On Wed, 26 May 2021, Jason Thorpe wrote:
...
The alpha code has, for a very long time, always advanced the PC past
the faulting instruction on an arithmetic trap[1]. This, in essence,
makes it behave exactly as if the exception were disabled, while still
giving the handler a chance to "do something").
But the x86_64 code appears to return to the same instruction,
banging its head against the proverbial wall.
It's my belief that the alpha behavior is more desirable.
I agree. To me, the x86_64 behaviour as reported sounds quite "sub-
optimal" and rather unuseful.
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