_UC_MACHINE_SP
#ifndef _UC_MACHINE_SP
#define _UC_MACHINE32_SP(uc) _UC_MACHINE_SP(uc)
#define _UC_MACHINE_FP(uc) (((__greg_t *)_UC_MACHINE_SP(uc))[15])
#define _UC_MACHINE_FP(uc) (((__greg_t *)_UC_MACHINE_SP(uc))[15])
void *sp = (void *)(uintptr_t)_UC_MACHINE_SP(uc);
printf("_UC_MACHINE_SP(u)=%" PRIxREGISTER "\n", (register_t)_UC_MACHINE_SP(&u));