dmultu_func(9)

📦 version 7.3.1, in nixpkgs unstable

✨ dmultu_func(9) ✨

okay so bestie, welcome to the dmultu_func page from the Kernel API Manual — yes that's the manual name, we're folding it in right here at the top so it doesn't get lost 💖 this whole thing is about emulating a DMULTU instruction and it's lowkey iconic.

🌸 NAME 🌸

dmultu_func — literally emulates a DMULTU instruction. that's it. that's the whole vibe. 🎀

🦋 SYNOPSIS 🦋

int dmultu_func (struct pt_regs *regs , u32 ir );

look at her. so simple. so clean. we stan a compact signature ✨

💅 ARGUMENTS 💅

  • regs — the process register set. the whole little reg buffet for this process 🫶
  • ir — the instruction. the actual ir in question, no cap 🔥

👑 DESCRIPTION 👑

so like, what does she do? she emulates a DMULTU instruction, periodt. 💜

Returns 0 on success or SIGILL for 32-bit kernels. that's the whole story, bestie — and yes, SIGILL is the dramatic one 💀 so if you're on a 32-bit kernel, that's your outcome, no cap.

🌈 SEE ALSO 🌈

bestie we're going on a journey — the kernel file ./arch/mips/kernel/mips-r2-to-r6-emul.c plus the whole friend group:

iykyk 💫

reminder bestie: every one of those references is the real deal, go read them if you're curious — group chat is always open 🧚

sign-off time 🎀 this little beauty lives in ./arch/mips/kernel, dated October 2026, and she's serving dmultu_func(9) energy from the top of the page to the bottom. mwah 💋 go emulate something, queen 👑

📦 where this page comes from