Messages in this thread | | | Date | Mon, 05 Nov 2007 10:32:40 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [GIT PULL] x86 setup: correct booting on 486 (revised) |
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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].
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