x86 c++ exception handling

[Karel Gardas]

Updated patch without debugging leftover.

On 9/12/20 9:41 PM, Karel Gardas wrote:
> On 9/12/20 5:33 AM, Joel Sherrill wrote:
>> I suspect if you want a common floor it is a Pentium II. That's where SMP
>> appeared.
>>
>> We can't sanity check the cpu model if we don't know the rules. And if we
>> know the rules, we should just drop those low models. And error if someone
>> runs on an older model.
> 
> Well, I think we may also change a perspective this way: RSB supports
> pc.set which builds pc686 by default. So this is SMP safe BSP. I guess
> that's what majority of user will use as it is very convenient.
> 
> Once someone would like to build variant of pc386 BSP by hand, we may
> add clear error/warning about SMP being unsupported on the particular
> old BSP.
> 
> Attached patch implements this (clear error). It basically allows
> --enable-smp only for pc686 and pcp4 BSPs.
> 
> Comments welcome!
> 
> Thanks,
> Karel
> 
> 
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