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 descrip-
     tor


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 struc-
     ture pointed to by src into the ELF descriptor elf .  The header is  trans-
     lated  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  ex-
     pressible	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  calleras	 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
     allbox; lbx lb lb l l l.  Interface Attribute Value T{ gelf_update_ehdr()
     T}	  Thread safety	  MT-Safe


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

Libelf				   2025-09-17		     GELF_UPDATE_EHDR(3)