Messages in this thread | | | Date | Thu, 19 Dec 2002 11:10:54 -0500 | From | billyrose@billyros ... | Subject | Re: Intel P6 vs P7 system call performance |
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Richard B. Johnson wrote:
> Because the number pushed onto the stack is a displacement, not > an address, i.e., -4095. To have the address act as an address, > you need to load a full-pointer, i.e. SEG:OFFSET (like the old > 16-bit days). The offset is 32-bits and the segment is whatever > the kernel has set up for __USER_CS (0x23). All the 'near' calls > are calls to a signed displacement, same for jumps.
call's and jmp's use displacement, ret's are _always_ absolute. - 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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