1*2c2f96dcSApple OSS DistributionsThis directory contains a universal DEBUG kernel, built for 32-bit and 2*2c2f96dcSApple OSS Distributions64-bit Intel. It includes a dSYM bundle for remote kernel debugging 3*2c2f96dcSApple OSS Distributionsand live kernel debugging. 4*2c2f96dcSApple OSS Distributions 5*2c2f96dcSApple OSS DistributionsINSTALLATION 6*2c2f96dcSApple OSS Distributions 7*2c2f96dcSApple OSS Distributions!!!WARNING!!! These steps will overwrite the default kernel and 8*2c2f96dcSApple OSS DistributionsSystem.kext. Backup all files before attempting these steps. 9*2c2f96dcSApple OSS Distributions 10*2c2f96dcSApple OSS DistributionsTo install the DEBUG kernel, do: 11*2c2f96dcSApple OSS Distributionsbash-3.2$ sudo -s 12*2c2f96dcSApple OSS Distributionsbash-3.2# cd / 13*2c2f96dcSApple OSS Distributionsbash-3.2# ditto /AppleInternal/Developer/Extras/Kernel\ Debugging/System.kext /System/Library/Extensions/System.kext 14*2c2f96dcSApple OSS Distributionsbash-3.2# cp -r /AppleInternal/Developer/Extras/Kernel\ Debugging/mach_kernel* / 15*2c2f96dcSApple OSS Distributionsbash-3.2# chown -R root:wheel /System/Library/Extensions/System.kext /mach_kernel* 16*2c2f96dcSApple OSS Distributionsbash-3.2# chmod -R g-w /System/Library/Extensions/System.kext /mach_kernel* 17*2c2f96dcSApple OSS Distributionsbash-3.2# touch /System/Library/Extensions 18*2c2f96dcSApple OSS Distributionsbash-3.2# shutdown -r now 19*2c2f96dcSApple OSS Distributions 20*2c2f96dcSApple OSS DistributionsREMOTE KERNEL DEBUGGING 21*2c2f96dcSApple OSS Distributions 22*2c2f96dcSApple OSS DistributionsSee the documentation that accompanies the Kernel Debug Kit 23*2c2f96dcSApple OSS Distributions 24*2c2f96dcSApple OSS DistributionsLIVE KERNEL DEBUGGING 25*2c2f96dcSApple OSS Distributions 26*2c2f96dcSApple OSS DistributionsWith the DEBUG kernel installed, set "kmem=1" in your "boot-args" 27*2c2f96dcSApple OSS DistributionsNVRAM variable, reboot, and do: 28*2c2f96dcSApple OSS Distributions 29*2c2f96dcSApple OSS Distributionsbash-3.2$ sudo gdb -a <arch> --quiet /mach_kernel 30*2c2f96dcSApple OSS Distributions(gdb) target darwin-kernel 31*2c2f96dcSApple OSS Distributions(gdb) source /AppleInternal/Developer/Extras/Kernel\ Debugging/kgmacros 32*2c2f96dcSApple OSS DistributionsLoading Kernel GDB Macros package. Type "help kgm" for more info. 33*2c2f96dcSApple OSS Distributions(gdb) attach 34*2c2f96dcSApple OSS DistributionsConnected. 35*2c2f96dcSApple OSS Distributions 36*2c2f96dcSApple OSS Distributions<arch> should reflect the currently booted kernel architecture, either 37*2c2f96dcSApple OSS Distributions"i386" or "x86_64" 38*2c2f96dcSApple OSS Distributions 39*2c2f96dcSApple OSS Distributions 40