This is one reason why OS X enforces a hard page-zero on 64-bit programs - it is... | Hacker News

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		daniel02216 on July 12, 2015 \| parent \| context \| favorite \| on: Why is my x64 process getting heap address above 4... This is one reason why OS X enforces a hard page-zero on 64-bit programs - it is a hard error to map or allocate anything in the lowest 4 GB of memory, so programmers will immediately discover pointer truncation bugs when porting 32-bit code to 64-bit.

cokernel_hacker on July 12, 2015 [–]

What if you have a load command in your mach-o which asks for an address below the 32-bit boundary? Will loading the image fail?

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