Articles
Explore structured guides on computer architecture, operating systems, systems programming, Python data science, Rust and quantitative finance.
Chapter 10 · Programming
Build an IR optimiser in C++ with constant folding, branch simplification, unreachable-code removal and dead code elimination while preserving behaviour.
28 min Intermediate
Chapter 9 · Programming
Implement compiler control flow in x86-64 assembly by lowering IR comparisons, conditional branches, if/else statements and while loops.
32 min Intermediate
Chapter 8 · Programming
Add System V AMD64 function calls to a C++ compiler with x86-64 argument registers, stack alignment, return values, a NASM runtime and ELF64 linking.
37 min Intermediate
Chapter 7 · Programming
Build a compiler backend in C++ that translates checked IR into x86-64 NASM assembly with stack frames, arithmetic operations and native Linux executables.
36 min Intermediate
Chapter 6 · Programming
Build an intermediate representation in C++. Lower a checked AST into three-address-style instructions with temporaries, variables, basic blocks, branches, loops and function calls.
38 min Intermediate
Chapter 5 · Programming
Learn semantic analysis in a compiler by building symbol tables, nested scopes and static type checking in C++, with diagnostics and CTest tests.
31 min Intermediate
Chapter 4 · Programming
Build a recursive descent parser in C++ that converts lexer tokens into an AST, handles operator precedence, reports syntax errors, and runs CTest tests.
30 min Intermediate
Chapter 3 · Programming
Build a lexer in C++ that converts source code into tokens, recognises keywords and operators, applies maximum munch, and reports useful errors.
18 min Intermediate
Chapter 2 · Programming
Design a small statically typed C-style programming language from scratch, including its syntax, types and grammar, then build its compiler in C++ with CMake and Docker.
7 min Intermediate
Chapter 1 · Programming
Learn how a compiler transforms source code into machine code through lexing, parsing, semantic analysis, IR, optimisation and x86-64 code generation.
18 min Intermediate
Chapter 13 · Operating Systems
Give PurgatoryOS a prompt. Add uart_getc and a line-discipline buffer, parse commands on top of Post 12's ramdisk, dispatch built-ins (ls, cat, echo, cd, pwd, help, clear), and load /bin/hello as a flat binary at a fixed address. This is the payoff post, where readers finally type into their own kernel.
49 min Intermediate
Chapter 12 · Operating Systems
Build an in-memory tree filesystem for PurgatoryOS in no_std Rust using Box<Node>, BTreeMap<String, NodeId>, and Vec<u8> on top of Post 11's allocator. Add three new syscalls (open, read, close), a per-task file descriptor table, and a working VFS layer that the shell in Post 13 can type against.
35 min Intermediate