.TH GELF_UPDATE_SYMINFO 3 2025-12-30 "Libelf" "Libelf Programmer's Manual"

.SH NAME
gelf_update_syminfo \- Update additional symbol information in the symbol table at the given index

.SH SYNOPSIS
.nf
.B #include <gelf.h>

.BI "int gelf_update_syminfo (Elf_Data *" data ", int " ndx ", GElf_Syminfo *" src ");"

.SH DESCRIPTION
Copy a class\-independent additional symbol information entry from
.I src
into the
.B SHT_SUNW_syminfo
section associated with
.I data
at entry index
.IR ndx .

.I data
should be associated with an ELF section with type
.B SHT_SUNW_syminfo
and data type
.BR ELF_T_SYMINFO .
These types are Sun/Solaris extensions and are not typically used in GNU/Linux
ELF files.

.SH PARAMETERS
.TP
.I data
Pointer to an
.B Elf_Data
associated with an ELF section with type
for a section with type
.B SHT_SUNW_syminfo
and data type
.BR ELF_T_SYMINFO .

.TP
.I ndx
Zero\-based index of the entry in
.I data
to be updated.

.TP
.I src
Pointer to a caller\-provided additional symbol information entry.  Must not
be NULL.

.SH RETURN VALUE
On success, this function returns a non-zero value and updates
.I data
with
.I src
at index
.IR ndx .
The section associated with
.I data
is flagged with
.BR ELF_F_DIRTY .
On failure, zero is returned and elf_errno is set.  If
.I data
is NULL, then zero is returned without setting elf_errno.

.SH SEE ALSO
.BR gelf_getsym (3),
.BR gelf_getsyminfo (3),
.BR libelf (3),
.BR elf (5)

.SH ATTRIBUTES
.TS
allbox;
lbx lb lb
l l l.
Interface	Attribute	Value
T{
.na
.nh
.BR gelf_update_syminfo ()
T}	Thread safety	MT-Safe
.TE

.SH REPORTING BUGS
Report bugs to <elfutils-devel@sourceware.org> or https://sourceware.org/bugzilla/.