X86 Assembly Programming

Explore IA32 integer registers, their 32-bit general purpose roles, and how 16-bit subregisters provide backwards compatibility, with flexible naming beyond traditional register aliases.

explains x86 condition codes as single-bit flags like carry, zero, and overflow and how implicit or explicit flag setting governs conditional set instructions that yield 0 or 1.

The lecture demonstrates an x86 assembly jump example, loading X, comparing with zero, and updating X: increment when not zero, or set X to one when zero.

Learn how the mov instruction transfers data by specifying a source and a destination, using immediate data, registers, or memory addresses stored in a register.

Compute an address using the source-destination instruction. Show how the source, the address mode expression, determines the destination address, and sets the destination to the expression's address.

Explore gdb use cases in x86 assembly by tracing register moves and arithmetic. Disassemble print calls and examine swaps via pointers and test harnesses.

Explore x86 assembly arithmetic and instructions, including add, increment, decrement, and negate, operating on a source and destination. Understand left and right shifts, and or, not operations between registers.

Explore the IA32 Linux memory layout, with a stack growing to eight megabytes, a heap for dynamic storage, and data and text sections containing statically allocated data and instructions.

Explain the procedure return in x86 assembly by popping the return address from the stack and jumping to that address.

Save register contents to the stack to preserve values across calls; two conventions exist, the first called a save where the caller saves temporary values in its frame.

Explore the SSE registers, eight 128-bit registers accessible only in 64-bit mode, which remain disabled by default until the operating system explicitly enables them.

Explore sse instructions for packed double-precision values, moving and adding multiple numbers in registers, using a mask to process two, four, or eight elements with divide, multiply, subtract.