Re: Question on BIGGEST_ALIGNMENT in GCC on NetBSD/m68k

On 16/06/2025 13:01, John Paul Adrian Glaubitz wrote:
> On Mon, 2025-06-16 at 12:07 +0200, Geert Uytterhoeven wrote:
>>> I think you need to change the ABI type in the ELF header:
>>> https://fr.wikipedia.org/wiki/Executable_and_Linkable_Format
>>
>> Interesting....
>>
>> Does any system actually use ABI (byte 7) = 3 (Linux)?
>> All of amd64/arm/arm64/ia64/i386/m68k/microblaze/mips(el)/powerpc/risvc/s390/sh/sparc
>> seem to use 0 (SYSV).
>>
>> #define ELFOSABI_NONE   0
>> #define ELFOSABI_LINUX  3
> 
> Strictly speaking, a value of 0x00 indicates SysV ABI [1].
> 
> But maybe we could use 0x03 for Linux/m68k with 4 bytes alignment.
> 
> Adrian
> 
>> [1] https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#ELF_header
> 

I think an e_flags with a new value like EF_M68K_ABI2 would be more appropriate.

Thanks,
Laurent