GELF_GETREL(3) BSD Library Functions Manual GELF_GETREL(3)
NAME
gelf_getrel, gelf_update_rel -- read and update ELF relocation entries
LIBRARY
ELF Access Library (libelf, -lelf)
SYNOPSIS
#include <gelf.h>
GElf_Rel *
gelf_getrel(Elf_Data *data, int ndx, GElf_Rel *rel);
int
gelf_update_rel(Elf_Data *data, int ndx, GElf_Rel *rel);
DESCRIPTION
These convenience functions are used to retrieve and update class-dependent Elf32_Rel or Elf64_Rel structures in an ELF object.
Argument data is an Elf_Data descriptor associated with a section of type SHT_REL. Argument ndx is the index of the entry being retrieved or
updated. The class-independent GElf_Rel structure is described in gelf(3).
Function gelf_getrel() retrieves the class-dependent entry at index ndx in data buffer data and copies it to the destination pointed to by
argument rel after translation to class-independent form.
Function gelf_update_rel() converts the class-independent entry pointed to by argument rel to class-dependent form, and writes it to the
entry at index ndx in the data buffer described by argument data. Function gelf_update_rel() 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_getrel() returns the value of argument rel if successful, or NULL in case of an error. Function gelf_update_rel() 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 rel 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_REL.
[ELF_E_RANGE] A value was not representable in the target type.
SEE ALSO
elf(3), elf_getdata(3), elf_getscn(3), gelf(3)
BSD
August 29, 2006 BSD
