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On Tue, Dec 17, 2002 at 10:57:29AM -0800, Ulrich Drepper wrote: > But this is exactly what I expect to happen. If you want to implement > gettimeofday() at user-level you need to modify the page. Some of the > information the kernel has to keep for the thread group can be stored in > this place and eventually be used by some uerlevel code executed by > jumping to 0xfffff000 or whatever the address is. You don't actually need to modify the page, rather the data for the user level gettimeofday needs to be in a shared page and some register (like %tr) must expose the current cpu number to index into the data. Either way, it's an internal implementation detail for the kernel to take care of, with multiple potential solutions. -ben -- "Do you seek knowledge in time travel?" - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | |||||||||
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