Registers

Question 1

What is EIP?

Answer 1

Instruction Pointer

Holds the memory address of the next instruction to be executed by the CPU. Maintains correct sequence of instructions.

Question 2

What is EAX?

Answer 2

Accumulator

Used for arithmetic, and logical operations. Stores function return return values, passing arguments to system calls, and manipulating CPU features.

Question 3

What is EBX?

Answer 3

Data Index

Stores variables, accesses arrays, and passes function arguments. Versatile storage location for data and memory addresses.

Question 4

What is ECX?

Answer 4

Loop Counter

Utilised for loop control and counting operations. Iterates through data structures and controls repetitive tasks.

Question 5

What is EDX?

Answer 5

Data Register

Used for input/output operations, storing data offsets, holds high-order bits for multiplication/division

Question 6

What is ESP?

Answer 6

Stack Pointer

Keeps track of the top of the stack. Manages function calls, local variables, and other stack-related operations.

Question 7

What is EBP?

Answer 7

Base Pointer

Facilitates efficient stack frame navigation during program execution. Establishes a fixed reference point within the stack frame of a function.

Question 8

What is ESI?

Answer 8

Source Index

During data transfer operations the source data is held here. Used for string manipulation, data copying and memory operations.

Question 9

What is EDI?

Answer 9

Destination Index

Serves as a destination for data during transfer operations. The relationship between ESI and EDI allows efficient movement of data between memory locations.