[PATCH 0/1] MR2943: loader: In macOS preloader, reserve top-down heap space for Wow64.

[Tim Clem (＠tclem)]

This region is currently only reserved for 32-bit processes, which puts Wow64 at a disadvantage. The larger address space means it's not often an issue, but it's better to be explicit. Adding the reservation also causes ntdll/unix/virtual.c to consider that region first when making Wow64 allocations, before continuing through to the lower reservations. (And that's important for, e.g., changes like MR !2879.)