Re: Question on BIGGEST_ALIGNMENT in GCC on NetBSD/m68k

Le 16/06/2025 à 11:15, John Paul Adrian Glaubitz a écrit :
> On Mon, 2025-06-16 at 11:10 +0200, Laurent Vivier wrote:
>>
>> Le 16/06/2025 à 11:00, John Paul Adrian Glaubitz a écrit :
>>>> And there will be a problem with binfmt_misc because we can't rely on
>>>> the ELF signature to know which qemu-user to run, the one with 2byte
>>>> alignment or the one with 4byte alignment?
>>> What about the ELF note [1] that David Brownlee suggested? Can these be used?
>>>
>>> Adrian
>>>
>>>> [1]https://www.netbsd.org/docs/kernel/elf-notes.html
>>
>> binfmt_misc doesn't use the sections to select the interpreter, but the
>> 128 first bytes of the file.
>>
>> I think you need to change the ABI type in the ELF header:
>> https://fr.wikipedia.org/wiki/Executable_and_Linkable_Format
> 
> How does binfmt_misc handle the various MIPS ABIs then?

It doesn't and it's a problem.

Thanks,
Laurent