From: Aaron Merey <amerey@redhat.com>
Date: Thu, 1 Jan 2026 02:50:37 +0000 (-0500)
Subject: doc: Add gelf_update_dyn.3
X-Git-Tag: elfutils-0.195~33
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af64dd3ae4fba7ca3ad47489047d014929f98de6;p=thirdparty%2Felfutils.git

doc: Add gelf_update_dyn.3

Signed-off-by: Aaron Merey <amerey@redhat.com>
---

diff --git a/doc/Makefile.am b/doc/Makefile.am
index fbbd254f..89a1834c 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -112,6 +112,7 @@ notrans_dist_man3_MANS= elf32_checksum.3 \
 			gelf_newphdr.3 \
 			gelf_offscn.3 \
 			gelf_update_ehdr.3 \
+			gelf_update_dyn.3 \
 			gelf_update_phdr.3 \
 			gelf_update_shdr.3 \
 			gelf_update_rel.3 \
diff --git a/doc/gelf_update_dyn.3 b/doc/gelf_update_dyn.3
new file mode 100644
index 00000000..df72140f
--- /dev/null
+++ b/doc/gelf_update_dyn.3
@@ -0,0 +1,86 @@
+.TH GELF_UPDATE_DYN 3 2025-12-30 "Libelf" "Libelf Programmer's Manual"
+
+.SH NAME
+gelf_update_dyn \- Update class\-independent information in the dynamic table at the given index
+
+.SH SYNOPSIS
+.nf
+.B #include <gelf.h>
+
+.BI "int gelf_update_dyn (Elf_Data *" data ", int " ndx ", GElf_Dyn *" src ");"
+
+.SH DESCRIPTION
+Copy a class\-independent dynamic table entry from
+.I src
+into the
+.B SHT_DYNAMIC
+section associated with
+.I data
+at index
+.IR ndx .
+
+.SH PARAMETERS
+.TP
+.I data
+Pointer to an
+.B Elf_Data
+associated with a section with type
+.BR SHT_DYNAMIC .
+.I data->d_type
+should be
+.BR ELF_T_DYN .
+
+.TP
+.I ndx
+Zero\-based index of the dynamic table entry to be updated within
+.IR data .
+
+.TP
+.I src
+Pointer to a caller\-provided dynamic table entry.  For
+.B ELFCLASS32
+binaries,
+.B d_tag
+should be able to fit within a signed 32-bit value
+while
+.B d_val
+and
+.B d_ptr
+should be able to fit within unsigned 32-bit values.
+.I src
+must not be NULL.
+
+.SH RETURN VALUE
+On success, this function returns a non-zero value and updates
+the dynamic table entry at index
+.I ndx
+in
+.IR data .
+The dynamic table 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 and elf_errno is not set.
+
+.SH SEE ALSO
+.BR gelf_getdyn (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_dyn ()
+T}	Thread safety	MT-Safe
+.TE
+
+.SH REPORTING BUGS
+Report bugs to <elfutils-devel@sourceware.org> or https://sourceware.org/bugzilla/.