Assembly (AT&T Syntax) Question 1.A: Consider the following assembly code fragme

Question

Assembly (AT&T Syntax) Question 1.A:

Consider the following assembly code fragment:

___________________________________________________________
pushl %ebp
movl %esp, %ebp
subl $0x40, %esp
movl %ebx, 0x14(%esp)
movl $1, %ebx

___________________________________________________________

Which one of the choices is able to undo the effects of the fragment above?
A. movl 0x14(%esp), %ebx
movl %ebp, %esp
popl %ebp

B. movl -0x26(%ebp), %ebx
addl $0x40, %esp
movl %ebp, %esp
popl %ebp

C. popl %ebp
movl %ebp, %esp
addl $0x40, %esp
movl 0x14(%esp), %ebx

D. movl 14(%esp), %ebx
addl $40, %esp
movl %ebp, %esp
popl %ebp

Explanation / Answer

Code :

pushl %ebp
movl %esp, %ebp
subl $0x40, %esp
movl %ebx, 0x14(%esp)
movl $1, %ebx

Undo the effects of the fragment :

movl 14(%esp), %ebx
addl $40, %esp
movl %ebp, %esp
popl %ebp

Option D is correct choice.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.