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Date: Thu, 27 Feb 2014 21:21:43 +0800
From: Xuebing wang <xbing6@gmail.com>
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Subject: Re: [Qemu-devel] Debugging aarch64 guest running on Foundationv8
 model
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To: Peter Maydell <peter.maydell@linaro.org>, Jani Kokkonen <janimikokkonen@gmail.com>
Cc: Claudio Fontana <hw.claudio@gmail.com>, QEMU Developers <qemu-devel@nongnu.org>

Hi Jani,

Is below video similar to what you want? This video shows cross-debug 
armv8 linux kernel (using armv8-gdb + armv8-qemu).

http://www.youtube.com/watch?v=MLu5EzheHIM


On 02/27/2014 05:52 PM, Peter Maydell wrote:
> On 27 February 2014 09:45, Jani Kokkonen <janimikokkonen@gmail.com> wrote:
>> Hi,
>>
>> I would like to debug a Qemu guest linux kernel under Foundationv8 model and
>> I tried  the following setup:
>>
>> 1.  Foundationv8 model started with --network=nat and
>> --network-nat-ports=1234=1234 options
>> 2. In Foundationv8 model I started qemu-system-aarch64 with the command
>> line:
>>
>> ./qemu-system-aarch64  -M virt -cpu host  -kernel Image -serial stdio
>> -display none  -enable-kvm -gdb tcp::1234 -S
>>
>> 3. I start debugging the guest kernel with aarch64-linux-gnu-gdb vmlinux
>> and with target remote:1234 command.
>>
>> However when I set any breakpoint I will get error message:
>> "Cannot insert breakpoint 1.
>> Error accessing memory address 0xffffffc000636498: Unknown error -1"
>> In addition stepi or any other run related command does not work.
> You would need to implement breakpoint support for AArch64 in
> both KVM and QEMU, I think. That feature is currently not implemented.
>
> thanks
> -- PMM
>
>

-- 
Thanks,
Xuebing Wang