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h=from:subject; bh=Pu+rvPKMvPwl+p+ShOL+ySOcF9CZrqg5DPqa/1mEDiA=; b=owGbwMvMwCEWxa662nLh8irG02pJDBmSOoXneDPO/0hx9lndFai1+Jo2z4Ijb2eV2thWTX6bW BbQvkOno5SFQYyDQVZMkaXl6+qtu787pb76XCQBM4eVCWQIAxenAExEZDEjwyTZm88lZvf8ebf5 hNjCbRHL2cuO7VWeq1122yxA8Yf+lN8M/5TXRSlErbVfrfB37/pv3Bwv72z4mH9S467Q1NpnSh9 COdgB X-Mailer: git-send-email 2.49.0.967.g6a0df3ecc3-goog Message-ID: <20250505212401.3379699-6-samitolvanen@google.com> Subject: [PATCH v2 0/4] gendwarfksyms: Add more kABI rules From: Sami Tolvanen To: Masahiro Yamada Cc: Luis Chamberlain , Petr Pavlu , Daniel Gomez , linux-modules@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" 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