dsemul_thread_rollback(9)

💅 dsemul_thread_rollback(9) — Kernel API Manual ✨

okay so bestie, welcome to the <dsemul_thread_rollback> page from the Kernel API Manual. This is the little function that says “we’re done with that delay-slot emulation frame, let’s bounce,” and honestly it’s giving cleanup main-character energy. 🫶

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🌸 NAME 🌸

dsemul_thread_rollback - Rollback from an 'emulation' frame.

✨ SYNOPSIS ✨

bool dsemul_thread_rollback (struct pt_regs *regs );

🎀 ARGUMENTS 🎀

• regs — User thread register context. That’s the register-context handoff, bestie; it’s how this function knows which thread’s vibe we’re checking. 💫

🦋 DESCRIPTION 🦋

Okay so picture this: if the current thread — the one whose register context is represented by regs — is executing within a delay slot 'emulation' frame, then this function exits that frame. Periodt. 💅

The PC gets rolled back to the branch if the instruction that was being 'emulated' has not yet executed. If it has executed, then the PC is advanced to the continuation PC instead. It’s literally a “did the emulated instruction happen yet?” fork in the road, and the function handles both paths. 🛣️✨

🌈 RETURN 🌈

True if a frame was exited, else false. That’s it, no cap. ✅

👑 SEE ALSO 👑

Kernel file ./arch/mips/include/asm/dsemul.h plus these iconic little friends:

• mips_dsemul(9)
• do_dsemulret(9)
• dsemul_thread_cleanup(9)
• dsemul_mm_cleanup(9)

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that’s the whole page, bestie 🍓 — sourced from ./arch/mips/include/asm and dated October 2026, mwah 💋