Kernel Support

exec_elf.c taught to recognize pie programs
DYNAMIC + INTERP section == pie program

new uvm function to return random load address
vaddr_t uvm_map_pie(vaddr_t align);
VM_PIE_MAX_ADDR, VM_PIE_MIN_ADDR, VM_PIE_MIN_ALIGN
arc4random_uniform(3)

 AUXV data adjusted to account for loading at random address

What memory range to use for PIE?