fn allocate_mmap_buffer() -> Result<Vec<u8>, Status>Expand description
Allocate a buffer to hold a copy of the memory map returned from ExitBootServices.
This seems to be the opposite of an exact science:
- After boot services were exited, allocation is impossible.
- The number of descriptors changes over time.
As a result, we now overallocate to hopefully have enough headroom to contain the memory map after exiting.