[PATCH] D135276: [AArch64] Add support for the SEH opcode for return address signing

[Martin Storsjö via Phabricator via llvm-commits]

mstorsjo created this revision.
mstorsjo added reviewers: efriedma, zzheng, sdesmalen.
Herald added subscribers: hiraditya, kristof.beyls.
Herald added a project: All.
mstorsjo requested review of this revision.
Herald added a project: LLVM.

See https://github.com/MicrosoftDocs/cpp-docs/pull/4202 for
progress on trying to get it documented upstream.

The external facing assembler directive ".seh_sign_ra" should be
considered experimental until proper naming for the opcode has been
settled upstream.

This opcode can be expressed in packed unwind too, but I'm not
implementing that packing until documentation for these cases have
settled.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D135276

Files:
  llvm/include/llvm/Support/Win64EH.h
  llvm/lib/MC/MCWin64EH.cpp
  llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
  llvm/lib/Target/AArch64/MCTargetDesc/AArch64ELFStreamer.cpp
  llvm/lib/Target/AArch64/MCTargetDesc/AArch64TargetStreamer.h
  llvm/lib/Target/AArch64/MCTargetDesc/AArch64WinCOFFStreamer.cpp
  llvm/test/MC/AArch64/seh.s

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