elf_hash(3)

elf_hash3

Compute the standard elf hash or gnu hash of a string.

Usage

#include <libelf.h>
unsigned long int elf_hash(const char *string);
unsigned long int elf_gnu_hash(const char *string);

Overview

The elf_hash function computes the standard ELF hash value for a null-terminated string. The hash values are typically used in ELF object files for symbol table hashing. The hash function is used in SHT_HASH sections as it avoids generating architecture-dependent values and is suitable for use across architectures.

The elf_gnu_hash function computes the GNU-style hash value of a null-terminated string, used in the SHT_GNU_HASH section.

Parameters

string

NULL-terminated string to be hashed.

Return value

These functions return a hash value for string. Only the lower 32 bits of the return value are used.

Attributes

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

InterfaceAttributeValue
elf_hash(), elf_gnu_hash()Thread safetyMT-Safe

Reporting bugs

Report bugs to <[email protected]> or https://sourceware.org/bugzilla/.

History

elf_gnu_hash first appeared in elfutils 0.122. This function is a elfutils libelf extension and may not be available in other libelf implementations.

From libelf 0.197-1 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.