futex_xchgl
DEFINE_IFUNC(, int, futex_xchgl, (int, uint32_t *, int *))
DEFINE_IFUNC(, int, futex_xchgl, (int, uint32_t *, int *))
ret = futex_xchgl(oparg, uaddr, &oldval);
int futex_xchgl(int oparg, uint32_t *uaddr, int *oldval);