Messages in this thread | | | Date | Wed, 18 Jan 2012 18:16:23 -0800 | From | "H. Peter Anvin" <> | Subject | Re: Compat 32-bit syscall entry from 64-bit task!? |
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On 01/18/2012 05:45 PM, Indan Zupancic wrote: > > For security reasons it should be impossible for userspace to set those bits > themselves, otherwise the tracer can be easily fooled on an old kernel. That > seems to be the case for the higher bits of eflags, so eflags would work. And > the current code checks cs, also checking eflags would be very easy to add. >
I think this goes without saying, and isn't an issue for the options currently on the table (including regset).
-phpa
-- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.
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