Issue 83864
Summary [ELF][PAC] Support .note.gnu.property for marking schema
Labels new issue
Assignees kovdan01
Reporter kovdan01
    https://github.com/ARM-software/abi-aa/pull/240 changes PAuthABIELF64 a bit. Main changes:

- GNU property becomes the main way of ELF marking, separate note section becomes an alternative;

- Compatibility info is restricted to <platform, version> tuple only (8+8=16 bytes) w/o extra info previously allowed.

Changes to be applied:

- Support related constants https://github.com/access-softek/llvm-project/commit/c8d71dfb8ed17f53a1f2164e86f41a0ba11640d6

- Frontend support https://github.com/access-softek/llvm-project/commit/a0cc186396cb71ace1981059a5e3da4af7001573

- Backend support https://github.com/access-softek/llvm-project/commit/a3ddb4e8aba8e997b76d2311b9f319afaaeabe90

- LLD support https://github.com/access-softek/llvm-project/commit/e4ff3bfc7da92ec223c8a108d40da33e9f710133


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