Introduction to x64 ASM

Sat, 21 Sep 2024 00:00:00 +0000

1. Introduction to Assembly and x64 Architecture

What is Assembly Language?

Every program you’ve ever run, whether it’s a shell script, a Python interpreter, or a AAA game engine, eventually gets reduced to a stream of raw binary instructions that a CPU can execute directly. Assembly language is the thin, human-readable layer sitting right on top of that binary stream. Each assembly instruction maps almost one-to-one to a single machine instruction, so when you write mov rax, rbx, you’re really just writing a mnemonic for a specific sequence of bits that tells the processor “copy the contents of one register into another.” There’s no compiler doing clever things behind your back, no garbage collector, no runtime. What you write is (almost) exactly what runs.

Advanced C Programming Best Practices

Mon, 29 Jul 2024 00:00:00 +0000

C gives you almost nothing for free. There’s no garbage collector cleaning up after you, no runtime checking your array bounds, no exception handler catching your mistakes before they corrupt memory. That’s exactly why C is still the language of choice for operating systems, embedded firmware, and anything that needs to talk directly to hardware, and it’s also exactly why C code has such a long, embarrassing history of security vulnerabilities. The language trusts you completely. Most of “best practices in C” really boils down to one idea: build habits and guardrails that compensate for the safety net the language refuses to provide.

C on Prepakis Georgios | Kernelstub | Security Researcher

Introduction to x64 ASM

1. Introduction to Assembly and x64 Architecture

What is Assembly Language?

Advanced C Programming Best Practices