> When stopping the guest with -S before it booted, gdb will interrupt it
> while it is still in 16-bit real mode. Later on, when Linux runs, the
> guest is in 64-bit protected mode. gdb is not prepared for such a
> switch. All you can do:

Try

set arch i386:x86-64

in the GDB prompt.

-- 
Thanks.
-- Max

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