identify_insn(9)

💅 NAME

identify_insn — bestie, this one identifies a UMIP-protected instruction for you 👑

✨ SYNOPSIS

int identify_insn (struct insn *insn );

🎀 ARGUMENTS

• insn — the instruction structure, and oml it needs to bring its opcode and its ModRM byte, no cap 🫶

🌸 DESCRIPTION

Okay so here's the tea ☕ — this function looks at the opcode and at ModRM.reg inside insn, and it tells you if there's a UMIP-protected instruction in there that can actually be emulated. Literally the whole vibe check is "is this emulatable or not" 🔥

On success, you get back a constant identifying that specific UMIP-protected instruction that can be emulated. Slay ✨

And on error, or when it's not a UMIP-protected instruction that can be emulated? You get -EINVAL 🙈 Periodt, that's the whole deal.

🦋 SEE ALSO

• Kernel file ./arch/x86/kernel/umip.c
• umip_printk(9)
• emulate_umip_insn(9)
• force_sig_info_umip_fault(9)
• fixup_umip_exception(9)

That's a wrap, bestie 💖 this little icon lives in the Kernel API Manual, comes straight out of ./arch/x86/kernel, and it's stamped October 2026 — go be the main character of your own kernel debugging session, iykyk 🌈🫶