mips_dsemul(9)

📦 version 7.3.1, in nixpkgs unstable

🎀 NAME 🎀

okay bestie, welcome to mips_dsemul(9) from the Kernel API Manual — the page for 'Emulate' an instruction from a branch delay slot. it's giving tiny kernel helper with main character energy, and honestly? obsessed. 💅✨

✨ SYNOPSIS ✨

int mips_dsemul (struct pt_regs *regs , mips_instruction ir , unsigned
       long branch_pc , unsigned long cont_pc );

🌸 ARGUMENTS 🌸

  • regs — User thread register context. like, the register context for the user thread, periodt.
  • ir — The instruction to be 'emulated'. yes, that exact one.
  • branch_pc — The PC of the branch instruction. the branch's PC, iykyk.
  • cont_pc — The PC to continue at following 'emulation'. where you continue after the emulation, fr fr.

💖 DESCRIPTION 💖

okay so here's the tea: mips_dsemul() will emulate or execute an arbitrary MIPS instruction within the context of the current user thread. that's literally the whole assignment. 🦋

it's used primarily to handle instructions in the delay slots of emulated branch instructions — for example, FP branch instructions on systems without an FPU. no cap, that's the vibe. 🎀

🔥 RETURN 🔥

  • Zero on success 😌
  • negative if ir is a NOP 💀
  • signal number on failure 🙈

🌈 SEE ALSO 🌈

check the kernel file ./arch/mips/include/asm/dsemul.h and these besties:

xoxo 💖 this page's source/version is ./arch/mips/include/asm, dated October 2026, and it's from the Kernel API Manual — mips_dsemul(9) out. 🎀✨

📦 where this page comes from