Return Example demo -retys 0x000: irmovl Stack, esp Intialize stack pointer 0x006 nop Avoid hazard on esp 0x007: nop 0x008: nop 0x009 callp Procedure call 0x00e irmovl $5, esi Return point 0x014: ha1七 0x020:.pos0x20 Ox020: p:nop #pr。 cedure 0x021: nop 0x022: nop 0x023: re七 0x024: irmoⅴ1$1,号eax i Should not be executed 0x02a: irmovl $2, ecx Should not be executed 0x030: irmovl $3, edx Should not be executed 0x036: 1 Mov1$4,号ebx i Should not be executed 0x100:.pos0x100 0x100: Stack Stack: Stack pointer a Require lots of nops to avoid data hazards Processor– 6 – Processor 0x000: irmovl Stack,%esp # Intialize stack pointer 0x006: nop # Avoid hazard on %esp 0x007: nop 0x008: nop 0x009: call p # Procedure call 0x00e: irmovl $5,%esi # Return point 0x014: halt 0x020: .pos 0x20 0x020: p: nop # procedure 0x021: nop 0x022: nop 0x023: ret 0x024: irmovl $1,%eax # Should not be executed 0x02a: irmovl $2,%ecx # Should not be executed 0x030: irmovl $3,%edx # Should not be executed 0x036: irmovl $4,%ebx # Should not be executed 0x100: .pos 0x100 0x100: Stack: # Stack: Stack pointer Return Example ◼ Require lots of nops to avoid data hazards demo-ret.ys