Endereçamento no Windows 8

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How Control Flow Guard Drastically Caused Windows 8.1 Address Space and Behavior Changes

Windows 8.1 radically changes the address space layout of the system by finally removing the 44-bit limitation which I described in one of the earliest blog posts on this website (and which Wikipedia even links to!). This is a little-known detail about the operating system, and an odd thing for Microsoft not to emphasize on with more aplomb, especially given that 8.1 is considered a “patch” of Windows 8.

Now, you may think that 16 TB to 256 TB is a meaningless change since no applications currently use even a fraction of that space, but the main benefit of this change are not the ability to allocate additional memory, but rather the increased entropy space available for Address Space Load Randomization (ASLR), especially given that Windows 8 introduced High Entropy ASLR (HEASLR), Top-down Randomization and Anonymous Memory Randomization.

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