17. JMP Instruction Example

• Let's assume that register EAX stores a memory offset.

• The memory offset is a 32-bit absolute value, which can be added or subtracted from the current address of program execution found in the instruction pointer EIP.

• Consider x86 JMP instruction:

      jmp eax
  

• The JMP transfers control to the new address by modifying the program counter:

  • EIP_new = EIP_current + EAX.

• The result of this operation is unconditional jump to a new address in the program.

• Opcode of this x86 instruction is 0FFh.