On Mon Nov 21 10:34:15 EST 2011, [email protected] wrote: > registers are dead on entry to a function, so there's no point in saving > particular values, because they won't be used. on an amd64, however, > the kernel should > reset the FP-used flag, to cause the preset values to be set in the high FP > registers if the fork'd process does touch the FP. >
why does pc/trap.c:/^syscall take pains to save the fp registers, then? - erik
