Wel come
THE BASIC OF THE X86 ARCHITECTURE To explore the details of the buffer overflow exploits you must have a good deal of assembly and the underlying computer architecture mainly the microprocessor. This knowledge will be used in reading the values in registers and describing what the code will do or is doing as a result of these values.
Computer
You should be proficient in understanding how various runtime data structures and the stack work, how registers work (and what their purpose is), and how to read and understand assembly. The following sections provide a brief overview of these related concepts and knowledge and should serve well in getting to understand the buffer overflow exploit clearly. Most of the reference will be based on Intel 32 bit processor of Linux OS. THE MICROPROCESSOR PROCESSOR REGISTERS (INTEL) We’ll begin with a short review of how the basic program execution registers of the 80386 processor operates. The Intel processor contains small amounts of internal memory, known as registers. This paper will only discuss the basic program execution registers that consist of: 8 general-purpose registers – 32 bits. 6 segment registers – 16 bits. 1 EFLAGS register – 32 bits. 1 EIP, Instruction Pointer register – 32 bits.
