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gelf_getdyn, gelf_update_dyn - read and update ELF dynamic entries

 

NAME

      gelf_getdyn, gelf_update_dyn - read and update ELF dynamic entries
 

LIBRARY

      library “libelf”
 

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-depen‐
      dent 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 argu‐
      ment 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.
      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 num‐
                        ber 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(3), elf_getdata(3), elf_getscn(3), gelf(3)
 

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