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GELF_GETSYM(3)             Library Functions Manual             GELF_GETSYM(3)

NAME
     gelf_getsym, gelf_update_sym - read and update symbol information

LIBRARY
     ELF Access Library (libelf, -lelf)

SYNOPSIS
     #include <gelf.h>

     GElf_Sym *
     gelf_getsym(Elf_Data *data, int ndx, GElf_Sym *sym);

     int
     gelf_update_sym(Elf_Data *data, int ndx, GElf_Sym *sym);

DESCRIPTION
     These convenience functions are used to retrieve and update class-
     dependent Elf32_Sym and Elf64_Sym structures in an ELF object.

     Argument data is an Elf_Data descriptor associated with a section of type
     SHT_SYMTAB, SHT_DYNSYM or SHT_GNU_versym.  Argument ndx is the index of
     the symbol being retrieved or updated.  The class-independent GElf_Sym
     structure is described in gelf(3).

     Function gelf_getsym() retrieves class-dependent symbol information at
     index ndx in data buffer data and copies it to the destination pointed to
     by argument sym after translation to class-independent form.

     Function gelf_update_sym() converts the class-independent symbol
     information pointed to by argument sym to class-dependent form, and
     writes it to the symbol entry at index ndx in the data buffer described
     by argument data.  Function gelf_update_sym() 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_getsym() returns the value of argument sym if successful,
     or NULL in case of an error.  Function gelf_update_sym() 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 sym were NULL.

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

     [ELF_E_ARGUMENT]  Data descriptor data was not associated with a section
                       containing symbol information.

     [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), gelf_getsyminfo(3),
     gelf_update_syminfo(3)

NetBSD 10.99                    April 22, 2019                    NetBSD 10.99