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This article mainly introduces which register is used to store the offset address in the code segment in the computer. it is introduced in great detail and has a certain reference value. Interested friends must finish reading it!

The register that holds the offset address in the code snippet is the instruction pointer register. The instruction pointer register IP is used to control the execution order of instructions in the program; during normal operation, IP contains the offset address of the next instruction (byte) to be taken by BIU. In general, IP automatically adds 1 every time the instruction code is accessed from memory, so as to ensure the sequential execution of instructions.

The register that holds the offset address in the code snippet is the instruction pointer register.

The instruction pointer register IP (X86 CPU) is equivalent to the program counter PC in arm CPU, which is used to control the execution order of instructions in the program. In normal operation, IP contains the offset address of the next instruction (byte) to be taken by BIU. In general, every time the instruction code is accessed from memory, IP will automatically add 1 to ensure the sequential execution of instructions. IP is actually the address pointer of the instruction machine code to store the memory unit, and the content of IP can be forced to be rewritten by transfer instructions (such as JMP) to change the order in which the program is executed.

Be careful! The program we write cannot directly access IP, that is, we cannot use instructions to fetch the value of IP or set a value for IP (for example, we cannot assign a value to IP with the mov instruction).

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