efi_exit_boot_services(9)

💅 efi_exit_boot_services (9) — the kernel API manual, bestie edition 🎀

okay so you found the efi_exit_boot_services(9) page, iconic, this is the kernel API manual one, not your regular commands 💖 let's get into it

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✨ NAME ✨

efi_exit_boot_services — exit boot services 🚪✨ (yes literally that, bestie says what it does on the tin)

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🦋 SYNOPSIS 🦋

efi_status_t efi_exit_boot_services (void *handle , void *priv ,
       efi_exit_boot_map_processing priv_func );

like look at her. three args. one job. slay 💅

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🌸 ARGUMENTS 🌸

• handle — the handle of the exiting image 👋 like who's leaving the party
• priv — the argument that gets passed along to priv_func, it's the little bag of stuff you're handing over 🎀
• priv_func — the function that processes the memory map before exiting boot services, like a quick vibe check on the map before we dip 🗺️✨

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💜 DESCRIPTION 💜

okay so here's the tea 🍓 this handles calling ExitBootServices according to the requirements set out by the spec — no cap, the spec is the boss here.

It obtains the current memory map, and returns that info after calling ExitBootServices. so basically: grab the map, do the exit, hand the info back 🫶

the client must specify a function to perform any processing of the memory map data prior to ExitBootServices. not optional. mandatory. periodt 💀

A client specific structure may be passed to that function via priv — that's literally what priv is for, bestie 🎁

And heads up: the client function may be called multiple times. like not just once. multiple. so don't go assuming it's a one-and-done situation 😭

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⭐ RETURN ⭐

status code — that's it, that's the return, a status code, go check it 👑

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/firmware/efi/libstub/efi-stub-helper.c
• efi_parse_options(9)
• get_efi_config_table(9)
• efi_load_initrd_dev_path(9)
• efi_load_initrd(9)
• efi_wait_for_key(9)
• efi_remap_image(9)

all the cousins, the whole friend group, go read them too 💕

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🧚 lowkey reminder: this is kernel API business, so keep the details exact, the vibes are yours but the facts are the spec's 💅

okay that's the page!! this one lives over in ./drivers/firmware/efi/libstub, dated October 2026, and it's page efi_exit_boot_services(9) of the Kernel API Manual — stan forever, bye bestie 👑💖✨