Re: Compat 32-bit syscall entry from 64-bit task!? [was: Re: [RFC,PATCH 1/2] seccomp_filters: system call filtering using BPF]

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On Tue, Jan 17, 2012 at 6:22 PM, Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:
>> I'm pretty sure this isn't about changing cs or far jumps
>
> He's assuming that code can only run on two code segments and
> not arbitarily switch between them which is a completely incorrect
> assumption.

I think all he needs is to figure out which type of syscall was just
intercepted.  (Obviously arguments in memory are a problem.)
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