m68k ELF: e_flags bit for m68000 executables?

[Matt Fredette]

> Hi Matt,
> 
> > binutils' include/elf/m68k.h defines EF_CPU32, and I could use
> > an EF_M68000.
> 
> Any particular reason why ?

I'm working on NetBSD for the sun2 machines, which only have 68010s.
The 68000 and 68010 are missing a small number of instructions and 
addressing modes that appeared starting on the 020, so I need to know 
if a binary is "safe" for me to run.

> > I don't have the m68k SYSV ABI supplement; does it specify such a
> > flag?
> 
> Unknown.  The ABI does not appear to be in the public domain, so I
> cannot answer this question.
> 
> > If not, since I bet the m68k ABI is ownerless, can we
> > agree on a value?
> 
> How about 0x00100000 ?  [Chosen not to intersect with EF_CPU32 incase
> those two bits have extra significance not documented in the sources.
> Chosen to be higher than EF_CPU32 in case the lower bits have some
> significance in the (missing) ABI.]

Sounds good to me.  I'll put together a patch shortly.

> > (Why is EF_CPU32 not a single bit?)
> 
> I have no idea - it does seem very strange though.

Thanks!

Matt

-- 
Matt Fredette
http://mit.edu/fredette/www