Re: [PATCH for-5.0?] linux-user/ppc: Fix padding in mcontext_t for ppc64

[Richard Henderson]

On 4/7/20 7:10 PM, David Gibson wrote:
>> Should we in fact disable ppc64abi32?
>> I can't see how it could work enough to be useful as-is.
> 
> Yeah, I think so.  Last time we had a problem in this area, I couldn't
> even figure out what ppc64abi32 was supposed to *be*, let alone what
> the use case for it is.  Given that, it's hard to imagine it's been
> working (whatever that means) any time recently.

What it's *supposed* to be is a ppc32 binary running on a 64-bit cpu, e.g. a
32-bit binary on power7 with the kernel's compat syscalls.  You get to do
native 64-bit arithmetic and have 32-bit pointers.

I guess there's a kind of a use case there somewhere, but it's rather niche,
and someone has to care more than they have until now.


r~