Very Computer

There used to be a document on Sun's website that described the Sparc
v8plus ABI.  This allowed the use of some 64-bit regs and some v9
instructions.  

However, the link I used to have is broken, and I can no longer find
any info about the v8plus ABI.

I'm mostly interested in figuring out what it used to say, and how it
changes the sigcontext and what 64-bit registers are preserved on a
context switch.  (I think it was only the %o regs since the register
save area on the stack is only for 32-bit registers.)

Thanks,

Ray

Avoid %l and %i with 64 bit instructions.

Casper
--
Expressed in this posting are my opinions.  They are in no way related
to opinions held by my employer, Sun Microsystems.
Statements on Sun products included here are not gospel and may
be fiction rather than truth.

    >> I'm mostly interested in figuring out what it used to say, and how it
    >> changes the sigcontext and what 64-bit registers are preserved on a
    >> context switch.  (I think it was only the %o regs since the register
    >> save area on the stack is only for 32-bit registers.)

    Casper> %o and %g are saved as those are saved in the kernel context
    Casper> structure and not on the stack.

So the sigcontext will have these 64-bit values?  Tried looking
through the header files briefly but didn't notice 64-bit lengths for
these.

    Casper> Avoid %l and %i with 64 bit instructions.

Thanks for the info.

Some additional questions.  Are the extra FP registers available?
Which v9 instructions are actually allowed?

A pointer to a document would be helpful so I don't have to keep
asking....

But your help is most appreciated!

Ray