Re: [PATCH] framework for building modules externally

[Christian Franke]

Robert Millan wrote:
> > ...
> > How do you treat differences in ABI ?
> >
> > Dis-allow loading of module with different value of ABI ? Or were you
> > planning that module itself adapts to different versions of GRUB 2 ABI's?
> >     
>
> The module itself could:
>
> GRUB_MOD_INIT(foo)
> {
>   if (grub_abi != GRUB_ABI)
>     {
>       grub_printf ("abi mismatch!\n");
>       return;
>     }
>
>   /* register our commands/terminals/disks/whatever */
> }
>
>   

Alternative: Export a symbol describing the ABI version in kernel 
("grub_abi_3_14"). Access this symbol in each module (this can be hidden 
in GRUB_MOD_INIT).

Then loading a module with wrong ABI version fails due to undefined symbol.

--
Christian Franke