Jmp Opcode - X86

To understand the JMP opcode, one must first understand the memory model of the x86 architecture.

Example: FF 2D 34120000 → JMP FAR [0x1234] reads a 48-bit far pointer from memory. x86 jmp opcode

Sometimes, the destination isn't known until the program is actually running (e.g., a switch statement or a function pointer). This is an . Opcode: FF /4 (The /4 refers to the ModR/M byte encoding). Example: JMP EAX or JMP [EBX] . To understand the JMP opcode, one must first

The answer defines the three families of JMP : To understand the JMP opcode

FF /4

IP soon learned that JMP came in different styles, like different types of magic boots: