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Date: Fri, 9 Aug 2013 21:25:34 +0400
Message-ID: <CAMo8BfLuHrbEs_1Jv8dDWA6T3cxpqFvFMHQrvwYChV56Fw+Wfg@mail.gmail.com>
From: Max Filippov <jcmvbkbc@gmail.com>
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Subject: Re: [Qemu-devel] GDB debugging of QEMU.
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: Yaodong Yang <yaodong.yangy@gmail.com>, qemu-devel@nongnu.org

On Fri, Aug 9, 2013 at 9:14 PM, Peter Maydell <peter.maydell@linaro.org> wrote:
> On 9 August 2013 18:11, Yaodong Yang <yaodong.yangy@gmail.com> wrote:
>> 2. how to invoke QEMU with gdb,
>> because my previous attempt failed. "gdb sudo
>> /usr/local/kvm/bin/qemu-system/x86_64 -s -enable-kvm -hda"
>
> This won't work because you're running gdb as your own
> user and attempting to debug a program running as root.
> 'sudo gdb qemu-system-x86_64 ...' will probably work.
>
> (Also, you almost certainly want to run gdb on the binary
> that you just built rather than on the binary in
> /usr/local/kvm/bin which is presumably whatever older
> version was last installed.)

You also need --args when you pass arguments to the application
being debugged, so the command line looks like

sudo gdb --args /usr/local/kvm/bin/qemu-system/x86_64 -s -enable-kvm -hda

-- 
Thanks.
-- Max