Merging 64 bit changes to -HEAD - part 3

[Jayachandran C.]

On Tue, Jun 22, 2010 at 4:10 AM, M. Warner Losh <imp at bsdimp.com> wrote:
> The changes to asm.h change the ABI for all ABIs, no?  Does that
> matter?  The jumpbuf is a user-visible thing...  I'm guessing that we
> can say it is OK, but it sure would be nice if we could MFC this
> change before 8.1-RELEASE (but given the locked-down nature of the
> tree, I'm not hopeful).

Currently, it should not disturb the o32 ABI, since it is inside an ifdef.
In n32/n64 the jmpbuf entries are 64bit and we will use one more
register for GP.

Slightly off-topic,  _JBLEN is 95 for mips, I cannot see a reason for
this value, any hints?

> The other changes I think are good...

JC.