unwinder_register(9)

💅 unwinder_register(9) — like, the kernel API manual bestie 🎀

okay so real talk, this one lives in the Kernel API Manual and it's genuinely iconic — it's the page all about unwinder_register. yes it's short. no that doesn't make it any less of a main character. let's get into it ✨

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🌸 NAME 🌸

unwinder_register — Used to install new stack unwinder

like, that's literally the whole job. you show up, you install a stack unwinder, you leave. slay 💅

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✨ SYNOPSIS ✨

int unwinder_register (struct unwinder *u );

copy it exactly bestie, spaces and all, don't come for me about the spacing, that's how it's written fr fr 🫶

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🎀 ARGUMENTS 🎀

• u — the unwinder to be registered. yes, just one. it's the star of the show. hand it over and let the kernel do its thing 👑

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🔥 DESCRIPTION 🔥

so here's the vibe: unwinder_register installs the new stack unwinder onto the unwinder list, and that list is sorted by rating. so it's not just on the list, it gets slotted in based on its rating. the list is very much a ranked situation. highkey a vibe check for unwinders 😌

and then the returns, because we always read the returns:

• Returns -EBUSY if registration fails 💀
• zero otherwise 🌈

that's it. that's the whole function. no cap.

ngl, if you get -EBUSY back, registration failed — don't go thinking it worked, bestie. zero means you're good 🫶

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🦋 SEE ALSO 🦋

• Kernel file ./arch/sh/kernel/unwinder.c — go read the source, iykyk 📖
• select_unwinder(9) — the friend of the family, say hi to them too 💖

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and that's the page!! 🧚 from ./arch/sh/kernel, dated October 2026, and yeah the page name is unwinder_register(9) again because that's how manpages do — mwah, go register something, periodt 💜🌸