Re: Bus Errors!
Rogier Wolff (R.E.Wolff@BitWizard.nl)
Sun, 8 Feb 1998 16:59:47 +0100 (MET)
Richard B. Johnson wrote:
>
>
> The Intel machines allow access of any sized object at any alignment.
> They run faster if large objects are aligned on their natural boundaries.
>
> For this reason, Intel machines can't produce bus errors from unnatural
> alignments. Further, there are no bus signals (bits) that could possibly
> be operated in the event of some hardware generated error related to the
> bus.
>
> Therefore "bus errors" on Intel machines can't exist. However, some
> poorly-written code may use the SIGBUS signal in some improper way.
In theory: Yes. However in practise, the kernel generates sigbus for a
few special cases. (Look in the function "do_no_page" in mm/memory.c).
Roger.
--
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