1*e3723e1fSApple OSS DistributionsThis directory contains a universal DEBUG kernel, built for 32-bit and 2*e3723e1fSApple OSS Distributions64-bit Intel. It includes a dSYM bundle for remote kernel debugging 3*e3723e1fSApple OSS Distributionsand live kernel debugging. 4*e3723e1fSApple OSS Distributions 5*e3723e1fSApple OSS DistributionsINSTALLATION 6*e3723e1fSApple OSS Distributions 7*e3723e1fSApple OSS Distributions!!!WARNING!!! These steps will overwrite the default kernel and 8*e3723e1fSApple OSS DistributionsSystem.kext. Backup all files before attempting these steps. 9*e3723e1fSApple OSS Distributions 10*e3723e1fSApple OSS DistributionsTo install the DEBUG kernel, do: 11*e3723e1fSApple OSS Distributionsbash-3.2$ sudo -s 12*e3723e1fSApple OSS Distributionsbash-3.2# cd / 13*e3723e1fSApple OSS Distributionsbash-3.2# ditto /AppleInternal/Developer/Extras/Kernel\ Debugging/System.kext /System/Library/Extensions/System.kext 14*e3723e1fSApple OSS Distributionsbash-3.2# cp -r /AppleInternal/Developer/Extras/Kernel\ Debugging/mach_kernel* / 15*e3723e1fSApple OSS Distributionsbash-3.2# chown -R root:wheel /System/Library/Extensions/System.kext /mach_kernel* 16*e3723e1fSApple OSS Distributionsbash-3.2# chmod -R g-w /System/Library/Extensions/System.kext /mach_kernel* 17*e3723e1fSApple OSS Distributionsbash-3.2# touch /System/Library/Extensions 18*e3723e1fSApple OSS Distributionsbash-3.2# shutdown -r now 19*e3723e1fSApple OSS Distributions 20*e3723e1fSApple OSS DistributionsREMOTE KERNEL DEBUGGING 21*e3723e1fSApple OSS Distributions 22*e3723e1fSApple OSS DistributionsSee the documentation that accompanies the Kernel Debug Kit 23*e3723e1fSApple OSS Distributions 24*e3723e1fSApple OSS DistributionsLIVE KERNEL DEBUGGING 25*e3723e1fSApple OSS Distributions 26*e3723e1fSApple OSS DistributionsWith the DEBUG kernel installed, set "kmem=1" in your "boot-args" 27*e3723e1fSApple OSS DistributionsNVRAM variable, reboot, and do: 28*e3723e1fSApple OSS Distributions 29*e3723e1fSApple OSS Distributionsbash-3.2$ sudo gdb -a <arch> --quiet /mach_kernel 30*e3723e1fSApple OSS Distributions(gdb) target darwin-kernel 31*e3723e1fSApple OSS Distributions(gdb) source /AppleInternal/Developer/Extras/Kernel\ Debugging/kgmacros 32*e3723e1fSApple OSS DistributionsLoading Kernel GDB Macros package. Type "help kgm" for more info. 33*e3723e1fSApple OSS Distributions(gdb) attach 34*e3723e1fSApple OSS DistributionsConnected. 35*e3723e1fSApple OSS Distributions 36*e3723e1fSApple OSS Distributions<arch> should reflect the currently booted kernel architecture, either 37*e3723e1fSApple OSS Distributions"i386" or "x86_64" 38*e3723e1fSApple OSS Distributions 39*e3723e1fSApple OSS Distributions 40