Messages in this thread |  | | | Date | Mon, 5 Nov 2007 10:36:50 -0800 (PST) | | From | Linus Torvalds <> | | Subject | Re: [GIT PULL] x86 setup: correct booting on 486 (revised) |
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On Mon, 5 Nov 2007, H. Peter Anvin wrote: > > 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.)
I agree. But it would be nice if some basic instructions still worked: as is, you cannot even do things like reloading %eflags, because the only way to do that requires a stack.
> 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].
Yeah. Even if it was just re-using the boot-time stack area temporarily, just to give code the choice to use a common set of instructions.
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