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Rev 103 Rev 141
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  + track usage of frames containing middle-level page tables (frame leak)
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  + track usage of frames containing middle-level page tables (frame leak)
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+ get user mode support for all architectures
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+ get user mode support for all architectures
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+ save/restore floating point context on context switch 
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+ save/restore floating point context on context switch 
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  + [ia32] lazy context switch using TS flag [DONE]
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  + [ia32] lazy context switch using TS flag                              [DONE]
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+ [ia32] MMX,SSE1-.. initialization
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+ [ia32] MMX,SSE1-.. initialization
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+ [ia32] review privilege separation
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+ [ia32] review privilege separation
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  + zero IOPL in EFLAGS
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  + zero IOPL in EFLAGS                                                   [DONE]
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  + before IRET (from SYSCALL), zero NT in EFLAGS
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  + before IRET (from SYSCALL), zero NT in EFLAGS                         [DONE]
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+ [ia32] review the cache controling bits in CR0 register
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+ [ia32] review the cache controling bits in CR0 register
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+ [ia32] zero the alignment exception bit in EFLAGS
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+ [ia32] zero the alignment exception bit in EFLAGS
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+ make emulated architectures also work on real hardware
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+ make emulated architectures also work on real hardware
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+ bring in support for other architectures (e.g. PowerPC)
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+ bring in support for other architectures (e.g. PowerPC)
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