Generally sbrk [1] is used to extend heap memory. The heap is then modified directly using clever pointer arithmetic. Source: I did this lab a month ago at CM

Generally sbrk [1] is used to extend heap memory. The heap is then modified directly using clever pointer arithmetic. Source: I did this lab a month ago at CMU :) [1] https://linux.die.net/man/2/sbrk https://linux.die.net/man/2/sbrk