1*a325d9c4SApple OSS DistributionsThis directory contains a universal DEBUG kernel, built for 32-bit and 2*a325d9c4SApple OSS Distributions64-bit Intel. It includes a dSYM bundle for remote kernel debugging 3*a325d9c4SApple OSS Distributionsand live kernel debugging. 4*a325d9c4SApple OSS Distributions 5*a325d9c4SApple OSS DistributionsINSTALLATION 6*a325d9c4SApple OSS Distributions 7*a325d9c4SApple OSS Distributions!!!WARNING!!! These steps will overwrite the default kernel and 8*a325d9c4SApple OSS DistributionsSystem.kext. Backup all files before attempting these steps. 9*a325d9c4SApple OSS Distributions 10*a325d9c4SApple OSS DistributionsTo install the DEBUG kernel, do: 11*a325d9c4SApple OSS Distributionsbash-3.2$ sudo -s 12*a325d9c4SApple OSS Distributionsbash-3.2# cd / 13*a325d9c4SApple OSS Distributionsbash-3.2# ditto /AppleInternal/Developer/Extras/Kernel\ Debugging/System.kext /System/Library/Extensions/System.kext 14*a325d9c4SApple OSS Distributionsbash-3.2# cp -r /AppleInternal/Developer/Extras/Kernel\ Debugging/mach_kernel* / 15*a325d9c4SApple OSS Distributionsbash-3.2# chown -R root:wheel /System/Library/Extensions/System.kext /mach_kernel* 16*a325d9c4SApple OSS Distributionsbash-3.2# chmod -R g-w /System/Library/Extensions/System.kext /mach_kernel* 17*a325d9c4SApple OSS Distributionsbash-3.2# touch /System/Library/Extensions 18*a325d9c4SApple OSS Distributionsbash-3.2# shutdown -r now 19*a325d9c4SApple OSS Distributions 20*a325d9c4SApple OSS DistributionsREMOTE KERNEL DEBUGGING 21*a325d9c4SApple OSS Distributions 22*a325d9c4SApple OSS DistributionsSee the documentation that accompanies the Kernel Debug Kit 23*a325d9c4SApple OSS Distributions 24*a325d9c4SApple OSS DistributionsLIVE KERNEL DEBUGGING 25*a325d9c4SApple OSS Distributions 26*a325d9c4SApple OSS DistributionsWith the DEBUG kernel installed, set "kmem=1" in your "boot-args" 27*a325d9c4SApple OSS DistributionsNVRAM variable, reboot, and do: 28*a325d9c4SApple OSS Distributions 29*a325d9c4SApple OSS Distributionsbash-3.2$ sudo gdb -a <arch> --quiet /mach_kernel 30*a325d9c4SApple OSS Distributions(gdb) target darwin-kernel 31*a325d9c4SApple OSS Distributions(gdb) source /AppleInternal/Developer/Extras/Kernel\ Debugging/kgmacros 32*a325d9c4SApple OSS DistributionsLoading Kernel GDB Macros package. Type "help kgm" for more info. 33*a325d9c4SApple OSS Distributions(gdb) attach 34*a325d9c4SApple OSS DistributionsConnected. 35*a325d9c4SApple OSS Distributions 36*a325d9c4SApple OSS Distributions<arch> should reflect the currently booted kernel architecture, either 37*a325d9c4SApple OSS Distributions"i386" or "x86_64" 38*a325d9c4SApple OSS Distributions 39*a325d9c4SApple OSS Distributions 40