FUNCTION::USER_INT64(3stap)

✨ FUNCTION::USER_INT64 ✨

okay bestie, gather round 🫶 this is a page from the SystemTap Tapset Reference, section 3stap — aka the part of the manual where the tapset functions live. and babes, this one is so useful it's giving main character energy 💅

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🌸 NAME 🌸

function::user_int64 — retrieves a 64-bit integer value stored in user space 🎀

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🦋 SYNOPSIS 🦋

user_int64:long(addr:long)

like. that's it. that's the whole vibe. one arg, one return. no cap ✨

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💖 ARGUMENTS 💖

• addr — the user space address you wanna pull that 64-bit integer out of 🍓 (yes, the address, the actual spot in user memory, hand it over)

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👑 DESCRIPTION 👑

okay so here's the tea ☕ — user_int64 returns the 64-bit integer value from a given user space address. that's the whole job. she's focused, she's employed, she ate 🔥

and here's the actually important part, bestie, so listen up: it returns zero when user space data is not accessible. not an error, not a crash, not a dramatic exit — just a cute little 0. so if you get a zero back, don't immediately assume the value was literally zero, because it might just be the "couldn't reach that memory" zero. iykyk 😭 always worth keeping in mind.

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🌈 SEE ALSO 🌈

• tapset::uconversions(3stap) 💜

go read that one too, she's the whole friend group of conversions, this function is just one of the girlies 🧚

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quick vibe check: the addr has to be a user space address, and if that memory isn't accessible you get 0 back — that's the documented behaviour, that's the deal, periodt.

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and that's the page!! mwah 💖 this was the SystemTap Tapset Reference, version dated September 2026 — go forth and read your user memory, you absolute icon 👑✨