Incorrect Return Example ret 0x023 ret FDEMW 0x024 irmovl $1,,, eax Oops! FDEM V 0x02 FDEMV 0x030: i工mov1$3,号edx#Oops FDEM 0x00e irmovl $5, esi Return FDEM W a Incorrectly execute 3 instructions following ret W vaIM= 0x0e valE =1 dstE=号 valE dstE=告e D dstE= edx va|C←5 rB←各 Processe– 7 – Processor Incorrect Return Example 0x023: ret F D E M 0x024: irmovl $1,%eax # Oops! F D E M W W 0x02a: irmovl $2,%ecx # Oops! F D E M W 0x030: irmovl $3,%edx # Oops! F D E M W 0x00e: irmovl $5,%esi # Return F D E M W # demo-ret F D E M W E valE  2 dstE = %ecx M valE = 1 dstE = %eax D valC = 3 dstE = %edx F valC  5 rB  %esi W valM = 0x0e 0x023: ret F D E M 0x024: irmovl $1,%eax # Oops! F D E M W W 0x02a: irmovl $2,%ecx # Oops! F D E M W 0x030: irmovl $3,%edx # Oops! F D E M W 0x00e: irmovl $5,%esi # Return F D E M W # demo-ret F D E M W E valE  2 dstE = %ecx E valE  2 dstE = %ecx M valE = 1 dstE = %eax M valE = 1 dstE = %eax D valC = 3 dstE = %edx D valC = 3 dstE = %edx F valC  5 rB  %esi F valC  5 rB  %esi W valM = 0x0e ◼ Incorrectly execute 3 instructions following ret