process-specific data structures (page tables, task and mm structs) same physical memory for each proces kernel code/data/stack kernel OXcO Pesp stack demand-zero process VM Memory mapped region data for shared libraries text libc. so brk runtime heap(via malloc) demand-zero uninitialized data( bss) initialized data .data) data 匚 program text(tex text forbiddenkernel code/data/stack Memory mapped region for shared libraries runtime heap (via malloc) program text (.text) initialized data (.data) uninitialized data (.bss) stack forbidden 0 %esp process VM brk 0xc0 same physical memory for each process process-specific data structures (page tables, task and mm structs) kernel VM .data .text p demand-zero demand-zero libc.so .data .text