Re: [Qemu-devel] [PATCH v3 0/5] disas: add libvixl to support A64 disassembly

[Christopher Covington]

On 02/06/2014 08:54 AM, Michael Matz wrote:
> Hi,
> 
> On Thu, 6 Feb 2014, Peter Maydell wrote:
> 
>> On 6 February 2014 13:45, Michael Matz <address@hidden> wrote:
>>> Hmm, why aren't we simply using the binutils disassembler?  It's also
>>> (C) by ARM, so there shouldn't be any relicensing problems.  And it
>>> does support AdvSIMD and system instructions.
>>
>> It is GPLv3 which is not compatible with GPLv2 which
>> QEMU requires. The contribution process for binutils
>> involves a copyright assignment which means the FSF
>> now have the copyright there, as I understand it.
> 
> The FSF always grants back rights on the contribution to the contributor.  
> ARM could simply double-license their original contribution of the 
> disassembler.

Is dual licensing always possible given a grant-back? What if the contribution
is a derivative of a GPL-3.0 licensed work?

Christopher

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