> the system may then decide This makes me think if the whole question is really about C++ or the OS implementation for memory allocations. This could have lit

> the system may then decide This makes me think if the whole question is really about C++ or the OS implementation for memory allocations. This could have little to do with C++. On a bare-metal system, malloc/sbrk (and thus new) can be something as simple as: uint32_t retptr = heap; heap += size; return retptr;