ELF_HASH(3)

💖 ELF_HASH(3) 💖

okay bestie, welcome to libelf's cute lil hash corner, from the Libelf Programmer's Manual ✨ this page covers elf_hash and elf_gnu_hash — yes they're basically twins, and yes you're gonna love them 💅

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🌸 NAME 🌸

elf_hash, elf_gnu_hash — compute the standard ELF hash or GNU hash of a string 🧚

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✨ SYNOPSIS ✨

#include <libelf.h>

unsigned long int elf_hash(const char *string);
unsigned long int elf_gnu_hash(const char *string);

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🦋 DESCRIPTION 🦋

so elf_hash computes the standard ELF hash value for a null-terminated string, periodt. these hash values are typically used in ELF object files for symbol table hashing — very demure, very mindful 🎀

the way this one is used in SHT_HASH sections… it's because it avoids generating architecture-dependent values and is suitable for use across architectures. it's giving portable queen 👑

meanwhile elf_gnu_hash computes the GNU-style hash value of a null-terminated string, and it's the one used in the SHT_GNU_HASH section. different section, same slay 🌈

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🎀 PARAMETERS 🎀

• string — a NULL-terminated string to be hashed. give it a string, bestie, and it gets hashed 💜

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⭐ RETURN VALUE ⭐

these functions return a hash value for string. but lowkey important: only the lower 32 bits of the return value are used 👀 so don't go getting attached to the whole unsigned long int, ok?

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👑 SEE ALSO 👑

• libelf(3)
• elf(5)

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💅 ATTRIBUTES 💅

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

• elf_hash(), elf_gnu_hash() — Thread safety: MT-Safe 🔥 (yes bestie, they're thread-safe, we love to see it)

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😭 REPORTING BUGS 😭

found a bug? not the vibe fr fr. report it to <elfutils-devel@sourceware.org> or hit up https://sourceware.org/bugzilla/ 🫶

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🕰️ HISTORY 🕰️

elf_gnu_hash first appeared in elfutils 0.122 🌟

⚠️ heads up bestie: this function is an elfutils libelf extension and may not be available in other libelf implementations. so like… vibe check your libelf before you commit, iykyk 💀

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and that's the whole page, no cap. this cutie dropped as part of Libelf, dated 2025-03-31, filed under ELF_HASH(3) — go forth and hash responsibly, bestie 💖✨🎀🦋🌸💅🫶