setup_kdump_cmdline(9)

🎀 setup_kdump_cmdline(9) 🎀

okay bestie, welcome to the Kernel API Manual — this one's a lil powerpc-flavored gem and we're gonna get you so comfy with it 💖

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✨ NAME ✨

setup_kdump_cmdline — literally prepends "elfcorehdr=<addr> " to the command line of the kdump kernel so it can export the core 🫶

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🌸 SYNOPSIS 🌸

char * setup_kdump_cmdline (struct kimage *image , char *cmdline ,
       unsigned long cmdline_len );

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🦋 ARGUMENTS 🦋

• image — the kexec image, bestie. that's your main character ✨
• cmdline — the command line parameters you're updating 💅
• cmdline_len — the length of those cmdline parameters, not one byte more 🌸

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💜 DESCRIPTION 💜

so here's the vibe check: the kdump segment must be set up before you call this function. like, no cap, that's a prerequisite — do it first, periodt 🙈

on success it returns a new cmdline buffer for the kdump kernel 😭👑 and otherwise it returns NULL. that's the whole deal, iykyk.

lowkey important: kdump segment setup comes first. don't skip it, bestie 💀

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👑 SEE ALSO 👑

• Kernel file ./arch/powerpc/kexec/file_load.c — the file itself, iconic 🎀
• setup_purgatory(9) — go read this one too, fr fr ⭐

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and that's the page, bestie!! this cutie lives in the ./arch/powerpc/kexec source tree, dated October 2026, and it's filed under setup_kdump_cmdline(9) 💖✨ slay responsibly 🦋