Hi Aaron,

Basically the same comments as for gelf_getlib. I believe this is about
a data structure shared between the MIPS linker and prelink, but
elfutils only supports the prelink case through SHT_GNU_LIBLIST.

On Wed, 2025-12-31 at 21:50 -0500, Aaron Merey wrote:
> Signed-off-by: Aaron Merey <[email protected]>
> ---
>  doc/Makefile.am       |  1 +
>  doc/gelf_update_lib.3 | 78 +++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 79 insertions(+)
>  create mode 100644 doc/gelf_update_lib.3
> 
> diff --git a/doc/Makefile.am b/doc/Makefile.am
> index 9917d399..fc29c2ff 100644
> --- a/doc/Makefile.am
> +++ b/doc/Makefile.am
> @@ -115,6 +115,7 @@ notrans_dist_man3_MANS= elf32_checksum.3 \
>                       gelf_offscn.3 \
>                       gelf_update_ehdr.3 \
>                       gelf_update_dyn.3 \
> +                     gelf_update_lib.3 \
>                       gelf_update_move.3 \
>                       gelf_update_phdr.3 \
>                       gelf_update_shdr.3 \

OK.

> diff --git a/doc/gelf_update_lib.3 b/doc/gelf_update_lib.3
> new file mode 100644
> index 00000000..06f10391
> --- /dev/null
> +++ b/doc/gelf_update_lib.3
> @@ -0,0 +1,78 @@
> +.TH GELF_UPDATE_lib 3 2025-12-31 "Libelf" "Libelf Programmer's Manual"
> +
> +.SH NAME
> +gelf_update_lib \- Update library in table at the given index

Maybe insert prelink?

> +.SH SYNOPSIS
> +.nf
> +.B #include <gelf.h>
> +
> +.BI "int gelf_update_lib (Elf_Data *" data ", int " ndx ", GElf_Lib *" src 
> ");"

OK.

> +.SH DESCRIPTION
> +Copy a class\-independent library table entry from

prelink?

> +.I src
> +into the
> +.B SHT_MIPS_LIBLIST
> +section associated with
> +.I data
> +at index
> +.IR ndx .

SHT_GNU_LIBLIST with d_type ELF_T_LIB?

> +.SH PARAMETERS
> +.TP
> +.I data
> +Pointer to an
> +.B Elf_Data
> +associated with a section with type
> +.BR SHT_MIPS_LIBLIST .

Likewise?

> +.TP
> +.I ndx
> +Zero\-based index of the library table entry to be updated within
> +.IR data .
> +
> +.TP
> +.I src
> +Pointer to a caller\-provided library table entry.
> +.I src
> +must not be NULL.

OK.

> +.SH RETURN VALUE
> +On success, this function returns a non-zero value and updates
> +the library table entry at index
> +.I ndx
> +in
> +.IR data .
> +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 and elf_errno is not set.

OK.

> +.SH SEE ALSO
> +.BR gelf_getlib (3),
> +.BR libelf (3),
> +.BR elf (5)

Where are Elf32_Lib, Elf64_Lib or GElf_Lib described?

> +.SH ATTRIBUTES
> +.TS
> +allbox;
> +lbx lb lb
> +l l l.
> +Interface    Attribute       Value
> +T{
> +.na
> +.nh
> +.BR gelf_update_lib ()
> +T}   Thread safety   MT-Safe
> +.TE
> +
> +.SH REPORTING BUGS
> +Report bugs to <[email protected]> or 
> https://sourceware.org/bugzilla/.
> +
> +.SH HISTORY
> +.B gelf_update_lib
> +first appeared in elfutils 0.95.

elfutils extension?

Thanks,

Mark

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