[all-commits] [llvm/llvm-project] 21d2b2: [PAuth] Use different discriminators for __int128_...

[Anton Korobeynikov via All-commits]

  Branch: refs/heads/users/asl/pauth-ftype-discrimination-128
  Home:   https://github.com/llvm/llvm-project
  Commit: 21d2b2da72d9e8f3994cb913a86c093212bb8711
      https://github.com/llvm/llvm-project/commit/21d2b2da72d9e8f3994cb913a86c093212bb8711
  Author: Anton Korobeynikov <anton at korobeynikov.info>
  Date:   2025-06-01 (Sun, 01 Jun 2025)

  Changed paths:
    M clang/lib/AST/ASTContext.cpp
    M clang/test/CodeGen/ptrauth-function-type-discriminator.c

  Log Message:
  -----------
  [PAuth] Use different discriminators for __int128_t / __uint128_t / _BitInt(n)
compared to other integer types when computing function pointer type discriminator.

These parameter types have different parameter passing ABI as compared to
ordinary integer types (e.g. require 2 registers instead of 1) and therefore
this parameter passing difference could potentially be exploited should function
pointer is substituted.


  Commit: f89e872d240bd7f926d88b29741826643ed6c611
      https://github.com/llvm/llvm-project/commit/f89e872d240bd7f926d88b29741826643ed6c611
  Author: Anton Korobeynikov <anton at korobeynikov.info>
  Date:   2025-06-01 (Sun, 01 Jun 2025)

  Changed paths:
    M clang/include/clang/Basic/Features.def
    M clang/include/clang/Basic/LangOptions.def
    M clang/include/clang/Driver/Options.td
    M clang/lib/AST/ASTContext.cpp
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/lib/Frontend/CompilerInvocation.cpp
    M clang/test/CodeGen/ptrauth-function-type-discriminator.c

  Log Message:
  -----------
  Make type discrimination of 128-bit types optional


Compare: https://github.com/llvm/llvm-project/compare/26e6ea21540d...f89e872d240b

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