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df4fd27737
different context support for 32 vs 64 bit processes. This simply omits the save/restore of the segment selector registers for non 32 bit processes. This avoids the rdmsr/rwmsr juggling when restoring %gs clobbers the kernel msr that holds the gsbase. However, I suspect it might be better to conditionally do this at user<->kernel transition where we wouldn't need to do the juggling in the first place. Or have per-thread extended context save/restore hooks. |
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