr r0 (gdb) x/i 0x002419D4 0x2419d4 <IOLibInit+280>: lwz r0,88(r1) (gdb) x/i 0x1E58DCC8 0x1e58dcc8 <my_Thread+5480>: lwz r2,64(r30) (gdb) x/i 0x1E5A126C 0x1e5aa8c4 <_ZN31com_myCompany_driver_HBAdriver20CompleteParallelTaskEP8OSObject14SCSIT askStatus19SCSIServiceResponse+72>: lwz r1,0(r1) (gdb) x/i 0x1E57AEC0 0x1e57aec0 <_ZN33IOSCSIParallelInterfaceController20CompleteParallelTaskEP8OSObject14SC SITaskStatus19SCSIServiceResponse+104>: lwz r0,88(r1) (gdb) x/i 0x1E57D57C 0x1e57d57c <_ZN29IOSCSIParallelInterfaceDevice16CompleteSCSITaskEP8OSObject19SCSIServic eResponse14SCSITaskStatus+332>: lwz r0,204(r30) (gdb) (gdb) x/i 0x003B4B24 0x3b4b24 <zombproc+405712>: xoris r4,r10,25974 (gdb) x/i 0x00241998 (gdb) x/i 0x003B4884 0x3b4884 <zombproc+405040>: andi. r13,r19,25957 Why I get kernel panic on this zombproc and why my driver jump to zombproc function from the driver thread? How can I avoid my driver to jump to zomproc? Regards, Parav Pandit _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... This email sent to site_archiver@lists.apple.com