Readreview the following in the current folder A Crash Cours

Read/review the following in the current folder: A Crash Course in x86 Disassembly Data Transfers, Addressing, and Arithmetic Then complete the following exercises: Explain what each of the following does: mov eax, ebx mov eax, 0x42 mov eax, [0x4037C4] mov eax. [ebx] mov eax, [ebx+esi*4] Assume that registers EAX and EBX contains the values in Figure 1 and memory values at the given addresses are as shown. Explain what the command mov eax, [ebx+C] does. Explain what the command lea eax, [ebx+C] does. Assume registers EAX and EBX are as they are in 2 and EDX and ECX are 0x00A30040 and 0x00000001. State which register each respective result gets stored and the value. sub eax, 0x10 add eax, ebx inc edx

Solution

1. The mov instruction will copies the value from second operand into the location referred by its first operand.
(a) mov eax, ebx
Ans: It will copy the value of ebx into eax.

(b) mov eax, 0x42
Ans: It will copy the value 0x42 into eax.

(c) mov eax, [0x4037C4]
Ans: It will copies the 4 bytes at the memory location 0x4037C4 into eax register.

(d) mov eax, [ebx]
Ans: It will move 4 bytes in memory at the address contained in ebx into eax.

(e) mov eax, [ebx+esi*4]
Ans: It will move 4 bytes of data at address ebx+esi*4 into eax.