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40 lines
1.3 KiB
Plaintext
40 lines
1.3 KiB
Plaintext
This directory contains a universal DEBUG kernel, built for 32-bit and
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64-bit Intel. It includes a dSYM bundle for remote kernel debugging
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and live kernel debugging.
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INSTALLATION
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!!!WARNING!!! These steps will overwrite the default kernel and
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System.kext. Backup all files before attempting these steps.
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To install the DEBUG kernel, do:
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bash-3.2$ sudo -s
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bash-3.2# cd /
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bash-3.2# ditto /AppleInternal/Developer/Extras/Kernel\ Debugging/System.kext /System/Library/Extensions/System.kext
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bash-3.2# cp -r /AppleInternal/Developer/Extras/Kernel\ Debugging/mach_kernel* /
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bash-3.2# chown -R root:wheel /System/Library/Extensions/System.kext /mach_kernel*
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bash-3.2# chmod -R g-w /System/Library/Extensions/System.kext /mach_kernel*
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bash-3.2# touch /System/Library/Extensions
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bash-3.2# shutdown -r now
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REMOTE KERNEL DEBUGGING
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See the documentation that accompanies the Kernel Debug Kit
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LIVE KERNEL DEBUGGING
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With the DEBUG kernel installed, set "kmem=1" in your "boot-args"
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NVRAM variable, reboot, and do:
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bash-3.2$ sudo gdb -a <arch> --quiet /mach_kernel
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(gdb) target darwin-kernel
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(gdb) source /AppleInternal/Developer/Extras/Kernel\ Debugging/kgmacros
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Loading Kernel GDB Macros package. Type "help kgm" for more info.
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(gdb) attach
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Connected.
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<arch> should reflect the currently booted kernel architecture, either
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"i386" or "x86_64"
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