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GELF_GETDYN(3)             Library Functions Manual             GELF_GETDYN(3)

NAME
     gelf_getdyn, gelf_update_dyn - read and update ELF dynamic entries

LIBRARY
     ELF Access Library (libelf, -lelf)

SYNOPSIS
     #include <gelf.h>

     GElf_Dyn *
     gelf_getdyn(Elf_Data *data, int ndx, GElf_Dyn *dyn);

     int
     gelf_update_dyn(Elf_Data *data, int ndx, GElf_Dyn *dyn);

DESCRIPTION
     These convenience functions are used to retrieve and update class-
     dependent Elf32_Dyn or Elf64_Dyn information in the dynamic table of an
     ELF object.

     Argument data is an Elf_Data descriptor associated with a section of type
     SHT_DYNAMIC.  Argument ndx is the index of the entry being retrieved or
     updated.  The class-independent GElf_Dyn structure is described in
     gelf(3).

     Function gelf_getdyn() retrieves the class-dependent entry at index ndx
     in data buffer data and copies it to the destination pointed to by
     argument dyn after translation to class-independent form.

     Function gelf_update_dyn() converts the class-independent entry pointed
     to by argument dyn to class-dependent form, and writes it to the entry at
     index ndx in the data buffer described by argument data.  Function
     gelf_update_dyn() signals an error if any of the values in the class-
     independent representation exceeds the representable limits of the target
     type.

RETURN VALUES
     Function gelf_getdyn() returns the value of argument dyn if successful,
     or NULL in case of an error.  Function gelf_update_dyn() returns a non-
     zero value if successful, or zero in case of an error.

ERRORS
     These functions may fail with the following errors:

     [ELF_E_ARGUMENT]  Arguments data or dyn were NULL.

     [ELF_E_ARGUMENT]  Argument ndx was less than zero or larger than the
                       number of entries in the data descriptor.

     [ELF_E_ARGUMENT]  Data descriptor data was not associated with a section
                       of type SHT_DYNAMIC.

     [ELF_E_RANGE]     A value was not representable in the target type.

     [ELF_E_VERSION]   The Elf_Data descriptor denoted by argument data is
                       associated with an ELF object with an unsupported
                       version.

SEE ALSO
     elf(3), elf_getdata(3), elf_getscn(3), gelf(3)

NetBSD 10.99                    April 22, 2019                    NetBSD 10.99