FUNCTION::USER_ULONG_ERROR(3stap)

💖 FUNCTION::USER_ULONG_ERROR 💖

ok so bestie, we're in the String and data retrieving functions chapter of the SystemTap Tapset Reference, section 3stap, and today's main character is function::user_ulong_error. she's giving "i fetch numbers from userspace and i will absolutely tell you when i can't." periodt. 💅

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✨ NAME ✨

function::user_ulong_error — retrieves a unsigned long value stored in user space 🫶

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🌸 SYNOPSIS 🌸

user_ulong_error:long(addr:long)

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🎀 ARGUMENTS 🎀

• addr — the user space address you wanna pull that unsigned long out of, no cap. 📍

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🦋 DESCRIPTION 🦋

She returns the unsigned long value sitting at a given user space address. simple. iconic.

but bestie, listen — if that user space data is not accessible, an error will occur. like, she will not pretend. no fake numbers, no vibe-based guessing. 😭

💀 also important: the size of the unsigned long depends on the architecture of the current user space task — and that matters specifically for those architectures that support both 64/32 bit compat tasks. so yeah, it's giving "it depends," but like, architecturally. iykyk. ✨

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👑 SEE ALSO 👑

• tapset::uconversions(3stap)

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that's the whole page, bestie, you ate it up fr fr 🌈⭐

SystemTap Tapset Reference, Ver, September 2026 — mwah, go forth and probe responsibly 💖🧚🎀