[all-commits] [llvm/llvm-project] 4d6fb8: [PAC][Driver] Support ptrauth flags only on ARM64 ...

[Daniil Kovalev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4d6fb8834216ba559c7baa73c0ef7f2b6998341a
      https://github.com/llvm/llvm-project/commit/4d6fb8834216ba559c7baa73c0ef7f2b6998341a
  Author: Daniil Kovalev <dkovalev at accesssoftek.com>
  Date:   2025-10-29 (Wed, 29 Oct 2025)

  Changed paths:
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/test/Driver/aarch64-ptrauth.c
    M clang/test/Frontend/aarch64-ignore-branch-protection-attribute.c

  Log Message:
  -----------
  [PAC][Driver] Support ptrauth flags only on ARM64 Darwin or with pauthtest ABI (#113152)

Most ptrauth flags are ABI-affecting, so usually we do not want them to
be
exposed to end users. Allow them only in the following cases:

- ARM64 Darwin (under certain conditions, some ptrauth driver flags are
  intended to be used in this case);
- pauthtest ABI (it's intended to be used for experimenting with signing
schema
and the signing schema is explicitly encoded in the pauth elf marking).

Leave `-faarch64-jump-table-hardening` available for all AArch64 targets
since it's not ABI-affecting.



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