From: "H.J. Lu" <hjl.tools@gmail.com>
To: Fangrui Song <maskray@google.com>
Cc: Florian Weimer <fweimer@redhat.com>,
"H.J. Lu via Libc-alpha" <libc-alpha@sourceware.org>
Subject: Re: [PATCH v2] Enable DT_RELR in glibc shared libraries and PIEs automatically
Date: Fri, 20 May 2022 18:51:15 -0700 [thread overview]
Message-ID: <CAMe9rOo1EDvVn4QE2POnBAskAPH8cnALiM8VGj2ApX3NQ1YB8w@mail.gmail.com> (raw)
In-Reply-To: <20220520225009.mfkzwang4spyznee@google.com>
On Fri, May 20, 2022 at 3:50 PM Fangrui Song via Libc-alpha
<libc-alpha@sourceware.org> wrote:
>
> On 2022-05-16, Florian Weimer via Libc-alpha wrote:
> >* H. J. Lu via Libc-alpha:
> >
> >> Enable DT_RELR in glibc shared libraries and position independent
> >> executables (PIE) automatically if linker supports -z
> >> pack-relative-relocs.
> >
> >Thanks for updating the commit subject.
> >
> >Reviewed-by: Florian Weimer <fweimer@redhat.com>
> >
> >Florian
> >
>
> Thanks for the patch.
>
> Question: does gdb need DT_RELR support to debug such a shared object?
> `gdb elf/ld.so` will report
>
> BFD: path/to/elf/ld.so: unknown type [0x13] section `.relr.dyn'
>
> but I do not know whether any functionality is affected in the absence
> of SHT_RELR support.
You need GDB 12 or 11.2 for DT_RELR.
--
H.J.
prev parent reply other threads:[~2022-05-21 1:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-16 13:17 H.J. Lu
2022-05-16 13:44 ` Florian Weimer
2022-05-20 22:50 ` Fangrui Song
2022-05-21 1:51 ` H.J. Lu [this message]
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