When the program enters a function, a saved instruction pointer (ip/rip/eip) is the return address, which is the address where the function should jump back after termination. From what is said in the book, each memory address has one byte, and each byte has a memory address.

EIP is a register in x86 architectures (32bit). It holds the "Extended Instruction Pointer" for the stack. In other words, it tells the computer where to go next to execute the next command and controls the flow of a program. Research Assembly language to get a better understanding of how registers work. Skull Security has a good primer.

2019年6月18日 · eip寄存器，用来存储cpu要读取指令的地址，cpu通过eip寄存器读取即将要执行的指令。 每次CPU执行完相应的汇编指令之后， EIP 寄存器 的值就会增加。 一、因为80386 CPU的寻址范围是4GB，所以它的寻址模式是平坦模式的。

For example, if we say eip is pointing to 0xDEADBEEF, this means that the eip register is storing the value 0xDEADBEEF, which can be interpreted as an address to refer to a location in memory. There are 6 other general-purpose x86 registers that we might come accross during this class: eax , ebx , ecx , edx , esi and edi .

2019年12月1日 · Finding EIP: 32-bit Assembly Methods. I will begin with the methods I found to locate EIP using x86 Assembly (32-bit) instructions. There are two methods and they both can be useful depending on the situation and restrictions that you may be facing. Both methods will accomplish the same goal of finding EIP. The first method that I will detail ...

EIP instruction pointer EIP is a 32bit value indicating the location in memory where the current instruction starts (i.e., memory address of the instruction) EIP cannot be changed directly Normally, it increments to point to the next instruction in memory But it can be updated implicitly by provided control flow instructions

2021年4月14日 · Registers are stored in registers, not in the process's own memory. Debuggers use a special interface provided by the OS to change registers of a running process, including EIP. In Linux, it's the ptrace(2) API.

2024年1月1日 · In x86 assembly language, addressing modes determine how memory operands are specified in instructions. Addressing modes allow the programmer to access data from memory or perform operations on operands effectively. The x86 architecture supports various addressing modes, each offering different ways to reference memory or registers.

2016年10月30日 · EIP is the instruction pointer. It points to (holds the address of) the first byte of the next instruction to be executed. ESP is the stack pointer. It points to (holds the address of) the most-recently pushed value on the stack. These are common architectural registers. This code is simply demonstrating how a function call / return sequence works.

The instruction pointer register (EIP) contains the offset address, relative to the start of the current code segment, of the next sequential instruction to be executed. The instruction pointer is not directly visible to the programmer; it is controlled implicitly by control-transfer instructions, interrupts, and exceptions.