1*0f4c859eSApple OSS DistributionsThis directory contains a universal DEBUG kernel, built for 32-bit and 2*0f4c859eSApple OSS Distributions64-bit Intel. It includes a dSYM bundle for remote kernel debugging 3*0f4c859eSApple OSS Distributionsand live kernel debugging. 4*0f4c859eSApple OSS Distributions 5*0f4c859eSApple OSS DistributionsINSTALLATION 6*0f4c859eSApple OSS Distributions 7*0f4c859eSApple OSS Distributions!!!WARNING!!! These steps will overwrite the default kernel and 8*0f4c859eSApple OSS DistributionsSystem.kext. Backup all files before attempting these steps. 9*0f4c859eSApple OSS Distributions 10*0f4c859eSApple OSS DistributionsTo install the DEBUG kernel, do: 11*0f4c859eSApple OSS Distributionsbash-3.2$ sudo -s 12*0f4c859eSApple OSS Distributionsbash-3.2# cd / 13*0f4c859eSApple OSS Distributionsbash-3.2# ditto /AppleInternal/Developer/Extras/Kernel\ Debugging/System.kext /System/Library/Extensions/System.kext 14*0f4c859eSApple OSS Distributionsbash-3.2# cp -r /AppleInternal/Developer/Extras/Kernel\ Debugging/mach_kernel* / 15*0f4c859eSApple OSS Distributionsbash-3.2# chown -R root:wheel /System/Library/Extensions/System.kext /mach_kernel* 16*0f4c859eSApple OSS Distributionsbash-3.2# chmod -R g-w /System/Library/Extensions/System.kext /mach_kernel* 17*0f4c859eSApple OSS Distributionsbash-3.2# touch /System/Library/Extensions 18*0f4c859eSApple OSS Distributionsbash-3.2# shutdown -r now 19*0f4c859eSApple OSS Distributions 20*0f4c859eSApple OSS DistributionsREMOTE KERNEL DEBUGGING 21*0f4c859eSApple OSS Distributions 22*0f4c859eSApple OSS DistributionsSee the documentation that accompanies the Kernel Debug Kit 23*0f4c859eSApple OSS Distributions 24*0f4c859eSApple OSS DistributionsLIVE KERNEL DEBUGGING 25*0f4c859eSApple OSS Distributions 26*0f4c859eSApple OSS DistributionsWith the DEBUG kernel installed, set "kmem=1" in your "boot-args" 27*0f4c859eSApple OSS DistributionsNVRAM variable, reboot, and do: 28*0f4c859eSApple OSS Distributions 29*0f4c859eSApple OSS Distributionsbash-3.2$ sudo gdb -a <arch> --quiet /mach_kernel 30*0f4c859eSApple OSS Distributions(gdb) target darwin-kernel 31*0f4c859eSApple OSS Distributions(gdb) source /AppleInternal/Developer/Extras/Kernel\ Debugging/kgmacros 32*0f4c859eSApple OSS DistributionsLoading Kernel GDB Macros package. Type "help kgm" for more info. 33*0f4c859eSApple OSS Distributions(gdb) attach 34*0f4c859eSApple OSS DistributionsConnected. 35*0f4c859eSApple OSS Distributions 36*0f4c859eSApple OSS Distributions<arch> should reflect the currently booted kernel architecture, either 37*0f4c859eSApple OSS Distributions"i386" or "x86_64" 38*0f4c859eSApple OSS Distributions 39*0f4c859eSApple OSS Distributions 40