Re: [GIT PULL] x86 setup: correct booting on 486 (revised)

H. Peter Anvin
2007-11-05T20:31:46Z

Eric W. Biederman wrote:
>>
>>> 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.
>
> If I had to do it from scratch today I would make the 32-bit entry
> point require a stack, segments and use C calling conventions to pass
> struct boot_params *.
>
> Besides %esi I'm not really fond of requiring anything in the 32bit
> entrypoint. At the same time I totally agree that it is always nice
> to provide way more then you need.
>

Nailing down the interface as hard as possible is a good idea, to avoid
tying your hands for the future.

-hpa