1*1031c584SApple OSS DistributionsThis directory contains a universal DEBUG kernel, built for 32-bit and 2*1031c584SApple OSS Distributions64-bit Intel. It includes a dSYM bundle for remote kernel debugging 3*1031c584SApple OSS Distributionsand live kernel debugging. 4*1031c584SApple OSS Distributions 5*1031c584SApple OSS DistributionsINSTALLATION 6*1031c584SApple OSS Distributions 7*1031c584SApple OSS Distributions!!!WARNING!!! These steps will overwrite the default kernel and 8*1031c584SApple OSS DistributionsSystem.kext. Backup all files before attempting these steps. 9*1031c584SApple OSS Distributions 10*1031c584SApple OSS DistributionsTo install the DEBUG kernel, do: 11*1031c584SApple OSS Distributionsbash-3.2$ sudo -s 12*1031c584SApple OSS Distributionsbash-3.2# cd / 13*1031c584SApple OSS Distributionsbash-3.2# ditto /AppleInternal/Developer/Extras/Kernel\ Debugging/System.kext /System/Library/Extensions/System.kext 14*1031c584SApple OSS Distributionsbash-3.2# cp -r /AppleInternal/Developer/Extras/Kernel\ Debugging/mach_kernel* / 15*1031c584SApple OSS Distributionsbash-3.2# chown -R root:wheel /System/Library/Extensions/System.kext /mach_kernel* 16*1031c584SApple OSS Distributionsbash-3.2# chmod -R g-w /System/Library/Extensions/System.kext /mach_kernel* 17*1031c584SApple OSS Distributionsbash-3.2# touch /System/Library/Extensions 18*1031c584SApple OSS Distributionsbash-3.2# shutdown -r now 19*1031c584SApple OSS Distributions 20*1031c584SApple OSS DistributionsREMOTE KERNEL DEBUGGING 21*1031c584SApple OSS Distributions 22*1031c584SApple OSS DistributionsSee the documentation that accompanies the Kernel Debug Kit 23*1031c584SApple OSS Distributions 24*1031c584SApple OSS DistributionsLIVE KERNEL DEBUGGING 25*1031c584SApple OSS Distributions 26*1031c584SApple OSS DistributionsWith the DEBUG kernel installed, set "kmem=1" in your "boot-args" 27*1031c584SApple OSS DistributionsNVRAM variable, reboot, and do: 28*1031c584SApple OSS Distributions 29*1031c584SApple OSS Distributionsbash-3.2$ sudo gdb -a <arch> --quiet /mach_kernel 30*1031c584SApple OSS Distributions(gdb) target darwin-kernel 31*1031c584SApple OSS Distributions(gdb) source /AppleInternal/Developer/Extras/Kernel\ Debugging/kgmacros 32*1031c584SApple OSS DistributionsLoading Kernel GDB Macros package. Type "help kgm" for more info. 33*1031c584SApple OSS Distributions(gdb) attach 34*1031c584SApple OSS DistributionsConnected. 35*1031c584SApple OSS Distributions 36*1031c584SApple OSS Distributions<arch> should reflect the currently booted kernel architecture, either 37*1031c584SApple OSS Distributions"i386" or "x86_64" 38*1031c584SApple OSS Distributions 39*1031c584SApple OSS Distributions 40