Re: AMD Geode NOPL emulation for kernel 2.6.36-rc2

From: Avi Kivity
Date: Sun Aug 29 2010 - 08:53:10 EST


On 08/28/2010 02:07 AM, H. Peter Anvin wrote:
On 08/27/2010 02:32 PM, Matteo Croce wrote:
can I ignore the return value when I expect val to be non zero?
the doc says: "On error, the variable @x is set to zero."
No. You need to deliver a page fault to the application in this case.

The *real* test for this kind of crap is correct page fault behavior,
and so forth.

Also, at the very least you need to check for:

- CS == USER_CS

Is that mandated by the ABI? Is it illegal for an application to load a segment with a nonzero base into the LDT and use it for CS?

What about vm86?

--
error compiling committee.c: too many arguments to function

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