vmcoredd_write_header(9)

💅 vmcoredd_write_header(9) — like, the Kernel API Manual page bestie 🎀

okay so before we even get into it — hi, this is a page from the Kernel API Manual, and it's all about vmcoredd_write_header. yes the name is a mouthful. no we're not scared of it. let's go 🦋

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✨ NAME ✨

vmcoredd_write_header — writes the vmcore device dump header right at the beginning of the dump's buffer. literally the first thing in the buffer. main character placement 💅

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✨ SYNOPSIS ✨

void vmcoredd_write_header (void *buf , struct vmcoredd_data *data , u32 size );

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🌸 ARGUMENTS 🌸

• buf — the output buffer, aka where the note actually gets written. it's giving "the canvas" 🎨
• data — the dump info. the vibes, the metadata, the whole situation 🫶
• size — size of the dump. you gotta know how big the thing is, obviously 💖

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💖 DESCRIPTION 💖

so what it does is: fills the beginning of the dump's buffer with the vmcore device dump header. that's it. that's the whole thing. it does NOT fill the end, it does NOT fill the middle — beginning of the dump's buffer, periodt 👑

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🔥 SEE ALSO 🔥

• Kernel file ./fs/proc/vmcore.c
• vmcore_alloc_buf(9)
• update_note_header_size_elf64(9)
• get_note_number_and_size_elf64(9)
• copy_notes_elf64(9)
• update_note_header_size_elf32(9)
• get_note_number_and_size_elf32(9)
• copy_notes_elf32(9)
• vmcoredd_update_program_headers(9)
• vmcoredd_update_size(9)
• vmcore_add_device_dump(9)

like a whole friend group fr fr, they all show up together 🧚✨

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ngl bestie, this one's short and sweet — no scary warnings, no deprecated flags, no trap doors. just a header, written at the beginning of a buffer. slay 💀✨

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k bye, this page came from ./fs/proc and it's dated October 2026 — so like, also from the future?? iconic 🌈⭐💜