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kvm tools: Document steps to debug kernel using KGDB

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Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
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Sasha Levin
2011-09-19 14:05:56 +03:00
committed by Will Deacon
parent a36eca7b41
commit a28e0fe568
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Documentation/kernel-debugging.txt
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This document explains how to debug a guests' kernel using KGDB.
1. Run the guest:
'kvm run -k [vmlinuz] -p "kgdboc=ttyS1 kgdbwait" --tty 1'
And see which PTY got assigned to ttyS1 (you'll see:
' Info: Assigned terminal 1 to pty /dev/pts/X').
2. Run GDB on the host:
'gdb [vmlinuz]'
3. Connect to the guest (from within GDB):
'target remote /dev/pty/X'
4. Start debugging! (enter 'continue' to continue boot).