Wade GasiorASLR Minix

1. Stack Randomization

STACK

DATA

TEXT

GAPApproach: Randomize GAP size

BP

Edits to exec.c

/usr/src/servers/pm/exec.c

2. Heap Randomization

STACK

DATA

TEXT

GAP

BP

RANDOM SPACE

Approach: malloc random space(prior to first malloc)

/usr/src/lib/ansi/malloc.c

3. Test: print-adds.c

Test Results