ELF32_GETCHDR(3)

✨ ELF32_GETCHDR(3) ✨

okay bestie, sit down, hydrate, and let me tell you about elf32_getchdr and elf64_getchdr — two lil functions from the Libelf Programmer's Manual whose whole entire job is grabbing the compression header for a section out of a 32-bit or 64-bit ELF object file. yes ma'am, that's the vibe. 💅

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🎀 NAME 🎀

elf32_getchdr, elf64_getchdr — retrieve the compression header for a section from a 32-bit or 64-bit ELF object file. it's giving "where's the compression info, bestie?" and the answer is right here. 🫶

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🦋 SYNOPSIS 🦋

#include <libelf.h>

Elf32_Chdr *elf32_getchdr(Elf_Scn *scn);
Elf64_Chdr *elf64_getchdr(Elf_Scn *scn);

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🌸 DESCRIPTION 🌸

So like, this function retrieves the compression header for a section that has compressed data. how do you know a section is serving compressed-data realness? it's got the SHF_COMPRESSED flag set, periodt. 🎀

want the whole lore on what a compression header even is? check out libelf(3) — it spills all the tea. no cap. ✨

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💜 PARAMETERS 💜

• scn — the section whose compression header is getting retrieved, iykyk. and listen: that section's SHF_COMPRESSED flag must be set. like, it's not optional, bestie. it's the whole prerequisite. 🚨

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👑 RETURN VALUE 👑

on success? you get a pointer to the compression header. iconic. 🌟

on failure? you get NULL, and a libelf error code gets set. it's giving "something went wrong and we're telling you about it". check elf_errno(3) if you wanna know the deets. 😭

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💖 SEE ALSO 💖

• elf_compress(3)
• elf_errno(3)
• libelf(3)
• elf(5)

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⭐ ATTRIBUTES ⭐

for an explanation of the terms used in this section, see attributes(7).

• Interface: elf32_getchdr(), elf64_getchdr()
• Attribute: Thread safety
• Value: MT-Safe

translation: she's MT-Safe, bestie. you can thread her. 🌈

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🙈 REPORTING BUGS 🙈

found a bug? don't be shy, tell the people:

• email: <elfutils-devel@sourceware.org>
• or file it at: <https://sourceware.org/bugzilla/>

they wanna hear it, fr fr. 💀

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🧚 HISTORY 🧚

elf32_getchdr first appeared in elfutils 0.165. a true queen, an OG, a legend. 👑

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okay that's the whole page, mwah 💋 — this was the Libelf manual, dated 2024-08-14, and the source/version tag on this whole thing is Libelf. bye bestie, go compress something responsibly 🫶✨