---
title: CreateSubMemoryDescriptor
framework: Kernel
role: symbol
role_heading: Type Method
platforms: [driverkit 20.0+, macOS 11.0+]
path: kernel/iomemorydescriptor/3674611-createsubmemorydescriptor
---

# CreateSubMemoryDescriptor

## Declaration

```occ
static kern_return_t CreateSubMemoryDescriptor(uint64_t memoryDescriptorCreateOptions, uint64_t offset, uint64_t length, IOMemoryDescriptor *ofDescriptor, IOMemoryDescriptor **memory);
```