[Bug 2035384] Re: Provide debug information for zipl and genprotimg

[Frank Heimes]

A corresponding package containing these debug symbols is available:
https://launchpad.net/ubuntu/+source/s390-tools/2.29.0-0ubuntu2/+build/26733459/+files/s390-tools-dbgsym_2.29.0-0ubuntu2_s390x.ddeb

$ readelf -n $(which genprotimg)

Displaying notes found in: .note.gnu.build-id
  Owner                Data size 	Description
  GNU                  0x00000014	NT_GNU_BUILD_ID (unique build ID bitstring)
    Build ID: 08c84b9992a613f0b679520774104856de52fdf1

Displaying notes found in: .note.ABI-tag
  Owner                Data size 	Description
  GNU                  0x00000010	NT_GNU_ABI_TAG (ABI version tag)
    OS: Linux, ABI: 3.2.0
$ readelf -n $(which zipl)

Displaying notes found in: .note.gnu.build-id
  Owner                Data size 	Description
  GNU                  0x00000014	NT_GNU_BUILD_ID (unique build ID bitstring)
    Build ID: 2ac0c097f3cc6881301d528e27a1c51fe895a17a

Displaying notes found in: .note.ABI-tag
  Owner                Data size 	Description
  GNU                  0x00000010	NT_GNU_ABI_TAG (ABI version tag)
    OS: Linux, ABI: 3.2.0
$ 

$ dpkg -c ./s390-tools-dbgsym_2.29.0-0ubuntu2_s390x.ddeb | grep c84b9992a613f0b679520774104856de52fdf1
-rw-r--r-- root/root    183912 2023-09-20 09:21 ./usr/lib/debug/.build-id/08/c84b9992a613f0b679520774104856de52fdf1.debug
$ dpkg -c ./s390-tools-dbgsym_2.29.0-0ubuntu2_s390x.ddeb | grep c0c097f3cc6881301d528e27a1c51fe895a17a
-rw-r--r-- root/root    298056 2023-09-20 09:21 ./usr/lib/debug/.build-id/2a/c0c097f3cc6881301d528e27a1c51fe895a17a.debug
$ 

And having the ddeb package installed makes the debug symbols usable in
gdb too:

$ gdb genprotimg
GNU gdb (Ubuntu 14.0.50.20230907-0ubuntu1) 14.0.50.20230907-git
Copyright (C) 2023 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "s390x-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from genprotimg...
Reading symbols from /usr/lib/debug/.build-id/08/c84b9992a613f0b679520774104856de52fdf1.debug...
(gdb) exit

$ gdb zipl
GNU gdb (Ubuntu 14.0.50.20230907-0ubuntu1) 14.0.50.20230907-git
Copyright (C) 2023 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "s390x-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from zipl...
Reading symbols from /usr/lib/debug/.build-id/2a/c0c097f3cc6881301d528e27a1c51fe895a17a.debug...
(gdb) exit

And for gentprotimg they exist for amd64 as well as for s390x.


Until a few days ago the debug info was not properly synched to DEBUGINFOD,
but this is now fixed.

$ DEBUGINFOD_URLS=https://debuginfod.ubuntu.com debuginfod-find debuginfo 08c84b9992a613f0b679520774104856de52fdf1
/home/ubuntu/.cache/debuginfod_client/08c84b9992a613f0b679520774104856de52fdf1/debuginfo
$ DEBUGINFOD_URLS=https://debuginfod.ubuntu.com debuginfod-find debuginfo 2ac0c097f3cc6881301d528e27a1c51fe895a17a
/home/ubuntu/.cache/debuginfod_client/2ac0c097f3cc6881301d528e27a1c51fe895a17a/debuginfo
$ 

** Description changed:

  Today the s390-tools package does not provide debug information for the
  zipl bootloader tool, nor for the genprotimg tool.
  
  But debug info is desired for zipl and genprotimg.
- 
- But both (zipl and genprotimg) don't have build-ids,
- since these are created as raw, hence don't have meta data (compared to the elf format).

** Changed in: s390-tools (Ubuntu)
     Assignee: (unassigned) => Frank Heimes (fheimes)

** Changed in: ubuntu-z-systems
     Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)

** Changed in: ubuntu-z-systems
       Status: New => Fix Released

** Changed in: s390-tools (Ubuntu)
       Status: New => Fix Released

-- 
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https://bugs.launchpad.net/bugs/2035384

Title:
  Provide debug information for zipl and genprotimg

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in s390-tools package in Ubuntu:
  Fix Released

Bug description:
  Today the s390-tools package does not provide debug information for
  the zipl bootloader tool, nor for the genprotimg tool.

  But debug info is desired for zipl and genprotimg.

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