Re: Question on BIGGEST_ALIGNMENT in GCC on NetBSD/m68k

[Laurent Vivier <laurent@vivier.eu>]

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