[PATCH] Fix distinction of 32/64bit addresses in MIPS gas

[Thiemo Seufer]

cgd@broadcom.com wrote:
[snip]
> "mips64-elf" tools have, historically, generated:
> 
> 	* 32-bit ELF
> 
> 	* mips3-compatible code (including use of full 64-bit GPRs).
> 
> Unless you say -mlong64, pointers and longs will be 32-bit, but you'll
> use full 64-bit GPRs for 'long long'.
> 
> If you do say -mlong64, you'll get 64-bit pointers and longs, in your
> 64-bit GPRs.
> 
> All with a 32-bit ELF format.  (And, using R_MIPS_64 to represent
> pointers in the object files.)
> 
> I don't really _know_ what ABI it uses.  I had always thought of it as
> "o64", which in my mind was "o32 naively extended for 64-bit GPRs,"
> but really i don't know that that's correct.

Does this mean o64 doesn't allow 64bit addressing?
Btw, is there _any_ description/pamphlet/whatever about what o64 is?

> In fact, I don't really
> _care_ what ABI it uses.  We understand the calling conventions well
> enough for embedded development use, which is where we're using it.

What calling convention does it use?


Thiemo