Assembly Language: Understanding Low-Level Programming, Slides of Computer science

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Assembly Language

Presented by: Abigail Atiwag

Assembly language is a low-level programming language that is closely related to the architecture of a computer's central processing unit (CPU). Here are some key topics related to assembly language programming:

Machine Code Machine code consists of binary instructions that directly control the hardware of a computer. Each instruction corresponds to a specific operation such as arithmetic calculations, memory access, or control flow.

Assembly Language Assembly language is a human-readable representation of machine code using mnemonics and symbolic labels. It allows programmers to write code that is easier to understand and maintain than raw binary instructions.

ISA Basics ISA defines the set of instructions that a CPU can execute, including arithmetic/logical operations, data movement, branching, and control instructions.

Instruction Format Instructions in assembly language typically have an opcode (operation code) and operands (data or addresses). The format of instructions varies based on the CPU architecture (e.g., x86, ARM, MIPS).

Assembly Language Syntax

Mnemonics Mnemonics are symbolic representations of instructions (e.g., MOV for move, ADD for add, JMP for jump).

Directives Assembly language directives provide instructions to the assembler for tasks such as defining data, allocating memory, including external files, and setting program attributes.

Basic Assembly Programming Concepts

Memory Access Assembly instructions allow reading from and writing to memory locations, including stack operations, heap allocation, and data manipulation.

Control Flow Control flow instructions include conditional branches (e.g., JZ for jump if zero), unconditional jumps (e.g., JMP for jump), loops (e.g., LOOP for loop iteration), and subroutine calls (e.g., CALL for function call).

Assembler The assembler translates assembly language code into machine code, generating an executable program or object files.

Linker The linker combines object files, resolves external references, and generates the final executable file by linking libraries and dependencies.