> a. the int $0x80 instruction is much slower than syscall. An actual > i386 process can use the syscall instruction which is disambiguated > by the CPU based on mode, but an x32 process is in the same CPU mode > as a normal 64-bit process.
So set a flag, whoopee > b. 64-bit arguments have to be split between two registers for the > i386 entry points, requiring user-space stubs. Diddums. Given you've yet to explain why everyone desperately needs this extra interface why do we care ? > All in all, the cost of an extra system call table is quite modest. And the cost of not doing it is a gloriously wonderful zero. Yo've still not explained the justification or what large number of apps are going to use it. It's a simple question - why do we care, why do we want the overhead and the hassle, what do users get in return ? Alan
