The CLI header contains all of the runtime-specific data entries and other information. The header should be placed in a read-only, sharable section of the image. This header is defined as follows:
| Offset | Size | Field | Description |
|---|---|---|---|
| 0 | 4 | Cb | Size of the header in bytes |
| 4 | 2 | MajorRuntimeVersion | The minimum version of the runtime required to run this program, currently 2. |
| 6 | 2 | MinorRuntimeVersion | The minor portion of the version, currently 0. |
| 8 | 8 | MetaData | RVA and size of the physical metadata (§II.24). |
| 16 | 4 | Flags | Flags describing this runtime image. (§II.25.3.3.1). |
| 20 | 4 | EntryPointToken | Token for the MethodDef or File of the entry point for the image |
| 24 | 8 | Resources | RVA and size of implementation-specific resources. |
| 32 | 8 | StrongNameSignature | RVA of the hash data for this PE file used by the CLI loader for binding and versioning |
| 40 | 8 | CodeManagerTable | Always 0 (§II.24.1). |
| 48 | 8 | VTableFixups | RVA of an array of locations in the file that contain an array of function pointers (e.g., vtable slots), see below. |
| 56 | 8 | ExportAddressTableJumps | Always 0 (§II.24.1). |
| 64 | 8 | ManagedNativeHeader | Always 0 (§II.24.1). |