NetBSD Problem Report #59364

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Date: Sat, 26 Apr 2025 20:57:30 +0000 (UTC)
From: campbell+netbsd@mumble.net
Reply-To: campbell+netbsd@mumble.net
To: gnats-bugs@NetBSD.org
Subject: ctf tools needs update
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>Number:         59364
>Category:       toolchain
>Synopsis:       ctf tools needs update
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 26 21:00:01 +0000 2025
>Last-Modified:  Wed Jun 04 19:35:01 +0000 2025
>Originator:     Taylor R Campbell
>Release:        current
>Organization:
The NetCTF Updation
>Environment:
>Description:
I tried using -Wl,-z,pack-relative-relocs (see PR bin/59360: ld.elf_so(8): missing RELR support, https://gnats.NetBSD.org/59360) and nbctfmerge failed with:

ERROR: nbctfmerge: h_r_relative_pack: Cannot get sect .relr.dyn data: Invalid section descriptor

ctf upstream probably also supports >32k types these days (not verified) which will help us avoid hitting limits in the kernel that break dtrace type information too.
>How-To-Repeat:
enable newfangled linker toys like -Wl,-z,pack-relative-relocs in a MKCTF=yes build
>Fix:
Yes, please!

>Audit-Trail:
From: matthew green <mrg@eterna23.net>
To: gnats-bugs@netbsd.org
Cc: toolchain-manager@netbsd.org, gnats-admin@netbsd.org,
    netbsd-bugs@netbsd.org
Subject: re: toolchain/59364: ctf tools needs update
Date: Mon, 28 Apr 2025 07:15:04 +1000

 yes please.

 also see PR#57664: ctf tools don't handle DWARF version 5.

 our in-tree GCC has a patch to default to version 4.


 .mrg.

From: Christos Zoulas <christos@zoulas.com>
To: matthew green <mrg@eterna23.net>
Cc: gnats-bugs@netbsd.org,
 toolchain-manager@netbsd.org,
 gnats-admin@netbsd.org,
 netbsd-bugs@netbsd.org
Subject: Re: toolchain/59364: ctf tools needs update
Date: Wed, 4 Jun 2025 15:34:15 -0400

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 This is not a problem with CTF. It just calls elf_getdata() from =
 elftoolchain and libelf does
 not support reading the .relr.dyn section. I suspect the same issue with =
 DWARF 4 vs 5.
 libdwarf in elftoolchain needs updating....

 christos=

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