DEFINE_IDTENTRY_DF(9)

🎀 DEFINE_IDTENTRY_DF(9) 🎀

okay so bestie, welcome to the Kernel API Manual corner of the group chat 💖. Today's main character is DEFINE_IDTENTRY_DF(9), and we're gonna get you comfy with it without skipping a single detail. periodt. ✨

✨ NAME ✨

DEFINE_IDTENTRY_DF — literally "Emit code for double fault on 32bit" 🫶. That's the whole vibe: it's the macro situation for emitting code for a double fault on 32bit. This macro ate and left no crumbs, no cap. 👑

🦋 SYNOPSIS 🦋

the call looks like this, character for character 👑:

DEFINE_IDTENTRY_DF (func );

💖 ARGUMENTS 💖

• func — the function name of the entry point. That's it. That's the argument. She's lowkey essential though — slay 👑.

🔥 DESCRIPTION 🔥

okay so here's the tea: this is called through the doublefault shim — yes, that's its actual name — and that shim already provides cr2 in the address argument. So the shim is doing the pre-work, and DEFINE_IDTENTRY_DF is the macro that emits the code for the double fault on 32bit. It's giving iconic teamwork, fr fr ✨.

🌈 SEE ALSO 🌈

if you wanna fall down the rabbit hole, these are the besties and the kernel file to check out 💅:

• Kernel file: ./arch/x86/include/asm/idtentry.h — that's the home base 🏠
• DECLARE_IDTENTRY(9)
• DEFINE_IDTENTRY(9)
• DECLARE_IDTENTRY_ERRORCODE(9)
• DEFINE_IDTENTRY_ERRORCODE(9)
• DECLARE_IDTENTRY_RAW(9)
• DEFINE_IDTENTRY_RAW(9)
• DEFINE_FREDENTRY_RAW(9)
• DECLARE_IDTENTRY_RAW_ERRORCODE(9)
• DEFINE_IDTENTRY_RAW_ERRORCODE(9)
• DECLARE_IDTENTRY_IRQ(9)
• DEFINE_IDTENTRY_IRQ(9)
• DECLARE_IDTENTRY_SYSVEC(9)
• DEFINE_IDTENTRY_SYSVEC(9)
• DEFINE_IDTENTRY_SYSVEC_SIMPLE(9)
• DECLARE_IDTENTRY_XENCB(9)
• DECLARE_IDTENTRY_IST(9)
• DECLARE_IDTENTRY_VC(9)
• DEFINE_IDTENTRY_IST(9)
• DEFINE_IDTENTRY_NOIST(9)
• DECLARE_IDTENTRY_DF(9)
• DECLARE_IDTENTRY_DF(9) — yes, it's listed twice in the original, so we're keeping both because details are sacred 💀

💌 cute sign-off: this page comes from the source/version situation ./arch/x86/include/asm, dated October 2026, and it's bringing you DEFINE_IDTENTRY_DF(9) energy. byeee 🎀✨