Fix crash on linux aarch64#227

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SegHaxx wants to merge 4 commits intocebix:masterfrom

SegHaxx:linux-64bit-mmap

Commits on Nov 26, 2020

Fix low memory allocation on aarch64 linux.
SegHaxx
committed

Commits on Nov 27, 2020

Commits on Dec 1, 2020

Banked addressing mode does not require 32bit addresses.
SegHaxx
committed