kern_return_t
IOMemoryDescriptorMapMemEntry(vm_map_t map, ipc_port_t entry, IOOptionBits options, bool pageable,
mach_vm_size_t offset, mach_vm_address_t * address, mach_vm_size_t length);
kern_return_t
IOMemoryDescriptorMapMemEntry(vm_map_t map, ipc_port_t entry, IOOptionBits options, bool pageable,
mach_vm_size_t offset, mach_vm_address_t * address, mach_vm_size_t length);