do_dsemulret(9)

📦 version 7.3.1, in nixpkgs unstable

💅 do_dsemulret(9) 💅

okay bestie, welcome to the Kernel API Manual page for do_dsemulret. this one is lowkey iconic: it's the return path for a delay slot 'emulation' frame, and it's giving “you called mips_dsemul, now let's get you back home” energy. 🦋✨

✨ NAME ✨

do_dsemulret — Return from a delay slot 'emulation' frame. 🌸

🎀 SYNOPSIS 🎀

bool do_dsemulret (struct pt_regs *xcp );

🧚 ARGUMENTS 🧚

  • xcp — User thread register context. literally the user thread's regs, bestie. 💖

🔥 DESCRIPTION 🔥

bestie, you call this in response to the BRK_MEMU break instruction. that instruction is the one used to return to the kernel from branch delay slot 'emulation' frames following a call to mips_dsemul. ✨

and the glow-up? do_dsemulret restores the user thread PC to the value that was passed as the cpc parameter to mips_dsemul. 🎀 periodt.

👑 RETURN 👑

True if an emulation frame was returned from, else false. that's the whole vibe check. 💅

🌈 SEE ALSO 🌈

kernel file ./arch/mips/include/asm/dsemul.h, plus the squad:

mwah 💋 signed off from ./arch/mips/include/asm, dated October 2026. k bye bestie, go restore that PC 🫶👑

📦 where this page comes from