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nailer
on Jan 30, 2014
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Slabbed-or-not: Detect if your VPS container is ru...
CPUID is available in /proc/cpuinfo (or whatever the /sys or modern equivalent is, my Linux is a bit rusty)
Not sure re: UD2 though.
nenolod
on Jan 30, 2014
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The point here is that the information in /proc/cpuinfo is virtualized, and therefore may not reflect reality...
nailer
on Jan 30, 2014
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Would you have to be a kernel module to access the CPU directly?
aryastark
on Jan 30, 2014
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No. All binary programs access the CPU directly. Only certain instructions require being in a certain "ring" (i.e. access level). The CPUID instruction is non-privileged, meaning you can access it from user space.
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Not sure re: UD2 though.