> I'm having a senior moment here, but wasn't it common to include space in instruction-space and initialized data space, designed to permit binary patching by

> I'm having a senior moment here, but wasn't it common to include space in instruction-space and initialized data space, designed to permit binary patching by jump table to (currently) un-used pre-assigned regions Maybe you're thinking about hot patch points in Windows DLLs? https://blogs.msdn.microsoft.com/oldnewthing/20110921-00/?p=9583 https://blogs.msdn.microsoft.com/oldnewthing/20110921-00/?p=...