GELF_GETSYM(3) BSD Library Functions Manual GELF_GETSYM(3)NAME
gelf_getsym, gelf_update_sym — read and update symbol information
LIBRARY
library “libelf”
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-depen‐
dent 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 informa‐
tion 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 num‐
ber 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.
SEE ALSOelf(3), elf_getdata(3), elf_getscn(3), gelf(3), gelf_getsyminfo(3),
gelf_update_syminfo(3)BSD August 29, 2006 BSD
