[PATCH 0/8] Fixes for the system-wide tunables support

[Adhemerval Zanella]

While going back over the system-wide tunables support (the
/etc/tunables.conf data stored in ld.so.cache) I found some minor
problems (I missed the last version of that series before it went in).

The following are bugfixes and are important for the next release:

  - Add system-wide tunables: implement overridability
  - elf: Bound the tunable cache string table against the mapping size
  - elf: Verify the tunable cache header signature and version
  - elf: Avoid redundant ld.so.cache reload after first load
  - elf: Let environment aliases override overridable system-wide tunables

The remaining patches are cleanup and documentation with no urgency, but
I still think we should have for 2.44 since it is the first version
with system-wide tunables.

This ison top of DJ patch for system-wide tunable overridability [1].

[1] https://sourceware.org/pipermail/libc-alpha/2026-July/178518.html

Adhemerval Zanella (8):
  elf: Bound the tunable cache string table against the mapping size
  elf: Verify the tunable cache header signature and version
  elf: Avoid redundant ld.so.cache reload after first load
  elf: Let environment aliases override overridable system-wide tunables
  elf: Emit tunconf "not recognized" warning on stderr
  manual: Document default AT_SECURE handling for system-wide tunables
  elf: Remove _dl_unload_cache
  elf: Remove unused tunable_seclevel_t

 elf/Makefile                            |  7 +++-
 elf/dl-cache.c                          | 47 +++++++++++++------------
 elf/dl-open.c                           |  5 ---
 elf/dl-tunable-types.h                  | 14 --------
 elf/dl-tunables.c                       | 20 +++++++++--
 elf/rtld.c                              |  5 ---
 elf/tst-tunconf1.c                      | 24 +++++++++++++
 elf/tst-tunconf1.root/etc/tunables.conf |  9 +++++
 elf/tunconf.c                           |  4 +--
 manual/tunables.texi                    | 16 +++++++++
 sysdeps/generic/ldsodefs.h              |  6 ----
 11 files changed, 100 insertions(+), 57 deletions(-)

-- 
2.43.0