Messages in this thread | | | Date | Tue, 17 Dec 2002 12:13:04 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | Re: Intel P6 vs P7 system call performance |
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On Tue, 17 Dec 2002, Manfred Spraul wrote:
> > > > > > pushl %ebp > > movl $0xfffff000, %ebp > > call *%ebp > > popl %ebp > > > > > > You could avoid clobbering a register with something like > > pushl $0xfffff000 > call *(%esp) > addl %esp,4 >
This is a near 'call'.
pushl $0xfffff000 ret
This is a 'far' 'call' that I think you will need to reload the segment back to user-mode segments on the return.
pushl $KERNEL_CS pushl $0xfffff000 lret
Cheers, Dick Johnson Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips). Why is the government concerned about the lunatic fringe? Think about it.
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