ELF32_CHECKSUM(3)         Libelf Programmer's Manual         ELF32_CHECKSUM(3)



NAME
       elf32_checksum, elf64_checksum - compute the checksum for a 32-bit or
       64-bit ELF object file


SYNOPSIS
       #include <libelf.h>

       long int elf32_checksum(Elf *elf);
       long int elf64_checksum(Elf *elf);


DESCRIPTION
       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.


SEE ALSO
       elf_errno(3), libelf(3), elf(5)


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

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |elf32_checksum (), elf64_checksum ()        | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+

REPORTING BUGS
       Report bugs to <elfutils-devel@sourceware.org> or
       https://sourceware.org/bugzilla/.

Libelf                            2024-08-14                 ELF32_CHECKSUM(3)