[coreboot] [PATCH] IRQ service is not returned back.

ron minnich rminnich at gmail.com
Thu Nov 26 19:57:23 CET 2009

On Thu, Nov 26, 2009 at 8:11 AM, Myles Watson <mylesgw at gmail.com> wrote:
>> The basic IRQ handler that is serviced by x86emu module is not
>> returned back to caller.
>> So must be patched.
> I think this patch could use some more explanation, since it's not intuitive
> to set SS to initialcs instead of STACK_SEGMENT.  It doesn't look right.

Yeah, this is weird. initialcs is f000, stack_segment is 1000. It is
hard to believe, but could it be that the stack is more than 64K?
Seems unlikely.

Having the stack at f000:fffe actually seems a really bad idea as that
is the code segment.
I wonder why this works at all?

Thanks for the patch, however, it seems a very important data point.

Another question: where does the emulator put the emulated stack in
physical memory? Does it use the real memory at 0x10000 or something
else? Because it could be a code overwriting problem again.


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