set_orig_insn(9)

🌸 NAME 🌸

hiii bestie 💖 this is set_orig_insn from the Kernel API Manual — section 9, main character energy, no cap. Its whole job is Restore the original instruction. That's it. That's the slay. ✨

🦋 SYNOPSIS 🦋

int set_orig_insn (struct arch_uprobe *auprobe , struct vm_area_struct
*vma , unsigned long vaddr );

🎀 ARGUMENTS 🎀

• auprobe — the arch specific probepoint information. yes, architecture-specific, iykyk 🧚
• vma — the probed virtual memory area. the vma in question, bestie 🦋
• vaddr — the virtual address to insert the opcode. that's where the opcode goes 💅

🔥 DESCRIPTION 🔥

So for mm mm, restore the original opcode (opcode) at vaddr. (Yes, the page says mm mm — we are keeping every detail, periodt.) Return 0 (success) or a negative errno. That's the vibe check: success is 0, bad news is a negative errno. 😭

👑 SEE ALSO 👑

Kernel file ./kernel/events/uprobes.c and its besties:

• is_swbp_insn(9)
• is_trap_insn(9)
• set_swbp(9)
• uprobe_unregister_nosync(9)
• uprobe_register(9)
• uprobe_apply(9)
• uprobe_get_swbp_addr(9)

okay that's the whole lore, bestie 🫶 signed off from ./kernel/events, dated October 2026, and still living in set_orig_insn(9) land. 💖✨