Re: [musl] Tracking shared libraries in GDB not working?

[Rich Felker <dalias@libc.org>]

On Wed, Jan 18, 2023 at 12:14:28AM +0100, Hauke Mehrtens wrote:
> On 1/10/23 21:02, Hauke Mehrtens wrote:
> >On 1/9/22 06:14, Rich Felker wrote:
> >>On Mon, Dec 20, 2021 at 09:54:40AM +0100, d.dorau@avm.de wrote:
> >>>Thanks for your thoughts. I used them to search for further
> >>>information and found
> >>>the missing piece:
> >>>
> >>>https://lists.yoctoproject.org/g/yocto/message/48584
> >>>
> >>>I applied that first patch
> >>>https://lists.yoctoproject.org/g/yocto/attachment/48584/0/0007-Teach-dynlink.c-about-DT_MIPS_RLD_MAP_REL.patch
> >>>
> >>>and apparently it seems to solve the issue. :-)
> >>>
> >>>I did a search on this mailing list and couldn't find this
> >>>patch mentioned here.
> >>>Maybe you can include this patch in a future release if you
> >>>think the solution is correct.
> >>
> >>Thanks! This patch is not correct as-is, because the value of
> >>DT_MIPS_RLD_MAP_REL is only meaningful on mips and could be reused on
> >>other archs. But I've whipped up what I think is a correct version of
> >>it here (attached), using the same approach as used for
> >>DT_MIPS_RLD_MAP already. If you get a chance, please let me know if it
> >>works.
> >>
> >>Rich
> >Hi Rich,
> >
> >I tried your attached patch on a mips32 be system and it worked.
> >With this patch gdb was able to find the shared libraries which
> >were loaded with dlopen(). I tested this on OpenWrt 19.07 with
> >musl 1.1.24 and gdb 8.3.1 using gdbserver.
> >
> >It would be nice if you could add it to upstream musl libc.
> >
> >Hauke
> Hi,
> 
> This is also working fine for me with recent OpenWrt master using
> musl 1.2.3, gcc 12.2 and gdb 12.1.

Thanks for the data points and for bumping this. I'll go ahead and
apply it.

Rich