[PATCH v2 0/4] gendwarfksyms: Add more kABI rules

[Sami Tolvanen <samitolvanen@google.com>]

Hi,

While looking deeper into the genksyms hacks that have been
needed during Android's 5.10 and 5.15 GKI lifecycles so far,
we found a few instances that are not covered by the existing
gendwarfksyms kABI stability rules. The first case involved
appending new members to a partially opaque data structure, and
the second case completely changing opaque types due to a large
backport that was necessary for both stability and security.

These patches add rules that allow distribution maintainers
to deal with structure size changes, and as a last resort, to
completely override a type string used for version calculation.

Sami

---
v2:
- Cleaned up type string parsing based on Petr's feedback.

v1: https://lore.kernel.org/r/20250430214049.2658716-6-samitolvanen@google.com/

---

Sami Tolvanen (4):
  gendwarfksyms: Clean up kABI rule look-ups
  gendwarfksyms: Add a kABI rule to override byte_size attributes
  gendwarfksyms: Add a kABI rule to override type strings
  Documentation/kbuild: Add new gendwarfksyms kABI rules

 Documentation/kbuild/gendwarfksyms.rst   | 103 ++++++++++++++--
 scripts/gendwarfksyms/dwarf.c            |  14 ++-
 scripts/gendwarfksyms/examples/kabi.h    |  21 +++-
 scripts/gendwarfksyms/examples/kabi_ex.c |   7 ++
 scripts/gendwarfksyms/examples/kabi_ex.h | 101 +++++++++++++++-
 scripts/gendwarfksyms/gendwarfksyms.h    |   2 +
 scripts/gendwarfksyms/kabi.c             | 143 ++++++++++++++---------
 scripts/gendwarfksyms/types.c            | 140 +++++++++++++++++++---
 8 files changed, 451 insertions(+), 80 deletions(-)


base-commit: 92a09c47464d040866cf2b4cd052bc60555185fb
-- 
2.49.0.967.g6a0df3ecc3-goog