Linus Torvalds wrote:
Final comment: shouldn't we set up %esp to be correct for the new %ss too?
Well, the 32-bit code needs to set up its own stack, and only it knows
where it wants its stack; we don't guarantee that the stack is valid
when we enter the 32-bit code and we're entering with both INT and NMI
disabled (requiring a stack would probably break all existing users of
the 32-bit entrypoint.)
However, that being said, doing so is trivial, and it might help some
debugging hack; anything that makes debugging easier is a Good Thing[TM].
-hpa
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