dwarf_read_uleb128(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dwarf_read_uleb128 — ok bestie, let's talk

Heyyy so real quick, we're in the Kernel API Manual today and the star of the show is dwarf_read_uleb128(9). Yes it's a mouthful, yes it's iconic, no you don't have to say it out loud. 🎀

✨ NAME ✨

dwarf_read_uleb128 — read unsigned LEB128 data. That's it, that's the whole vibe. 🦋

🌸 SYNOPSIS 🌸

unsigned long dwarf_read_uleb128 (char *addr , unsigned int *ret );

🫶 ARGUMENTS 🫶

  • addr — the address where the ULEB128 data is stored. Like, the actual spot in memory where the good stuff lives. 📍
  • ret — address to store the result. You hand it a pointer, it fills it in. Giving "you do the homework, I'll take the credit" energy but make it C. 💀

🔥 DESCRIPTION 🔥

Okay so what this thing actually does: it decodes an unsigned LEB128 encoded datum. Little variable-length number, very compact, very demure. 💅

The algorithm is taken from Appendix C of the DWARF 3 spec — not my rules, that's just where it comes from. And if you're curious about the encodings themselves, the spec says go look at the section called "7.6 - Variable Length Data". iykyk. 📚

Then it returns the number of bytes read. So you always know exactly how far you traveled through memory. Slay. ✨

👑 SEE ALSO 👑

Literally the whole squad, all from the kernel file ./arch/sh/kernel/dwarf.c:

Go say hi to all of them, they're all main characters in their own way. 🫶

Not me getting emotional over a variable-length integer decoder 😭 anyway go read the spec, it's giving required reading.

That's the whole page bestie! Sourced straight from ./arch/sh/kernel, dated October 2026, and yes the title is still dwarf_read_uleb128(9) in case you forgot already 💖 mwah, go decode something. 🌈

📦 where this page comes from