sync_backup_region_phdr(9)

💖 sync_backup_region_phdr(9) 💖 — Kernel API Manual, bestie ✨

okay so welcome to the Kernel API Manual page for sync_backup_region_phdr(9) — this is the group chat where we synchronize the backup region offset between the kexec image and the ELF core header. No cap, that's the whole vibe. 🫶

✨ NAME ✨

sync_backup_region_phdr — synchronizes the backup region offset between the kexec image and the ELF core header. Periodt. 💅

🌸 SYNOPSIS 🌸

void sync_backup_region_phdr (struct kimage *image , Elf64_Ehdr *ehdr ,
       bool phdr_to_kimage );

💜 ARGUMENTS 💜

• image — Kexec image. Like, the kexec image in question, bestie. 🖼️
• ehdr — ELF core header. The ELF core header, exactly. 🧚
• phdr_to_kimage — If true, read the offset from the ELF program header and update the kimage backup region. If false, update the ELF program header offset from the kimage backup region. Direction matters, okay? 🔁

🎀 NOTE 🎀

okay so during kexec_load, this is called with phdr_to_kimage = true. For kexec_file_load and ELF core header recreation during memory hotplug events, it is called with phdr_to_kimage = false.

Returns nothing. Yep, literally no return value — it's giving void main character energy. 💀✨

🦋 SEE ALSO 🦋

• Kernel file ./arch/powerpc/kexec/crash.c: update_crash_elfcorehdr(9), get_fdt_index(9), update_crash_fdt(9), arch_crash_handle_hotplug_event(9) — go read these too, bestie, iykyk. 📚

okay bye bestie 💋 this sync_backup_region_phdr(9) page is from ./arch/powerpc/kexec and dated October 2026 — slay and see you in the kernel source. 🌈👑