vm_get_register_set
if (vm_get_register_set(vcpu, nitems(regset), regset, regs) == -1)
if (vm_get_register_set(vcpus[cur_vcpu], nitems(gdb_regset),
ret = vm_get_register_set(vmm->vmm_vcpu[vcpuid], nregs, vm_regnums,
int vm_get_register_set(struct vcpu *vcpu, unsigned int count,