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Inside the Stack Frame: What Rust Functions Really Compile To: Revision history

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21 November 2025

  • curprev 09:5609:56, 21 November 2025 PC talk contribs 10,243 bytes 0 No edit summary undo
  • curprev 09:5609:56, 21 November 2025 PC talk contribs 10,243 bytes +10,243 Created page with "800px The Illusion of Simplicity Every Rust developer remembers their first fn. It feels clean, mathematical, safe — like this: fn add(a: i32, b: i32) -> i32 { a + b } But what actually happens when you call add(5, 10)? If you think “it just adds two numbers,” you’re only seeing the surface. Beneath that line of code, the compiler orchestrates a micro-architecture:
stack frames, registers, prologues, epilogues, ABI..."
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