Constant SYS_MEM_REGION_EXPORT 

pub const SYS_MEM_REGION_EXPORT: usize = 105; // 105usize

Export a memory region as a shareable handle.

• addr: start address of the region
• len: length in bytes

Returns a capability handle that can be granted to another process. The other process can then map it with SYS_MEM_REGION_MAP.