Lexicon Entry
Assembly Language
Low-level programming at the instruction level. Assembly provides a symbolic representation of the machine code instructions used to control a specific CPU architecture.
Related Knowledge & Cross-References
Build a Debugger from Scratch: Ultimate 3 OS Guide (Part 8)
Understanding the bridge between your code and the kernel is the final key to demystifying how software works. Up to this point in my Assembly Series, you've mastered how to load a process, how calling conventions manage functions, how memory is laid out, and finally, how to talk directly to the hardware via system calls.
System Calls Demystified: 4 Essential Facts About the User-Kernel Bridge
How does your program actually *do* anything? We dive deep into the `syscall` instruction, kernel mode transitions, and the differences between Linux, macOS, and Windows system calls.
Stack Frames & Function Prologues Demystified: x86-64 & ARM64 Guide
Master stack frame prologue and epilogue patterns across x86-64 and ARM64 architectures. Learn how function calls work at the assembly level on Linux, macOS, and Windows.