Re: [Qemu-devel] Failed to use gdb with qemu 15.1 (with and without kvm support)

[Jan Kiszka]

On 2012-01-22 20:58, Francis Moreau wrote:
> On Sun, Jan 22, 2012 at 8:21 PM, Jan Kiszka <address@hidden> wrote:
>> On 2012-01-22 20:16, Max Filippov wrote:
>>>> 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.
>>>
>>
>> Won't help if gdb already connected in 16/32-bit before.
> 
> Why not ? is it a gdb bug ?

More than a bug, a deficit in the x86 target management of gdb. Requires
some work, but gdb people are at least aware of the issue.

Jan

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