elf32_checksum3

Usage

#include <libelf.h>
long int elf32_checksum(Elf *elf);
long int elf64_checksum(Elf *elf);

Overview

Compute a checksum for the ELF object file referred to by elf. The checksum is computed from permanent parts of the ELF file and the result is repeatable. To be repeatable, strippable sections are not included in computing the checksum. SHT_NOBITS sections are also not included when computing the checksum. The checksum can be used as a value for DT_CHECKSUM.

Parameters

elf

The ELF object file for which the checksum is to be computed.

Return value

On success, return the computed checksum. If an error occurs, return -1 and set a libelf error code. The checksum is always calculated as a 4-byte value. If long int is larger than 4 bytes, then the checksum will be extended by padding with zeros.

Attributes

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