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



NAME
       gelf_update_ehdr - copy a class-independent ELF header into an ELF
       descriptor


SYNOPSIS
       #include <gelf.h>

       int gelf_update_ehdr(Elf *elf, GElf_Ehdr *src);


DESCRIPTION
       gelf_update_ehdr() copies the class-independent ELF header from the
       structure pointed to by src into the ELF descriptor elf .  The header
       is translated as necessary to match the class ( ELFCLASS32 or
       ELFCLASS64) of the underlying object.

       If elf has class ELFCLASS32 then e_entry, e_phoff and e_shoff must be
       expressible as 32-bit values.  This function also marks the Ehdr dirty
       (see elf_flagehdr()).


PARAMETERS
       elf    Pointer to an ELF descriptor of kind ELF_K_ELF.


       src    Pointer to a GElf_Ehdr structure that holds the caller's desired
              header contents. Must not be NULL.


RETURN VALUE
       On success, gelf_update_ehdr() returns a non-zero value.  On failure,
       it returns 0 and sets elf_errno.  If elf is NULL, then 0 is returned
       without setting elf_errno.


SEE ALSO
       gelf_getehdr(3), gelf_newehdr(3), elf_flagehdr(3), libelf(3), elf(5)


ATTRIBUTES

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |gelf_update_ehdr ()                         | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+

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

Libelf                            2025-09-17               GELF_UPDATE_EHDR(3)